A clutch device and an electric hammer having the clutch device

Abstract

The embodiment of the present invention discloses a clutch device, including: a guide member, a first clutch member, a second clutch member, a rotating member, a first elastic element, and a second elastic element; the first clutch member can slide relative to the guide member, the second clutch member can slide relative to the guide member, the rotating member can rotate relative to the guide member with the first axis as the axis, the first elastic element includes a first connecting leg and a second connecting leg; the second elastic element includes a first pressure end and a second pressure end; wherein the rotating member is formed with a first support portion and a second support portion, the first support portion is used to contact the first connecting leg, and the second support portion is used to contact the second connecting leg; and an electric hammer having the clutch device is also disclosed. The clutch device occupies less space, uses fewer parts, and has a lower cost.

Description

Technical Field

[0001] The embodiment of the present invention relates to a clutch device, and in particular to a clutch device for an electric hammer. Background Art

[0002] Existing rotary tools can often output impact while outputting torque. For example, an electric hammer can output both reciprocating impact and torque or both at the same time. In order to enable users to switch the required working mode according to their needs, these electric hammers are often equipped with a relatively complex transmission mechanism and a corresponding clutch for operation. Existing clutches have different switching modes, which undoubtedly affects the service life of the parts and is not conducive to users to quickly switch modes. Summary of the invention

[0003] A clutch device comprises: a guide member, a first clutch member, a second clutch member, a rotating member, a first elastic element, and a second elastic element; the first clutch member can slide relative to the guide member, the second clutch member can slide relative to the guide member, and the rotating member can rotate relative to the guide member with a first axis as the axis, the first elastic element comprises two first connecting legs and a second connecting leg respectively connected to the first clutch member and the second clutch member; the second elastic element comprises a first pressure end and a second pressure end respectively connected to the first driving member and the second driving member; wherein the rotating member is formed with a first supporting portion and a second supporting portion, the first supporting portion is used to contact with the first connecting leg, and the second supporting portion is used to contact with the second connecting leg; when the rotating member rotates with the first axis as the axis, the first supporting portion drives the first connecting leg to make the first clutch member slide relative to the guide member, and the second supporting portion drives the second connecting leg to make the second clutch member slide relative to the guide member; in addition, the second elastic element is formed with a first pressure end and a second pressure end respectively contacting the first driving member and the second driving member, so that the first driving member and the second driving member slide relative to the central axis.

[0004] Further, 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.

[0005] Further, the first support surface includes: a first distal contact point, a first proximal contact point and a mid-end contact point; when the first connecting leg is contacted by the first distal contact point, the first connecting leg is farthest from the first axis; when the first connecting leg is contacted by the first proximal contact point, the first connecting leg is closest to the first axis; when the first connecting leg is contacted by the mid-end contact point, the first connecting leg is located between the first distal and first proximal axial positions; the second support surface includes: a second distal contact point and a second proximal contact point; when the second connecting leg is contacted by the second distal contact point, the second connecting leg is farthest from the first axis; when the second connecting leg is contacted by the second proximal contact point, the second connecting leg is closest to the first axis.

[0006] Furthermore, the first support surface includes: a generally umbrella-shaped surface, and the first distal contact point is at least arranged on the first rotating surface; the second support surface includes: a generally semicircular surface, and the second distal contact point is at least arranged on the second rotating surface.

[0007] 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.

[0008] Furthermore, the first connecting leg includes: a first supporting section and a first driving section; the first supporting section extends approximately in a straight line direction, and the first driving section extends approximately in a direction perpendicular to and in a plane with respect to the first supporting section.

[0009] Furthermore, the second connecting leg includes: a second supporting section, a second connecting section and a second driving section; the second supporting section extends approximately in a straight direction, and the second connecting section extends approximately in a direction perpendicular to the second supporting section; the second driving section extends approximately perpendicular to the second supporting section and the second connecting section to form a plane; the second connecting section is bent in a direction opposite to the first connecting leg relative to the second supporting section.

