U.S. patent application number 14/810298 was filed with the patent office on 2015-11-19 for power tool.
The applicant listed for this patent is Makita Corporation. Invention is credited to Masanori FURUSAWA, Yoshitaka MACHIDA, Masao MIWA, Shinji ONODA, Yoshiro TADA, Hajime TAKEUCHI, Kiyonobu YOSHIKANE.
Application Number | 20150328764 14/810298 |
Document ID | / |
Family ID | 54537750 |
Filed Date | 2015-11-19 |
United States Patent
Application |
20150328764 |
Kind Code |
A1 |
YOSHIKANE; Kiyonobu ; et
al. |
November 19, 2015 |
POWER TOOL
Abstract
A power tool includes a motor which drives a tool bit, a tool
body, a handle, and battery mount part, to which battery is
detachably mounted. The power tool includes a plurality of battery
mount parts, and the battery mount part, includes a battery
engaging part with which the battery, can engage. The battery is
mounted to the battery mount part by sliding against the battery
engaging part in a crossing direction which crosses the
longitudinal direction of the tool bit.
Inventors: |
YOSHIKANE; Kiyonobu;
(Anjo-shi, JP) ; TAKEUCHI; Hajime; (Anjo-shi,
JP) ; TADA; Yoshiro; (Anjo-shi, JP) ;
FURUSAWA; Masanori; (Anjo-shi, JP) ; MIWA; Masao;
(Anjo-shi, JP) ; ONODA; Shinji; (Anjo-shi, JP)
; MACHIDA; Yoshitaka; (Anjo-shi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Makita Corporation |
Anjo-shi |
|
JP |
|
|
Family ID: |
54537750 |
Appl. No.: |
14/810298 |
Filed: |
July 27, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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PCT/JP2014/060835 |
Apr 16, 2014 |
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14810298 |
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PCT/JP2014/052352 |
Jan 31, 2014 |
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PCT/JP2014/060835 |
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PCT/JP2014/052351 |
Jan 31, 2014 |
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PCT/JP2014/052352 |
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PCT/JP2014/052350 |
Jan 31, 2014 |
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PCT/JP2014/052351 |
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PCT/JP2014/052349 |
Jan 31, 2014 |
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PCT/JP2014/052350 |
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Current U.S.
Class: |
173/104 |
Current CPC
Class: |
B25F 5/02 20130101; B25D
16/00 20130101 |
International
Class: |
B25F 5/02 20060101
B25F005/02; B25D 16/00 20060101 B25D016/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 1, 2013 |
JP |
2013-018845 |
Feb 1, 2013 |
JP |
2013-018846 |
Feb 1, 2013 |
JP |
2013-018848 |
Feb 1, 2013 |
JP |
2013-018849 |
Apr 17, 2013 |
JP |
2013-086952 |
Claims
1. A power tool which drives a detachably attached tool bit in a
driving axis of the tool bit, comprising: a motor which drives the
tool bit, a tool body which houses the motor, a handle which is
connected to the tool body, and a battery mount part to which a
battery for providing electric current is detachably mounted,
wherein the power tool comprises a plurality of the battery mount
parts and can provide electric current from the battery mounted to
the battery mount part to the motor, the handle is provided such
that it extends in a handle extending direction crossing a driving
axis extending direction in which the driving axis extends, the
battery mount part comprises a battery engaging part with which the
battery is engageable and the battery mount part holds the battery
by engaging the battery with the battery engaging part, and the
battery is slid in a cross direction crossing both of the driving
axis extending direction and the handle extending direction with
respect to the battery engaging part and the battery is mounted to
the battery mount part.
2. The power tool according to claim 1, wherein a plurality of the
battery mount parts are aligned in the driving axis extending
direction.
3. The power tool according to claim 1, wherein the battery
engaging parts are provided such that the batteries are slid from
the same side of the tool body with respect to the cross direction
and engaged with the battery engaging parts.
4. The power tool according to claim 1, wherein a plurality of the
battery mount parts is arranged at a side opposite to the tool bit
with respect to the motor in the driving axis extending
direction.
5. The power tool according to claim 1, wherein, when the battery
is mounted to the battery mount part, a lower surface of the
battery is formed flush with a lower surface of the tool body.
6. The power tool according to claim 1, wherein the battery mount
part is formed such that a length of the battery mounted to the
battery mount part in the driving axis extending direction is
shorter than a length of the battery in the cross direction.
7. The power tool according to claim 1, wherein the batter mount
part comprises an elastic member which protrudes toward the battery
and contacts with the battery when the battery mounted to the
battery mount part.
8. The power tool according to claim 1, wherein the handle is
provided such that at least its one end side in the handle
extending direction is connected to the tool body, and a plurality
of the battery mount parts is arranged on another end side of the
handle in the handle extending direction.
9. The power tool according to claim 8, wherein the handle
comprises a grip portion which is held by a user, and the grip
portion is arranged on a driving axis line.
10. The power tool according to claim 9, wherein a plurality of the
battery mount parts is provided on the tool body at one side with
respect to the handle extending direction.
11. The power tool according to claim 8, wherein the handle
comprises a grip portion in which its one end side is connected to
the tool body and a reinforcing member which connects another end
side of the grip portion and the tool body.
12. The power tool according to claim 11, wherein a plurality of
the battery mount parts is arranged on the reinforcing member.
13. The power tool according to claim 1, wherein the motor is
arranged such that a rotational axis of the motor is intersected
with the driving axis.
14. The power tool according to claim 1, wherein the motor is
arranged such that a rotational axis of the motor is paralleled to
the driving axis.
15. The power tool according to claim 1, wherein said plurality of
battery mount parts is formed such that the combined gravity center
of a plurality of the batteries mounted to said plurality of
battery mount parts is located on a plane including the driving
axis and a handle central axis which extends in the handle
extending direction.
16. A power tool which drives a tool bit at least linearly on a
driving axis extending in a predetermined longitudinal direction,
comprising: a motor which drives the tool bit, a tool body which
houses the motor, a handle which is connected to the tool body, and
a battery mount part to which a battery for providing electric
current to the motor is detachably attached, wherein the power tool
comprises a plurality of the battery mount parts, the handle is
provided such that it extends in a handle extending direction
crossing the longitudinal direction, and the battery mount part is
fixed on the tool body and undetachable from the power tool.
17. The power tool according to claim 16, wherein the battery mount
part comprises a battery engaging part with which the battery is
engageable and the battery mount part holds the battery by engaging
the battery with the battery engaging part, the battery is slid
against the battery engaging part and mounted to the battery mount
part.
18. The power tool according to claim 16, wherein a plurality of
the battery mount parts are arranged to be aligned in a cross
direction crossing both of the longitudinal direction and the
handle extending direction, and each battery is attached by moving
in a direction parallel to the longitudinal direction.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] The present application is a continuation application of
International. Applications (1) No. PCT/JP2014/052349, filed on
Jan. 31, 2014, which claims priority to Japanese Patent Application
No. 2013-018845 filed on Feb. 1, 2013, (2) No. PCT/JP2014/052350
filed on Jan. 31, 2014, which claims priority to Japanese Patent
Application No. 2013-018846 filed on Feb. 1, 2013, (3) No.
PCT/JP2014/052351, filed on Jan. 31, 2014, which claims priority to
Japanese Patent Application No. 2013-018848 filed on Feb. 1, 2013,
(4) No. PCT/JP2014/052352 filed on Jan. 31, 2014, which claims
priority to Japanese Patent Application No. 2013-018849 filed on
Feb. 1, 2013, and (5) No. PCT/JP2014/060835 filed on Apr. 16, 2014,
which claims priority to Japanese Patent Application No.
2013-086952 filed on Apr. 17, 2013.
[0002] The contents of these applications are incorporated herein
by reference in their entirety.
FIELD OF THE INVENTION
[0003] The present invention relates to a power tool which performs
a predetermined operation.
BACKGROUND OF THE INVENTION
[0004] Japanese non-examined laid-open Patent Publication No.
2010-5751 discloses a battery type hammer drill in which the
battery is provided as a power source. In this hammer drill, one
battery is mounted on a lower surface of a downward extending part
which connects a tool body and a handle.
SUMMARY OF THE INVENTION
Problem to be Solved by the Invention
[0005] The battery utilized to the battery type hammer drill is
rechargeable, and when a battery remaining amount is reduced,
operations to detach the battery from the hammer drill and to
charge the battery and then to mount the battery again are
necessary.
[0006] However, the battery has heavy weight and therefore there is
room for improvement regarding an attaching/detaching operation of
the battery.
[0007] Accordingly, an object of the present invention is, in
consideration of the above described problem, to provide an
improved power tool with respect to an attaching and detaching
technique of a battery.
Means for Solving the Problem
[0008] The above-mentioned problem is solved by the present
invention. According to a preferable aspect of a power tool of the
present invention, a power tool which drives a detachably attached
tool bit in a driving axis of the tool bit is provided. The power
tool comprises a motor which drives the tool bit, a tool body which
houses the motor, a handle which is connected to the tool body, and
a battery mount part to which a battery for providing electric
current is detachably mounted. The power tool comprises a plurality
of the battery mount parts and can provide electric current from
the battery mounted to the battery mount part to the motor. The
handle is provided such that it extends in a handle extending
direction crossing a driving axis extending direction in which the
driving axis extends. The battery mount part comprises a battery
engaging part with which the battery is engageable and the battery
mount part holds the battery by engaging the battery with the
battery engaging part. The battery is slid in a cross direction
crossing both of the driving axis extending direction and the
handle extending direction with respect to the battery engaging
part and the battery is mounted to the battery mount part. Further,
the handle is typically and preferably provided on a predetermined
plane which includes the driving axis such that the handle extends
in the handle extending direction crossing the driving axis
extending direction.
[0009] According to the present invention, the power tool comprises
a plurality of the battery mount parts and each battery is
detachably mounted to each battery mount part.
[0010] Therefore, degree of freedom regarding an attaching of each
battery is enhanced. Further, according to the present invention,
the battery is moved in the cross direction crossing both of the
driving axis extending direction and the handle extending direction
against the battery engaging part and is mounted to the battery
mount part. Therefore, in the power tool in which vibration in the
driving axis extending direction is generated, a demounting
direction (detaching direction) of the battery is perpendicular to
a vibration direction. As a result, a possibility of dropping down
of the battery from the battery mount part due to the vibration is
reduced.
[0011] According to a further aspect of the power tool of the
present invention, a plurality of the battery mount parts are
aligned in the driving axis extending direction.
[0012] According to this aspect, a compact arrangement of a
plurality of the batteries is possible. Accordingly, an arrangement
of electric wiring which is connected to the battery mount part is
simplified.
[0013] According to a further aspect of the power tool of the
present invention, the battery engaging parts are provided such
that the batteries are slid from the same side of the tool body
with respect to the cross direction and engaged with the battery
engaging parts. In other words, the battery is slid in the cross
direction crossing both of the driving axis extending direction and
the handle extending direction against the tool body (battery mount
part) and mounted to the battery mount part. For example, in a case
that the handle extending direction is defined as a vertical
direction, the batteries which is mounted to the respective battery
mount parts are moved from one side among the right side and the
left side of the tool body.
[0014] According to this aspect, an attaching/detaching operation
of the batteries is performed at one side of the tool bit.
Accordingly, usability of the attaching/detaching operation of the
battery by a user is improved. That is, the attaching/detaching
operation is easily performed.
[0015] According to a further aspect of the power tool of the
present invention, a plurality of the battery mount parts is
arranged at a side opposite to the tool bit with respect to the
motor in the driving axis extending direction. In other words, the
motor is arranged between a plurality of the battery mount parts
and the tool bit.
[0016] According to this aspect, the battery mounted to the battery
mount part is arranged distantly form the tool bit. Accordingly,
when the operation is performed by contacting the tool bit with a
workpiece, since the battery is arranged distantly from the
workpiece, interference by the battery with the operation by the
tool bit is prevented.
[0017] According to a further aspect of the power tool of the
present invention, when the battery is mounted to the battery mount
part, a lower surface of the battery is formed flush with a lower
surface of the tool body.
[0018] According to this aspect, in addition to the lower surface
of the tool body, the lower surface of the battery is set as a
contact surface when the power tool is placed on the ground or a
floor. Accordingly, the power tool is stably placed.
[0019] According to a further aspect of the power tool of the
present invention, the battery mount part is formed such that a
length of the battery mounted to the battery mount part in the
driving axis extending direction is shorter than a length in the
cross direction.
[0020] According to this aspect, the battery mounted to the battery
mount part such that the length of the battery in the driving axis
extending direction is shorter that the length of the battery in
the cross direction. Accordingly, with respect to the driving axis
extending direction, whole length of the power tool to which the
battery is mounted is shortened.
[0021] According to a further aspect of the power tool of the
present invention, the batter mount part comprises an elastic
member which protrudes toward the battery and contacts with the
battery when the battery mounted to the battery mount part.
Typically, the elastic member is formed by a rubber, a spring and
on, and applies elastic force on the battery.
[0022] According to this aspect, the elastic member elastically
contacts with the battery mounted to the battery mount part.
Accordingly, backlash of the battery due to vibration generated
during the operation is prevented by biasing force of the elastic
member.
[0023] According to a further aspect of the power tool of the
present invention, the handle is provided such that at least its
one end side in the handle extending direction is connected to the
tool body, and each battery mount part is arranged on another end
side of the handle in the handle extending direction. The handle
preferably includes a cantilever type handle only one end of which
is connected to the tool body, and a looped type handle both ends
of which are connected to the tool body.
