Bearing dismounting tool

Abstract

The utility model relates to the technical field of dismounting tools, in particular to a bearing dismounting tool which is characterized in that a first chuck is provided with a first extension arm and a second extension arm which are symmetrically arranged at an included angle; the inner sides of the first extension arm and the second extension arm are configured to be clamped into a bearing shoulder gap, and the outer sides of the first extension arm and the second extension arm are respectively provided with a second convex edge for clamping a puller clamping jaw; a third extension arm clamped into a gap of a bearing retaining shoulder is arranged on one side of the movable chuck assembly; the two ends of the third extension arm are slidably connected with the ends of the first extension arm and the second extension arm in the symmetry axis direction of the first extension arm and the second extension arm, and the included angles among the three extension arms are always equal. The first extension arm, the second extension arm and the third extension arm are clamped into a gap of a bearing retaining shoulder to be matched with a puller to disassemble a bearing; and the included angles among the three extension arms are equal, so that the bearing is stressed uniformly. In addition, through sliding connection of the third extension arm and the second extension arm, the bearing dismounting device can adapt to dismounting of bearings of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembly tooling, and particularly relates to a bearing disassembly tooling. Background Art

[0002] In the machinery industry, a puller is generally used to disassemble bearings. To ensure the reliable operation of the puller, it is necessary to ensure the strength of the puller. Generally, an arc-shaped structure is designed at the clamping jaws of the puller. To compress the space of the mechanical structure, the axial dimension of the bearing shoulder is often compressed. After the axial dimension of the bearing shoulder is compressed, it is very easy to cause the arc-shaped structure at the clamping jaws of the puller to be difficult to be inserted into the gap of the bearing shoulder to pull out the bearing. Content of the Utility Model

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defect that after the axial dimension of the existing bearing shoulder is compressed, the arc-shaped structure at the clamping jaws of the puller is difficult to be inserted into the gap of the bearing shoulder, and it is very difficult to pull out the bearing.

[0004] To solve the above problems, the utility model provides an improved bearing disassembly tooling, including:

[0005] A first chuck, provided with a first extension arm and a second extension arm which are integrally formed and symmetrically arranged at an angle with each other; the inner shapes of the first extension arm and the second extension arm are configured to be adapted to be inserted into the shoulder gap of the bearing, and second convex edges for the clamping jaws of the puller to be inserted are provided on the outer sides of both of them;

[0006] A movable chuck assembly, provided with a third extension arm on one side which is adapted to be inserted into the shoulder gap of the bearing; the two ends of the third extension arm are adapted to be slidably connected to the ends of the first extension arm and the second extension arm along the symmetry axis direction of the first extension arm and the second extension arm, and the included angles between the three extension arms are always equal.

[0007] Optionally, the movable chuck assembly is further provided with two parallel fourth extension arms; the two fourth extension arms are located at both ends of the third extension arm and are integrally formed with the third extension arm; strip-shaped holes extending along the length direction are provided on the two fourth extension arms; chutes with shapes adapted to the bottom shapes of the two fourth extension arms are provided at the positions of the ends of the first extension arm and the second extension arm corresponding to the strip-shaped holes for sliding fit; the movable chuck assembly is detachably connected to the first chuck through fasteners penetrating the strip-shaped holes.

[0008] Optionally, convex edges extending along the respective length directions are provided on the inner sides of the first extension arm, the second extension arm and the movable chuck assembly; the thickness of each convex edge gradually becomes thinner and smoothly transitions in the direction close to the shoulder gap of the bearing.

[0009] Optionally, the second convex edges on the outer sides of the first extension arm and the second extension arm are arranged to run through the length direction of the two.

[0010] Optionally, the movable chuck assembly includes a second chuck; the second chuck is detachably connected to the third extension arm; a third protrusion is provided on the side of the second chuck facing the bearing, and the third protrusion is suitable for snapping into the shoulder gap of the bearing; a clearance groove is provided on the side of the second chuck away from the bearing for the puller jaw to snap into the outside of the third extension arm.

