U.S. patent application number 16/635843 was filed with the patent office on 2020-10-29 for grinding tool, and main component and grinding component thereof.
The applicant listed for this patent is Positec Power Tools (Suzhou) Co., Ltd.. Invention is credited to Shaoshan Ji, Jie Mei, Fu Qian, Yimin SUN, Hongbing Wu, Shisong Zhang, Hongfeng Zhong.
Application Number | 20200338686 16/635843 |
Document ID | / |
Family ID | 1000004969491 |
Filed Date | 2020-10-29 |
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United States Patent
Application |
20200338686 |
Kind Code |
A1 |
SUN; Yimin ; et al. |
October 29, 2020 |
GRINDING TOOL, AND MAIN COMPONENT AND GRINDING COMPONENT
THEREOF
Abstract
A grinding tool comprises: a main component, the main component
comprises a housing, a motor, and an output assembly driven by the
motor to rotate; and a grinding component, detachably connected to
the main component, the grinding component including a grinding
body, and an input assembly rotating relative to the grinding body.
The main component comprises a first connector, the input assembly
includes a second connector, and the first connector is operably
movable relative to the second connector to enable the first
connector to be joined to the second connector. So that the output
assembly is capable of driving the input assembly to drive the body
to move. The grinding tool is simple in structure and easy to
operate. The application further discloses a main component of a
grinding tool and a grinding component of a grinding tool.
Inventors: |
SUN; Yimin; (Jiangsu,
CN) ; Qian; Fu; (Jiangsu, CN) ; Zhang;
Shisong; (Jiangsu, CN) ; Zhong; Hongfeng;
(Jiangsu, CN) ; Wu; Hongbing; (Jiangsu, CN)
; Ji; Shaoshan; (Jiangsu, CN) ; Mei; Jie;
(Jiangsu, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Positec Power Tools (Suzhou) Co., Ltd. |
Suzhou |
|
CN |
|
|
Family ID: |
1000004969491 |
Appl. No.: |
16/635843 |
Filed: |
August 6, 2018 |
PCT Filed: |
August 6, 2018 |
PCT NO: |
PCT/CN2018/099070 |
371 Date: |
July 13, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B24B 23/028
20130101 |
International
Class: |
B24B 23/02 20060101
B24B023/02 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 4, 2017 |
CN |
201710661162.3 |
Jan 15, 2018 |
CN |
201810034934.5 |
Claims
1-25. (canceled)
26. A grinding tool, comprising: a main component comprises a
housing, a motor disposed in the housing, and an output assembly
being rotatably driven by the motor; and a grinding component
detachably connected to an underside of the main component, the
grinding component comprises a grinding body and an input assembly
located on the grinding body, the input assembly is rotatable
around a first pivot axis relative to the grinding body; wherein
the main component further comprises a first connecting member with
a first joining portion movably relative to the housing, the input
assembly comprises a second joining portion for cooperating with
the first joining portion and an eccentric portion with a central
axis parallel to and spaced apart the first pivot axis; the first
connecting member being configured to be operably movable relative
to the input assembly to make the first joining portion connect
with the second joining portion, so that the grinding component is
connected to the underside of the main component and is movably
driven by the motor relative to the housing.
27. The grinding tool according to claim 26, wherein the grinding
tool further comprises a locking mechanism configured to lock the
input assembly relative to the housing.
28. The grinding tool according to claim 27, wherein the locking
mechanism comprises a first locking member non-rotatably movable
relative to the housing, and a second locking member configured to
fixed relative to the input assembly during the connection of the
grinding component to the main component, the first locking member
is movable between a first position being separated from the second
locking member and a second position being engaged with the second
locking member so as to lock the input assembly relative to the
housing.
29. The grinding tool according to claim 28, wherein the main
component further comprises an operating member configured to be
operably switched between an open state and a closed state, when
the operating member is in the closed state, the first locking
member is separated from the second locking member; when the
operating member is in the open state, the first locking member is
movable from the first position to the second position and the
operating member is operable to drive the first connecting member
to rotate relative to the input assembly to make the first joining
portion connect with the second joining portion.
30. The grinding tool according to claim 26, wherein the main
component further comprises a hollow shaft surrounding the first
connecting member, the hollow shaft is configured to be fixed
relative to the output assembly so as to rotate with the output
assembly; the hollow shaft comprises a first support portion at a
first end, and the input assembly comprises a second support
portion at a second end, the second support portion is configured
to engage with the first support portion for central positioning of
the main component and grinding component.
31. The grinding tool according to claim 30, the output assembly
comprises a plurality of first ratchet splines circumferentially
distributed on the hollow shaft, the input assembly comprises a
plurality of second ratchet splines configured to mesh with the
first ratchet splines for transmitting rotation of the output
assembly.
32. The grinding tool according to claim 26, wherein the first
joining portion comprises external thread located on the first
connecting member, the second joining portion comprises internal
thread located in a mounting hole of the input assembly.
33. The grinding tool according to claim 26, wherein the output
assembly further comprises a first driving wheel arranged coaxially
with the rotation axis of the motor, and a second driving wheel
driven by the first driving wheel, the rotation axis of the first
driving wheel is parallel to and spaced from the rotation axis of
the second driving wheel, the input assembly connect with the
second driving wheel.
34. The grinding tool according to claim 33, wherein the main
component further comprises a first fan arranged below and coaxial
with the motor, and a second fan arranged below the second driving
wheel.
35. The grinding tool according to claim 34, wherein the housing
comprises at least one air inlet and at least one air outlet, the
at least one air inlet is located at an upper end of the housing
and away from the grinding component, the air outlet is located
close to the second fan, air flows into the housing from the air
inlet under the action of the first fan and through the motor, and
flows out from the air outlet under the action of the second
fan.
36. A main component of a grinding tool, configured to be
detachably connected to an underside of a grinding component of the
grinding tool, the main component comprises: a housing; a motor
disposed in the housing and configured to provide a rotary power;
and an output assembly configured to be driven by the motor to
transmit the rotary power to an input assembly of the grinding
component; wherein the main component further comprising a first
connecting member movably disposed on the housing, the first
connecting member is configured to join with the input assembly and
driven by the output assembly to rotate relative to the housing
when the grinding component is installed on the main component.
37. The main component according to claim 36, wherein the main
component further comprises a hollow shaft sheathing over the first
connecting member, the output assembly fixed relative to the hollow
shaft, the hollow shaft is rotatable relative to the housing when
the output component driven by the motor.
38. The main component according to claim 37, wherein the first
connecting member is configured movable relative to the hollow
shaft during the installation of the grinding component to the
underside of the main component.
39. The main component according to claim 37, wherein the first
connecting member comprises an lower end with external thread
extends out of the hollow shaft, the input assembly comprises a
threaded hole with internal thread, the lower end of the first
connecting member is configured to engaged with the threaded hole
of the input assembly when the first connecting member rotates
relative to the housing.
40. The main component according to claim 37, wherein the output
assembly comprises a plurality of ratchet splines circumferentially
distributed on the hollow shaft, the input assembly comprises a
plurality of second ratchet splines configured to mesh with the
first ratchet splines for transmitting the rotation of the output
assembly.
41. The main component according to claim 36, wherein the main
component further comprises a locking mechanism configured to
operably switched between a locked state and an unlocked state,
when the locking mechanism in the locked state, the locking
mechanism prevent the hollow shaft from rotating relative to the
housing, when the locking mechanism in the unlocked state, the
hollow shaft is released by the locking mechanism so as to rotate
relative to the housing.
42. A grinding component of a grinding tool, configured to be
detachably joined to a main component of the grinding tool, the
grinding component comprising: a grinding body; an input assembly
located on the grinding body, the input assembly is configured to
connect with an output assembly of the main component to drive the
grinding component moving relative to the main component, wherein
the input assembly is rotatable around a first pivot axis relative
to the grinding body, the input assembly comprises a second joining
portion and an eccentric portion having a centre axis parallel to
and spaced apart the first pivot axis, the second joining portion
is configured to connect with a first connecting member of the main
component so as to connect the grinding component to the main
component of the grinding tool.
43. The grinding component according to claim 42, wherein the
second joining portion comprises a mounting hole with internal
thread, the input assembly further comprising a second support
portion being configured as a groove coaxial with the mounting
hole, the outer diameter of the groove is greater than an outer
diameter of the mounting hole.
44. The grinding component according to claim 43, wherein the
groove, the mounting hole and the first pivot axis are
collinear.
45. The grinding component according to claim 44, wherein the input
assembly further comprises a plurality of ratchet splines disposed
on the periphery of the second support portion for transmitting
torque in cooperation with the output assembly.
Description
[0001] This application is a National Stage application of
International Application No. PCT/CN2018/099070 filed Aug. 6, 2018,
and claims priority to Chinese Application Nos. 201710661162.3
filed Aug. 4, 2017 and 201810034934.5 filed Jan. 15, 2018, each of
which are hereby incorporated by reference in their entirety as if
fully set forth herein.
BACKGROUND
Technical Field
[0002] The present invention relates to a handheld power tool, and
in particular, to a grinder having multiple grinding components
(platens) that can be selectively attached to a commom main
component.
Related Art
[0003] Grinder, according to its grinding components, typically
include a circular grinder whose grinding component having a
circular plate body, and a non-circular grinder whose grinding
component having a noncircular plate body. An output shaft of the
circular grinder drives a grinding component to make a random-orbit
movement composed by a regular eccentric swinging and an irregular
rotation. The circular sander is configured to sand a larger
quantity of material, for example, is used for rough grinding. For
the non-circular grinder, the irregular rotation of the grinding
component is limited. Therefore, the grinding component only has
its regular eccentric swinging. The non-circular grinder is
configured to sand a little quantity of material, for example, is
used for detail grinding.
