Aluminum head shell matching device for electric wrench

Abstract

The utility model relates to the technical field of electric wrench assemblies, in particular to an aluminum head shell matching device for an electric wrench, which comprises an aluminum head shell and a shaft sleeve, a rotating shaft hole and a mounting hole which are communicated with each other are respectively formed at two ends of the aluminum head shell, and the shaft sleeve is inserted and clamped in the rotating shaft hole. A plurality of connecting lugs are connected to the periphery of one end, where the mounting hole is formed, of the aluminum head shell; a plurality of installation pieces are symmetrically arranged on the periphery of the end, facing the installation hole, of the shaft sleeve with the axis of the shaft sleeve as the axis of the shaft sleeve as the axis, inserting grooves allowing the installation pieces to be embedded in a one-to-one correspondence mode are formed in the hole bottom of the installation hole, and a clamping spring is installed between the end, away from the installation hole, of the shaft sleeve and the hole wall of the rotating shaft hole. The shaft sleeve is sleeved with the clamping spring. The aluminum head shell has the effect of improving the disassembly and assembly convenience degree of the shaft sleeve in the aluminum head shell.

Description

Technical Field

[0001] The present application relates to the technical field of electric wrench components, and in particular to an aluminum head shell matching device for an electric wrench. Background Art

[0002] The electric wrench is a convenient and efficient tool, commonly used to tighten screws and bolts. One of its key components is the aluminum head shell. As the outer shell of the electric wrench, the aluminum head shell not only provides solid protection for the internal mechanical components, but also has good heat dissipation performance. The power-driven tungsten steel shaft is inserted into the aluminum head shell. Some electric wrenches will be equipped with a sleeve at the aluminum head shell to reduce the wear between the tungsten steel shaft and the aluminum head shell, thereby reducing the heat generated by friction and improving the performance and stability of the electric wrench.

[0003] Conventional aluminum head shells and sleeves are pressed into the aluminum head shell through interference fit. The sleeve is pressed into the aluminum head shell and pressed tightly with the aluminum head shell. The sleeve is in direct contact with the moving parts and is subjected to continuous wear in a high-speed, high-friction environment. Therefore, the sleeve is more prone to wear and damage and needs to be replaced regularly to ensure the normal operation of the electric wrench and the protection of mechanical parts.

[0004] The conventional interference fit method is troublesome to disassemble and assemble, and may damage the inside of the aluminum head shell during disassembly and assembly, which increases the cost of disassembly and assembly, and there is still room for improvement. Utility Model Content

[0005] In order to improve the convenience of disassembly and assembly of the shaft sleeve in the aluminum head shell, the present application provides an aluminum head shell matching device for an electric wrench.

[0006] The aluminum head shell matching device for an electric wrench provided in the present application adopts the following technical solution:

[0007] An aluminum head shell matching device for an electric wrench comprises an aluminum head shell and a shaft sleeve, wherein two ends of the aluminum head shell are respectively formed with a connected rotating shaft hole and a mounting hole, the shaft sleeve is inserted into and clamped with the rotating shaft hole, and the aluminum head shell is connected to a plurality of connecting ears at the outer periphery of one end of the mounting hole; a plurality of mounting plates are symmetrically arranged on the outer periphery of the end of the shaft sleeve facing the mounting hole with the axis of the shaft sleeve as the axis, a slot for the mounting plates to be embedded one by one is provided at the bottom of the mounting hole, a retaining spring is installed between the end of the shaft sleeve away from the mounting hole and the hole wall of the rotating shaft hole, and the retaining spring is sleeved on the shaft sleeve.

[0008] By adopting the above technical scheme, during installation, the sleeve is inserted into the shaft hole from the rear, so that the mounting plates are embedded in the slots one by one. At this time, the slot wall of the slot limits the rotation of the mounting plates, and the rear end of the sleeve is fixed; the retaining spring is arranged at the front end of the sleeve to prevent the axial movement of the sleeve, and the front end of the sleeve is also fixed. At the same time, the outer periphery of the sleeve is inserted to abut against the hole wall of the shaft hole. The three cooperate to prevent the sleeve from rotating synchronously with the shaft, thereby realizing the snap-fit ​​of the sleeve on the aluminum head shell, replacing the conventional interference fit method, and improving the convenience of disassembly of the sleeve.

[0009] Optionally, a gripping opening is provided on a side of the mounting plate facing the mounting hole.

[0010] By adopting the above technical solution, after removing the aluminum head shell from the head of the electric wrench, the holding openings on both sides can be clamped with tools to pull the sleeve out of the shaft hole, thereby reducing the difficulty of removing the sleeve.

[0011] Optionally, the hole wall of the gripping opening is provided with anti-slip grooves.

