WO2021035834A1

WO2021035834A1 - Bearing inner ring axial withdrawing and dismounting tool

Info

Publication number: WO2021035834A1
Application number: PCT/CN2019/106346
Authority: WO
Inventors: 邓先平; 杨莺; 王山; 夏红勇; 赵俊程; 欧星灼; 杨下沙; 龙云峰; 熊文浩; 兰万玲
Original assignee: 中车株洲电机有限公司
Priority date: 2019-08-28
Filing date: 2019-09-18
Publication date: 2021-03-04

Abstract

Disclosed is a bearing inner ring axial withdrawing and dismounting tool, comprising: a clamping component (3) for sleeving an outer wall of a bearing inner ring (2) and abutting against an end face of an outer ring flange (201) thereof; and a force application component (4) connected to the clamping component (3) and used for applying a force to the clamping component (3) in the axial direction of a rotary shaft (1) so as to make the bearing inner ring (2) slide on the rotary shaft (1). According to the bearing inner ring axial withdrawing dismounting tool, the clamping component (3) is clamped on the outer wall of the bearing inner ring (2), and the force application component (4) applies the force to the clamping component (3) in the axial direction, such that the bearing inner ring (2) gradually slides on the rotary shaft (1) and finally withdraws from the rotary shaft (1), thereby completing dismounting. Compared with the prior art, the whole dismounting process has the advantages of being simple and easy to implement, comprising concise steps, no special apparatus requirement, a relatively low operation cost, less damage being caused to the rotary shaft (1) or the bearing inner ring (2), no special requirement for a working environment, and having relatively wide adaptability.

Description

Disassembly tool for axial withdrawal of inner ring of bearing

This application requires that it be submitted to the Chinese Patent Office on August 28, 2019, the application number is 201910803219.8, the name of the invention is "a bearing inner ring axial withdrawal disassembly tool", and the same day it is submitted to the Chinese Patent Office, the application number is 201921416604.9, and the name of the invention is The priority of the Chinese patent application for "a tool for the axial withdrawal of the inner ring of a bearing" is incorporated into this application by reference in its entirety.

Technical field

The invention relates to the technical field of bearings, in particular to a disassembly tool for axial withdrawal of the inner ring of a bearing.

Background technique

With the development of the machinery industry, more and more machinery and equipment have been widely used.

In the occasions that mechanically involve rotating motion, it is often necessary to use a rotating shaft and a motor to drive the rotating shaft to rotate at a high speed through the output torque of the motor. The rotating shaft is a kind of rotating part that needs high precision machining, and its own machining accuracy will affect the balance and stability during the rotating movement. On the basis of ensuring the high-precision machining of the rotating shaft, to further improve the balance and stability during the rotating motion of the rotating shaft, it is necessary to rely on the role of bearings and other related accessories.

At present, the rotating shaft is generally equipped with a bearing, and the bearing is installed on the bearing seat. Due to the lubrication and rolling friction characteristics of the bearing, the operating condition of the rotating shaft can be kept stable for a long time. In order to ensure the stability of the installation between the bearing and the rotating shaft and prevent loosening due to factors such as mechanical vibration, the inner ring of the bearing generally forms an interference fit with the outer wall of the rotating shaft, that is, the inner ring of the bearing is firmly fixed to the rotating shaft On the outer wall. When the rotating shaft rotates, it can drive the inner ring of the bearing to rotate relative to its outer ring.

When the shaft has a long service life, regular maintenance and bearing replacement are required. Among them, the outer ring of the bearing and the steel ball are relatively easy to disassemble, but the inner ring of the bearing is matched with the outer wall of the rotating shaft for a long time, and the pre-tightening force is relatively large and it is more difficult to disassemble. In the prior art, commonly used methods for disassembling the inner ring of a bearing include percussion, pushing, and thermal disassembly. Among them, the knocking method is suitable for bearings with small interference, but the bearing may be damaged during the knocking process. The pressing method generally requires the use of a hydraulic press to press-fit the bearing, which requires equipment conditions and high cost. Thermal disassembly methods generally include induction heating, oil heating, flame heating, etc., but the heating temperature is not easy to control. When the temperature exceeds a certain temperature, it may affect the performance of the bearing, and it is not suitable for use in a non-fire environment.

