CN217225364U

CN217225364U - Tool for press mounting of bearing

Info

Publication number: CN217225364U
Application number: CN202123370871.7U
Authority: CN
Inventors: 胡新富; 杨涛
Original assignee: Fujian Yongjing Technology Co Ltd
Current assignee: Fujian Yongjing Technology Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-08-19
Anticipated expiration: 2031-12-29

Abstract

The utility model relates to a tool for press mounting a bearing, which is connected with a main shaft of equipment to be mounted through a shaft sleeve, so that all parts of the tool are connected with the main shaft, and can bear the axial force generated when a jack applies force to press mount the bearing, and the bearing can be quickly, conveniently and effectively mounted; the sliding inner ring and the sliding outer ring are connected into a whole to slide through the bolt, the jack is arranged between the flange front plate and the flange cover plate, the front end piston of the jack is pressed against the end face of the sliding inner ring, and during force application and press mounting operation of the jack, the front end piston of the jack presses the sliding inner ring and drives the bolt and the sliding outer ring to press the bearing, and the bolt and the sliding outer ring slide forwards along the main shaft until the bearing is pressed and mounted in place. Adopt the utility model discloses a frock of pressure equipment bearing can change the bearing fast, conveniently at on-the-spot normal position, greatly shortens the time of salvageing and resumes production as early as possible to furthest reduces the production loss.

Description

Tool for press mounting of bearing

Technical Field

The utility model relates to a frock of pressure equipment bearing belongs to bearing pressure equipment frock technical field.

Background

Today, where industrial technology is highly developed today, the availability and accuracy requirements of bearings in many mechanical assemblies are increasing, for example, in the assembly of reaction converters in chemical plant production systems. The large bearings of the four riding wheels of the reaction converter run continuously due to large load and high ambient temperature, and sudden damage accidents of the bearings occur occasionally, so that the production needs to be restored as soon as possible by timely rush repair equipment.

At present, the maintenance method for dismantling and replacing the riding wheel bearing adopts a heating method: because the space of a production workshop of a chemical plant is limited, the reaction converter needs to be jacked up and separated from the supporting wheel, the supporting wheel component (comprising a bearing and a bearing seat) is hoisted to the nearby open ground by a crane, then the bearing seat, the bearing and the like are dismantled, then a new bearing is installed and the bearing seat is reinstalled by a hot installation method of boiling oil to heat the bearing, and finally the supporting wheel component is hoisted back to the original position by the crane. The method needs to use large-scale machines, so that the first-aid repair cost is high, most time for first-aid repair is wasted on the reciprocating hoisting of the idler wheel component and the oil boiling heating bearing by the crane, the first-aid repair time is more than 12 hours, the production system is stopped for a long time, and the continuous and stable production is influenced. Under the condition of no crane, the idler wheel assembly needs to be manually lifted to the open ground, so that the mounting speed of the bearing after being heated is influenced, the bearing is cooled quickly in the air, and once the bearing is cooled too quickly and clamped on a shaft, the bearing is not mounted in place, so that the heating temperature of the bearing needs to be further increased, the operation violates the regulation that the heating temperature of the bearing cannot exceed 120 ℃, and the precision and the service life of the bearing are seriously influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the tool for press-mounting the bearing is needed to be provided, and the large bearing can be quickly press-mounted in situ on site, so that the aim of recovering production of the rush-repair equipment as soon as possible is fulfilled, and the production loss is reduced to the maximum extent.

In order to achieve the above purpose, the utility model mainly adopts the following technical scheme:

the utility model provides a tool for press mounting of a bearing, which comprises a shaft sleeve, a bolt, a flange front plate, a jack, a flange cover plate and a screw rod;

one end of the shaft sleeve is used for being connected with a main shaft of equipment to be installed, a sliding outer ring is sleeved outside the shaft sleeve and used for abutting against a bearing, and a sliding inner ring is sleeved inside the shaft sleeve; the flange front plate is sleeved at the other end of the shaft sleeve;

a first radial through hole is formed in the sliding outer ring, a second radial through hole is formed in the shaft sleeve, and a third radial through hole is formed in the sliding inner ring; the first radial through hole, the second radial through hole and the third radial through hole are communicated with each other and form a channel for inserting the bolt;

the jack is arranged between the flange front plate and the flange cover plate, and a front-end piston of the jack is pressed against the end face of the sliding inner ring; the flange front plate is connected with the flange cover plate through the screw rod.