[0011] Optionally, a first groove is provided in the middle of the top surface of the third extension arm;

[0012] The bottom surface of the slide groove is a fourth plane, the bottom surface of the first groove is a fifth plane, and the fourth plane is coplanar with the fifth plane;

[0013] The bottom surface of the first chuck is a sixth plane, the bottom surface of the second chuck is a seventh plane, and the sixth plane is coplanar with the seventh plane.

[0014] Optionally, the third extension arm and the fourth extension arm together constitute a movable frame; at least two spaced first bosses are provided on the top surface of the second chuck; a second groove matching with the first boss on the second chuck is provided on the bottom surface of the movable frame; the second chuck is positioned by matching the first boss with the second groove.

[0015] Optionally, a second boss is provided at a position corresponding to the first groove in the middle of the bottom surface of the third extension arm;

[0016] An eleventh plane is formed on the side of the second boss away from the extension direction of the fourth extension arm; a ninth plane is formed on the outer side of the first chuck close to the top surface, and a tenth plane is formed on the outer side of the first chuck close to the bottom surface; the ninth plane is separated from the tenth plane by a first distance in the horizontal direction; a twelfth plane is formed on the bottom surface of the give way groove; the eleventh plane is separated from the twelfth plane by a second distance in the horizontal direction; the first distance is the same as the second distance.

[0017] Optionally, the edge of the second protruding edge forms an eighth plane, and the sixth plane is a third distance away from the eighth plane in the vertical direction;

[0018] The bottom surface of the second boss forms a thirteenth plane, and the seventh plane is vertically spaced a fourth distance from the thirteenth plane;

[0019] The third distance is the same as the fourth distance.

[0020] Optionally, a first convex edge is provided inside the first chuck, and a first plane and a second plane are respectively formed at the edges of the two first convex edges corresponding to the first extension arm and the second extension arm; a third plane is formed at the edge of the third convex edge.

[0021] The first plane and the ninth plane are horizontally separated by a fifth distance, and the third plane and the eleventh plane are horizontally separated by a sixth distance; the fifth distance is the same as the sixth distance.

[0022] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0023] 1. In the technical solution of the present application, the first extension arm, the second extension arm and the third extension arm are clamped into the gap of the bearing shoulder, and in cooperation with the puller, the bearing is disassembled. The tooling is light, the installation is fast, and the tooling structure is simple; during the disassembly process, by setting the angles between the three extension arms to be always equal, the force on the bearing is made uniform. In addition, by the sliding connection between the third extension arm and the second extension arm, it can be adjusted to adapt to the disassembly of bearings of different sizes.

[0024] 2. In the technical solution of the present application, the fastener passes through the strip-shaped hole and is detachably connected to the first chuck. When pulling the bearing in cooperation with the puller, the force application direction of the puller is the same as the force application direction of the connection of the fastener, and the connection of the screw is more firm.

[0025] 3. In the technical solution of the present application, by setting the thickness of each convex edge to gradually become thinner and smoothly transition in the direction close to the gap of the bearing shoulder, when disassembling the bearing, the bearing disassembly tooling can match the gaps of various bearing shoulders.

[0026] 4. In the technical solution of the present application, the second convex edge on the outer sides of the first extension arm and the second extension arm is arranged through the length direction of the two, so that when disassembling bearings of different sizes, the jaws of the puller can be clamped into the second convex edge.

[0027] 5. In the technical solution of the present application, by providing a relief groove on the side of the second chuck facing away from the bearing, it is convenient for the jaws of the puller to be clamped into the outside of the third extension arm, improving the efficiency of disassembling the bearing.

[0028] 6. In the technical solution of the present application, by setting the fourth plane and the fifth plane to be coplanar, and the sixth plane and the seventh plane to be coplanar, it is ensured that the center of the set screw of the puller is located at the center of the bearing to be disassembled, and the jaws of the puller are evenly clamped on the bearing disassembly tooling.

