CN221088911U - Electric tool hammering set and electric tool comprising same - Google Patents

Abstract

The utility model relates to a hammering set of an electric tool, comprising: a rotary seat, an output shaft piece, a pushing part, a pushing piece, a hammering piece and an elastic piece. The rotating seat comprises a plurality of side walls which are distributed at intervals around the axial direction, and a guide groove is defined between any two adjacent side walls of the plurality of side walls; the output shaft piece comprises a shaft part and a plurality of impact blocks which are arranged on the shaft part in a protruding way at intervals in the circumferential direction; the pushing part comprises a sleeve piece sleeved on the output shaft piece and a rolling piece clamped between the sleeve piece and the rotating seat; the pushing piece is sleeved on the output shaft piece and comprises a pushed part facing the pushing part; the hammering piece is sleeved on the output shaft piece and comprises a body and a plurality of hammering blocks radially protruding from the body, and each hammering block can be axially slidably accommodated in one guide groove; the elastic piece is positioned between the rotating seat and the output shaft piece and enables the pushing piece to have a trend of moving towards the pushing part. The utility model has smooth action and good force transmission effect.

Description

Electric tool hammering set and electric tool comprising same

Technical Field

The present utility model relates to power tools, and more particularly, to a power tool hammering set and a power tool including the same.

Background

In general, an electric tool, such as an electric impact tool, uses an electric motor to drive a hammering set to rotate, and uses the hammering set to generate intermittent impact force, so as to provide better rotation effect.

The conventional hammering set mainly comprises a hammering chamber, a hammering block, a power output shaft and other components, however, the conventional intermittent hammering mechanism of the hammering set is complex in manufacturing, assembling and replacing, and the hammering positions of the hammering block and the power output shaft are poorly designed, so that the operation is not smooth and the force transmission effect is poor. In addition, the conventional hammering set has a longer structural configuration, is easy to generate larger moment when being held by an operator, is laborious and has poor operation stability, and has disadvantages to be improved.

Accordingly, there is a need for a novel and improved power tool hammering set and a power tool including the same, which solve the above-mentioned problems.

Disclosure of utility model

The utility model mainly aims to provide an electric tool hammering set and an electric tool comprising the same, which are smooth in action and good in force transmission effect.

In order to achieve the above object, the present utility model provides a power tool hammering set, comprising: a rotary seat, an output shaft piece, a pushing part, a pushing piece, a hammering piece and an elastic piece. The rotating seat is driven by a motor output shaft to rotate around an axial direction, and comprises a plurality of side walls which are distributed around the axial direction at intervals, and a guide groove is defined between any two adjacent side walls of the plurality of side walls; the output shaft piece is arranged on the rotary seat in a relatively rotatable manner and comprises a shaft part and a plurality of impact blocks which are arranged on the shaft part in a protruding manner at intervals in the circumferential direction; the pushing part is arranged on the inner side of the rotating seat and comprises a sleeve piece sleeved on the output shaft piece and a rolling piece clamped between the sleeve piece and the rotating seat, and the rolling piece can rotate around the axial direction; the pushing piece is sleeved on the output shaft piece in a synchronous rotation mode and comprises a pushed part facing the pushing part; the hammering piece is sleeved on the output shaft piece in a relatively rotatable manner and comprises a body and a plurality of hammering blocks radially protruding from the body, and each hammering block can be axially slidably accommodated in the guide groove; the elastic piece is positioned between the rotating seat and the output shaft piece and enables the pushing piece to have a trend of moving towards the pushing part. When the rotary seat rotates to drive the rolling piece to rotate around the axial direction, the rolling piece intermittently pushes the pushed part along the axial direction, and the pushing piece drives the hammering piece to intermittently move along the axial direction, so that the plurality of hammering blocks partially protrude out of the plurality of guide grooves and intermittently interfere and impact the plurality of supporting blocks in a rotating direction of the rotary seat.

