Bearing puller and bearing drawing method

Abstract

The invention relates to a bearing puller and a bearing drawing method. The bearing puller comprises a hydraulic cylinder, the connecting disc comprises a connecting body, cantilevers, supporting legs and mounting holes, the connecting body is in a disc shape, the mounting holes are formed in the connecting body, the hydraulic cylinder is fixed to the connecting body through the mounting holes, the cantilevers extend outwards in the radial direction from the outer edge of the bottom of the connecting body, and the supporting legs extend downwards from the outer edge of the bottom of the connecting body; the bottoms of the pull claws inwards form a force application boss, and the force application boss is suitable for being clamped with a force application groove of a bearing to be drawn; the pressure plate comprises a pressure plate body, a limiting step and an annular cylindrical surface; the vibration generator is fixed on the bottom surface of the pressure plate body; and the damping pull rod is arranged between the connecting disc and the pressing disc. According to the bearing puller and the bearing drawing method, a bearing inner ring can be conveniently pulled out, the operation difficulty is reduced, and safety and reliability are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine assembly, and in particular to a bearing puller and a bearing pulling method. Background Art

[0002] In order to ensure the installation accuracy, the bearings at the rotor of the aircraft engine generally adopt interference fit, and the inner ring of the bearing is heated or the rotor shaft is cooled to realize the assembly of the inner ring of the bearing. However, when the inner ring of the bearing needs to be disassembled, especially after the engine test run is completed, the disassembly force of the inner ring of the bearing is huge and it is difficult to pull out.

[0003] The existing technology generally uses a screw transmission to drive the claw to pull out the bearing. However, this method requires a lot of manpower and is difficult to operate. In addition, the claw will be greatly deformed during the force application process. When the inner ring of the bearing is pulled out, the deformation is instantly restored, which can easily cause the inner ring of the bearing to pop out and cause damage. Summary of the invention

[0004] In view of the above problems in the prior art, the present invention proposes a bearing puller and a bearing pulling method, which are convenient for pulling out the inner ring of the bearing, reduce the difficulty of operation, and are safe and reliable.

[0005] Specifically, the present invention provides a bearing puller, comprising:

[0006] Hydraulic cylinder;

[0007] A connecting plate, comprising a connecting body, a cantilever, a support leg and a mounting hole, wherein the connecting body is in a disc shape and has the mounting hole formed thereon, the hydraulic cylinder is fixed to the connecting body through the mounting hole, a plurality of the cantilever arms are radially extended outward from the bottom outer edge of the connecting body, and a plurality of the support legs are downwardly extended from the bottom outer edge of the connecting body;

[0008] A plurality of claws, the top of each claw is provided with an assembly hole, the assembly hole is fixed with the cantilever, the bottom of each claw is inwardly formed with a force-applying boss, the force-applying boss is suitable for engaging with the force-applying groove of the bearing to be pulled, and the plurality of claws are enclosed by the connecting plate;

[0009] A pressure plate, comprising a pressure plate body, a limiting step and an annular cylinder, wherein the limiting step is formed on the top of the pressure plate body and is fixed in a shape matched with the bottom of the support foot, and the annular cylinder extending downward is formed at the bottom of the pressure plate body, and the bottom of the annular cylinder is matched with the inner surface of the rotor on which the bearing is assembled;

[0010] A vibration generator is fixed on the bottom surface of the pressure plate body;

[0011] The damping pull rod is arranged between the connecting plate and the pressure plate, one end of which is connected and fixed to the connecting plate, and the other end of which is connected and fixed to the pressure plate.

[0012] According to one embodiment of the present invention, an internal thread is formed on the edge of the mounting hole of the connecting body, the bottom of the hydraulic cylinder is fixedly matched with the mounting hole thread, and the piston rod of the hydraulic cylinder extends into the mounting hole and fits against the top surface of the pressure plate.

[0013] According to one embodiment of the present invention, the cross section of the cantilever is rectangular, the assembly hole of the pull claw cooperates with the cantilever, and the pull claw is suitable for moving along the radial direction of the connecting disk for assembly.