The tool principle for pressing the bearing provided by the technical scheme is as follows: the shaft sleeve is connected with the main shaft of the equipment to be installed, so that all parts of the tool are connected with the main shaft, the axial force generated when the bearing is pressed and installed by the jack under the force application can be borne, and the bearing is installed quickly, conveniently and effectively; the sliding inner ring and the sliding outer ring are connected into a whole to slide by arranging the sliding outer ring, the jack is arranged between the flange front plate and the flange cover plate, the front end piston of the jack is pressed against the end face of the sliding inner ring, and when the bearing is pressed and mounted by the jack under the action of force, the front end piston of the jack presses and presses the sliding inner ring and drives the bolt and the sliding outer ring to press and press the bearing, and the sliding inner ring and the sliding outer ring slide forwards along the main shaft until the bearing is pressed and mounted in place. By adopting the structure, the middle of the bearing can be jacked by one jack, the bearing bears more uniform pressure, the bearing can be installed more quickly and better, two jacks with equal height are not needed to be jacked on two sides, and one labor cost is reduced.

In some embodiments, the outer diameter of the bushing is 0.15-0.20mm smaller than the inner diameter of the bearing.

In some embodiments, the inner diameter of the sliding outer ring is 0.15-0.20mm larger than the outer diameter of the sleeve.

In some embodiments, the outer diameter of the sliding inner ring is 0.15-0.20mm smaller than the inner diameter of the sleeve.

In some embodiments, the inner bore of the flange front plate is 0.15-0.20mm larger than the outer diameter of the boss.

In some embodiments, a stepped surface is arranged at one end of the shaft sleeve connected with the flange front plate, and the flange front plate is sleeved on the shaft sleeve, abuts against the stepped surface and is fixed by a first nut.

In some embodiments, a first through hole is formed in the flange front plate, a second through hole is formed in the flange cover plate, and the first through hole and the second through hole are in one-to-one correspondence in radial positions; the screw rod simultaneously penetrates through the first through hole and the second through hole and is fixed by a second nut.

In some embodiments, the number of the first through holes and the number of the second through holes are plural, and the number of the screws is plural. Preferably, the plurality of first through holes are uniformly distributed along the circumferential direction of the flange front plate, and the plurality of second through holes are uniformly distributed along the circumferential direction of the flange cover plate. The uniform distribution means that the distance between two adjacent first through holes is the same, and the distance between two adjacent second through holes is the same.

In some embodiments, the number of the first through holes and the number of the second through holes are three, respectively, and the number of the screws is three. Preferably, the three first through holes are uniformly distributed along the circumferential direction of the flange front plate, and the three second through holes are uniformly distributed along the circumferential direction of the flange cover plate. The uniform distribution means that the distance between two adjacent first through holes is the same, and the distance between two adjacent second through holes is the same. By adopting three first through holes (second through holes) which are uniformly distributed, a triangular structure is formed, so that the jack is stably arranged between the flange front plate and the flange cover plate.

In some embodiments, the jack is a hydraulic split jack.

Different from the prior art, the technical scheme has the following technical effects:

(1) the continuous and stable production of the chemical plant production system device is extremely important, once the bearing of the important large-scale equipment is suddenly damaged, the bearing can be quickly and conveniently replaced in situ on site by adopting the tool for press mounting the bearing, the rush repair time is greatly shortened, and the production is recovered as soon as possible, so the production loss is reduced to the maximum extent;

(2) by adopting the tool for press mounting the bearing, a large crane does not need to be hired, and lubricating oil for boiling the bearing is not needed, so that the rush repair cost is effectively reduced, and the cost is saved;

(3) the tool for press mounting the bearing can be repeatedly used, the process of heating and boiling the bearing by lubricating oil is not needed, waste oil gas, waste oil and the like are avoided, and the environment is protected;

(4) adopt the utility model discloses a frock of pressure equipment bearing can realize with a jack roof pressure in the middle of, and bearing pressure is more even, can be faster, install the bearing better, has both need not two equal altitude jacks at both sides roof pressure, and reduces a labour cost.