Preferably, two opposite sides of each of the impact blocks are provided with two impact surfaces extending outwards in an arc convex manner, two straight-extending impact surfaces are arranged on opposite sides of each of the impact blocks, and each of the impact blocks can impact one of the impact surfaces in the rotation direction.

Preferably, the contact area between each striking surface and one side wall is not more than 2/3 of the area of the striking surface.

Preferably, each of the striking blocks has two striking surfaces and a necked-down section located radially inward of the two striking surfaces, and when the plurality of striking blocks strike the plurality of striking surfaces, a gap is maintained between each necked-down section and one of the striking blocks.

Preferably, two striking surfaces are arranged on two opposite sides of each striking block, at least one imaginary line passing through one striking surface vertically is defined, and a striking point is defined at the intersection of each imaginary line and one striking surface; when the plurality of striking blocks strike the plurality of bearing blocks, at least one arm line perpendicular to the imaginary line passes through an axle center of the output shaft and at least one striking point.

Preferably, an imaginary circle is defined around the axis of the output shaft and passing through the plurality of striking points of the plurality of striking surfaces, a first distance is defined between the outer peripheral surface of the rotary seat and the axis of the output shaft, and the radius of the imaginary circle is 0.75 to 0.95 times of the first distance.

Preferably, an imaginary circle is defined around the axis of the output shaft and passing through the plurality of striking points of the plurality of striking surfaces, a second distance is defined between the inner peripheral surface of the rotary seat and the axis of the output shaft, and the radius of the imaginary circle is 1.25 times to 1.65 times of the second distance.

Preferably, the output shaft member includes a ring recess axially open toward the rotating seat, and one end of the elastic member is accommodated in the ring recess.

Preferably, the pushing member further includes a sleeve portion axially protruding from the pushed portion, and the sleeve portion and the sleeve member are at least partially radially overlapped.

Preferably, a receiving groove is concavely formed on one side of the sleeving part facing the sleeve, and one end of the sleeve can be accommodated in the receiving groove.

Preferably, the outer circumferential surface of the sleeve includes a first arcuate concave surface along which the roller moves about the axial direction, the roller not protruding from an end of the sleeve in a radial direction transverse to the axial direction.

Preferably, the sleeve further comprises a first end and a second end which are positioned at two opposite sides of the first arc concave surface, the first end can be abutted against the pushing piece, the second end can be embedded in the rotating seat, and the thickness of the first end is smaller than that of the second end.

Preferably, the side of the pushing member facing the pushing portion further includes a second arc concave surface, and one end of the pushed portion is provided with two inclined guiding surfaces located at two opposite sides of the second arc concave surface.

Preferably, the rotating seat further comprises a bottom wall, the plurality of side walls are parallel to the axial direction and extend convexly to the bottom wall, the bottom wall is concavely provided with an arc groove which extends around the axial direction and accommodates at least part of the pushing part, and an extension radian of the arc groove is not more than pi.

Preferably, an axial depth of the arc groove is not more than 1.2 times a diameter of the roller.

