CN210436096U

CN210436096U - Clutch structure for switching functions of electric hammer and electric hammer

Info

Publication number: CN210436096U
Application number: CN201921216115.9U
Authority: CN
Inventors: 李美龙
Original assignee: Zhejiang Province Yongkang City Jindu Industry And Trade Co ltd
Current assignee: Zhejiang Province Yongkang City Jindu Industry And Trade Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-05-01
Anticipated expiration: 2029-07-30

Abstract

The utility model provides a separation and reunion structure and electric hammer for electric hammer function switches belongs to electric work instrument technical field. The electric hammer solves the problems that an existing electric hammer function switching mechanism is complex and not easy to implement. The knob can drive the first clutch piece to move along the central shaft through the first transmission mechanism so as to separate the first clutch piece from an impact assembly of the electric hammer, the knob can drive the second clutch piece to move along the central shaft through the second transmission mechanism so as to separate the second clutch piece from a rotating assembly of the electric hammer, and the retaining structure respectively drives the first clutch piece and the second clutch piece to move along the central shaft through the first transmission mechanism and the second transmission mechanism and can be respectively combined with the impact assembly and the rotating assembly. The parts of the electric hammer clutch structure are simple to produce and process and easy to realize.

Description

Clutch structure for switching functions of electric hammer and electric hammer

Technical Field

The utility model belongs to the technical field of the electric work instrument, a separation and reunion structure and electric hammer for electric hammer function switches 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 a user to switch a required working mode as required, a relatively complicated switching mechanism is often provided in these electric tools, which not only has poor stability, but also makes processing of parts troublesome, and thus has high application cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the existing electric hammer has when realizing function switching, and providing a clutch structure and an electric hammer which are easy to realize function switching.

The purpose of the utility model can be realized by the following technical proposal:

a clutch structure for switching functions of an electric hammer is characterized by comprising a knob, a first transmission mechanism, a second transmission mechanism, a clutch member I, a clutch member II and a retaining structure, wherein the clutch member I and the clutch member II are arranged on a central shaft of the electric hammer and can rotate around the axis center of the central shaft along with the central shaft, the knob can drive the clutch member I to move along the central shaft through the first transmission mechanism so as to enable the clutch member I to be separated from an impact assembly of the electric hammer, the knob can drive the clutch member II to move along the central shaft through the second transmission mechanism so as to enable the clutch member II to be separated from a rotating assembly of the electric hammer, the retaining structure respectively drives the clutch member I and the clutch member II to move along the central shaft through the first transmission mechanism and the second transmission mechanism and can be respectively combined with the impact assembly and the rotating assembly, and the central shaft is driven to rotate by a power driving mechanism of the electric hammer.

In the clutch structure for switching the functions of the electric hammer, the first transmission structure comprises a first drive plate, the first drive plate is provided with a first connecting plate extending towards the central shaft, the first drive plate is provided with a first drive hole, the first connecting plate is connected with the first clutch part through a first connecting structure so that the first connecting plate and the first clutch part can synchronously move back and forth in the axial direction of the central shaft and can freely rotate relatively, the second transmission structure comprises a second drive plate, the second drive plate is provided with a second connecting plate extending towards the central shaft, the second drive plate is provided with a second drive hole, the second connecting plate is connected with the second clutch part through a second connecting structure so that the second connecting plate and the second clutch part can synchronously move back and forth in the axial direction of the central shaft and can freely rotate relatively, the first drive plate and the second drive plate are driven to reversely move by a retaining structure, and the first drive plate and the second drive plate are stacked, the knob is provided with a driving pin, the driving pin sequentially penetrates through the first driving hole and the second driving hole, the driving pin is eccentrically arranged relative to the center of the knob, and one of the two driving plates can be driven to lean against the other driving plate in the axial direction of the central shaft through the driving pin when the knob rotates forwards and reversely.

In the clutch structure for switching the functions of the electric hammer, the first driving hole is provided with a first avoidance space and a first driving side wall, the second driving hole is provided with a second avoidance space and a second driving side wall, and the driving pin can act on the first driving side wall or the second driving side wall to respectively drive the first driving plate and the second driving plate to move and simultaneously move in the corresponding avoidance space of the other driving plate. When the driving pin acts on the first driving side wall to drive the first driving plate to move, the part of the driving pin penetrating into the second driving hole moves in the second avoiding space to avoid driving the second driving plate. On the contrary, when the driving pin acts on the second driving side wall to drive the second driving plate to move, the part of the driving pin penetrating into the second driving hole moves in the first avoiding space to avoid driving the first driving plate. Therefore, the knob can only drive one driving plate to move in forward rotation and reverse rotation.