[0014] According to one embodiment of the present invention, the bearing puller further comprises a limiting ring, the bottom outer edge of the pulling claw forms a limiting arc surface, the limiting ring is suitable for being sleeved outside the plurality of pulling claws, the limiting ring is fixedly cooperated with the limiting arc surface to limit the radial and axial movement of the pulling claw.

[0015] According to one embodiment of the present invention, a first connecting hole is provided on the connecting body, a second connecting hole is provided on the pressure plate body, the top end of the damping rod is fixed to the first connecting hole by a first screw, and the bottom end of the damping rod is fixed to the second connecting hole by a second screw.

[0016] According to one embodiment of the present invention, three damping rods are provided between the connecting body and the pressure plate body, and the length direction of the damping rods is consistent with the pulling direction of the bearing puller.

[0017] According to an embodiment of the present invention, the three top ends of the three damping rods are equidistant from each other, and the centers of the three top ends are located on the axis of the connecting body.

[0018] According to an embodiment of the present invention, a third connecting hole is provided on the pressure plate body, and the vibration generator is fixed to the third connecting hole by threaded cooperation with a third screw.

[0019] According to one embodiment of the present invention, the bearing puller further includes an elastic washer, and the vibration generator is fixed to the bottom surface of the pressure plate body through a third screw and the elastic washer.

[0020] The present invention also provides a bearing pulling method, which is applicable to the aforementioned bearing pulling tool, wherein the inner ring of the bearing is interference-fitted on the rotor, and a force-applying groove is provided on the upper periphery of the inner ring of the bearing. The bearing pulling method comprises the steps of:

[0021] S1, fix the vibration generator to the pressure plate, the connecting plate is connected to the pressure plate through the damping pull rod, the connecting plate and the pressure plate are pressed against each other, the damping pull rod is shortened, and the support foot is in contact with the limiting step;

[0022] S2, placing the pressure plate into the rotor so that the annular cylindrical surface is fitted and fixed to the inner wall of the rotor;

[0023] S3, installing a plurality of the pulling claws, wherein the pulling claws are matched with the cantilever through the assembly holes and are slid into the connection disk along the radial direction, so that the force-applying bosses of the pulling claws are engaged and fixed with the force-applying grooves;

[0024] S4, fixing the hydraulic cylinder to the connecting plate through the mounting hole of the connecting body, so that the piston rod of the hydraulic cylinder passes downward through the mounting hole and abuts against the top surface of the pressure plate;

[0025] S5, starting the vibration generator, the hydraulic cylinder continues to apply pressure, the inner ring of the bearing is gradually pulled out, and the damping rod is gradually lengthened;

[0026] S6, at the moment when the inner ring of the bearing is separated from the rotor, the damping rod applies a damping effect to prevent the inner ring of the bearing from popping out;

[0027] S7, completing the disassembly of the bearing inner ring and unloading the bearing puller.

[0028] The present invention provides a bearing puller and a bearing pulling method, which are convenient for pulling out the inner ring of the bearing on the rotor, reduce the difficulty of operation and are safe and reliable.

[0029] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as described. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and together with the description serve to explain the principle of the present invention.

[0031] In the attached figure:

[0032] Figure 1 The figure shows an assembly diagram of a bearing puller according to an embodiment of the present invention.

[0033] Figure 2 The figure shows the use state of a bearing puller according to one embodiment of the present invention.

[0034] Figure 3 yes Figure 2 Schematic diagram of the structure of the bearing inner ring and rotor.

[0035] Figure 4A A schematic structural diagram of a connecting plate of a bearing puller according to an embodiment of the present invention is shown.

[0036] Figure 4BA partial cross-sectional view of a connection plate of a bearing puller according to an embodiment of the present invention is shown.

[0037] Figure 5 A schematic structural diagram of a pulling claw of a bearing puller according to another embodiment of the present invention is shown.