[0004] When the grinding component moves, different kinds of shape
can adapt to different perating conditions. For example, a
rectangular shape grinding component can be used for sanding under
normal operating conditions. A triangular shape grinding component
is obviously more advantageous when sanding a working surface in a
corner area. A special-shaped grinding component with a finger
shape is more suitable for sanding a working surface with a narrow
area.
[0005] A sander adaptable to various operating conditions brings
convenience to users and therefore becomes widely popular in the
market. The various operating conditions herein include operating
condition requirements of detail sanding and rough sanding, or
different base shapes can meet operating conditions in different
sanding areas. The sander adaptable to various operating conditions
is referred to as a multifunctional grinder below.
[0006] For the multifunctional grinder, to obtain a plurality of
functions, it is a common way to change its grinding components.
When a circular grinding component is mounted to the main component
of the grinder, the base makes a random orbital movement including
a regular eccentric swinging and a non-irregular rotation without
being restricted by a swing foot. When a non-circular grinding
component is mounted to the main component of the grinder, the base
is restricted by the swing foot and makes an orbital movement
including only a revolution. The multifunctional grinder can meet
different sanding areas by changing different shaped grinding
components with a base replacement structure.
[0007] Chinese Patent Application CN103506923A and U.S. Pat. No.
8,821,220B disclose abase replacement structure. In U.S. Pat. No.
8,821,220B, a grinder component includes a base body used to mount
sandpaper and an input assembly that is located in the base body
and driven by a motor and can rotate relative to the base body. The
grinder component and the main component are axially locked along
an axis of the motor by a connecting mechanism. The connecting
mechanism includes a special-shaped locking steel wire located in
the main component and a clamping slot corresponding to the
special-shaped locking steel wire is located in the grinding
component. Because the locking steel wire and the clamping slot of
the connecting mechanism are non-rotatable, a torque transfer
mechanism is used between the main component and grinding component
for torque transferring. The base body and the input assembly are
moving during work, so that the grinding component also needs to
include a fixed substrate housing in which the clamping slot is
provided. Therefore, for the grinding component, a bearing needs to
be disposed between the base body and the input assembly, and
another bearing needs to be disposed between the substrate housing
and the input assembly, so that the input assembly can move
relative to the substrate body. This base replacement structure
makes the structure of the grinding component complex and
costly.
[0008] Based on the current state of the prior art, it is necessary
to improve a base replacement structure of a multifunctional sander
to overcome the problems in the prior art.
SUMMARY
[0009] The present invention provides a grinding tool having a
simple and convenient base replacement structure.
[0010] A technical solution provided in the present invention is as
follows: A grinding tool, comprising: a main component, the main
component comprising a housing, a motor disposed in the housing,
and an output assembly driven by the motor to rotate; and a
grinding component, detachably connected to the main component,
comprising a grinding body and an input assembly and can rotate
around a first pivot axis relative to the grinding body, wherein
the main component further comprises a first connecting member that
is movably disposed relative to the housing, the input assembly
comprises a second connecting member and an eccentric element whose
central axis is paralle relative to the first pivot axis, the
grinding body is connected to the eccentric element, and the first
connecting member is operably movable relative to the second
connecting member to enable the first connecting member to be
joined to the second connecting member, so that the output assembly
is capable of driving the input assembly to rotate around the first
pivot axis to drive the grinding body to work.
[0011] Preferably, when the first connecting member is joined to
the second connecting member, the grinding component is inseparable
from the main component in the axial direction.
[0012] Preferably, the grinding tool further includes a locking
mechanism, and the locking mechanism is capable of fastening the
second connecting member relative to the housing.
[0013] Preferably, the locking mechanism includes a first locking
member movable between a locked position and a released position
relative to the housing, and a second locking member, the second
locking member and the second connecting member being non-rotatable
relative to each other; when the first locking member is in the
locked position, the first locking member is joined to the second
locking member, and the second connecting member is fixed relative
to the housing; and when the first locking member is in the
released position, the first locking member is separate from the
second locking member, and the second connecting member is
rotatable relative to the housing.
[0014] Preferably, the first locking member is located in the main
component, and the second locking member is located in the grinding
component.
[0015] Preferably, the first connecting member includes a first
support portion, and the second connecting member includes a second
support portion used to be joined to the first support portion.
[0016] Preferably, a hollow shaft is disposed on an outer side of
the first connecting member, the hollow shaft is fixedly disposed
relative to the output assembly, a first support portion is
disposed at an end, close to the grinding component, of the hollow
shaft, and the second connecting member includes a second support
portion used to be joined to the first support portion.
[0017] Preferably, the second support portion is disposed to be a
groove, and an outer diameter of the first support portion matches
an inner diameter of the groove.
[0018] Preferably, the central axis of the first support portion is
collinear with the first pivot axis.
[0019] Preferably, the first connecting member is provided with a
first joining portion, and the second connecting member includes a
second joining portion used to be joined to the first joining
portion.
[0020] Preferably, the first joining portion is provided with an
external thread, the second joining portion is disposed to be a
mounting hole, and the mounting hole is provided with an internal
thread that matches the external thread.
[0021] Preferably, the central axis of the first joining portion is
collinear with the first pivot axis.
[0022] Preferably, the output assembly includes an output portion,
the input assembly includes an input portion used to be joined to
the output portion, and when the first connecting member is joined
to the second connecting member, the output portion is joined to
the input portion to transfer the rotation of the motor to the
input assembly.
[0023] Preferably, the input portion includes a plurality of second
ratchet splines distributed circumferentially, and the output
portion includes a plurality of first ratchet splines meshing with
the second ratchet splines.
[0024] Preferably, the pivot axis of the first connecting member is
collinear with the first pivot axis.
[0025] Preferably, the main component includes an elastic swing
foot fixedly disposed relative to the housing, and the grinding
component is provided with a limiting foot joined to the elastic
swing foot.
[0026] Preferably, the output assembly includes a first driving
wheel driven by the motor and a second driving wheel driven by the
first driving wheel, and the pivot axis of the first driving wheel
is parallel to and spaced from the pivot axis of the second driving
wheel.
[0027] Preferably, the grinding tool further includes a second fan,
the second fan and the second driving wheel being fixedly disposed
relative to each other, and a first fan that is coaxial with the
motor and is located at an end, close to the grinding component, of
the motor.
[0028] Preferably, the housing is provided with at least one air
inlet and at least one air outlet, the air inlet is located at an
end, away from the grinding component, of the motor, the air outlet
is disposed close to the second fan, and an external airflow flows
into the housing from the air inlet under the action of the first
fan and then flows through the motor, and flows out of the air
outlet under the action of the second fan.
[0029] The technical solution is used in the present invention,
thereby simplifying the structure of the grinding component, and
facilitating the disassembly and assembly between the grinding
component and the main component.
[0030] The present invention further provides a main component that
facilitates the disassembly and assembly of a grinding
component.
[0031] A technical solution provided in the present invention is as
follows: A main component of a grinding tool is used to be
connected to a detachable grinding component of the grinding tool.
The main component includes: a housing; a motor, accommodated in
the housing, and configured to provide rotary power; and an output
assembly, capable of being driven by the motor to rotate relative
to the housing, where the main component further includes a first
connecting member movably disposed on the housing, and the first
connecting member is used to be joined to the grinding component
and is capable of being driven by the output assembly to rotate
relative to the housing.
[0032] Preferably, the first connecting member includes a first
joining portion, and the first joining portion is provided with an
external thread.
[0033] Preferably, the main component further includes a hollow
shaft sleeved over the first connecting member, and the first
connecting member is operably movable relative to the hollow
shaft.
[0034] Preferably, the output assembly includes an output portion,
and the output portion is fixedly connected to the hollow
shaft.
[0035] Preferably, the main component further includes a locking
mechanism, the locking mechanism has a locked state and an unlocked
state, the locking mechanism is capable of preventing the hollow
shaft from rotating relative to the housing when the locking
mechanism is in the locked state, and the hollow shaft is rotatable
relative to the housing when the locking mechanism is in unlocked
state.
[0036] Preferably, the main component further includes an operating
mechanism, and the operating mechanism includes an operating member
that is capable of controlling the locking mechanism to switch
between the locked state and the unlocked state.
[0037] Preferably, the operating member is capable of switching
between a first position and a second position, the operating
member at least partially protrudes from the housing when being in
the first position, and the operating member does not protrude from
an outer contour of the housing when being in the second
position.
[0038] Preferably, when the operating member switches to the first
position, the locking mechanism switches to the locked state, and
when the operating member switches to the second position, the
locking mechanism switches to the unlocked state.
[0039] Preferably, the locking mechanism includes a first locking
member fixedly disposed relative to the hollow shaft, a second
locking member fixedly disposed relative to the housing, and a
first elastic member disposed between the housing and the second
locking member; when the operating member is in the first position,
the first elastic member is in a released state, and the first
locking member is joined to the second locking member; and when the
operating member is in the second position, the operating member
abuts against the second locking member to enable the elastic
element to be in a compressed state, and the first locking member
is separate from the second locking member.
[0040] Preferably, the first connecting member includes a
transmission element, and the operating member operably drives the
first connecting member to move through the transmission
element.
[0041] Preferably, the operating mechanism further includes a seat
rotatable around a second pivot axis relative to the housing, the
operating member is capable of pivoting between a first operation
position and a second operation position relative to the seat, when
the operating member is in the first operation position, the
operating member is separate from the transmission element, and
when the operating member is in the second operation position, the
operating member is joined to the transmission element, so as to
drive the first connecting member to rotate around the second pivot
axis.
