Cushioning structure of electric impact wrench

Abstract

The utility model discloses a cushioning structure of an electric impact wrench, which comprises an outer casing and a motor, an inner cover casing is arranged in the outer casing, the motor is fixedly mounted in the inner cover casing, an elastic cushioning piece for cushioning is supported between the inner cover casing and the outer casing, an embedding groove is arranged on the inner wall of the outer casing, the elastic cushioning piece is inserted and embedded in the embedding groove to be fixed, and the elastic cushioning piece is fixedly mounted in the embedding groove. A protruding part is arranged on the outer side wall of the inner cover shell, a clamping groove is formed in the elastic cushioning piece, the clamping groove and the protruding part are connected in a clamped mode, first abutting faces abutting against the inner wall of the clamping groove are arranged on the two sides of the protruding part, and the first abutting faces on the two sides are perpendicular to the radial face of a motor shaft of the motor so as to relieve circumferential vibration of the inner cover shell. The elastic cushioning piece can relieve the circumferential vibration transmitted by the motor on the inner housing, the user experience is improved, and the inner housing, the outer housing and the elastic cushioning piece are connected without screws.

Description

Technical Field

[0001] The utility model relates to an electric impact wrench, in particular to a shock absorbing structure of the electric impact wrench. Background Art

[0002] During the installation or maintenance of equipment, it is often necessary to tighten or loosen screws. For some screws with larger diameters, it takes a long time to disassemble and assemble them with a wrench or socket wrench. In addition, it is inconvenient to use a traditional screwdriver or wrench, which has low work efficiency and high labor intensity. As a convenient and efficient screw tightening tool, electric wrenches are now increasingly widely used in home use and construction operations.

[0003] For example, Chinese utility model patent CN203141395U discloses an electric screwdriver, which includes a shell, an output shaft is passed through the front end surface of the shell, a bit jack is provided on the output shaft, a motor for driving the output shaft to rotate around its own axis, and a power supply for providing power to the motor are provided in the shell, and the transmission shaft of the motor is connected to the output shaft through a gear reduction box.

[0004] Another example is the impact screwdriver disclosed in Chinese utility model patent CN203738684U, which includes a housing, a battery disposed in the housing, a motor located inside the housing, a transmission part driven by the motor, and an impact part. The motor has a drive shaft that provides a rotational output, the transmission part decelerates the rotational output of the drive shaft and then rotates it for output, and the impact part includes a hammer, a hammer drill that cooperates with the hammer and is struck by the hammer, and an output shaft that is driven to rotate by the hammer anvil.

[0005] The motor that provides power in the existing impact wrench is generally installed directly in the housing of the impact wrench. When the motor is started, the motor shaft of the motor rotates. During the rotation process, the motor generates a reaction force acting on the housing, causing the housing to vibrate circumferentially, thereby affecting the user experience. Utility Model Content

[0006] Based on the problem that the motor will generate a reaction force acting on the housing during rotation, causing the housing to vibrate in a circumferential direction, thereby affecting the user experience, the utility model provides a shock absorbing structure of an electric impact wrench.

[0007] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: the shock-absorbing structure of the electric impact wrench includes an outer casing and a motor, an inner cover casing is arranged inside the outer casing, the motor is fixedly installed in the inner cover casing, an elastic shock-absorbing member for shock-absorbing is supported between the inner cover casing and the outer casing, an embedding groove is arranged on the inner wall of the outer casing, the elastic shock-absorbing member is inserted and fixed in the embedding groove, a protrusion is arranged on the outer side wall of the inner cover casing, a clamping groove is arranged on the elastic shock-absorbing member, and the clamping groove and the protrusion form a clamping connection, and the two sides of the protrusion have first abutting surfaces abutting against the inner wall of the clamping groove, and the first abutting surfaces on both sides are perpendicular to the radial surface of the motor shaft of the motor to reduce the circumferential vibration of the inner cover casing.

[0008] A further preferred technical solution of the utility model is: the elastic shock-absorbing member includes a first elastic shock-absorbing member and a second elastic shock-absorbing member, the inner cover shell includes a head shell and a shell body, the head shell is detachably fixedly connected to the front part of the shell body, the first elastic shock-absorbing member is arranged between the head shell and the outer shell, and the second elastic shock-absorbing member is arranged between the shell body and the outer shell.

