Bearing inner ring disassembling tool

Abstract

The invention relates to the technical field of part disassembling tools, in particular to a bearing inner ring disassembling tool which comprises a supporting main body, a jacking piece is arranged on the supporting main body in a sliding mode, one end of the jacking piece is provided with a jacking tip used for stretching into a joint of two attached inner rings of a bearing, and the other end of the jacking piece is provided with a driving matching part. The tool further comprises a driving piece movably arranged on the supporting body, and the driving piece is provided with a driving part used for being matched with the driving matching part of the ejecting piece in an ejecting and pushing mode. The driving part is provided with an outer pushing position used for pushing the ejection part to slide outwards so as to separate the two inner rings through the ejection tip and an inner retracting position used for enabling the ejection part to slide inwards so as to avoid the inner rings, the tool is used for separating the two inner rings attached to the end face of the bearing, the two inner rings are gently stressed when being ejected, and the bearing is not prone to being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of parts disassembly tools, and in particular to a bearing inner ring disassembly tool. Background Art

[0002] As a convenient urban public transportation mode, subway has many advantages such as large capacity, easy to guarantee commuting time, and safety. It is a transportation mode vigorously developed in modern cities. As a key component related to the safety of subway operation, the axle box bearings of subway vehicles need to be loaded and operated for assessment before large-scale application. The bearings should be removed regularly to check the status of parts such as grease, ring raceway, and rolling element to confirm whether the bearings are faulty, which provides a basis for verifying the bearing performance and ensuring safe and reliable operation.

[0003] Many subway axle box bearings use double-row tapered roller bearings. The structure of this bearing is as follows: Figure 1 As shown, it includes an outer ring 3, two inner components, and a first sealing seat 1 and a second sealing seat 5 located at both ends of the bearing axial direction. The inner component includes an inner ring 2 and corresponding tapered rollers and a retainer. A sealing cover 4 is provided between the two sealing seats and the outer ring 3, and the center holes of the two inner rings 2 together constitute the center hole of the bearing. When disassembling the bearing, after removing the first sealing seat 1, the second sealing seat 5 and the sealing cover 4, the inner component needs to be separated from the outer ring 3. The bearing usually bears a large axial force during installation, so that the end faces of the inner rings 2 of the two inner components fit closely. After a period of use, there will be a certain adsorption force between the two inner components and it is not easy to separate. At present, when separating the inner rings 2 of the two inner components, the inner rings 2 are knocked to loosen the inner rings 2 and separate the two inner rings 2, which is easy to damage the bearing, and it is also inconvenient to apply force to the bearing with a small inner diameter and a large axial size. Summary of the invention

[0004] The purpose of the present invention is to provide a bearing inner ring disassembly tool to solve the problem that the bearing is easily damaged when the inner ring is knocked to separate the two inner rings whose end faces are in contact with each other.

[0005] The technical solution of the bearing inner ring disassembly tool of the present invention is: A bearing inner ring disassembly tool, the tool includes a supporting body, on which a push-up piece is slidably provided, one end of the push-up piece is provided with a push-up tip for extending into the joint between two inner rings of the bearing that are in contact with each other, and the other end is provided with a driving mating part. The tool also includes a driving piece movably arranged on the supporting body, the driving piece has a driving part for push-matching with the driving mating part of the push-up piece, the driving part has an outward pushing position for pushing the push-up piece to slide outward so as to separate the two inner rings through the push-up tip and an inward retracting position for the push-up piece to slide inward so as to avoid the inner ring.

[0006] Furthermore, the driving member can be rotatably arranged, and the outer peripheral surface of the driving part is used to form a gradient surface with a gradually changing distance relative to the rotation axis of the driving member, and the gradient surface is used to push the top opening member to slide outward when the driving part rotates from the retracted position to the outward pushed position.

[0007] Furthermore, the driving part is an elliptical cylinder, and the outer peripheral surface of the elliptical cylinder is used to form a gradual surface.

[0008] Furthermore, a sliding installation hole for the top opening member to be installed is provided on the support body.

[0009] Furthermore, a limiting structure for limiting the sliding stroke of the push-opening member is provided on the supporting body at the sliding mounting hole.