[0042] Preferably, the output assembly includes an output portion,
and the output portion is rotatable around a third pivot axis and
includes a plurality of ratchets circumferentially distributed
around the third pivot axis.
[0043] Preferably, the third pivot axis is parallel to and spaced
from an axis of the motor.
[0044] Preferably, the housing is provided with a holding handle
extending at an angle to the axis of the motor, and the axis of the
motor and the holding handle are separately located on two opposite
sides of the third pivot axis.
[0045] Preferably, the output assembly includes an output shaft,
and the output shaft is coaxially disposed with and fixedly
connected to the first connecting member.
[0046] Preferably, the main component further includes two pairs of
limiting feet, each pair of limiting feet being disposed
diagonally.
[0047] The present invention further provides a grinding component
that is easily joined to a main component of a grinding tool.
[0048] A technical solution provided in the present invention is as
follows: A grinding component of a grinding tool is used to be
detachably joined to a main component of the grinding tool. The
grinding component includes: a grinding body; an input assembly
accommodated at least partially in the grinding body, where the
input assembly is rotatable around a first pivot axis relative to
the grinding body, the input assembly includes an eccentric
element, the centre axis of the eccentric element is eccentrically
disposed relative to the first pivot axis, the body is connected to
the eccentric element, the input assembly further includes a second
connecting member, the second connecting member and the eccentric
element being fixedly disposed relative to each other, and the
second connecting member is capable of being joined to the main
component.
[0049] Preferably, the grinding body includes a cover body sleeved
on an outer side of the second connecting member and a plate body
axially fixed to the cover body and located below the cover body,
the plate body is used to mount a sanding element, and the second
connecting member includes a second joining portion and a second
support portion connected to the second joining portion.
[0050] Preferably, the second joining portion is disposed to be a
mounting hole extending in a pivot axis direction, the second
support portion is disposed to be a groove extending in the pivot
axis direction, and a lower end of the mounting hole is closer to
the plate body than a lower end of the groove.
[0051] Preferably, the second connecting member includes a mounting
hole extending in a first pivot axis direction, and the mounting
hole is provided with an internal thread.
[0052] Preferably, the second connecting member further includes a
groove extending in the first pivot axis direction, and the groove
is in communication with the mounting hole.
[0053] Preferably, an outer diameter of the groove is greater than
an outer diameter of the mounting hole.
[0054] Preferably, a ratio of an axial size and an outer diameter
size of the second support portion is between 0.33 and 1.7.
[0055] Preferably, a central axis of the groove and a central axis
of the mounting hole are collinear with the first pivot axis.
[0056] Preferably, the input assembly further includes an input
portion configured to transfer torque, and the input portion is
fixedly disposed relative to the second connecting member.
[0057] Preferably, the output portion includes a plurality of
ratchets circumferentially distributed around the first pivot
axis.
[0058] Preferably, the input assembly further includes a
counterbalance, a central axis of the eccentric element is located
on one side of the first pivot axis, and the counterbalance is
located on the other side, opposite to the central axis, of the
first pivot axis.
[0059] Preferably, the counterbalance is located at an end, away
from the input portion, of the eccentric element.
[0060] Preferably, the body includes a cover body sleeved on an
outer side of the second connecting member and a plate body axially
fixed to the cover body, the plate body is used to mount a sanding
element, and the plate body may be disposed to be circular,
rectangular, or irregularly shaped.
BRIEF DESCRIPTION OF THE DRAWINGS
[0061] FIG. 1 is a schematic diagram of an operating member being
in a closed state according to a first implementation of the
present invention.
[0062] FIG. 2 is a schematic structural diagram of a joint between
a main component and a grinding component according to the first
implementation of the present invention.
[0063] FIG. 3 is a partially enlarged view of a part A in FIG.
1.
[0064] FIG. 4 is a schematic diagram of an operating member being
in an open state according to the first implementation of the
present invention.
[0065] FIG. 5 is a partially enlarged view of a part C in FIG.
1.
[0066] FIG. 6 is a schematic diagram of an input assembly abutting
against a large end face according to the first implementation of
the present invention.
[0067] FIG. 7 is a partially enlarged view of a part B in FIG. 1 of
the present invention.
[0068] FIG. 8 is a schematic diagram of an internal air-duct
direction of a grinding tool according to the first implementation
of the present invention.
[0069] FIG. 9 is a schematic diagram of a positional relationship
between a grinding component and an elastic element according to
the first implementation of the present invention.
[0070] FIG. 10 is a schematic structural diagram of a limiting
mechanism according to the first implementation of the present
invention.
[0071] FIG. 11 is a sectional view of a joint position between a
limiting post and a limiting hole according to the first
implementation of the present invention.
[0072] FIG. 12 is a schematic structural diagram of a limiting
mechanism according to another implementation of the present
invention.
[0073] FIG. 13 is a schematic diagram of a grinding component that
is joined to a limiting mechanism according to another
implementation of the present invention.
[0074] FIG. 14 is a partial sectional view of a grinding component
being joined to a limiting mechanism according to another
implementation of the present invention.
[0075] FIG. 15 is a schematic diagram of an internal structure of a
grinding tool according to the first implementation of the present
invention.
[0076] FIG. 16 is a schematic diagram of a locking mechanism
according to the first implementation of the present invention.
[0077] FIG. 17 is a schematic diagram of an operating mechanism
when an operating member is in a closed state according to the
present invention.
[0078] FIG. 18 is a schematic diagram of an operating mechanism
when an operating member is in an operating state according to the
present invention.
[0079] FIG. 19 is a schematic diagram of an external wind direction
of a grinding tool according to the first implementation of the
present invention.
[0080] FIG. 20 is a schematic diagram of an external wind direction
of a grinding tool according to a second implementation of the
present invention.
[0081] FIG. 21 is a schematic diagram of an internal air-duct
direction of a grinding tool according to the second implementation
of the present invention.
[0082] FIG. 22 is a sectional view of a main component being not
joined to a grinding component of a grinding tool according to the
second implementation of the present invention.
[0083] FIG. 23 is a sectional view of a main component being joined
to a grinding component of a grinding tool according to the second
implementation of the present invention.
[0084] FIG. 24 is a partially enlarged view of a part D in FIG.
22.
[0085] FIG. 25 is a schematic structural diagram of a locking
mechanism according to the second implementation of the present
invention.
[0086] FIG. 26 is a schematic structural diagram of a locking
mechanism being in a locked state in a grinding tool according to a
third implementation of the present invention.
[0087] FIG. 27 is a schematic structural diagram of a locking
mechanism being in an unlocked state in a grinding tool according
to the third implementation of the present invention.
[0088] FIG. 28 is a schematic diagram of a main component being not
joined to a grinding component of a grinding tool according to a
fourth implementation of the present invention.
[0089] FIG. 29 is a sectional view taken along a direction F-F in
FIG. 28.
[0090] FIG. 30 is a sectional view of a locking mechanism being in
an unlocked state according to a fifth implementation of the
present invention.
[0091] FIG. 31 is a sectional view of a locking mechanism being in
a locked state according to the fifth implementation of the present
invention.
[0092] FIG. 32 is a sectional view of an operating member being
disconnected from a first connecting member according to a sixth
implementation of the present invention.
[0093] FIG. 33 is a sectional view of an operating member being
connected to a first connecting member according to the sixth
implementation of the present invention.
DETAILED DESCRIPTION
[0094] The following will describe some exemplary embodiments more
fully with reference to the accompanying drawings. The same
reference numerals indicate the same components throughout the
accompanying drawings.
[0095] Referring to FIG. 1 to FIG. 3, the reference numeral 10
indicates a general and exemplary handheld tool. A grinder 10 is
used as an exemplary handheld power tool for description below. The
grinder 10 includes a main component 11 and a grinding component
12. The main component 11 includes a housing 110, a motor 112
disposed inside the housing 110, and an output assembly 113 driven
by the motor 112 to rotate. The grinding component 12 includes a
grinding body 120 and an input assembly 121 located on the grinding
body 120. A side, facing a to-be-treated working surface, of the
grinding body 120 may be equipped with a sanding element (for
example, sandpaper). The input assembly 121 can be driven by the
output assembly 113 to rotate relative to the grinding body 120, to
drive the grinding body 120 to work. To implement the inseparable
connection between the grinding component 12 and the main component
11 in the axial direction of the motor 112, the main component 11
further includes a first connecting member 114. The grinding
component 12 includes a second connecting member 122 that
cooperates with the first connecting member 114. When the first
connecting member 114 is joined to the second connecting member 122
to make the grinding component 12 inseparably connected to the main
component 11 in the axial direction of the motor 112, the first
connecting member 114 and the second connecting member 122 may
rotate with the input assembly 121. For a reliable and stable
connection between the first connecting member 114 and the second
connecting member 122, preferably, the first connecting member 114
and the second connecting member 122 connects to each other through
thread.
[0096] In this embodiment, the output assembly 113 includes a first
driving wheel 1131 disposed coaxially with the motor 112 and driven
by the motor 112 to rotate, and a second driving wheel 1132 driven
by the first driving wheel 1131 and having a pivot axis spaced from
that of the first driving wheel 1131. To reduce the noise and
vibration generated by the first driving wheel 1131 and the second
driving wheel 1132 during torque transmission, preferably, a
transmission belt is used to transfer power between the first
driving wheel 1131 and the second driving wheel 1132. In this
embodiment, for a better support of the second driving wheel 1132,
the main component 11 further includes a connecting shaft 115
disposed inside the housing 110, and the second driving wheel 1132
is sleeved on an outer side of the connecting shaft 115 to enable
the connecting shaft 115 to support the second driving wheel 1132.