[0009] A further preferred technical solution of the utility model is that two sides of the protrusion engaged with the first elastic shock-absorbing member have second abutment surfaces abutting against the inner wall of the slot, and the second abutment surfaces on both sides are perpendicular to the axial direction of the motor shaft.

[0010] A further preferred technical solution of the utility model is: the outer shell includes a first shell and a second shell, the first shell is provided with a first groove, the second shell is provided with a second groove, after the first shell and the second shell are matched, the first groove and the second groove are combined into an embedding groove for the first elastic shock-absorbing component to be inserted, and a protrusion that is clamped with the first elastic shock-absorbing component is fixed on the head shell, and the protrusion is located on the vertical center plane of the outer shell.

[0011] A further preferred technical solution of the utility model is: the shell body includes a front shell body, a rear shell body and a connecting part connecting the front shell body and the rear shell body, the head shell is fixedly connected to the front part of the front shell body, and is combined with the front shell body to form an assembly cavity, the motor is installed in the rear shell body, and a through hole connecting the front shell body and the rear shell body is provided on the connecting part for the motor shaft to pass through.

[0012] A further preferred technical solution of the utility model is: the front shell body, the connecting part and the rear shell body are all cylindrical structures, the outer diameter of the connecting part is smaller than the front shell body and the rear shell body, so as to form an annular groove on the outer wall of the shell body, and the protrusion that is clamped with the second elastic shock-absorbing component is arranged in the groove, and two convex edges corresponding to the protrusion are provided on the inner wall of the outer shell, and the two convex edges are inserted into the groove, and an embedding groove for the second elastic shock-absorbing component to be inserted is formed between the two convex edges.

[0013] A further preferred technical solution of the utility model is that protrusions for the second elastic shock-absorbing component to be clamped are provided on both sides of the shell body in the groove, and two convex edges corresponding to the protrusions are provided on the inner walls of the outer casing on both sides of the shell body.

[0014] A further preferred technical solution of the utility model is: the rear end of the rear shell body has a first opening, the rear end of the rear shell body is detachably connected to a tail cover, the tail cover and the rear shell body are combined to form a motor cavity for assembling the motor, the rear end of the outer shell is provided with a second opening, and the tail cover is located behind the second opening to cover the second opening of the outer shell.

[0015] A further preferred technical solution of the utility model is: the elastic shock-absorbing component is made of elastic rubber material or elastic silicone material.

[0016] A further preferred technical solution of the utility model is: the outer casing is provided with an integrated handle, and an elastic shock-absorbing pad is fixed on the handle.

[0017] Compared with the prior art, the advantage of the utility model is that an inner cover shell is arranged in an outer casing, the motor is installed in the inner cover shell, an embedding groove is provided on the inner wall of the outer casing, the elastic shock-absorbing component is inserted and fixed in the embedding groove, a protrusion is provided on the outer wall of the inner cover shell, a clamping groove is provided on the elastic shock-absorbing component, the clamping groove and the protrusion form a clamping connection, both sides of the protrusion have a first abutting surface abutting the inner wall of the clamping groove, the first abutting surfaces on both sides are perpendicular to the radial surface of the motor shaft, when the motor is started and the motor shaft rotates, the elastic shock-absorbing component can reduce the circumferential vibration transmitted by the motor to the inner cover shell, thereby improving user experience, and a screw-free connection is realized between the inner cover shell, the outer casing and the elastic shock-absorbing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a disassembled diagram of the elastic shock-absorbing pad and the handle;

[0021] Figure 3 The splitting of the first shell and the second shell Figure 1 ;

[0022] Figure 4 The splitting of the first shell and the second shell Figure 2 ;

[0023] Figure 5 The utility model is cut away and shown Figure 1 ;

[0024] Figure 6 is a schematic diagram of the structure of the first shell;

[0025] Figure 7 It is a schematic diagram of the structure of the inner cover;

[0026] Figure 8 This is a disassembled diagram of the head shell, body and tail cover;

[0027] Fig. 9 The utility model is cut away and shown Figure 2 ;

[0028] Fig.10 The figure is a disassembled diagram of the head shell and the first elastic shock-absorbing component;

[0029] Fig.11 The utility model is cut away and shown Figure 3 ;

[0030] Fig.12 This is a disassembled diagram of the shell body and the second elastic shock-absorbing component.