[0038] Fig. 6A A schematic diagram showing the structure of a pressure plate of a bearing puller according to an embodiment of the present invention Figure 1 .

[0039] Figure 6B A schematic diagram showing the structure of a pressure plate of a bearing puller according to an embodiment of the present invention Figure 2 .

[0040] Figure 7 A flowchart of a bearing drawing method according to another embodiment of the present invention is shown. The above-mentioned figure includes the following figure numbers:

[0041] Bearing puller 100

[0042] Hydraulic Cylinder 101

[0043] Connection plate 102

[0044] Pull claw 103

[0045] Pressure plate 104

[0046] Vibration generator 105

[0047] Damping rod 106

[0048] Connecting body 107

[0049] Cantilever 108

[0050] Leg 109

[0051] Mounting holes 110

[0052] Mounting hole 111

[0053] Force boss 112

[0054] Pressure plate body 113

[0055] Limiting step 114

[0056] Annular cylinder 115

[0057] Limiting ring 116

[0058] First connecting hole 117

[0059] The second connecting hole 118

[0060] First screw 119

[0061] The second screw 120

[0062] The third connection hole 121

[0063] The third screw 122

[0064] Elastic washer 123

[0065] Limiting arc surface 124

[0066] Bearing inner ring 201

[0067] Rotor 202

[0068] Force groove 203 DETAILED DESCRIPTION

[0069] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0070] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually merely illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0071] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0072] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0073] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0074] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0075] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0076] Figure 1 The figure shows an assembly diagram of a bearing puller according to an embodiment of the present invention. Figure 2 The figure shows the use state of a bearing puller according to one embodiment of the present invention. Figure 3 yes Figure 2 As shown in the figure, a bearing puller 100 mainly includes a hydraulic cylinder 101, a connecting plate 102, a plurality of claws 103, a pressure plate 104, a vibration generator 105 and a damping rod 106. Figure 2 and Figure 3 The assembly of the bearing inner ring 201 is mainly achieved by heating the bearing inner ring 201 or cooling the rotor 202. A force application groove 203 is provided on the bearing inner ring 201. The bearing puller 100 provided by the present invention is mainly used to be assembled to the rotor 202 and the bearing inner ring 201, and its purpose is to pull the bearing inner ring 201 away from the rotor 202.

[0077] Figure 4A A schematic structural diagram of a connecting plate of a bearing puller according to an embodiment of the present invention is shown. Figure 4B A partial cross-sectional view of a connection plate of a bearing puller according to an embodiment of the present invention is shown. Figure 1 As shown, the connection plate 102 includes a connection body 107, a cantilever 108, a support leg 109 and a mounting hole 110. The connection body 107 is in the shape of a disk, and the mounting hole 110 is formed thereon. The hydraulic cylinder 101 is fixed to the connection body 107 through the mounting hole 110. A plurality of cantilever arms 108 extend radially outward from the bottom outer edge of the connection body 107, and a plurality of support legs 109 extend downward from the bottom outer edge of the connection body 107.

[0078] Figure 5 The schematic diagram of the structure of the claw of the bearing puller according to another embodiment of the present invention is shown. As shown in the figure, the top of the claw 103 is provided with an assembly hole 111, and the assembly hole 111 is fixed with the cantilever 108. The bottom of the claw 103 is formed with a force-applying boss 112 inwardly, and the force-applying boss 112 is suitable for engaging with the force-applying groove 203 of the inner ring 201 of the bearing to be pulled. The multiple claws 103 are enclosed in the connecting plate 102.

[0079] Fig. 6A A schematic diagram showing the structure of a pressure plate of a bearing puller according to an embodiment of the present invention Figure 1 . Figure 6B A schematic diagram showing the structure of a pressure plate of a bearing puller according to an embodiment of the present invention Figure 2 As shown in the figure, the pressure plate 104 includes a pressure plate body 113, a limiting step 114 and an annular cylinder 115. The limiting step 114 is formed on the top of the pressure plate body 113, and is fixed with the bottom shape of the support leg 109 of the connecting plate 102 to form radial and axial limiting of the pressure plate 104. The bottom of the pressure plate body 113 is formed with an annular cylinder 115 extending downward, and the bottom of the annular cylinder 115 is matched with the inner surface of the rotor 202 assembled with the bearing inner ring 201.