The above description of the present invention is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clearly understood by those skilled in the art, the present invention may be further implemented according to the content described in the text and the drawings of the present application, and in order to make the above objects, other objects, features, and advantages of the present application more easily understood, the following description is made in conjunction with the detailed description of the present application and the drawings.

Drawings

The drawings are only for purposes of illustrating the principles, implementations, applications, features, and effects of particular embodiments of the present application, as well as others related thereto, and are not to be construed as limiting the application.

In the drawings of the specification:

fig. 1 is a schematic structural view of a tool for press-fitting a bearing according to an embodiment of the present application; in the drawings, the X-axis represents the axial direction, and the Y-axis represents the radial direction;

FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1;

FIG. 3 is a partial enlarged view of the portion B in FIG. 1;

fig. 4 is a schematic structural diagram of a tool for press-fitting a bearing according to an embodiment of the present application during a press-fitting operation;

in the drawings, the X-axis represents the axial direction, and the Y-axis represents the radial direction;

FIG. 5 is a schematic structural view of a riding wheel with a tool removed after a bearing is pressed in place according to an embodiment of the present disclosure; in the drawings, the X axis represents the axial direction, and the Y axis represents the radial direction.

The reference numerals referred to in the above figures are explained below:

1. a shaft sleeve; a step surface 11;

2. sliding the outer ring;

3. sliding the inner ring;

4. a bolt; 41. a flange;

5. a flange front plate; 51. a first nut;

6. a jack;

7. a flange cover plate;

8. a screw; 81. a second nut;

9. a bearing;

10. a riding wheel; 101. a main shaft.

Detailed Description

In order to explain in detail possible application scenarios, technical principles, practical embodiments, and the like of the present application, the following detailed description is given with reference to the accompanying drawings in conjunction with the listed embodiments. The embodiments described herein are merely for more clearly illustrating the technical solutions of the present application, and therefore, the embodiments are only used as examples, and the scope of the present application is not limited thereby.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.

Unless otherwise defined, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended only to describe particular embodiments and is not intended to limit the present application.

In this application, terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Without further limitation, in this application, the use of "including," "comprising," "provided with," "having," or other similar expressions in phrases and in other instances, is intended to cover a non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or article that includes the recited elements, such that a process, method, or article that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such process, method, or article.

As is understood in the examination of the guidelines, the terms "greater than", "less than", "more than" and the like in this application are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. In addition, in the description of the embodiments of the present application, "a plurality" means two or more (including two), and expressions related to "a plurality" similar thereto are also understood, for example, "a plurality of groups", "a plurality of times", and the like, unless specifically defined otherwise.

In the description of the embodiments of the present application, spatially relative terms such as "central," "interior," "exterior," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like may be used in the description of the embodiments, or the figures, as indicated herein, merely for convenience in describing particular embodiments of the present application or for the understanding of the reader, and without indicating or implying that the device or component so referred to must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present application.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like as used in the description of the embodiments of the present application are to be construed broadly. For example, the connection can be a fixed connection, a detachable connection, or an integrated arrangement; it can be a mechanical connection, an electrical connection, or a communication connection; they may be directly connected or indirectly connected through an intermediate; which may be communication within two elements or an interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application pertains in accordance with specific situations.

Further, it should be noted that for simplicity and clarity of illustration, elements shown in the figures have not necessarily been drawn to scale, and that structures and regions shown in the figures are schematic in nature and, thus, the relative dimensions or spacings shown in the figures are not intended to limit the specific dimensions or spacings of the tooling (or component parts) of the present invention. For example, the dimensions of some of the elements may be exaggerated relative to other elements for clarity. Further, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements.

Referring to fig. 1, the present embodiment provides a tool for press-mounting a bearing, which includes a shaft sleeve 1, a plug 4, a flange front plate 5, a jack 6, a flange cover plate 7, and a screw 8.