[0024] According to this aspect, the battery mounted to the battery
mount part is arranged distantly from the tool bit. Therefore, when
the operation is performed by contacting the tool bit with a
workpiece, the battery is arranged distantly from the workpiece.
Accordingly, interference by the battery with the operation by the
tool bit is prevented.
[0025] According to a further aspect of the power tool of the
present invention, the handle comprises a grip portion which is
held by a user, and the grip portion is arranged on a driving axis
line. Further, all of the battery mount parts are typically
arranged on the tool body at one side in the handle extending
direction.
[0026] According to this aspect, the power tool in which the grip
portion of the handle is arranged on the driving axis line is
provided. Thus, by applying force by a user on the grip portion on
the driving axis line in order to perform the operation, the force
is linearly transmitted to the tool bit. As a result, the operation
is effectively performed.
[0027] According to a further aspect of the power tool of the
present invention, the handle comprises a grip portion in which its
one end side is connected to the tool body and a reinforcing member
which connects another end side of the grip portion and the tool
body. That is, the reinforcing member is separately provided from
the grip portion. Thus, the reinforcing member connects a region of
the tool body other than a connecting region between the tool body
and the grip portion and another end side of the hand grip. In such
a construction, a plurality of the battery mount parts is
preferably arranged on the reinforcing member.
[0028] According to a further aspect of the power tool of the
present invention, the motor is arranged such that a rotational
axis of the motor is intersected with the driving axis.
[0029] According to this aspect, the power tool in which the
rotational axis of the motor and the driving axis are intersected
is provided.
[0030] According to a further aspect of the power tool of the
present invention, the motor is arranged such that a rotational
axis of the motor is paralleled to the driving axis.
[0031] According to this aspect, the power tool in which the
rotational axis of the motor and the driving axis are parallel is
provided.
[0032] According to a further aspect of the power tool of the
present invention, said plurality of battery mount parts is formed
such that the combined gravity center of a plurality of the
batteries mounted to said plurality of battery mount parts is
located on a plane including the driving axis and a handle central
axis which extends in the handle extending direction.
[0033] According to this aspect, in a case that a front-rear
direction is defined by the longitudinal direction in which the
driving axis is extended, a plurality of the batteries can be
balanced in weight with respect to a lateral direction crossing the
front-rear direction. Accordingly, operability of the power tool is
enhanced.
[0034] According to another preferable aspect of a power tool of
the present invention, a power tool which drives a tool bit at
least linearly on a driving axis extending in a predetermined
longitudinal direction is provided. The power tool comprises a
motor which drives the tool bit, a tool body which houses the
motor, a handle which is connected to the tool body, and a battery
mount part to which a battery for providing electric current is
detachably attached. The hammering tool comprises a plurality of
the battery mount parts. The handle is provided such that it
extends in a handle extending direction crossing the longitudinal
direction. The plurality of the battery mount parts is fixed on the
tool body and undetachable from the power tool.
[0035] According to the present invention, the power tool has a
plurality of battery mount parts to which batteries are detachably
mounted, and the battery mount parts are fixed on the tool body and
undetachable from the power tool. Especially, in the present
invention, the battery is typically mounted to the battery mount
part directly without an adapter. Therefore, the adapter is
unnecessary compared to a power tool in which the battery is
mounted via the adapter. As a result, a light-weighted power tool
is provided. Further, "undetachable" is a configuration in which a
part or the whole of the battery mount part is not detached easily
from the tool body. Namely, it is so-called non-adapter
configuration which does not have an adapter attached and detached
easily. For example, it may include a configuration in which the
battery mount part is formed on a region of the tool body or the
handle. In other words, the present invention is characterized to
form the battery mount part by means of a configuration which does
not allow the battery mount part to be attached and detached freely
against the power tool, or a configuration in which a free
attaching and detaching of the battery mount part is prevented. In
this respect, the present invention may not exclude a configuration
which is capable of dismantlement of the battery mount part,
however the battery mount part may be dismantled from the power
tool. Further, "fixed" is a configuration in which the battery
mount part is not relatively moved with respect to the tool body.
For example, it may preferably include a configuration in which a
part or the whole of the battery mount part is integrated with the
tool body directly or indirectly. Namely, it preferably includes a
configuration in which a part of the whole of the battery mount
part is formed integrally with the tool body, and a configuration
in which the battery mount part is fixed on the tool body by means
of welding, gluing, rivet, screw and so on.
[0036] According to a further aspect of the power tool of the
present invention, the battery mount part comprises a battery
engaging part with which the battery is engageable and the battery
mount part holds the battery by engaging the battery with the
battery engaging part. Further, the battery is slid against the
battery engaging part and mounted to the battery mount part.
[0037] According to this aspect, the battery is attached to the
battery mount part by sliding the battery against the battery mount
part. Accordingly, an attaching operation of the battery is
performed easily.
[0038] According to a further aspect of the power tool of the
present invention, a plurality of the battery mount parts are
arranged to be aligned in a cross direction crossing both of the
longitudinal direction and the handle extending direction, and each
battery is attached by moving in a direction parallel to the
longitudinal direction.
[0039] According to this aspect, since a plurality of the battery
mount parts are arranged side by side, a compact arrangement of a
plurality of the batteries is achieved. As a result, an arrangement
of electric wiring with respect to the battery mount parts is
simplified.
Effects of the Invention
[0040] Accordingly, an improved power tool with respect to an
attaching and detaching technique of the battery is provided.
[0041] Other objects, features and advantages of the present
disclosure will be readily understood after reading the following
detailed description together with the accompanying drawings and
the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0042] FIG. 1 shows a cross sectional view of whole construction of
a hammer drill of a first embodiment according to the present
invention.
[0043] FIG. 2 shows an enlarged view which shows an attaching state
of battery packs attached to battery mount parts.
[0044] FIG. 3 shows a view when viewed along an arrow A in FIG.
1.
[0045] FIG. 4 shows a view when viewed along an arrow B in FIG.
1.
[0046] FIG. 5 shows a terminal of the battery mount part.
[0047] FIG. 6 shows a perspective view of the battery pack.
[0048] FIG. 7 shows a top view of the battery pack.
[0049] FIG. 8 shows a view when viewed along an arrow C in FIG.
6.
[0050] FIG. 9 shows a view when viewed along an arrow D in FIG.
6.
[0051] FIG. 10 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a second embodiment according to the present invention.
[0052] FIG. 11 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a third embodiment according to the present invention.
[0053] FIG. 12 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a fourth embodiment according to the present invention.
[0054] FIG. 13 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a fifth embodiment according to the present invention.
[0055] FIG. 14 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a sixth embodiment according to the present invention.
[0056] FIG. 15 shows a schematic view of the hammer drill when
viewed from the rear of the hammer drill in FIG. 14.
[0057] FIG. 16 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a seventh embodiment according to the present invention.
[0058] FIG. 17 shows a schematic view of the hammer drill when
viewed from the rear of the hammer drill in FIG. 16.
[0059] FIG. 18 shows a schematic view of a modified example of the
hammer drill of the seventh embodiment.
[0060] FIG. 19 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a eighth embodiment according to the present invention.
[0061] FIG. 20 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a ninth embodiment according to the present invention.
[0062] FIG. 21 shows a schematic view of the hammer drill when
viewed from the rear of the hammer drill in FIG. 20.
[0063] FIG. 22 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a tenth embodiment according to the present invention.
[0064] FIG. 23 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of an eleventh embodiment according to the present invention.
[0065] FIG. 24 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a twelfth embodiment according to the present invention.
[0066] FIG. 25 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a thirteenth embodiment according to the present invention.
[0067] FIG. 26 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a fourteenth embodiment according to the present invention.
[0068] FIG. 27 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a fifteenth embodiment according to the present invention.
[0069] FIG. 28 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a sixteenth embodiment according to the present invention.
[0070] FIG. 29 shows a schematic view of the hammer drill when
viewed from the rear of the hammer drill in FIG. 28.
[0071] FIG. 30 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a seventeenth embodiment according to the present invention.
[0072] FIG. 31 shows a schematic view of a hammer drill of an
eighteenth embodiment according to the present invention.
[0073] FIG. 32 shows a partial cross sectional view of whole
construction of a hammer drill of a nineteenth embodiment according
to the present invention.
[0074] FIG. 33 shows a partial cross sectional view when viewed
along an arrow B in FIG. 32.
[0075] FIG. 34 shows a partial cross sectional view of whole
construction of a hammer drill of a twentieth embodiment according
to the present invention.
[0076] FIG. 35 shows a view when viewed along an arrow E in FIG.
34.
[0077] FIG. 36 shows a partial cross sectional view when viewed
from the rear side of the hammer drill (right side in FIG. 34).
[0078] FIG. 37 shows a partial cross sectional view of whole
construction of a hammer drill of a twenty-first embodiment
according to the present invention.
[0079] FIG. 38 shows a partial cross sectional view when viewed
from the rear side of the hammer drill (right side in FIG. 37).
[0080] FIG. 39 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a twenty-second embodiment according to the present
invention.
[0081] FIG. 40 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a twenty-third embodiment according to the present
invention.
[0082] FIG. 41 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a twenty-fourth embodiment according to the present
invention.
[0083] FIG. 42 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a twenty-fifth embodiment according to the present
invention.
[0084] FIG. 43 shows a view when viewed along an arrow F in FIG.
42.
[0085] FIG. 44 shows a schematic view of a hammer drill and an
arrangement of the battery packs with respect to the hammer drill
of a twenty-sixth embodiment according to the present
invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0086] Each of the additional features and method steps disclosed
above and below may be utilized separately or in conjunction with
other features and method steps to provide and manufacture improved
power tools and method for using such power tools and devices
utilized therein. Representative examples of the invention, which
examples utilized many of these additional features and method
steps in conjunction, will now be described in detail with
reference to the drawings. This detailed description is merely
intended to teach a person skilled in the art further details for
practicing preferred aspects of the present teachings and is not
intended to limit the scope of the invention. Only the claims
define the scope of the claimed invention. Therefore, combinations
of features and steps disclosed within the following detailed
description may not be necessary to practice the invention in the
broadest sense, and are instead taught merely to particularly
describe some representative examples of the invention, which
detailed description will now be given with reference to the
accompanying drawings.
First Embodiment
[0087] A first embodiment of the present invention is explained
below with reference to FIG. 1 to FIG. 9. The first embodiment is
explained by using a battery type hammer drill as a one example of
a power tool. As shown in FIG. 1, an electric hammer drill 100 to
which a hammer bit 119 is attached is the power tool which performs
a drilling operation or a chipping operation like that against a
workpiece by causing the attached hammer bit 119 to do a hammering
movement in its longitudinal direction and a rotational movement
around its longitudinal direction. The hammer bit 119 is an example
of a feature which corresponds to "a tool bit" in the present
invention.
[0088] The hammer drill 100, in an overall view, is mainly provided
with a main body 101 which forms an outline of the hammer drill
100. At a front region of the main body 101, the hammer bit 119 is
detachably attached thereto via a cylindrical tool holder 159. The
hammer bit 119 is inserted into a bit insertion hole of the tool
holder 159 and held such that it is allowed to reciprocate in its
longitudinal direction with respect to the tool holder 159 and
prevented from rotating in its circumferential direction with
respect to the tool holder 159.
[0089] The main body 101 is mainly provided with a motor housing
103 which houses an electric motor 110, and a gear housing 105
which houses a motion converting mechanism 120, a hammering
mechanism 140 and a power transmitting mechanism 150. A hand grip
109 which is held by a user is connected to the main body 101 at a
side opposite to the hammer bit 119 in the longitudinal direction
of the hammer bit 119. The main body 101 is an example of a feature
which corresponds to "a tool body" and the hand grip 109 is an
example of a feature which corresponds to "a handle" in the present
invention.
[0090] Further, in this embodiment, for the sake of convenience of
explanation, with respect to the longitudinal direction of the
hammer bit 119 or a longitudinal direction of the main body 101,
the hammer bit 119 side is referred to as a front side of the
hammer drill 100 and the hand grip 109 side is referred to as a
rear side of the hammer drill 100. Furthermore, an upper side in
FIG. 1 is referred to as an upper side of the hammer drill 100 and
a lower side in FIG. 1 is referred to as a lower side of the hammer
drill 100.
[0091] In the main body 101, the gear housing 105 is arranged in
the front and the motor housing 103 is arranged in the rear in the
longitudinal direction of the hammer bit 119. Further, the hand
grip 109 is arranged rearward of the motor housing 103. The motor
housing 103 is extended downwardly lower than a lower surface of
the gear housing 105 and the electric motor 110 is arranged in this
extended region. The electric motor 110 is arranged such that a
rotational axis of the electric motor 110 is extended so as to
incline with respect to a vertical direction and to cross a
hammering axis extending in the longitudinal direction of the
hammer bit 119. The electric motor 110 is an example of a feature
which corresponds to "a motor" and the hammering axis is an example
of a feature which corresponds to "a driving axis" in the present
invention.
[0092] Namely, the hammer drill 100 according to the first
embodiment is constructed such that the hammering axis of the
hammer bit 119 is perpendicular to the rotational axis of the
electric motor 110 and hereinafter the hammer drill having such
construction is called as a first form of the hammer drill for the
sake of convenience. Further, each of the motor housing 103, the
gear housing 105 and the hand grip 109 which forms the main body
101 is provided by connecting left and right housing members to
each other with respect to the longitudinal direction of the hammer
bit 119.