[0080] The vibration generator 105 is fixed to the bottom surface of the pressure plate body 113. The function of the vibration generator 105 is to apply vibration energy to cause the inner ring 201 of the bearing and the rotor 202 to loosen.

[0081] The damping rod 106 is disposed between the connecting plate 102 and the pressure plate 104. One end of the damping rod 106 is connected and fixed to the connecting plate 102, and the other end is connected and fixed to the pressure plate 104.

[0082] The present invention provides a bearing puller 100, which uses a hydraulic cylinder 101 to replace manual pulling. The pulling force generated by the hydraulic cylinder 101 is transmitted to the pulling claw 103 through the connecting plate 102. The vibration generator 105 applies vibration energy to loosen the inner ring 201 of the bearing and the rotor 202. In this way, the inner ring 201 of the bearing can be pulled out with only a relatively small force. In addition, the damping rod 106 forms a safety protection to prevent the inner ring 201 of the bearing from popping out due to deformation recovery at the moment of pulling out, thereby avoiding harm to the operator.

[0083] Preferably, an inner thread is formed at the edge of the mounting hole 110 of the connecting body 107 , the bottom of the hydraulic cylinder 101 is threadedly fitted and fixed to the mounting hole 110 , and the piston rod of the hydraulic cylinder 101 extends into the mounting hole 110 and fits against the top surface of the pressure plate 104 .

[0084] Preferably, reference Figure 4A and Figure 4B The cross section of the cantilever 108 is rectangular. The assembly hole 111 of the claw 103 cooperates with the cantilever 108, and the claw 103 is suitable for moving along the radial direction of the connecting plate 102, which is equivalent to sliding toward the center along the cantilever 108. Multiple claws 103 correspond to multiple cantilever 108 one by one, and multiple claws 103 gather toward the center to complete the assembly of the claw 103.

[0085] Preferably, reference Figure 1 , Figure 2 and Figure 5 The bearing puller 100 further includes a limit ring 116. The outer edge of the bottom of the claw 103 forms a limit arc surface 124, and the limit ring 116 is suitable for being sleeved outside the multiple claws 103. When the multiple claws 103 are assembled in place, the limit ring 116 is inserted from above, and the limit ring 116 is fixed in shape with the limit arc surface 124 of the claw 103 to limit the radial and axial movement of the claw 103. The force-applying boss 112 of the claw 103 is firmly engaged with the force-applying groove 203.

[0086] Preferably, reference Figure 1 , Figure 4A , Figure 4B , Fig. 6A and Figure 6B A first connection hole 117 is provided on the connection body 107, and a second connection hole 118 is provided on the pressure plate body 113. The top end of the damping rod 106 is threadedly fixed to the first connection hole 117 by a first screw 119, and the bottom end of the damping rod 106 is threadedly fixed to the second connection hole 118 by a second screw 120.

[0087] Preferably, three damping rods 106 are provided between the connecting body 107 and the pressure plate body 113, and the length direction of the damping rods 106 is consistent with the pulling direction of the bearing puller 100. More preferably, the three top ends of the three damping rods 106 are at equal distances from each other, and the centers of the three top ends are located on the axis of the connecting body 107. This structure enables the damping rods 106 to apply a balanced damping force to prevent accidents from occurring when the inner ring 201 of the bearing is pulled out.

[0088] Preferably, a third connecting hole 121 is provided on the pressure plate body 113 , and the vibration generator 105 is fixed by threaded cooperation with the third connecting hole 121 through a third screw 122 .

[0089] Preferably, the bearing puller 100 further includes an elastic washer 123. The vibration generator 105 is fixed to the bottom surface of the pressure plate body 113 through the third screw 122 and the elastic washer 123. The purpose of providing the elastic washer 123 is to strengthen the fastening effect of the third screw 122 and prevent the third screw 122 from loosening.