Referring to fig. 1 and 4, one end of a shaft sleeve 1 is used for connecting with a main shaft of a device to be installed, a sliding outer ring 2 is sleeved outside the shaft sleeve 1, the sliding outer ring 2 is used for pressing against a bearing 9, and a sliding inner ring 3 is sleeved inside the shaft sleeve 1; the flange front plate 5 is sleeved at the other end of the shaft sleeve 1. In some embodiments, one end of the shaft sleeve 1 may be screwed with a main shaft of the device to be installed, and in particular, one end of the shaft sleeve 1 is provided with an internal thread for screwing with an external thread of the main shaft of the device to be installed.

Referring to fig. 1 and 2, a first radial through hole is formed in the sliding outer ring 2, a second radial through hole is formed in the shaft sleeve 1, and a third radial through hole is formed in the sliding inner ring 3; the first radial through hole, the second radial through hole and the third radial through hole are communicated with each other, and a channel for inserting the plug pin 4 is formed. The jack 6 is arranged between the flange front plate 5 and the flange cover plate 7, and a front end piston of the jack 6 is pressed against the end face of the sliding inner ring 3; the flange front plate 5 and the flange cover plate 7 are connected through a screw 8. It should be noted that the first radial through hole is a through hole formed by two radial holes (corresponding to and communicating with each other in position) of the sliding outer ring 2; the second radial through hole is a through hole formed by two radial holes (the positions of the two radial holes are mutually corresponding and communicated) of the shaft sleeve 1; the third radial through hole is a through hole formed by two radial holes (corresponding to and communicating with each other) of the sliding inner ring 3. The axes of the first radial through hole, the second radial through hole and the third radial through hole are vertically intersected with the axis of the shaft sleeve 1.

Referring to fig. 4 and 5, during the press mounting operation of the tool for press mounting a bearing, one end of the shaft sleeve 1 is in threaded connection with the main shaft 101 of the riding wheel 10, the bearing 9 is sleeved outside the shaft sleeve 1, and the sliding outer ring 2 is pressed against the bearing 9. When the jack 6 is applied with force and pressurized, the piston of the jack 6 presses the sliding inner ring 3, drives the bolt 4 and the sliding outer ring 2 to press the inner ring of the bearing 9, and moves forwards along the main shaft 101 of the riding wheel 10 in a sliding manner until the bearing 9 is pressed in place.

Be different from prior art, above-mentioned technical scheme is connected with the main shaft of waiting to adorn equipment through axle sleeve 1 for all spare parts of frock all link together with the main shaft, can bear the axial force that produces when jack application of force pressure equipment bearing, install the bearing fast, convenient and the effect is better. The inventor is in the design and the debugging the utility model discloses the in-process of frock discovers if adopt the split type jack of equal high hydraulic pressure such as two at both sides roof pressure, can cause the bearing to bear the inhomogeneous and card of pressure and epaxial because of two uneven factors of operating personnel application of force, and the application of force that needs in time to adjust two jacks just can the pressure equipment smoothly, just takes time and a more cost of labor. Therefore, according to the technical scheme, the sliding outer ring 2, the bolt 4 and the sliding inner ring 3 are arranged, so that the sliding inner ring 3 and the sliding outer ring 2 are connected into a whole to slide, the jack 6 is arranged between the flange front plate 5 and the flange cover plate 7, the front end piston of the jack 6 is pressed against the end face of the sliding inner ring 3, when the bearing 9 is pressed and installed by the jack 6 through force application, the front end piston of the jack 6 presses and presses the sliding inner ring 3, the bolt 4 and the sliding outer ring 2 are driven to simultaneously press and press the bearing 9, and the sliding inner ring and the sliding outer ring slide forwards along the main shaft until the bearing is pressed and installed in place. By adopting the structure, the sliding inner ring 3 and the sliding outer ring 2 are connected into a whole to slide through the bolt 4, and the pressure applied by the jack 6 is dispersed to two sides from the middle part, so that the bearing pressure is more uniform, the bearing can be installed more quickly and better, two equal-height jacks are not needed to be pressed on two sides, and the labor cost is reduced.

