U.S. patent application number 16/236630 was filed with the patent office on 2020-05-14 for battery powered long-lever sander.
The applicant listed for this patent is Tingjin LI. Invention is credited to Tingjin LI.
Application Number | 20200147741 16/236630 |
Document ID | / |
Family ID | 68702355 |
Filed Date | 2020-05-14 |
United States Patent
Application |
20200147741 |
Kind Code |
A1 |
LI; Tingjin |
May 14, 2020 |
Battery Powered Long-Lever Sander
Abstract
The utility model discloses a battery powered long-lever sander.
The battery powered long-lever sander includes a sander head
assembly and a handle. The sander head assembly is connected to the
handle and includes a housing and a sanding disc that is disposed
in the housing. The battery powered long-lever sander further
includes a driving system connected to the sanding disc and
configured to drive the sanding disc to run. The driving system is
electrically connected to a driving power source, and the driving
power source is a battery pack so that the sander can be used
without limitations of plugging of a power wire and thus can be
used more conveniently.
Inventors: |
LI; Tingjin; (Zhejiang,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
LI; Tingjin |
Zhejiang |
|
CN |
|
|
Family ID: |
68702355 |
Appl. No.: |
16/236630 |
Filed: |
December 30, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B24B 47/12 20130101;
B24B 7/184 20130101 |
International
Class: |
B24B 7/18 20060101
B24B007/18; B24B 47/12 20060101 B24B047/12 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 9, 2018 |
CN |
201821848640.8 |
Claims
1. A battery powered long-lever sander, characterized by
comprising: a sander head assembly that comprises a housing and a
sanding disc disposed in the housing; and a driving system
connected to the sanding disc and configured to drive the sanding
disc to run; wherein the driving system is electrically connected
to a driving power source which is a battery pack.
2. The battery powered long-lever sander according to claim 1,
characterized in that the battery pack has an output voltage of 18
V to 60 V.
3. The battery powered long-lever sander according to claim 1,
characterized in that the driving system comprises a driving motor
and a transmission mechanism that is connected in transmission to
the sanding disc, wherein the driving motor is a brushless magnet
motor or a brush magnet motor; and a control unit of the driving
motor is configured to keep a rotating speed constant without
consideration of load.
4. The battery powered long-lever sander according to claim 3,
characterized in that the brushless magnet motor is a disc type
motor/flat type multi-polar high power density motor.
5. The battery powered long-lever sander according to claim 1,
characterized by further comprising a handle that is connected to
the head assembly.
6. The battery powered long-lever sander according to claim 5,
characterized in that the handle comprises a main handle and an
extension handle that are connected by means of a quick release
assembly.
7. The battery powered long-lever sander according to claim 6,
characterized in that a mechanical main power switch is provided on
the main handle.
8. The battery powered long-lever sander according to claim 6,
characterized in that a power interface of the sander is located on
the main handle.
9. The battery powered long-lever sander according to claim 8,
characterized in that the power pack is directly connected to the
power interface, or connected to the power interface by a wire.
Description
BACKGROUND OF THE INVENTION
[0001] The utility model relates to the technical field of sanders,
and more particularly to a battery powered long-lever sander.
[0002] Before plastering, painting or wallpapering of a wall, the
wall needs to be sanded and cleaned. As a mature technology, wall
sanders have been extensively used. In the prior art, wall sanders
are mostly used for sanding a wall, and there may exist some
defects as follows when they are used for sanding a ceiling: (1) To
facilitate omnidirectional sanding of a ceiling and a wall, a
sanding disc and a handle are movably connected to each other. When
sanding a ceiling, the sanding disc has only one stressed side with
the ceiling, and the load-bearing side comes into contact with the
ceiling while the other side of the sanding disc will drop down.
When sanding a ceiling, it needs more effort to operate due to
uneven stress. (2) An existing sander with a dust suction device
may have a poor dust suction effect due to limitations of the
mechanism. Secondly, a sanding disc of the wall sander has an
abrasive surface structure and is a flat surface as a whole with
single structure and function. After being used for a long time,
the sanding disc may have a rubbing surface apt to be damaged by
the sanding disc and may be difficult to replace. (3) An LED (Light
Emitting Diode) strip lamp and a transparent lampshade in a
lighting structure of an existing sander are structured separately,
and during use, dust still can fall into the transparent lampshade
and on the LED strip lamp, affecting the use of the LED strip lamp.