[0010] An electric hammer comprises: a rotating assembly, a motor, a transmission assembly and a clutch device, wherein the rotating assembly is used to make the electric hammer output a rotating force, the motor is formed with a motor shaft, the transmission assembly is used to transmit the power output by the motor to the rotating assembly, the transmission assembly also comprises a transmission member and a driving member, the transmission member and the rotating assembly constitute synchronous rotation, the driving member rotates when driven by the motor, and the clutch device can make the driving member move forward and backward along the central axis direction of the central shaft, thereby realizing different function switching.

[0011] The embodiments of the present invention have the following advantages:

[0012] The embodiment of the invention discloses a clutch device and an electric hammer having the clutch device. The clutch device has a small volume, uses fewer parts and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0014] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0015] Figure 1 A schematic diagram of the structure of an electric hammer provided by an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the internal structure of an electric hammer provided by an embodiment of the present invention;

[0017] Figure 3 A cross-sectional view of a partial structure of an electric hammer provided by an embodiment of the present invention;

[0018] Figure 4 A three-dimensional diagram of a clutch device provided in an embodiment of the present invention;

[0019] Figure 5 A three-dimensional diagram of a rotating member of a clutch device provided in an embodiment of the present invention;

[0020] Figure 6 A three-dimensional diagram of an elastic element of a clutch device provided in an embodiment of the present invention;

[0021] Figure 7 A three-dimensional diagram of a first clutch member, a second clutch member, a first driving member, and a second driving member provided in an embodiment of the present invention;

[0022] Figure 8 A three-dimensional diagram of a first driving member, a second driving member, and a second elastic element provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example

[0025] The present invention provides a power tool, which can be, for example, Figure 1 The electric hammer 100. Figure 1As shown, the electric hammer 100 includes a housing 11 , a switch 12 , a battery pack 13 , a motor 14 , a transmission mechanism 15 , a chuck 16 and an auxiliary handle 17 .

[0026] The housing 11 forms the outer shell of the electric hammer 100, which is used to accommodate the various components inside the electric hammer 100. The housing 11 includes: a handle 111, a first accommodating portion 112 and a second accommodating portion 113. The handle 111 and the first accommodating portion 112 are arranged on the same side of the second accommodating portion 113, and the extension direction of the handle 111 and the first accommodating portion 112 is substantially parallel. Specifically, the handle 111 is used for the user to hold, and it is also arranged at one end of the second accommodating portion 113. The first accommodating portion 112 is used to accommodate the circuit board, and the first accommodating portion 112 is arranged at the approximately middle part of the second accommodating portion 113. The end of the first accommodating portion 112 away from the second accommodating portion 113 is also used to combine with the battery pack 13. The second accommodating portion 113 is used to accommodate the motor 14 and the transmission mechanism 15, etc.

[0027] The switch 12 can be installed on the handle portion 111 and close to the second accommodating portion 113, so that the user can trigger the switch 12 relatively conveniently when holding the handle portion 111. The switch 12 can be a main switch for starting the motor 14.

[0028] The battery pack 13 is used to provide an energy source for the electric hammer 100 , and the battery pack 13 can be detachably coupled to the first accommodation portion 112 .

[0029] The motor 14 is a prime mover of the electric hammer 100, and is disposed in the second receiving portion 113 of the housing 11. The motor 14 is used to convert the electric energy provided by the battery pack 13 into power output to the transmission mechanism 15. For electric tools, the motor 14 can also be an engine or other form of electric motor. The transmission mechanism 15 is disposed between the motor 14 and the chuck 16, and is used to transmit the power output by the motor 14 to accessories such as drill bits and chisel bits.

[0030] The chuck 16 is used as an output part of the electric hammer 100 for outputting power. The chuck 16 can also detachably mount accessories such as a drill bit and a chisel bit on the electric hammer 100.

[0031] The auxiliary handle 17 is used for the user to hold the handle portion 111 with one hand while the other hand holds it. In this way, the two hands roughly hold the front and rear positions of the entire electric hammer 100 respectively, so that the center of gravity of the electric hammer 100 is roughly located between the two hands, thereby improving the stability of holding.