[0093] Rotational output of the electric motor 110 is converted
into a linear motion by the motion converting mechanism 120 and
then transmitted to the hammering mechanism 140, and causes impact
force in the longitudinal direction of the hammer bit 119 (lateral
direction in FIG. 1) via the hammering mechanism 140. Further, the
rotational output of the electric motor 110 is decelerated by the
power transmitting mechanism 150 and then transmitted to the hammer
bit 119, and the hammer bit 119 is rotated in its circumference
direction. The electric motor 110 is energized and driven when a
trigger 109a arranged on the hand grip 109 is pulled.
[0094] The motion converting mechanism 120 is arranged above a
motor shaft 111 of the electric motor 110 and the motion converting
mechanism 120 converts the rotational output of the motor shaft 111
into the linear motion in a front-rear direction of the hammer
drill 100. The motion converting mechanism 120 is mainly provided
with an intermediate shaft 121 which is rotationally driven by the
motor shaft 111, a rotation member 123 which is mounted to the
intermediate shaft 121, a swing member 125 which is swung in the
front-rear direction of the hammer drill 100 by rotation of the
intermediate shaft 121 (rotation member 123), a cylindrical piston
127 in the form of a driving member which is reciprocated in the
front-rear direction of the hammer drill 100 by swing motion of the
swing member 125 and a cylinder 129 which houses the piston 127.
The motor shaft 111 is arranged to incline with respect to the
intermediate shaft 121. The cylinder 129 is formed integrally with
the tool holder 159 as a rear part of the tool holder 159.
[0095] The hammering mechanism 140 is arranged above the motion
converting mechanism 120 and rearward of the tool holder 159, and
the hammering mechanism 140 transmits a linear output in the
front-rear direction of the hammer drill 100, which is converted
from the rotational output of the electric motor 110 by the motion
converting mechanism 120, to the hammer bit 119 as a hammering
force. That is, the hammering mechanism 140 is mainly provided with
a striker 143 in the form of an impact element which is slidably
disposed within the cylindrical piston 127, and an impact bolt 145
which is arranged frontward of the striker 143 and is collided by
the striker 143. Further, an inner space rearward of the striker
143 in the piston 127 forms an air chamber 127a which transmits
slide motion of the piston 127 to the striker 143 by air pressure
fluctuation.
[0096] The power transmitting mechanism 150 is arranged frontward
of the motion converting mechanism 120 and the power transmitting
mechanism 150 transmits the rotational output of the electric motor
110 transmitted from the intermediate shaft 121 of the motion
converting mechanism 120 into the tool holder 159. That is, the
power transmitting mechanism 150 is mainly provided with a gear
deceleration mechanism which comprises a plurality of gears
including a first gear 151 which is rotated integrally with the
intermediate shaft 121, a second gear 153 which is engaged and
meshed with the first gear 151 and is mounted onto the tool holder
159 (cylinder 129) and so on.
[0097] The hand grip 109 is mainly provided with a grip portion
109A which extends in a vertical direction perpendicular to the
longitudinal direction of the hammer bit 119 (hammering axis
extending direction). The hammering axis extending direction which
is a longitudinal direction of the hammer bit 119 is an example of
a feature which corresponds to "a driving axis extending direction"
in the present invention. Further, the vertical direction is an
example of a feature which corresponds to "a handle extending
direction" in the present invention. The grip potion 109A is
arranged with predetermined interval in the longitudinal direction
of the hammer bit 119 with respect to an upper part of the motor
housing 103. An upper part of the grip portion 109A is connected to
an upper connection part 103a which extends rearward in
substantially horizontal manner from a rear-upper end region of the
motor housing 103, and a lower part of the grip portion 109A is
connected to a lower connection part 103b which extends rearward in
substantially horizontal manner from an intermediate region in the
vertical direction of the motor housing 103. Further, in the first
embodiment, as shown in FIG. 1, the upper connection part 103a and
the lower connection part 103b are extended and formed integrally
with the motor housing 103, however those parts may be extended and
formed integrally with the grip portion 109A.
[0098] The lower connection part 103b of the motor housing 103
extends rearward from substantially intermediate region in the
vertical direction of the motor housing 103 and has a mount part
160 to which battery packs are mounted at its lower surface part.
The mount part 160 comprises two battery mount parts 160A,
160B.
[0099] The two battery mount parts 160A, 160B are aligned next to
each other in the longitudinal direction of the hammer bit 119.
These two battery mount parts 160A, 160B are fixed on the lower
connection part 103b in an undetachable manner from the hammer
drill 100.
[0100] Further, each battery packs 170A, 1703 for providing driving
electric current to the electric motor 110 is individually
detachably attached to each battery mount parts 160A, 160B,
respectively. The two battery mount parts 160A, 160B is an example
of a feature which corresponds to "a plurality of batter mounting
parts" in the present invention, and the battery pack 170A, 170B is
an example of a feature which corresponds to "a battery" in the
present invention. In FIG. 1 to FIG. 4, the battery packs 170A,
170B are illustrated by a chain double-dashed line.
[0101] Furthermore, an inner space is formed within the lower
connection part 103b and a controller 130 for controlling the
electric motor 110 is provided at the inner space. That is, the
controller 130 is, as shown in FIG. 1, arranged between the battery
packs 170A, 170B and the hand grip 109. In other words, the
controller 130 is horizontally arranged above the battery packs
170A, 170B. Further, as shown by the chain double-dashed line in
FIG. 1, the controller 130 may be arranged rearward of the electric
motor 110 between the battery packs 170A, 170B and the electric
motor 110.
[0102] FIG. 6 to FIG. 9 show the details of the battery pack 170A,
170B (FIG. 6 to FIG. 9 show one battery pack). The battery pack
170A, 170B is mainly provided with a substantially rectangular
parallelepiped battery case 171 and a plurality of battery cells
(not shown) which are housed in the battery case 171. The battery
pack 170A, 170B is detachably mounted to the each battery mount
part 160A, 160B by horizontally sliding along a lower surface of
the each battery mount part 160A, 160B in a lateral direction which
crosses both of the longitudinal direction of the hammer bit 119
and the extending direction of the hand grip 109. Further, each of
two battery packs 170A, 170B has the same construction
(configuration) and attachable to both of two battery mount parts
160A, 160B.
[0103] In order to slide the battery pack 170A, 170B against the
battery mount part 160A, 160B, each of pair of mount guides 173
which extends in a longitudinal direction of the battery pack 170A,
170B is provided on each side surface of an upper side of the
battery case 171. Further, a hook 175 for locking and a press
button 177 for unlocking are provided at a center part of the upper
side. The hook 175 for locking is provided at a rear side part with
respect to an attaching direction of the battery pack 170A, 170B
(sliding direction while attaching) and is biased by a spring (not
shown) such that it protrudes from an upper surface of the battery
case 171. The press button 177 for unlocking is provided at rear
side part with respect to the attaching direction of the battery
case 171 (a sliding direction while attaching). Further, the press
button 177 is mechanically linked with the hook 175 such that when
a user presses the press button 177, the hook 175 is moved in a
direction in which the hook 175 is pulled down from the upper
surface of the battery case 171.
[0104] On the other hand, as shown in FIG. 1 and FIG. 2, in each
battery mount part 160A, 160B, a front and rear pair of guide rails
161 which extend in a lateral direction crossing the longitudinal
direction of the hammer bit 119 (hammering axis) is provided,
respectively, in order to mount the battery pack 170A, 170B from a
side of the hammer drill 100.
[0105] The guide rails 161 are formed integrally with the lower
connection part 103b. The guide rails 161 form substantially
U-shaped section in the lateral direction and one end in an
extending direction of the guide rails 161 is opened as an
insertion opening for the mount guide 173. Further, the mount guide
173 of the battery pack 170A, 170B is slid against the guide rails
161 in a direction crossing both of the longitudinal direction of
the hammer bit 119 and the extending direction of the hand grip 109
and inserted.
[0106] That is, the guide rail 161 has a function as a guide mean
while mounting the battery pack 170A, 170B to the battery mount
part 160A, 160B and a function as a falling preventing mean to
prevent the battery pack 170A, 170B from falling off the battery
mount part 160A, 160B. The guide rail 161 is an example of a
feature which corresponds to "a battery engaging part" in the
present invention.
[0107] Further, as shown in FIG. 4, each battery mount part 160A,
160B comprises a recessed engagement part 163 with which the hook
175 of the battery pack 170A, 170B can engage. The engagement part
163 is arranged between the front and rear guide rails 161 at a
battery inserted side. Accordingly, when the battery pack 170A,
170B is mounted to the battery mount part 160A, 160B, the
engagement part 163 is engaged with the hook 173. Therefore, the
battery pack 170A, 170B is fixed on the battery mount part 160A,
160B and to move in a detaching direction (a direction opposite to
the sliding direction while attaching) or to fall off of the
battery pack 170A, 170B is prevented. Further, when mounting the
battery pack 170A, 170B to the battery mount part 160A, 160B, a
tapered part of the hook 173 is pressed by the engagement part 163
and once moved downward, and thereafter the hook 173 engages with
the engagement part 163 by returning to its initial position.
[0108] Each battery pack 170A, 170B mounted to each battery mount
part 160A, 160B is held such that an outer surface except an upper
surface as a mounting surface mounted to the battery mount part
160A, 160B is exposed. Further, a lower surface of the battery pack
170A, 170B is formed flush with a lower surface of the motor
housing 103. With such a construction, the lower surfaces of the
battery pack 170A, 170B and the motor housing 103 are formed as a
placement surface and thereby the hammer drill 100 is stably placed
on the ground or a floor.
[0109] As described above, the battery pack 170A, 170B is arranged
rearward of the electric motor 110 and below the hand grip 109 such
that the longitudinal direction of the battery pack 170A, 170B is
parallel to a crossing direction which crosses both of the
longitudinal direction of the hammer bit 119 and the handgrip
extending direction. Two battery packs 170A, 170B are arranged side
by side in the front-rear direction (longitudinal direction of the
hammer bit 119). That is, the battery pack 170A, 170B is mounted to
the battery mount part 160A, 160B such that its length in the
longitudinal direction of the hammer bit 119 is shorter than its
length in a direction crossing the longitudinal direction of the
hammer bit 119.
[0110] Further, in the first embodiment, with respect to two batter
pack 170A, 170B, when viewed from the rear of the hammer drill 100,
an attaching direction of the battery pack 170A, 170B is defined by
a moving (sliding) direction from a left side to a right side of
the hammer drill 100 (a direction shown by an arrow F in FIG. 3 and
FIG. 4), while a detaching direction of the battery pack 170A, 170B
is defined by an opposite moving direction. That is, in the first
embodiment, the attaching/detaching direction of the battery pack
170A and the attaching/detaching direction of the battery pack 170B
are the same direction to each other. Further, as a modified
example, the attaching/detaching direction of one battery pack 170A
and that of another battery pack 170B may be defined as different
directions to each other. Namely, when viewed from the rear of the
hammer drill 100, one battery pack 170A may be attached from the
right side of the hammer drill 100 and another battery pack 170B
may be attached from the left side of the hammer drill 100.
[0111] Further, each battery mount part 160A, 160B has a terminal
165 (refer to FIG. 5). The terminal 165 is arranged between a pair
of the front and rear guide rails 161 in each battery mount part
160A, 160B and fixed on the lower surface of the lower connection
part 103b.
[0112] Further, when the battery packs 170A, 170B are mounted to
the battery mount parts 160A, 160B, each terminal 179 (refer to
FIG. 6 and FIG. 7) of the battery packs 170A, 170B is electrically
connected to each terminal 165 which is formed on a lower surface
of each battery mount parts 160A, 160B (refer to FIG. 5), and
thereby it makes possible to provide electric current to the
electric motor 110 and the controller 130.
[0113] Further, as shown in FIG. 3, at the lower surface of each
battery mount part 160A, 160B, four cylindrical rubber pins 167 are
provided such that each of them are arranged at each corners of a
virtual rectangle. These four rubber pins 167 protrude downward at
a predetermined length and elastically bias four points downwardly
on an upper surface of the battery pack 170A, 170B which is mounted
to the battery mount part 160A, 160B. With such a construction,
shakiness of the battery pack 170A, 170B due to vibration is
prevented. The rubber pin 167 is an example of a feature which
corresponds to "an elastic member" in the present invention.
Furthermore, the rubber pin 167 may be formed other than the
cylindrical shape, and alternatively a spring element such as a
flat spring like that may be utilized instead of the rubber pin
167.
[0114] As described above, according to the first embodiment, the
battery mount parts 160A, 160B are provided at two parts as front
and rear on the lower connection part 103b of the motor housing
103, and each battery pack 170A, 170B is detachably mounted to each
battery mount part 160A, 160B. Therefore, for example, in the
hammer drill 100 of 36V specification, two 18V battery packs 170A,
170B are mounted and electrically connected in series. The 18V
battery pack has light weight much more compared to a 36V battery
pack. Accordingly, a user can perform a replacing operation of the
battery pack 170A, 170B or an attaching/detaching operation of the
battery pack 170A, 170B to/from the battery mount part 160A, 160B
easily. As a result, usability of the attaching/detaching operation
of the battery pack 170A, 170B is improved. Further, in the hammer
drill 100 of 18V specification, two 18V battery packs 170A, 170B
are electrically connected in parallel. In such a case, a long-term
driving of the hammer drill 100 becomes possible. Further, in the
hammer drill 100 of 36V/18V specification, a connecting mode of the
battery packs 170A, 170B may be switched between in series mode and
in parallel mode. In such a case, a switching switch which is
operated by a user to switch the connecting mode may preferably be
provided.
