A self-sealing bearing seal cage dismounting device

Abstract

The utility model relates to a kind of self-sealing bearing seal cover dismounting device, including support crossbeam, symmetrical gripper, drive plate and drive screw rod.The lower support part of support crossbeam extension is abutted on the upper surface of bearing outer ring, and its lower end inside is equipped with arc locating step, and matching outer diameter realizes accurate positioning;Lower support part inside surface and seal cover keep interference clearance distance.Gripper's hook part hooks seal cover lower edge, limiting portion is clamped above drive plate, main body part passes through the adjusting through slot of drive plate;Through slot is equipped with limiting step part to prevent gripper from falling off.Drive plate is engaged with drive screw rod by screw through hole, and screw rod lower end is with ball head portion and is abutted on support crossbeam, and upper end is equipped with driving handle;Rotary handle forces drive plate to vertically move up.Support crossbeam is additionally provided with guide hole and guide column, and drive plate is constrained to linearly lift.

Description

Technical Field

[0001] This invention belongs to the technical field of key component maintenance tools for rail transit vehicles, specifically relating to a special device for disassembling the sealing cover of the self-sealing bearing in the axle box of urban rail transit vehicles, which is particularly suitable for achieving smooth and non-destructive disassembly of the sealing cover during the major overhaul of the vehicle frame. Background Technology

[0002] During the overhaul of urban rail transit vehicle frames, the inspection of self-sealing bearings is a crucial step in ensuring operational safety. As the core sealing component of the bearing, the sealing cover needs to be removed from the outer ring for subsequent maintenance. Currently, disassembly mainly relies on manual operation using simple tools such as pry bars, which has the following technical drawbacks:

[0003] (1) The sealing cover edge boss fits tightly with the outer ring, and traditional tools cannot provide vertical guiding force. The force applied during disassembly is prone to deviate from the axial direction, resulting in deformation of the sealing cover or scratches on the bearing outer ring / roller assembly, reducing the bearing reuse rate and increasing maintenance costs.

[0004] (2) The hook point on the lower surface of the sealing cover is narrow, making it difficult for general tools to grip accurately; at the same time, it lacks a cooperative positioning structure with the outer ring of the bearing, and the tool is prone to slippage during the disassembly process, affecting the efficiency and safety of operation. Utility Model Content

[0005] The purpose of this application is to provide a self-sealing bearing cover removal device that enables smooth and non-destructive removal of the cover.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A self-sealing bearing seal cover disassembly device includes a support beam, a gripper, a drive plate, and a drive screw. The two ends of the support beam extend downward to form lower support portions, which abut against the upper surface of the outer ring of the bearing.

[0008] The grippers are symmetrically arranged on both sides of the supporting beam. Each gripper includes a hook, a main body, and a limiting part. The hook is located at the lower end of the main body and hooks onto the lower surface of the sealing cover. The limiting part is located at the upper end of the main body.

[0009] The drive plate is positioned above the support beam. The hook of the main body of the gripper can pass downward through the adjustment slot of the drive plate, and the limiting part is located above the drive plate to prevent the main body of the gripper from disengaging downward from the adjustment slot. The main body of the gripper is in clearance fit with the inner wall of the adjustment slot of the drive plate.

[0010] The drive screw is threadedly connected to the threaded through hole of the drive plate, and the lower end of the drive screw abuts against the upper surface of the support beam. Rotating the drive screw can drive the drive plate to move the gripper vertically up and down.

[0011] Furthermore, the inner side of the lower end face of the lower support is provided with an arc-shaped positioning step that matches the outer diameter of the bearing outer ring.

[0012] Furthermore, there is a gap between the inner side of the lower support and the outer peripheral wall of the sealing cover.

[0013] Furthermore, the supporting beam is provided with a guide hole, and a guide post is provided in the guide hole, with the upper end of the guide post mounted on the drive plate.

[0014] Furthermore, the adjusting channel is provided with a limiting step, which is used to prevent the gripper body from disengaging downward from the adjusting channel.

[0015] Furthermore, the lower end of the drive screw is provided with a ball head.

[0016] Furthermore, a drive handle is provided on the upper part of the drive screw.

[0017] The beneficial effects of this application are as follows:

[0018] (1) This application uses the lower support at both ends of the support beam to stably abut against the upper surface of the bearing outer ring to form a rigid reference surface, ensuring that the vertical axial guiding force is always provided during the disassembly process; in addition, combined with the precision helical transmission of the drive screw, the gripper is forced to move in a straight line in the vertical direction, which completely avoids the plastic deformation of the seal cover or the scratches on the bearing outer ring / roller assembly caused by the force deviation of traditional tools, significantly improving the bearing reuse rate and reducing maintenance costs.