[0032] like Figure 2 and Figure 3As shown, the electric hammer 100 also includes: a clutch device 18; the motor 14 includes: a motor shaft 141; the transmission mechanism 15 includes: a transmission assembly 20, a rotating assembly 25 and an impact assembly 26. The transmission assembly 20 is used to transmit the power output by the motor 14 to the chuck 16, and further, it can transmit the power to the rotating assembly 25 or the impact assembly 26 connected to the chuck 16. The transmission assembly 20 includes: a central shaft 19, a rocker bearing 21, a transmission member 22, a driving member 23 and a second driving member 24. Among them, the clutch 18 is used to realize the switching of the transmission mode of the transmission mechanism 15, the rotating assembly 25 is used to make the electric hammer 100 output a rotating force, and the impact assembly 26 is used to make the electric hammer 100 output an impact force.

[0033] The motor shaft 141 can rotate around the motor axis 101 , and an output gear 141 a is formed or fixedly connected to the motor shaft 141 . The output gear 141 a is used to output the power of the motor 14 to the central shaft 19 .

[0034] 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 formed or fixedly connected at one end of the central shaft 19 close to the motor shaft 141. The input gear 191 can mesh with the output gear 141a of the motor shaft 141, so that when the motor 14 is started, the motor shaft 141 rotates with its motor axis 101 as the axis, and at this time, the output gear 141a meshes with the input gear 191, thereby driving the central shaft 19 to rotate with the central axis 102 as the axis.

[0035] The swing bar bearing 21 includes: a swing plate 211 and a swing rod 212. The swing plate 211 is mounted on the central shaft 19 and can rotate relative to the central shaft 19, and the swing rod 212 is connected to the impact assembly 26. When the swing plate 211 of the swing bar bearing 21 rotates, the swing rod 212 drives the impact assembly 26 to reciprocate, thereby outputting power to accessories such as drill bits and chisel bits, driving the drill bits and chisel bits and other accessories to impact the workpiece, thereby realizing the chiseling function of the electric hammer 100.

[0036] The transmission member 22 and the rotating assembly 25 form synchronous rotation, so that when the transmission member 22 rotates, the chuck 16 can be driven to output power through the rotating assembly 25. Wherein, synchronous rotation means that when one of the transmission member 22 and the rotating assembly 25 rotates, the other also rotates accordingly.

[0037] The driving member 23 and the second driving member 24 can both rotate when driven by the motor 14. Specifically, the driving member 23 and the second driving member 24 are respectively mounted on the central shaft 19 and respectively rotate synchronously with the central shaft 19. When the driving member 23 contacts the transmission member 22, the transmission member 22 can be driven to rotate, and when the second driving member 24 contacts the swing rod bearing 21, the swing plate 211 can be driven to rotate.

[0038] Therefore, when the center shaft 19 rotates around the center axis 102, 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, then the rotating assembly 25 can drive the drill bit, chisel head and other accessories to rotate; and if the driving member 23 is disengaged from the transmission member 22 and the second driving member 24 is in contact with the rocker bearing 21, then the impact assembly 26 can drive the drill bit, chisel head and other accessories to reciprocate; and 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 head and other accessories to rotate and the impact assembly 26 drives the drill bit, chisel head and other accessories to reciprocate.

[0039] The following specifically describes the structure of the clutch device 18 and how it changes the positions of the driving member 23 and the second driving member 24;

[0040] like Figure 4 As shown, the clutch device 18 includes: a guide member 27 , a first clutch member 28 , a second clutch member 29 , a rotating member 31 , a first elastic element 32 and a second elastic element 33 .

[0041] The guide member 27 is a guide rod, and the guide rod is generally parallel to the direction of the motor axis 101. The guide member 27 is fixed in the housing 11 relative to the housing 11. The first clutch member 28 can slide relative to the guide member 27, and the second clutch member 29 can also slide relative to the guide member 27. The rotating member 31 can rotate around the first axis 103 perpendicular to the motor axis 101, and a first supporting portion 311 and a second supporting portion 312 are formed on the rotating member 31. The first elastic element 32 includes a first connecting leg 321, a second connecting leg 322, and an elastic connecting portion 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, and the first connecting leg 321 and the second connecting leg 322 contact the first supporting portion 311 and the second supporting portion 312 respectively from both 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 contact the first driving member support portion 232 and the second driving member support portion 242 respectively.

