CN210148009U

CN210148009U - Electric hammer

Info

Publication number: CN210148009U
Application number: CN201920295454.4U
Authority: CN
Inventors: 潘冬华
Original assignee: Nantong Poly Mechanical And Electrical Manufacturing Co Ltd
Current assignee: Nantong Poly Mechanical And Electrical Manufacturing Co Ltd
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2020-03-17
Anticipated expiration: 2029-03-08

Abstract

The embodiment of the utility model discloses instrument specifically is an electric hammer, and the electric hammer includes: the device comprises a rotating assembly, a motor, a transmission assembly and a clutch device. The rotating assembly is used for enabling the electric hammer to output rotating force, the transmission assembly is used for transmitting the power output by the motor to the rotating assembly, the transmission assembly further comprises a transmission piece and a driving piece, the transmission piece and the rotating assembly form synchronous rotation, the driving piece rotates when being driven by the motor, and the clutch device enables the driving piece to move forwards to be in contact with the transmission piece or move backwards to be separated from the transmission piece; the driving piece is formed with half tooth of first kind and half tooth of second kind, and half tooth of first kind and half tooth of second kind all extend along the direction that is on a parallel with driving piece axis of rotation, and the front end protrusion of the half tooth of second kind of front end relative of half tooth of first kind on the direction that is on a parallel with the axis of rotation of driving piece, driving piece make driving piece and driving piece constitute transmission cooperation when removing to the driving piece easily to make the electric hammer realize engaging with a grade easily.

Description

Electric hammer

Technical Field

The embodiment of the utility model provides a relate to an instrument, concretely relates to electric hammer.

Background

The existing rotary tools can output impact while outputting torque, for example, an electric hammer can output reciprocating impact, torque or both. In order to enable the user to switch the desired operating mode as desired, relatively complex gear mechanisms and correspondingly actuated clutches are often provided in these power tools. The transmission mechanism usually includes two gears that can be engaged with or disengaged from each other by a clutch. However, with the existing gear structure, the problem of non-clamping is easily caused in the process that the two gears are close to each other to realize meshing.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides an electric hammer that realizes putting into gear easily.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

the electric hammer comprises a rotating component, a motor, a transmission component and a clutch device, wherein the rotating component is used for enabling the electric hammer to output rotating force, the motor is provided with a motor shaft, the transmission component is used for transmitting the power output by the motor to the rotating component, the transmission component further comprises a transmission part and a driving part, the transmission part and the rotating component form synchronous rotation, the driving part rotates when driven by the motor, and the clutch device can enable the driving part to move forwards along the central axis direction to be in contact with the transmission part so as to drive the transmission part to rotate or move backwards to be separated from the transmission part; the periphery of the driving piece is provided with a first half tooth and a second half tooth, wherein the first half tooth extends along the direction parallel to the rotation axis of the driving piece, and the second half tooth extends along the direction parallel to the rotation axis of the driving piece; the front ends of the first type of half-teeth project relative to the front ends of the second type of half-teeth in a direction parallel to the axis of rotation of the driver.

Further, the first type of half tooth has a first axial length in its direction of extension and the second type of half tooth has a second axial length in its direction of extension, wherein the first axial length is greater than the second axial length.

Further, the first type half-tooth is adjacent to the second type half-tooth.

The electric hammer further comprises an impact assembly, a central shaft, a swing rod bearing and a second driving piece, wherein the impact assembly is used for enabling the electric hammer to output impact force, the central shaft rotates around the central axis when driven by a motor, the swing rod bearing comprises a swing disc installed on the central shaft and a swing rod connected with the impact assembly, and the second driving piece drives the swing disc to rotate when in contact with the swing rod bearing; wherein, driving piece and second driving piece constitute synchronous rotation with the center pin respectively.

The electric hammer comprises a shell, an output piece, a motor, a transmission assembly and a clutch device, wherein the output piece is used for outputting power, the motor is contained in the shell, the transmission assembly is used for transmitting the output power of a prime mover to the output piece, the transmission assembly further comprises a transmission piece and a driving piece, the transmission piece drives the output piece to output power when being rotated, and the driving piece is rotated when being driven by the motor; the clutch device can enable the driving piece to move forwards along the central axis direction of the driving piece to be in contact with the transmission piece so as to drive the transmission piece to rotate or move backwards to be separated from the transmission piece; the periphery of the driving piece is provided with a first half tooth and a second half tooth, wherein the first half tooth extends along the direction parallel to the rotation axis of the driving piece, and the second half tooth extends along the direction parallel to the rotation axis of the driving piece; the front ends of the first type of half-teeth project relative to the front ends of the second type of half-teeth in a direction parallel to the axis of rotation of the driver.