Therefore, how to easily and conveniently disassemble the inner ring of the bearing on the rotating shaft, reduce production costs, reduce the damage to the rotating shaft or the inner ring of the bearing during the disassembly process, and improve the adaptability to the working environment is what those skilled in the art know. Facing technical problems.

Summary of the invention

The purpose of the present invention is to provide a disassembly tool for the axial withdrawal of the inner ring of the bearing, which can simply and conveniently disassemble the inner ring of the bearing on the rotating shaft, reduce production costs, and reduce the damage to the rotating shaft or the inner ring of the bearing during the disassembly process. , Improve the adaptability to the working environment.

In order to solve the above technical problems, the present invention provides a disassembly tool for axial withdrawal of the inner ring of a bearing, which includes:

The clamping part is used to sleeve on the outer wall of the inner ring of the bearing and abut against the end face of the outer ring rib;

The urging member is connected with the clamping member and used for urging the clamping member along the axial direction of the rotating shaft to make the inner ring of the bearing slide on the rotating shaft.

Preferably, the inner wall of the clamping component is provided with a first installation groove for clamping with the ring plate of the bearing inner ring.

Preferably, the first mounting groove is specifically an annular groove with a rectangular cross section.

Preferably, the clamping component includes two semicircular ring tubes that can be detachably enclosed.

Preferably, the outer wall of each semicircular ring tube is provided with mounting holes whose installation positions correspond to each other, so that the two semicircular ring tubes can be tightened and fixed by a fastener.

Preferably, it further includes an intermediate connecting pipe, the rear end inner wall of the intermediate connecting pipe is detachably sleeved on the outer wall of the force applying member, and the front end inner wall of the intermediate connecting pipe is sleeved on the outer wall of the rotating shaft , And the outer wall of the front end of the intermediate connecting pipe is detachably connected with the inner wall of the clamping component.

Preferably, the outer wall of the front end of the intermediate connecting pipe is provided with a boss ring, and the inner wall of the clamping member is also provided with a second installation groove for clamping with the boss ring.

Preferably, it further comprises a backing plate slidably arranged in the front end cavity of the intermediate connecting pipe and used for abutting against the end surface of the rotating shaft under the pushing of the output shaft of the force applying member.

Preferably, the inner wall of the rear end of the intermediate connecting pipe and the outer wall of the force applying member are connected by threads.

Preferably, the force applying component is specifically a pneumatic cylinder, a hydraulic cylinder or a drive motor.

The disassembly tool for axial withdrawal of the inner ring of the bearing provided by the present invention mainly includes a clamping component and a force applying component. Among them, the clamping component is mainly used to sleeve the outer wall of the inner ring of the bearing, and at the same time abut the end surface of the ring plate provided on the outer wall of the inner ring of the bearing, so as to facilitate the abutment of the ring plate by the end surface of the ring plate. And the bearing inner ring exerts force. The force applying part is connected with the clamping part, and is mainly used to apply force to the clamping part along the axial direction of the rotating shaft, so that the clamping part applies force to the ring plate in the axial direction, and finally the force is transmitted to the bearing The inner ring acts as a driving force on the inner ring of the bearing, and the inner ring of the drive bearing slides along the axial direction of the outer wall of the rotating shaft. When the bearing inner ring slides to the end of the rotating shaft, the bearing inner ring can be withdrawn from the rotating shaft and removed. Therefore, the bearing inner ring provided by the present invention is axially withdrawn from the disassembly tool, and clamped on the outer wall of the bearing inner ring through the clamping part, and then the axial force of the clamping part is applied by the force applying part, so that the bearing inner ring gradually Slide on the rotating shaft, and finally withdraw from the rotating shaft to complete the disassembly. Compared with the prior art, the entire disassembly process is simple and easy, the steps are concise, and no special equipment is required, the operation cost is lower, and the damage to the rotating shaft or the inner ring of the bearing is small, and there is no special requirement for the working environment, and the adaptability is better. Strong.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained according to the provided drawings.