[0029] 7. In the technical solution of the present application, the first convex platform cooperates with the second groove to accurately and reliably position the moving frame and the second chuck, ensuring the reliable operation of the bearing disassembly tooling.

[0030] 8. The technical solution of this application ensures that the center of the set screw of the puller is located at the center of the bearing to be disassembled by setting the first distance equal to the second distance, and the jaws of the puller are evenly clamped on the bearing disassembly tooling.

[0031] 9. The technical solution of this application ensures that the center of the set screw of the puller is located at the center of the bearing to be disassembled by setting the third distance equal to the fourth distance, and the jaws of the puller are evenly clamped on the bearing disassembly tooling.

[0032] 10. The technical solution of this application ensures that the center of the set screw of the puller is located at the center of the bearing to be disassembled by setting the fifth distance equal to the sixth distance, and the jaws of the puller are evenly clamped on the bearing disassembly tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 Schematic perspective view of the first chuck provided in the embodiment of the present invention Figure 1 ;

[0035] Figure 2 Schematic perspective view of the first chuck provided in the embodiment of the present invention Figure 2 ;

[0036] Figure 3 Schematic perspective view of the first chuck provided in the embodiment of the present invention Figure 3 ;

[0037] Figure 4 Schematic perspective view of the first chuck provided in the embodiment of the present invention Figure 4 ;

[0038] Figure 5 Schematic perspective view of the second chuck provided in the embodiment of the present invention Figure 1 ;

[0039] Figure 6 Schematic perspective view of the second chuck provided in the embodiment of the present invention Figure 2 ;

[0040] Figure 7 Schematic perspective view of the second chuck provided in the embodiment of the present invention Figure 3 ;

[0041] Figure 8 Schematic perspective structure of the second chuck provided in the embodiment of the present utility model Figure 4 ;

[0042] Figure 9 Schematic perspective structure of the moving frame provided in the embodiment of the present utility model Figure 1 ;

[0043] Figure 10 Schematic perspective structure of the moving frame provided in the embodiment of the present utility model Figure 2 ;

[0044] Figure 11 Schematic perspective structure of the moving frame provided in the embodiment of the present utility model Figure 3 ;

[0045] Figure 12 Schematic perspective structure of the moving frame provided in the embodiment of the present utility model Figure 4 ;

[0046] Figure 13 Front view structure schematic diagram of the bearing dismounting tooling in the first dismounting state provided in the embodiment of the present utility model;

[0047] Figure 14 is Figure 13 cross-sectional structure schematic diagram of;

[0048] Figure 15 Schematic perspective structure of the bearing dismounting tooling in the first dismounting state provided in the embodiment of the present utility model;

[0049] Figure 16 Front view structure schematic diagram of the bearing dismounting tooling in the second dismounting state provided in the embodiment of the present utility model;

[0050] Figure 17 is Figure 16 cross-sectional structure schematic diagram of;

[0051] Figure 18 Schematic perspective structure of the bearing dismounting tooling in the second dismounting state provided in the embodiment of the present utility model.

[0052] Explanation of reference numerals:

[0053] 1. First chuck; 2. Slide groove; 3. First threaded hole; 4. First convex edge; 5. Second convex edge; 6. Second chuck; 7. Third convex edge; 8. Relief groove; 9. Countersunk hole; 10. First boss; 11. Moving frame; 12. Fourth extension arm; 13. Slot; 14. Third extension arm; 15. First groove; 16. Second boss; 17. Second threaded hole; 18. Second groove; 19. Screw; 20. First plane; 21. Second plane; 22. Third plane; 23. Fourth plane; 24. Fifth plane; 25. Sixth plane; 26. Seventh plane; 27. Eighth plane; 28. Ninth plane; 29. Tenth plane; 30. Eleventh plane; 31. Twelfth plane; 32. Thirteenth plane; 33. Fourteenth plane; 34. First bearing to be removed; 35. Second bearing to be removed. Detailed implementation mode

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work fall within the protection scope of the present utility model.

