Electric drive assembly half shaft oil seal dismounting tool

Abstract

The utility model belongs to electric drive technical field, concretely relates to a kind of electric drive assembly half shaft oil seal dismounting tool, including handle and three or more than rod body, three or more than the one end of rod body is uniformly provided with clasp and the other end is fixed with handle, three or more than the rod body is distributed along the axis of handle and is inclined to the axis of handle on handle relative setting, to make three or more than the distance between the side of one end of rod body provided with clasp be greater than the distance between the side of one end of connection handle, the clasp is extended and set towards the direction of departing from the axis of handle, three or more than the rod body can be elastically deformed under external force, to make three or more than the distance between the side of one end of rod body provided with clasp reduce.The utility model can realize directly pulling and dismounting oil seal from the outside of reduction gearbox shell, improve efficiency, and tool overall structure is simple, overall easy to process, low in cost, convenient to carry.

Description

Technical Field

[0001] This utility model belongs to the field of electric drive technology, specifically relating to a tool for disassembling the oil seal of an electric drive assembly half shaft. Background Technology

[0002] In electric drive systems, oil seals are required to isolate the gearbox cavity from the external atmosphere. When replacing the oil seal for later testing or maintenance of the electric drive assembly, removing the half-shaft and then opening the gearbox housing to knock the oil seal from the inside is cumbersome. Alternatively, removing the half-shaft without opening the gearbox housing and forcibly prying the seal out with a pry bar or similar tool can easily scratch the inner mounting surface of the gearbox housing, causing lubricating oil inside the electric drive assembly to leak along the scratched areas after the new oil seal is installed. While existing technologies provide tools for removing oil seals from the outside of the gearbox housing, these tools are relatively complex, cumbersome to operate, and expensive. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a tool for removing the oil seal of the electric drive assembly half shaft that can be directly pulled out from the outside of the gearbox housing, improving efficiency, and with a simple overall structure, easy to process, low cost, and easy to carry.

[0004] This utility model includes a handle and three or more rods. Each of the three or more rods has a hook at one end and is fixed to the handle at the other end. The three or more rods are distributed circumferentially on the handle along its axis and are all inclined relative to the handle's axis, such that the distance between the sides of the three or more rods with hooks is greater than the distance between the sides of the rods connected to the handle. The hooks extend in a direction away from the handle's axis. The three or more rods can undergo elastic deformation under external force, thereby reducing the distance between the sides of the three or more rods with hooks.

[0005] Furthermore, the hook is integrally formed with the rod body on which it is located, and the end of the rod body away from the handle is bent in a direction away from the handle axis to form the hook.

[0006] Furthermore, the rod and the hook are made of stainless steel.

[0007] Furthermore, the end of the hook is inclined relative to the axis of the handle.

[0008] Furthermore, the middle portions of the three or more rods and / or the ends of the three or more rods near the handle are connected by fasteners.

[0009] Furthermore, the fixing element is a fixing ring.

[0010] Furthermore, the fixing ring has two rings, which are spaced apart and positioned on the area from one end of the handle of the three or more rods to the middle of the three or more rods.

[0011] Furthermore, the fixing ring is welded and fixed to three or more rods.

[0012] Furthermore, the sides of the handle are curved.

[0013] Furthermore, the handle is made of wood or rubber.

[0014] The beneficial effects of this utility model are as follows: After removing the half-shaft, the operator can easily insert all the hooks along the oil seal axially into the gearbox housing by pinching the ends of three or more rods with hooks close together. After the three or more rods are released and return to their original shape, the hooks at the ends of the three or more rods hook onto the inner side of the oil seal inside the gearbox housing. At this point, by pulling the entire tool, the oil seal can be directly pulled out and removed from the outside of the gearbox housing without opening the gearbox housing, greatly reducing disassembly steps and time, and improving maintenance efficiency. It also avoids contact between the tool and the inner cavity mounting surface of the gearbox housing during operation, thus preventing scratches on the inner cavity mounting surface caused by oil seal disassembly. After the new oil seal is installed, there will be no lubricating oil leakage due to scratches on the inner cavity mounting surface. The overall structure of the tool is simple; there is no need for a hinge structure or movable mating structure between the handle and the rods. The tool is easy to manufacture and has low cost. It is also easy to operate, lightweight, and portable, making it suitable for on-site maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the half-shaft oil seal disassembly tool for the electric drive assembly of this utility model.