[0115] Further, according to the first embodiment, two battery
mount parts 160A, 160B are provided and fixed on the lower
connection part 103b of the motor housing 103, and the battery
packs 170A, 170B are mounted to these battery mount parts 160A,
160B. That is, two battery packs 170A, 170B are mounted directly to
the battery mount parts 16A, 160B without an adapter. Accordingly,
when mounting a plurality of battery packs, the adapter is not
required compared to a construction in which a plurality of the
battery packs are mounted to a single battery mount part via an
adapter and thereby light-weighting of the hammer drill 100 is
achieved.
[0116] Furthermore, the battery pack 170A, 170B is generally formed
as a substantially rectangular parallelepiped shape. According to
the first embodiment, the 18V battery packs 170A, 170B are aligned
in the front-rear direction and arranged on the lower connection
part 103b of the motor housing 103 such that those longitudinal
directions are perpendicular to the longitudinal direction of the
hammer bit 119. That is, when the battery packs 170A, 170B are
mounted to the battery mount parts 160A, 160B, each battery pack
170A, 170B is arranged such that its length in the longitudinal
direction of the hammer bit 119 is shorter than its length in a
direction crossing the longitudinal direction. With such a
construction, length of an arrangement space of the battery pack
170A, 170B in the longitudinal direction of the hammer bit 119
becomes shorter compared to a construction in which the
longitudinal direction of the battery packs 170A, 170B is parallel
to the longitudinal direction of the hammer bit 119. Accordingly, a
compact-shaped the hammer drill 100 in which its length in the
front-rear direction is shortened is constructed.
[0117] Further, according to the first embodiment, the battery pack
170A, 170B is mounted to the battery mount part 160A, 160B by
inserting into the battery mount part 160A, 160B from the side of
the hammer drill 100. Therefore, in the battery pack 170A, 170B,
the detaching direction of the battery pack 170A, 170B crosses the
hammering axis of the hammer bit 119 or a direction of vibration
generated by the hammering movement of the hammer bit 119.
Accordingly, the detaching direction of the battery pack 170A, 170B
does not mate with the vibration direction of the hammer drill 100,
and a possibility of falling of the battery pack 170A, 170B due to
the vibration of the hammer drill 100 is reduced.
[0118] Further, according to the first embodiment, the battery pack
170A, 170B is mounted to the battery mount part 160A, 160B by
sliding the mount guide 173 of the battery pack 170A, 170B along
the guide rail 161 of the battery mount part 160A, 160B.
Accordingly, the battery pack 170A, 170B is easily mounted.
[0119] Further, according to the first embodiment, the battery pack
170A, 170B is arranged rearward of the motor housing 103 and below
the hand grip 109. In the first form of the hammer drill 100, due
to structural characteristics in which a region of the motor
housing 130 which houses the electric motor 110 is extended
downward, a free space is provided rearward of the downward
extending region which is below the hand grip 109. Therefore, since
the battery packs 170A, 170B are arranged by utilizing the free
space, the battery packs 170A, 170B are rationally arranged.
Further, such a position of the battery packs 170A, 170B is remote
from an operation point by the hammer bit 119, and thereby the
battery packs 170A, 170B do not interfere with the working
operation.
[0120] Further, according to the first embodiment, the battery
packs 170A, 170B are arranged rearward of the motor housing 103 and
below the hand grip 109, and the lower surface of the battery packs
170A, 170B is formed flush with the lower surface of the motor
housing 103. Therefore, when the hammer drill 100 is placed on the
ground or the floor, the hammer drill 100 is stably placed.
Further, in the first embodiment, the hammering axis of the hammer
bit 119 and the rotational axis of the electric motor 110 are
inclined with each other, however it is not limited to this. For
example, the electric motor 110 may be arranged such that the
hammering axis of the hammer bit 119 and the rotational axis of the
electric motor 110 are perpendicularly intersected to each
other.
[0121] Further, according to the first embodiment, two battery
mount parts 160A, 160B are arranged side by side. Accordingly, an
arrangement of electric wiring connected to respective terminals
165 of the battery mount parts 160A, 160B to which the battery
170A, 170B is electrically connected is simplified.
Second Embodiment
[0122] Next, a second embodiment is explained with reference to
FIG. 10. As shown in FIG. 10, in the second embodiment, the
electric motor 110 is arranged such that the rotational axis of the
electric motor 110 is parallel to the hammering axis of the hammer
bit 119. In addition, the grip portion 109A of the hand grip 109 is
arranged on the hammering axis line. The hammer drill 100 according
to the second embodiment is called as a second form of the hammer
drill, for the sake of convenience. The hand grip 109 extends from
a rear-upper end region of the motor housing 103 downwardly and
crosses the longitudinal direction of the hammer bit 119. A tip end
of the grip portion 109A and a rear-lower end region of the motor
housing 103 are connected by a support member 107 for reinforcing
the hand grip, which is extended so as to incline against an
up-and-down direction (vertical direction). That is, the hand grip
109 comprises the grip portion 109A and the support member 107. The
support member 107 is an example of a feature which corresponds to
"a reinforcing member" in the present invention. Rotation of the
electric motor 110 is converted into a linear motion by the motion
converting mechanism 120 and then transmitted to the hammer bit 119
held by the tool holder 159 via the hammering mechanism 140 as
impact force. Furthermore, the rotation of the electric motor 110
is transmitted to the hammer bit 119 held by the tool holder 159
via the power transmitting mechanism 150 as rotational motion.
[0123] In the second form of the hammer drill 100 described above,
two battery mount parts 160A, 160B are provided and aligned in the
longitudinal direction of the hammer bit 119 on the lower surface
of the tip end of the grip portion 109A and the support member 107.
Further, each battery pack 170A, 170B is detachably mounted to each
battery mount part 160A, 160B. The battery pack 170A, 170B is
mounted to the battery mount part 160A, 160B by inserting (sliding)
into the battery mount part 160A, 160B in a direction crossing the
longitudinal direction of the hammer bit 119 from the side of the
hammer drill 100. Thus, according to the second embodiment, in the
second form of the hammer drill 100, similar advantage described in
the first embodiment is obtained.
Third Embodiment
[0124] Next, a third embodiment is explained with reference to FIG.
11. According to the third embodiment, in the second form of the
hammer drill 100, two battery mount parts 160A, 160B are provided
and aligned in the longitudinal direction of the hammer bit 119 so
as to be astride both lower surfaces of the motor housing 103 and
the gear housing 105. Further, each battery pack 170A, 170B is
detachably mounted to each battery mount part 160A, 160B. The
battery pack 170A, 170B is mounted to the battery mount part 160A,
160B by inserting (sliding) into the battery mount part 160A, 160B
in a direction crossing the longitudinal direction of the hammer
bit 119 from the side of the hammer drill 100. Thus, according to
the third embodiment, in the second form of the hammer drill 100,
similar advantage described in the first embodiment is
obtained.
Fourth Embodiment
[0125] Next, a fourth embodiment is explained with reference to
FIG. 12. As shown in FIG. 12, in the fourth embodiment, the grip
portion 109A of the hand grip 109 is provided so as to extend from
a lower region of the rear end side part of the motor housing 103
downwardly and crosses the longitudinal direction of the hammer bit
119. The hammer drill 100 according to the fourth embodiment is
called as a third form of the hammer drill, for the sake of
convenience.
[0126] In the third form of the hammer drill 100 described above,
two battery mount parts 160A, 160B are provided and aligned in the
longitudinal direction of the hammer bit 119 on the lower surface
of the hand grip 109 which is formed as the tip end (free end) of
the hand grip 109. Further, each battery pack 170A, 170B is
detachably mounted to each battery mount part 160A, 160B. The
battery pack 170A, 170B is mounted to the battery mount part 160A,
160B by inserting (sliding) into the battery mount part 160A, 160B
in a direction crossing the longitudinal direction of the hammer
bit 119 from the side of the hammer drill 100. Thus, according to
the fourth embodiment, in the third form of the hammer drill 100,
similar advantage described in the first embodiment is
obtained.
Fifth Embodiment
[0127] Next, a fifth embodiment is explained with reference to FIG.
13. As shown in FIG. 13, in the fifth embodiment, in addition to
the third form of the hammer drill described above, the tip end of
the grip portion 109A and a lower region of the front end side part
of the motor housing 103 are connected by the support member 107
for reinforcing the hand grip, which is extended so as to incline
against an up-and-down direction (vertical direction). That is, the
hand grip 109 comprises the grip potion 109A and the support member
107. The hammer drill 100 according to the fifth embodiment is
called as a fourth form of the hammer drill, for the sake of
convenience. The support member 107 is an example of a feature
which corresponds to "a reinforcing member" in the present
invention.
[0128] In the fourth form of the hammer drill 100, two battery
mount parts 160A, 160B are provided and aligned in the vertical
direction on a front surface region of the support member 107 (on
the support member 107). Further, each battery pack 170A, 170B is
detachably mounted to each battery mount part 160A, 160B. The
battery pack 170A, 170B is mounted to the battery mount part 160A,
160B by inserting (sliding) into the battery mount part 160A, 160B
in a direction crossing the longitudinal direction of the hammer
bit 119 from the side of the hammer drill 100. Thus, according to
the fifth embodiment, in the fourth form of the hammer drill 100,
similar advantage described in the first embodiment is
obtained.
[0129] Further, following modified examples other than the first
through fifth embodiments may be provided, however illustrations of
which are omitted for the sake of convenience.
First Modified Example
[0130] In the first form of the hammer drill 100, the lower surface
of the lower connection part 103b which connects the motor housing
103 and the hand grip 109 may be formed flush with the lower
surface the motor housing 103, and two battery mount parts 160A,
160B may be provided on the lower surface of the motor housing 103
and/or the lower connecting part 103b and aligned in the
longitudinal direction of the hammer bit 119. Further, each battery
pack 170A, 170B is detachably mounted to each battery mount part
160A, 160B. The battery pack 170A, 170B is mounted to the battery
mount part 160A, 160B by inserting (sliding) into the battery mount
part 160A, 160B in a direction crossing the longitudinal direction
of the hammer bit 119 from the side of the hammer drill 100.
Second Modified Example
[0131] In the second form of the hammer drill 100, one battery
mount part 160A may be provided on the lower surface of the tip end
of the grip portion 109A and the support member 107, and another
battery mount part 16013 may be provided so as to be astride both
lower surfaces of the motor housing 103 and the gear housing 105.
The lower surfaces of the motor housing 103 and the gear housing
105 are formed flush with each other. With such a construction, two
battery mount parts 160A, 160B are provided distantly from each
other. Further, each battery pack 170A, 170B is detachably mounted
to each battery mount part 160A, 160B. The battery pack 170A, 170B
is mounted to the battery mount part 160A, 160B by inserting
(sliding) into the battery mount part 160A, 160B in a direction
crossing the longitudinal direction of the hammer bit 119 from the
side of the hammer drill 100.
Third Modified Example
[0132] In the second form of the hammer drill 100, one battery
mount part 160A may be provided on the lower surface of the grip
portion 109A and the support member 107, and another battery mount
part 160B may be provided on the upper surface of the grip portion
109A. That is, two battery mount parts 160A, 160B are provided
distantly from each other. Further, each battery pack 170A, 170B is
detachably mounted to each battery mount part 160A, 160B. The
battery pack 170A, 170B is mounted to the battery mount part 160A,
160B by inserting (sliding) into the battery mount part 160A, 160B
in a direction crossing the longitudinal direction of the hammer
bit 119 from the side of the hammer drill 100.
Fourth Modified Example
[0133] In the third form of the hammer drill 100, one battery mount
part 160A may be provided on the lower surface of the hand grip 109
which is formed as the tip end (free end) of the hand grip 109, an
another battery mount part 160B may be provided so as to be astride
both lower surfaces of the motor housing 103 and the gear housing
105. That is, two battery mount parts 160A, 160B are provided
distantly from each other. Further, each battery pack 170A, 170B is
detachably mounted to each battery mount part 160A, 160B. The
battery pack 170A, 170B is mounted to the battery mount part 160A,
160B by inserting (sliding) into the battery mount part 160A, 160B
in a direction crossing the longitudinal direction of the hammer
bit 119 from the side of the hammer drill 100.
Fifth Modified Example
[0134] In the third form of the hammer drill 100, two battery mount
parts 160A, 160B may be provided on the upper surface of the rear
region of the motor housing 103 and aligned in the longitudinal
direction of the hammer bit 119. Further, each battery pack 170A,
170B is detachably mounted to each battery mount part 160A, 160B.
The battery pack 170A, 170B is mounted to the battery mount part
160A, 160B by inserting (sliding) into the battery mount part 160A,
160B in a direction crossing the longitudinal direction of the
hammer bit 119 from the side of the hammer drill 100.
Sixth Modified Example
[0135] In the fourth form of the hammer drill 100, two battery
mount parts 160A, 160B may be provided on the tip end of the hand
grip 109 (lower surface of the hand grip 109) and aligned in the
longitudinal direction of the hammer bit 119. Further, each battery
pack 170A, 170B is detachably mounted to each battery mount part
160A, 160B. The battery pack 170A, 1703 is mounted to the battery
mount part 160A, 160B by inserting (sliding) into the battery mount
part 160A, 1603 in a direction crossing the longitudinal direction
of the hammer bit 119 from the side of the hammer drill 100.
Seventh Modified Example
[0136] In the fourth form of the hammer drill 100, one battery
mount part 160A may be provided on the lower surface of hand grip
109 and another battery mount part 160B may be provided on the
front surface of the support member 107. That is, two battery mount
parts 160A, 160B are provided distantly from each other. Further,
each battery pack 170A, 170B is detachably mounted to each battery
mount part 160A, 160B. The battery pack 170A, 170B is mounted to
the battery mount part 160A, 160B by inserting (sliding) into the
battery mount part 160A, 160B in a direction crossing the
longitudinal direction of the hammer bit 119 from the side of the
hammer drill 100.
