CN209936838U

CN209936838U - Clutch and electric hammer with same

Info

Publication number: CN209936838U
Application number: CN201920289960.2U
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: 2019-03-07
Filing date: 2019-03-07
Publication date: 2020-01-14
Anticipated expiration: 2029-03-07

Abstract

The embodiment of the utility model discloses clutch, include: the guide piece, the first clutch piece, the second clutch piece, the rotating piece, the first elastic element and the second elastic element; the first clutch piece can slide relative to the guide piece, the second clutch piece can slide relative to the guide piece, the rotating piece can rotate relative to the guide piece by taking a first axis as a shaft, and the first elastic element comprises a first connecting leg and a second connecting leg; the second elastic element comprises a first pressure end and a second pressure end; wherein the rotating member is formed with a first supporting portion for contacting the first connecting leg and a second supporting portion for contacting the second connecting leg; an electric hammer with the clutch device is also disclosed. The clutch device occupies less space, adopts fewer parts and has lower cost.

Description

Clutch and electric hammer with same

Technical Field

The embodiment of the utility model provides a clutch, concretely relates to clutch of electric hammer is related to.

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 electric hammers. The existing clutches are different in switching and clutching modes, which undoubtedly influences the service life of parts and is not beneficial to users to quickly switch modes.

SUMMERY OF THE UTILITY MODEL

A clutch device, comprising: the guide piece, the first clutch piece, the second clutch piece, the rotating piece, the first elastic element and the second elastic element; the first clutch piece can slide relative to the guide piece, the second clutch piece can slide relative to the guide piece, the rotating piece can rotate relative to the guide piece by taking a first axis as a shaft, and the first elastic element comprises a first connecting leg and a second connecting leg which are respectively connected with the first clutch piece and the second clutch piece; the second elastic element comprises a first pressure end and a second pressure end which are respectively connected with the first driving piece and the second driving piece; wherein the rotating member is formed with a first supporting portion for contacting the first connecting leg and a second supporting portion for contacting the second connecting leg; when the rotating piece rotates by taking the first axis as a shaft, the first supporting part drives the first connecting leg to enable the first clutch piece to slide relative to the guide piece, and the second supporting part drives the second connecting leg to enable the second clutch piece to slide relative to the guide piece; in addition, the second elastic element is provided with a first pressure end and a second pressure end which are respectively contacted with the first driving piece and the second driving piece, so that the first driving piece and the second driving piece can slide relative to the central shaft.

Further, the first support part includes: a first support surface parallel to the first axis; the second support portion includes: a second bearing surface parallel to the first axis.

Further, the first supporting surface includes: a first distal contact point, a first proximal contact point, and a mid-terminal contact point; the first connecting leg being furthest from the first axis when the first connecting leg is contacted by the first distal contact point; the first connecting leg being closest to the first axis when the first connecting leg is contacted by the first proximal contact point; the first connection leg being located between the first distal and first proximal axial positions when the first connection leg is contacted by the mid-end contact point; the second support surface includes: a second distal contact point and a second proximal contact point; the second connecting leg being furthest from the first axis when the second connecting leg is contacted by the second distal contact point; the second connecting leg is closest to the first axis when the second connecting leg is contacted by the second proximal contact point.

Further, the first supporting surface includes: the first far-end contact point is at least arranged on the first revolution body surface; the second support surface includes: the second far-end contact point is at least arranged on the second revolution body surface.

Further, the first connecting leg and the second connecting leg are on both sides of the rotating member, and their positions in the axial direction of the first axis correspond to the positions of the first supporting surface and the second supporting surface, respectively.

Further, the first connecting leg includes: a first support section and a first drive section; the first support section extends along a straight line direction, and the first driving section extends along a direction which is vertical to the first support section and a plane direction.

Further, the second connecting leg comprises: the second supporting section, the second connecting section and the second driving section; the second support section extends along a straight line direction, and the second connecting section extends along a direction perpendicular to the second support section; the second driving section extends in a direction approximately perpendicular to a plane formed by the second supporting section and the second connecting section; the second connecting section is bent in the direction opposite to the first connecting leg relative to the second supporting section.

