Bearing bush dismounting tool

Abstract

The utility model discloses a bearing bush dismounting tool which comprises a small-diameter part, a large-diameter part and a knocking part, the small-diameter part, the large-diameter part and the knocking part are located on the same cylindrical part, the center line of the small-diameter part, the center line of the large-diameter part and the center line of the knocking part coincide, the small-diameter part is located in front of the large-diameter part, and the knocking part is located behind the large-diameter part. A step is formed at the joint of the small-diameter part and the large-diameter part, the outer diameter of the small-diameter part is smaller than the inner diameter of the bearing bush, the outer diameter of the large-diameter part is larger than the inner diameter of the bearing bush but smaller than the outer diameter of the bearing bush, and the outer diameter of the knocking part is smaller than the outer diameter of the large-diameter part. The small-diameter part extends into the bearing bush, the step at the joint of the small-diameter part and the large-diameter part is stopped at the end part of the bearing bush, and the tail end of the knocking part is knocked with force, so that the bearing bush can be conveniently detached from a machine body, and the reworking efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of engines, specifically to the disassembly of bearing bushes. Background Technology

[0002] With the development of my country's engine industry, the requirements for diesel engine production are becoming increasingly stringent. Sometimes, the engine block needs to be reworked, including the removal of bearings. Directly knocking off the bearings not only easily damages the inner wall of the engine block, causing secondary damage and rendering it unusable, but also results in low work efficiency. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a bearing removal tool to facilitate the removal of the bearing and avoid damage to the inner wall of the machine body.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a bearing disassembly tool, including a small diameter part, a large diameter part, and a striking part. The small diameter part, the large diameter part, and the striking part are located on the same cylindrical part. The center lines of the small diameter part, the large diameter part, and the striking part coincide. The small diameter part is located in front of the large diameter part, and the striking part is located behind the large diameter part. A step is formed at the connection between the small diameter part and the large diameter part. The outer diameter of the small diameter part is smaller than the inner diameter of the bearing. The outer diameter of the large diameter part is larger than the inner diameter of the bearing but smaller than the outer diameter of the bearing. The outer diameter of the striking part is smaller than the outer diameter of the large diameter part.

[0005] According to the above technical solution, the worker inserts the small diameter part into the bearing shell, and the step at the junction of the small diameter part and the large diameter part stops at the end of the bearing shell. By forcefully striking the tail end of the striking part, the bearing shell can be easily removed from the machine body.

[0006] As an improvement, the end of the striking part is provided with a first knurling, which can increase the friction between the striking tool and the striking part and prevent slippage.

[0007] As an improvement, an elastic ring groove is provided on the outer wall of the smaller diameter section, and an elastic ring fits into the groove. The smaller diameter section extends into the bearing bush, and the elastic ring is in close contact with the inner wall of the bearing bush. The smaller diameter section is positioned in the bearing bush, preventing the larger diameter section from contacting the inner wall of the machine body and causing damage to the machine body.

[0008] Alternatively, two elastic ring grooves are used, distributed axially along the minor diameter portion. This allows the minor diameter portion to be positioned within the bearing bush.

[0009] As an improvement, an extension rod is fitted to the tail end of the striking part, and the extension rod is detachably connected to the striking part. When the hole where the bearing bush is located is deep, the worker can remove the bearing bush by striking the extension rod.

[0010] As a structural option, the extension rod has a sleeve at its front end, which fits over the tail end of the striking part. The tail end of the extension rod has a second knurling. The second knurling increases the friction between the striking tool and the extension rod, preventing slippage.

[0011] As an improvement, the inner wall of the sleeve is provided with an annular groove, in which a rubber ring fits. The rubber ring is in close contact with the tail end of the striking part, preventing the extension rod from separating from the striking part, especially when the extension rod is located below and the striking part is located above.

[0012] This utility model's bearing removal tool can quickly and accurately remove bearings that need to be reworked, improving rework efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings:

[0014] Figure 1 A schematic diagram of the first embodiment of the bearing removal fixture;

[0015] Figure 2 for Figure 1 The main view;

[0016] Figure 3 A schematic diagram of the second embodiment of the bearing removal fixture;

[0017] Figure 4 This is a schematic diagram of the third embodiment of the bearing removal tool.

[0018] Explanation of symbols in the diagram:

[0019] 10. Small diameter section; 11. Elastic ring;

[0020] 20. Large diameter part;

[0021] 30. Percussion section; 31. First knurling;

[0022] 40. Steps;

[0023] 50. Extension rod; 51. Sleeve part; 52. Second knurling; 53. Rubber ring. Detailed Implementation

[0024] First Embodiment

[0025] Combination Figure 1 , Figure 2A bearing removal tool includes a small diameter portion 10, a large diameter portion 20, and a striking portion 30. The small diameter portion, the large diameter portion, and the striking portion are located on the same cylindrical part. The center lines of the small diameter portion, the large diameter portion, and the striking portion coincide. The small diameter portion is located in front of the large diameter portion, and the striking portion is located behind the large diameter portion. A step 40 is formed at the junction of the small diameter portion and the large diameter portion. The outer diameter of the small diameter portion is smaller than the inner diameter of the bearing. The outer diameter of the large diameter portion is larger than the inner diameter of the bearing but smaller than the outer diameter of the bearing. The outer diameter of the striking portion is smaller than the outer diameter of the large diameter portion.