In the above clutch structure for switching the functions of the electric hammer, the first driving side wall and the second driving side wall are both vertically arranged and are respectively located on two sides of the driving pin.

In the clutch structure for switching the functions of the electric hammer, the first avoidance space is provided with a first avoidance side wall in butt joint with the first driving side wall, the first avoidance side wall is arc-shaped and concentric with the center of the knob corresponding to the circle center, the second avoidance space is provided with a second avoidance side wall in butt joint with the second driving side wall, and the second avoidance side wall is arc-shaped and concentric with the center of the knob corresponding to the circle center. When the driving pin moves in the corresponding avoiding space, the driving pin moves along the corresponding avoiding side wall.

In the clutch structure for switching the functions of the electric hammer, the retaining structure comprises a retaining spring and a guide rod, the guide rod is arranged on the body of the electric hammer and penetrates through the first connecting plate and the second connecting plate, the first connecting plate and the second connecting plate can freely move along the guide rod, the retaining spring is sleeved on the guide rod, and two ends of the retaining spring respectively act on the first driving plate and the second driving plate. The holding spring is in a compressed state, and two ends of the holding spring respectively act on the first driving plate and the second driving plate, so that the two driving plates are kept in a motion trend of reverse motion.

In the clutch structure for switching the functions of the electric hammer, the first driving plate is further provided with a first guide plate, the first guide plate is positioned between the first connecting plate and the second connecting plate and is also penetrated by a guide rod, and two ends of the retaining spring respectively act on the first guide plate and the second connecting plate.

In the clutch structure for switching the functions of the electric hammer, the second driving plate is further provided with a second guide plate, the second guide plate is located on the other side, opposite to the first connecting plate, of the second connecting plate, and the second guide plate is provided with a brake latch matched with an output gear in the rotating assembly. When the clutch member II is separated from the rotating assembly, the guide plate II moves along with the second driving plate, so that the brake latch is inserted into the rotating assembly, and the output gear can be immediately braked once the brake latch is meshed with the output gear in the rotating assembly because the guide plate II cannot rotate.

In foretell a separation and reunion structure for electric hammer function switches, separation and reunion structure still including spacing arresting gear, this spacing arresting gear includes limiting plate and brake spring, the both ends of limiting plate are fixed braking vane and the baffle of being equipped with respectively, the deflector II still has on the second drive plate, the deflector is two in the connecting plate two opposite side relative to connecting plate one, the baffle is located between connecting plate two and the deflector II and is passed by the guide arm equally, brake spring cover is established on the guide arm and is located between baffle and the deflector II and leans on the baffle top on connecting plate two, the braking vane is located the outside of deflector II and has on it with the output gear assorted braking latch among the rotating assembly. When the clutch member II is combined with the rotating assembly, the positions of the second driving plate, the second connecting plate and the clutch member II are limited by limiting the position of the brake plate, and the second connecting plate is prevented from interfering with an output gear in the rotating assembly. When the clutch part II is separated from the rotating assembly, under the action of the guide plate II and the brake spring, the baffle plate, the limiting plate and the brake plate integrally move along with the second drive plate, so that the brake latch is inserted into the rotating assembly, and once the brake latch is meshed with the output gear in the rotating assembly, the output gear can be immediately braked.

In foretell a separation and reunion structure for electric hammer function switches, first connecting structure including set up the first bayonet socket in connecting plate outer end and set up the first draw-in groove of ring shape on clutch spare lateral wall, the outer end card of connecting plate one is gone into in above-mentioned first draw-in groove, first bayonet socket is arc and laminates mutually with the tank bottom of first draw-in groove.

In the clutch structure for switching the functions of the electric hammer, the second connecting structure comprises a second bayonet arranged at the outer end of the second connecting plate and a circular second clamping groove arranged on the outer side wall of the clutch piece, the outer end of the second connecting plate is clamped into the second clamping groove, and the second bayonet is arc-shaped and is attached to the bottom of the second clamping groove.