The electric hammer comprises a rotating assembly, a motor, a transmission assembly and a clutch device, wherein the rotating assembly is used for enabling the electric hammer to output rotating force, the motor is provided with a motor shaft, 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 rotate synchronously, the driving piece rotates when being driven by the motor, and the clutch device enables the driving piece to move forwards and backwards along the central axis direction of a central shaft, so that different functions are switched.

The embodiment of the utility model provides a have following advantage:

the embodiment of the utility model discloses clutch and have this clutch's electric hammer, this clutch's volume is less, and the part of adoption is few, and is with low costs moreover.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic structural diagram of an electric hammer according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of an electric hammer according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a partial structure of an electric hammer according to an embodiment of the present invention;

fig. 4 is a perspective view of a clutch device according to an embodiment of the present invention;

fig. 5 is a perspective view of a rotating member of a clutch device according to an embodiment of the present invention;

fig. 6 is a perspective view of an elastic element of a clutch device according to an embodiment of the present invention;

fig. 7 is a perspective view of the first clutch member, the second clutch member, the first driving member and the second driving member according to the embodiment of the present invention;

fig. 8 is a perspective view of the first driving member, the second driving member and the second elastic element according to the embodiment of the present invention.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

The present invention provides a power 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 the driving member 22, and the swinging disk 211 can be driven to rotate when the second driving member 24 contacts 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.

The construction of the clutch device 18 and how it allows the positions of the drive member 23 and the second drive member 24 to be changed will be described in detail below;

as shown in fig. 4, the clutch device 18 includes: a guide member 27, a first clutch member 28, a second clutch member 29, a rotation member 31, a first elastic element 32, and a second elastic element 33.

The guide 27 is a guide rod that is oriented generally parallel to the motor axis 101. The guide 27 is fixed in position relative to the housing 11 within the housing 11. The first clutch member 28 is slidable relative to the guide member 27, and the second clutch member 29 is also slidable relative to the guide member 27. The rotating member 31 is rotatable about a first axis 103 perpendicular to the motor axis 101, and the rotating member 31 has a first support portion 311 and a second support portion 312 formed thereon. The first elastic member 32 includes a first connecting leg 321, a second connecting leg 322, and an elastic connection part 323 connecting the first connecting leg 321 and the second connecting leg 322. The first connecting leg 321 contacts the first supporting portion 311, the second connecting leg 322 contacts the second supporting portion 312, the first connecting leg 321 and the second connecting leg 322 respectively contact the first supporting portion 311 and the second supporting portion 312 from two sides of the first axis 103, the second elastic element 33 is a spring member, the spring member is located between the first driving member 23 and the second driving member 24, and the first pressure end 331 and the second pressure end 332 respectively contact the first driving member supporting portion 232 and the second driving member supporting portion 242.

More specifically, as shown in fig. 4 and 5, with respect to the rotating member 31, the first supporting portion 311 and the second supporting portion 312 are respectively provided at different axial positions of the rotating member 31 in the direction of the first axis 103.

The first supporting portion 311 is used for contacting the first connecting leg 321, and the first supporting portion 311 is disposed at a first axial position. The first support portion 311 further includes a middle contact point 311a, the middle contact point 311a further substantially partially surrounds the first axis 103, and the middle contact point 311a is further formed with a first distal contact point 311b and a first proximal contact point 311c at different circumferential positions thereof. Wherein the first distal contact point 311b is further from the first axis 103 than the first proximal contact point 311c and the middle contact point 311a, such that when the first connecting leg 321 contacts the first distal contact point 311b, the first connecting leg 321 is farthest from the first axis 103, and when the first connecting leg 321 contacts the first proximal contact point 311c, the first connecting leg 321 is closest to the first axis 103. Likewise, when the first connecting leg is in contact with the mid-end contact point 311a, the first connecting leg axial position is intermediate the first proximal end and the first distal contact point axial position.

The second supporting portion 312 is used for contacting the second connecting leg 322, and the second supporting portion 312 is disposed at a second axial position. The second support portion 312 further includes a second proximal contact point 312a, and the second proximal contact point 312a is further formed with a second distal contact point 312b at a different circumferential position thereof such that when the second coupling leg 322 is in contact with the second distal contact point 312b, the second coupling leg 322 is farthest from the first axis 103, and when the second coupling leg 322 is in contact with the second proximal contact point 312a, the second coupling leg 322 is closest to the first axis 103.