In some embodiments of the present application, please refer to fig. 2, the upper end of the pin 4 is provided with a flange 41, and the diameter of the flange 41 is larger than the diameter of the first radial through hole (and/or the second radial through hole, and/or the third radial through hole). During assembly, the plug pins 4 penetrate from the first radial through holes of the sliding outer ring 2 into the second radial through holes of the shaft sleeve 1 and the third radial through holes of the sliding inner ring 3, and are limited by the flange 41 to prevent the plug pins 4 from falling out of the through holes. The latch 4 and the flange 41 are of integral construction and may be formed as a single piece, for example by injection moulding or by hot melt moulding.

In some embodiments of the present application, the outer diameter of the sleeve 1 is 0.15-0.20mm smaller than the inner diameter of the bearing 9. The bearing 9 can be positioned and guided by setting the outer diameter of the sleeve 1 to be smaller (0.15-0.20mm) than the inner diameter of the bearing 9.

In some embodiments of the present application, the inner diameter of the sliding outer ring 2 is 0.15-0.20mm larger than the outer diameter of the sleeve 1. The inner diameter of the sliding outer ring 2 is set to be larger than the outer diameter of the shaft sleeve 1 by a little (0.15-0.20mm), so that the sliding outer ring 2 can be positioned and guided.

In some embodiments of the present application, the outer diameter of the sliding inner ring 3 is 0.15-0.20mm smaller than the inner diameter of the sleeve 1. The outer diameter of the sliding inner ring 3 is set to be smaller than the inner diameter of the shaft sleeve 1 by 0.15-0.20mm, so that the sliding inner ring 3 can be positioned and guided.

In some embodiments of the present application, the inner bore of the flange front plate 5 is 0.15-0.20mm larger than the outer diameter of the sleeve 1. The flange front plate 5 can be positioned by setting the inner hole of the flange front plate 5 to be slightly larger (0.15-0.20mm) than the outer diameter of the sleeve 1.

In some embodiments of the present application, please refer to fig. 1 and fig. 3, a step surface 11 is disposed at an end of the shaft sleeve 1 connected to the flange front plate 5, and the flange front plate 5 is sleeved on the shaft sleeve 1 and abuts against the step surface 11 and is fixed by a first nut 51. Through setting up step face 11 and first nut 51, can fix flange front bezel 5 on axle sleeve 1 to through mutually supporting with flange apron 7, can guarantee that the jack 6 application of force between the two is more even.

In some embodiments of the present application, a first through hole is formed in the flange front plate 5, a second through hole is formed in the flange cover plate 7, and the first through hole and the second through hole are in one-to-one correspondence in radial positions; the screw 8 simultaneously passes through the first through hole and the second through hole and is fixed by a second nut 81.

In some embodiments of the present application, the number of the first through holes and the number of the second through holes are plural, and the number of the screws 8 is plural. Preferably, the plurality of first through holes are uniformly distributed along the circumferential direction of the flange front plate 5, and the plurality of second through holes are uniformly distributed along the circumferential direction of the flange cover plate 7. The uniform distribution means that the distance between two adjacent first through holes is the same, and the distance between two adjacent second through holes is the same.

In some embodiments of the present application, the number of the first through holes and the number of the second through holes are three, respectively, and the number of the screws 8 is three. Preferably, the three first through holes are uniformly distributed along the circumferential direction of the flange front plate 5, and the three second through holes are uniformly distributed along the circumferential direction of the flange cover plate 7. The uniform distribution means that the distance between two adjacent first through holes is the same, and the distance between two adjacent second through holes is the same. Through adopting three evenly distributed's first through-hole (second through-hole), form the triangle-shaped structure, can set up jack 6 steadily between flange front bezel 5 and flange apron 7, and then guarantee that jack 6 application of force between the two is more even.

In some embodiments of the present application, the jack 6 is a hydraulic split jack.

In some embodiments of the present application, screw 8 is an M36 double-ended screw.