[0016] Figure 2 This is a schematic diagram showing the usage status of the half-shaft oil seal disassembly tool for the electric drive assembly of this utility model.

[0017] In the diagram: 1. Handle; 2. Rod; 3. Hook; 4. Retaining ring; 100. Oil seal. Detailed Implementation

[0018] like Figure 1 and Figure 2As shown, this utility model provides a tool for disassembling the half-shaft oil seal of an electric drive assembly, including a handle 1 and three or more rods 2. Each of the three or more rods 2 has a hook 3 at one end and is fixed to the handle 1 at the other end. The three or more rods 2 are circumferentially distributed along the axis of the handle 1 and are all inclined relative to the axis of the handle 1, so that the distance between the sides of the three or more rods 2 with hooks 3 is greater than the distance between the sides of the rods 2 connected to the handle 1. The hooks 3 extend in a direction away from the axis of the handle 1. The three or more rods 2 can undergo elastic deformation under external force, thereby reducing the distance between the sides of the three or more rods 2 with hooks 3.

[0019] Based on the above configuration, through the inclined design and elastic deformation capability of the rod 2, after removing the half-shaft, the operator can easily extend all the hooks 3 along the axial direction of the oil seal 100 into the gearbox housing by pinching the ends of three or more rods 2 with hooks 3 close together. After the three or more rods 2 are released and return to their original deformation, the hooks 3 at the ends of the three or more rods 2 hook onto the inside of the oil seal 100 inside the gearbox housing, i.e. Figure 2 As shown in the diagram, by pulling the tool along the direction of the arrow, the oil seal 100 can be directly pulled out from the outside of the gearbox housing without opening the gearbox housing, significantly reducing disassembly steps and time, and improving maintenance efficiency. It also avoids contact between the tool and the inner cavity mounting surface of the gearbox housing during operation, thus preventing scratches on the inner cavity mounting surface caused by oil seal 100 removal. After installing a new oil seal 100, there will be no lubricating oil leakage due to scratches on the inner cavity mounting surface. The tool has a simple overall structure; no hinge or movable mating structure is needed between the handle 1 and the rod 2. The tool is easy to manufacture and has low cost. It is also easy to operate, lightweight, and portable, making it suitable for on-site maintenance.

[0020] The hook 3 is integrally formed with the rod 2 on which it is located. The end of the rod 2 away from the handle 1 is bent in a direction opposite to the axis of the handle 1, thereby forming the hook 3. The integral design avoids stress concentration at the connection between the hook 3 and the rod 2, improves the overall mechanical strength of the tool, makes it less likely for the hook 3 and the rod 2 to break during the pulling process, and extends the service life of the tool.

[0021] The rod body 2 and the hook 3 are made of metal, preferably stainless steel. Stainless steel is not easy to rust and has good elastic modulus and fatigue strength, ensuring that the rod body 2 can basically return to its original shape after repeated deformation, thus ensuring the reliability and service life of the tool.

[0022] The end of the hook 3 is inclined relative to the axis of the handle 1, and the end of the hook 3 is the end used to engage with the inner side of the oil seal 100. The inclined end of the hook 3 makes it easier to extend into the gap inside the oil seal 100 and to hook the oil seal 100.