Eighth Modified Example
[0137] In the fourth form of the hammer drill 100, two battery
mount parts 160A, 160B may be provided on the lower surface of the
gear housing 105 and aligned in the longitudinal direction
(front-rear direction) of the hammer bit 119. Further, each battery
pack 170A, 170B is detachably mounted to each battery mount part
160A, 160B. The battery pack 170A, 170B is mounted to the battery
mount part 160A, 160B by inserting (sliding) into the battery mount
part 160A, 160B in a direction crossing the longitudinal direction
of the hammer bit 119 from the side of the hammer drill 100.
Sixth Embodiment
[0138] Next, a sixth embodiment is explained with reference to FIG.
14 and FIG. 15. According to the sixth embodiment, in the first
form of the hammer drill 100, two battery mount parts 160A, 160B
are arranged on the lower surface of the lower connection part 103b
which connects the motor housing 103 and the hand grip 109 such
that the battery mount parts 160A, 160B are aligned in a direction
crossing both of the longitudinal direction of the hammer bit 119
and the extending direction of the hand grip 109. In addition, the
battery packs 170A, 170B are attached and detached to/from two
battery mount parts 160A, 160B by moving (sliding) the battery
packs 170A, 170B against the battery mount parts 160A, 160B
parallel to the longitudinal direction of the hammer bit 119.
[0139] Namely, the battery pack 170A, 170B is attached to the
battery mount part 160A, 160B by moving the battery pack 170A, 170B
in a direction from rear to front of the hammer drill 100, while
the battery pack 170A, 170B is detached from the battery mount part
160A, 160B by moving the battery pack 170A, 170B in an opposite
direction (from front to rear of the hammer drill 100). Further,
construction other than above is similar to that of the first
embodiment. According to the sixth embodiment, the same advantage
as the first embodiment is obtained.
Seventh Embodiment
[0140] Next, a seventh embodiment is explained with reference to
FIG. 16 and FIG. 17. According to the third embodiment, in the
first form of the hammer drill 100, the battery mount parts 160A,
160B are provided on side surfaces of a vertical wall 103c which
extends downwardly. The vertical wall 103c is formed integrally
with the lower connection part 103b at a lower-center part of the
lower connection part 103b. Further, the battery mount parts 160A,
160B are provided on right and left side surfaces of the vertical
wall 103c, respectively. That is, two battery mount parts 160A,
160B are arranged at right side and left side separately via the
vertical wall 103c. Further, the battery pack 170A, 170B is
attached to and detached from the battery mount part 160A, 160B by
moving (sliding) the battery pack 170A, 170B against the battery
mount part 160A, 160B in the front-rear direction (longitudinal
direction of the hammer bit 119). Further, construction other than
above is similar to that of the first embodiment.
[0141] According to the seventh embodiment, when the hammer drill
100 is placed on the ground and so on, the vertical wall 103c is
utilized as a stand (pedestal). In such a case, a lower surface of
the vertical wall 103c is preferably formed flush with a lower
surface of the attached battery packs 170A, 170B. Accordingly, when
the hammer drill 100 is placed on the ground or a floor, the hammer
drill 100 is stably placed. Further according to the seventh
embodiment, the same advantage as the first embodiment is
obtained.
[0142] Further, in the seventh embodiment, as shown in FIG. 18,
small-size and small-capacity battery pack 170A, 170b compared to
the battery packs 170A, 170B shown in FIG. 17 may be utilized. For
example, in the battery pack of 18V specification, capacity of
normal-size (large-capacity) battery pack shown in FIG. 17 is 3 Ah
(ampere-hour), while capacity of the small-sized battery pack is
1.3 Ah. The small-sized light-weight battery pack 170A, 170B is, as
shown in FIG. 18, shortened its depth compared to the battery pack
shown in FIG. 17. Accordingly, the small-sized battery pack 170A,
170B is formed as a rectangular parallelepiped having the same
width and length other than the depth as the normal-size battery
pack. Therefore, even when the small-size battery packs 170A, 170B
are mounted to the battery mount parts 160A, 160B provided on the
right-side and left-side surfaces of the vertical wall 103, the
lower surface of the battery packs 170A, 170B mounted to the
battery mount parts 160A, 160B are formed flush with the lower
surface of the vertical wall 103c. Accordingly, when the hammer
drill 100 is placed on the ground or a floor, the hammer drill 100
is stably placed.
Eighth Embodiment
[0143] Next, an eighth embodiment is explained with reference to
FIG. 15. As shown in FIG. 19, in the eighth embodiment, the
electric motor 110 is arranged such that the rotational axis of the
electric motor 110 is parallel to the hammering axis of the hammer
bit 119. In addition, the grip portion 109A of the hand grip 109 is
arranged on the hammering axis line. The hand grip 109 is mainly
provided with the grip portion 109A and a support member 107. The
grip portion 109A extends from a rear-upper end region of the motor
housing 103 downwardly and crosses the longitudinal direction of
the hammer bit 119. The support member 107 connects the tip end of
the grip portion 109A in its extending direction and a rear-lower
end region of the motor housing 103. The support member 107 is
extended so as to incline against the vertical direction, and is
provided to reinforce the hand grip 109A. Rotation of the electric
motor 110 is converted into a linear motion by the motion
converting mechanism 120 and then transmitted to the hammer bit 119
held by the tool holder 159 via the hammering mechanism 140 as
impact force. Furthermore, the rotation of the electric motor 110
is transmitted to the hammer bit 119 held by the tool holder 159
via the power transmitting mechanism 150 as rotational motion.
[0144] In the eighth embodiment, in the second form of the hammer
drill 100 described above, two battery mount parts 160A, 160B are
provided and aligned in the longitudinal direction of the hammer
bit 119 on the lower surface of the tip end of the grip portion
109A and the support member 107. Further, the battery pack 170A is
mounted to the battery mount part 160A by moving toward rear side
of the hammer drill 100. In other words, the battery pack 170A is
mounted to the battery mount part 160A by moving in a direction
close to the rear side battery mount part 160B. On the other hand,
the battery pack 170B is mounted to the battery mount part 160B by
moving toward front side of the hammer drill 100. In other words,
the battery pack 170B is mounted to the battery mount part 160B by
moving in a direction close to the front side battery mount part
160A. Further, each battery pack 170A, 170B is detached by moving
in a direction opposite to each attaching direction. Further,
construction other than above is similar to that of the first
embodiment.
[0145] According to the eighth embodiment, two battery mount parts
160A, 160B is constructed such that the battery packs 170A, 170B
mounted to respective battery mount parts 160A, 160B are arranged
face to face in the longitudinal direction of the hammer bit 119.
Further, as the longitudinal direction of two battery packs 170A,
170B is parallel to the longitudinal direction of the hammer bit
119, to protrude of the battery packs 170A, 170B from the side of
the main body 101 is prevented. Further, according to the eighth
embodiment, substantially same advantage as the first embodiment is
obtained.
Ninth Embodiment
[0146] Next, a ninth embodiment is explained with reference to FIG.
20 and FIG. 21. As shown in FIG. 20 and FIG. 21, in the ninth
embodiment, the grip portion 109A of the hand grip 109 extends from
a rear end region of the motor housing 103 downwardly and crosses
the longitudinal direction of the hammer bit 119.
[0147] In the ninth embodiment, in the third form of the hammer
drill 100 described above, the battery mount parts 160A, 160B are
arranged on right and left side surfaces of the motor housing 103
in a rear region of the motor housing 103 in the longitudinal
direction of the hammer bit 119. That is, two battery mount parts
160A, 160B are arranged at two points of right and left of the
motor housing 103 separately via the motor housing 103. Further,
the battery packs 170A, 170B are mounted to the battery mount parts
160A, 160B by moving (sliding) the battery packs 170A, 170B from
rear side to front side of the hammer drill 100, and the battery
packs 170A, 170B are detached from the battery mount parts 160A,
160B by moving (sliding) the battery packs 170A, 170B from front
side to rear side of the hammer drill 100. Further, construction
other than above is similar to that of the first embodiment.
[0148] According to the ninth embodiment, the battery packs 170A,
170B are arranged on the both side of the hammering axis of the
hammer big 119. Therefore, the gravity center of the hammer drill
100 is arranged proximal to the hammering axis in the vertical
direction crossing the longitudinal direction of the hammer bit
119. Thus, moment around the gravity center of the hammer drill 100
during the hammering operation by the hammer bit 119 is reduced.
Further, according to the ninth embodiment, substantially same
advantage as the first embodiment is obtained.
Tenth Embodiment
[0149] Next, a tenth embodiment is explained with reference to FIG.
22. As shown in FIG. 22, in the tenth embodiment, in the fourth
form of the hammer drill 100, one battery mount part 160A is
arranged on the lower end part of the grip portion 109A as a tip
end of the hand grip 109, and another battery mount part 160B is
arranged on the front surface of the support member 107. That is,
two battery mount parts 160A, 160B are arranged separately in the
front-rear direction via the hand grip 109. Further, one battery
pack 170A is moved from rear to front of the hammer drill 100 and
mounted to one battery mount part 170A. Further, another battery
pack 170B is moved from lower to upper of the hammer drill 100 and
mounted to another battery mount part 170B. Further, construction
other than above is similar to that of the first embodiment.
[0150] According to the tenth embodiment, two battery packs 170A,
170B are rationally arranged at mutually separated two points by
utilizing the grip portion 109A of the hand grip 109 and the
support member 107. Further, according to the tenth embodiment,
substantially same advantage as the first embodiment is
obtained.
Eleventh Embodiment
[0151] Next, an eleventh embodiment is explained with reference to
FIG. 23. In the eleventh embodiment, in the first form of the
hammer drill 100, the lower surface of the lower connection part
103b which connects the motor housing 103 and the hand grip 109 is
formed as a non-stepped planar shape.
[0152] Further, in FIG. 23, the electric motor 110 is arranged such
that the rotational axis of the electric motor 110 is perpendicular
to the driving axis of the hammer bit 119, however the electric
motor 110 may be arranged such that the rotational axis of the
electric motor 110 is inclined against the vertical direction and
intersected with the driving axis of the hammer bit 119.
[0153] Further, two battery mount parts 160A, 160B are provided and
aligned in the longitudinal direction of the hammer bit 119
(front-rear direction) on the lower surface of the lower connection
part 103b. Further, the battery pack 170A is mounted to one battery
mount part 160A by moving (sliding) the battery pack 170A in a
direction close to another battery mount part 160B. On the other
hand, the battery pack 170B is mounted to another battery mount
part 160B by moving (sliding) the battery pack 170B in a direction
close to one battery mount part 160A. That is, the battery pack
170A is mounted to the battery mount part 160A by sliding against
the battery mount part 160A in a direction of an arrow 11A. On the
other hand, the battery pack 170B is mounted to the battery mount
part 160B by sliding against the battery mount part 160B in a
direction of an arrow 11B. The directions of the arrows 11A and 11B
are parallel to a driving axis extending direction in which the
driving axis of the hammer bit 119 is extended. Further,
construction other than above is similar to that of the first
embodiment.
[0154] According to the eleventh embodiment, in the first form of
the hammer drill 100, two battery mount parts 160A, 160B are
rationally arranged by utilizing the lower surfaces of the motor
housing 103 and the hand grip 109. Further, according to the
eleventh embodiment, substantially same advantage as the first
embodiment is obtained.
Twelfth Embodiment
[0155] Next, a twelfth embodiment is explained with reference to
FIG. 24. In the twelfth embodiment, in the third form of the hammer
drill 100, two battery mount parts 160A, 160B are provided and
aligned in the longitudinal direction of the hammer bit 119
(front-rear direction) on the lower surface of the tip end of the
hand grip 109. Further, the battery pack 170A is mounted to one
battery mount part 160A by moving (sliding) the battery pack 170A
in a direction close to another battery mount part 160B. On the
other hand, the battery pack 170B is mounted to another battery
mount part 160B by moving (sliding) the battery pack 170B in a
direction close to one battery mount part 160A. Further,
construction other than above is similar to that of the first
embodiment.
[0156] According to the twelfth embodiment, in the third form of
the hammer drill 100, two battery mount parts 160A, 160B are
rationally arranged by utilizing the lower surface of the tip end
of the hand grip 109. Further, according to the twelfth embodiment,
substantially same advantage as the first embodiment is
obtained.
Thirteenth Embodiment
[0157] Next, a thirteenth embodiment is explained with reference to
FIG. 25. In the thirteenth embodiment, in the fourth form of the
hammer drill 100, a lower surface of the grip portion 109A of the
hand grip 109 and a lower surface of the support member 107 which
connects the tip end of the grip portion 109A and the motor housing
103 are formed as a single flat surface. Further, two battery mount
parts 160A, 160B are provided and aligned in the longitudinal
direction of the hammer bit 119 (front-rear direction) on the flat
surface. Further, the battery pack 170A is mounted to one battery
mount part 160A by moving (sliding) the battery pack 170A in a
direction close to another battery mount part 160B. On the other
hand, the battery pack 170B is mounted to another battery mount
part 160B by moving (sliding) the battery pack 170B in a direction
close to one battery mount part 160A. Further, construction other
than above is similar to that of the first embodiment.
[0158] According to the thirteenth embodiment, in the fourth form
of the hammer drill 100, two battery mount parts 160A, 160B are
rationally arranged by utilizing the lower surfaces of the grip
portion 109A and the support member 107. Further, according to the
thirteenth embodiment, substantially same advantage as the first
embodiment is obtained.
