CN221291125U

CN221291125U - Bearing assembly fixture

Info

Publication number: CN221291125U
Application number: CN202322943587.7U
Authority: CN
Inventors: 王永辉; 应旭成
Original assignee: Shanghai Duofu Zhongyun Aviation Technology Co ltd
Current assignee: Shanghai Duofu Zhongyun Aviation Technology Co ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-07-09
Anticipated expiration: 2033-10-31

Abstract

The utility model relates to a bearing assembly tool which comprises a sleeve, wherein one end of the sleeve is provided with a positioning boss, a plurality of sliding grooves are formed in the positioning boss, a spring is arranged in each sliding groove, a limiting mechanism is slidably arranged in each sliding groove, one end of each spring is abutted to the bottom of each sliding groove, the other end of each spring is abutted to the corresponding limiting mechanism, an inner ring of each bearing is sleeved on the corresponding positioning boss, one end, far away from each spring, of each limiting mechanism is abutted to the inner ring of each bearing, the inner rings of the bearings are in clearance fit with the positioning boss, and friction force generated between each limiting mechanism and the inner rings of the bearings is larger than gravity of the bearings. According to the bearing assembly tool, the positioning boss is in clearance fit with the inner ring of the bearing, so that the inner ring of the bearing and the positioning boss are prevented from being blocked; the bearing is clamped through the sleeve, and the press-fitting efficiency of the bearing is effectively improved.

Description

Bearing assembly fixture

Technical Field

The utility model relates to the technical field of bearing assembly, in particular to a bearing assembly fixture.

Background

Before the use of bearing, need install the bearing on the bearing frame, need utilize bearing sleeve frock to carry out the assembly of bearing and bearing frame in this installation, telescopic anterior segment and the inner circle of bearing take certain cooperation to carry out the centering to the assembly of being convenient for, this kind of form frock is simple, and it is convenient to make, and wide application is realized.

The assembly mode of adopting sleeve frock need rely on sleeve and bearing inner circle's cooperation size to carry out the centering, and sleeve and bearing inner circle cooperation among the prior art adopt transition fit, both can insert the optical axis in the bearing inner circle, can realize being connected of optical axis and bearing inner circle again, because manufacturing error's existence, assemble the dead phenomenon of card appears easily between sleeve frock and the bearing inner circle when not holding, leads to bearing assembly inefficiency between bearing and the sleeve.

Disclosure of utility model

In order to solve the technical problems, the utility model provides a bearing assembly tool which can improve the bearing assembly efficiency.

In order to achieve the above purpose, the utility model provides a bearing assembly fixture, which comprises a sleeve, wherein one end of the sleeve is provided with a positioning boss, a plurality of sliding grooves are formed in the positioning boss, a spring is arranged in each sliding groove, a limiting mechanism is slidably arranged in each sliding groove, one end of each spring is abutted to the bottom of each sliding groove, the other end of each spring is abutted to the corresponding limiting mechanism, an inner ring of each bearing is sleeved on the corresponding positioning boss, one end of each limiting mechanism, which is far away from each spring, is abutted to an inner ring of each bearing, clearance fit is formed between the inner ring of each bearing and the corresponding positioning boss, and friction force generated between each limiting mechanism and the inner ring of each bearing is larger than gravity of each bearing.

In one embodiment of the utility model, the limit mechanism is a limit ball.

In one embodiment of the present utility model, one end of the sleeve extends outwards along the axial direction to form the positioning boss, and the plurality of sliding grooves are arranged in a circular array around the axial line of the positioning boss, and the axial line of the sliding grooves is along the radial direction of the positioning boss.

In one embodiment of the utility model, the force of the spring in each sliding groove against the bearing inner ring is the same.

In one embodiment of the utility model, the positioning boss is provided with a mounting cavity, a positioning column is detachably connected in the mounting cavity, a positioning cavity is arranged in the positioning column, and the positioning cavity forms the sliding groove.

In one embodiment of the utility model, the positioning column comprises a bottom plate and a shell, wherein the bottom plate is detachably connected with the shell, and the positioning cavity is formed between the bottom plate and the shell.

