CN219504691U - Impact tool - Google Patents

Abstract

The utility model discloses an impact tool, which comprises a box body, a rotating device arranged on one side of the box body, an anvil arranged on the other side of the box body, and a driving assembly arranged in the box body, wherein the driving assembly comprises a connecting shaft and a hammer block which reciprocates along the connecting shaft to impact the anvil, the rotating device is connected with the anvil through the driving assembly to drive the anvil to rotate, and an elastic piece which is used for applying thrust to the connecting shaft to prevent the connecting shaft from moving forwards and backwards when the hammer block moves is arranged between the anvil and the connecting shaft. The utility model provides an impact tool, wherein a connecting shaft does not move back and forth during operation, and the stability is good.

Description

Impact tool

Technical Field

The utility model relates to the technical field of garden tools, in particular to an impact tool.

Background

The impact tool is widely used in garden work, and current impact tool includes motor, drive assembly, head shell and output anvil, and motor and output anvil are located the relative both sides of head shell, and drive assembly is located the head shell and is used for the torsion transmission of motor to output anvil, and in addition, drive assembly still includes the hammer block, and when drive assembly rotated, the hammer block reciprocating motion is to output anvil output impact force in the head shell.

The driving assembly of the existing impact tool further comprises a connecting shaft, the motor is connected with the anvil through the connecting shaft so as to drive the anvil to rotate, and the connecting shaft can correspondingly generate front-back movement under the reciprocating motion of the hammer block when the existing impact tool works, so that the stability of the impact tool is poor.

Disclosure of Invention

The utility model provides an impact tool, which aims to solve the defect that the stability of the connecting shaft is lower due to front-back movement of the connecting shaft in the running process of the existing impact tool, and the connecting shaft is better in stability due to no front-back movement of the connecting shaft in the running process.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an impact tool, includes the box, set up the rotating device in one side of box, set up at the anvil of the opposite side of box, set up the drive assembly in the box, drive assembly includes the connecting axle and follows the hammer block of connecting axle reciprocating motion in order to strike the anvil, rotating device passes through drive assembly and anvil connection in order to drive the anvil rotation, be provided with between anvil and the connecting axle and be used for exerting thrust in order to prevent the connecting axle to take place the elastic component of front and back drunkenness when the hammer block moves.

Through the arrangement, the connecting shaft does not move back and forth during operation, so that the connecting shaft is better in stability, the box body is particularly used for accommodating the driving assembly, the rotating device and the anvil are arranged on two opposite sides of the box body, the connecting shaft supports the hammer block, the hammer block can reciprocate along the connecting shaft, the elastic piece is arranged between the connecting shaft and the anvil and is in a compressed state, the elastic piece applies force towards the rotating device to the connecting shaft, when the connecting shaft is driven to rotate by the driving assembly, the rotating device drives the anvil to rotate at the moment, the connecting shaft drives the anvil to rotate, the hammer block reciprocates along the connecting shaft and repeatedly impacts the anvil, when the hammer block moves towards the anvil, the friction force towards the anvil is applied to the connecting shaft by the hammer block, and the thrust of the elastic piece on the connecting shaft counteracts the influence of the friction force, so that the connecting shaft is prevented from moving back and forth under the movement of the hammer block.

Further, a first bearing is provided between the end of the connecting shaft remote from the anvil and the housing to reduce drag when the drive assembly is in operation. Through the arrangement, under the action of the elastic piece, the connecting shaft is always subjected to the force towards the rotating device when in operation, so that when the hammer block reciprocates along the connecting shaft, the connecting shaft cannot move back and forth, and particularly, when the hammer block moves along the connecting shaft, the force of the elastic piece to the connecting shaft counteracts the force of the hammer block to the connecting shaft, so that the connecting shaft is prevented from moving forward, and further, the utility model is more stable in operation, the rotating resistance of the connecting shaft is smaller, and the noise is smaller.

Further, the box includes casing and end cover, forms the accommodation space that is used for holding drive assembly between casing and the end cover, and first bearing sets up between end cover and connecting axle, and rotating device sets up in the one side that the casing was kept away from to the end cover, and rotating device's output shaft passes the end cover and is connected with the connecting axle.