[0042] More specifically, Figure 4 and 5 As shown, for the rotating member 31 , in the direction of the first axis 103 , the first supporting portion 311 and the second supporting portion 312 are respectively arranged at different axial positions of the rotating member 31 .

[0043] The first support portion 311 is used to contact the first connecting leg 321, and the first support portion 311 is set at a first axial position. The first support portion 311 also includes a middle contact point 311a, which also roughly partially surrounds the first axis 103. The middle contact point 311a also forms a first distal contact point 311b and a first proximal contact point 311c at different circumferential positions. The first distal contact point 311b is farther from the first axis 103 than the first proximal contact point 311c and the middle contact point 311a. In this way, 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 contacts the middle contact point 311a, the axial position of the first connecting leg is located between the axial positions of the first proximal and first distal contact points.

[0044] The second support portion 312 is used to contact the second connection leg 322, and the second support portion 312 is arranged at a second axial position. The second support portion 312 also 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, so that when the second connection leg 322 contacts the second distal contact point 312b, the second connection leg 322 is farthest from the first axis 103, and when the second connection leg 322 contacts the second proximal contact point 312a, the second connection leg 322 is closest to the first axis 103.

[0045] Moreover, the first connecting leg 321 and the second connecting leg 322 are respectively disposed on two sides of the rotating member 31 and in the direction of the first axis 103 .

[0046] like Figure 4 and 6 The first elastic element 32 is a torsion spring, and a first connecting leg 321 and a second connecting leg 322 are respectively formed at two ends of the torsion spring.

[0047] The first connecting leg 321 includes a first supporting section 321a and 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 322c.

[0048] The first support segment 321a extends in a straight line direction, one end of the first support segment 321a is connected to the elastic connection portion 323, and the other end is connected to the first driving segment 321c. The first driving segment 321c extends substantially in a vertical and planar direction to the first support segment 321a, one end of the first driving segment 321c is connected to the first support segment 321a, and the other end is connected to the first clutch member 28.

[0049] The second support segment 322a extends in a straight line direction, one end of the second support segment 322a is connected to the elastic connecting portion 323, and the other end is connected to the second connecting segment 322b. The second connecting segment 322b extends substantially in a direction perpendicular to the second support segment 322a, and is bent from the second support segment 322a in the opposite direction to the first connecting leg 321. One end of the second connecting segment 322b is connected to the second support segment 322a, and the other end is connected to the second driving segment 322c. The second driving segment 322c extends substantially in a direction perpendicular to the second support segment 322a and the plane formed by the second connecting segment 322b, one end of the second driving segment 322c is connected to the second connecting segment 322b, and the other end is connected to the second clutch member 29.

[0050] like Figure 2 , 3 As shown in FIGS. 4 and 7, the first clutch 28 is formed with a first sliding portion 281 and a first driving portion 282, and a first through hole 281a and a first supporting position 281b are formed on the first sliding portion 281. The second clutch 29 is formed with a second sliding portion 291 and a second driving portion 292, and a second through hole 291a and a second supporting position 291b are formed on the second sliding portion 291. The guide rod passes through the first through hole 281a of the first clutch 28 and the second through hole 291a of the second clutch 29, so that the first clutch 28 and the second clutch 29 move in a direction parallel to the guide rod, and the first driving section 321c of the first connecting leg 321 extends into and approaches the first supporting position 281b of the first clutch 28, and the second driving section 322c of the second connecting leg 322 extends into and approaches the second supporting position 291b of the second clutch 29, so that the first connecting leg 321 and the second connecting leg 322 can drive the first clutch 28 and the second clutch 29 to move. The first driving part 282 is used to cooperate with the driving member 23, and the second driving part 292 is used to cooperate with the second driving member 24. The first connecting leg 321 can drive the first clutch member 28 to move along the central axis 102 to the direction 105, and the second connecting leg 322 can drive the second clutch member 29 to move along the central axis 102 to the direction 104.

[0051] The driving member 23 and the second driving member 24 are respectively formed with a clutch part that can cooperate with the clutch device 18. Specifically, the clutch part of the driving member 23 is a first annular groove 231 formed on the driving member 23, and the clutch part of the second driving member 24 is a second annular groove 241 formed on the second driving member 24. The first driving part 282 is embedded in the first annular groove 231, and the second driving part 292 is embedded in the second annular groove 241, so that the first driving part 282 can drive the driving member 23 to move along the central axis 102 in the direction of 105 and the second driving part 292 can drive the second driving member 24 to move along the central axis 102 in the direction of 104.