In one embodiment of the utility model, a baffle is arranged at one end of the shell, which is far away from the bottom plate, a through hole is arranged on the baffle, a part of the volume of the limiting ball is abutted on the inner ring of the bearing through the through hole, and the diameter of the limiting ball is larger than that of the through hole.

In one embodiment of the utility model, one end of the sleeve, on which the positioning boss is arranged, is provided with an annular positioning surface perpendicular to the axis of the positioning boss, and the annular positioning surface is in contact with the end surface of the outer ring of the bearing.

In one embodiment of the utility model, the outer diameter of the annular locating surface is smaller than the outer diameter of the outer race of the bearing.

In one embodiment of the utility model, an oil cavity is arranged in the sleeve, an oil hole is arranged on the annular positioning surface, the oil hole is communicated with the oil cavity through a valve, and the oil hole is correspondingly arranged between the inner ring and the outer ring of the bearing.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

According to the bearing assembly tool, the positioning boss is in clearance fit with the inner ring of the bearing, so that the positioning boss can be freely inserted into and pulled out of the inner ring of the bearing, and the phenomenon that the inner ring of the bearing is blocked with the positioning boss is completely avoided; in addition, the clamping of the bearing through the sleeve is realized, namely, the bearing is clamped on the positioning boss by the spring and the limiting mechanism, and the bearing can move along with the movement of the sleeve, so that the press fitting of the bearing outer ring and the bearing seat is performed, and the press fitting efficiency of the bearing is effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a bearing assembly tooling of the present utility model;

FIG. 2 is a cross-sectional view of the bearing assembly tooling of the present utility model;

FIG. 3 is an enlarged partial schematic view at A in FIG. 2;

FIG. 4 is an exploded view of a positioning boss and a positioning post of the bearing assembly tooling of the present utility model;

FIG. 5 is a schematic diagram of an assembly structure of a bearing assembly fixture and a bearing of the present utility model;

fig. 6 is a schematic distribution diagram of a sliding groove of the bearing assembly tool according to the present utility model.

Description of the specification reference numerals:

1. A sleeve; 2. positioning the boss; 3. a sliding groove; 4. a spring; 5. a limiting mechanism; 6. a bearing; 7. a mounting cavity; 8. positioning columns; 9. a positioning cavity; 10. a bottom plate; 11. a housing; 12. a baffle; 13. a through hole; 14. an annular positioning surface; 15. an oil chamber; 16. an oil hole; 17. and (3) a valve.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 6, the bearing assembly fixture of the utility model comprises a sleeve 1, one end of the sleeve 1 is provided with a positioning boss 2, a plurality of sliding grooves 3 are arranged on the positioning boss 2, a spring 4 is arranged in each sliding groove 3, a limiting mechanism 5 is slidably arranged in each sliding groove 3, one end of each spring 4 is abutted to the bottom of each sliding groove 3, the other end of each spring 4 is abutted to the limiting mechanism 5, an inner ring of each bearing 6 is sleeved on the corresponding positioning boss 2, one end, far away from each spring 4, of each limiting mechanism 5 is abutted to an inner ring of each bearing 6, and clearance fit is adopted between the inner ring of each bearing 6 and the corresponding positioning boss 2.