Preferably, two opposite sides of each impact block are provided with two impact surfaces extending outwards in an arc convex manner, two straight impact surfaces extending in a straight manner are arranged on opposite sides of each impact block, and each impact block can impact one impact surface in the rotation direction; the contact area of each striking surface and one side wall is not more than 2/3 of the area of the striking surface; each impact block is provided with a necking section positioned on the radial inner side of the two impact surfaces, and when the plurality of impact blocks impact the plurality of impact surfaces, a gap is kept between each necking section and one impact block; defining a virtual circle which takes the axis of the output shaft as the center of a circle and passes through the plurality of striking points of the plurality of striking surfaces, wherein a first distance is defined between the peripheral surface of the rotary seat and the axis of the output shaft, and the radius of the virtual circle is 0.75 to 0.95 times of the first distance; the output shaft piece comprises a ring concave which is axially opened towards the rotating seat, and one end of the elastic piece is accommodated in the ring concave; the pushing piece further comprises a sleeving part axially provided with the pushed part in a protruding mode, and the sleeving part and the sleeve part are at least partially overlapped in the radial direction; one side of the sleeve joint part facing the sleeve member is concavely provided with a containing groove, and one end part of the sleeve member can be contained in the containing groove; the outer peripheral surface of the sleeve comprises a first arc concave surface, the rolling piece moves along the first arc concave surface around the axial direction, and the rolling piece does not protrude out of one end of the sleeve along a radial direction transverse to the axial direction; the sleeve comprises a first end part and a second end part which are positioned at two opposite sides of the first arc concave surface, wherein the first end part can be accommodated in the accommodating groove, the second end part can be embedded in the rotating seat, and the thickness of the first end part is smaller than that of the second end part; a radial dimension of the first end is smaller than a radial dimension of the second end; the pushed part extends towards the pushing part in a sharp angle shape from the sleeving part; the pushing piece comprises a first arc concave surface, and the rolling piece can move along the first arc concave surface around the axial direction; one end of the pushed part is provided with two inclined guide surfaces positioned at two opposite sides of the second arc concave surface; the rotating seat further comprises a bottom wall, the plurality of side walls are arranged on the bottom wall in a protruding mode in parallel to the axial direction, the bottom wall is concavely provided with an arc groove which extends around the axial direction and accommodates at least part of the pushing part, and the extending radian of the arc groove is not more than pi; and an axial depth of the arc groove is not more than 1.2 times of a diameter of the rolling piece.

In order to achieve the above object, the present utility model further provides a power tool including a power tool hammering set as described above, further comprising: a motor including the motor output shaft; and a speed reducing mechanism connected between the motor output shaft and the electric tool hammering set.

Preferably, the rotating seat further comprises a first key tooth part, and a transmission shaft of the speed reducing mechanism is provided with a second key tooth part which can be meshed with the first key tooth part.

Drawings

Fig. 1 is a perspective view of a preferred embodiment of the present utility model.

FIG. 2 is an exploded view of a preferred embodiment of the present utility model.

FIG. 3 is an exploded view of another view of a preferred embodiment of the present utility model.

Fig. 4 is a top view of a rotating base according to a preferred embodiment of the utility model.

Fig. 5 to 6 are schematic views illustrating an operation section of a preferred embodiment of the present utility model.

FIG. 7 is a top view of a preferred embodiment of the present utility model.

FIG. 8 is a side view of a preferred embodiment of the present utility model.

Detailed Description

The following examples are given to illustrate possible embodiments of the present utility model, but are not intended to limit the scope of the utility model, and the terms "a" and "an" as used herein are not intended to limit the number of "a" or "an" as desired, but rather the number of "a" or "an" as used herein is intended to cover all such modifications as may be desired.

Referring to fig. 1 to 8, a preferred embodiment of the present utility model is shown, wherein the power tool hammering set 1 of the present utility model includes a rotary base 10, an output shaft 20, a pushing portion 30, a pushing member 40, a hammering member 50 and an elastic member 60.