FIG. 1 is a schematic diagram of the overall structure of a specific embodiment provided by the present invention.

Fig. 2 is a schematic diagram of a specific structure of the clamping component shown in Fig. 1.

Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 2.

Fig. 4 is a schematic diagram of a specific structure of the intermediate connecting pipe shown in Fig. 1.

Among them, in Figure 1-Figure 4:

Rotating shaft-1, bearing inner ring-2, clamping part-3, force application part-4, fastener-5, intermediate connecting pipe-6, backing plate-7, oil seal ring-8;

Semicircular ring tube—31;

Ring plate—201, first installation groove—301, second installation groove—302, installation hole—311, output shaft—401, boss ring edge—601.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to FIG. 1, which is a schematic diagram of the overall structure of a specific embodiment provided by the present invention.

In a specific embodiment provided by the present invention, the axial withdrawal and disassembly tool for the bearing inner ring mainly includes a clamping component 3 and a force applying component 4.

Among them, the clamping component 3 is mainly used to sleeve on the outer wall of the inner ring 2 of the bearing, and at the same time abut against the end surface of the ring plate 201 provided on the outer wall of the inner ring 2 of the bearing, so as to facilitate the passage of the end surface of the ring plate 201. Then, a force is applied to the ring plate 201 and the inner ring of the bearing. Generally, an oil seal ring 8 is also sleeved on the rotating shaft 1, and the end surface of the clamping member 3 can also abut against the end surface of the oil seal ring 8 at the same time.

The force applying component 4 is connected to the clamping component 3, and is mainly used to apply force to the clamping component 3 along the axial direction of the rotating shaft 1, so that the clamping component 3 applies force to the ring plate 201 in the axial direction, and finally The force is transmitted to the bearing inner ring 2 to act as a driving force on the bearing inner ring 2, and the bearing inner ring 2 is driven to slide on the outer wall of the rotating shaft 1 in its axial direction. When the bearing inner ring 2 slides to the end of the rotating shaft 1, the bearing inner ring 2 can be withdrawn from the rotating shaft 1 and removed.

Therefore, the bearing inner ring provided by this embodiment is axially withdrawn from the disassembly tool, and clamped on the outer wall of the bearing inner ring 2 through the clamping part 3, and then the clamping part 3 is forced by the force applying part 4 in the axial direction. Make the bearing inner ring 2 gradually slide on the rotating shaft 1 and finally withdraw from the rotating shaft 1 to complete the disassembly. Compared with the prior art, the entire disassembly process is simple and easy, the steps are concise, and no special equipment is required, the operating cost is lower, and the damage to the shaft 1 or the inner ring 2 of the bearing is small, and there is no special requirement for the working environment. Strong sex.

As shown in Figs. 2 and 3, Fig. 2 is a schematic diagram of the specific structure of the clamping component 3 shown in Fig. 1, and Fig. 3 is a cross-sectional view of A-A in Fig. 2.

In a preferred embodiment of the clamping component 3, a first installation groove 301 is opened on the inner wall of the clamping component 3. Among them, the first mounting groove 301 is mainly used to form a snap connection with the ring plate 201 of the inner ring 2 of the bearing, so as to form a stable installation and facilitate disassembly. Specifically, the first mounting groove 301 may be an annular groove with a rectangular cross section. The groove width of the first mounting groove 301 may be equivalent to the thickness of the ring plate 201 of the bearing inner ring 2 so that the end faces of the two can be tightly fit when they are clamped. At the same time, the groove depth of the first mounting groove 301 can be slightly larger than the outer diameter of the ring plate 201, so that most of the main body of the ring plate 201 can be fitted into the groove space of the first mounting groove 301 to improve the gap between the two. The connection is stable, and when the clamping member 3 receives the force applied by the urging member 4, the force can be stably transmitted to the bearing inner ring 2 through the engagement between the first mounting groove 301 and the ring plate 201. Of course, the cross-sectional shape of the first mounting groove 301 is not limited to rectangular, and other shapes such as U-shaped or semi-circular are also feasible.