Referring to fig. 1 to 5, the method for using the tool for press-fitting a bearing according to the embodiment includes the following steps:

first, the end of the shaft sleeve 1 provided with the internal screw is connected with the end of the riding wheel main shaft 101 provided with the external screw by screw thread, and the bearing 9 is loosely sleeved on the outer ring of the shaft sleeve 1. Then, the sliding outer ring 2 is sleeved on the outer ring of the shaft sleeve 1 and is abutted against the inner ring of the bearing 9, the sliding inner ring 3 is arranged in the shaft sleeve 1, and then the plug pin 4 is simultaneously inserted into the first radial through hole of the sliding outer ring 2, the second radial through hole of the shaft sleeve 1 and the third radial through hole of the sliding inner ring 3, so that the sliding inner ring 3 and the sliding outer ring 2 are connected into a whole to slide. Then, the flange front plate 5 is sleeved on the outer ring of the shaft sleeve 1 to the step surface 11, and is screwed and fixed by the first nut 51, and then the front end piston of the jack 6 is pressed against the end surface of the sliding inner ring 3, and the rear end of the jack 6 is pressed against the flange cover plate 7. Then, the screw 8 is passed through the second through hole of the flange cover plate 7 and the first through hole of the flange front plate 5, and is tightened with a second nut to fix the jack 6. Finally, the jack 6 is pressurized by applying force, the piston of the jack 6 then presses the sliding inner ring 3, and drives the bolt 4 and the sliding outer ring 2 to press the inner ring of the bearing 9, and the bolt and the sliding outer ring slide forward along the main shaft 101 (the direction indicated by the arrow X in fig. 4) of the riding wheel 10 until the bearing 9 is pressed in place (as shown in fig. 5, the position of the bearing 9 is the bearing position). After the bearing 9 is pressed in place, all parts of the tool can be detached together only by screwing the shaft sleeve 1 off the main shaft 101 of the riding wheel 10, and the tool is simple and convenient. Fig. 5 is a schematic structural view of the riding wheel 10 after the tool is removed.

Be different from prior art, the utility model provides a frock of pressure equipment bearing has following technological effect:

It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the protection scope of the present invention.

Claims

1. A tool for press mounting of a bearing is characterized by comprising a shaft sleeve, a bolt, a flange front plate, a jack, a flange cover plate and a screw rod;

a first radial through hole is formed in the sliding outer ring, a second radial through hole is formed in the shaft sleeve, and a third radial through hole is formed in the sliding inner ring; the first radial through hole, the second radial through hole and the third radial through hole are communicated with each other, and a channel for inserting the plug pin is formed;

the jack is arranged between the flange front plate and the flange cover plate, and a front-end piston of the jack is pressed against the end face of the sliding inner ring; the flange front plate and the flange cover plate are connected through the screw.

2. A tool for press fitting a bearing as claimed in claim 1, wherein the outer diameter of said sleeve is 0.15-0.20mm smaller than the inner diameter of said bearing.

3. A tool for press mounting a bearing according to claim 1, wherein the inner diameter of the sliding outer ring is 0.15-0.20mm larger than the outer diameter of the shaft sleeve.

4. A tool for press mounting a bearing according to claim 1, wherein the outer diameter of said sliding inner ring is smaller than the inner diameter of said sleeve by 0.15-0.20 mm.

5. A tool for press mounting of bearings according to claim 1, wherein the inner hole of the flange front plate is 0.15-0.20mm larger than the outer diameter of the shaft sleeve.

6. A tool for press mounting of a bearing according to claim 1, wherein a stepped surface is provided at an end of the shaft sleeve connected to the flange front plate, and the flange front plate is sleeved on the shaft sleeve and abutted against the stepped surface and fixed by a first nut.

7. A tool for press mounting of bearings according to claim 1, wherein the flange front plate is provided with first through holes, the flange cover plate is provided with second through holes, and the first through holes and the second through holes are in one-to-one correspondence in radial positions; the screw rod simultaneously penetrates through the first through hole and the second through hole and is fixed by a second nut.

8. A tool for a press-fitting of a bearing according to claim 7, wherein the number of said first through holes and said second through holes is plural, and the number of said screw rods is plural.

9. A tool for a press-fitting of a bearing according to claim 8, wherein the number of the first through holes and the number of the second through holes are three, respectively, and the number of the screws is three.

10. A tool for press mounting of bearings according to claim 1, wherein the jack is a hydraulic split jack.