The rotary seat 10 is connected to a motor output shaft 210 to rotate around an axial direction a, the rotary seat 10 includes a plurality of side walls 11 spaced around the axial direction a, and a guiding slot 12 is defined between any two adjacent side walls 11; the output shaft 20 is rotatably disposed on the rotary seat 10 and includes a shaft 21 and a plurality of impact blocks 22 protruding from the shaft 21 at intervals; the pushing portion 30 is disposed on an inner side of the rotating base 10 and includes a sleeve member 31 disposed on the output shaft 20 and a rolling member 32 disposed between the sleeve member 31 and the rotating base 10, wherein the rolling member 32 can rotate around the axial direction a; the pushing member 40 is synchronously rotatably sleeved on the output shaft 20 and includes a pushed portion 41 facing the pushing portion 30; the hammering piece 50 is sleeved on the output shaft 20 in a relatively rotatable manner, the hammering piece 50 comprises a body 51 and a plurality of hammering blocks 52 radially protruding from the body 51, and each hammering block 52 is accommodated in one guide groove 12 in an axially slidable manner; the elastic member 60 is located between the rotary seat 10 and the output shaft 20, and causes the pushing member 40 to move toward the pushing portion 30. When the rotating base 10 rotates to drive the roller 32 to rotate around the axial direction a, the roller 32 intermittently pushes the pushed portion 41 along the axial direction a, as shown in fig. 6, the pushing member 40 drives the hammering member 50 to intermittently move along the axial direction a, so that the plurality of striking blocks 52 partially protrude from the plurality of guiding grooves 12 and intermittently interfere and strike the plurality of striking blocks 22 in a rotating direction of the rotating base 10. Therefore, the electric tool hammering set 1 has simple structure, is easy to process and assemble, and the rolling piece 32 can smoothly rotate around the axial direction A to axially push the pushing piece 40, so that the force transmission effect is good.

In this embodiment, the output shaft 20 includes a ring recess 23 axially opened toward the rotary seat 10, one end of the elastic member 60 is accommodated in the ring recess 23, and the other end of the elastic member 60 abuts against an inner flange 53 of the hammering member 50 and is located between an inner peripheral surface of the hammering member 50 and an outer peripheral surface of the output shaft 20, so that the electric tool hammering set 1 is easy to assemble and has good actuation stability, and is compact in configuration, so that the overall length of the electric tool hammering set 1 is short, thereby facilitating labor-saving operation.

The pushing member 40 further includes a sleeve portion 42 axially protruding from the pushed portion 41, and the sleeve portion 42 is at least partially radially overlapped with the sleeve member 31, which is beneficial to miniaturization. Preferably, a receiving groove 421 is concavely disposed on a side of the sleeve member 42 facing the sleeve member 31, and an end portion of the sleeve member 31 can be received in the receiving groove 421, so that the sleeve member is stable and smooth during operation. The outer peripheral surface of the sleeve 31 includes a first arc concave surface 311, the roller 32 is movable along the first arc concave surface 311 around the axial direction a, and the roller 32 does not protrude from an end of the sleeve 31 in a radial direction transverse to the axial direction a, so as to guide the movement of the roller 32 and prevent the roller 32 from being separated during hammering and resetting. In this embodiment, the sleeve 31 includes a first end 312 and a second end 313 at two opposite sides of the first arc concave 311, the first end 312 can be abutted against the pushing member 40 and accommodated in the accommodating groove 421, the second end 313 can be embedded in the rotating seat 10, and a thickness of the first end 312 is smaller than a thickness of the second end 313, so that the structure strength is good; the first end 312 has a smaller radial dimension than the second end 313, which facilitates assembly, and the second end 313 has a good supporting strength to withstand the impact force of the hammering member 50 during axial resetting.

Specifically, the side of the pushing member 40 facing the pushing portion 30 further includes a second arc concave surface 43, and the rolling member 32 can move along the second arc concave surface 43 around the axial direction a, so that the rolling member 32 can be clamped between the first arc concave surface 311, the second arc concave surface 43 and the rotating base 10, as shown in fig. 5, the guiding effect is good and smooth rotation is facilitated. The pushed portion 41 extends from the sleeve portion 42 toward the pushing portion 30 in a sharp corner shape; two inclined guiding surfaces 411 are disposed at one end of the pushed portion 41 and located at two opposite sides of the second arc concave surface 43, so as to reduce the contact area between the rolling member 32 and the pushed portion 41, smoothly rotate without jamming, and rapidly reset the hammering member 50 to precisely control the hammering time.