In this embodiment, the second driving wheel 1132 is fixedly
sleeved on an outer side of the connecting shaft 115 to drive the
connecting shaft 115 to rotate, and the connecting shaft 115 is
rotatably disposed on the housing 110 through a support bearing
116. It can be understood that, in other embodiments, the
connecting shaft 115 may be fixedly connected to the housing 110,
that is, may be non-rotatably fixed to the housing 110, and the
second driving wheel 1132 is disposed to be rotatably connected to
the connecting shaft 115 to enable the connecting shaft 115 to
support the second driving wheel 1132. To transfer the output
torque of the output assembly 113 to the input assembly 121,
preferably, the output assembly 113 further includes an output
portion 1133 fixedly connected to the second driving wheel 1132,
and the input assembly 121 includes an input portion 1210 that can
cooperates with the output portion 1133. In one embodiment, one of
the output portion 1133 and the input portion 1210 includes a
plurality of male splines, the other one includes a plurality of
female splines that receive the male splines. In other embodiments,
the output portion 1133 and the input portion 1210 may be disposed
to have other forms that can transfer torque, for example, each of
the output portion 1133 and the input portion 1210 having a
rectangular cross section. The output assembly 113 transfers torque
to the input assembly 121 to drive the input assembly 121 to rotate
relative to the grinding body 120.
[0097] It can be understood that, in other embodiments, the output
portion 1133 may be disposed on an outer side of the connecting
shaft 115, the second driving wheel 1132 drives the connecting
shaft 115 to rotate, and the connecting shaft 115 then drives the
output portion 1133 to rotate. That is, the connecting shaft 115,
as a part of the output assembly 113, is used as a drive shaft for
driving the output portion 1133.
[0098] Continue to refer to FIG. 1. The input assembly 121 is at
least partially disposed to be an eccentric element 124 in an axial
direction, and the central axis X1 of the eccentric element 124 is
spaced from the pivot axis X0 of the input assembly 121, that is,
there is an eccentric distance e between the central axis X1 and
the pivot axis X0 of the eccentric element 124. The grinding body
120 includes a plate body 1202 used to mount sandpaper and a cover
body 1201 fixedly connected to the plate body 1202. The cover body
1201 is disposed on an outer side of the eccentric element 124 by a
mounting bearing 123, so that the eccentric element 124 rotates to
drive the grinding body 120 to move. It can be easily understood
that, because the pivot axis X0 (that is, the pivot axis X0 of the
input assembly) of the eccentric element 124 is spaced from the
central axis X1 of the eccentric element 124, that is, the mass of
the eccentric element 124 is asymmetrically distributed relative to
its pivot axis X0, the eccentric element 124 tends to shake during
rotation. To compensate for the mass imbalance of the eccentric
element 124 during rotation relative to its pivot axis X0, the
input assembly 121 further includes a counterbalance 1211. The
central axis of the eccentric element 124 is located on one side of
the pivot axis X0 of the input assembly, and the counterbalance
1211 is located on the other side, opposite to the central axis, of
the pivot axis X0. It can be understood that, the grinding
components 12 with different shapes of plate body 1202, for
example, a grinding component 12 with a circular plate body 1202, a
grinding component 12 with a non-circular plate body 1202, they
have different eccentric distances e due to different working
conditions. Therefore, the mass of the counterbalance 1211 required
for compensating for the eccentric element 124 of different
grinding components also varies. In this embodiment, the
counterbalance 1211 is disposed in the sanding component, so that
different grinding component (for example, a sanding component with
a circular plate body, or a grinding component with a non-circular
plate body) can have independent counterbalances 1211, to achieve
the optimal vibration reduction effect. It can be understood that,
the counterbalance 1211 may be disposed below the mounting bearing
123 or may be located above the mounting bearing 123 or may be
located both below and above the mounting bearing 123.
[0099] Referring to FIG. 1, FIG. 2, FIG. 5, and FIG. 6, in this
embodiment, the first connecting member 114 includes a first
joining portion 1141 that is located below the first connecting
member 114 and is used to be connected to the second connecting
member 122. Preferably, the first joining portion 1141 is provided
with an external thread 1140, and the second connecting member 122
includes a second joining portion 1221 joined to the first joining
portion 1141. Preferably, the second joining portion 1221 is
disposed to be a mounting hole that can accommodate the first
joining portion 1141. At least part of the inner circumferential
surface of the mounting hole is provided with an internal thread
1220 that matches the external thread 1140. In this embodiment, the
connecting shaft 115 is a hollow shaft, the first connecting member
114 is located at least partially within the hollow shaft 115, and
to prevent the first connecting member 114 from falling out of the
hollow shaft, the upper end of the first connecting member 114 is
provided with a flange 1142. In this embodiment, to ensure the
coaxiality of the main component 11 and the grinding component 12,
that is, the coaxiality of the first connecting member 114 and the
pivot axis of the input assembly 121, and the coaxiality of the
connecting shaft 115 to reduce the vibration of the grinder 10 at
work, the second connecting member 122 further includes a second
support portion 1222. Preferably, the second support portion 1222
is disposed to be a groove extending in the pivot axis direction,
and a first support portion 1152 used to protrude into the groove
having an outer diameter substantially the same as that of the
groove of the second support portion is formed below the connecting
shaft 115. A length of the connecting shaft 115 extending into the
mounting hole is L1, that is, the axial size of the first support
portion 1152 is L1, and L1 ranges from 4 mm to 30 mm. Preferably,
L1 ranges from 11.25 mm to 13.75 mm. More preferably, L1 is 12.5
mm. The first support portion 1152 and the second support portion
1222 (the groove) are joined to each other with little spacing,
that is, an outer diameter of the first support portion 1152 is
substantially the same as that of the second support portion 1222
(the groove), and the outer diameter is referred to as a joining
diameter D1 for short below. The joining diameter D1 ranges from 7
mm to 12 mm. Preferably, the joining diameter D1 ranges from 8.55
mm to 10.45 mm. More preferably, the joining diameter D1 is 9.5
mm.
[0100] It can be easily understood that, in a case that the joining
diameter D1 is a specific value, if the joining length L1 is
larger, the joining effect is better, that is, the coaxiality is
better. However, if L1 is greater, the entire machine is higher.
Referring to FIG. 6, in this embodiment, to ensure the desirable
coaxiality of the entire machine when the joining length is
smaller, the main component 11 is provided with an abutting end
face that abuts against an upper end face of the input assembly
121, and a diameter D2 of the abutting end face is greater than D1.
In this embodiment, the abutting end face is an end face on which
the second driving wheel 1132 abuts against the input assembly 121.
It can be understood that, in other embodiments, the abutting end
face may be an end face that is fixedly connected to the second
driving wheel 1132 and abuts against the input assembly 121. In
this embodiment, a large end face is used for abutting, and when a
ratio of the joining length L1 to the joining diameter D1 is as
small as 0.33, it can be ensured that the joining length L1 is
short when D1 is a specific value. Certainly, it can be understood
that, while ensuring the large end face, if the ratio of L1/D1 is
greater, the coaxiality is more stable.
[0101] In this embodiment, the grinding component 12 may be a
circular grinding component with a circular plate body, as shown in
FIG. 1, FIG. 2, and FIG. 8, and the grinding component 12 may be a
noncircular grinding component with a non-circular plate body (e.g.
a rectangular plate body), grinding component as shown in FIG. 9,
FIG. 13, and FIG. 15. An operator may choose the circular grinding
component or the noncircular grinding component grinding component
to be joined to the main component 11 according to different
grinding requirements. During grinding, the grinding body 120 of
the circular grinding component not only makes an eccentric
swinging, but also makes a rotation under the action of the
eccentric element 124 due to the mounting bearing 123. That is, the
grinding body 120 of the circular grinding component makes an
orbital movement including a revolution and a rotation. Therefore,
when the operator needs to remove a large amount of sanding
material, the operator may mount the circular grinding component to
the main component 11. In this embodiment, the noncircular grinding
components may have a grinding plate with a rectangular shape, the
size of the grinding plate with the rectangular shape is
substantially the same as one third of the standard sandpaper
specification (a size of 228 mm.times.280 mm) well known in the
grinding field. So we also call the grinding component with this
kind of grinding plate one-third grinding component. The
noncircular grinding components may have a grinding plate with a
foursquare shape, the size of the grinding plate with the
foursquare shape is substantially the same as a quarter of the
standard sandpaper specification (a size of 228 mm.times.280 mm)
well known in the grinding field. So we also call the grinding
component with this kind of grinding plate quarter grinding
component. The noncircular grinding component fixes the sandpaper
to its plate body 1202 through an elastic clamping member, and the
circular grinding component fixes the sandpaper to the plate body
by using felt or other manners. Certainly, it can be understood
that noncircular grinding component may fix the sandpaper by using
felt or other manners.
[0102] It should be noted that, the noncircular plate body 1202 of
the noncircular grinding component (e.g. one-third grinding
component or quarter grinding component) has sharp edges. If the
plate body 1202 of a grinding component makes both a revolution and
a rotation under the action of the input assembly 121, four edges
of the plate body 1202 that rotates at high speed are prone to
cause danger. Therefore, the grinder 10 further includes a limiting
mechanism 117 used for limiting the rotation of the plate body.
[0103] Referring to FIG. 9 to FIG. 14, the limiting mechanism 117
includes a limiting substrate 1170 and a limiting foot 1171
disposed on the limiting substrate 1170. In this embodiment, each
limiting foot 1171 includes a plurality of flexible posts.
Preferably, the number of the flexible posts is an even number.
