A dismounting tool for motor bearing

Abstract

This utility model belongs to the field of motor bearing technology, and in particular to a disassembly fixture for motor bearings. It includes a support ring sleeve with three fixed rods threaded to its side wall for radial positioning of the bearing via the bearing outer ring. A limiting ring plate is fixedly connected to the side wall of the support ring sleeve to restrict axial separation between the bearing outer ring and the bearing. Three stroke rods are detachably connected to one side of the limiting ring plate via a connecting assembly. Guide sleeves are fitted on the outer sides of each of the three stroke rods to axially guide the support ring sleeve. Using the support ring sleeve, fixed rods, and limiting ring plate as a synchronous positioning mechanism for the bearing's internal structure and outer ring, the regular outer surface of the bearing outer ring can limit the bearing as a whole. Combined with the lateral guidance of the stroke rods and guide sleeves, the lateral movement of the bearing can be maintained during disassembly, preventing the bearing from jamming on the tapered spindle due to center displacement.

Description

Technical Field

[0001] This utility model belongs to the field of motor bearing technology, specifically relating to a disassembly fixture for motor bearings. Background Technology

[0002] The internal tapered roller bearing is mounted on a spindle with a tapered surface. During disassembly, high-pressure hydraulic oil is injected into the hydraulic oil hole on the spindle, and the pressure of the hydraulic oil is used to push the internal tapered roller bearing out to a smaller part of the spindle diameter.

[0003] As the internal tapered roller bearing moves laterally along the main shaft, the clearance between the inner bore of the internal tapered roller bearing and the main shaft gradually increases. During the lateral movement, the internal tapered roller bearing has room to tilt and shift. In the existing technology, when disassembling the internal tapered roller bearing, the outer ring of the bearing is first removed, and then hydraulic oil is used to push the bearing out for disassembly. When the internal tapered roller bearing moves at high speed under the action of inertia, there is a possibility that it will jam with the main shaft. This not only increases the difficulty of disassembling the bearing for the workers, but also causes damage to both the bearing and the main shaft when they collide. Utility Model Content

[0004] This invention provides a disassembly fixture for motor bearings that can maintain the lateral movement of the bearing during disassembly.

[0005] This utility model provides the following technical solution: a disassembly fixture for motor bearings, comprising:

[0006] The support ring sleeve has three fixing rods threaded to its side wall for radial positioning of the bearing via the outer ring of the bearing.

[0007] A limiting ring plate is fixedly connected to the side wall of the support ring sleeve to limit the axial separation of the bearing outer ring and the bearing;

[0008] Three travel rods are detachably connected to one side of the limiting ring plate via a connecting assembly. Guide sleeves are fitted on the outer sides of the three travel rods to axially guide the support ring sleeve.

[0009] The inner wall of the support ring is detachably connected to a brass liner, and the fixing rod extends inward through the brass liner.

[0010] The inner wall of the guide sleeve is filled with an internal spring, the length of which is less than the length of the guide sleeve.

[0011] A damping washer is fixedly connected to the inner wall of the guide sleeve, and the damping washer is sleeved on the outer wall of the stroke rod.

[0012] The connecting assembly includes three extension connecting rods, three threaded connecting rods, and three threaded connecting sleeves. The three extension connecting rods are all fixedly connected to the outer wall of the support ring sleeve. The three threaded connecting rods are respectively fixedly connected to the three extension connecting rods. The three threaded connecting sleeves are respectively threadedly connected to the three threaded connecting rods. The three threaded connecting sleeves are respectively threadedly connected to the three stroke rods.

[0013] Among them, one end of each of the three guide sleeves is fixedly connected to a "U"-shaped frame, and the bottom end of the "U"-shaped frame is fixedly connected to a connecting plate.

[0014] The bottom end of the "U"-shaped frame is detachably connected to a support plate.

[0015] The beneficial effects of this utility model are: using the support ring sleeve, the fixing rod and the limiting ring plate as the synchronous positioning mechanism of the bearing internal structure and the bearing outer ring, the bearing can be limited by the regular outer surface of the bearing outer ring. With the lateral guidance of the stroke rod and the guide sleeve, the bearing can maintain lateral movement during disassembly, avoiding the bearing center offset from being stuck on the tapered spindle or the bearing from colliding and being damaged by the spindle.

[0016] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the stroke rod of this utility model;

[0019] Figure 3 This is a schematic diagram showing the separation state of the support ring and the brass liner in this utility model;

[0020] Figure 4 This is a schematic diagram showing the disassembled state of the support ring sleeve in this utility model.