Referring to fig. 4 in combination, the rotary base 10 further includes a bottom wall 13, the plurality of side walls 11 extend parallel to the axial direction a and protrude from the bottom wall 13, the bottom wall 13 is concavely provided with an arc groove 131 extending around the axial direction a and accommodating at least part of the pushing portion 30, an extending arc of the arc groove 131 is not greater than pi, thereby the roller 32 can move in the arc groove 131 and selectively abut against one of two abutting walls 132 located on opposite sides of the arc groove 131, and further allow forward and reverse rotation of the output shaft 20. Preferably, an axial depth D of the arc groove 131 is not greater than 1.2 times a diameter of the rolling member 32, so as to effectively limit the rolling member 32, and avoid increasing an axial length of the electric tool hammering set 1, which is beneficial to miniaturization.

Referring to fig. 7, two striking surfaces 221 extending outwards are disposed on opposite sides of each of the striking blocks 22, two striking surfaces 521 extending flatly are disposed on opposite sides of each of the striking blocks 52, and each of the striking blocks 52 strikes one of the striking surfaces 221 in the rotation direction; each of the impact blocks 22 has a necked-down section 222 located radially inward of the two impact surfaces 221, such that when the plurality of impact blocks 52 impact the plurality of impact surfaces 221, a gap is maintained between each necked-down section 222 and one of the impact blocks 52, and non-comprehensive contact provides better contact stability and better force transmission effect. Preferably, the contact area between each striking face 521 and one side wall 11 is not greater than 2/3 of the area of the striking face 521, and the contact friction is reduced to enable each striking block 52 to smoothly move in the guide groove 12 along the axial direction a.

In detail, at least one imaginary line F passing through the striking face 521 perpendicularly is defined, and a striking point P is defined at the intersection of each imaginary line F and one striking face 521; when the plurality of striking blocks 52 strike the plurality of bearing blocks 22, at least one moment arm line M perpendicular to the imaginary line F passes through an axis of the output shaft 20 and at least one striking point P. Therefore, the force applied by the striking blocks 52 to the striking surfaces 221 can be completely acted and transmitted along the imaginary lines F, so that the component force loss is reduced, and the output shaft 20 can rotate stably and rapidly. In this embodiment, an extension direction of each striking face 521 extends through the axis of the output shaft 20, so as to ensure that the direction of the applied force is accurate. Defining a virtual circle R passing through the plurality of striking points of the plurality of striking surfaces 521 with the axis of the output shaft 20 as a center, wherein a first distance D1 is defined between the outer peripheral surface of the rotary base 10 and the axis of the output shaft 20, and a radius of the virtual circle R is 0.75 to 0.95 times the first distance D1; a second distance D2 is defined between the inner peripheral surface of the rotary seat 10 and the axis of the output shaft 20, and the radius of the imaginary circle R is 1.25 times to 1.65 times the second distance D2.

The present utility model further provides an electric tool, including the electric tool hammering set 1 as described above, further including: a motor 2 and a reduction mechanism 3. The motor 2 includes the motor output shaft 210; the reduction mechanism 3 is connected between the motor output shaft 210 and the electric tool hammering set 1, thereby providing a proper driving speed. The rotary seat 10 further comprises a first key tooth portion 14, a transmission shaft of the speed reducing mechanism 3 is provided with a second key tooth portion 310 capable of being meshed with the first key tooth portion 14, so that the rotary seat can be firmly assembled and has good force transmission effect.

The foregoing is a description of the preferred embodiments of the present utility model and the technical principles applied thereto, and it will be apparent to those skilled in the art that any equivalent transformation, simple substitution, etc. based on the technical scheme of the present utility model can be made without departing from the spirit and scope of the present utility model.