(4) Due to an unreasonable design of the dust suction mechanism,
the dust suction effect may not be obvious. (5) The handle cannot
be extended, resulting in limitations of use. BRIEF SUMMARY OF THE
INVENTION
[0003] The utility model aims to provide a battery powered
long-lever sander so as to solve the problems of the defects of an
existing sander noted in the above background art.
[0004] To achieve the above aim, the utility model provides the
following technical solutions:
[0005] A battery powered long-lever sander includes a sander head
assembly that includes a housing and a sanding disc disposed in the
housing, and also a driving system connected to the sanding disc
and configured to drive the sanding disc to run. The driving system
is electrically connected to a driving power source which is a
battery pack.
[0006] Preferably, the battery pack has an output voltage of 18 V
to 60 V.
[0007] Preferably, the driving system includes a driving motor and
a transmission mechanism that is connected in transmission to the
sanding disc, where the driving motor is a brushless magnet motor
or a brush magnet motor; and a control unit of the driving motor is
configured to keep a rotating speed constant without consideration
of load.
[0008] Preferably, the brushless magnet motor is a disc type
motor/flat type multi-polar high power density motor.
[0009] The brushless motor without hall sensor has a driver
connected to a main handle, and the main handle includes an
aluminum connecting lever through which the driver dissipates
heat.
[0010] Preferably, the battery powered long-lever sander further
includes a handle that is connected to the sander head assembly.
The handle includes a main handle and an extension handle that are
connected by means of a quick release assembly.
[0011] Preferably, a mechanical main power switch is provided on
the main handle.
[0012] Preferably, a power interface of the sander is located on
the main handle.
[0013] Preferably, the power pack is directly connected to the
power interface, or connected to the power interface by a wire.
[0014] Preferably, the battery powered long-lever sander further
includes a sanding disc suspending device that holds, during
sanding, the sanding disc parallel to a wall so that the wall is
evenly stressed. The sanding disc suspending device is connected to
the housing and the handle and also includes a dust self-suction
structure and a lighting device. The dust self-suction structure is
arranged within the housing, and the lighting device is connected
to the housing.
[0015] Preferably, the dust self-suction structure includes a dust
suction fan blade that is connected in transmission to the driving
system. The dust suction fan blade is vertically disposed in a dust
suction channel. A dust suction hood independent of the housing is
arranged outside the dust suction fan blade, and a dust outlet is
provided on the dust suction hood, where the dust suction fan blade
is collinear, at a part thereof with the strongest suction, with
the dust suction channel.
[0016] The dust self-suction structure specifically includes a dust
suction inlet provided in the top of the housing. The dust suction
hood is connected to the dust suction inlet. The dust suction
channel is formed between the dust suction inlet and the dust
outlet on the dust suction hood. The dust suction fan blade is
arranged in the dust suction hood and connected in transmission to
an output shaft of the motor.
[0017] Preferably, the lighting device includes an LED strip lamp
and a transparent lampshade that are molded integrally.
[0018] The lighting device may be connected to the outside of the
housing in any known manner.
[0019] Specifically, the LED lamp strip includes a substrate and a
plurality of series-connected LED leads disposed on the substrate.
A transparent encapsulating material is disposed on the outer
surfaces of the LED leads. The transparent encapsulating material
fills the space between the LED strip lamp and the transparent
lampshade so that the LED strip lamp and the transparent lampshade
are formed into an integrated structure. The LED strip lamp and the
transparent lampshade are hermetically connected by the transparent
encapsulating material so that dust can be prevented from entering
the transparent lampshade.
[0020] Preferably, the quick release assembly includes a first
connecting terminal located at an end of the main handle, a second
connecting terminal located at an end of the extension handle, and
a connecting component disposed on the first connecting end. The
connecting component includes a connecting base vertically
connected to the outer surface of the first connecting terminal. A
movable locking spanner is connected to the connecting base. The
locking spanner includes a locking end at the head and a
hand-holding portion connected to the locking end. When connecting,
the main handle is nested with the first connecting terminal and
the second connecting terminal that are both placed on the
extension handle, and then the locking spanner is pulled. When the
locking end is perpendicular to the outer surface of the first
connecting terminal on the main handle, a lock state is reached.
The main handle and the extension handle are connected after the
first connecting terminal and the second connecting terminal are
held down on each other.