More preferably, the number of the flexible post is 4 or 6. In this
embodiment, the limiting mechanism 117 is located in the main
component 11. Therefore, a limiting structure does not need to be
separately disposed for each noncircular grinding component or
other grinding component of which the rotation is needed to be
limited. An upper end of the limiting foot 1171 is detachably fixed
to the housing 110, so that the limiting foot 1171 can be replaced
after being damaged due to deformation under a long-time stress.
Preferably, the upper end of the limiting foot 1171 is connected to
the housing by a screw, so that the limiting foot 1171 can be
stably fixed to the housing 110 and is not prone to freely fall off
the housing 110. Referring to FIG. 2, because the upper end of the
limiting mechanism 117 is covered by the housing 110, that is, the
upper end of the limiting foot 1171 is not exposed to the outside
of the housing 110, and a lower end of the limiting mechanism 117
is blocked by the limiting substrate 1170, tools such as a
screwdriver cannot reach the interior of the housing 110, causing
difficulty in the mounting of the limiting mechanism 117. In this
embodiment, the plurality of flexible posts of each limiting foot
1171 are arranged circumferentially to form a hollow through-hole
and the hollow-through hole penetrates the limiting substrate 1170,
so that the operator can screw in the screw through the
through-hole from the bottom of the substrate 1170. A side, away
from the limiting foot 1171, of the limiting substrate 1170 is
provided with a limiting post 1172, and the grinding body 120 of
the grinding component is provided with a limiting hole 1203 to be
joined to the limiting post 1172, to limit the rotation of the
grinding body of the grinding component. Preferably, an elastic
element 900 is disposed between the limiting hole 1203 and the
limiting post 1172. Referring to FIG. 11, the elastic element 900
includes a first elastic member 901 that is located between the
substrate 1170 and the opening of the limiting hole 1203 and is
used to isolate the vibrations of the limiting hole 1203 and the
limiting mechanism 117 in the vertical direction, that is, to
isolate the vibration between the grinding body 120 and the
limiting mechanism 117 in the vertical direction or the axial
direction. The elastic element 900 further includes a second
elastic element 902 that is located between the limiting post 1172
and a side wall of the limiting hole 1203 and is used to isolate
the vibrations of the limiting post 1172 and the limiting hole 1203
in the radial direction, that is, to isolate the vibration between
the grinding body 120 and the limiting mechanism 117 in the radial
direction. Referring to FIG. 9, in this embodiment, because the
grinding component 12 of the grinder 10 may vary (e.g. the circular
grinding component or the non-circular grinding component). Except
for the one-third grinding component and the quarter grinding
component, the plate body of the grinding component needs the
limiting mechanism 117, further includes another grinding component
of which the plate body (also referred to as mouse sandpaper) is
approximately iron-shaped. When each plate body is provided with
four elastic elements, a larger quantity of elastic elements are
required, leading to higher costs. In addition, because the fit
between the elastic element 900 and the limiting hole 1203 is
mostly an interference fit, it is relatively difficult to mount the
elastic element 900 into the limiting hole 1203. Therefore, if the
quantity of the elastic element 900 to be mounted is larger, the
assembly is more difficult.
[0104] Referring to FIG. 12 to FIG. 14, the present invention
further provides a limiting mechanism 117' having another
structure. Same as the limiting mechanism 117 in the above
embodiment, the limiting mechanism 117' includes a limiting
substrate 1170' and a limiting foot 1171' disposed on the limiting
substrate 1170', each limiting foot 1171' includes a plurality of
flexible posts, the limiting mechanism 117' is detachably fixed to
the housing 110 of the main component 11 by a screw, and the
plurality of flexible posts of each limiting foot 1171' are
arranged circumferentially to form a hollow through-hole and the
through-hole penetrates the limiting substrate 1170'. A difference
from the above embodiment is that, in this embodiment, a limiting
post 1172' is disposed in the plate body, the hollow through-hole
formed by the plurality of flexible posts of the limiting foot
1171' is a limiting hole 1203', and an elastic element 900' is
disposed at an end, close to the limiting substrate 1170', of the
hollow through hole. Referring to FIG. 14, similar to the structure
of the elastic element 900 in the above embodiment, the elastic
element 900' in this embodiment includes a first elastic member
901' that is located between the grinding body 120 and an opening
of the limiting hole 1203' and is used to isolate the vibrations of
the grinding body 120 and the limiting mechanism 117' in the
vertical direction. The elastic element 900' further includes a
second elastic element 902' that is located between the limiting
post 1172' and a side wall of the limiting hole 1203' and is used
to isolate the vibrations of the limiting post 1172' and the
limiting hole 1203' in the radial direction, that is, to isolate
the vibration between the grinding body 120 and the limiting
mechanism 117' in the radial direction.
[0105] Referring to FIG. 1, when the grinding component 12 is
connected to the main component 11 or is detached from the main
component 11, the first connecting member 114 is required to rotate
relative to the second connecting member 122. However, it can be
learned from the above description of the structure of the main
component 11 and the grinding component 12 that, when the first
connecting member 114 rotates under the operation, the external
thread 1140 of the first joining portion 1141 interacts with the
internal thread 1220 of the second joining portion 1221, to enable
the input assembly 121 to rotate together. The input assembly 121
further drives the output assembly 113 and the connecting shaft 115
to rotate through the input portion 1210 and the output portion
1133. As a result, a threaded rod 1140 and the mounting hole cannot
rotate relative to each other, and the external thread 1140 of the
first joining portion 1141 and the internal thread 1220 of the
second joining portion 1221 cannot be tightened or loosened.
Referring to FIG. 1, FIG. 15, and FIG. 16, the grinder 10 in the
present invention further includes a locking mechanism 118, and the
locking mechanism 118 can implement the circumferential locking of
the input assembly 121 to enable the first connecting member 114 to
rotate relative to the second connecting member 122. Preferably,
the locking mechanism 118 is disposed in the main component 11. The
locking mechanism 118 has a locked state and an unlocked state.
When the locking mechanism 118 is in the locked state, the locking
mechanism 118 circumferentially locks the input assembly 121, that
is, the input assembly 121 cannot rotate relative to the housing
110. When the locking mechanism 118 is in the unlocked state, the
locking mechanism 118 releases the circumferential locking of the
input assembly 121, that is, the input assembly 121 can rotate
relative to the housing 110.
[0106] Referring to FIG. 1 and FIG. 16, in this embodiment, to
facilitate to lock the input assembly 121, the locking mechanism
118 circumferentially locks the input assembly 121 by
circumferentially locking the connecting shaft 115. The locking
mechanism 118 includes a first locking member 1181 movable relative
to the housing 110 but non-rotatable and a second locking member
1182 that is fixedly connected to or integrally disposed with the
connecting shaft 115. The first locking member 1181 can move
between a first position and a second position. When the first
locking member 1181 is in the first position, the first locking
member 1181 is joined to the second locking member 1182, that is,
the locking mechanism 118 is in the locked state, and the
connecting shaft 115 is circumferentially locked. In this
embodiment, it can be learned from the above description that,
because the second driving wheel 1132 is fixedly sleeved on an
outer side of the connecting shaft 115 to drive the connecting
shaft 115 to rotate, that is, the connecting shaft 115 and the
output assembly 113 are connected to each other while cannot rotate
relative to each other, when the connecting shaft 115 is locked,
the output assembly 113 is also locked and cannot rotate in the
circumferential direction. In addition, because the output assembly
113 and the input assembly 121 mesh with each other and transfer
torque through the ratchets, that is, the output assembly 113 and
the input assembly 121 cannot rotate relative to each other in the
circumferential direction. Therefore, when the connecting shaft 115
is locked, the input assembly 121 is also circumferentially locked,
so that the first connecting member 114 operably rotates relative
to the second connecting member 122. When the first locking member
1181 is in the second position, the first locking member 1181 is
detached from the second locking member 1182, that is, the locking
mechanism 118 is in the unlocked state, the locking mechanism 118
releases the circumferential locking of the connecting shaft 115,
and the connecting shaft 115 can rotate relative to the housing
110.
[0107] Preferably, the first locking member 1181 is a locking block
provided with a flat square hole 1810, the second locking member
1182 is a flat square shaft segment having an outer shape
corresponding to that of the flat square hole, and the first
locking member 1181 can move between the first position and the
second position in the axial direction of the connecting shaft 115.
Referring to FIG. 4, when the first locking member 1181 moves
upward from the second position to the first position, the flat
square hole 1810 of the locking block is joined to the flat square
shaft segment, and the input assembly 121 is circumferentially
locked. Referring to FIG. 3, when the first locking member 1181
moves downward from the first position to the second position, the
flat square hole of the first locking member 1181 is separate from
the flat square shaft segment and sleeved on an outer side of the
connecting shaft 115. Because the smallest diameter of the flat
square hole is greater than the outer diameter of the connecting
shaft 115, the connecting shaft 115 can rotate freely in the
circumferential direction. It can be understood that, the first
locking member 1181 may be a locking block provided with another
special-shaped hole, for example, a rhombic, triangular, hexagon or
other irregular-shaped hole, and the second locking member 1182 is
disposed to be a special-shaped shaft segment having a shape
corresponding to the above special-shaped hole. Details are not
described herein again.
[0108] Preferably, referring to FIG. 17 and FIG. 18, to facilitate
to mounte the grinding component 12 to the main component 11 by
operating the first connecting member 114, the main component 11
further includes an operating mechanism 119, the operating
mechanism 119 includes an operating member 1190 for the operator to
hold and a seat 1191, and the operating member 1190 is pivotally
disposed on the seat 1191 by a pivot shaft to switch between a
first operation position and a second operation position.