[0010] Furthermore, one of the supporting body and the top opening piece is provided with a limiting column, and the other is provided with a limiting long groove for the limiting column to extend into, and the limiting long groove or the limiting column constitutes a limiting structure.

[0011] Furthermore, a first bolt is threadedly connected to the support body, the first bolt has a portion extending into the sliding mounting hole, the first bolt forms a limiting column, and a limiting long groove is provided on the top opening.

[0012] Furthermore, the push-opening member is mounted in the sliding mounting hole to prevent rotation.

[0013] Furthermore, a convex portion is provided on the portion of the push-opening member extending out of the supporting body.

[0014] Furthermore, there are two top opening members, the sliding directions of the two top opening members are opposite and they are arranged in a straight line, the top opening tips are arranged at the opposite ends of the two top opening members, the driving part of the driving member is used to extend between the opposite ends of the two top opening members, and the driving matching parts are arranged at the opposite ends of the two top opening members.

[0015] Beneficial effect: The present invention provides a disassembly tool suitable for disassembling two inner rings of a bearing that are in contact with each other. The driving member and the push-up member cooperate to apply force to the joint of the two inner rings. When disassembling the two inner rings whose end faces are in contact with each other, the push-up member and the supporting body can be extended into the center hole of the bearing together, so that the push-up tip of the push-up member corresponds to the joint formed at the edges where the end faces of the two inner rings are in contact with each other. By moving the driving part of the driving member to an outward pushing position, the driving part will push the push-up member to slide outward relative to the supporting body, and the push-up tip of the push-up member will extend into the joint, thereby separating the two inner rings. When the driving part moves to an inward retracting position, the push-up member can slide inward relative to the supporting body to withdraw from the gap between the two inner rings, avoiding the inner rings to allow the tool to withdraw from the center hole of the bearing. The tool is used to separate the two inner rings whose end faces are in contact with each other. The two inner rings are subjected to gentle force when being pushed open, and are not easy to cause damage to the bearing.

[0016] Furthermore, by rotating the driving part, the driving part is rotated to the outward push position, and the push-up part is pushed by the gradient surface on the outer peripheral surface of the driving part, whose distance relative to the rotation axis is gradually changed. The parts of the gradient surface with different distances from the rotation axis push and contact the push-up part in turn, so that the push-up part slides outward to extend into the joint between the two inner rings that are close to each other. The driving part will push the push-up part to slide outward relative to the supporting body, and the top opening tip of the push-up part will extend into the joint. The rotation of the driving part is converted into the sliding of the push-up part by the gradient surface, so that the push-up part can realize linear movement and be directly inserted into the joint between the two inner rings that are close to each other. This force transmission method that uses the rotating driving part to cooperate with the outer peripheral gradient surface to drive the push-up part to slide outward can simplify the force on the push-up part, so that the push-up part slides directly into the joint between the two inner rings that are close to each other, and then separates the two inner rings. The force transmission structure is simple and the force bearing is reliable. The two inner rings can be separated into place by the linear sliding of the push-up part, and a large torque can be applied to facilitate disassembly operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the structural schematic diagram of the axle box bearing; Figure 2 This is a schematic structural diagram of a bearing inner ring disassembly tool according to Embodiment 1 of the present invention; Figure 3 A schematic diagram of the positional relationship of the two inner rings being pushed open by the push-opening member of the bearing inner ring disassembly tool according to Embodiment 1 of the present invention; Figure 4 for Figure 2 A schematic diagram of the structure of the top opening member in FIG. Figure 5 for Figure 4 A schematic diagram of the structure of the top opening tip; Figure 6 for Figure 2 A schematic diagram of the structure of the supporting body in FIG. Figure 7 for Figure 2 A front view of the driving member in FIG. Figure 8 for Figure 2 A bottom view of the driving member in FIG. Fig. 9 This is a schematic structural diagram of a push-opening component of a bearing inner ring disassembly tool according to Embodiment 2 of the present invention; Fig.10 A schematic diagram of a front view of a driving member of a bearing inner ring disassembly tool according to Embodiment 2 of the present invention; Fig.11 A schematic diagram of a bottom view of a driving member of a bearing inner ring disassembly tool according to Embodiment 2 of the present invention; Fig.12 This is a schematic diagram of the cooperation between the driving part and the push-opening member of the bearing inner ring disassembly tool of embodiment 3 of the present invention; Fig.13A schematic diagram of a front view of a driving member of a bearing inner ring disassembly tool according to a fourth embodiment of the present invention; Fig.14 This is a schematic diagram of a side view of a driving component of a bearing inner ring disassembly tool according to embodiment 4 of the present invention.