Further, a driving groove is formed in one end of the connecting shaft, and a driving protrusion is formed in one end of the anvil block; or, one end of the connecting shaft is provided with a driving protrusion, one end of the anvil is provided with a driving groove, and the driving protrusion is at least partially arranged in the driving groove so as to realize transmission between the connecting shaft and the anvil. Through the arrangement, in the utility model, the driving protrusion is arranged on the anvil, the driving groove is arranged on the connecting shaft, specifically, the cross section of the driving protrusion is square, the cross section of the driving groove is matched with the cross section of the driving protrusion, so that the driving protrusion and the driving groove cannot rotate relatively, the connecting shaft and the anvil synchronously rotate under the action of the rotating device, the cross section of the driving protrusion can also be in other shapes, the driving protrusion and the driving groove can be specifically adjusted according to actual conditions, if the anvil moves forwards and backwards under the action of the hammer block, the driving protrusion and the driving groove can slide relatively, the anvil cannot cause the front and back movement of the connecting shaft to influence the stability of the connecting shaft, and similarly, if the connecting shaft also cannot drive the front and back movement of the anvil to influence the working precision.

Further, the elastic piece is arranged as a butt-wave spring, and the butt-wave spring sleeve is arranged on the driving protrusion. Through the arrangement, compared with a common spring, the top wave spring has the advantages that the same elasticity only needs smaller deformation, so that the length of an elastic body is reduced, the length of the spring is further reduced, and the compactness of the spring is improved.

Further, one end fixedly connected with annular bulge of anvil block forms the holding tank of opening orientation connecting axle between annular bulge and the drive bulge, and opposite top wave spring sets up in the holding tank at least partially. Through the arrangement, the opposite-top corrugated spring is limited in the accommodating groove, and stability of the opposite-top corrugated spring is improved.

Further, the box is provided with the output hole, and the anvil passes the output hole and rotates with the box through the second bearing to be connected, and anvil and second bearing are fixed axially, and axial fixity is between second bearing and the output hole. Through the arrangement, the front-back movement of the anvil block can be restrained when the device runs, so that the working precision is improved. Specifically, when the rotary anvil is operated, the hammer block continuously impacts the anvil to output impact force to the anvil, the second bearing supports the anvil on one hand, so that the anvil cannot shake when rotating, and further stability of the anvil is improved when rotating, on the other hand, the second bearing reduces rotating resistance of the anvil, the second bearing is sleeved on the anvil, the outer side of the second bearing is axially fixed with the output hole, the inner side of the second bearing is axially fixed with the anvil, and therefore the anvil cannot axially move relative to the output hole along the axial direction of the anvil when working, namely, the anvil cannot move back and forth relative to the output hole when working.

Further, the second bearing comprises an inner ring, an outer ring and a plurality of balls arranged between the inner ring and the outer ring, a first rolling groove for rolling the balls is arranged along the periphery of the inner ring, a second rolling groove for rolling the balls is arranged along the inner periphery of the outer ring, the balls are at least partially arranged in the first rolling groove, and the balls are at least partially arranged in the second rolling groove so as to enable the inner ring and the outer ring to be axially fixed, the outer ring and the output hole to be axially fixed, and the inner ring and the anvil block are axially fixed. Through the arrangement, the second bearing is a thin-wall double-groove ball bearing, the thickness of the thin-wall double-groove ball bearing is smaller, and the length of the anvil can be reduced, so that the length of the anvil is smaller, and the compactness is better. In addition, the second bearing reduces the rotating resistance of the anvil, specifically, when the anvil rotates, the anvil drives the inner ring to rotate, the inner ring and the outer ring relatively rotate, one side of the ball is abutted against the groove bottom of the first rolling groove, the other side of the ball is abutted against the groove bottom of the second rolling groove, so that the inner ring and the outer ring are always coaxial, the anvil can not shake left and right when rotating, when the inner ring and the outer ring relatively rotate, the ball rolls between the inner ring and the outer ring, when the inner ring and the anvil are axially fixed, the inner ring can not move along the axial direction of the anvil, when the output hole and the outer ring are axially fixed, the outer ring can not move along the axial direction of the output hole, and the output hole and the anvil are coaxial, so that when the anvil works, the anvil can not move back and forth relative to the output hole.