Preferably, the pivot axis includes a first pivot shaft 1901 fixed
to the operating member 1190 and a second pivot axis 1911 fixed to
the seat 1191, the seat 1191 is provided with a first chute 1912
for the first pivot shaft 1901 to rotate, and the operating member
1190 is provided with a second chute (not shown) for the second
pivot axis 1911 to move.
[0109] Referring to FIG. 1, FIG. 3, FIG. 4, FIG. 17, and FIG. 18,
the operating member 1190 can switch between the first position
(referring to FIG. 1 and FIG. 17) in the closed state and the
second position in the open state. It should be noted that, the
operating member at least partially protrudes from the housing when
being in the first position, and the operating member does not
protrude from an outer contour of the housing when being in the
second position. That is, when the operating member is in the first
position, the operating member 1190 and a holding handle 111 are
substantially on the same horizontal line. When the operating
member is in the second position, the operating member 1190 and the
holding handle 111 are placed at an angle. The operating mechanism
119 further includes an abutting member 1904 located between the
operating member 1190 and the first locking member 1181, and the
locking mechanism 118 further includes a first elastic element 1905
located below the first locking member 1181. Referring to FIG. 3,
when the operating member 1190 is in the closed state, the
operating member 1190 abuts against the abutting member 1904
downward, and the abutting member 1904 further abuts against the
first elastic element 1905 through the first locking member 1181,
so that the first elastic element 1905 is compressed, and the first
locking member 1181 is in the second position lower to the first
position. In this case, the connecting shaft 115 can be driven by
the motor 112 to rotate along with the input assembly 121 after a
power switch 1120 is started. When the operating member 1190 moves
from the closed state shown in FIG. 17 to the open state (not shown
in the figure) under the action of the first elastic element 1905,
the abutting member 1904 and the first locking member 1181 move
upward under the action of the first elastic element 1905 until the
first locking member 1181 moves upward to the first position, so
that the flat square hole 1810 of the locking block is joined to
the flat square shaft segment, and the connecting shaft 115 is
circumferentially locked, that is, the input assembly 121 is
circumferentially locked.
[0110] In this embodiment, to facilitate the operation of the first
connecting member 114 and to keep the structure of the grinder 10
simple, the operating member 1190 may further be used to drive the
first connecting member 114 to rotate. After the operating member
1190 is in the open state, when the operating member 1190, is in
the first operation position, the operating member 1190 still
cannot drive the first connecting member 114 to rotate. When the
operating member 1190 rotates from the first operation position to
the second operation position around the pivot axis, the operating
member 1190 can drive the first connecting member 114 to rotate
around its axis (that is, the axis of the input assembly 121). In
this embodiment, the first connecting member is provided with a
transmission element. Referring to FIG. 3 and FIG. 4, in this
embodiment, the transmission element is a second convex lug 1401
disposed on the first connecting member 114, and the operating
member includes a first convex lug 1903 corresponding to the second
convex lug 1401. When the operating member 1190 is in a second
operating state, the first convex lug 1903 is joined to the second
convex lug 1401, so that the operating member 1190 can drive the
seat 1191 and the first connecting member 114 to rotate relative to
the housing 110, to enable the grinding component 12 to be
connected to or detached from the main component 11.
[0111] Referring to FIG. 4, to facilitate to hold, the main
component 11 further includes a holding handle 111 for holding, and
a groove 1110 is disposed below the holding handle 111 for fingers
to bend in during holding. In addition, the common end away from
the motor of the holding handle 111 and the groove 1110 is provided
with a power supply unit. Preferably, in this embodiment, the power
supply unit is a battery pack 13, and the battery pack 13 is
detachably connected to the housing 110. It can be understood that,
in other embodiments, the power supply unit may be an alternating
current power supply unit.
[0112] Referring to FIG. 19, the grinder 10 further includes two
cooling portions and a dust guiding portion 63, and the two cooling
portions are a first cooling portion 61 and a second cooling
portion 62. Each of the two cooling portions and the dust guiding
portion includes a fan disposed in the housing 110, an air inlet,
and an air outlet. That is, the first cooling portion 61 includes a
first fan 610 (referring to FIG. 4), a first air inlet 611, and a
first air outlet 612. The second cooling portion 62 includes a
second fan 620, a second air inlet 621, and a second air outlet
622. The dust guiding portion 63 includes a third fan 630, a third
air inlet 631, and a third air outlet 632. The first fan 610 is a
centrifugal fan located at the top end of the motor 112 away from
the grinding component 12. The first air inlet 611 is located at
two ends of the motor, both close to the grinding component 12 and
away from the grinding component 12. That is, the first air inlet
611 is distributed in the axial direction of the motor 112. The
first air outlet 612 is in an area corresponding to the first fan
610, that is, located between two air inlets of the motor 112. In
this embodiment, preferably, the first fan 610 is located above the
stator and the rotor of the motor 112. An airflow entering from the
first air inlet 611 near the end of the grinding component 12 flows
through the stator and the rotor of the motor under the action of
the first fan 610, then flows out of the first air outlet 612. An
airflow enters from a first air inlet away from an end of the
grinding component 12, flows through an inverter (located above the
fan) in the motor 112, and then flows out of the first air outlet
612. Therefore, the first cooling portion 61 can take away heat
generated from the motor 112 to implement cooling of the motor 112.
In this embodiment, the second fan 620 is fixedly connected to the
second driving wheel 1132 and is driven by the second driving wheel
1132 to rotate, and the second fan 620 is located below the second
driving wheel 1132 to cool the second driving wheel 1132, the
transmission belt located between the first driving wheel 1131 and
the second driving wheel 1132, and so on. The second air inlet 621
and the second air outlet 622 are located in an area on the housing
110 corresponding to the second fan 620 in the housing 110.
Preferably, the second air inlet 621 and the second air outlet 622
are disposed in a vertical direction on the housing 110 in an area
corresponding to the second fan 620. The third fan 630 is located
above the grinding component 12 and is disposed tightly close to
the upper end of the grinding component 12. Preferably, as shown in
FIG. 4, the third fan 630 and the second fan 620 share the same
wheel hub. In other words, the second fan 620 is provided above the
wheel hub, and the third fan 630 is provided below the wheel hub.
The third air inlet 631 is located on a side surface of the plate
body 120 facing sandpaper and the third air inlet 631 is also on
the sandpaper. The third air outlet 632 is a dust collection outlet
in communication with the third fan 630, so that debris and dust
generated during sanding of the grinding component 12 are blown by
the third fan 630 into a dust collection bag or a dust collection
box.
[0113] Referring to FIG. 20 to FIG. 23, a grinder 10' (referred to
as a second embodiment below) with another structure of the present
invention, is the same as the structure of the grinder 10. The
grinder 10' includes a main component 11' and a grinding component
12'. The main component 11' includes a housing 110', a motor 112'
located in the housing 110', and an output assembly 113' driven by
the motor 112' to rotate. The grinding component 12' includes a
grinding body 120' and an input assembly 121' partly located in the
grinding body 120'. A sanding element (for example, sandpaper) can
be mounted on a side, facing the treated surface, of the grinding
body 120'. The input assembly 121' can be driven by the output
assembly 113' to rotate relative to the grinding body 120', to
drive the grinding body 120' to work. To implement the inseparable
connection between the grinding component 12' and the main
component 11' in the axial direction of the motor, the main
component 11' further includes a first connecting member 114', and
the grinding component 12' includes a second connecting member 122'
which can be matched to the first connecting member 114'. The first
connecting member 114' can be driven by the motor 112' to rotate
together with the second connecting member 122'. Preferably, for a
reliable and stable connection between the first connecting member
114' and the second connecting member 122', preferably, the first
connecting member 114' is connected to the second connecting member
122' by a thread. That is, the first connecting member 114' is
provided with a first joining portion 1141', and the second
connecting member 122' is provided with a second joining portion
1221' which can be matched to the first joining portion 1141'.
Preferably, the first joining portion 1141' is provided with an
external thread 1140'. Preferably, the second joining portion 1221'
is disposed to be a mounting hole that can accommodate to the first
joining portion 1141'. At least part of the inner circumferential
surface of the mounting hole is provided with an internal thread
1220' that matches the external thread 1140'. In this embodiment,
the output assembly 113' includes a first driving wheel 1131'
coaxially disposed with the motor 112' and driven by the motor 112'
to rotate and a second driving wheel 1132' driven by the first
driving wheel 1131' and having a pivot axis spaced from that of the
first driving wheel 1131'. The second driving wheel 1132' is
supported by a hollow connecting shaft 115' rotatably disposed in
the housing 110'. A main difference between the structure of the
grinder 10' in this embodiment and the grinder 10 in that
embodiment is that the pivot axis of the input assembly 121' in
this embodiment is located between the axis of the motor 112' and a
battery pack 13'. Because the motor 112' and the battery pack 13'
in the grinder 10' are heavier than the other parts of the entire
machine, the center of gravity of the entire machine is located
between the motor 112' and the battery pack 13'. In this way, the
center of gravity of the entire machine can be close to a holding
handle 111' and can be close to the pivot axis of the input
assembly 121', to facilitate holding and stabilize the output of
the entire machine. In addition, as can be known from the foregoing
description of the embodiments, the limiting mechanism needs to be
disposed at the main component 11' of the grinder 10' to join with
the noncircular grinding component. To reduce the vibration of the
entire machine during working, a limiting mechanism 117' is needed
and the limiting mechanism 117' usually includes a plurality of
limiting feet 1171'. In the foregoing embodiment, because the pivot
axis of the input assembly 121 is located on a side, away from the
holding handle 111, of the motor 112, the length of the entire
machine is increased by the limiting feet. In this embodiment,
because the pivot axis of the input assembly 121' is located on a
side, near the holding handle 111', of the motor 112', the limiting
mechanism 117' or the limiting feet 1171' completely move toward
the battery pack 13', to help reduce the length of the entire
machine.