[0019] (2) The hook of the gripper of this application can be precisely embedded into the hook point on the lower surface of the sealing cover to achieve micro-gap engagement; moreover, the gap between the limiting part and the drive plate adjustment groove forms a double constraint: it not only restricts the horizontal swing of the gripper, but also prevents the tool from falling off the workpiece by locking the limiting part, thus completely solving the risk of tool slippage during operation and improving disassembly efficiency and personnel safety.

[0020] (3) The mechanical force amplification mechanism of the drive screw in this application provides a continuous and stable axial disassembly force, avoiding secondary damage to the sealing cover by impact load; the symmetrically arranged gripper moves synchronously through the drive plate, so that the sealing cover is subjected to uniform force in the circumference, further preventing deformation caused by local stress concentration. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a self-sealing bearing cover disassembly device provided in an embodiment of this application;

[0022] Figure 2 A schematic diagram of the structure of the self-sealing bearing seal cover disassembly device after separation from the seal cover, according to an embodiment of this application;

[0023] Figure 3 This is a top view of a self-sealing bearing seal cover disassembly device provided in an embodiment of this application;

[0024] Figure 4 for Figure 3 Sectional view at AA;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Support beam; 2. Gripper; 3. Drive plate; 4. Drive screw; 5. Guide column;

[0027] 11. Lower support section; 12. Arc-shaped positioning step; 13. Guide hole;

[0028] 21. Hook; 22. Main body; 23. Limiting part;

[0029] 31. Adjusting through groove; 32. Threaded through hole; 33. Limiting step;

[0030] 41. Ball head; 42. Drive handle; Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," etc., are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In particular, the understanding of the term "upper" following a noun in the claims should be understood as meaning that the entire inner and outer surfaces of the structure referred to by the noun conform to the definition of "upper."

[0033] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structures, features, and effects provided in this application.

[0034] like Figure 2 As shown, the axle box bearings of urban rail transit vehicles mostly adopt self-sealing bearings Q, which include an outer ring Q1 and a sealing cover Q2.

[0035] like Figures 1 to 4 As shown, a self-sealing bearing cover disassembly device includes a support beam 1, a gripper 2, a drive plate 3 and a drive screw 4. The two ends of the support beam 1 extend downward to form lower support parts 11, which abut against the upper surface of the outer ring Q1 of the bearing Q.

[0036] The grippers 2 are symmetrically arranged on both sides of the supporting beam 1. The grippers 2 include a hook 21, a main body 22 and a limiting part 23. The hook 21 is located at the lower end of the main body 22 and hooks onto the lower surface of the sealing cover Q2. The limiting part 23 is located at the upper end of the main body 22.

[0037] The drive plate 3 is positioned above the support beam 1. The hook 21 of the main body 22 of the gripper 2 can pass downward through the adjustment slot 31 of the drive plate 3, and the limiting part 23 is located above the drive plate 3, restricting the main body 22 of the gripper 2 from disengaging downward from the adjustment slot 31. The main body 22 of the gripper 2 is in clearance fit with the inner wall of the adjustment slot 31 of the drive plate 3.

[0038] The drive screw 4 is threadedly connected to the threaded through hole 32 of the drive plate 3, and the lower end of the drive screw 4 abuts against the upper surface of the support beam 1. Rotating the drive screw 4 can drive the drive plate 3 to drive the gripper 2 to perform vertical lifting and lowering movements.

[0039] like Figure 2 As shown in this embodiment, the inner side of the lower end face of the lower support 11 is provided with an arc-shaped positioning step 12 that matches the outer diameter of the bearing outer ring Q1. The arc-shaped positioning step 12 precisely matches the outer diameter of the bearing outer ring, providing automatic centering and stable support, preventing the device from sliding laterally during operation, and ensuring that the disassembly force is strictly vertical.

[0040] In this embodiment, there is a gap between the inner side of the lower support 11 and the outer peripheral wall of the sealing cover. The gap between the inner side of the lower support 11 and the sealing cover provides operating space, avoids interference or scratching between the support and the sealing cover, and ensures that the device can be smoothly installed in place and only contacts the predetermined part (outer ring).