Further, be provided with first spacing groove along the periphery of anvil, the inner circle butt has first jump ring, and the inboard embedding of first jump ring is in first spacing groove to prevent the axial motion of inner circle along the anvil, be provided with the second spacing groove along the inner periphery of output hole, the outer lane butt has the second jump ring, and the outside embedding of second jump ring is in the second spacing groove, in order to prevent the axial motion of outer lane along the output hole. Through the setting for the second bearing is more stable in the output hole, specifically, still fixedly connected with boss along the axial of anvil, one side that first jump ring was kept away from to the inner race in the boss butt, thereby makes axial fixation between inner race and the anvil, and under the effect of second jump ring, axial fixation between outer lane and the output hole, thereby makes the anvil pass through inner race, outer lane and output hole axial fixation, and then prevents the anvil drunkenness around the during operation.

Further, a third limit groove matched with the outer ring is formed along the inner periphery of the output hole, and the outer side of the outer ring is embedded into the third limit groove. Through the arrangement, axial fixation between the outer ring and the output hole is realized, when the third limiting groove is embedded in the outer ring, the wall of one side, far away from the second clamping spring, of the third limiting groove is abutted with the outer ring, and the outer ring and the output hole are axially fixed under the action of the third limiting groove and the second clamping spring.

Drawings

Fig. 1 is a schematic diagram of an embodiment.

Fig. 2 is a partial enlarged view of an embodiment.

Detailed Description

The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.

Referring to fig. 1 to 2, an impact tool includes a case 11, a rotating device 12 provided at one side of the case 11, an anvil 13 provided at the other side of the case 11, a driving assembly 14 provided in the case 11, the driving assembly 14 including a coupling shaft 141 and a hammer block 142 reciprocating along the coupling shaft 141 to impact the anvil 13, the rotating device 12 being coupled to the anvil 13 through the driving assembly 14 and the anvil 13 to drive the anvil 13 to rotate, an elastic member 15 for applying a pushing force to the coupling shaft 141 to prevent the coupling shaft 141 from moving forward and backward when the hammer block 142 moves being provided between the anvil 13 and the coupling shaft 141.

Through the arrangement, when the rotary device is in operation, the connecting shaft 141 does not move back and forth, so that the stability of the rotary device is better, the box 11 is particularly used for accommodating the driving assembly 14, the rotating device 12 and the anvil 13 are arranged on two opposite sides of the box 11, the connecting shaft supports the hammer block 142, the hammer block 142 can reciprocate along the connecting shaft, the elastic piece 15 is positioned between the connecting shaft and the anvil 13 and is in a compressed state, the elastic piece 15 applies force towards the rotating device 12 to the connecting shaft, when the rotary device 12 drives the anvil 13 to rotate through the driving assembly 14, at the moment, the rotating device 12 drives the connecting shaft 141 to rotate, the connecting shaft 141 drives the anvil 13 to rotate, the hammer block 142 reciprocates along the connecting shaft and repeatedly impacts the anvil 13, when the hammer block 142 moves towards the anvil 13, the impact of the friction force towards the anvil 13 is applied to the connecting shaft by the hammer block 142, and the influence of the friction force is counteracted by the elastic piece 15 on the connecting shaft, so that the front and back movement of the connecting shaft under the movement of the hammer block 142 is prevented.

As one implementation, a first bearing 1411 is provided between the end of the connecting shaft 141 remote from the anvil 13 and the housing 11 to reduce drag when the drive assembly is in operation. Specifically, the driving assembly further comprises a sun gear (not shown in the figure), a gear ring (not shown in the figure), a planet gear carrier (not shown in the figure) arranged between the gear ring and the sun gear, a plurality of planet gears (not shown in the figure) are arranged on the planet gear carrier, the planet gears are arranged between the sun gear and the gear ring and are connected with the connecting shaft through the planet gear carrier, and the first bearing is used for supporting the planet gear carrier so as to reduce resistance when the planet gear carrier runs.