The front end of the sleeve used by the bearing assembly tool in the prior art is an optical axis, transition fit is adopted between the optical axis and the bearing inner ring, the optical axis can be inserted into the bearing inner ring, connection between the optical axis and the bearing inner ring can be realized, the optical axes of the bearing inner ring and the front end of the sleeve are not ideal cylindrical surfaces in manufacturing, so that manufacturing errors exist, the errors can be controlled within a form and position tolerance (cylindricity tolerance) range in actual manufacturing, but due to the existence of actual errors, the phenomenon of locking easily occurs between the bearing and the sleeve when the assembly is not ended between the optical axis of the front end of the sleeve and the bearing inner ring, and the assembly efficiency of the bearing is low. Therefore, the present application proposes a bearing assembly fixture, as shown in fig. 1 and 2, which comprises a sleeve 1, wherein one end of the sleeve 1 is an operation end, a user performs operations such as moving and press fitting on the sleeve 1 through the operation end, and the other end of the sleeve 1 is an end connected with a bearing 6, that is, the end is an end matched with an inner ring of the bearing 6. The sleeve 1 is provided with location boss 2 with bearing 6 matched with one end, realize the installation of the inner circle of sleeve 1 and bearing 6 through this location boss 2, be provided with a plurality of sliding tray 3 on the location boss 2, be provided with spring 4 and stop gear 5 in sliding tray 3, stop gear 5 slidably connects in sliding tray 3, specifically, spring 4 sets up between the bottom of sliding tray 3 and stop gear 5, and spring 4 is the pressure spring, set up precompression volume, therefore the bottom of sliding tray 3 is held up to the one end of spring 4, the other end of spring 4 holds up stop gear 5, and stop gear 5 can slide under the effort of spring 4 in sliding tray 3. Further, as shown in fig. 5, the positioning boss 2 and the inner ring of the bearing 6 are not in transition fit, but in clearance fit, that is, the inner diameter of the inner ring of the bearing 6 is larger than the outer diameter of the positioning boss 2, and the positioning boss 2 can be freely inserted into and pulled out from the inner ring of the bearing 6, so that the phenomenon that the inner ring of the bearing 6 is blocked with the positioning boss 2 when the positioning boss 2 on the sleeve 1 is assembled with the inner ring of the bearing 6 is completely avoided; Furthermore, when the bearing 6 is required to be assembled by using the bearing assembly tool, the inner ring of the bearing 6 is sleeved on the circumferential surface of the positioning boss 2, due to the existence of the spring 4, the limiting mechanism 5 is always abutted against the inner ring of the bearing 6 under the elasticity of the spring 4, and the friction force generated between the limiting mechanism 5 and the inner ring of the bearing 6 is larger than the gravity of the bearing 6, so that the bearing 6 is clamped on the positioning boss 2 by the spring 4 and the limiting mechanism 5, can move along with the movement of the sleeve 1, and further the outer ring of the bearing 6 and the bearing seat are pressed, therefore, the positioning boss 2 on the sleeve 1 can be freely inserted into and pulled out from the inner ring of the bearing 6 by clearance fit, the phenomenon that the positioning boss 2 is blocked with the inner ring of the bearing 6 is prevented. Wherein, the process of the matched installation of the sleeve 1 and the bearing 6 is as follows: the bearings 6 are placed on the respective platforms, the axis of the bearings 6 is placed perpendicular to the platforms, i.e. the end face of the bearings 6 is directed upwards, then the user moves the sleeve 1 by hand or by means of a robot arm, aligns the positioning boss 2 on the sleeve 1 with the inner ring of the bearings 6, then moves the sleeve 1 towards the inner ring of the bearings 6, so that the positioning boss 2 is inserted into the inner ring of the bearings 6, in the process, the positioning boss 2 is first brought into contact with the limiting mechanism 5, then the limiting mechanism 5 is moved in the sliding groove 3 towards the axis direction of the positioning boss 2 under continued movement of the positioning boss 2, the spring 4 is further compressed, The elastic force of the spring 4 enables the limiting mechanism 5 to clamp the inner ring of the bearing 6, the spring 4 is provided with precompression, the acting force between the limiting mechanism 5 and the inner ring of the bearing 6 is equal to the elastic force of the spring 4, the acting force between the limiting mechanism 5 and the inner ring of the bearing 6 enables friction force to be generated between the limiting mechanism 5 and the inner ring of the bearing 6, and the friction force is larger than the gravity of the bearing 6, so that the clamping of the bearing 6 by the sleeve 1 can be realized. The friction force generated between the limiting mechanism 5 and the inner ring of the bearing 6 is proportional to the positive pressure (corresponding to the elastic force generated when the spring 4 is compressed), so that the pre-compression amount of the spring 4 is required, so that the limiting mechanism 5 is sufficient to clamp the bearing 6, so that the bearing 6 can be conveniently moved and pressed.

The sleeve 1 is provided with the positioning boss 2, the positioning boss 2 is provided with the sliding groove 3, the spring 4 and the limiting mechanism 5 are arranged in the sliding groove 3, and the positioning boss 2 and the inner ring of the bearing 6 are in clearance fit, so that the positioning boss 2 can be freely inserted into and pulled out from the inner ring of the bearing 6, and the phenomenon that the inner ring of the bearing 6 and the positioning boss 2 are blocked is completely avoided; in addition, the clamping of the bearing 6 through the sleeve 1 is realized, namely, the bearing 6 is clamped on the positioning boss 2 by the spring 4 and the limiting mechanism 5, and can move along with the movement of the sleeve 1, so that the pressing of the outer ring of the bearing 6 and the bearing seat is performed, and the pressing efficiency of the bearing is effectively improved.