Further, the second type half-tooth is adjacent to the first type half-tooth.

Including the second type half tooth that relative first type half tooth retracted into in the driving piece to the driving piece makes driving medium and driving piece constitute transmission cooperation easily when removing to the driving medium, and then makes the electric hammer realize the gear shifting easily.

Drawings

FIG. 1 is a schematic view of the structure of an electric hammer;

fig. 2 is a schematic view of the internal structure of the electric hammer of fig. 1;

FIG. 3 is a cross-sectional view of a portion of the structure of FIG. 2;

FIG. 4 is a schematic view of the driving member of FIG. 2 in contact with the driving member;

fig. 5 is a schematic view of the driving member of fig. 2 shown disengaged from the driving member.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The present invention provides a tool which may be, for example, the electric hammer 100 of fig. 1. As shown in fig. 1, the electric hammer 100 includes a housing 11, a switch 12, a battery pack 13, a motor 14, a transmission 15, a chuck 16, and a sub-handle 17.

The housing 11 forms an outer casing of the electric hammer 100, and is used for accommodating various components inside the electric hammer 100. The housing 11 includes a handle portion 111, a first accommodating portion 112, and a second accommodating portion 113. The handle portion 111 and the first accommodating portion 112 are disposed on the same side of the second accommodating portion 113, and the extending direction of the handle portion 111 and the extending direction of the first accommodating portion 112 are substantially parallel. Specifically, the handle portion 111 is for the user to hold, and is also provided at one end of the second accommodating portion 113. The first accommodating portion 112 is used for accommodating a circuit board therein, the first accommodating portion 112 is disposed at a substantially middle portion of the second accommodating portion 113, and an end of the first accommodating portion 112 away from the second accommodating portion 113 is also used for coupling the battery pack 13. The second accommodating portion 113 is for accommodating the motor 14, the transmission mechanism 15, and the like.

The switch 12 may be mounted on the handle part 111 near the second receiving part 113 so that a user can relatively conveniently trigger the switch 12 when holding the handle part 111, and the switch 12 may be a main switch for starting the motor 14.

The battery pack 13 is used to provide a power source for the electric hammer 100, and the battery pack 13 is detachably coupled to the first receiving portion 112.

The motor 14 is provided in the second accommodating portion 113 of the housing 11 as a prime mover of the electric hammer 100, and the motor 14 is configured to convert electric energy provided by the battery pack 13 into power and output the power to the transmission mechanism 15. For power tools, the electric machine 14 may be an electric motor of another type such as an engine. A transmission 15 is provided between the motor 14 and the chuck 16 for transmitting the power output from the motor 14 to an accessory such as a drill bit or a chisel bit.

The chuck 16 serves as an output member of the electric hammer 100, which is used for outputting power. Chuck 16 may also removably mount an accessory such as a drill bit, chisel bit, etc. to electric hammer 100.

The secondary handle 17 is used for the user to hold the handle portion 111 with one hand, and the other hand is used for holding the hammer 100 at two positions, i.e., front and rear positions, so that the center of gravity of the hammer 100 is located between the two hands, and the holding stability is improved.

As shown in fig. 2 and 3, the electric hammer 100 further includes a clutch device 18; the motor 14 includes a motor shaft 141; the transmission mechanism 15 includes a transmission assembly 20, a rotation assembly 25 and an impact assembly 26. The transmission assembly 20 is used to transmit power output from the motor 14 to the chuck 16, and further, it can transmit power to a rotating assembly 25 or an impact assembly 26 connected to the chuck 16. The transmission assembly 20 includes: a central shaft 19, a rocker bearing 21, a transmission 22, a driving element 23 and a second driving element 24. The clutch assembly 18 is used for switching the transmission mode of the transmission mechanism 15, the rotating assembly 25 is used for enabling the electric hammer 100 to output rotating force, and the impact assembly 26 is used for enabling the electric hammer 100 to output impact force.

The motor shaft 141 is rotatable about the motor axis 101, and the motor shaft 141 is formed with or fixedly connected to an output gear 141 a. The output gear 141a is used to output the power of the motor 14 to the center shaft 19.

The central shaft 19 extends substantially in a direction parallel to the central axis 102 of the motor axis 101, and an input gear 191 is further formed or fixedly connected to an end of the central shaft 19 near the motor shaft 141. The input gear 191 can be engaged with the output gear 141a of the motor shaft 141 such that when the motor 14 is started, the motor shaft 141 rotates about its motor axis 101, and the output gear 141a engages with the input gear 191 to drive the central shaft 19 to rotate about the central axis 102.