Through the arrangement, under the action of the elastic piece 15, the connecting shaft is always subjected to the force towards the rotating device when in operation, so that when the hammer block reciprocates along the connecting shaft, the connecting shaft cannot move back and forth, and particularly, when the hammer block moves along the connecting shaft to the anvil, the force of the elastic piece on the connecting shaft counteracts the force of the hammer block on the connecting shaft, so that the connecting shaft is prevented from moving forward, the running of the utility model is more stable, the rotating resistance of the connecting shaft is smaller, and the noise is smaller.

As one implementation, the case 11 includes a housing 111 and an end cover 112, an accommodating space for accommodating the driving assembly 14 is formed between the housing 111 and the end cover 112, a first bearing 1411 is disposed between the end cover 112 and the connecting shaft 141, the rotating device 12 is disposed at a side of the end cover 112 away from the housing 111, and an output shaft of the rotating device 12 passes through the end cover 112 and is connected with the connecting shaft 141.

As one implementation, one end of the connecting shaft 141 is provided with a driving groove 1412, and one end of the anvil 13 is provided with a driving protrusion 131; or, one end of the connection shaft 141 is provided with a driving protrusion 131, one end of the anvil 13 is provided with a driving groove 1412, and the driving protrusion 131 is at least partially disposed in the driving groove 1412 to realize transmission between the connection shaft 141 and the anvil 13.

Through the above arrangement, referring to fig. 1, in the present utility model, the driving protrusion 131 is disposed on the anvil, the driving groove 1412 is disposed on the connecting shaft, specifically, the cross section of the driving protrusion 131 is square, the cross section of the driving groove 1412 is adapted to the cross section of the driving protrusion 131, so that the driving protrusion 131 and the driving groove 1412 cannot rotate relatively, under the action of the rotating device 12, the connecting shaft and the anvil synchronously rotate, the cross section of the driving protrusion 131 can be in other shapes, specifically, the driving protrusion 131 and the driving groove 1412 can be adjusted according to the actual situation, if the anvil moves back and forth under the action of the hammer block 142, the driving protrusion 131 and the driving groove 1412 slide relatively, and if the anvil moves back and forth under the action of the hammer block 142, the anvil cannot cause the front and back movement of the connecting shaft to affect the stability of the connecting shaft, and similarly, if the connecting shaft moves back and forth to affect the working accuracy.

As an implementation, the elastic member 15 is provided as a counter-top wave spring, and a counter-top wave spring housing is provided on the driving protrusion 131.

Through the arrangement, compared with a common spring, the top wave spring has the advantages that the same elasticity only needs smaller deformation, so that the length of an elastic body is reduced, the length of the spring is further reduced, and the compactness of the spring is improved.

As one implementation, an annular protrusion 132 is fixedly connected to one end of the anvil 13, and a receiving groove with an opening facing the connecting shaft 141 is formed between the annular protrusion 132 and the driving protrusion 131, and the opposite-top wave spring is at least partially disposed in the receiving groove. Through the arrangement, the opposite-top corrugated spring is limited in the accommodating groove, and stability of the opposite-top corrugated spring is improved.

As an implementation, the casing 11 is provided with an output hole 113, the anvil 13 passes through the output hole 113 and is rotatably connected to the casing 11 by a second bearing 114, the anvil 13 and the second bearing 114 are axially fixed, and the second bearing 114 and the output hole 113 are axially fixed.

With the above arrangement, the forward and backward play of the anvil 13 can be suppressed when the present utility model is operated, thereby improving the working accuracy. Specifically, in operation, the hammer block 142 continuously impacts the anvil to output impact force to the anvil, the second bearing 114 supports the anvil on one hand, so that the anvil cannot shake during rotation, and stability of the anvil is improved during rotation, on the other hand, the second bearing 114 reduces rotation resistance of the anvil, the second bearing 114 is sleeved on the anvil, the outer side of the second bearing 114 is axially fixed with the output hole 113, the inner side of the second bearing 114 is axially fixed with the anvil, and accordingly the anvil and the output hole 113 are axially fixed, and further, the anvil cannot move relative to the output hole 113 along the axial direction of the anvil during operation, namely, the anvil cannot move relative to the output hole 113 front and back during operation.