[0055] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0056] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0057] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0058] In the existing planetary speed reducer, the planetary gear train inside is supported on the flange through the bearings on the planet carrier. After a period of use, it is necessary to disassemble the above-mentioned bearings for maintenance or replacement. In order to minimize the axial dimension of the planetary speed reducer as much as possible, the thickness of the bearing shoulder on the planet carrier is controlled, resulting in difficulty for the puller to engage with the outer ring of the bearing, and the bearing cannot be disassembled with the puller.

[0059] The existing methods for disassembling the bearings on the planet carrier are briefly described as follows: A plurality of axial disassembly threaded holes are machined on the bearing shoulder surface of the planet carrier. A plurality of ejector screws are screwed into the disassembly threaded holes from the rear end of the planet carrier, and the bearing is ejected by screwing the ejector screws. The above-mentioned method for disassembling the bearing has the following problems: First, it is necessary to ensure that the screwing depths of the plurality of ejector screws are as consistent as possible. If there is inconsistency, it will cause the inner ring of the bearing to be stuck; Second, since it is necessary to tighten the plurality of evenly distributed ejector screws simultaneously, it takes a relatively long disassembly time; Third, due to the relatively compact structure in the circumferential layout of the planetary gears, there is no space to lock in the ejector screws, and it is also necessary to disassemble the planetary gears to obtain the space to lock in the ejector screws, which greatly increases the time for replacing the bearings on the planet carrier.

[0060] In the existing design of the planet carrier structure, a groove for placing the puller is provided on the planet carrier to ensure that the puller can engage with the outer ring of the bearing. The above-mentioned structural setting method is very likely to cause stress concentration at the bottom of the groove, resulting in a weakening of the strength of the planet carrier. In order to increase the strength of the planet carrier, if the thickness of the planet carrier is increased additionally, it will instead cause an increase in the axial length of the planet carrier, which is contrary to the initial design goal.

[0061] In the prior art, there is also a double-disk puller that can engage with a smaller gap, but its disassembly process takes a lot of time.

[0062] Due to the above reasons, the present application proposes an improved bearing disassembly tooling.

[0063] As Figures 1 to 18 shown, a specific embodiment of the bearing disassembly tooling includes: a first chuck 1 and a movable chuck assembly. The bearing disassembly tooling of the present application is used in cooperation with a puller for disassembling the bearing.

[0064] As Figures 1 to 15 shown, the first chuck 1 is provided with a first extension arm and a second extension arm that are integrally formed and symmetrically arranged at an angle. Specifically, the first chuck 1 is provided with an opening and is in a symmetric V shape or arc shape. The shapes of the inner sides of the first extension arm and the second extension arm are configured to be suitable for engaging with the shoulder gap of the bearing, as Figure 1 and Figure 2As shown, the inner side of the first extension arm and the second extension arm is a first convex edge 4. And the outer side of the first extension arm and the second extension arm is provided with a second convex edge 5 for the puller jaws to be inserted into. One side of the mobile chuck assembly is provided with a third extension arm 14 suitable for inserting into the gap of the bearing shoulder; the two ends of the third extension arm 14 are suitable for sliding connection with the ends of the first extension arm and the second extension arm along the direction of the symmetry axis of the first extension arm and the second extension arm, and the angles between the three extension arms are always equal. The bearing disassembly tool is suitable for when the first chuck 1 is separated from the mobile chuck assembly, through the opening of the first chuck 1, the first convex edge 4 is inserted into the gap of the bearing shoulder, and then the third convex edge 7 is inserted into the gap of the bearing shoulder, and then the first chuck 1 and the mobile chuck assembly are connected.