In foretell a separation and reunion structure for electric hammer function switching, the knob on be equipped with a carousel, the carousel periphery is spaced apart to be equipped with three notch, be equipped with a shell fragment on the organism of electric hammer, the both ends of shell fragment are fixed on the organism, the middle part is equipped with the arch towards carousel one side, when the carousel rotated along with the knob, in three notch was gone into to the card in proper order to above-mentioned arch ability, deformation so that the arch advances, goes out the notch can take place in the middle part of shell fragment.

The electric hammer comprises a rotating assembly for outputting rotating force, an impact assembly for outputting impact force, a power driving mechanism for providing power and a central shaft, wherein the central shaft is used for transmitting the power of the power driving mechanism to the rotating assembly and the impact assembly.

Compared with the prior art, the electric hammer and the clutch structure for switching the functions can freely switch the drilling and impacting functions, and the switching operation is simple and convenient. Each spare part production and processing of separation and reunion structure is all comparatively simple, easily realizes.

Drawings

Fig. 1 is a schematic perspective view of an internal power unit of an electric hammer.

Fig. 2 is a sectional view of fig. 1.

Fig. 3 is a perspective view of the clutch structure.

Fig. 4 is a schematic view of the cooperation of the first transmission structure and the second transmission structure.

Fig. 5 is a schematic view of the knob.

In the figure, 1, a machine body; 2. a central shaft; 3. a motor; 4. a motor shaft; 5. a transmission gear; 6. a bearing; 7. an output gear; 8. rotating the head; 9. a swing bearing; 10. a swing lever; 11. an impact head; 12. a knob; 13. a clutch member I; 14. a clutch part II; 15. convex edges; 16. a pinion gear; 17. a first drive plate; 18. a first connecting plate; 19. a first drive aperture; 20. a first bayonet; 21. a first card slot; 22. a second drive plate; 23. a second connecting plate; 24. a second drive aperture; 25. a second bayonet; 26. a second card slot; 27. a drive pin; 28. a first drive sidewall; 29. a second drive sidewall; 30. a first avoidance sidewall; 31. a second avoidance sidewall; 32. a retention spring; 33. a guide bar; 34. a first guide plate; 35. a second guide plate; 36. a brake spring; 37. a limiting plate; 38. a brake plate; 39. a baffle plate; 40. a turntable; 41. a recess; 42. a spring plate; 43. a protrusion; 44. and (5) braking the latch.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the present electric hammer includes a body 1, a rotation assembly for outputting a rotational force, an impact assembly for outputting an impact force, a power driving mechanism for supplying power, and a central shaft 2 for transmitting the power of the power driving mechanism to the rotation assembly and the impact assembly. The power driving mechanism is a motor 3, a motor shaft 4 of the motor 3 is meshed with a transmission gear 5, the transmission gear 5 is sleeved on the central shaft 2 and is fixedly connected with the central shaft 2, two ends of the central shaft 2 are rotatably arranged in the machine body 1 through bearings 6, and the motor 3 drives the central shaft 2 to rotate through the motor shaft 4 and the transmission gear 5. The rotating assembly comprises an output gear 7 and a rotating head 8, the output gear 7 is fixedly sleeved on the outer side of the rotating head 8, and the output gear 7 is connected with the central shaft 2 through a clutch structure. The impact assembly comprises a swing bearing 9, a swing rod 10 and an impact head 11, the swing bearing 9 is sleeved on the central shaft 2 and freely rotates relative to the central shaft 2, the swing bearing 9 drives the impact head 11 to linearly reciprocate through the swing rod 10 when rotating, the swing bearing 9 is connected with the central shaft 2 through a clutch structure, and the central shaft 2 is driven to rotate by a power driving mechanism of the electric hammer.

As shown in fig. 3 and 4, the clutch structure includes a knob 12, a first transmission mechanism, a second transmission mechanism, a first clutch member 13, a second clutch member 14 and a retaining structure, the first clutch member 13 and the second clutch member 14 are sleeved on the central shaft 2 of the electric hammer and can move back and forth along the central shaft 2, the central shaft 2 is provided with a part of the first clutch member 13 and the second clutch member 14, which has a non-circular cross section, and the first clutch member 13 and the second clutch member 14 can be driven to rotate around the axis of the central shaft 2 along with the central shaft 2. The retaining structure is positioned between the clutch piece I13 and the clutch piece II 14, drives the clutch piece I13 and the clutch piece II 14 to move reversely through the first transmission mechanism and the second transmission mechanism respectively, and keeps the clutch piece I13 and the clutch piece II 14 in a state of being combined with the impact assembly and the rotating assembly respectively when the clutch piece I13 and the clutch piece II 14 are farthest away from each other under the movement trend of mutually separating.