[0052] like Figure 2 , 3 , 4, 8, a second elastic element 33 is provided between the first driving member and the second driving member, and the second elastic element 33 is a spring member, which 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 are respectively in contact with the first driving member support portion 232 and the second driving member support portion 242, so that the driving member 23 moves along the central axis 102 to the direction 104, and can make the driving member 23 contact with the transmission member 22, and the second driving member 24 moves along the central axis 102 to the direction 105, so that the driving member 24 is in contact with the rocker bearing 21, thereby realizing different functions.

[0053] The rotating member 31 is arranged 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 support portion 311 drives the first connecting leg 321 to move the first clutch member 28 along the center axis 102 toward 105; the second support portion 312 drives the second connecting leg 322 to move the second clutch member 29 along the center axis 102 toward 104, thereby disengaging the driving member 23 from the transmission member 22, and disengaging the second driving member 24 from the rocker bearing 21, thereby realizing different functions.

[0054] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A clutch device, comprising: Guides; A first clutch member capable of sliding relative to the guide member; The second clutch member can slide relative to the guide member; it is characterized in that: the clutch device also includes: a rotating member: can rotate relative to the guide member with the first axis as the axis; an elastic element: the first elastic element includes two first connecting legs and a second connecting leg respectively connected to the first clutch member and the second clutch member; the second elastic element includes two first pressure ends and a second pressure ends respectively contacting the first driving member and the second driving member; wherein, the rotating member is formed with: a first supporting portion for contacting the first connecting leg; a second supporting portion for contacting the second connecting leg; the first supporting portion is arranged at a first axial position of the first axis; the second supporting portion is arranged at a second axial position of the first axis; when the rotating member rotates with the first axis as the axis, the first supporting portion drives the first connecting leg to make the first clutch member slide relative to the guide member, and the second supporting portion drives the second connecting leg to make the second clutch member slide relative to the guide member; 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; The first connecting leg and the second connecting leg are located at 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; The first connecting leg comprises: a first supporting section extending substantially in a straight line direction; a first driving section extending substantially in a direction perpendicular to the first supporting section; The second connecting leg comprises: a second supporting section extending substantially in a straight line direction; a second connecting section extending substantially in a direction perpendicular to the second supporting section; a second driving section extending substantially perpendicular to a plane formed by the second supporting section and the second connecting section; the second connecting section extending in a direction away from the first connecting leg relative to the second supporting section, and the second supporting section is perpendicular to the second connecting section; The second elastic element is formed with: a first pressure end and a second pressure end; the first pressure end is used to contact the first driving member; the second pressure end is used to contact the second driving member; the first pressure end is arranged at a first axial position of the central axis, and the central axis is the axis of the central axis of the transmission component; the second pressure end is arranged at a second axial position of the central axis; when the clutch device moves with the central axis, the first pressure end drives the first driving member to slide relative to the central axis, and the second pressure end drives the second driving member to slide relative to the central axis.

2. The clutch device according to claim 1, characterized in that: The first supporting surface includes: a first distal contact point, a first proximal contact point and a middle contact point; when the first connecting leg is contacted by the first distal contact point, the first connecting leg is farthest from the first axis; when the first connecting leg is contacted by the first proximal contact point, the first connecting leg is closest to the first axis; when the first connecting leg is contacted by the middle contact point, the first connecting leg is located between the first distal end and the first proximal end; the second supporting surface includes: a second distal contact point and a second proximal contact point; when the second connecting leg is contacted by the second distal contact point, the second connecting leg is farthest from the first axis; when the second connecting leg is contacted by the second proximal contact point, the second connecting leg is closest to the first axis.

3. An electric hammer, comprising: A rotating assembly, used to enable the electric hammer to output a rotating force; An impact assembly, used to enable the electric hammer to output an impact force; A motor having a motor shaft; a transmission assembly for transmitting the motor output power to the rotating assembly; and the electric hammer further comprising the clutch device according to any one of claims 1 to 2.

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