[0018] In the figure: 1. first sealing seat; 2. inner ring; 3. outer ring; 4. sealing cover; 5. second sealing seat; 11. opening member; 111. opening tip; 112. sliding body; 113. second threaded hole; 114. limiting long groove; 12. supporting body; 121. sliding mounting hole; 122. first threaded hole; 123. rotating mounting hole; 13. driving member; 131. driving part; 132. rotating rod; 133. handle; 14. first bolt; 15. second bolt. DETAILED DESCRIPTION

[0019] The present invention provides a disassembling tool suitable for disassembling two inner rings of a bearing that are in contact with each other. The driving member and the push-up member cooperate to apply force to the joint of the two inner rings. When disassembling the two inner rings whose end faces are in contact with each other, the push-up member and the supporting body can be extended into the central hole of the bearing together, so that the push-up tip of the push-up member corresponds to the joint formed at the edges where the end faces of the two inner rings are in contact with each other. By moving the driving part of the driving member to an outward pushing position, the driving part will push the push-up member to slide outward relative to the supporting body, and the push-up tip of the push-up member will extend into the joint, thereby separating the two inner rings. When the driving part moves to an inward retracting position, the push-up member can be slid inward relative to the supporting body to withdraw from the gap between the two inner rings, and the inner rings are avoided so that the tool can withdraw from the central hole of the bearing. The tool is used to separate the two inner rings whose end faces are in contact with each other. The two inner rings are subjected to gentle force when being pushed open, and are not easy to cause damage to the bearing.

[0020] Embodiment 1 of the bearing inner ring disassembly tool of the present invention: The bearing inner ring disassembly tool in this embodiment is used to disassemble the bearing inner ring. Figure 1 The bearing shown is a double-row tapered roller bearing, comprising an inner component, a first sealing seat 1, an outer ring 3, a second sealing seat 5 and two upper and lower sealing covers 4. The inner component comprises an inner ring 2 and corresponding rollers and a retaining frame. The center holes of the two inner rings 2 together constitute the center hole of the bearing. The end faces of the two inner rings 2 are in contact with each other. The bearing inner ring disassembly tool is used to separate the two inner rings 2 that are tightly in contact with each other of the bearing, and remove the inner component from the outer ring 3.

[0021] like Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the bearing inner ring disassembly tool includes a support body 12, a push-up member 11, and a driving member 13. There are two push-up members 11, which constitute a first push-up member 11 and a second push-up member 11 respectively. The push-up members 11 are slidably arranged on the support body 12. The sliding directions of the two push-up members 11 are opposite when sliding. The two push-up members 11 are symmetrically arranged in the sliding direction, so that the two push-up members 11 are arranged in a straight line. The driving member 13 is rotatably mounted on the support body 12, and the push-up members 11 can be driven to slide by rotating the driving member 13. The two push-up members 11 have opposite opposite ends and opposite ends facing each other. The opposite ends of the two push-up members 11 are inner ends, and the opposite ends are outer ends. The opposite ends of the push-up members 11 are provided with a push-up tip 111 for extending into the joint of the two inner rings 2 of the bearing. The push-up tip 111 is a wedge-shaped structure to form a tip. The end surfaces of the opposite ends of the two push-up members 11 constitute a driving mating portion mating with the driving member 13. The inner edges of the contacting end faces of the two inner rings 2 are chamfered, so that a seam is formed at the joint of the two inner rings 2. The driving member 13 has a driving portion for extending between the opposite ends of the two push-opening members 11, and the driving portion can push the end faces of the opposite ends of the two push-opening members 11. The driving portion has an outward push position for pushing the two push-opening members 11 away from each other to separate the two inner rings 2 through the push-opening tip 111, and an inward retracted position for allowing the two push-opening members 11 to approach each other to avoid the inner ring 2.