Fourteenth Embodiment
[0159] Next, a fourteenth embodiment is explained with reference to
FIG. 26. In the fourteenth embodiment, in the first form of the
hammer drill 100, one battery mount part 160A is arranged on the
lower surface of the lower connection part 103b which connects the
motor housing 103 and the handgrip 109. On the other hand, another
battery mount part 160B is arranged on a front surface of the lower
region of the motor housing 103. That is, two battery mount parts
160A, 160B are separately arranged via the motor housing 103.
Further, the battery pack 170A is mounted to one battery mount part
160A by moving (sliding) the battery pack 170A in a direction
parallel to the longitudinal direction of the hammer bit 119. On
the other hand, the battery pack 170B is mounted to another battery
mount part 160B by moving (sliding) the battery pack 170B in the
vertical direction of the hammer drill 100. That is, the battery
pack 170A is mounted to the battery mount part 160A by sliding
against the battery mount part 160A in a direction of an arrow 24A.
On the other hand, the battery pack 170B is mounted to the battery
mount part 160B by sliding against the battery mount part 160B in a
direction of an arrow 24B. Further, the directions of the arrows
24A and 24B are parallel to a virtual plane including the driving
axis of the hammer bit 119 and an extending axis in which the grip
portion 109A of the hand grip 109 is extended. The direction of the
arrow 24A and the direction of the arrow 24B are intersected with
each other. Accordingly, a longitudinal direction of the battery
pack 170A mounted to the battery mount part 160A and a longitudinal
direction of the battery pack 170B mounted to the battery mount
part 160B are intersected with each other. Further, construction
other than above is similar to that of the first embodiment.
[0160] According to the fourteenth embodiment, in the first form of
the hammer drill 100, two battery mount parts 160A, 160B are
rationally arranged by utilizing the lower surface of the lower
connection part 103b and the front surface of the lower region of
the motor housing 103. Further, according to the fourteenth
embodiment, substantially same advantage as the first embodiment is
obtained.
Fifteenth Embodiment
[0161] Next, a fifteenth embodiment is explained with reference to
FIG. 27. In the fifteenth embodiment, in the second form of the
hammer drill 100, one battery mount part 160A is arranged on the
lower surface of the tip end of the grip part 109A and the support
member 107, and another battery mount part 160B is arranged on the
lower surface of the motor housing 103. That is, two battery mount
parts 160A, 160B are separately arranged in the front-rear
direction via the motor housing 103 and the hand grip 109. Further,
the battery packs 170A, 170B are mounted to the battery mount parts
160A, 160B respectively by moving (sliding) the battery packs 170A,
170B in a direction parallel to the longitudinal direction of the
hammer bit 119. Further, construction other than above is similar
to that of the first embodiment.
[0162] According to the fifteenth embodiment, in the second form of
the hammer drill 100, two battery mount parts 160A, 160B are
rationally arranged by utilizing the lower surface of the tip end
of the grip portion 109A and the support member 107 and a part of
the motor housing 103. Further, according to the fifteenth
embodiment, substantially same advantage as the first embodiment is
obtained.
Sixteenth Embodiment
[0163] Next, a sixteenth embodiment is explained with reference to
FIG. 28 and FIG. 29. In the sixteenth embodiment, in the second
form of the hammer drill 100, the battery mount parts 160A, 160B
are arranged on the right and left side surfaces of the motor
housing 103 and the gear housing 105 so as to be astride both of
the motor housing 103 and the gear housing 105. That is, two
battery mount parts 160A, 160B are separately arranged on two
points of the right and left side surfaces via the motor housing
103 and the gear housing 105. Further, the battery packs 170A, 170B
are mounted to the battery mount parts 160A, 160B by moving
(sliding) the battery packs 170A, 170B in a direction from rear to
front of the hammer drill 100 and detached from the battery mount
parts 160A, 160B by moving (sliding) the battery packs 170A, 170B
in a direction from front to rear of the hammer drill 100. Further,
construction other than above is similar to that of the first
embodiment.
[0164] According to the sixteenth embodiment, the battery packs
170A, 170B are arranged on the both side of the hammering axis of
the hammer big 119. Therefore, the gravity center of the hammer
drill 100 is arranged proximal to the hammering axis in the
vertical direction crossing the longitudinal direction of the
hammer bit 119. Thus, moment around the gravity center of the
hammer drill 100 during the hammering operation by the hammer bit
119 is reduced. Further, according to the sixteenth embodiment,
substantially same advantage as the first embodiment is
obtained.
Seventeenth Embodiment
[0165] Next, a seventeenth embodiment is explained with reference
to FIG. 30. In the seventeenth embodiment, in the third form of the
hammer drill 100, one battery mount part 160A is arranged on the
tip end of the hand grip 109 and another battery mount part 160B is
arranged on the lower surfaces of the motor housing 103 and the
gear housing 105. The lower surface of the motor housing 103 is
formed flush with the lower surface of the gear housing 105.
Therefore, two battery mount parts 160A, 160B are separately
arranged via the motor housing 103 and the gear housing 105.
Further, the battery packs 170A, 170B are mounted to the battery
mount parts 160A, 160B by moving (sliding) the battery packs 170A,
170B in the longitudinal direction of the hammer bit 119 against
two battery mount parts 160A, 160B.
Eighteenth Embodiment
[0166] Next, an eighteenth embodiment is explained with reference
to FIG. 31. In the eighteenth embodiment, the battery packs 170A,
170B which are mounted to the lower surface of the lower connection
part 103 so as to be aligned in the front-rear direction are
covered by a rotatable cover member 180. The cover member 180 is
made of elastomer and the cover member 180 is a boxed member formed
as substantially rectangular parallelepiped having opened upper and
front surfaces. A front-rear part of the cover member 180 is
mounted to the motor housing 103 via a support shaft 181 in a
rotatable manner. Accordingly, the cover member 180 is rotated
upward and thereby the whole of the battery packs 170A, 170B is
covered by the cover member 180 as illustrated by a solid line in
FIG. 31. On the other hand, the cover member 180 is rotated
downward and thereby the battery packs 170A, 170B are exposed as
illustrated by a chain double-dashed line in FIG. 31. Thus, to
detach the battery packs 170A, 170B is allowed. Further, the cover
member 180 comprises an engagement recess 183 and when the cover
member 180 is rotated upward, the engagement recess 183 is engaged
with an engagement protrusion 185 formed at a rear end part of the
lower connection part 103b. Accordingly, the cover member 180 is
held in its closed position.
[0167] According to the eighteenth embodiment, the battery packs
170A, 170B mounted on the lower surface of the lower connection
part 103b are covered by the cover member 180. With such a
construction, a dust proof effect and a water proof effect with
respect to the battery pack 170A, 170B are obtained. In addition,
an inadvertent falling of the battery packs 170A, 170B is prevented
by the cover member 180. Furthermore, the cover member 180 protects
the battery packs 170A, 170B from the external force.
[0168] In the eighteenth embodiment, the cover member 180 is
mounted to the motor housing 103 in an undetachable manner, however
it is not limited to this. For example, the cover member 180 may be
mounted to the motor housing 103 in a detachable manner. In such a
case, the cover member may be attached to a plurality of the
battery packs and thereby the plurality of the battery packs is
integrated. That is, the plurality of the battery packs is disposed
inside the cover member and thereby an assembly of the plurality of
the battery packs and the cover member is formed. In this assembly,
the terminals and the mount guides of the plurality of the battery
packs are exposed from the cover member for mounting to the battery
mount parts. Further, when the assembly is mounted to the battery
mount parts, the cover member is contacted with the battery mount
parts. With such a construction, the battery packs are sealed by
the cover member.
[0169] As described above, in an aspect to form the assembly, the
cover member is attached and detached as needed. Further, the
plurality of the battery packs are attached to the battery mount
parts by a single attaching operation. Further, the plurality of
the battery packs detached from the hammer drill is integrally
held. Accordingly, missing of the battery packs is prevented.
[0170] Further, the cover member 180 may be applicable to a hammer
as a hammering tool other than the hammer drill 100. Further, apart
from the hammering tool, the present invention is applicable to a
power tool such as an electric driver, an electric wrench, an
electric grinder, an electric reciprocating saw, an electric jigsaw
and so on to which a plurality of battery packs can be mounted.
Nineteenth Embodiment
[0171] Next, a nineteenth embodiment is explained with reference to
FIG. 32 and FIG. 33. In the nineteenth embodiment, with respect to
two of the front and rear battery mount parts 160A, 160B, when
viewed from the rear of the hammer drill 100, an attaching
direction of the battery pack 170A, 170B is defined by a moving
(sliding) direction from a left side to a right side of the hammer
drill 100 (a direction shown by an arrow F in FIG. 32 and FIG. 33),
while a detaching direction of the battery pack 170A, 170B is
defined by its opposite moving direction. That is, respective
battery packs 170A, 170B are mounted to two of the front and rear
battery mount parts 160A, 160B by moving in the same direction to
each other.
[0172] Further, two of the front and rear battery mount parts 160A,
160B is formed such that each gravity center of the battery pack
170A, 170B mounted to each battery mount part 160A, 160B is located
on a plane including the driving axis of the hammer bit 119 and the
center axis of the hand grip 109. Further, construction other than
above is similar to that of the first embodiment.
[0173] According to the nineteenth embodiment, in two of the front
and rear battery mount parts 160A, 160B, in a state that the
battery packs 170A, 170B are mounted respectively, each gravity
center of the battery pack 170A, 170B is located on the plane
including the driving axis of the hammer bit 119 and the center
axis of the hand grip 109. With such a construction, the batteries
170A, 170B can be balanced in weight with respect to the lateral
direction of the hammer drill 100, and thereby operability of the
hammer drill 100 is prevented from being damaged.
[0174] Further, according to the nineteenth embodiment, the battery
pack 170A, 170B is mounted to the battery mount part 160A, 160B by
sliding the mount guide 173 of the battery pack 170A, 170B along
the guide rail 161 of the battery mount part 160A, 160B.
Accordingly, the battery pack 170A, 170B can be easily mounted.
[0175] Further, according to the nineteenth embodiment, as shown in
FIG. 33, an elastomer 104 formed as an elastic member for
cushioning is installed on side outer surfaces of the lower
connection part 103b of the motor housing 103 is provided so as to
extend in the front-rear direction. When the hammer drill 100 is
placed on the ground by in a sideward posture in which its side
surface is contacted with the ground, the tip end of the elastomer
104 contacts with the ground. With such a construction, end
surfaces in the longitudinal direction of the battery packs 170A,
170B are avoided contacting directly with the ground. Accordingly,
the battery packs 170A, 170B are protected by being damaged due to
contact with the ground.
Twentieth Embodiment
[0176] Next, a twentieth embodiment of the present invention is
explained with reference to FIG. 34 to FIG. 36. As shown in FIG. 34
to FIG. 36, according to the twentieth embodiment, in a
construction in which two of the front and rear battery packs 170A,
170B are mounted by inserting from the side of the hammer drill 100
(in a direction crossing both of the longitudinal direction of the
hammer bit 119 and an extending direction of the hand grip 109),
those inserting directions are set to be opposite to each other.
Constructions other than that described above are similar to those
in the hammer drill 100 according to the nineteenth embodiment.
[0177] In the twentieth embodiment, with respect to components of
two of the front and rear battery mount parts 160A, 160B, the
arrangement and direction of the engagement part 163 and the
terminal 165 of the front battery mount part 160A are formed
opposite to those of the rear battery mount part 160B. With such a
construction, as shown by arrows F in FIG. 35, one (front) battery
pack 170A is mounted to the battery mount parts by moving the
battery pack 170A from the right side to the left side of the
hammer drill 100, and another (rear) battery pack 170B is mounted
to the battery mount part by moving the battery pack 170B from the
left side to the right side of the hammer drill 100.
[0178] According to the twentieth embodiment, two (even number) of
the battery packs 170A, 170B are moved in respective directions
against the hammer drill 100 and mounted. With such a construction,
the combined gravity center of the battery packs 170A, 170B is
located on a plane including the driving axis of the hammer bit 119
and the center axis of the hand grip 109. Therefore, it is not
necessary to set the battery mount parts 160A, 160B in order to
place the combined gravity center of the battery packs 170A, 170B
on the plane including the driving axis of the hammer bit 119 and
the center axis of the hand grip 109. Further, apart from the
above, similar advantage as the first embodiment is obtained.
Twenty-First Embodiment
[0179] Next, a twenty-first embodiment of the present invention is
explained with reference to FIG. 37 and FIG. 38. In the
twenty-first embodiment, one battery mount part 160A is provided on
the lower surface of the lower connection part 103b of the motor
housing 103. Further, one battery pack 170A is mounted to the
battery mount part 160A by moving the battery pack 170A from the
side of the hammer drill 100 (in a cross direction crossing both of
the longitudinal direction of the hammer bit 119 and an extending
direction of the hand grip 109).
[0180] According to the twenty-first embodiment, since an
arrangement space for the battery pack 170A is reduced, a lower
part of the electric motor 110 can be shifted rearward. Therefore,
as shown in FIG. 37, the rotational shaft of the electric motor 110
can be arranged so as to be perpendicular to the driving axis and
thereby the motor housing 103 is formed compact and to downsize the
hammer drill 110 is possible. Further, apart from the above,
similar advantage as the first embodiment is obtained.
Twenty-Second Embodiment
[0181] Next, a twenty-second embodiment of the present invention is
explained with reference to FIG. 39. As shown in FIG. 39, according
to the twenty-second embodiment, a vertical wall 103 which extends
downwardly is provided at the center region of the lower surface of
the lower connection part 103b of the motor housing 103. The
vertical wall 103c is arranged between the front battery mount part
160A and the rear battery mount part 160B. The lower surface of the
vertical wall 103c is formed flush with the lower surface of the
hammer drill 100 (the lower surface of the motor housing 103).