[0031] In the figure: 1. outer casing; 2. handle; 3. elastic shock-absorbing pad; 4. inner cover shell; 5. first shell; 6. second shell; 7. second groove; 8. convex edge; 9. embedded groove; 10. second elastic shock-absorbing member; 11. first elastic shock-absorbing member; 12. first groove; 13. tail cover; 14. shell body; 15. head shell; 16. motor cavity; 17. through hole; 18. assembly cavity; 19. second opening; 20. first opening; 21. front shell body; 22. connecting part; 23. rear shell body; 24. vertical center plane; 25. raised part; 26. slot; 27. first abutment surface; 28. second abutment surface; 29. ​​groove. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0033] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0034] Figure 1-Figure 12As shown, the shock absorbing structure of the electric impact wrench includes an outer casing 1 and a motor, an inner casing 4 is arranged inside the outer casing 1, the motor is fixedly installed inside the inner casing 4, and an elastic shock absorbing member for shock absorbing is supported between the inner casing 4 and the outer casing 1. The motor is not shown in the drawings.

[0035] Figure 3 , Figure 4 As shown, an embedding groove 9 is provided on the inner wall of the outer casing 1, and the elastic shock-absorbing member is inserted and fixed in the embedding groove 9. A protrusion 25 is provided on the outer wall of the inner cover shell 4, and a clamping groove 26 is provided on the elastic shock-absorbing member. The clamping groove 26 forms a clamping connection with the protrusion 25. Both sides of the protrusion 25 have first abutting surfaces 27 abutting against the inner wall of the clamping groove 26. The first abutting surfaces 27 on both sides are perpendicular to the radial surface of the motor shaft of the motor to reduce the circumferential vibration of the inner cover shell 4 and avoid the vibration generated by the reaction force of the motor acting on the inner cover shell 4 when the motor starts to be transmitted to the outer casing 1, thereby improving the user experience, and realizing a screw-free connection between the inner cover shell 4, the outer casing 1 and the elastic shock-absorbing member.

[0036] Figure 7 , Figure 8 As shown, preferably, the elastic shock-absorbing member includes a first elastic shock-absorbing member 11 and a second elastic shock-absorbing member 10, and the inner cover shell 4 includes a head shell 15 and a shell body 14, the head shell 15 is detachably fixedly connected to the front part of the shell body 14, the first elastic shock-absorbing member 11 is arranged between the head shell 15 and the outer shell 1, and the second elastic shock-absorbing member 10 is arranged between the shell body 14 and the outer shell 1. The elastic shock-absorbing members arranged in the front and rear make the overall shock-absorbing effect better, and can more stably support the inner cover shell 4 in the outer shell 1.

[0037] Preferably, the head shell 15 is fixedly connected to the front portion of the shell body 14 by screws.

[0038] Fig. 9 As shown, the outer housing 1 includes a first housing 5 and a second housing 6, the first housing 5 is provided with a first groove 12, the second housing 6 is provided with a second groove 7, after the first housing 5 and the second housing 6 are matched, the first groove 12 and the second groove 7 are combined to form an embedding groove 9 for the first elastic shock absorbing member 11 to be inserted, and a protrusion 25 engaged with the first elastic shock absorbing member 11 is fixed on the head housing 15, and the protrusion 25 engaged with the first elastic shock absorbing member 11 is located on the vertical center plane 24 of the outer housing 1. Preferably, the protrusion 25 is arranged at the bottom center position of the head housing 15, and the embedding groove 9 is arranged on the inner wall of the outer housing 1 below the protrusion 25.