[0021] In the diagram: 1. Support ring sleeve; 11. Fixing rod; 12. Limiting ring plate; 13. Brass liner; 2. Stroke rod; 21. Guide sleeve; 22. Built-in spring; 23. Damping washer; 3. Connecting assembly; 31. Extension connecting rod; 32. Threaded connecting rod; 33. Threaded connecting sleeve; 4. "U" shaped frame; 41. Connecting plate; 42. Support plate. Detailed Implementation

[0022] Please see Figures 1-4 This utility model provides the following technical solution: a disassembly fixture for motor bearings, comprising:

[0023] Support ring sleeve 1, the side wall of support ring sleeve 1 is threaded with three fixing rods 11, which are used to radially position the bearing through the outer ring of the bearing;

[0024] The limiting ring plate 12 is fixedly connected to the side wall of the support ring sleeve 1 to limit the axial separation of the bearing outer ring and the bearing.

[0025] Three travel rods 2 are detachably connected to one side of the limiting ring plate 12 via the connecting assembly 3. Guide sleeves 21 are fitted on the outer side of each of the three travel rods 2 to axially guide the support ring sleeve 1.

[0026] In this implementation scheme: Before disassembling the bearing, the bearing is placed on the operating plane by a bracket, eliminating the operation of first removing the outer ring of the bearing from the internal structure of the bearing in the prior art. The support plate 42 is placed on the same placement plane as the bearing. Then, the support ring sleeve 1 is sleeved on the outside of the outer ring of the bearing. The outer ring of the bearing and the side of the bearing are in contact with the inner wall of the brass liner 13. Then, the fixing rod 11 is rotated to lock the outer ring of the bearing. Then, the connecting plate 41 is sleeved on the outside of the bearing and fixed on the support plate 42. The central axis of the support ring sleeve 1 and the central axis of the bearing are both horizontal. The bearing and the support plate 42 are both placed horizontally on the same plane.

[0027] When the bearing is ejected by hydraulic oil, the hydraulic oil applies a lateral force to the bearing, pushing it towards the end of the main shaft with a smaller diameter. The bearing is subjected to a lateral force, which is applied to the limiting ring plate 12. The limiting ring plate 12 pulls the support ring sleeve 1 to move synchronously, and with the help of the friction between the fixing rod 11 and the outer ring of the bearing, the outer ring of the bearing is pulled to move synchronously, so that the outer ring of the bearing and the internal structure of the bearing move synchronously. During the process, the support ring sleeve 1 and the fixing rod 11 maintain support for the outer ring of the bearing, and thus support the internal structure of the bearing, so that the internal structure of the bearing always moves along the lateral trajectory of the stroke rod 2 and the guide sleeve 21, and will not shift under external force. This avoids the bearing center shift causing the bearing to jam on the tapered main shaft, or the bearing to collide with and be damaged by the main shaft.

[0028] A rubber gasket is provided at the end of the fixing rod 11 to prevent the high-hardness material from contacting the bearing outer ring and causing scratches. Multiple support ring sleeves 1 are provided to correspond to bearing outer rings of various specifications. Bearings within the same range can use support ring sleeves 1 of the same size. Small-range adjustments can be made only by fixing rod 11. The length of the extension connecting rod 31 on the outside of different support ring sleeves 1 varies accordingly. The larger the diameter of the support ring sleeve 1, the shorter the length of the extension connecting rod 31. The threaded connecting rod 32 is always aligned with the threaded connecting sleeve 33. The three extension connecting rods 31 are evenly distributed on the upper half of the support ring sleeve 1. The included angle between the two extension connecting rods 31 on both sides is less than 180 degrees, so that the stroke rod 2 can be sleeved on the outside of the spindle from top to bottom, making operation more convenient.

[0029] The inner wall of the support ring sleeve 1 is detachably connected to a brass liner 13, and the fixing rod 11 extends inward through the brass liner 13. By setting the brass liner 13, the internal structure of the bearing and the outer ring of the bearing can be protected. The brass liner 13 is made of brass, which is soft and can avoid damage to the bearing and the outer ring of the bearing caused by high hardness.

[0030] The inner wall of the guide sleeve 21 is filled with an internal spring 22, the length of which is less than the length of the guide sleeve 21. The internal spring 22 can relieve the bearing. When the bearing moves at high speed under the action of high pressure hydraulic oil, the stroke rod 2 will retract into the guide sleeve 21. At the initial distance, the stroke rod 2 does not contact the internal spring 22 and the resistance is small. After contacting the internal spring 22, it is elastically limited by the internal spring 22, preventing the bearing from sliding a long distance.

[0031] A damping washer 23 is fixedly connected to the inner wall of the guide sleeve 21, and the damping washer 23 is sleeved on the outer wall of the stroke rod 2. During the process of the built-in spring 22 being compressed and rebounding to reset, the damping washer 23 can consume the elastic potential energy of the built-in spring 22 and the kinetic energy of the bearing. When the stroke rod 2 resets and slides to the empty distance inside the guide sleeve 21, it will not continue to slide under inertia, thus preventing the bearing from getting stuck again at the larger diameter spindle. After the bearing is stabilized, personnel can easily remove the bearing.