[0065] The mobile chuck assembly is also provided with two fourth extension arms 12 parallel to each other; the two fourth extension arms 12 are located at both ends of the third extension arm 14 and are integrally formed with the third extension arm 14; the two fourth extension arms 12 are provided with strip holes 13 extending along the length direction thereof; the ends of the first extension arm and the second extension arm are provided with a slide groove 2 whose shape matches the shape of the bottom of the two fourth extension arms 12 for sliding cooperation at the position corresponding to the strip holes 13; the mobile chuck assembly is detachably connected to the first chuck 1 by fasteners penetrating the strip holes 13. Specifically, a first threaded hole 3 is provided on the bottom surface of the slide groove 2, and the fastener is a screw 19, and the mobile chuck assembly is suitable for being fixed to the first chuck 1 by the screw 19 penetrating the strip hole 13 and the first threaded hole 3.

[0066] The third extension arm 14 and the fourth extension arm 12 together constitute a mobile frame 11. The mobile chuck assembly includes a second chuck 6; the second chuck 6 is detachably connected to the third extension arm 14; specifically, at least two spaced first bosses 10 are provided on the top surface of the second chuck 6; a second groove 18 is provided on the bottom surface of the mobile frame 11 to match the first boss 10 on the second chuck 6; the first boss 10 matches the second groove 18 to position the second chuck 6. A countersunk hole 9 is provided on the bottom surface of the second chuck 6 at a position corresponding to the first boss 10.

[0067] The second chuck 6 is provided with a third flange 7 on the side facing the bearing, and the third flange 7 is suitable for being inserted into the gap of the bearing shoulder. Figures 5 to 8 As shown, a side of the second chuck 6 facing away from the bearing is provided with a clearance groove 8 for the puller clamping jaw to clamp into the outer side of the third extension arm 14.

[0068] like Figures 9 to 12As shown, a first groove 15 is provided in the middle of the top surface of the third extension arm 14; a second boss 16 is provided at the position corresponding to the first groove 15 in the middle of the bottom surface of the third extension arm 14; the second groove 18 is provided on the bottom surface of the second boss 16, and a second threaded hole 17 is provided on the second boss 16 along the direction of the second groove 18 up to the top surface.

[0069] As Figure 15 shown, after the fourth extension arm 12 is inserted into the sliding groove 2, the first convex edge 4 and the third convex edge 7 can be inserted into the bearing by the forward and backward movement of the second chuck 6 and the moving frame 11, and then the moving frame 11 and the first chuck 1 are fixed by the screw 19.

[0070] Furthermore, convex edges extending along their respective length directions are provided on the inner sides of the first extension arm, the second extension arm and the moving chuck assembly; the thickness of each convex edge gradually becomes thinner and smoothly transitions in the direction close to the bearing shoulder gap. The second convex edge 5 on the outer sides of the first extension arm and the second extension arm is provided through their length directions.

[0071] As Figures 9 to 12 shown, the two fourth extension arms 12 of the moving frame 11 extend towards the same side along the sliding direction. As Figures 13 to 15 shown, the bearing dismounting tool has a first dismounting state in which the extending sides of the two fourth extension arms 12 face the first bearing to be dismounted 34. As Figures 16 to 18 shown, the bearing dismounting tool has a second dismounting state in which the extending sides of the two fourth extension arms 12 face away from the second bearing to be dismounted 35. Among them, the specification size of the first bearing to be dismounted 34 is larger than the specification size of the second bearing to be dismounted 35. That is, by rotating the moving frame 11 by 180°, the working space of the bearing dismounting tool is adjusted, and then bearings with large differences in size specifications are dismounted. In this application, by rotating the moving frame 11, bearings with large differences in size specifications can be dismounted, and the adjustment is simple and convenient.