[0090] The present invention also provides a bearing pulling method, which is applicable to the aforementioned bearing pulling tool 100. Conventionally, the bearing inner ring 201 is interference-fitted on the rotor 202, and a force-applying groove 203 is provided on the upper periphery of the bearing inner ring 201. The bearing pulling method comprises the following steps:

[0091] S1, fix the vibration generator 105 to the pressure plate 104, connect the connecting plate 102 to the pressure plate 104 through the damping rod 106, make the connecting plate 102 and the pressure plate 104 press against each other, shorten the damping rod 106, make the support foot 109 contact and cooperate with the limiting step 114. When the piston rod of the hydraulic cylinder 101 is against the pressure plate 104, the pressure plate 104 is limited axially and radially to keep the connecting plate 102 and the pressure plate 104 aligned.

[0092] S2, placing the pressure plate 104 into the rotor 202 so that the annular cylindrical surface 115 is fitted and fixed to the inner wall of the rotor 202.

[0093] S3, multiple claws 103 are installed from the side, and the claws 103 cooperate with the cantilever 108 through the assembly hole 111, and slide in along the radial direction of the connecting plate 102, so that the force-applying bosses 112 of the multiple claws 103 are engaged and fixed with the force-applying grooves 203. The limiting ring 116 is inserted from the top to limit the radial and axial movement of the claws 103, so that the force-applying bosses 112 of the multiple claws 103 are firmly engaged with the force-applying grooves 203.

[0094] S4, fix the hydraulic cylinder 101 to the connecting plate 102 through the mounting hole 110 of the connecting body 107, so that the piston rod of the hydraulic cylinder 101 passes downward through the mounting hole 110 and abuts against the top surface of the pressure plate 104.

[0095] S5, start the vibration generator 105, the hydraulic cylinder 101 continues to apply pressure, the bearing inner ring 201 is gradually pulled out, and the damping rod 106 is gradually lengthened. Since the entire pulling out process is slow, the damping rod 106 does not generate additional resistance.

[0096] S6, at the moment when the inner ring 201 of the bearing is separated from the rotor 202, the damping rod 106 applies a damping effect to prevent the inner ring 201 of the bearing from popping out;

[0097] S7, completing the disassembly of the bearing inner ring 201 and unloading the bearing puller 100.

[0098] The bearing puller and bearing pulling method provided by the present invention have the following advantages:

[0099] 1. Use a hydraulic cylinder to pull out the claws, and set a vibration generator at the pressure plate to vibrate the inner ring of the bearing to reduce the sticking of the inner ring of the bearing during the extraction process and reduce the extraction force.

[0100] 2. A damping rod is set between the pressure plate and the connecting plate. During the withdrawal process of the bearing inner ring, the damping rod is slowly pulled out with a small pulling force, which will not increase the withdrawal force. However, at the moment the bearing inner ring is pulled out, the damping rod plays a damping role to avoid the instantaneous release of pulling force, which may cause the connecting plate and the bearing inner ring to pop out.

[0101] It will be apparent to those skilled in the art that various modifications and variations may be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A bearing puller, comprising: Hydraulic cylinder; A connecting plate, comprising a connecting body, a cantilever, a support leg and a mounting hole, wherein the connecting body is in a disc shape and has the mounting hole formed thereon, the hydraulic cylinder is fixed to the connecting body through the mounting hole, a plurality of the cantilever arms are radially extended outward from the bottom outer edge of the connecting body, and a plurality of the support legs are downwardly extended from the bottom outer edge of the connecting body; A plurality of claws, the top of each claw is provided with an assembly hole, the assembly hole is fixed with the cantilever, the bottom of each claw is inwardly formed with a force-applying boss, the force-applying boss is suitable for engaging with the force-applying groove of the bearing to be pulled, and the plurality of claws are enclosed by the connecting plate; A pressure plate, comprising a pressure plate body, a limiting step and an annular cylinder, wherein the limiting step is formed on the top of the pressure plate body and is fixed in a shape matched with the bottom of the support foot, and the annular cylinder extending downward is formed at the bottom of the pressure plate body, and the bottom of the annular cylinder is matched with the inner surface of the rotor on which the bearing is assembled; A vibration generator is fixed on the bottom surface of the pressure plate body; The damping pull rod is arranged between the connecting plate and the pressure plate, one end of which is connected and fixed to the connecting plate, and the other end of which is connected and fixed to the pressure plate.