[0022] After the tool is inserted into the center hole of the bearing, the top opening tip 111 of the top opening member 11 corresponds to the joint of the two inner rings 2. By rotating the driving member 13, the driving part of the driving member 13 pushes the top opening member 11 outward, and the top opening member 11 slides linearly, that is, slides outward relative to the supporting body 12 along the radial direction of the bearing, so that the two top opening members 11 are separated from each other, and then the tip of the top opening member 11 is used to separate the two inner rings 2. The top opening tip 111 of the top opening member 11 is directly inserted into the gap between the two inner rings 2, and the driving part is in the outward push position. As the thicker part is inserted, the two inner components are separated and pushed out of the outer ring 3. When it is necessary to remove the tool from the center hole of the bearing, the driving member 13 is rotated to make its driving part in the inner retracted position, and then the two top opening members 11 are brought close to each other, and the top opening member 11 slides inward and withdraws from the gap between the two inner rings 2, so that the inner ring 2 is avoided to remove the tool. The distance between the two top opening members 11 can be adjusted to accommodate inner rings 2 of different sizes.

[0023] like Figure 2 , Figure 4 , Figure 6As shown, the support body 12 is provided with a sliding mounting hole 121 for the corresponding push-up member 11 to be installed, and the sliding mounting hole 121 corresponds to the push-up member 11 one by one. The push-up member 11 has a sliding body 112, and the sliding body 112 is slidably arranged in the sliding mounting hole 121. The push-up tip 111 is integrally connected with one end of the sliding body 112 that extends outward from the support body 12. The sliding body 112 of the push-up member 11 is generally rectangular, and the sliding mounting hole 121 is a rectangular hole, so that the push-up member 11 can be fixedly installed in the sliding mounting hole 121 to maintain the orientation of the push-up tip 111. The sliding body 112 is provided with a limiting long groove 114, and the supporting body 12 is provided with a first threaded hole 122 at the sliding mounting hole 121. The first threaded hole 122 is connected with the corresponding sliding mounting hole 121, and the first threaded hole 122 is internally threaded with a first bolt 14, and the first bolt 14 has a portion extending into the sliding mounting hole 121, and the first bolt 14 forms a limiting column, and the first bolt 14 extends into the limiting long groove 114. When the top opening member 11 slides relative to the supporting body 12, the position of the first bolt 14 in the limiting long groove 114 changes accordingly, and the first bolt 14 constitutes a limiting structure for limiting the sliding stroke of the corresponding top opening member 11. The top opening member 11 is also provided with a second threaded hole 113, and the second threaded hole 113 is internally threaded with a second bolt 15, and the second bolt 15 constitutes a convex portion provided on the portion of the top opening member 11 extending outside the supporting body 12, and the second bolt 15 is used to facilitate pulling the top opening member 11.