[0114] In the foregoing embodiments, the cooling of the motor 112
is completely accomplished by the first cooling portion 61 without
using the large second fan 620 of the second cooling portion. As a
result, the motor 112 is not adequately cooled. To achieve a better
cooling effect of the motor 112, this embodiment provides another
cooling structure different from the foregoing embodiments.
Referring to FIG. 20 and FIG. 21, a cooling portion of the grinder
10' in this embodiment includes a first cooling portion (not shown
in the figure) configured to cool the motor 112' and a second
cooling portion (not shown in the figure) configured to mainly cool
the second driving wheel 1132' and a transmission belt connecting
the first driving wheel 1131' and the second driving wheel 1132'.
The first cooling portion includes a first fan 610'. The first fan
610' is located below positions at which the stator and the rotor
of the motor 112' are located. A second fan 620' is located below
the second driving wheel 1132'. In this embodiment, to reduce the
length of the grinder 10' in a horizontal direction, the second fan
620' and the first fan 610' are placed in a vertically staggered
manner. That is, the first fan 610' and the second fan 620' are not
at the same horizontal height. Preferably, the second fan 620' is
located below the first fan 610' in a height direction. In this
embodiment, the first cooling portion and the second cooling
portion share a same air inlet 630' and air outlet 640'. At least
part of the air inlet 630' is located above the stator and the
rotor of the motor 112', and at least part of the air outlet 640'
is located on the housing 110' in an area corresponding to the
second fan 620'. The second fan 620' can guide an airflow that is
flowing through the first fan 610' to follow out of the air outlet
640'. In this way, the airflow stably enters the housing 110' from
the air inlet 630', moves to the first fan 610 through the motor
112', and is then guided by the second fan 620' out of the housing
110'. That is, in this embodiment, the first cooling portion
configured to cool the motor 112' is in communication with the
second cooling portion configured to mainly cool the second driving
wheel 1132'. An airflow enters from the air inlet 630', then enters
from the upper end (the end away from the grinding component 12')
of the motor 112', flows inside the motor 112', flows out through a
lower end (the end near the grinding component 12') of the motor
112', and is then guided by the second fan 620' to flow out of the
air outlet 640'. Therefore, the motor 112', the second driving
wheel 1132', the transmission belt, and the others near the the
second fan 620' are cooled.
[0115] This embodiment further provides a locking mechanism 118'
different from the locking mechanism 118 in the foregoing
embodiment. Referring to FIG. 24 and FIG. 25, a second locking
member 1182' in this embodiment is a flange body fastened on an
outer side of the connecting shaft 115'. The flange body is
provided with a stop slot 1810'. A first locking member 1181' is a
stop block movable in the axial direction. When the stop block
moves upward in the axial direction to the first position, at least
part of the stop block is located in the stop slot 1810' to limit
the circumferential rotation of the connecting shaft 115'. When the
stop block moves downward to the second position in the axial
direction, the stop block is separate from the stop slot 1810'. The
connecting shaft 115' can freely rotate. Certainly, it can be
understood that, in other embodiments, the movement direction of
the stop block may further be another direction, for example, a
radial direction or a direction at another angle from the axial
direction. Details are not described herein again. In addition,
same as the foregoing embodiment, in this embodiment, an operating
member 1190' is used to implement switching of the locking
mechanism 118' between the locked state and the unlocked state.
Referring to FIG. 24, when the operating member 1190' is in the
closed state, the operating member 1190' abuts against the first
locking member 1181' (the stop block) in the axial direction. The
first locking member 1181' compresses a first elastic element 1905'
downward, so that the first locking member 1181' is located at the
second position below, the first locking member 1181' is separate
from the second locking member 1182', and the locking mechanism
118' is in the unlocked state. When the operating member 1190' is
switched from the closed state to the open state, the second
locking member 1182' moves upward to the first position under the
action of the first elastic element 1905', the stop block is
separate from the stop slot 1810', and the locking mechanism 118'
is in the locked state.
[0116] FIG. 26 and FIG. 27 show a grinder 10'' (referred to as a
third embodiment below) with another structure according to the
present invention. The grinder 10'' includes a main component 11''
and a grinding component 12''. The main component 11'' includes a
housing 110'', a motor 112'' located in the housing 110'', and an
output assembly 113'' driven by the motor 112'' to rotate. A
grinding component 12'' includes a body 120'' and an input assembly
121'' at least partially located in the grinding body 120''. A
sanding element (for example, sandpaper) can be mounted on a side,
facing the working surface, of the grinding body 120''. The input
assembly 121'' can be driven by the output assembly 113'' to rotate
relative to the grinding body 120'', to drive the grinding body
120'' to work. To implement the inseparable connection between the
grinding component 12'' and the main component 11'' in an axial
direction of the motor, the main component 11'' further includes a
first connecting member 114''. The grinding component 12'' includes
a second connecting member 122'' which can be matched to the first
connecting member 114''. The first connecting member 114'' can be
driven by the motor 112'' to rotate together with the second
connecting member 122''. Preferably, for a reliable and stable
connection between the first connecting member 114'' and the second
connecting member 122''. Preferably, the first connecting member
114'' and the second connecting member 122'' are connected by a
thread. In this embodiment, the output assembly 113'' includes an
output shaft 1135'' fixedly connected to the motor 112'' and
coaxially driven by the motor to rotate. The first connecting
member 114'' includes an external thread 1140'' disposed on a
circumference thereof. The first connecting member 114'' is
coaxially and fixedly connected to the output shaft 1135'' and
being driven by the output shaft 1135'' to rotate. Preferably, the
first connecting member 114'' is integrally formed with the output
shaft 1135''. The first connecting member 114'' includes a first
joining portion located below the first connecting member 114'' and
configured to connect to the second connecting member 122''.
Preferably, a first joining portion 1141'' is provided with the
external thread 1140''. The second connecting member 122'' includes
a second joining portion 1221'' joined to the first joining portion
1141''. Preferably, the second joining portion 1221'' is disposed
to be a mounting hole that can accommodate the first joining
portion 1141''. At least part of the inner circumferential surface
of the mounting hole is provided with an internal thread 1220''
which can be joined to the external thread 1140''. Therefore, in
this embodiment, the motor 112'' transfers the rotation to the
first connecting member 114'' through the output shaft 1135''. The
first connecting member 114'' drives the input assembly 121'' by a
threaded structure to rotate relative to the plate body 120'', to
drive the plate body 120'' to perform sanding work. In other words,
in this embodiment, the joint between the external thread 1140' of
the first connecting member 114'' and the internal thread 1220'' of
the mounting hole not only implements the axial connection between
the main component 11'' and the grinding component 12'', but also
can implement torque transfer between the main component 11'' and
the grinding component 12''.
[0117] This embodiment further provides a locking mechanism 118''
different from that in the foregoing embodiment. The locking
mechanism 118'' can get the input assembly 121'' to be locked
circumferentially, so that the first connecting member 114'' can
rotate relative to the second connecting member. Preferably, the
locking mechanism 118'' is disposed at the main component 11''. The
locking mechanism 181'' has a locked state and an unlocked state.
When the locking mechanism 118'' is in the locked state, the
locking mechanism 118'' circumferentially locks the input assembly
121''. That is, the input assembly 121'' cannot rotate relative to
the housing 110''. When the locking mechanism 118'' is in the
unlocked state, the locking mechanism 118'' releases the
circumferential locking of the input assembly 121'', that is, the
input assembly 121'' can rotate relative to the housing 110''. The
locking mechanism 118'' includes a first locking member 1181''
movable relative to the housing 110'' and a second locking member
1182'' fixedly connected to or integrally disposed with the input
assembly 121''. Preferably, the second locking member 1182'' is
located at an end, away from a plate body 1202'', of the input
assembly 121'', and is exposed from the grinding body 120'' to
facilitate joint of the first locking member 1181''. Preferably,
the first locking member 1181'' can move between the first position
and the second position in the axial direction. Referring to FIG.
26, when the first locking member 1181'' is located at the lower
first position, the first locking member 1181'' is joined to the
second locking member 1182''. That is, the locking mechanism 118''
is in the locked state. The input assembly 121'' is
circumferentially locked. Referring to FIG. 27, when the first
locking member 1181'' moves upward and is located at the upper
second position, the first locking member 1181'' is separate from
the second locking member 1182''. That is, the locking mechanism
118'' is in the unlocked state, the locking mechanism 118''
releases the circumferential locking of the input assembly 121'',
and the input assembly 121'' can rotate relative to the housing
110''. In this embodiment, an operating member 1190'' configured to
operate the locking mechanism 118'' to enable the first locking
member 1181'' to move between the first position and the second
position is further included. The operating member 1190'' can
switch between the open state and the closed state. Referring to
FIG. 26, when the operating member 1190'' is in the closed state,
the operating member 1190'' abuts against the first locking member
1181'' downward in the axial direction, and the first locking
member 1181'' abuts against a first elastic element 1905'' downward
in the axial direction. Therefore, the first locking member 1181''
is located at the lower first position, and the input assembly
121'' is circumferentially locked. Referring to FIG. 27, when the
operating member 1190'' is in the open state, the first locking
member 1181'' moves upward in the axial direction to the second
position under the action of the first elastic element 1905''. The
locking mechanism 118'' releases the circumferential locking of the
input assembly 121''. A difference from the foregoing embodiment is
that the operating member 1190'' in this embodiment cannot drive
the first connecting member 114'' to move.