[0039] During installation, the first elastic shock-absorbing member 11 can be clamped on the raised portion 25 on the head shell 15, and then the first shell 5 and the second shell 6 on both sides are aligned, so that the first groove 12 on the first shell 5 and the second shell 6 are aligned with the second groove 7 to clamp the first elastic shock-absorbing member 11 on the raised portion 25 inside and fix it. After the first shell 5 and the second shell 6 are aligned, they are fixed together by screws.

[0040] Fig.10 As shown, preferably, both sides of the protrusion 25 engaged with the first elastic shock-absorbing member 11 have second abutment surfaces 28 abutting against the inner walls of the slot 26, and the second abutment surfaces 28 on both sides are perpendicular to the axial direction of the motor shaft, so that the first elastic shock-absorbing member 11 can reduce the circumferential vibration of the inner cover shell 4 and the axial vibration of the inner cover shell 4.

[0041] That is, the four sides of the first elastic shock-absorbing member 11, namely, the front, back, left and right sides of the slot 26, are all provided with inner walls for abutting against the protrusion 25. The front and back sides of the protrusion 25 have second abutting surfaces 28 abutting against the front and back inner walls of the slot 26. The left and right sides of the protrusion 25 have first abutting surfaces 27 abutting against the left and right inner walls of the slot 26. The first elastic shock-absorbing member 11 is sleeved on the outside of the protrusion 25 and then inserted into the embedding groove 9 of the outer casing 1.

[0042] Figure 5 As shown, preferably, the shell body 14 includes a front shell body 21, a rear shell body 23, and a connecting portion 22 connected to the front shell body 21 and the rear shell body 23, the head shell 15 is fixedly connected to the front of the front shell body 21, and is combined with the front shell body 21 to form an assembly cavity 18, the motor is installed in the rear shell body 23, and the connecting portion 22 is provided with a through hole 17 connecting the front shell body 21 and the rear shell body 23 to allow the motor shaft to pass through. The front shell body 21, the rear shell body 23 and the connecting portion 22 are integrally formed.

[0043] The assembly cavity 18 can be used to install a transmission component and / or an impact component. The motor is installed in the rear shell body 23. The motor shaft of the motor passes through the through hole 17 and is connected to the transmission component or the impact component in the assembly cavity 18. The transmission component or the impact component in the assembly cavity 18 transmits the rotational power output by the motor to the functional head for tightening screws.

[0044] Figure 5 , Figure 8 As shown, the rear end of the rear shell body 23 has a first opening 20, and the rear end of the rear shell body 23 is detachably connected with a tail cover 13, and the tail cover 13 and the rear shell body 23 are combined to form a motor cavity 16 for assembling the motor, and the rear end of the outer shell 1 is provided with a second opening 19, and the tail cover 13 is located behind the second opening 19 to cover the second opening 19 of the outer shell 1. The tail cover 13 is fixedly connected to the rear end of the rear shell body 23 by screws.

[0045] Fig.11 , Fig.12As shown, preferably, the front shell body 21, the connecting portion 22 and the rear shell body 23 are all cylindrical structures, and the outer diameter of the connecting portion 22 is smaller than that of the front shell body 21 and the rear shell body 23, so as to form an annular groove 29 on the outer wall of the shell body 14, and the protrusion 25 engaged with the second elastic shock-absorbing component 10 is arranged in the groove 29, and two convex edges 8 corresponding to the protrusion 25 are provided on the inner wall of the outer casing 1, and the two convex edges 8 are inserted into the groove 29, and an embedding groove 9 for the second elastic shock-absorbing component 10 to be inserted is formed between the two convex edges 8.

[0046] Preferably, the groove 29 is provided with protrusions 25 for the second elastic shock absorbing member 10 to engage on both sides of the shell body 14, and the inner wall of the outer housing 1 on both sides of the shell body 14 is provided with two convex edges 8 corresponding to the protrusions 25. The convex edges 8 on both sides are respectively arranged on the first shell 5 and the second shell 6.

[0047] Preferably, the elastic shock-absorbing member is made of elastic rubber material or elastic silicone material.

[0048] Preferably, the outer housing 1 is provided with an integrated handle 2, and an elastic shock-absorbing pad 3 is fixed on the handle 2 for shock absorption when holding, so as to achieve a better user experience.