[0072] Specifically, as Figures 1 to 12 shown, the bottom surface of the sliding groove 2 is a fourth plane 23, the bottom surface of the first groove 15 is a fifth plane 24, and the fourth plane 23 and the fifth plane 24 are coplanar. The bottom surface of the first chuck 1 is a sixth plane 25, the bottom surface of the second chuck 6 is a seventh plane 26, and the sixth plane 25 and the seventh plane 26 are coplanar.

[0073] As Figures 1 to 15As shown, in the first disassembled state, an eleventh plane 30 is formed on one side of the second boss 16 away from the extending direction of the fourth extension arm 12; a ninth plane 28 is formed on a part of the outer side of the first chuck 1 near the top surface, and a tenth plane 29 is formed on a part of the outer side of the first chuck 1 near the bottom surface; the ninth plane 28 and the tenth plane 29 are horizontally separated by a first distance; the bottom surface of the relief groove 8 forms a twelfth plane 31; the eleventh plane 30 and the twelfth plane 31 are horizontally separated by a second distance; the first distance is the same as the second distance.

[0074] As Figures 1 to 12 shown, an eighth plane 27 is formed on the edge of the second convex edge 5, and the sixth plane 25 and the eighth plane 27 are vertically separated by a third distance; the bottom surface of the second boss 16 forms a thirteenth plane 32, and the seventh plane 26 and the thirteenth plane 32 are vertically separated by a fourth distance; the third distance is the same as the fourth distance.

[0075] As Figure 1 、 Figure 3 、 Figure 7 、 Figure 13 and Figure 15 shown, first planes 20 and 21 are respectively formed on the edges of two first convex edges 4 corresponding to the first extension arm and the second extension arm; the edge of the third convex edge 7 forms a third plane 22; the first plane 20, the second plane 21 and the third plane 22 are distributed at an angle of 60° to each other. When disassembling the bearing, the bearing disassembly tooling of the present application can hold the bearing in the shape of an equilateral triangle, maintain stability, ensure that the first convex edge 4 and the third convex edge 7 are evenly inserted into the bearing, and the bearing is evenly stressed.

[0076] As Figures 1 to 15 shown, in the first disassembled state, the first plane 20 and the ninth plane 28 are horizontally separated by a fifth distance, and the third plane 22 and the eleventh plane 30 are horizontally separated by a sixth distance; the fifth distance is the same as the sixth distance.

[0077] As Figures 1 to 15 shown, in the first disassembled state, an eleventh plane 30 is formed on one side of the second boss 16 away from the extending direction of the fourth extension arm 12, and a fourteenth plane 33 is formed on one side of the second boss 16 facing the extending direction of the fourth extension arm 12; the eleventh plane 30 protrudes from the third extension arm 14 by a first height, and the fourteenth plane 33 protrudes from the third extension arm 14 by a second height, and the first height is the same as the second height.

[0078] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to list all implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of this utility model creation.

Claims

1. A bearing disassembly tool, characterized in that: include: The first chuck (1) is provided with a first extension arm and a second extension arm which are integrally formed and symmetrically arranged at an angle to each other; the inner sides of the first extension arm and the second extension arm are configured to be suitable for clamping into the shoulder gap of the bearing, and the outer sides of both are provided with a second convex edge (5) for the puller clamping jaw to clamp into; A movable chuck assembly has a third extension arm (14) on one side which is suitable for being inserted into the gap of the bearing shoulder; both ends of the third extension arm (14) are suitable for being slidably connected with the ends of the first extension arm and the second extension arm along the direction of the symmetry axis of the first extension arm and the second extension arm, and the angles between the three extension arms are always equal.

2. The bearing disassembly tool according to claim 1, characterized in that: The movable chuck assembly is also provided with two fourth extension arms (12) parallel to each other; the two fourth extension arms (12) are located at both ends of the third extension arm (14) and are integrally formed with the third extension arm (14); the two fourth extension arms (12) are provided with strip holes (13) extending along their length direction; the ends of the first extension arm and the second extension arm are provided with sliding grooves (2) whose shapes match the shapes of the bottoms of the two fourth extension arms (12) at positions corresponding to the strip holes (13) for sliding cooperation; the movable chuck assembly is detachably connected to the first chuck (1) by fasteners penetrating the strip holes (13).