[0041] like Figure 2 As shown, in this embodiment, the supporting beam 1 is provided with a guide hole 13, and a guide post 5 is provided in the guide hole 13. The upper end of the guide post 5 is mounted on the drive plate 3. The guide post 5 and the guide hole 13 provide rigid guidance for the lifting and lowering of the drive plate 3, forcing it to move in a strictly vertical direction, significantly improving the linear accuracy and stability of the movement, and further preventing deflection.

[0042] like Figure 4As shown, in this embodiment, a limiting step 33 is provided on the adjusting channel 31. The limiting step 33 is used to prevent the main body 22 of the gripper 2 from disengaging downward from the adjusting channel 31. The upper limiting step 33 of the adjusting channel 31 cooperates with the limiting part 23 of the gripper 2 to form a reliable anti-disengagement locking structure, which prevents the gripper 2 from accidentally disengaging downward from the drive plate 3 during initial installation or non-operation state, thereby enhancing the reliability of the tool.

[0043] like Figure 4 As shown, in this embodiment, the lower end of the drive screw 4 is provided with a ball head 41. The ball head 41 at the lower end of the drive screw 4 changes the point contact between the screw and the supporting beam 1 into a point-to-surface contact, reducing local pressure and friction, allowing the end of the screw to have a small angle self-adjustment, making the force transmission smoother and protecting the surface of the beam.

[0044] like Figure 4 As shown, in this embodiment, a drive handle 42 is provided on the upper part of the drive screw 4. This makes rotating the screw easier and more controllable, and facilitates the operator in applying disassembly force.

[0045] The working principle of this application is as follows:

[0046] In operation, the arc-shaped positioning steps 12 of the lower support parts 11 at both ends of the support beam 1 are first used to firmly abut against the upper surface of the bearing outer ring, forming a precise positioning reference. The hooks 21 of the symmetrically arranged grippers precisely hook onto the lower edge of the sealing cover, while the upper limiting parts 23 are locked above the drive plate 3. When the operator rotates the handle on the upper part of the drive screw 4, the lower end of the screw cannot move down because it is pressed against the support beam 1. Its engagement with the threaded through hole 32 on the drive plate 3 forces the drive plate 3 to move vertically upward. The drive plate 3 drives the main body 22 of all grippers 2 to rise synchronously and strictly in the vertical direction through the adjusting through groove 31 on it. The hooks 21 of the grippers 2 then evenly transmit the vertical upward pulling force to the circumferential edge of the sealing cover, pulling it out smoothly and straight from the groove of the bearing outer ring, completely avoiding deformation of the sealing cover or damage to the bearing caused by oblique force.

[0047] The embodiments described above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A self-sealing bearing seal cover disassembly device, characterized in that: It includes a support beam, a gripper, a drive plate, and a drive screw. The two ends of the support beam extend downward to form lower support parts, which abut against the upper surface of the outer ring of the bearing. The grippers are symmetrically arranged on both sides of the supporting beam. Each gripper includes a hook, a main body, and a limiting part. The hook is located at the lower end of the main body and hooks onto the lower surface of the sealing cover. The limiting part is located at the upper end of the main body. The drive plate is positioned above the support beam. The hook of the main body of the gripper can pass downward through the adjustment slot of the drive plate, and the limiting part is located above the drive plate to prevent the main body of the gripper from disengaging downward from the adjustment slot. The main body of the gripper is in clearance fit with the inner wall of the adjustment slot of the drive plate. The drive screw is threadedly connected to the threaded through hole of the drive plate, and the lower end of the drive screw abuts against the upper surface of the support beam. Rotating the drive screw can drive the drive plate to move the gripper vertically up and down.

2. The self-sealing bearing seal cover disassembly device according to claim 1, characterized in that: The lower end face of the lower support is provided with an arc-shaped positioning step that matches the outer diameter of the bearing outer ring.

3. A self-sealing bearing seal cover disassembly device according to claim 1 or 2, characterized in that: There is a gap between the inner side of the lower support and the outer peripheral wall of the sealing cover.

4. The self-sealing bearing cover disassembly device according to claim 1, characterized in that: The supporting crossbeam is provided with a guide hole, and a guide post is provided in the guide hole. The upper end of the guide post is mounted on the drive plate.

5. The self-sealing bearing seal cover disassembly device according to claim 1, characterized in that: The adjusting channel is provided with a limiting step, which is used to prevent the gripper body from disengaging downward from the adjusting channel.

6. The self-sealing bearing seal cover disassembly device according to claim 1, characterized in that: The lower end of the drive screw is provided with a ball head.

7. A self-sealing bearing seal cover disassembly device according to claim 1 or 6, characterized in that: A drive handle is provided on the upper part of the drive screw.

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