In one embodiment, the limiting mechanism 5 is a limiting ball.

As shown in fig. 3, the limiting mechanism 5 adopts a limiting ball, and the limiting ball is a spherical surface, so that when the inner ring of the bearing 6 is mounted on the positioning boss 2, the limiting ball is in point contact with the inner ring of the bearing 6, and the point contact can realize the positioning function only by touching a local area of the target object (bearing), thereby improving the positioning efficiency. In the process of matching and installing the sleeve 1 and the bearing 6, the limiting ball is not rigidly connected with the spring 4, but is in an abutting state, so that the limiting ball can rotate relative to the end part of the spring 4, friction between the limiting ball and the inner ring of the bearing 6 is reduced, and damage to the inner ring of the bearing 6 is prevented.

In one embodiment, one end of the sleeve 1 extends outwards along the axial direction to form the positioning boss 2, the plurality of sliding grooves 3 are arranged in a circular array around the axial line of the positioning boss 2, and the axial line of the sliding grooves 3 is along the radial direction of the positioning boss 2.

As shown in fig. 6, one end of the sleeve 1 abutting against the bearing 6 extends outwards along the axial direction to form a positioning boss 2, the sliding grooves 3 are arranged in a circular array around the axial line of the positioning boss 2, that is, the angles between two adjacent sliding grooves are the same, the axial direction of the sliding grooves 3 is arranged along the radial direction of the positioning boss 2, and as each sliding groove is internally provided with a spring 4, the springs 4 are uniformly arranged around the positioning boss 2, and therefore the elasticity of each spring 4 is transferred to a corresponding limit ball, and therefore the elasticity of the springs 4 is uniformly applied to the bearing inner ring through the limit balls, so that the clamping of the bearing inner ring through the limit balls is effectively realized.

In one embodiment, the spring 4 in each sliding groove 3 has the same force against the bearing inner ring.

Preferably, the size and shape of each sliding groove on the positioning boss 2 are consistent, the distance between each sliding groove and the axis of the positioning boss 2 is consistent, the specification of the spring 4 in each sliding groove is consistent, and the size of the limiting ball is consistent.

In one embodiment, the positioning boss 2 is provided with an installation cavity 7, a positioning column 8 is detachably connected in the installation cavity 7, a positioning cavity 9 is arranged in the positioning column 8, and the positioning cavity 9 forms the sliding groove 3.

As shown in fig. 4, the positioning boss 2 is provided with an installation cavity 7, a positioning column 8 is installed in the installation cavity 7, the positioning column 8 is detachably connected in the installation cavity 7, a positioning cavity 9 is formed in the positioning column 8 through hollow treatment, the positioning cavity 9 forms a sliding groove 3, namely, the spring 4 and the limiting ball are all installed in the positioning cavity 9, and the positioning column 8, the spring 4 and the limiting ball form a component. Because the positioning column 8 is detachably arranged on the positioning boss 2, when the spring 4 or the limiting ball needs to be replaced, the assembly can be directly replaced, and the maintenance efficiency is improved.

In one embodiment, the positioning column 8 comprises a bottom plate 10 and a housing 11, the bottom plate 10 is detachably connected with the housing 11, and the positioning cavity 9 is formed between the bottom plate 10 and the housing 11.

As shown in fig. 4, the positioning column 8 comprises a bottom plate 10 and a housing 11, the bottom plate 10 and the housing 11 are detachably connected, preferably, the bottom plate 10 and the housing 11 are connected through threads to form a positioning cavity 9, the detachable connection of the bottom plate 10 and the housing 11 is convenient for the installation of the spring 4 and the limiting mechanism 5, and the installation efficiency and the subsequent maintenance efficiency are improved.