[0024] like Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8As shown, the support body 12 is provided with a rotating installation hole 123 for the driving member 13 to be rotatably installed. The rotating installation hole 123 is arranged in the middle of the support body 12. The thickness of the middle of the support body 12 is greater than the thickness of the two side parts. The rotating installation hole 123 is a vertical through hole, and the sliding installation hole 121 is a horizontal extension hole. The driving member 13 includes a driving part 131, a rotating rod 132, and a handle 133. The driving part 131 is an elliptical head. The driving part 131 and the handle 133 are respectively welded and fixed at both ends of the rotating rod 132. The driving part 131 is an elliptical cylinder. The driving part 131 constitutes the driving part of the driving member 13. The rotating rod 132 is a vertical rod, and the handle 133 is formed by a horizontal extension rod. The rotating installation hole 123 has a large hole section with a larger aperture and a small hole section with a smaller aperture. The driving part 131 is located in the large hole section, the rotating rod 132 is penetrated in the small hole section, and the handle 133 is located outside the support body 12 so that the driving member 13 can be rotated by hand. The sliding mounting hole 121 is correspondingly connected to the large hole section of the rotating mounting hole 123, so that the driving part 131 and the opposite end of the push-opening member 11 can form a push-opening fit. The driving part 131 has a wider portion corresponding to its long axis and a narrower portion corresponding to its short axis, where the width and narrowness are the dimensions in the horizontal direction, and the two push-opening members 11 can be moved away from or close to each other by using the wider and narrower portions of different sizes. The outer peripheral surface of the driving part 131 is used to form a gradient surface with a gradual change in the distance between the driving part and the rotation axis of the driving member 13. The gradient surface is used to push the top opening member 11 to slide outward when the driving part switches from the inward position to the outward position. The gradient surface is arranged around the rotation axis of the driving member 12. The direction of the rotation axis of the driving member 12 is perpendicular to the sliding direction of the top opening member 11. The gradient surface has a part that is opposite to the top opening member 11. When the driving member 12 rotates, the gradient surface also rotates accordingly. The gradient surface pushes the top opening member 11 to slide in a straight line, so that the top opening member 11 is inserted into the joint of the two inner rings 2 along the radial direction of the bearing. The force transmission structure is simple and reliable to use.

[0025] The handle 133 is rotated to gradually turn the long axis of the driving part 131 toward the sliding mounting hole 121 of the supporting body 12. The driving part 131 is rotated to the outward push position, and the outward push portion where the long axis is located corresponds to the push-out piece 11. The push-out piece 11 is pushed outward, and the two push-out pieces 11 are moved away from each other. The distance between the two push-out pieces 11 increases, and the tip of the push-out piece 11 is inserted between the two inner rings 2 to separate the two inner rings 2. When the driving part 131 is rotated to the inward retracted position, the inward retracted portion where the short axis is located corresponds to the push-out piece 11, and the driving part 131 avoids the push-out piece 11 from sliding inward, and the two push-out pieces 11 can be close to each other, which is convenient for the tool to be inserted into the center hole of the bearing or taken out from the center hole of the bearing.

[0026] In other embodiments, only one push-opening member may be provided. In this case, the support body may have a force-applying holding portion located outside the center hole of the bearing, and the operator may hold the position of the support body with one hand and twist the handle with the other hand.

[0027] In other embodiments, the driving part may also be a prism, the horizontal cross-section of the prism is generally rhombus-shaped, the edges of the prism are rounded, the longer diagonal of the rhombus corresponds to the outward-extended part, and the shorter diagonal of the rhombus corresponds to the inward-extended part.

[0028] In other embodiments, the support body may also have a sliding groove on its surface, the push-opening member is slidably disposed in the sliding groove, and the sliding groove is connected to the rotating mounting hole on the support body so that the driving member can push the push-opening member.

[0029] In other implementations, a limiting long groove may be provided on the supporting body, and a limiting column may be provided on the top opening member, and the limiting column may constitute a limiting structure.

[0030] In other embodiments, the limiting column can also be formed by a latch, and the support body is provided with a through hole for the latch to pass through so that the latch can extend into the limiting long groove on the top opening member.

[0031] In other embodiments, the convex portion on the portion of the push-opening member extending out of the supporting body may also be formed by a convex column that is welded and fixed to the push-opening member.

[0032] Embodiment 2 of the bearing inner ring disassembly tool of the present invention: The difference between this embodiment and the above-mentioned embodiment 1 lies in the number of the top opening members and the structure of the matching part between the driving part and the top opening member. In this embodiment, three top opening members are arranged on the support body, and the three top opening members are distributed circumferentially, so that the driving part can push the top opening member to slide. Fig. 9 , Fig.10 , Fig.11 As shown, one end of the push-opening member 11 for cooperating with the driving part 131 of the driving member is spherical, and the driving part 131 of the driving member includes three convex parts distributed around the circumference, and the convex part has a gradient surface with a gradient distance relative to the rotation axis of the driving member for pushing the push-opening member to slide outward, and the gradient surface can be an arc surface, and the part of the convex part farthest from the axis of the driving part can be used to extend the push-opening member to the farthest position, and the part of the adjacent convex part closest to the axis of the driving part can be used to avoid the push-opening member so that it can be retracted inward to the retracted position. The handle 133 and the rotary rod 132 of the driving member are the same as those in the above-mentioned embodiment 1.