Claims (18)

1. A power tool hammering set, comprising:

The rotating seat is connected with an output shaft of a motor and driven to rotate around an axial direction, and comprises a plurality of side walls which are distributed around the axial direction at intervals, and a guide groove is defined between any two adjacent side walls of the plurality of side walls;

The output shaft piece is arranged on the rotating seat in a relatively rotatable manner and comprises a shaft part and a plurality of impact blocks which are arranged on the shaft part in a protruding manner at intervals in the circumferential direction;

The pushing part is arranged on the inner side of the rotating seat and comprises a sleeve piece sleeved on the output shaft piece and a rolling piece clamped between the sleeve piece and the rotating seat, and the rolling piece can rotate around the axial direction;

the pushing piece is sleeved on the output shaft piece in a synchronous rotation mode and comprises a pushed part facing the pushing part;

the hammering piece is sleeved on the output shaft piece in a relatively rotatable manner and comprises a body and a plurality of hammering blocks radially protruding from the body, and each hammering block can be axially slidably accommodated in the guide groove; and

An elastic piece, which is positioned between the rotating seat and the output shaft piece and enables the pushing piece to have a trend of moving towards the pushing part;

When the rotary seat rotates to drive the rolling piece to rotate around the axial direction, the rolling piece intermittently pushes the pushed part along the axial direction, and the pushing piece drives the hammering piece to intermittently move along the axial direction, so that the plurality of hammering blocks partially protrude out of the plurality of guide grooves and intermittently interfere and impact the plurality of supporting blocks in a rotating direction of the rotary seat.

2. The power tool hammering set according to claim 1, wherein two opposite sides of each of said hammering blocks are provided with two hammering surfaces extending toward outer arcs, and two opposite sides of each of said hammering blocks are provided with two hammering surfaces extending straight, and each of said hammering blocks can hit one of said hammering surfaces in said rotation direction.

3. The power tool hammering set according to claim 2, wherein the contact area of each of said striking faces and one of said side walls is not more than 2/3 of the area of said striking face.

4. The power tool hammering set according to claim 1, wherein each of said striking blocks has two striking surfaces and a necked-down section located radially inward of said two striking surfaces, and when said plurality of striking blocks strike said plurality of striking surfaces, a gap is maintained between each of said necked-down sections and one of said striking blocks.

5. The power tool hammering set according to claim 1, wherein two hammering faces are provided on opposite sides of each hammering block, defining at least one imaginary line passing vertically through one hammering face, each imaginary line defining a hammering point at a crossing point of one hammering face; when the plurality of striking blocks strike the plurality of bearing blocks, at least one arm line perpendicular to the imaginary line passes through an axle center of the output shaft and at least one striking point.

6. The power tool hammering set of claim 5, further defining an imaginary circle which takes the axis of the output shaft as a center and passes through the plural striking points of the plural striking surfaces, wherein a first distance is defined between the outer peripheral surface of the rotary base and the axis of the output shaft, and the radius of the imaginary circle is 0.75 times to 0.95 times of the first distance.

7. The power tool hammering set of claim 5, further defining an imaginary circle which takes the axis of the output shaft as a center and passes through the plural striking points of the plural striking surfaces, wherein a second distance is defined between the inner peripheral surface of the rotary base and the axis of the output shaft, and the radius of the imaginary circle is 1.25 times to 1.65 times of the second distance.

8. The power tool hammering set of claim 1, wherein said output shaft member includes a ring recess axially open toward said rotary seat, and one end of said elastic member is accommodated in said ring recess.

9. The power tool hammering set of claim 1, wherein said pushing member further comprises a socket portion axially protruding with said pushed portion, said socket portion being at least partially radially overlapped with said sleeve.

10. The power tool hammering set of claim 9, wherein a side of the sleeve part facing the sleeve part is concavely provided with a receiving groove, and an end part of the sleeve part can be received in the receiving groove.

11. The power tool hammering set according to claim 1, wherein the outer peripheral surface of said sleeve includes a first arc concave surface, said roller moves around said axial direction along said first arc concave surface, and said roller does not protrude from an end of said sleeve in a radial direction transverse to said axial direction.