Also, the first and second connecting

legs

321 and 322 are respectively disposed at both sides of the rotation member 31 in the direction of the first axis 103.

As shown in fig. 4 and 6, the first elastic member 32 is a torsion spring, and the first and second connecting

legs

321 and 322 are formed at both ends of the torsion spring, respectively.

The first connecting leg 321 includes a first supporting section 321a, a first driving section 321c, and the second connecting leg 322 includes a second supporting section 322a, a second connecting section 322b, and a second driving section 322 c.

The first supporting section 321a extends along a straight direction, and one end of the first supporting section 321a is connected to the elastic connection part 323 and the other end is connected to the first driving section 321 c. The first driving section 321c extends along the first supporting section 321a substantially in the vertical and planar directions, and one end of the first driving section 321c is connected to the first supporting section 321a and the other end is connected to the first clutch 28.

The second supporting section 322a extends in one linear direction, and one end of the second supporting section 322a is connected to the elastic connection part 323 and the other end is connected to the second connection section 322 b. The second connecting section 322b extends substantially in a direction perpendicular to the second supporting section 322a, and is bent from the second supporting section 322a toward an opposite direction of the first connecting leg 321. The second connecting section 322b has one end connected to the second supporting section 322a and the other end connected to the second driving section 322 c. The second driving section 322c extends substantially perpendicular to the plane formed by the second supporting section 322a and the second connecting section 322b, and one end of the second driving section 322c is connected to the second connecting section 322b and the other end is connected to the second clutch member 29.

As shown in fig. 2, 3, 4 and 7, the first clutch member 28 is formed with a first sliding portion 281 and a first driving portion 282, and the first sliding portion 281 is formed with a first through hole 281a and a first support position 281 b. The second clutch 29 is formed with a second sliding portion 291 and a second driving portion 292, and the second sliding portion 291 is formed with a second through hole 291a and a second support portion 291 b. The guide rods pass through the first through-holes 281a of the first clutch member 28 and the second through-holes 291a of the second clutch member 29 so that the first clutch member 28 and the second clutch member 29 move in a direction parallel to the guide rods, the first driving section 321c of the first connecting leg 321 protrudes into and is adjacent to the first supporting location 281b of the first clutch member 28, and the second driving section 322c of the second connecting leg 322 protrudes into and is adjacent to the second supporting location 291b of the second clutch member 29, so that the first connecting leg 321 and the second connecting leg 322 can drive the first clutch member 28 and the second clutch member 29 to move. The first drive portion 282 is adapted to cooperate with the driver 23 and the second drive portion 292 is adapted to cooperate with the second driver 24. The first coupling leg 321 is capable of driving the first clutch member 28 to move in the direction 105 along the central axis 102, and the second coupling leg 322 is also capable of driving the second clutch member 29 to move in the direction 104 along the central axis 102.

The driving member 23 and the second driving member 24 are respectively formed with a clutch portion capable of engaging with the clutch device 18, specifically, the clutch portion of the driving member 23 is a first annular groove 231 formed on the driving member 23, the clutch portion of the second driving member 24 is a second annular groove 241 formed on the second driving member 24, the first driving portion 282 is embedded in the first annular groove 231, and the second driving portion 292 is embedded in the second annular groove 241, so that the first driving portion 282 can drive the driving member 23 to move along the central axis 102 to the 105 direction and the second driving portion 292 can drive the second driving member 24 to move along the central axis 102 to the 104 direction.

As shown in fig. 2, 3, 4, and 8, a second elastic element 33 is disposed between the first driving element and the second driving element, the second elastic element 33 is a spring member, the spring member is located between the first driving element 23 and the second driving element 24, and the first pressure end 331 and the second pressure end 332 are respectively in contact with the first driving element supporting portion 232 and the second driving element supporting portion 242, so that the driving element 23 moves along the central axis 102 toward the 104 direction, the driving element 23 can be in contact with the driving element 22, and the second driving element 24 moves along the central axis 102 toward the 105 direction, so that the driving element 24 is in contact with the swing rod bearing 21, thereby achieving different functions.