[0021] Specifically, the connecting base includes a connecting
portion extending from the outer surface of the first connecting
terminal. The connecting portion is provided with a first through
hole, while the locking end is provided with a second through hole,
and the locking spanner is connected to the connecting base by
using a pin shaft passing through the first through hole and the
second through hole.
[0022] The sanding disc suspending device includes a mounting base
disposed on the housing. A symmetrical supporting arm extends from
the tail end of the handle, and the other end of the supporting arm
is connected to the mounting base. The sanding disc suspending
device further includes at least one strip-like elastic piece, with
two ends of the strip-like elastic piece being fixedly connected to
the supporting arm. A snap-in device for fixing the strip-like
elastic piece is disposed below the strip-like elastic piece. The
middle portion of the strip-like elastic piece is fastened in the
snap-in device, and the snap-in device is capable of hooking on to
the strip-like elastic piece so as to elastically connect one side
of the sander head to the supporting arm. In use, when the sanding
disc comes into contact with a wall, the stressed side can be
pulled down by the strip-like elastic piece so that the sanding
disc remains parallel to the wall and the working center of gravity
of the sander head is effectively balanced. Thus, when sanding a
ceiling, the ceiling may be evenly stressed and less effort may be
needed to operate, thereby improving the comfort of an
operator.
[0023] Compared with the prior art, the utility model has the
following advantages: using a battery pack as the driving power
source, the sander can be used without limitations of plugging of a
power wire and thus can be used more conveniently. The sanding disc
suspending device can hold, during sanding, the sanding disc
parallel to a wall so that the wall is evenly stressed. Secondly,
the dust suction fan blade of the dust self-suction structure is
collinear, at a part thereof with the strongest suction, with the
dust suction channel, thereby enhancing the dust suction effect.
Next, the handle can be lengthened and shortened with high
flexibility. The LED strip lamp and the transparent lampshade of
the lighting device are hermetically connected by the transparent
encapsulating material so that dust can be prevented from entering
the transparent lampshade. The utility model is novel in structure
design and highly practicable.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 is a look-down schematic structure diagram of the
utility model.
[0025] FIG. 2 is a partial schematic structure diagram of a dust
self-suction structure of FIG. 1.
[0026] FIG. 3 is a schematic structure diagram of a quick release
assembly of FIG. 1.
[0027] FIG. 4 is a schematic structure diagram of a sanding disc
suspending device of FIG. 1.
DETAILED DESCRIPTION OF THE INVENTION
[0028] The technical solutions in embodiments of the utility model
will be described clearly and fully in combination with the
accompanying drawings in the embodiments of the utility model. It
is apparent that the described embodiments are merely part of,
rather than all, embodiments of the utility model. Any other
embodiments obtained by those of ordinary skill in the art based on
the embodiments in the utility model without creative efforts shall
fall into the scope of protection of the utility model.
[0029] Referring to FIGS. 1-4, the utility model provides a
technical solution as follows:
[0030] A battery powered long-lever sander includes a sander head
assembly 1. The sander head assembly 1 includes a housing and a
sanding disc disposed in the housing. The battery powered
long-lever sander also includes a driving system connected to the
sanding disc and configured to drive the sanding disc to run. The
driving system is electrically connected to a driving power source
which is a battery pack. The battery pack has an output voltage of
18 V to 60 V.
[0031] The driving system includes a driving motor and a
transmission mechanism that is connected in transmission to the
sanding disc, where the driving motor is a brushless magnet motor
or a brush magnet motor; and a control unit of the driving motor is
configured to keep a rotating speed constant without consideration
of load. The brushless magnet motor is a disc type motor/flat type
multi-polar high power density motor. The brushless motor without
hall sensor has a driver connected to a main handle, and the main
handle includes an aluminum connecting lever through which the
driver dissipates heat.
[0032] The battery powered long-lever sander further includes a
handle 2 that is connected to the sander head assembly. The handle
includes a main handle 7 and an extension handle 8 that are
connected by means of a quick release assembly. A mechanical main
power switch is provided on the main handle. A power interface of
the sander is located on the main handle. The power pack is
directly connected to the power interface, or connected to the
power interface by a wire.