Further, in order to facilitate the clamping between the tool and the workpiece, in this embodiment, the clamping component 3 is specifically a split structure, and mainly includes two semicircular ring tubes 31. Wherein, the two semicircular ring tubes 31 can be circumferentially combined to form a complete clamping component 3, and the two can be detachably connected by fasteners 5. In this way, when clamping the workpiece, one of the semicircular ring tubes 31 can be sleeved on the bearing inner ring 2, and the half of the first mounting groove 301 can be clamped with the half of the ring plate 201, and then the The other semicircular ring tube 31 is sleeved on the bearing inner ring 2, and the other half of the first mounting groove 301 is clamped with the remaining half of the ring plate 201, and finally the two semicircles are connected by the fastener 5. The ring tube 31 is tightened and fixed.

To facilitate disassembly and assembly, in this embodiment, mounting holes 311 are provided on the outer walls of the two semicircular ring tubes 31. Specifically, an extension portion can be provided on the outer wall corresponding to the dividing surface of the two semicircular ring pipes 31 along the radial direction, and then the extension portion is punched, and the holes punched on the two extension portions are aligned with each other to form a complete的Mounting hole 311. Generally, the mounting hole 311 can be a threaded hole or a combination of a half threaded hole and a half smooth hole, and can be stably combined with fasteners 5 (such as bolts and rivets).

In addition, in order to enable the force of the urging member 4 to be stably transmitted to the clamping member 3, an intermediate connecting pipe 6 is added in this embodiment. As shown in FIG. 4, FIG. 4 is a schematic diagram of a specific structure of the intermediate connecting pipe 6 shown in FIG. 1.

The intermediate connecting pipe 6 has a long tubular shape as a whole, and the inner wall of the rear end (right end in the figure) is detachably sleeved on the outer wall of the force applying member 4, and the inner wall of the front end (left end in the figure) is sleeved on the outer wall of the shaft 1 , The outer wall of the front end and the inner wall of the clamping part 3 are detachably connected. In this way, the entire intermediate connecting pipe 6 is located between the urging member 4 and the clamping member 3 and serves as an intermediate transmission chain from the urging member 4 to the clamping member 3. When pressure is applied to the output end of the force applying component 4, its output shaft 401 extends forward and abuts against the end face of the rotating shaft 1, after which the output end of the force applying component 4 continues to apply pressure, and the reaction force from the rotating shaft 1 pushes Bottom, the housing of the force applying component 4, the intermediate connecting pipe 6, the clamping component 3 and the bearing inner ring 2 all move in opposite directions, so that the bearing inner ring 2 is withdrawn from the rotating shaft 1.

In order to improve the connection stability between the intermediate connecting pipe 6 and the clamping part 3, in this embodiment, a boss ring 601 is provided on the outer wall of the front end of the intermediate connecting pipe 6, and at the same time, the inner wall of the clamping part 3 is also provided The second installation slot 302. The second mounting groove 302 is mainly used to form a clamping connection with the boss ring 601 on the intermediate connecting pipe 6 so as to realize a stable connection between the intermediate connecting pipe 6 and the clamping component 3 and stable force transmission. Specifically, the connection structure of the second mounting groove 302 and the boss ring 601 is the same as the connection structure of the first mounting groove 301 and the ring plate 201 described above, and will not be repeated here.