[0032] The connecting assembly 3 includes three extension connecting rods 31, three threaded connecting rods 32, and three threaded connecting sleeves 33. The three extension connecting rods 31 are all fixedly connected to the outer wall of the support ring sleeve 1. The three threaded connecting rods 32 are respectively fixedly connected to the three extension connecting rods 31. The three threaded connecting sleeves 33 are respectively threadedly connected to the three threaded connecting rods 32. The three threaded connecting sleeves 33 are respectively threadedly connected to the three stroke rods 2. The extension connecting rods 31, threaded connecting rods 32, and threaded connecting sleeves 33 serve as a connecting structure. When installing the stroke rods 2 and the support ring sleeve 1, the threaded connecting rods 32 and threaded connecting sleeves 33 are aligned, and then the threaded connecting sleeves 33 are rotated to thread onto the corresponding threaded connecting rods 32.

[0033] Three guide sleeves 21 are fixedly connected to a U-shaped frame 4 at one end, and a connecting plate 41 is fixedly connected to the bottom end of the U-shaped frame 4. The U-shaped structure of the U-shaped frame 4 can be more easily fitted onto the outside of the bearing, and the connecting plate 41 can facilitate the connection between the U-shaped frame 4 and the support plate 42.

[0034] The bottom of the “U”-shaped frame 4 is detachably connected to a support plate 42; the support plate 42 serves as a reference support plane to provide horizontal support for the device.

[0035] The working principle and usage process of this utility model are as follows: The bearing is placed on the operating plane via a bracket, eliminating the need for the existing technique of first removing the outer ring of the bearing from its internal structure. The support plate 42 is placed on the same plane as the bearing. Then, the support ring 1 is fitted over the outer ring of the bearing, with the outer ring and the side of the bearing fitting against the inner wall of the brass liner 13. The fixing rod 11 is then rotated to lock the outer ring. Next, the connecting plate 41 is fitted over the outer side of the bearing and fixed to the support plate 42. When the bearing is pushed out by hydraulic oil, the hydraulic oil applies a lateral force to the bearing. The bearing is pushed out towards the end with a smaller diameter of the main shaft. The bearing is subjected to a lateral force, which is applied to the limiting ring plate 12. The limiting ring plate 12 pulls the supporting ring sleeve 1 to move synchronously, and with the help of the friction between the fixing rod 11 and the outer ring of the bearing, the outer ring of the bearing is pulled to move synchronously, so that the outer ring of the bearing and the internal structure of the bearing move synchronously. During the process, the supporting ring sleeve 1 and the fixing rod 11 maintain support for the outer ring of the bearing, and thus support the internal structure of the bearing, so that the internal structure of the bearing always moves along the lateral trajectory of the stroke rod 2 and the guide sleeve 21, and will not deviate under external force.

Claims

1. A disassembly fixture for motor bearings, characterized in that, include: Support ring sleeve (1), the side wall of the support ring sleeve (1) is threaded with three fixing rods (11) for radial positioning of the bearing through the outer ring of the bearing; A limiting ring plate (12) is fixedly connected to the side wall of the support ring sleeve (1) to limit the axial separation of the bearing outer ring and the bearing; The limiting ring plate (12) has three stroke rods (2) detachably connected to one side via a connecting component (3). Each of the three stroke rods (2) is fitted with a guide sleeve (21) to axially guide the support ring sleeve (1).

2. The disassembly fixture for a motor bearing according to claim 1, characterized in that: The inner wall of the support ring (1) is detachably connected to a brass liner (13), and the fixing rod (11) extends inward through the brass liner (13).

3. The disassembly fixture for a motor bearing according to claim 1, characterized in that: The inner wall of the guide sleeve (21) is filled with a built-in spring (22), the length of which is less than the length of the guide sleeve (21).

4. The disassembly fixture for a motor bearing according to claim 1, characterized in that: A damping washer (23) is fixedly connected to the inner wall of the guide sleeve (21), and the damping washer (23) is sleeved on the outer wall of the stroke rod (2).

5. The disassembly fixture for a motor bearing according to claim 1, characterized in that: The connecting assembly (3) includes three extension connecting rods (31), three threaded connecting rods (32), and three threaded connecting sleeves (33). The three extension connecting rods (31) are all fixedly connected to the outer wall of the support ring sleeve (1). The three threaded connecting rods (32) are fixedly connected to the three extension connecting rods (31) respectively. The three threaded connecting sleeves (33) are threadedly connected to the three threaded connecting rods (32) respectively. The three threaded connecting sleeves (33) are threadedly connected to the three stroke rods (2) respectively.

6. The disassembly fixture for a motor bearing according to claim 1, characterized in that: One end of each of the three guide sleeves (21) is fixedly connected to a "U"-shaped frame (4), and the bottom end of the "U"-shaped frame (4) is fixedly connected to a connecting plate (41).

7. The disassembly fixture for a motor bearing according to claim 6, characterized in that: The bottom end of the "U"-shaped frame (4) is detachably connected to a support plate (42).

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