The knob 12 drives the clutch member one 13 to move towards the clutch member two 14 along the central shaft 2 through the first transmission structure, so that the clutch member one 13 can be separated from the impact assembly of the electric hammer. Similarly, the knob 12 can drive the clutch member two 14 to move along the central shaft 2 toward the clutch member one 13 through the second transmission structure, so that the clutch member two 14 can be separated from the rotating component of the electric hammer.

The outer end of the clutch piece I13 is provided with a plurality of protruding ridges 15, when the clutch piece I13 moves outwards under the driving of the holding structure, the outer end is inserted into the oscillating bearing 9, the protruding ridges 15 drive the oscillating bearing 9 to rotate synchronously, and at the moment, the clutch piece I13 is combined with the impact assembly. When the clutch member 13 is driven to move inward by the first transmission mechanism, the outer end of the clutch member 13 is withdrawn from the rocking bearing 9, and the clutch member 13 is disengaged from the impact assembly. The outer end of the clutch piece II 14 is provided with a pinion 16, when the clutch piece II 14 moves outwards under the driving of the holding structure, the pinion 16 at the outer end is meshed with the output gear 7 in the rotating assembly, and the clutch piece II 14 is combined with the rotating assembly to realize gear transmission. When the second clutch 14 is driven inward by the second transmission mechanism, the pinion 16 is disengaged from the output gear 7, and the second clutch 14 is disengaged from the rotating assembly.

The first transmission structure comprises a first driving plate 17, a first connecting plate 18 extending towards the central shaft 2 is arranged on the first driving plate 17, a first driving hole 19 is formed in the first driving plate 17, and the first connecting plate 18 is connected with the clutch piece 13 through the first connecting structure, so that the first connecting plate 18 and the clutch piece 13 can synchronously move back and forth in the axial direction of the central shaft 2 and can freely rotate relatively. The first connecting structure comprises a first bayonet 20 arranged at the outer end of the first connecting plate 18 and a circular first clamping groove 21 arranged on the outer side wall of the clutch piece 13, the outer end of the first connecting plate 18 is clamped into the first clamping groove 21, the first bayonet 20 is in a circular arc shape and is attached to the bottom of the first clamping groove 21, and the first driving plate 17 can drive the clutch piece 13 to reciprocate and be combined with or separated from the impact assembly when moving along the central shaft 2.

The second transmission structure comprises a second driving plate 22, a second connecting plate 23 extending towards the central shaft 2 is arranged on the second driving plate 22, a second driving hole 24 is formed in the second driving plate 22, and the second connecting plate 23 is connected with the second clutch member 14 through a second connecting structure, so that the second connecting plate 23 and the second clutch member 14 can synchronously move back and forth in the axial direction of the central shaft 2 and can freely rotate relatively. The second connecting structure comprises a second bayonet 25 arranged at the outer end of the second connecting plate 23 and a circular second clamping groove 26 arranged on the outer side wall of the second clutch part 14, the outer end of the second connecting plate 23 is clamped into the second clamping groove 26, the second bayonet 25 is in a circular arc shape and is attached to the bottom of the second clamping groove 26, and the second driving plate 22 can drive the second clutch part 14 to reciprocate and be combined with or separated from the rotating assembly when moving along the central shaft 2.

The first driving plate 17 and the second driving plate 22 are stacked, the knob 12 is provided with a driving pin 27, the driving pin 27 sequentially passes through the first driving hole 19 and the second driving hole 24, and the driving pin 27 is eccentrically arranged relative to the center of the knob 12. The first driving hole 19 has a first avoidance space and a first driving side wall 28, the second driving hole 24 has a second avoidance space and a second driving side wall 29, the first avoidance space has a first avoidance side wall 30 butted with the first driving side wall 28, the first avoidance side wall 30 is in a circular arc shape, a corresponding circle center is concentric with the center of the knob 12, the second avoidance space has a second avoidance side wall 31 butted with the second driving side wall 29, the second avoidance side wall 31 is in a circular arc shape, and a corresponding circle center is concentric with the center of the knob 12. The first driving side wall 28 and the second driving side wall 29 are both vertically disposed and are located on both sides of the driving pin 27, respectively.