At the same time, in order to facilitate the detachable connection between the intermediate connecting pipe 6 and the forcing member 4, in this embodiment, an external thread is provided on the outer wall of the forcing member 4, and at the same time, an external thread is provided on the inner wall of the rear end of the intermediate connecting tube 6 Internal thread, in this way, the intermediate connecting pipe 6 can be fixed on the force applying member 4 through a threaded connection.

Not only that, considering that the output shaft 401 of the force application member 4 may exert a relatively large force on the front end surface of the rotating shaft 1, in order to reduce the surface friction and surface wear between the two, the present embodiment also connects the front end of the intermediate pipe 6 A backing plate 7 is provided in the inner cavity. Specifically, the flat circular plate of the backing plate 7 has an outer diameter equivalent to the inner diameter of the front end cavity of the intermediate connecting pipe 6, and has a smooth surface, which can slide in the front end cavity of the intermediate connecting pipe 6, mainly When the output shaft 401 of the force applying member 4 starts to apply pressure to the end surface of the rotating shaft 1, it is used as a force receiving member and a protective layer on the end surface of the rotating shaft 1. In addition, the material of the backing plate 7 has certain elasticity, which can effectively reduce the pressure formed by the output shaft 401 of the force applying member 4 on the end surface of the rotating shaft 1 and reduce surface friction and wear.

In a preferred embodiment of the force applying component 4, the force applying component 4 may specifically be a pneumatic cylinder, a hydraulic cylinder, or a drive motor, etc. A jack is used in this embodiment.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this text, but should conform to the widest scope consistent with the principles and novel features disclosed in this text.

Claims

A disassembly tool for axial withdrawal of the inner ring of a bearing, which is characterized in that it comprises:

The clamping part is used to sleeve on the outer wall of the inner ring of the bearing and abut against the end surface of its ring plate;

The urging member is connected with the clamping member and used for urging the clamping member along the axial direction of the rotating shaft to make the inner ring of the bearing slide on the rotating shaft.
The axial withdrawal and disassembly tool for the bearing inner ring according to claim 1, wherein the inner wall of the clamping member is provided with a first mounting groove for clamping with the ring plate of the bearing inner ring.
The tool for dismounting the bearing inner ring axially withdrawing according to claim 2, wherein the first mounting groove is specifically an annular groove with a rectangular cross section.
The disassembly tool for axial withdrawal of the inner ring of the bearing according to claim 3, wherein the clamping component comprises two semicircular ring tubes that can be detachably enclosed.
The axial withdrawal and disassembly tool for bearing inner ring according to claim 4, characterized in that the outer wall of each semicircular ring tube is provided with mounting holes corresponding to each other in mounting positions, so that the two mounting holes can be connected by fasteners. The semicircular ring tube is tightened and fixed.
The axial withdrawal and disassembly tool for the bearing inner ring according to any one of claims 1-5, further comprising an intermediate connecting pipe, and the rear end inner wall of the intermediate connecting pipe is detachably sleeved on the applying force. On the outer wall of the component, the front end inner wall of the intermediate connecting pipe is sleeved on the outer wall of the rotating shaft, and the front end outer wall of the intermediate connecting pipe is detachably connected with the inner wall of the clamping component.
The bearing inner ring axial withdrawal and disassembly tool according to claim 6, wherein the outer wall of the front end of the intermediate connecting pipe is provided with a boss ring, and the inner wall of the clamping part is also provided with The second installation groove that is clamped on the edge of the boss.
The tool for axial withdrawal and disassembly of the bearing inner ring according to claim 7, characterized in that it further comprises a slidable installation in the front end cavity of the intermediate connecting pipe for mounting on the output shaft of the forcing member The backing plate abutting against the end surface of the rotating shaft is pushed down.
The axial withdrawal and disassembly tool for the bearing inner ring according to claim 8, wherein the inner wall of the rear end of the intermediate connecting pipe and the outer wall of the force applying member are connected by threads.
The tool for disassembling the bearing inner ring axially withdrawing according to claim 9, characterized in that the force applying component is specifically a pneumatic cylinder, a hydraulic cylinder or a drive motor.