12. The power tool hammering set of claim 11, wherein the sleeve further comprises a first end and a second end located at opposite sides of the first arc concave surface, the first end can be abutted against the pushing piece, the second end can be embedded in the rotating seat, and a thickness of the first end is smaller than a thickness of the second end.

13. The power tool hammering set according to claim 1, wherein a side of said pushing piece facing said pushing part further comprises a second arc concave surface, and an end part of said pushed part is provided with two inclined guiding surfaces located at two opposite sides of said second arc concave surface.

14. The power tool hammering set according to claim 1, wherein said rotary base further comprises a bottom wall, said plural side walls are protruded on said bottom wall in parallel to said axial extension, said bottom wall is concavely provided with an arc groove extending around said axial direction and accommodating at least part of said pushing part, and an extension radian of said arc groove is not more than pi.

15. The power tool hammering set of claim 14, wherein an axial depth of the arc groove is not more than 1.2 times a diameter of the rolling member.

16. The power tool hammering set according to claim 7, wherein two opposite sides of each of said hammering blocks are provided with two hammering surfaces extending outwards in an arc, two opposite sides of each of said hammering blocks are provided with two hammering surfaces extending straight, and each of said hammering blocks can hit one of said hammering surfaces in said rotation direction; the contact area of each striking surface and one side wall is not more than 2/3 of the area of the striking surface; each impact block is provided with a necking section positioned on the radial inner side of the two impact surfaces, and when the plurality of impact blocks impact the plurality of impact surfaces, a gap is kept between each necking section and one impact block; defining a virtual circle which takes the axis of the output shaft as the center of a circle and passes through the plurality of striking points of the plurality of striking surfaces, wherein a first distance is defined between the peripheral surface of the rotary seat and the axis of the output shaft, and the radius of the virtual circle is 0.75 to 0.95 times of the first distance; the output shaft piece comprises a ring concave which is axially opened towards the rotating seat, and one end of the elastic piece is accommodated in the ring concave; the pushing piece further comprises a sleeving part axially provided with the pushed part in a protruding mode, and the sleeving part and the sleeve part are at least partially overlapped in the radial direction; one side of the sleeve joint part facing the sleeve member is concavely provided with a containing groove, and one end part of the sleeve member can be contained in the containing groove; the outer peripheral surface of the sleeve comprises a first arc concave surface, the rolling piece moves along the first arc concave surface around the axial direction, and the rolling piece does not protrude out of one end of the sleeve along a radial direction transverse to the axial direction; the sleeve comprises a first end part and a second end part which are positioned at two opposite sides of the first arc concave surface, wherein the first end part can be accommodated in the accommodating groove, the second end part can be embedded in the rotating seat, and the thickness of the first end part is smaller than that of the second end part; a radial dimension of the first end is smaller than a radial dimension of the second end; the pushed part extends towards the pushing part in a sharp angle shape from the sleeving part; the pushing piece comprises a first arc concave surface, and the rolling piece can move along the first arc concave surface around the axial direction; one end of the pushed part is provided with two inclined guide surfaces positioned at two opposite sides of the second arc concave surface; the rotating seat further comprises a bottom wall, the plurality of side walls are arranged on the bottom wall in a protruding mode in parallel to the axial direction, the bottom wall is concavely provided with an arc groove which extends around the axial direction and accommodates at least part of the pushing part, and the extending radian of the arc groove is not more than pi; and an axial depth of the arc groove is not more than 1.2 times of a diameter of the rolling piece.

17. A power tool comprising a power tool hammering set according to any one of claims 1 to 16, further comprising:

A motor including the motor output shaft; and

A speed reducing mechanism connected between the motor output shaft and the electric tool hammering set.

18. The power tool of claim 17, wherein the rotary base further comprises a first key gear portion, and a transmission shaft of the speed reducing mechanism is provided with a second key gear portion capable of being engaged with the first key gear portion.