[0012] Optionally, an anti-skid layer is provided on the outer periphery of the sleeve, and the outer periphery of the anti-skid layer abuts against the hole wall of the rotating shaft hole.

[0013] By adopting the above technical solution, the design of the anti-skid layer increases the friction, and further improves the reliability of the shaft sleeve being locked and fixed on the aluminum head shell.

[0014] Optionally, a material-saving opening is circumferentially provided on one side of the mounting plate.

[0015] By adopting the above technical solution, the shape of the mounting plate is controlled to ensure that the mounting plate can meet the embedding locking requirements and the gripping clearance requirements while achieving a lightweight design of the mounting plate, thereby reducing the production cost of the sleeve and the weight of the electric wrench head.

[0016] Optionally, the aluminum head shell is provided with a plurality of positioning inserts spaced circumferentially at one end of the mounting hole.

[0017] By adopting the above technical solution, the positioning plug is inserted at the corresponding position of the electric wrench, thereby cooperating with the mounting structure at the connecting ear to achieve double locking of the aluminum head shell installation and fixation.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. The present application changes the conventional interference fit into a snap fit. During installation, the shaft sleeve is inserted into the shaft hole from the rear so that the mounting plates are embedded in the slots one by one. At this time, the slot wall of the slot limits the rotation of the mounting plates, and the circumferential rotation of the shaft sleeve is restricted; the retaining spring is arranged at the front end of the shaft sleeve, and the axial movement of the shaft sleeve is restricted. At the same time, the outer periphery of the shaft sleeve is inserted to abut against the hole wall of the shaft hole. The three cooperate to prevent the shaft sleeve from rotating synchronously with the shaft, and the snap fit of the shaft sleeve on the aluminum head shell can be achieved. During disassembly, there is no need to adopt auxiliary disassembly methods such as heating, cooling, and lubrication. Only the shaft sleeve needs to be pulled out, and the disassembly of the shaft sleeve is not easy to damage the inner wall of the aluminum head shell, thereby not easily affecting the installation of the new shaft sleeve, and can adapt to the replacement needs of the shaft sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the aluminum head shell matching device for the electric wrench according to the embodiment of the present application.

[0021] Figure 2 yes Figure 1 Sectional view of AA.

[0022] Figure 3 It is a schematic diagram of the structure of the shaft sleeve according to an embodiment of the present application.

[0023] Explanation of the reference numerals: 1. Aluminum head shell; 11. Shaft hole; 12. Mounting hole; 13. Connecting ear; 14. Positioning insert; 15. Slot; 2. Bushing; 21. Slot; 22. Anti-skid layer; 23. Mounting sheet; 231. Material-saving opening; 232. Grip opening; 233. Anti-skid pattern; 24. Embedded clearance groove; 3. Retaining spring. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-3 This application is described in further detail.

[0025] A coordinate system XYZ is set in this article, wherein the positive direction of the Z axis represents the top, the negative direction of the Z axis represents the bottom, the positive direction of the Y axis represents the front, the negative direction of the Y axis represents the back, the positive direction of the X axis represents the right, and the negative direction of the X axis represents the left.

[0026] The present application embodiment discloses an aluminum head shell matching device for an electric wrench. Figure 1 The aluminum head shell matching device for the electric wrench includes an aluminum head shell 1 and a shaft sleeve 2. A shaft hole 11 and a mounting hole 12 are respectively formed inside the left and right ends of the aluminum head shell 1. The shaft hole 11 is connected to the mounting hole 12. The shaft hole 11 is used to insert the shaft sleeve 2, and the mounting hole 12 is used to accommodate the parts of the electric wrench head.

[0027] Four connecting ears 13 are formed at intervals on the outer circumference of the right end of the aluminum head shell 1, and the connecting ears 13 can be screwed to the head of the electric wrench. In order to enhance the stability of the installation, a plurality of positioning inserts 14 are formed in an integral manner at intervals around the mounting hole 12 at the right end of the aluminum head shell 1. There are multiple pairs of positioning inserts 14, and each pair of positioning inserts 14 is symmetrically arranged with the axis of the rotating shaft hole 11 as the axis. The positioning inserts 14 are staggered with the connecting ears 13. The positioning inserts 14 can be inserted into the head of the electric wrench, thereby cooperating with the mounting structure at the connecting ears 13 to achieve double locking of the aluminum head shell 1 for installation and fixation.