2. The bearing puller according to claim 1, characterized in that: An internal thread is formed on the edge of the mounting hole of the connecting body, the bottom of the hydraulic cylinder is fixedly matched with the thread of the mounting hole, and the piston rod of the hydraulic cylinder extends into the mounting hole and fits the top surface of the pressure plate.

3. The bearing puller according to claim 1, characterized in that: The cross section of the cantilever is rectangular, the assembly hole of the pull claw cooperates with the cantilever, and the pull claw is suitable for moving along the radial direction of the connecting disk for assembly.

4. The bearing puller according to claim 1, characterized in that: It also includes a limiting ring, the bottom outer edge of the pulling claw forms a limiting arc surface, the limiting ring is suitable for being sleeved outside the multiple pieces of the pulling claws, and the limiting ring is fixed with the limiting arc surface to limit the radial and axial movement of the pulling claw.

5. The bearing puller according to claim 1, characterized in that: The connecting body is provided with a first connecting hole, the pressure plate body is provided with a second connecting hole, the top end of the damping rod is fixed with the first connecting hole by a first screw, and the bottom end of the damping rod is fixed with the second connecting hole by a second screw.

6. The bearing puller according to claim 5, characterized in that: Three damping rods are arranged between the connecting body and the pressure plate body, and the length direction of the damping rods is consistent with the pulling direction of the bearing puller.

7. The bearing puller according to claim 6, characterized in that: The three top ends of the three damping rods are at equal distances from each other, and the centers of the three top ends are located on the axis of the connecting body.

8. The bearing puller according to claim 1, characterized in that: The pressure plate body is provided with a third connecting hole, and the vibration generator is fixed with the third connecting hole through threaded cooperation of a third screw.

9. The bearing puller according to claim 8, characterized in that: It also includes an elastic washer, and the vibration generator is fixed to the bottom surface of the pressure plate body through a third screw and the elastic washer.

10. A bearing pulling method, applicable to the bearing pulling tool as claimed in claim 1, wherein the inner ring of the bearing is interference fitted on the rotor, and a force application groove is provided on the upper periphery of the inner ring of the bearing, characterized in that: The bearing drawing method comprises the steps of: S1, fix the vibration generator to the pressure plate, the connecting plate is connected to the pressure plate through the damping pull rod, the connecting plate and the pressure plate are pressed against each other, the damping pull rod is shortened, and the support foot is in contact with the limiting step; S2, placing the pressure plate into the interior of the rotor so that the annular cylindrical surface is fitted and fixed to the inner wall of the rotor to form a centering relationship between the two; S3, installing a plurality of the pulling claws, wherein the pulling claws are matched with the cantilever through the assembly holes and are slid into the connection disk along the radial direction, so that the force-applying bosses of the pulling claws are engaged and fixed with the force-applying grooves; S4, fixing the hydraulic cylinder to the connecting plate through the mounting hole of the connecting body, so that the piston rod of the hydraulic cylinder passes downward through the mounting hole and abuts against the top surface of the pressure plate; S5, starting the vibration generator, the hydraulic cylinder continues to apply pressure, the inner ring of the bearing is gradually pulled out, and the damping rod is gradually lengthened; S6, at the moment when the inner ring of the bearing is separated from the rotor, the damping rod applies a damping effect to prevent the inner ring of the bearing from popping out; S7, completing the disassembly of the bearing inner ring and unloading the bearing puller.

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