Further, constructions other than that described above are similar
to those in the hammer drill 100 according to the nineteenth
embodiment.
[0182] According to the twenty-second embodiment, when the hammer
drill 100 is placed on the ground, the vertical wall 103c is
utilized as a stand (pedestal) together with the lower surface of
the motor housing 103. Thus, the hammer drill 100 is stably placed.
Further, apart from the above, similar advantage as the first
embodiment is obtained. Further, in the twenty-second embodiment,
the inserting directions of the battery packs 170A, 170B to the
battery mount parts 160A, 160B may be defined as the same
directions to each other similar to the nineteenth embodiment or
defined as the opposite directions to each other similar to the
twentieth embodiment.
Twenty-Third Embodiment
[0183] Next, a twenty-second embodiment is explained with reference
to FIG. 40. According to the twenty-second embodiment, in the
fourth form of the hammer drill 100, an arrangement of the battery
mount parts 160A, 160B is different from the hammer drill 100
according to the fifth embodiment. Constructions other than the
battery mount parts 160A, 160B are similar to those in the hammer
drill 100 according to the fifth embodiment, and therefore the same
reference numerals are assigned and explanations thereof are
omitted.
[0184] In the twenty-third embodiment, as shown in FIG. 40, the
battery mount parts 160A, 160B are provided on an upper surface
(upper side in FIG. 40) of the main body 101 in a direction in
which the hand grip 109 is extended. The battery pack 170A is
mounted to the battery mount part 160A by sliding against the
battery mount part 160A in a direction of an arrow 23A. On the
other hand, the battery pack 170B is mounted to the battery mount
part 160B by sliding against the battery mount part 160B in a
direction of an arrow 23B. The directions of the arrows 23A and 23B
are parallel to a driving axis extending direction in which the
driving axis of the hammer bit 119 is extended.
[0185] According to the twenty-third embodiment, with respect to
the direction in which the hand grip 109 is extended, the battery
mount parts 160A, 160B are arranged upward of a region of the main
body 101, to which the hand grip 109 is connected. Accordingly, a
free space on the upper side of the main body 101 is effectively
utilized.
Twenty-Fourth Embodiment
[0186] Next, a twenty-fourth embodiment is explained with reference
to FIG. 41. According to the twenty-fourth embodiment, in the
second form of the hammer drill 100, an arrangement of the battery
mount part 160B is different from the hammer drill 100 according to
the fifteenth embodiment. Constructions other than the battery
mount part 160B are similar to those in the hammer drill 100
according to the fifteenth embodiment, and therefore the same
reference numerals are assigned and explanations thereof are
omitted.
[0187] As shown in FIG. 41, in the twenty-fourth embodiment, with
respect to a vertical direction in FIG. 41 in which the hand grip
109 is extended, the battery mount part 170A is arranged at a lower
side of the main body 101 (lower side in FIG. 41) and the battery
mount part 170B is arranged at an upper side of the main body 101
(upper side in FIG. 41). Specifically, the battery mount part 160A
is arranged on the lower end part of the hand grip 109 and the
battery mount part 160B is arranged on the upper end part of the
hand grip 109. The battery pack 170A is mounted to the battery
mount part 160A by sliding against the battery mount part 160A in a
direction of an arrow 24A. On the other hand, the battery pack 170B
is mounted to the battery mount part 160B by sliding against the
battery mount part 160B in a direction of an arrow 24B. Further,
the directions of the arrows 24A and 24B are parallel to a driving
axis extending direction in which the driving axis of the hammer
bit 119 is extended, and the direction of the arrow 24A is a
direction from front to rear of the hammer drill 100, and the
direction of arrow 24B is a direction from rear to front of the
hammer drill 100. Further, in the twenty-fourth embodiment,
attaching directions of the battery packs 170A, 170B are different
directions to each other, however attaching directions of the
battery packs 170A, 170B may be matched with each other. On the
other hand, each battery mount parts 160A, 160B may be formed such
that the battery pack 170A is slid in the direction of the arrow
24B and mounted to the battery mount part 160A, and the battery
pack 170B is slid in the direction of the arrow 24A and mounted to
the battery mount part 160B.
Twenty-Fifth Embodiment
[0188] Next, a twenty-fifth embodiment is explained with reference
to FIG. 42 and FIG. 43. According to the twenty-fifth embodiment,
in the first form of the hammer drill 100, an arrangement of the
battery mount parts 160A, 160B is different from the hammer drill
100 according to the first embodiment, and the hammer drill 100
according to the twenty-fifth embodiment further comprises an
additional device mounting part 190. Constructions other than the
arrangement of the battery mount parts 160A, 160B are similar to
those in the hammer drill 100 according to the first embodiment,
and therefore the same reference numerals are assigned and
explanations thereof are omitted.
[0189] In the hammer drill 100 according to the twenty-fifth
embodiment, the battery mount parts 160A, 160B are respectively
arranged on both sides of the main body 101 in a direction (lateral
direction in FIG. 43) crossing both of the longitudinal direction
of the hammer bit 119 (lateral direction in FIG. 42) and a
direction in which the hand grip 109 is extended (vertical
direction in FIG. 42). The battery packs 170A, 170B are
respectively mounted to the battery mount parts 160A, 160B by
sliding against the battery mount parts 160A, 160B in a direction
of an arrow 25A shown in FIG. 42. Further, the direction of the
arrow 25A is parallel to the driving axis extending direction in
which the driving axis of the hammer bit 119 is extended.
[0190] Further, in the twenty-fifth embodiment, the additional
device mounting part 190 is formed at a lower part of the hand grip
109 and rearward of the motor housing 103. The additional device
mounting part 190 comprises an engaging part (not shown). For
example, large-sized battery pack larger than the battery pack
170A, 170B, a dust collecting device and so on are mounted to the
additional device mounting part 190. The large-sized battery pack
or the dust collecting device is engaged with the engaging part of
the additional device mounting part 190 and held by the additional
device mounting part 190.
Twenty-Sixth Embodiment
[0191] Next, a twenty-sixth embodiment is explained with reference
to FIG. 44. According to the twenty-sixth embodiment, in the second
form of the hammer drill 100, to provide only one battery mount
part is different from the hammer drill 100 according to the
fifteenth embodiment. Constructions other than the battery mount
part are similar to those in the hammer drill 100 according to the
fifteenth embodiment, and therefore the same reference numerals are
assigned and explanations thereof are omitted.
[0192] In the hammer drill 100 according to the fifteenth
embodiment, the battery mount part 160A is arranged on the lower
part of the main body 101 (lower part of the motor housing 103) and
frontward of the hand grip 109 (support member 107). The battery
pack 170A with voltage required for driving the electric motor 110
is mounted to the battery mount part 160A. The battery pack 170A is
mounted to the battery mount part 160A by sliding against the
battery mount part 160A in a direction of an arrow 26A. Further,
the direction of the arrow 26A is parallel to the driving axis
extending direction in which the driving axis of the hammer bit 119
is extended.
[0193] According to the twenty-sixth embodiment, since the battery
mount part 160A is provided on the motor housing 103, the gravity
center of the hammer drill 100 can be closer to the driving axis of
the hammer bit 119. Further, a free space on the main body 101 of
the hammer drill 100 and frontward of the hand grip 109 is
effectively utilized.
[0194] Further, the arrangement of two battery mount parts 160A,
160B and the moving direction of the battery packs 170A, 170B while
attaching may be utilized from combination of each aspect described
in the first through twenty-sixth embodiments as needed.
[0195] Furthermore, in the first through twenty-sixth embodiments
described above, the mount part 160 is fixed on the main body 101
or the handgrip 109, however it is not limited to this. For
example, the mount part 160 may be attachable to or detachable from
the main body 101 or the hand grip 109. Further, the battery pack
may be attached via a predetermined adapter to a region from which
the mount part 160 is detached. Further, in the first through
twenty-sixth embodiments, two battery mount parts 160A, 160B are
provided, however more than three battery mount parts may be
provided.
[0196] Further, in the first through twenty-sixth embodiments
described above, as an example of the power tool, the hammer drill
100 in which the hammer bit 119 performs the hammering operation
and the rotational operation is utilized for explanation, however
it is not limited to this. For example, the present invention is
applicable to a hammer which only performs the hammering operation
as the power tool. Apart from that, as the power tool, the present
invention is applicable to an electric driver, an electric wrench,
an electric grinder, an electric reciprocating saw or an electric
jigsaw.
[0197] Having regard to an aspect of the present invention,
following features are provided as the power tool according to the
present invention. Further, each feature may be utilized
independently or in conjunction with other feature(s) or claimed
invention(s).
(Feature 1)
[0198] A power tool which drives a detachably attached tool bit in
a driving axis of the tool bit, comprising:
[0199] a motor which drives the motor,
[0200] a tool body which houses the motor,
[0201] a handle which is connected to the tool body, and
[0202] a plurality of battery mount parts to which a battery for
providing electric current to the motor is detachably mounted,
[0203] wherein the power tool is configured to be able to provide
electric current from a plurality of the batteries mounted to said
plurality of the battery mount parts to the motor,
[0204] the handle is provided on a predetermined plane which
includes the driving axis such that the handle extends in a handle
extending direction crossing a driving axis extending direction in
which the driving axis extends,
[0205] each battery mount part comprises a battery engaging part
with which the battery is engageable and holds the battery by
engaging the battery with the battery engaging part, and
[0206] the battery is slid against the battery engaging part in a
normal direction of the predetermined plane and mounted to the
battery mount part.
(Feature 2)
[0207] The battery engaging part comprises a guide rail on which
the battery is engaged and slid.
(Feature 3)
[0208] The guide rail of the battery engaging part is provided so
as to extend in a direction crossing both of the driving axis
extending direction and the handle extending direction.
(Feature 4)
[0209] The tool body has a tool body lower surface which is formed
flush with the lower surface of the battery when the battery is
mounted to the battery mount part.
(Feature 5)
[0210] A plurality of the battery mount parts are electrically
connected to each other such that the mounted batteries are
electrically connected in series.
(Feature 6)
[0211] A plurality of the battery mount parts are electrically
connected to each other such that the mounted batteries are
electrically connected in parallel.
(Feature 7)
[0212] A plurality of the battery mount parts are electrically
connected to each other such that a first connecting mode in which
the mounted batteries are electrically connected in series and a
second connecting mode in which the mounted batteries are
electrically connected in parallel are switchable.
(Feature 8)
[0213] A power tool which drives a detachably attached tool bit in
a driving axis of the tool bit, comprising:
[0214] a motor which drives the tool bit,
[0215] a tool body which houses the motor, and
[0216] a battery mount part to which a battery for providing
electric current is detachably mounted,
[0217] wherein the power tool comprises two battery mount parts and
can provide electric current from the battery mounted to the
battery mount part to the motor,
[0218] two battery mount parts are aligned on a straight line
extending in a predetermined direction,
[0219] the battery mount part comprises a battery engaging part and
holds the battery by engaging the battery with the battery engaging
part,
[0220] the battery is mounted to one battery mount part among said
two battery mount parts by sliding the battery on the battery
engaging part in a direction in which the battery approaches
another battery mount part, and
[0221] the battery is mounted to another battery mount part among
said two battery mount parts by sliding the battery on the battery
engaging part in a direction in which the battery approaches the
one battery mount part.
(Feature 9)
[0222] The power tool according to feature 8, wherein the
predetermined direction is defined as a direction parallel to the
driving axis.
(Feature 10)
[0223] The power tool according to feature 8 or 9, further
comprising a handle which is connected to the tool body,
[0224] wherein the handle is provided such that it extends in a
handle extending direction crossing the driving axis, of which at
least one end side in the handle extending direction is connected
to the tool body, and
[0225] two battery mount parts are arranged at another end side of
the handle in the handle extending direction.
(Feature 11)
[0226] The power tool according to feature 8 or 9, further
comprising a handle which is connected to the tool body,
[0227] wherein the handle is provided such that it extends in a
handle extending direction crossing the driving axis, of which at
least one end side in the handle extending direction is connected
to the tool body, and
[0228] two battery mount parts are arranged on the tool body at
said one end side of the handle in the handle extending
direction.
(Feature 12)
[0229] The power tool according to any one of features 8 to 11,
wherein the motor is arranged such that a rotational axis of the
motor is intersected with the driving axis.
(Feature 13)
[0230] The power tool according to any one of features 8 to 11,
wherein the motor is arranged such that a rotational axis of the
motor is parallel to the driving axis.
(Feature 14)
[0231] The power tool according to feature 10 or 11, wherein the
motor is arranged such that a rotational axis of the motor is
parallel to the driving axis,
[0232] the handle includes a grip portion which is held by a user,
and
[0233] the grip portion is arranged on the driving axis line.
(Feature 15)
[0234] The power tool according to feature 10 or 11, wherein the
motor is arranged such that a rotational axis of the motor is
parallel to the driving axis,
[0235] the handle includes a grip portion of which one end side is
connected to the tool body and a reinforcing member which further
connects another end side of the grip portion and the tool
body.
(Feature 16)
[0236] The power tool according to any one of features 8 to 15,
wherein two batteries are mounted to said two battery mount parts
respectively such that a front surface of one battery with respect
to a sliding direction of said one battery against the battery
engaging part when said one battery is mounted to one battery mount
part and a front surface of another battery with respect to a
sliding direction of said another battery against the battery
engaging part when said another battery is mounted to another
battery mount part face each other.