[0026] The striking part 30 has a first knurling 31 at its tail end.

[0027] The worker inserts the small diameter portion 10 into the bearing bush, where the step 40 at the junction of the small diameter portion and the large diameter portion stops at the end of the bearing bush. By forcefully striking the tail end of the striking portion 30, the bearing bush can be easily removed from the machine body.

[0028] Second Embodiment

[0029] like Figure 3 A bearing removal tool includes a small diameter portion 10, a large diameter portion 20, and a striking portion 30. The small diameter portion, the large diameter portion, and the striking portion are located on the same cylindrical part. The center lines of the small diameter portion, the large diameter portion, and the striking portion coincide. The small diameter portion is located in front of the large diameter portion, and the striking portion is located behind the large diameter portion. A step 40 is formed at the junction of the small diameter portion and the large diameter portion. The outer diameter of the small diameter portion is smaller than the inner diameter of the bearing. The outer diameter of the large diameter portion is larger than the inner diameter of the bearing but smaller than the outer diameter of the bearing. The outer diameter of the striking portion is smaller than the outer diameter of the large diameter portion.

[0030] The striking part 30 has a first knurling 31 at its tail end.

[0031] An elastic ring groove is provided on the outer wall of the small diameter portion 10, and an elastic ring 11 is fitted in the elastic ring groove.

[0032] There are two elastic ring grooves, which are distributed along the axial direction of the minor diameter portion 10.

[0033] Third Embodiment

[0034] like Figure 4 A bearing removal tool includes a small diameter portion 10, a large diameter portion 20, and a striking portion 30. The small diameter portion, the large diameter portion, and the striking portion are located on the same cylindrical part. The center lines of the small diameter portion, the large diameter portion, and the striking portion coincide. The small diameter portion is located in front of the large diameter portion, and the striking portion is located behind the large diameter portion. A step 40 is formed at the junction of the small diameter portion and the large diameter portion. The outer diameter of the small diameter portion is smaller than the inner diameter of the bearing. The outer diameter of the large diameter portion is larger than the inner diameter of the bearing but smaller than the outer diameter of the bearing. The outer diameter of the striking portion is smaller than the outer diameter of the large diameter portion.

[0035] The striking part 30 has a first knurling 31 at its tail end.

[0036] The end of the striking part 30 is fitted with an extension rod 50, which is detachably connected to the striking part.

[0037] The extension rod 50 has a sleeve portion 51 at its front end, which is fitted onto the tail end of the striking portion 30. The tail end of the extension rod 50 has a second knurling 52.

[0038] The inner wall of the sleeve portion 51 is provided with an annular groove, and a rubber ring 53 is fitted in the annular groove.

[0039] When the hole where the bearing bush is located is deep, the worker inserts the small diameter part 10 into the bearing bush. The step 40 at the junction of the small diameter part and the large diameter part stops at the end of the bearing bush. By forcefully striking the end of the extension rod 50, the bearing bush can be easily removed from the machine body.

[0040] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A bearing bush disassembly fixture, comprising a small-diameter portion (10), a large-diameter portion (20), and a striking portion (30), wherein the small-diameter portion, the large-diameter portion, and the striking portion are located on the same cylindrical part, the center lines of the small-diameter portion, the large-diameter portion, and the striking portion coincide, the small-diameter portion is located in front of the large-diameter portion, and the striking portion is located behind the large-diameter portion, characterized in that: The junction between the small diameter section and the large diameter section is formed with a step (40). The outer diameter of the small diameter section is smaller than the inner diameter of the bearing bush, the outer diameter of the large diameter section is larger than the inner diameter of the bearing bush but smaller than the outer diameter of the bearing bush, and the outer diameter of the striking section is smaller than the outer diameter of the large diameter section.

2. The bearing bush disassembly fixture as described in claim 1, characterized in that: The striking part (30) has a first knurling (31) at its tail end.

3. The bearing bush disassembly fixture as described in claim 1, characterized in that: The outer wall of the small diameter portion (10) is provided with an elastic ring groove, and an elastic ring (11) is fitted in the elastic ring groove.

4. The bearing bush disassembly fixture as described in claim 3, characterized in that: There are two elastic ring grooves, which are distributed along the axial direction of the small diameter portion (10).

5. The bearing bush disassembly fixture as described in claim 1, characterized in that: The end of the striking part (30) is fitted with an extension rod (50), which is detachably connected to the striking part.

6. The bearing bush disassembly fixture as described in claim 5, characterized in that: The extension rod (50) has a sleeve portion (51) at the front end, which is fitted onto the tail end of the striking portion (30), and the tail end of the extension rod (50) has a second knurling (52).

7. The bearing bush disassembly fixture as described in claim 6, characterized in that: The inner wall of the sleeve part (51) is provided with an annular groove, and a rubber ring (53) is fitted in the annular groove.

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