[0033] The battery powered long-lever sander further includes a
sanding disc suspending device that holds, during sanding, the
sanding disc parallel to a wall so that the wall is evenly
stressed. The sanding disc suspending device is connected to the
housing and the handle and also includes a dust self-suction
structure and a lighting device. The dust self-suction structure is
arranged within the housing and includes a dust suction fan blade
(not shown) that is connected in transmission to the driving
system. The dust suction fan blade is vertically disposed in a dust
suction channel. A dust suction hood 3 independent of the housing
is arranged outside the dust suction fan blade, and a dust outlet 4
is provided on the dust suction hood, where the dust suction fan
blade is collinear, at a part thereof with the strongest suction,
with the dust suction channel. The dust self-suction structure
specifically includes a dust suction inlet 5 provided in the top of
the housing. The dust suction hood 3 is connected to the dust
suction inlet. The dust suction channel 6 is formed between the
dust suction inlet and the dust outlet on the dust suction hood.
The dust suction fan blade is arranged in the dust suction hood and
connected in transmission to an output shaft of the motor. The
driving system is electrically connected to a driving power source.
The driving power source is a battery pack, and the battery pack is
the one with an output voltage of 18 V.
[0034] The quick release assembly includes a first connecting
terminal 9 located at an end of the main handle, a second
connecting terminal 10 located at an end of the extension handle,
and a connecting component 11 disposed on the first connecting end.
The connecting component includes a connecting base 12 vertically
connected to the outer surface of the first connecting terminal. A
movable locking spanner is connected to the connecting base. The
locking spanner includes a locking end 14 at the head and a
hand-holding portion 15 connected to the locking end. When
connecting, the main handle is nested with the first connecting
terminal and the second connecting terminal that are both placed on
the extension handle, and then the locking spanner is pulled. When
the locking end is perpendicular to the outer surface of the first
connecting terminal on the main handle, a lock state is reached.
The main handle and the extension handle are connected after the
first connecting terminal and the second connecting terminal are
held down on each other. Specifically, the connecting base includes
a connecting portion extending from the outer surface of the first
connecting terminal. The connecting portion is provided with a
first through hole, while the locking end is provided with a second
through hole, and the locking spanner is connected to the
connecting base by using a pin shaft passing through the first
through hole and the second through hole. The driving system
includes a driving motor and a transmission mechanism that is
connected in transmission to the sanding disc, where the driving
motor is a brushless magnet motor or a brush magnet motor. The
transmission mechanism is already described above in detail and
will not be redundantly described herein. The driving system is
electrically connected to a driving power source. The driving power
source is a battery pack that outputs a low-voltage direct current.
The driving power source may also be a direct-current power source.
The lighting device is connected to the housing. The lighting
device includes an LED strip lamp and a transparent lampshade that
are molded integrally. The lighting device may be connected to the
outside of the housing in any known manner. Specifically, the LED
lamp strip includes a substrate and a plurality of series-connected
LED leads disposed on the substrate. A transparent encapsulating
material is disposed on the outer surfaces of the LED leads. The
transparent encapsulating material fills the space between the LED
strip lamp and the transparent lampshade so that the LED strip lamp
and the transparent lampshade are formed into an integrated
structure. The LED strip lamp and the transparent lampshade are
hermetically connected by the transparent encapsulating material so
that dust can be prevented from entering the transparent lampshade.
The lighting device is already described above in detail and will
not be redundantly described herein.
[0035] The sanding disc suspending device includes a mounting base
16 disposed on the housing. A symmetrical supporting arm 17 extends
from the tail end of the handle, and the other end of the
supporting arm is connected to the mounting base 16. The sanding
disc suspending device further includes at least one strip-like
elastic piece 18, with two ends of the strip-like elastic piece
being fixedly connected to the supporting arm. A snap-in device 19
for fixing the strip-like elastic piece is disposed below the
strip-like elastic piece. The middle portion of the strip-like
elastic piece is fastened in the snap-in device, and the snap-in
device is capable of hooking on to the strip-like elastic piece so
as to elastically connect one side of the sander head to the
supporting arm. In use, when the sanding disc comes into contact
with a wall, the stressed side can be pulled down by the strip-like
elastic piece so that the sanding disc remains parallel to the wall
and the working center of gravity of the sander head is effectively
balanced. Thus, when sanding a ceiling, the ceiling may be evenly
stressed and less effort may be needed to operate, thereby
improving the comfort of an operator.
[0036] While the embodiments of the utility model are already
illustrated and described, for those of ordinary skill in the art,
it will be understood that various changes, modifications,
replacements and variations can be made to such embodiments without
departing from the principles and spirit of the utility model. The
scope of the utility model is defined by the appended claims and
equivalents thereof.
* * * * *