[0023] The three or more rods 2 are connected by fasteners at their middle sections and / or at their ends near the handle 1. Based on the fact that the ends of the three or more rods 2 equipped with hooks 3 can elastically deform under external force, this design allows the fasteners to constrain the radial deformation of the three or more rods 2 to a certain extent, preventing excessive deformation or separation of the three or more rods 2 when pulling out the oil seal 100, thus ensuring the reliability of the tool.

[0024] The fixing element is a retaining ring 4, which effectively constrains the radial deformation of three or more rods 2 while maintaining tool symmetry and not hindering normal operation. Preferably, there are two retaining rings 4, spaced apart and positioned between the end of the three or more rods 2 connected to the handle 1 and the middle of the three or more rods 2. The two retaining rings 4 provide segmented radial constraint, preventing bending or twisting of the three or more rods 2 over medium to long distances, thus optimizing structural rigidity.

[0025] The fixing ring 4 is welded and fixed to three or more rods 2 without the need for additional fixing parts, which further simplifies the tool structure and can effectively ensure the reliability of the connection between the fixing ring 4 and the three or more rods 2, and maintain the integrity of the tool structure under high load pulling.

[0026] Preferably, the number of rods 2 is three. In other embodiments, the number of rods 2 can also be four or five.

[0027] The handle 1 has an arc-shaped side that fits the curvature of the palm better, providing a comfortable grip, improving grip stability, and making it easier to apply force when pulling out the oil seal 100.

[0028] The handle 1 is made of wood or rubber. Compared to metal, wood or rubber is lighter, more portable, and cheaper.

[0029] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0030] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A tool for disassembling the oil seal of an electric drive assembly half-shaft, characterized in that, The device includes a handle (1) and three or more rods (2). One end of each of the three or more rods (2) is provided with a hook (3) and the other end is fixed to the handle (1). The three or more rods (2) are distributed circumferentially on the handle (1) along the axis of the handle (1) and are all inclined relative to the axis of the handle (1) so that the distance between the sides of the three or more rods (2) with hooks (3) is greater than the distance between the sides of the handle (1) connected to the handle (1). The hooks (3) extend in a direction away from the axis of the handle (1). The three or more rods (2) can undergo elastic deformation under the action of external force so that the distance between the sides of the three or more rods (2) with hooks (3) is reduced.

2. The electric drive assembly half-shaft oil seal disassembly tool as described in claim 1, characterized in that, The hook (3) is integrally formed with the rod (2) on which it is located. The end of the rod (2) away from the handle (1) is bent in a direction away from the axis of the handle (1) to form the hook (3).

3. The electric drive assembly half-shaft oil seal disassembly tool as described in claim 2, characterized in that, The rod (2) and the hook (3) are made of stainless steel.

4. The electric drive assembly half-shaft oil seal disassembly tool as described in any one of claims 1-3, characterized in that, The end of the hook (3) is inclined relative to the axis of the handle (1).

5. The electric drive assembly half-shaft oil seal disassembly tool as described in any one of claims 1-3, characterized in that, The middle portions of three or more of the rods (2) and / or the ends of three or more of the rods (2) near the handle (1) are connected by fasteners.

6. The electric drive assembly half-shaft oil seal disassembly tool as described in claim 5, characterized in that, The fastener is a fixing ring (4).

7. The electric drive assembly half-shaft oil seal disassembly tool as described in claim 6, characterized in that, The fixing ring (4) has two rings, which are spaced apart and arranged on the area from one end of the handle (1) of the three or more rods (2) to the middle of the three or more rods (2).

8. The electric drive assembly half-shaft oil seal disassembly tool as described in claim 6 or 7, characterized in that, The fixing ring (4) is welded and fixed to three or more rods (2).

9. The electric drive assembly half-shaft oil seal disassembly tool as described in any one of claims 1-3, 6, and 7, characterized in that, The side of the handle (1) is curved.

10. The electric drive assembly half-shaft oil seal disassembly tool as described in any one of claims 1-3, 6, and 7, characterized in that, The handle (1) is made of wood or rubber.

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