[0033] Embodiment 3 of the bearing inner ring disassembly tool of the present invention: The difference between this embodiment and the above-mentioned embodiment 1 lies in the matching structure between the driving part and the top opening member. In this embodiment, Fig.12As shown, the driving part 131 is a gear, and the ends of the two top opening members 11 for cooperating with the driving part 131 of the driving member are respectively provided with racks to cooperate with the gears to form a double-acting gear and rack mechanism. The driving member is rotated so that the two top opening members 11 can slide relative to or away from each other in cooperation with the gear and the rack. The rack is set at a position biased to one side of the end of the top opening member so that the two top opening members can slide on the same straight line.

[0034] Embodiment 4 of the bearing inner ring disassembly tool of the present invention: The difference between this embodiment and the above-mentioned embodiment 1 lies in the matching structure between the driving part and the top opening member. In this embodiment, Fig.13 , Fig.14 As shown, the driving part 131 of the driving member is a truncated cone structure, the outer peripheral surface is a conical surface, and the end of the top opening member matched with it is an inclined surface. The driving part 131 moves downward, and the diameter of the part matched with the end inclined surface of the top opening member gradually increases, pushing the top opening member to slide outward. The handle 133 and the rotating rod 132 of the driving member are the same as those in the above-mentioned embodiment 1.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bearing inner ring disassembly tool, characterized in that: The tool includes a supporting body, on which a push-up piece is slidably provided, one end of the push-up piece is provided with a push-up tip for extending into the joint between two inner rings of the bearing, and the other end is provided with a driving mating part. The tool also includes a driving piece movably arranged on the supporting body, the driving piece has a driving part for pushing and mating with the driving mating part of the push-up piece, the driving part has an outward pushing position for pushing the push-up piece to slide outward so as to separate the two inner rings through the push-up tip, and an inward retracting position for the push-up piece to slide inward so as to avoid the inner rings.

2. The bearing inner ring disassembly tool according to claim 1 is characterized in that the driving part is rotatably arranged, and the outer peripheral surface of the driving part is used to form a gradient surface with a gradually changing distance relative to the rotation axis of the driving part, and the gradient surface is used to push the top opening part to slide outward when the driving part rotates from the inward position to the outward position.

3. The bearing inner ring disassembly tool according to claim 2, characterized in that: The driving part is an elliptical cylinder, and the outer peripheral surface of the elliptical cylinder is used to form a gradual surface.

4. The bearing inner ring disassembly tool according to claim 1, 2 or 3, characterized in that: The supporting body is provided with a sliding installation hole for the top opening part to be installed.

5. The bearing inner ring disassembly tool according to claim 4, characterized in that: A limiting structure for limiting the sliding stroke of the top opening member is provided at the sliding installation hole on the supporting body.

6. The bearing inner ring disassembly tool according to claim 5, characterized in that: One of the supporting body and the top opening piece is provided with a limiting column, and the other is provided with a limiting long groove for the limiting column to extend into, and the limiting long groove or the limiting column constitutes a limiting structure.

7. The bearing inner ring disassembly tool according to claim 6, characterized in that: A first bolt is threadedly connected to the support body. The first bolt has a portion extending into the sliding installation hole. The first bolt forms a limiting column. The top opening piece is provided with a limiting long groove.

8. The bearing inner ring disassembly tool according to claim 4, characterized in that: The top opening piece is mounted in the sliding mounting hole to prevent rotation.

9. The bearing inner ring disassembly tool according to claim 4, characterized in that: A convex portion is arranged on the portion of the push-opening member extending out of the supporting body.

10. The bearing inner ring disassembly tool according to claim 1, 2 or 3, characterized in that: There are two top opening members, the sliding directions of the two top opening members are opposite and they are arranged in a straight line, the top opening tips are arranged at the opposite ends of the two top opening members, the driving part of the driving member is used to extend between the opposite ends of the two top opening members, and the driving matching parts are arranged at the opposite ends of the two top opening members.

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