The holding structure comprises a holding spring 32 and a guide rod 33, a first guide plate 34 and a second guide plate 35 are respectively arranged on the first driving plate 17 and the second driving plate 22, the first guide plate 34 is parallel to the first connecting plate 18 and is perpendicular to the first driving plate 17, and the second guide plate 35 is parallel to the second connecting plate 23 and is perpendicular to the second driving plate 22. The guide rod 33 is arranged on the machine body 1 of the electric hammer and sequentially penetrates through the second guide plate 35, the second connecting plate 23, the first guide plate 34 and the first connecting plate 18, and all the components can move back and forth along the guide rod 33. The retaining spring 32 is sleeved on the guide rod 33 and is in a compressed state, and two ends of the retaining spring respectively act on the first guide plate 34 and the second connecting plate 23, so that the two driving plates continuously have a movement trend of reverse movement. The first driving side wall 28 and the second driving side wall 29 are closely attached to both sides of the driving pin 27 by the retaining spring 32.

The clutch structure further comprises a limiting brake device, the limiting brake device comprises a limiting plate 37 and a brake spring 36, two ends of the limiting plate 37 are respectively and fixedly provided with a brake plate 38 and a baffle plate 39, the baffle plate 39 is located between the second connecting plate 23 and the second guide plate 35 and is also penetrated by the guide rod 33, the brake spring 36 is sleeved on the guide rod 33 and is located between the baffle plate 39 and the second guide plate 35 and pushes the baffle plate 39 against the second connecting plate 23, and the brake plate 38 is located on the outer side of the second guide plate 35 and is provided with a brake latch 44 matched with the output gear 7 in the rotating assembly.

As shown in fig. 5, a rotary plate 40 is disposed on the rotary knob 12, three notches 41 are spaced apart from each other on the periphery of the rotary plate 40, a resilient plate 42 is disposed on the body 1 of the electric hammer, two ends of the resilient plate 42 are fixed on the body 1, a protrusion 43 is disposed on a side of the middle portion facing the rotary plate 40, when the rotary plate 40 rotates along with the rotary knob 12, the protrusions 43 can be sequentially inserted into the three notches 41, and the middle portion of the resilient plate 42 can be deformed to allow the protrusions 43 to enter and exit the notches 41.

In the state shown in fig. 2, the driving pin 27 is located at the position shown in fig. 5, the first driving plate 17 and the second driving plate 22 move to the farthest position under the action of the retaining spring 32, at this time, the clutch member one 13 is inserted and combined with the swing bearing 9 in the impact assembly, the motor 3 drives the central shaft 2 to rotate through the transmission gear 5, and the clutch member one 13 and the swing bearing 9 rotate along with the central shaft, so as to drive the impact head 11 to reciprocate to achieve the striking function of the electric hammer. Meanwhile, the pinion 16 on the second clutch part 14 is meshed with the output gear 7 in the rotating assembly, and the rotating head 8 is driven by the output gear 7 to rotate, so that the drilling function is realized. Even if the first clutch member 13 and the second clutch member 14 do not have the engagement portion which can be accurately inserted into the swing bearing 9 and the output gear 7, since the elastic force of the holding spring 32 is always applied to the first clutch member 13 and the second clutch member 14, the engagement is reinserted when the first clutch member 13 and the second clutch member 14 are rotated, and at this time, the hammer has both the impact function and the drilling function. The outer end of the brake plate 38 is blocked by the machine body 1, the positions of the second connecting plate 23 and the second clutch member 14 are limited by the baffle plate 39, and the second clutch member 14 is prevented from being pushed too far to interfere with the matching relationship between the pinion 16 and the output gear 7.