[0118] When the input assembly 121'' is circumferentially locked,
the movement of the first connecting member 114'' with the threaded
rod is mainly implemented by using an external tool 1000'' to drive
the motor 112'' to rotate in this embodiment. Preferably, the upper
end of the motor 112'' is provided with a flat square shaft segment
1121'' fixedly connected to the motor 112''. An external tool
drives the flat square shaft segment to rotate and further enable
the threaded rod 1140'' to rotate relative to the threaded hole
1220''.
[0119] FIG. 28 and FIG. 29 show a grinder 20 (referred to as a
fourth embodiment below) with another structure according to the
present invention. The grinder 20 includes a main component 21 and
a grinding component 22. The main component 21 includes a housing
210, a motor 212 located in the housing 210, and an output assembly
213 driven by the motor 212 to rotate. The grinding component 22
includes a grinding body 220 and an input assembly 221 located in
the grinding body 220. A sanding element (for example, sandpaper)
can be mounted on a side, facing the working surface, of the
grinding body 220. The input assembly 221 can be driven by the
output assembly 213 to rotate relative to the grinding body 220, to
drive the grinding body 220 to work. To implement the inseparable
connection between the grinding component 22 and the main component
21 in an axial direction of the motor, the main component 21
further includes a first connecting member 214. The grinding
component 22 includes a second connecting member 222 which can be
matched to the first connecting member 214. The first connecting
member 214 can be driven by the motor 212 to rotate together with
the second connecting member 222. Preferably, for a reliable and
stable connection between the first connecting member 214 and the
second connecting member 222, the first connecting member 214 and
the second connecting member 222 are connected by a thread. In this
embodiment, the output assembly 213 includes an output shaft 2135
fixedly connected to the motor 212 and coaxially driven by the
motor 212 to rotate and an output portion 2133 fixedly connected to
the output shaft 2135. The input assembly 221 includes an input
portion 2210 which can be matched to the output portion 2133. In
this embodiment, the output shaft 2135 is a hollow shaft
penetrating the motor 212 in the axial direction. Same as those in
the first embodiment and the second embodiment described above, an
end, near the input assembly 221, of the first connecting member
214 is provided with an external thread, and the first connecting
member 214 is located at least partially inside the hollow shaft.
In this embodiment, a locking structure configured to lock the
input assembly 221 is further included. A locking mechanism 218
includes a second locking member 2182 fixedly connected to the
output shaft 2135 and a first locking member 2181 movable in the
axial direction but is non-rotatably disposed in the housing 210.
Substantially the same as the first embodiment described above, the
first locking member 2181 is a locking block provided with a flat
square hole or other irregular-shaped hole. The second locking
member 2182 is configured with a flat square shaft having a
circumferential shape that corresponds to the flat square hole or
the other irregular-shaped hole. The principle of the part has been
described in the foregoing first embodiment, and the details are
not described herein again. The grinder 20 in this embodiment
further includes an operating member mechanism 219. The functions
and work principles of the operating member mechanism 219 are
substantially the same as the functions and principles in the first
embodiment and the second embodiment. The details are not described
herein again.
[0120] FIG. 30 and FIG. 31 show a grinder 30 (referred to as a
fifth embodiment below) with another structure according to the
present invention. The grinder 30 includes a main component 31 and
a grinding component 32. The main component 31 includes a housing
310, a motor 312 located in the housing 310, and an output assembly
313 driven by the motor 312 to rotate. The grinding component 32
includes a grinding body 320 and an input assembly 321 located in
the grinding body 320. A sanding element (for example, sandpaper)
can be mounted on a side, facing the working surface, of the
grinding body 320. The input assembly 321 can be driven by the
output assembly 313 to rotate relative to the grinding body 320 to
drive the body 320 to work. To implement the inseparable connection
between the grinding component 32 and the main component 31 in an
axial direction of the motor, the main component 31 further
includes a first connecting member 314. The input assembly 321
includes a second connecting member 322 which can be matched to the
first connecting member 314. The first connecting member 314 can be
driven by the motor 312 to rotate together with the second
connecting member 322. However, it should be noted that the second
connecting member 322 in this embodiment is not fixedly disposed
with other parts of the input assembly, that is, is not fixedly
disposed with an eccentric element in the input assembly 321. The
second connecting member 322 can rotate relative to the eccentric
element. That is, an operable connecting member in this embodiment
is the second connecting member 322. An operator can only operate
the second connecting member 322 from the lower of the grinding
component 32 after the sandpaper is peeled off. Preferably, for a
reliable and stable connection between the first connecting member
314 and the second connecting member 322, and the first connecting
member 314 and the second connecting member 322 are connected by a
thread. Preferably, an end, near the input assembly 321, of the
first connecting member 314 is provided with threaded hole 3141.
The second connecting member 322 is a screw 3220 connected to the
threaded hole 3141. In this embodiment, the output assembly 313
includes an output shaft 3135 fixedly connected to the motor 312
and coaxially driven by the motor 312. The output shaft 3135 is
fixedly connected to the first connecting member 314. The first
connecting member 314 fastens the input assembly 321 by screw, to
enable the output shaft 3135 to transfer torque to the input
assembly 321.
[0121] In this embodiment, the output assembly 313 may further
include an output portion 3133 fixedly connected to the output
shaft 3135. The input assembly 312 includes an input portion 3210
which can be matched to the output portion 3133. It can be
understood that, when the output assembly 313 does not include the
output portion 3133 and/or the input assembly 321 does not include
the input portion 3210, during the tightening of the screw 3220,
the input assembly 321 may rotate together with the screw 3220, to
enable the body 320 to move together. Therefore, the body 320 may
interfere with a tool that enters through an opening 3203 below the
body to tighten the screw 3220.
[0122] In addition, the threaded segment of the screw 3220 has a
relatively small diameter, leading to low reliability and
durability during torque transfer. With the output portion 3133 and
the input portion 3210 are disposed, the reliability of torque
transfer can further be ensured.
[0123] FIG. 32 and FIG. 33 show a grinder 40 with another structure
according to the present invention. The grinder 40 includes a main
component 41 and a grinding component 42. The main component 41
includes a housing 410, a motor 412 located in the housing 410, and
an output assembly 413 driven by the motor 412 to rotate. The
grinding component 42 includes a grinding body 420 and an input
assembly 421 located in the body 420. A sanding element (for
example, sandpaper) can be mounted on a side, facing the working
surface, of the grinding body 420. The input assembly 421 can be
driven by the output assembly 413 to rotate relative to the
grinding body 420, to drive the grinding body 420 to work. To
implement the inseparable connection between the grinding component
42 and the main component 41 in an axial direction of the motor
412. The main component 41 further includes a first connecting
member 414. The input assembly 421 includes a second connecting
member 422 which can be matched to the first connecting member 414.
The first connecting member 414 can be driven by the motor 412 to
rotate together with the second connecting member 422. Preferably,
for a reliable and stable connection between the first connecting
member 414 and the second connecting member 422, the first
connecting member 414 and the second connecting member 422 are
connected by thread. Preferably, an end, near the second connecting
member 422, of the first connecting member 414 is provided with an
external thread 4140. The second connecting member 422 is disposed
to be a mounting hole. An internal thread 4220 which can be matched
to the external thread 4140 is provided in the mounting hole. In
this embodiment, the output assembly 413 includes a first driving
wheel 4131 fixedly connected to the motor 412 and coaxially driven
by the motor 412 to rotate, a second driving wheel 4132 driven by
the first driving wheel 4131 to rotate, and an output shaft fixedly
connected to the second driving wheel 4132 and coaxially driven by
the second driving wheel 4132. In this embodiment, the output shaft
is fixedly connected to or integrally disposed with the first
connecting member 414 to transfer the output torque to the first
connecting member 414. The first connecting member 414 further
transfers the torque to the input assembly 421 provided with the
internal thread 4220 through threaded structure to drive the input
assembly 421 to rotate. That is, same as the foregoing third
embodiment, the joint between a threaded rod 4140 and the mounting
hole implements the axial connection between the main component 41
and the grinding component 42 and can implement torque transfer
between the main component 41 and the grinding component 42. In
addition, this embodiment further provides another operating
mechanism 419 configured to drive the first connecting member 414
to rotate. The operating mechanism includes an operating member
4190, a second elastic element 4191, and a pivot axis 4192. The
operating member 4190 rotates around the pivot axis 4192 to
implement connection or disconnection between the operating member
4190 and the first connecting member 414. FIG. 32 is a state
diagram in which the operating member 4190 is disconnected from the
first connecting member 414. FIG. 33 is a state diagram in which
the operating member 4190 is connected to the first connecting
member 414.
[0124] It should be noted that in this embodiment, the rotation of
the first connecting member 414 relative to the second connecting
member 422 also requires a corresponding locking mechanism. The
locking mechanism is not shown in FIG. 32 and FIG. 33 in this
embodiment. For the arrangement of the locking mechanism, reference
may be made to the arrangement manners in the foregoing other
embodiments. In addition, in all the embodiments of the present
invention, the first connecting member or the second connecting
member may be locked in other manners. For example, a slot is
provided in the housing or the body, and an external stop component
is inserted in the slot, to implement circumferential locking of
the first connecting member or the second connecting member. The
present invention is not limited to the implementation in the
foregoing embodiments, and the structures of different embodiments
that have been shown may be combined with each other. Those skilled
in the art may make other changes under the teaching of the
technical essence of the present invention, and the changes shall
fall within the protection scope of the present invention as long
as the same or similar functions can be implemented.
* * * * *