The rotating member 31 is disposed between the first connecting leg 321 and the second connecting leg 322, the rotating member 31 can rotate around the first axis 103, and when rotating, the first supporting portion 311 drives the first connecting leg 321 to move the first clutch member 28 along the central axis 102 toward 105; the second support portion 312 drives the second connecting leg 322 to move the second clutch member 29 along the central axis 102 in the direction 104, so as to disengage the driving member 23 from the transmission member 22, and disengage the second driving member 24 from the rocker bearing 21, thereby achieving different functions.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A clutch device, comprising: a guide member; a first clutch member slidable relative to the guide member; a second clutch member slidable relative to the guide member; the method is characterized in that: the clutch device further includes: a rotating member: can rotate relative to the guide piece by taking a first axis as a shaft; an elastic element: a first resilient element comprising two first and second connection legs connected to the first and second clutch members, respectively; the second elastic element comprises a first pressure end and a second pressure end, the first pressure end is connected with the first driving piece, and the second pressure end is connected with the second driving piece; wherein the rotating member is formed with: a first support portion for contacting the first connection leg; a second support portion for contacting the second connecting leg; the first supporting part is arranged at a first axial position of the first axis; the second supporting part is arranged at a second axial position of the first axis; when the rotating piece rotates by taking the first axis as a shaft, the first supporting part drives the first connecting leg to enable the first clutch piece to slide relative to the guide piece, and the second supporting part drives the second connecting leg to enable the second clutch piece to slide relative to the guide piece.

2. The clutched device of claim 1, wherein: the first support portion includes: a first support surface parallel to the first axis; the second support portion includes: a second support surface parallel to the first axis.

3. The clutched device of claim 2, wherein: the first support surface includes: a first distal contact point and a first proximal contact point and a middle contact point; the first connecting leg being furthest from the first axis when the first connecting leg is contacted by the first distal contact point; the first connection leg being closest to the first axis when the first connection leg is contacted by the first proximal contact point; the first connection leg is positioned between a first distal end and a first proximal end when the first connection leg is contacted by the mid-end contact point; the second support surface includes: a second distal contact point and a second proximal contact point; the second connecting leg being furthest from the first axis when the second connecting leg is contacted by the second distal contact point; the second connecting leg is closest to the first axis when the second connecting leg is contacted by the second proximal contact point.

4. A clutched device as claimed in claim 3, wherein: the first supporting surface is approximately an umbrella-shaped body surface; the first far-end contact point is at least provided with a first revolution body surface, and the first near-end contact point is approximately vertical to the middle-end contact point; the second support surface includes: the second supporting surface is approximately a semicircular surface; the second distal contact point is provided with at least a second swivel surface.

5. The clutch device according to any one of claims 1 to 4, characterized in that: the first connecting leg and the second connecting leg are arranged on two sides of the rotating piece, and the positions of the first connecting leg and the second connecting leg in the axial direction of the first axis correspond to the positions of the first supporting surface and the second supporting surface respectively.

6. The clutched device of claim 5, wherein: the first connecting leg includes: a first support section extending substantially in a linear direction; the first driving section extends along the vertical and plane directions of the first supporting section.

7. The clutched device of claim 5, wherein: the second connecting leg comprises: a second support section extending substantially in a linear direction; a second connecting section extending substantially in a direction perpendicular to the second support section; the second driving section extends approximately perpendicular to the plane direction formed by the second supporting section and the second connecting section; the second connecting section is bent towards the direction opposite to the first connecting leg relative to the second supporting section.

8. The clutched device of claim 1, wherein: the second elastic element is formed with: a first pressure end and a second pressure end; a first pressure end for contact by the first driver; a second pressure end for contact by the second driver; the motor axis is provided with a central axis, and the first pressure end is arranged at a first axial position of the central axis; the second pressure end is arranged at a second axial position of the central axis; when the clutch device moves along the central axis, the first pressure end drives the first driving member to enable the first driving member to slide relative to the central axis, and the second pressure end drives the second driving member to enable the second driving member to slide relative to the central axis.

9. An electric hammer, characterized in that it comprises: a rotating assembly for causing the electric hammer to output a rotational force; the impact assembly is used for enabling the electric hammer to output impact force; a motor formed with a motor shaft; the transmission assembly is used for transmitting the output power of the motor to the rotating assembly; the electric hammer further comprises a clutch device according to any one of claims 1 to 8.