When the electric hammer is required to realize only a single function, the knob 12 is rotated, for example, the knob 12 is rotated clockwise according to the view angles of fig. 3 and 4 on the basis of the original function of both impact and drilling, the rotary disk 40 is rotated to jack up the middle part of the elastic sheet 42, so that the protrusion 43 is separated from the notch 41, and the elastic sheet 42 is reset to clamp the protrusion 43 into a new notch 41 until the next notch 41 is rotated to the right position. During the rotation of the knob 12, the driving pin 27 rotates eccentrically and acts on the first driving side wall 28 to push the first driving plate 17 to move, and the first driving plate 17 drives the first clutch member 13 to abut against the second clutch member 14 until the first clutch member 13 is completely separated from the oscillating bearing 9. The second clutch member 14 is not in a fixed position, the driving pin 27 rotates only to abut against the second avoiding side wall 31, the second driving plate 22 cannot be driven to move, and the second clutch member 14 is still kept in a combined state with the rotating assembly. When the motor 3 works, the transmission gear 5 drives the central shaft 2 to rotate, the central shaft 2 drives the clutch part II 14 and the output gear 7 to rotate, the electric hammer realizes the drilling function, the clutch part I13 is in an idle running state, and the impact head 11 does not move.

On the basis of the original function of impact and drilling, the knob 12 is rotated counterclockwise according to the view angles of fig. 3 and 4, the rotary disc 40 is rotated to jack up the middle part of the elastic sheet 42, so that the protrusion 43 is separated from the notch 41, and the elastic sheet 42 is reset to clamp the protrusion 43 into a new notch 41 until the next notch 41 is rotated to a position. During the rotation of the knob 12, the driving pin 27 rotates eccentrically and acts on the second driving side wall 29 to push the second driving plate 22 to move, and the second driving plate 22 drives the second clutch member 14 to abut against the first clutch member 13 until the pinion 16 of the second clutch member 14 is completely separated from the output gear 7. The clutch piece 13 is fixed, the driving pin 27 only moves against the first avoiding side wall 30, the first driving plate 17 cannot be driven to move, and the clutch piece 13 is still combined with the swing bearing 9. When the motor 3 works, the transmission gear 5 drives the central shaft 2 to rotate, the central shaft 2 drives the clutch piece I13 and the oscillating bearing 9 to rotate, the electric hammer realizes an impact function, and the clutch piece II 14 is in an idle running state and has no rotation output.

When the second clutch member 14 is disengaged from the rotating assembly, the second guide plate 35 and the braking spring 36 allow the stop plate 39, the limit plate 37 and the braking plate 38 to integrally move along with the second drive plate 22, so that the braking latch 44 is inserted into the rotating assembly, and once the braking latch 44 is meshed with the output gear 7 in the rotating assembly, the output gear 7 can be immediately braked or limited to rotate.

Example 2

In this embodiment, the stopper 39, the stopper plate 38, and the stopper plate 37 are removed, and the stopper latch 44 is directly provided on the second guide plate 35. When the second clutch member 14 is disengaged from the rotating assembly, the second guide plate 35 moves with the second drive plate 22, so that the brake latch 44 is inserted into the rotating assembly, and since the second guide plate 35 cannot rotate, once the brake latch 44 is engaged with the output gear 7 in the rotating assembly, the output gear 7 can be immediately braked.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended manner, i.e. in a manner equivalent to "including at least … …", and not in a closed manner, i.e. in a manner not to be interpreted as "including … … only".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A clutch structure for switching functions of an electric hammer is characterized by comprising a knob, a first transmission mechanism, a second transmission mechanism, a clutch member I, a clutch member II and a retaining structure, wherein the clutch member I and the clutch member II are arranged on a central shaft of the electric hammer and can rotate around the axis center of the central shaft along with the central shaft, the knob can drive the clutch member I to move along the central shaft through the first transmission mechanism so as to enable the clutch member I to be separated from an impact assembly of the electric hammer, the knob can drive the clutch member II to move along the central shaft through the second transmission mechanism so as to enable the clutch member II to be separated from a rotating assembly of the electric hammer, the retaining structure respectively drives the clutch member I and the clutch member II to move along the central shaft through the first transmission mechanism and the second transmission mechanism and can be respectively combined with the impact assembly and the rotating assembly, and the central shaft is driven to rotate by a power driving mechanism of the electric hammer.