As an implementation manner, the second bearing 114 includes an inner ring 1141, an outer ring 1142, a plurality of balls 1143 disposed between the inner ring 1141 and the outer ring 1142, a first rolling groove 11411 in which the balls 1143 roll is disposed along an outer circumference of the inner ring 1141, a second rolling groove 11421 in which the balls 1143 roll is disposed along an inner circumference of the outer ring 1142, the balls 1143 are at least partially disposed in the first rolling groove 11411, and the balls 1143 are at least partially disposed in the second rolling groove 11421, so that the inner ring 1141 and the outer ring 1142 are axially fixed therebetween, the outer ring 1142 and the output hole 113 are axially fixed therebetween, and the inner ring 1141 and the anvil 13 are axially fixed therebetween.

By the arrangement, the second bearing 114 is a thin-wall double-groove ball bearing, the thickness of the thin-wall double-groove ball bearing is smaller, and the length of the anvil 13 can be reduced, so that the length of the utility model is smaller and the compactness is better. In addition, the second bearing 114 reduces the resistance of the anvil 13 to rotate, specifically, when the anvil 13 rotates, the anvil 13 drives the inner ring 1141 to rotate, the inner ring 1141 and the outer ring 1142 rotate relatively, one side of the ball abuts against the bottom of the first rolling groove 11411, the other side of the ball abuts against the bottom of the second rolling groove 11421, so that the inner ring 1141 and the outer ring 1142 are always coaxial, the anvil 13 cannot shake left and right when rotating, when the inner ring 1141 and the outer ring 1142 rotate relatively, the ball rolls between the inner ring 1141 and the outer ring 1142, when the inner ring 1141 and the anvil 13 are axially fixed, the inner ring 1141 cannot move along the axial direction of the anvil 13, and when the output hole 113 and the outer ring 1142 are axially fixed, the outer ring 1142 cannot move along the axial direction of the output hole 113, and the output hole 113 and the anvil 13 are coaxial, so that when the anvil 13 is working, the anvil 13 cannot move back and forth relative to the output hole 113.

As an implementation manner, a first limit groove 133 is provided along the outer circumference of the anvil 13, the inner ring 1141 is abutted against the first clamp spring 11412, the inner side of the first clamp spring 11412 is embedded into the first limit groove 133 to prevent the inner ring 1141 from moving along the axial direction of the anvil 13, a second limit groove 1132 is provided along the inner circumference of the output hole 113, the outer ring 1142 is abutted against the second clamp spring 11422, and the outer side of the second clamp spring 11422 is embedded into the second limit groove 1132 to prevent the outer ring 1142 from moving along the axial direction of the output hole 113.

Through the arrangement, the second bearing 114 is more stable in the output hole 113, and particularly, a boss is fixedly connected to the second bearing 114 along the axial direction of the anvil, and the boss is abutted against one side, away from the first clamp spring 11412, of the inner ring 1141, so that the inner ring 1141 and the anvil are axially fixed, and under the action of the second clamp spring 11422, the outer ring 1142 and the output hole 113 are axially fixed, so that the anvil is axially fixed through the inner ring 1141, the outer ring 1142 and the output hole 113, and further, front-back movement of the anvil during operation is prevented.

As an implementation manner, a third limit groove 1131 adapted to the outer ring 1142 is provided along the inner circumference of the output hole 113, and the outer side of the outer ring 1142 is embedded in the third limit groove 1131.

Through the arrangement, axial fixation between the outer ring 1142 and the output hole 113 is realized, when the outer ring 1142 is embedded into the third limiting groove 1131, the wall of one side, away from the second clamp spring 11422, of the third limiting groove 1131 is abutted against the outer ring 1142, and under the action of the third limiting groove 1131 and the second clamp spring 11422, the outer ring 1142 and the output hole 113 are axially fixed.

It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.