The swing lever bearing 21 includes a swing disk 211 and a swing lever 212. Wherein the swing plate 211 is mounted to the central shaft 19 and is rotatable relative to the central shaft 19, and the swing lever 212 is connected to the impact assembly 26. When the swing disc 211 of the swing rod bearing 21 rotates, the swing rod 212 drives the impact assembly 26 to reciprocate, so that power is output to accessories such as a drill bit and a chisel head, the accessories such as the drill bit and the chisel head are driven to impact a workpiece, and the function of chiseling of the electric hammer 100 is realized.

The driving member 22 and the rotating component 25 are configured to rotate synchronously, so that when the driving member 22 rotates, the chuck 16 can be driven to output power through the rotating component 25. Synchronous rotation means that when one of the transmission member 22 and the rotating member 25 rotates, the other rotates.

The drive member 23 and the second drive member 24 are both rotatable when driven by the motor 14, and specifically the drive member 23 and the second drive member 24 are each mounted to the central shaft 19 and each configured to rotate in synchronism with the central shaft 19. Wherein, the driving member 22 can be driven to rotate when the driving member 23 contacts with the driving member 22, and the swinging disk 211 can be driven to rotate when the second driving member 24 contacts with the swing rod bearing 21.

Thus, if the driving member 23 is in contact with the transmission member 22 and the second driving member 24 is disengaged from the rocker bearing 21 when the central shaft 19 rotates about the central axis 102, the rotating assembly 25 can drive the drill bit, chisel bit, etc. to rotate; if the driving member 23 is disengaged from the transmission member 22 and the second driving member 24 is in contact with the swing rod bearing 21, the impact assembly 26 can drive the drill bit, the chisel bit and other accessories to reciprocate; if the driving member 23 is in contact with the transmission member 22 and the second driving member 24 is in contact with the rocker bearing 21, then the rotating assembly 25 drives the drill bit, chisel bit, etc. to rotate while the impact assembly 26 drives the drill bit, chisel bit, etc. to reciprocate.

As shown in fig. 2, 4 and 5, the clutch device 18 can move the driving member 23 along its central axis to contact the transmission member 22 to drive the transmission member 22 to rotate, and the clutch device 18 can move the driving member 23 along its central axis to disengage from the transmission member 22.

As shown in fig. 4 to 5, the outer periphery of the driving member 23 is further formed with a first-type half tooth 222 and a second-type half tooth 223.

The first half-tooth 222 of the driver 23 extends in a direction parallel to the axis of rotation 106 of the driver 23 and the second half-tooth 223 extends in a direction parallel to the axis of rotation 106 of the driver 23.

Claims

1. An electric hammer, comprising:

the rotating assembly is used for enabling the electric hammer to output rotating force;

a motor formed with a motor shaft;

the transmission assembly is used for transmitting the power output by the motor to the rotating assembly;

the method is characterized in that:

the transmission assembly includes:

the transmission part and the rotating component form synchronous transmission;

a driving member rotated when driven by the motor;

the electric hammer also comprises a clutch device which can enable the driving piece to move forwards along the driving piece until the driving piece is contacted with the driving piece so as to drive the driving piece to rotate or move backwards until the driving piece is disengaged;

the periphery of the driving piece is provided with:

a first type of half-tooth extending in a direction parallel to the axis of rotation of the driver,

a second type of half-tooth extending in a direction parallel to the axis of rotation of the driver,

the front end of the first type half tooth is convex relative to the front end of the second type half tooth in the direction parallel to the central axis of the driving piece.

2. The electric hammer of claim 1, wherein: the first type of half tooth has a first axial length in its direction of extension and the second type of half tooth has a second axial length in its direction of extension, wherein the first axial length is greater than the second axial length.

3. The electric hammer of claim 2, wherein: the first type half-tooth is adjacent to the second type half-tooth.

4. An electric hammer, characterized in that: the transmission assembly is used for transmitting the output power of the prime mover to the output piece, and comprises a transmission piece and a driving piece, wherein the transmission piece drives the output piece to output the power when the transmission piece rotates, and the driving piece rotates when the driving piece is driven by the motor; the clutch device can enable the driving piece to move forwards along the central axis direction of the driving piece to be in contact with the transmission piece so as to drive the transmission piece to rotate or move backwards to be separated from the transmission piece; the periphery of the driving piece is provided with a first half tooth and a second half tooth, wherein the first half tooth extends along the direction parallel to the rotation axis of the driving piece, and the second half tooth extends along the direction parallel to the rotation axis of the driving piece; the front ends of the first type of half-teeth project relative to the front ends of the second type of half-teeth in a direction parallel to the axis of rotation of the driver.