[0028] Reference Figure 2 and Figure 3 A slot 21 is provided at the joint between the outer periphery of the left end of the sleeve 2 and the hole wall of the shaft hole 11. The upper and lower adjacent slots 21 cooperate to form a complete annular slot 21. A retaining spring 3 is sleeved and installed in the slot 21. The retaining spring 3 is arranged at the left end of the sleeve 2 to prevent the sleeve 2 from moving axially left and right. Furthermore, an anti-skid layer 22 is provided at the outer periphery of the sleeve 2. The outer periphery of the anti-skid layer 22 abuts against the hole wall of the shaft hole 11, and the axial movement of the sleeve 2 is also restricted. The anti-skid layer 22 can be a texture design formed on the outer periphery of the sleeve 2, a conventional anti-skid texture coating coated on the outer periphery of the sleeve 2, or a silicone layer sleeved on the outer periphery of the sleeve 2. The present application takes the silicone layer as an example.

[0029] The outer periphery of the right end of the sleeve 2 is symmetrically arranged with a plurality of mounting plates 23 about the axis of the sleeve 2. The present application takes a semi-circular mounting plate 23 at the front and rear as an example, and an embedded clearance groove 24 is formed between adjacent mounting plates 23. The bottom of the mounting hole 12 is provided with a slot 15 for the mounting plates 23 to be embedded one by one. When the tungsten steel shaft inserted in the sleeve 2 rotates, the slot wall of the slot 15 limits the synchronous rotation of the mounting plates 23, and the circumferential rotation of the sleeve 2 is limited.

[0030] In addition, the right side of the mounting piece 23 is formed with a circumferential material-saving opening 231 during processing, so that the diameter of the mounting piece 23 gradually decreases from left to right to form an inclined surface. The right side of the mounting piece 23 is also provided with a gripping opening 232, which penetrates outward, and the hole wall of the gripping opening 232 is processed with anti-slip grooves 233. The shape and thickness of the mounting piece 23 are controlled to ensure that the mounting piece 23 can meet the requirements of embedded locking and gripping and giving way, while achieving a lightweight design.

[0031] The implementation principle of the aluminum head shell matching device for an electric wrench in the embodiment of the present application is as follows: during installation, the sleeve 2 is inserted into the shaft hole 11 from the rear, so that the mounting pieces 23 are embedded in the slots 15 one by one. At this time, the slot wall of the slot 15 limits the rotation of the mounting pieces 23, and the retaining spring 3 is installed. The retaining spring 3 and the slot bottom of the slot 15 both play a role in preventing the axial movement of the sleeve 2, and the anti-slip layer 22 further limits the displacement and rotation of the sleeve 2. Then the aluminum head shell 1 can be installed on the head of the electric wrench.

[0032] When the sleeve 2 needs to be replaced, there is no need to use auxiliary disassembly methods such as heating, cooling, and lubrication. It is only necessary to clamp the holding opening 232 with a tool and pull out the sleeve 2. At this time, the removal of the sleeve 2 is not easy to damage the inner wall of the aluminum head shell 1, so it is not easy to affect the installation of the new sleeve 2. The new sleeve 2 is reinstalled according to the above method.

[0033] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An aluminum head shell matching device for an electric wrench, characterized in that: The invention comprises an aluminum head shell (1) and a shaft sleeve (2), wherein two ends of the aluminum head shell (1) are respectively formed with a connected shaft hole (11) and a mounting hole (12), the shaft sleeve (2) is inserted into and clamped with the shaft hole (11), and the aluminum head shell (1) is connected to a plurality of connecting ears (13) at the outer periphery of one end of the mounting hole (12); a plurality of mounting plates (23) are symmetrically arranged on the outer periphery of one end of the shaft sleeve (2) facing the mounting hole (12) with the axis of the shaft sleeve (2) as the axis, and a slot (15) is provided at the bottom of the mounting hole (12) for the mounting plates (23) to be embedded one by one, and a retaining spring (3) is installed between the end of the shaft sleeve (2) away from the mounting hole (12) and the hole wall of the shaft hole (11), and the retaining spring (3) is sleeved on the shaft sleeve (2).

2. The aluminum head shell matching device for an electric wrench according to claim 1, characterized in that: A gripping opening (232) is provided on one side of the mounting piece (23) facing the mounting hole (12).

3. The aluminum head shell matching device for an electric wrench according to claim 2, characterized in that: The hole wall of the gripping opening (232) is provided with anti-slip grooves (233).

4. The aluminum head shell matching device for an electric wrench according to claim 2, characterized in that: The outer periphery of the shaft sleeve (2) is provided with an anti-skid layer (22), and the outer periphery of the anti-skid layer (22) abuts against the hole wall of the rotating shaft hole (11).

5. The aluminum head shell matching device for an electric wrench according to claim 4, characterized in that: A material saving opening (231) is circumferentially provided on one side of the installation piece (23).

6. An aluminum head shell matching device for an electric wrench according to any one of claims 2 to 5, characterized in that: The aluminum head shell (1) is provided with a plurality of positioning inserts (14) at intervals in the circumferential direction at one end of the mounting hole (12).

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