(Feature 17)
[0237] A power tool which drives a detachably attached tool bit in
a driving axis of the tool bit, comprising:
[0238] a motor which drives the tool bit,
[0239] a tool body which houses the motor,
[0240] a handle which is connected to the tool body, and
[0241] a battery mount part to which a battery for providing
electric current is detachably mounted,
[0242] wherein the power tool comprises two battery mount parts and
can provide electric current from the battery mounted to the
battery mount part to the motor, and
[0243] said two battery mount parts are arranged at mutually
separated two points between which the tool body and/or the handle
are/is arranged.
(Feature 18)
[0244] The power tool according to feature 17, wherein the handle
is arranged so as to extend in a handle extending direction
crossing a driving axis extending direction in which the driving
axis is extended, of which at least one end side in the handle
extending direction is connected to the tool body, and
[0245] one battery mount part among said two battery mount parts is
arranged at another end side of the handle in the handle extending
direction.
(Feature 19)
[0246] The power tool according to feature 18, wherein another
battery mount part among said two battery mount parts is arranged
on the tool body at one side of the tool body in the handle
extending direction.
(Feature 20)
[0247] The power tool according to feature 19, wherein said another
battery mount part among said two battery mount parts is arranged
on the tool body at the same side with respect to the driving axis
as said one battery mount part.
(Feature 21)
[0248] The power tool according to any one of features 18 to 20,
wherein the motor is arranged such that a rotational axis of the
motor is parallel to the driving axis.
(Feature 22)
[0249] The power tool according to feature 21, wherein the handle
comprises a grip portion which is held by a user, and
[0250] the grip portion is arranged on a driving axis line.
(Feature 23)
[0251] The power tool according to feature 21, wherein the handle
comprises a grip portion in which its one end side is connected to
the tool body and a reinforcing member which connects another end
side of the grip portion and the tool body, and
[0252] another battery mount part among said two battery mount
parts is arranged on the reinforcing member.
(Feature 24)
[0253] The power tool according to feature 18, wherein the motor is
arranged such that a rotational axis of the motor is intersected
with the driving axis, and
[0254] another battery mount part among said two battery mount
parts is arranged at a side opposite to said one battery mount part
with respect to the motor in the driving axis extending
direction.
(Feature 25)
[0255] The power tool according to feature 17, wherein the handle
is arranged so as to extend in a handle extending direction
crossing a driving axis extending direction in which the driving
axis is extended, and
[0256] said two battery mount parts are arranged at both sides of
the tool body in a cross direction crossing both of the driving
axis extending direction and the handle extending direction.
(Feature 26)
[0257] The power tool according to any one of features 17 to 21,
wherein said two battery mount parts are arranged so as to be
mutually separated with respect to an extending direction in which
the driving axis is extended.
(Feature 27)
[0258] The power tool according to any one of features 17 to 21,
wherein said two battery mount parts are arranged so as to be
mutually separated with respect to a direction crossing an
extending direction in which the driving axis is extended.
(Feature 28)
[0259] The power tool according to any one of features 17 to 27,
wherein the battery mount part comprises a battery engaging part
and holds the battery by engaging the battery with the battery
engaging part,
[0260] the battery engaging part is formed so as to extend in a
direction parallel to a virtual plane including the driving axis
and a handle extending axis of the handle which extends in the
handle extending direction, and
[0261] the battery is mounted to the battery mount part by sliding
against the battery engaging part in a direction parallel to the
virtual plane.
(Feature 29)
[0262] The power tool according to any one of features 17 to 28,
wherein the battery to be mounted to the battery mount parts is
formed as an elongate-shape which extends in a predetermined
longitudinal direction, and
[0263] said two battery mount parts are formed such that a
longitudinal direction of the battery mounted to one battery mount
part among said two battery mount parts and a longitudinal
direction of the battery mounted to another battery mount part are
parallel to each other.
(Feature 30)
[0264] The power tool according to any one of features 17 to 28,
wherein the battery to be mounted to the battery mount parts is
formed as an elongate-shape which extends in a predetermined
longitudinal direction, and
[0265] said two battery mount parts are formed such that a
longitudinal direction of the battery mounted to one battery mount
part among said two battery mount parts and a longitudinal
direction of the battery mounted to another battery mount part are
intersected with each other.
(Feature 31)
[0266] A hammering tool which drives a tool bit at least linearly
on a driving axis extending in a predetermined longitudinal
direction, comprising:
[0267] a motor which drives the tool bit,
[0268] a tool body which houses the motor,
[0269] a handle which is connected to the tool body, and
[0270] a battery mount part to which a battery for providing
electric current to the motor is detachably attached,
[0271] wherein the hammering tool comprises a plurality of the
battery mount parts,
[0272] the handle is provided such that it extends in a handle
extending direction crossing the longitudinal direction, and
[0273] the battery mount part is fixed on the tool body and
undetachable from the hammering tool.
(Feature 32)
[0274] The hammering tool according to feature 31, wherein the
battery mount part comprises a battery engaging part with which the
battery is engageable and the battery mount part holds the battery
by engaging the battery with the battery engaging part,
[0275] the battery is slid against the battery engaging part and
mounted to the battery mount part.
(Feature 33)
[0276] The hammering tool according to feature 32, wherein a
plurality of the battery engaging parts are provided such that the
batteries are attached by moving each battery in the same
direction.
(Feature 34)
[0277] The hammering tool according to feature 32 or 33, wherein a
plurality of the battery mount parts are arranged to be aligned in
the longitudinal direction, and each battery is attached by moving
in a cross direction crossing both of the longitudinal direction
and the handle extending direction.
(Feature 35)
[0278] The hammering tool according to feature 32 or 33, wherein a
plurality of the battery mount parts are arranged to be aligned in
a cross direction crossing both of the longitudinal direction and
the handle extending direction, and each battery is attached by
moving in a direction parallel to the longitudinal direction.
(Feature 36)
[0279] The hammering tool according to feature 32, wherein two
battery mount parts among the plurality of the battery mount parts
are aligned on a line which extends in a predetermined
direction,
[0280] the battery is attached to one battery mount part among said
two battery mount parts by sliding against the battery engaging
part in a direction close to another battery mount part, and
[0281] the battery is attached to another battery mount part among
said two battery mount parts by sliding against the battery
engaging part in a direction close to one battery mount part.
(Feature 37)
[0282] The hammering tool according to any one of features 32 to
36, wherein the battery is attached to the battery mount part by
sliding against the battery engaging part in a cross direction
crossing both of the longitudinal direction and the handle
extending direction.
(Feature 38)
[0283] The hammering tool according to any one of features 31 to
37, wherein two battery mount parts among the plurality of the
battery mount parts are arranged at mutually separated two points
between which the tool body and/or the handle are/is arranged.
(Feature 39)
[0284] The hammering tool according to any one of features 31 to
38, wherein the motor is arranged such that a rotational axis of
the motor is parallel to the driving axis.
(Feature 40)
[0285] The hammering tool according to feature 39, wherein the
handle comprises a grip portion which is held by a user, and the
grip portion is arranged on a driving axis line.
(Feature 41)
[0286] The hammering tool according to feature 39 or 40, wherein
the handle comprises a grip portion in which its one end side is
connected to the tool body and a reinforcing member which connects
another end side of the grip portion and the tool body, and
[0287] at least one battery mount part among a plurality of the
battery mount parts is arranged on the reinforcing member.
(Feature 42)
[0288] The hammering tool according to any one of features 31 to
37, wherein the motor is arranged such that a rotational axis of
the motor is intersected with the driving axis.
(Feature 43)
[0289] The hammering tool according to any one of features 38 to
42, wherein two battery mount parts among a plurality of the
battery mount parts are arranged respectively at both side of the
tool body in a cross direction crossing both of the longitudinal
direction and the handle extending direction.
(Feature 44)
[0290] A hammering tool which drives a tool bit at least linearly
on a driving axis extending in a predetermined longitudinal
direction, comprising:
[0291] a motor which drives the tool bit,
[0292] a tool body which houses the motor,
[0293] a handle which is connected to the tool body, and
[0294] a mount part to which a battery for providing electric
current to the motor is detachably mounted,
[0295] wherein the handle is provided such that it extends in a
handle extending direction crossing the longitudinal direction,
[0296] the mount part comprises a battery engaging part with which
the battery is engageable and the mount part holds the battery by
engaging the battery with the battery engaging part, and
[0297] the battery is slid in a cross direction crossing both of
the longitudinal direction and the handle extending direction with
respect to the battery engaging part and the battery is mounted to
the mount part.
(Feature 45)
[0298] The hammering tool according to feature 44, wherein the
mount part is provided such that the gravity center of the battery
mounted to the mount part is located on a plane including the
driving axis and a handle central axis which extends in the handle
extending direction.
(Feature 46)
[0299] The hammering tool according to feature 44 or 45, wherein
the mount part comprises a plurality of battery mount parts to
which a plurality of batteries is detachably mounted respectively,
and
[0300] said plurality of battery mount parts is arranged so as to
be aligned in the longitudinal direction.
(Feature 47)
[0301] The hammering tool according to feature 46, further
comprising a partition wall which is arranged between at least two
battery mount parts among said plurality of battery mount parts and
is extended in the handle extending direction,
[0302] wherein a vertical direction is defined by the handle
extending direction, and
[0303] a lower surface of the partition wall is formed flush with a
lower surface of the tool body.
(Feature 48)
[0304] The hammering tool according to feature 46 or 47, wherein
the mount part comprises an even number of the battery mount parts
to which each of an even number of the batteries is detachably
mounted,
[0305] the battery is mounted to a half number of the battery mount
part among said even number of the battery mount parts by sliding
the battery against the battery engaging part in one direction,
and
[0306] the battery is mounted to the rest of a half of the battery
mount part among said even number of the battery mount parts by
sliding the battery against the battery engaging part in a
direction opposite to said one direction.
(Feature 49)
[0307] The hammering tool according any one of features 46 to 48,
wherein the mount part comprises an even number of the battery
mount parts to which each of an even number of the batteries is
detachably mounted, and
[0308] each battery mount parts positioned next to each other are
formed such that the battery is mounted to the battery mount part
by moving in an opposite direction which is opposite to a direction
in which the battery is moved when it is mounted to another battery
mount part next to said battery mount part.
(Feature 50)
[0309] The hammering tool according to any one of features 46 to
49, wherein said plurality of battery mount parts is formed such
that the combined gravity center of a plurality of the batteries
mounted to said plurality of battery mount parts is located on a
plane including the driving axis and a handle central axis which
extends in the handle extending direction.
(Feature 51)
[0310] The hammering tool according to any one of features 44 to
50, wherein the motor is arranged such that a rotational axis of
the motor is intersected with the driving axis.
Correspondence Relationships Between the Constituent Elements of
the Present Embodiments and the Constituent Elements of the Present
Invention
[0311] The correspondence relationships between elements of the
embodiments and elements of the present invention are as follows.
Further, the embodiments describe merely examples of configurations
for carrying out the present invention, and the present invention
is not limited to the configurations of the embodiments.
[0312] The main body 101 is one example of a configuration that
corresponds to "a tool body" of the present invention.
[0313] The hammer bit 119 is one example of a configuration that
corresponds to "a tool bit" of the present invention. The electric
motor 110 is one example of a configuration that corresponds to "a
motor" of the present invention.
[0314] Two battery mount parts 160A, 160B is one example of a
configuration that corresponds to "a plurality of battery mount
parts" of the present invention.
[0315] The battery mount part 160A is one example of a
configuration that corresponds to "a battery mount part" of the
present invention.
[0316] The battery mount part 160B is one example of a
configuration that corresponds to "a battery mount part" of the
present invention.
[0317] The battery pack 170A is one example of a configuration that
corresponds to "a battery" of the present invention.
[0318] The battery pack 170B is one example of a configuration that
corresponds to "a battery" of the present invention.
[0319] The guide rail 161 is one example of a configuration that
corresponds to "a battery engaging part" of the present
invention.
[0320] The engagement part 163 is one example of a configuration
that corresponds to "a battery engaging part" of the present
invention.
[0321] The rubber pin 167 is one example of a configuration that
corresponds to "an elastic member" of the present invention.
[0322] The support member 107 is one example of a configuration
that corresponds to "a reinforcing member" of the present
invention.
DESCRIPTION OF NUMERALS
[0323] 100 hammer drill [0324] 101 main body [0325] 103 motor
housing [0326] 103a upper connection part [0327] 103b lower
connection part [0328] 103c vertical wall [0329] 104 elastomer
[0330] 105 gear housing [0331] 107 support member [0332] 109 hand
grip [0333] 109A grip portion [0334] 109a trigger [0335] 110
electric motor [0336] 111 motor shaft [0337] 119 hammer bit [0338]
120 motion converting mechanism [0339] 121 intermediate shaft
[0340] 123 rotation member [0341] 125 swing member [0342] 127
cylindrical piston [0343] 127a air chamber [0344] 129 cylinder
[0345] 130 controller [0346] 140 hammering mechanism [0347] 143
striker [0348] 145 impact bolt [0349] 150 power transmitting
mechanism [0350] 151 first gear [0351] 153 second gear [0352] 159
tool holder [0353] 160 mount part [0354] 160A battery mount part
[0355] 160B battery mount part [0356] 161 guide rail [0357] 163
engagement part [0358] 165 terminal [0359] 167 rubber pin [0360]
170A battery pack [0361] 170B battery pack [0362] 171 battery case
[0363] 173 mount guide [0364] 175 hook for locking [0365] 177 press
button for unlocking [0366] 179 terminal [0367] 180 cover member
[0368] 181 support shaft [0369] 183 engagement recess [0370] 185
engagement protrusion [0371] 190 additional device mounting
part
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