2. The clutch structure for electric hammer function switching according to claim 1, wherein the first transmission structure includes a first driving plate having a first connecting plate extending toward the central axis, the first driving plate having a first driving hole formed therein, the first connecting plate being connected to the first clutch member via a first connecting structure so that the first connecting plate and the first clutch member can synchronously move back and forth in the axial direction of the central axis and can freely rotate relative thereto, the second transmission structure includes a second driving plate having a second connecting plate extending toward the central axis, the second driving plate having a second driving hole formed therein, the second connecting plate being connected to the second clutch member via a second connecting structure so that the second connecting plate and the second clutch member can synchronously move back and forth in the axial direction of the central axis and can freely rotate relative thereto, the holding structure driving the first driving plate and the second driving plate to move in opposite directions, the first drive plate and the second drive plate are stacked, the knob is provided with a drive pin, the drive pin sequentially penetrates through the first drive hole and the second drive hole, the drive pin is eccentrically arranged relative to the center of the knob, and one of the two drive plates can be respectively driven to lean against the other drive plate in the axial direction of the central shaft through the drive pin when the knob rotates forwards and reversely.

3. A clutch structure for switching functions of an electric hammer as claimed in claim 2, wherein the holding structure comprises a holding spring and a guide rod, the guide rod is disposed on the body of the electric hammer and passes through the first connecting plate and the second connecting plate, the first connecting plate and the second connecting plate can move freely along the guide rod, the holding spring is sleeved on the guide rod, and two ends of the holding spring respectively act on the first driving plate and the second driving plate.

4. A clutch structure for electric hammer function switching according to claim 3, wherein said first driving plate further has a first guide plate interposed between the first coupling plate and the second coupling plate and also penetrated by the guide rod, and both ends of said holding spring respectively act on the first guide plate and the second coupling plate.

5. A clutch structure for switching functions of an electric hammer as claimed in claim 4, wherein the second driving plate further comprises a second guide plate, the second guide plate is located on the other side of the second connecting plate opposite to the first connecting plate, and the second guide plate is provided with a second brake latch matched with the output gear in the rotating assembly.

6. The clutch structure for switching the functions of the electric hammer according to claim 4, wherein the clutch structure further comprises a limiting brake device, the limiting brake device comprises a limiting plate and a brake spring, a brake plate and a baffle plate are respectively and fixedly arranged at two ends of the limiting plate, a second guide plate is further arranged on the second driving plate, the second guide plate is located on the other side, opposite to the first connecting plate, of the second connecting plate, the baffle plate is located between the second connecting plate and the second guide plate and is also penetrated by the guide rod, the brake spring is sleeved on the guide rod and is located between the baffle plate and the second guide plate and abuts against the baffle plate on the second connecting plate, and the brake plate is located on the outer side of the second guide plate and is provided with a brake latch matched with the output gear in the rotating assembly.

7. The clutch structure for switching the functions of the electric hammer according to claim 2, wherein the first connecting structure includes a first bayonet opening formed at an outer end of the first connecting plate and a circular first slot opening formed on an outer side wall of the clutch member, the outer end of the first connecting plate is clamped into the first slot, and the first bayonet opening is circular and attached to a slot bottom of the first slot.

8. The clutch structure for switching the functions of the electric hammer according to claim 2, wherein the second connecting structure comprises a second bayonet arranged at the outer end of the second connecting plate and a circular second clamping groove arranged on the outer side wall of the clutch member, the outer end of the second connecting plate is clamped in the second clamping groove, and the second bayonet is arc-shaped and is attached to the bottom of the second clamping groove.

9. The clutch structure for switching the functions of the electric hammer according to any one of claims 1 to 8, wherein the knob is provided with a rotary plate, three notches are formed in the periphery of the rotary plate at intervals, the body of the electric hammer is provided with a spring plate, two ends of the spring plate are fixed to the body, a protrusion is formed in the middle of the spring plate, the protrusion faces one side of the rotary plate, the protrusion can be sequentially clamped into the three notches when the rotary plate rotates along with the rotary plate, and the middle of the spring plate can deform to enable the protrusion to enter and exit the notches.

10. An electric hammer comprising a rotary assembly for outputting a rotational force, an impact assembly for outputting an impact force, a power driving mechanism for supplying power, and a central shaft for transmitting the power of the power driving mechanism to the rotary assembly and the impact assembly, wherein the electric hammer further comprises a clutch structure as claimed in any one of claims 1 to 9.