In one embodiment, a baffle 12 is disposed at one end of the housing 11 away from the bottom plate 10, a through hole 13 is disposed on the baffle 12, a part of the volume of the limiting ball passes through the through hole 13 and abuts against the inner ring of the bearing 6, and the diameter of the limiting ball is larger than that of the through hole 13.

As shown in fig. 5, the bottom plate 10 is connected with the housing 11 to form the positioning column 8, one end of the housing 11 opposite to the bottom plate 10 is provided with a baffle 12, the middle of the baffle 12 is provided with a through hole 13, the through hole 13 on the baffle 12 is used for penetrating through part of the volume of the limiting ball, so that the limiting ball can be abutted on the inner ring of the bearing 6, meanwhile, the diameter of the through hole 13 is smaller than that of the limiting ball, so that the limiting ball cannot directly penetrate through the through hole 13, and the limiting ball cannot penetrate through the through hole 13 under the elasticity of the spring 4, thereby influencing the assembly of the bearing 6 and the positioning boss 2.

In one embodiment, an annular positioning surface 14 is disposed at one end of the sleeve 1 where the positioning boss 2 is disposed, the annular positioning surface 14 is perpendicular to the axis of the positioning boss 2, and the annular positioning surface 14 contacts with the end surface of the outer ring of the bearing 6.

The sleeve 1 is mainly used for realizing the press fitting of the outer ring of the bearing 6 and the bearing seat, one end of the sleeve 1 provided with the positioning boss 2 is provided with the annular positioning surface 14, as shown in fig. 3, the annular positioning surface 14 is arranged at the outer edge of the positioning boss 2, after the inner ring of the bearing 6 is sleeved on the positioning boss 2, the axis of the inner ring of the bearing 6 is self-centered to the axis of the positioning boss 2 under the action of the spring 4 and the limiting ball, so that the inner ring of the bearing 6 is concentric with the positioning boss 2, and the annular positioning surface 14 is required to be matched with the end surface of the outer ring of the bearing because the end surface of the outer ring of the bearing is required to be pressed by the annular positioning surface 14, so that the annular positioning surface 14 is required to be perpendicular to the axis of the bearing 6, namely, the annular positioning surface 14 is required to be perpendicular to the axis of the positioning boss 2. The specific working principle is as follows: the inner ring of the bearing 6 is mounted on the positioning boss 2 of the sleeve 1, the axis of the inner ring of the bearing 6 is self-centered to the axis of the positioning boss 2 through the spring 4 and the limiting ball on the positioning boss 2, the bearing 6 is clamped through the spring 4 and the limiting ball, then the sleeve 1 is moved, the outer ring of the bearing 6 is aligned with a mounting hole on a bearing seat, the sleeve 1 is pressed through a press-fit tool, the annular positioning surface 14 on the sleeve 1 is tightly attached to the end face of the outer ring of the bearing 6, and under the continuous movement of the sleeve 1, the outer ring of the bearing 6 is press-fitted into the mounting hole on the bearing seat through the annular positioning surface 14.

In one embodiment, the outer diameter of the annular locating surface 14 is smaller than the outer diameter of the outer race of the bearing 6.

If the depth of the mounting hole of the outer race of the bearing 6 on the bearing housing is greater than the width of the bearing 6, it may be necessary to press the bearing 6 directly onto the bottommost portion of the mounting hole on the bearing housing, in which case the annular locating surface 14 will continue to move downwardly through the mounting hole, so that the outer diameter of the annular locating surface 14 is smaller than the outer diameter of the outer race of the bearing 6, so as to avoid interference between the annular locating surface 14 and the inner wall of the mounting hole, which would result in the outer race of the bearing 6 not being able to be mounted in place in the mounting hole.

In one embodiment, an oil cavity 15 is disposed in the sleeve 1, an oil hole 16 is disposed on the annular positioning surface 14, the oil hole 16 is communicated with the oil cavity 15 through a valve 17, and the oil hole 16 is correspondingly disposed between the inner ring and the outer ring of the bearing 6.