Claims (10)

1. The utility model provides an impact tool, its characterized in that includes box (11), sets up rotary device (12) of one side of box (11), sets up anvil (13) of the opposite side of box (11), sets up drive assembly (14) in box (11), drive assembly (14) include connecting axle (141) and follow connecting axle (141) reciprocating motion is in order to strike hammer block (142) of anvil (13), rotary device (12) pass through drive assembly (14) with anvil (13) are connected in order to drive anvil (13) rotation, anvil (13) with be provided with between connecting axle (141) be used for right connecting axle (141) are exerted thrust in order to prevent connecting axle (141) take place elastic component (15) of front and back drunkenness when hammer block (142) move.

2. An impact tool according to claim 1, characterized in that a first bearing (1411) is provided between the end of the connecting shaft (141) remote from the anvil (13) and the housing (11) to reduce the resistance of the drive assembly in operation.

3. An impact tool as claimed in claim 2, characterized in that the casing (11) comprises a housing (111) and an end cap (112), a housing space for housing the drive assembly (14) is formed between the housing (111) and the end cap (112), the first bearing (1411) is provided between the end cap (112) and the connecting shaft (141), the rotating means (12) is provided on a side of the end cap (112) remote from the housing (111), and an output shaft of the rotating means (12) passes through the end cap (112) and is connected to the connecting shaft (141).

4. An impact tool according to claim 1, characterized in that one end of the connecting shaft (141) is provided with a driving groove (1412), and one end of the anvil (13) is provided with a driving protrusion (131); or, one end of the connecting shaft (141) is provided with a driving protrusion (131), one end of the anvil (13) is provided with a driving groove (1412), and the driving protrusion (131) is at least partially arranged in the driving groove (1412) so as to realize transmission between the connecting shaft (141) and the anvil (13).

5. An impact tool according to claim 4, characterized in that the elastic member (15) is provided as a counter-top wave spring, which counter-top wave spring housing is provided on the driving protrusion (131).

6. An impact tool according to claim 5, characterized in that an annular protrusion (132) is fixedly connected to one end of the anvil (13), a receiving groove is formed between the annular protrusion (132) and the driving protrusion (131) and opens towards the connecting shaft (141), and the counter-top wave spring is at least partially arranged in the receiving groove.

7. An impact tool according to claim 1, characterized in that the housing (11) is provided with an output aperture (113), that the anvil (13) is passed through the output aperture (113) and is rotationally connected to the housing (11) by means of a second bearing (114), that the anvil (13) and the second bearing (114) are axially fixed, and that the second bearing (114) and the output aperture (113) are axially fixed.

8. An impact tool as claimed in claim 7, characterized in that the second bearing (114) comprises an inner ring (1141), an outer ring (1142), a number of balls (1143) arranged between the inner ring (1141) and the outer ring (1142), a first rolling groove (11411) for the balls (1143) to roll is arranged along the outer circumference of the inner ring (1141), a second rolling groove (11421) for the balls (1143) to roll is arranged along the inner circumference of the outer ring (1142), the balls (1143) are at least partly arranged in the first rolling groove (11411), and the balls (1143) are at least partly arranged in the second rolling groove (11421) so as to axially fix between the inner ring (1141) and the outer ring (1142), and between the outer ring (1142) and the output hole (113).

9. An impact tool as claimed in claim 8, characterized in that a first limit groove (133) is provided along the outer periphery of the anvil (13), the inner ring (1141) is abutted with a first clamp spring (11412), the inner side of the first clamp spring (11412) is embedded in the first limit groove (133) so as to prevent the inner ring (1141) from moving along the axial direction of the anvil (13), a second limit groove (1132) is provided along the inner periphery of the output hole (113), the outer ring (1142) is abutted with a second clamp spring (11422), and the outer side of the second clamp spring (11422) is embedded in the second limit groove (1132) so as to prevent the outer ring (1142) from moving along the axial direction of the output hole (113).

10. An impact tool according to claim 8, characterized in that a third limit groove (1131) is provided along the inner periphery of the output hole (113) and adapted to the outer ring (1142), the outer side of the outer ring (1142) being embedded in the third limit groove (1131).