[0049] The above is an introduction to the shock absorbing structure of the electric impact wrench provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. The shock absorbing structure of the electric impact wrench includes an outer casing and a motor, characterized in that: An inner cover shell is provided in the outer shell, and the motor is fixedly installed in the inner cover shell. An elastic shock-absorbing component for shock absorption is supported between the inner cover shell and the outer shell. An embedding groove is provided on the inner wall of the outer shell, and the elastic shock-absorbing component is inserted and fixed in the embedding groove. A protrusion is provided on the outer wall of the inner cover shell, and a clamping groove is provided on the elastic shock-absorbing component. The clamping groove and the protrusion form a clamping connection. Both sides of the protrusion have first abutting surfaces abutting against the inner wall of the clamping groove. The first abutting surfaces on both sides are perpendicular to the radial surface of the motor shaft of the motor to reduce the circumferential vibration of the inner cover shell.

2. The shock absorbing structure of the electric impact wrench according to claim 1, characterized in that: The elastic shock-absorbing member includes a first elastic shock-absorbing member and a second elastic shock-absorbing member, the inner cover shell includes a head shell and a shell body, the head shell is detachably fixedly connected to the front of the shell body, the first elastic shock-absorbing member is arranged between the head shell and the outer shell, and the second elastic shock-absorbing member is arranged between the shell body and the outer shell.

3. The shock absorbing structure of the electric impact wrench according to claim 2, characterized in that: The two sides of the protrusion clamped with the first elastic shock-absorbing member have second abutting surfaces abutting with the inner wall of the clamping groove, and the second abutting surfaces on the two sides are perpendicular to the axial direction of the motor shaft.

4. The shock absorbing structure of the electric impact wrench according to claim 2, characterized in that: The outer shell includes a first shell and a second shell, the first shell is provided with a first groove, the second shell is provided with a second groove, and after the first shell and the second shell are matched, the first groove and the second groove are combined into an embedding groove for inserting the first elastic shock-absorbing component, and a protrusion that is clamped with the first elastic shock-absorbing component is fixed on the head shell, and the protrusion is located on the vertical center plane of the outer shell.

5. The shock absorbing structure of the electric impact wrench according to claim 2, characterized in that: The shell body includes a front shell body, a rear shell body and a connecting part connecting the front shell body and the rear shell body. The head shell is fixedly connected to the front part of the front shell body and is combined with the front shell body to form an assembly cavity. The motor is installed in the rear shell body. The connecting part is provided with a through hole connecting the front shell body and the rear shell body for the motor shaft to pass through.

6. The shock absorbing structure of the electric impact wrench according to claim 5, characterized in that: The front shell body, the connecting part and the rear shell body are all cylindrical structures. The outer diameter of the connecting part is smaller than that of the front shell body and the rear shell body, so as to form an annular groove on the outer wall of the shell body. The protrusion that is clamped with the second elastic shock-absorbing component is arranged in the groove. Two convex edges corresponding to the protrusion are provided on the inner wall of the outer shell. The two convex edges are inserted into the groove, and an embedding groove for the second elastic shock-absorbing component to be inserted is formed between the two convex edges.

7. The shock absorbing structure of the electric impact wrench according to claim 6, characterized in that: The groove is provided with protrusions on both sides of the shell body for the second elastic shock-absorbing member to engage with, and the inner walls of the outer casing on both sides of the shell body are provided with two convex edges corresponding to the protrusions.

8. The shock absorbing structure of the electric impact wrench according to claim 6, characterized in that: The rear end of the rear shell body has a first opening, and a tail cover is detachably connected to the rear end of the rear shell body. The tail cover and the rear shell body are combined to form a motor cavity for assembling the motor. The rear end of the outer shell is provided with a second opening, and the tail cover is located behind the second opening to cover the second opening of the outer shell.

9. The shock absorbing structure of the electric impact wrench according to claim 1, characterized in that: The elastic shock-absorbing component is made of elastic rubber material or elastic silicone material.

10. The shock absorbing structure of the electric impact wrench according to claim 1, characterized in that: The outer casing is provided with an integrated handle, and an elastic shock-absorbing pad is fixed on the handle.

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