3. The bearing disassembly tool according to claim 2, characterized in that: The inner sides of the first extension arm, the second extension arm and the movable chuck assembly are all provided with convex edges extending along their respective length directions; the thickness of each convex edge gradually becomes thinner and smoothly transitions toward the direction close to the bearing shoulder gap.

4. The bearing disassembly tool according to claim 1, characterized in that: The second convex edges (5) on the outer sides of the first extension arm and the second extension arm are arranged to pass through the length direction of the two.

5. The bearing disassembly tool according to claim 3, characterized in that: The movable chuck assembly comprises a second chuck (6); the second chuck (6) is detachably connected to the third extension arm (14); a third flange (7) is provided on the side of the second chuck (6) facing the bearing, and the third flange (7) is suitable for being inserted into the gap of the bearing shoulder; a clearance groove (8) is provided on the side of the second chuck (6) away from the bearing, so that the puller jaws can be inserted into the outer side of the third extension arm (14).

6. The bearing disassembly tool according to claim 5, characterized in that: A first groove (15) is provided in the middle of the top surface of the third extension arm (14); The bottom surface of the slide groove (2) is a fourth plane (23), the bottom surface of the first groove (15) is a fifth plane (24), and the fourth plane (23) and the fifth plane (24) are coplanar; The bottom surface of the first chuck (1) is a sixth plane (25), the bottom surface of the second chuck (6) is a seventh plane (26), and the sixth plane (25) and the seventh plane (26) are coplanar.

7. The bearing disassembly tool according to claim 5, characterized in that: The third extension arm (14) and the fourth extension arm (12) together form a movable frame (11); at least two spaced first bosses (10) are provided on the top surface of the second chuck (6); a second groove (18) matching with the first boss (10) on the second chuck (6) is provided on the bottom surface of the movable frame (11); the second chuck (6) is positioned by the first boss (10) matching with the second groove (18).

8. The bearing disassembly tool according to claim 6, characterized in that: A second boss (16) is provided at a position corresponding to the first groove (15) in the middle of the bottom surface of the third extension arm (14); An eleventh plane (30) is formed on the second boss (16) on the side away from the extension direction of the fourth extension arm (12); a ninth plane (28) is formed on the outer side of the first chuck (1) near the top surface, and a tenth plane (29) is formed on the outer side of the first chuck (1) near the bottom surface; the ninth plane (28) and the tenth plane (29) are separated by a first distance in the horizontal direction; a twelfth plane (31) is formed on the bottom surface of the clearance groove (8); the eleventh plane (30) and the twelfth plane (31) are separated by a second distance in the horizontal direction; the first distance is the same as the second distance.

9. The bearing disassembly tool according to claim 8, characterized in that: The edge of the second convex edge (5) forms an eighth plane (27), and the sixth plane (25) is separated from the eighth plane (27) by a third distance in the vertical direction; The bottom surface of the second boss (16) forms a thirteenth plane (32), and the seventh plane (26) is separated from the thirteenth plane (32) by a fourth distance in the vertical direction; The third distance is the same as the fourth distance.

10. The bearing disassembly tool according to claim 9, characterized in that: A first convex edge (4) is provided on the inner side of the first chuck (1), and the edges of the two first convex edges (4) corresponding to the first extension arm and the second extension arm respectively form a first plane (20) and a second plane (21); the edge of the third convex edge (7) forms a third plane (22); The first plane (20) and the ninth plane (28) are separated by a fifth distance in the horizontal direction, and the third plane (22) and the eleventh plane (30) are separated by a sixth distance in the horizontal direction; the fifth distance is the same as the sixth distance.

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