Since the bearing 6 is generally coated with the lubricating oil after being mounted on the bearing housing, the oil cavity 15 is provided on the sleeve 1, and the lubricating oil can be injected into the bearing 6 through the sleeve 1 after the bearing 6 is pressed onto the bearing housing. Specifically, the annular positioning surface 14 is matched with and pressed with the outer ring of the bearing 6, so that the position between the inner ring and the outer ring of the bearing 6 exactly corresponds to the position of the annular positioning surface 14, the annular positioning surface 14 is provided with the oil hole 16, the oil cavities 15 are communicated through the oil hole 16, and the oil hole 16 is correspondingly arranged at the position between the inner ring and the outer ring of the bearing 6, as shown in fig. 5; further, the oil hole 16 is communicated with the oil cavity 15 through a valve 17, when the bearing 6 is installed, the corresponding valve 17 is opened (a corresponding control device and a button can be arranged on the sleeve 1, the control device is in communication connection with the valve 17), then lubricating oil in the oil cavity 15 is injected between the inner ring and the outer ring of the bearing 6, and the opening and closing time of the valve 17 and the injection speed of the lubricating oil can be set so as to realize quantitative lubricating oil injection between the inner ring and the outer ring of the bearing 6. The oil holes 16 are provided in plurality and are arranged in a circular array around the axis of the positioning boss 2 to uniformly spread the lubricating oil between the inner ring and the outer ring of the bearing 6.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. The utility model provides a bearing assembly fixture which characterized in that: including sleeve (1), the one end of sleeve (1) is provided with location boss (2), be provided with a plurality of sliding tray (3) on location boss (2), be provided with spring (4) in sliding tray (3), just install stop gear (5) in sliding tray (3) slidable, the one end butt of spring (4) is in the bottom of sliding tray (3), the other end butt of spring (4) is in on stop gear (5), the inner race cover of bearing (6) is established on location boss (2), keep away from on stop gear (5) one end butt of spring (4) is in on the inner race of bearing (6), the inner race of bearing (6) with be clearance fit between location boss (2), the frictional force that produces between the inner race of stop gear (5) with bearing (6) is greater than the gravity of bearing (6).

2. The bearing assembly fixture of claim 1, wherein: the limiting mechanism (5) is a limiting ball.

3. The bearing assembly fixture of claim 1, wherein: one end of the sleeve (1) outwards extends along the axial direction to form the positioning boss (2), a plurality of sliding grooves (3) are arranged in a circular array around the axial line of the positioning boss (2), and the axial line of the sliding grooves (3) is along the radial direction of the positioning boss (2).

4. A bearing assembly fixture according to claim 3, wherein: the forces of the springs (4) in the sliding grooves (3) abutting against the inner ring of the bearing (6) are the same.

5. The bearing assembly fixture of claim 2, wherein: the positioning boss (2) is provided with an installation cavity (7), a positioning column (8) is detachably connected in the installation cavity (7), a positioning cavity (9) is arranged in the positioning column (8), and the positioning cavity (9) forms the sliding groove (3).

6. The bearing assembly fixture of claim 5, wherein: the positioning column (8) comprises a bottom plate (10) and a shell (11), wherein the bottom plate (10) is detachably connected with the shell (11), and a positioning cavity (9) is formed between the bottom plate (10) and the shell (11).

7. The bearing assembly fixture of claim 6, wherein: one end of the shell (11) far away from the bottom plate (10) is provided with a baffle (12), the baffle (12) is provided with a through hole (13), part of the volume of the limiting ball penetrates through the through hole (13) to be abutted on the inner ring of the bearing (6), and the diameter of the limiting ball is larger than that of the through hole (13).

8. The bearing assembly fixture according to any one of claims 1 to 7, wherein: one end of the sleeve (1) provided with a positioning boss (2) is provided with an annular positioning surface (14), the annular positioning surface (14) is perpendicular to the axis of the positioning boss (2), and the annular positioning surface (14) is in contact with the end face of the outer ring of the bearing (6).

9. The bearing assembly fixture of claim 8, wherein: the outer diameter of the annular locating surface (14) is smaller than the outer diameter of the outer ring of the bearing (6).

10. The bearing assembly fixture of claim 9, wherein: an oil cavity (15) is formed in the sleeve (1), an oil hole (16) is formed in the annular locating surface (14), the oil hole (16) is communicated with the oil cavity (15) through a valve (17), and the oil hole (16) is correspondingly formed between the inner ring and the outer ring of the bearing (6).