A device for extracting a bearing outer ring

Abstract

This application discloses a bearing outer ring removal device, including a connector, a central shaft, and at least two support petals that mate with the central shaft and are arranged along the circumferential outer wall of the central shaft. The central shaft drives the support petals to move away from the central shaft. A positioning structure is provided between the support petals and the connector for fixing the support petals to the connector. An outer edge is provided on the side of the support petals away from the central shaft. In this application, multiple support petals are first passed through the outer ring, and then the central shaft is passed through the space between the multiple support petals, so that the circumferential outer wall of the central shaft fits against the side of the support petals facing the central shaft, and the side of the support petals away from the central shaft fits against the circumferential inner wall of the outer ring. The positioning structure achieves a fixed connection between the multiple support petals and the connector. Pulling the connector causes the outer edge to abut against one end of the outer ring, thereby moving the outer ring out of a blind hole or stepped hole by pulling the connector. This removal device replaces traditional auxiliary tools, improving the convenience of outer ring disassembly and effectively shortening the disassembly time.

Description

Technical Field

[0001] This application relates to the technical field of auxiliary tools for bearing assembly and disassembly, and in particular to a device for removing the outer ring of a bearing. Background Technology

[0002] In the machinery industry, bearings are crucial components for motion transmission. During bearing installation, the inner ring is often fitted to a journal, and then the bearing is fixed in a blind or stepped hole in a roller, keeping the outer ring fixed to the roller to achieve the bearing's transmission function. Over time, bearings can become damaged. Once damaged, they need to be removed from the roller. The inner ring is relatively easy to remove, but the outer ring is prone to getting stuck in the blind or stepped hole, making removal difficult. Even experienced workers may need more than half an hour to remove it using traditional tools, thus requiring improvement. Summary of the Invention

[0003] The purpose of this application is to provide a bearing outer ring removal device to solve the problem of difficult disassembly of the bearing outer ring.

[0004] The bearing outer ring removal device provided in this application adopts the following technical solution:

[0005] A bearing outer ring removal device includes a connector, a central shaft, and at least two support petals that mate with the central shaft and are arranged along the circumferential outer wall of the central shaft. The central shaft is used to drive the support petals to move away from the central shaft. A positioning structure is provided between the support petals and the connector for fixing the support petals to the connector. An outer edge is provided on the side of the support petals away from the central shaft.

[0006] By adopting the above technical solution, when removing the outer ring, multiple support petals first pass through the outer ring, and then the central shaft passes through the multiple support petals, so that the circumferential outer wall of the central shaft fits against the side of the support petals facing the central shaft. The central shaft pushes the multiple support petals outward, so that the side of the support petals away from the central shaft fits against the circumferential inner wall of the outer ring. Then, the positioning structure realizes the fixed connection between the multiple support petals and the connector. By pulling the connector, the outer edge abuts against one end of the outer ring, thereby realizing the removal of the outer ring from the blind hole or stepped hole by pulling the connector. The removal device replaces the traditional auxiliary tools, improving the convenience of outer ring disassembly and effectively shortening the disassembly time.

[0007] Optionally, the central axis is provided with a frustum, the support petal is provided with a protrusion, and the protrusion is provided with a stepped groove that mates with the circumferential outer wall of the frustum.

[0008] By adopting the above technical solution, when multiple support petals cooperate with the central axis, the frustum simultaneously cooperates with the stepped grooves on several protrusions, which can limit the support petals from continuing to slide along the length of the central axis toward the frustum, thereby improving the stability of the cooperation between the support petals and the central axis.

[0009] Optionally, the connector is provided with a positioning groove for the central shaft to be inserted after it mates with all the support petals. The positioning structure includes a positioning block disposed on the circumferential groove wall of the positioning groove, a locking block disposed on the side of the protrusion away from the central shaft, and a fastener disposed on the connector. The limiting block and the locking block correspond one-to-one, and the fastener mates with the corresponding protrusion.

[0010] By adopting the above technical solution, multiple support petals are inserted into the positioning groove together after cooperating with the central shaft. This causes the multiple support petals and the central shaft to rotate simultaneously, or causes the connector to rotate, so that the side of the locking block facing the opening of the positioning groove abuts against the corresponding positioning block, thereby restricting the support petals from moving out of the positioning groove. Then, the locking block is tightened by fasteners, and the support petals are pressed against the central shaft. The multiple support petals clamp the central shaft to achieve a fixed connection of multiple support petals, central shaft and connector.

[0011] The card block enters the positioning groove between two positioning blocks, and after multiple support petals cooperate with the central axis, they are inserted into the positioning groove together to achieve the effect of guidance and positioning.

[0012] Optionally, the fastener is a positioning bolt threaded onto the connector, and the shank of the positioning bolt can extend into the positioning groove.

[0013] By adopting the above technical solution, after the locking block abuts against the corresponding positioning block, rotating the positioning bolt causes the shank of the positioning bolt to penetrate and abut against the side of the corresponding locking block away from the protrusion, thereby tightening the support petal against the central shaft and achieving a fixed connection between the support petal, the central shaft, and the connector.

[0014] Optionally, the connector includes a front part and a rear part disposed on the front part, the rear part being provided with a connecting screw, and the positioning groove being disposed on the front part.

[0015] By adopting the above technical solution, the connecting screw can be detachably connected to the external handle, thereby improving the convenience of pulling the connector.

[0016] Optionally, the front part is provided with a threaded hole, and the rear part is provided with a threaded end that is threadedly connected to the threaded hole.

[0017] By adopting the above technical solution, the detachable connection between the front and rear parts facilitates the replacement of front and rear parts of different specifications.

[0018] Optionally, a movable plate is provided in the positioning groove, and a relief groove and a spiral groove are provided on the circumferential groove wall of the positioning groove. The relief groove extends along the groove depth direction of the positioning groove. One end of the spiral groove is connected to the relief groove and the other end corresponds to the fastener. The movable plate is provided with a movable rod that is slidably connected in the relief groove and the spiral groove. The positioning groove is provided with a reset member that drives the movable plate to reset.

[0019] By adopting the above technical solution, when multiple support petals are inserted into the positioning groove together with the central shaft, the movable plate abuts against the protrusion and the frustum. The movable plate moves in the direction of the positioning groove under force, and the reset component undergoes elastic deformation under force, ensuring the tendency of elastic reset. The movable rod first slides along the relief groove. At this time, the movable plate moves along the groove depth of the positioning groove. The movable rod then slides along the spiral groove. At this time, the movable plate rotates around its own axis while moving along the groove depth of the positioning groove. While the movable plate rotates, it can also drive multiple support petals and the central shaft to rotate simultaneously or drive the connector to rotate through friction. When the movable rod moves to the end of the spiral groove corresponding to the fastener, the side of the locking block facing the groove opening of the positioning groove abuts against the corresponding positioning block. The locking block aligns with the corresponding fastener, which facilitates the alignment of the locking block and the fastener.

[0020] When multiple support petals rotate with the central shaft and move out of the positioning groove, the reset component elastically resets, causing the movable plate to move toward the opening of the positioning groove, and the movable rod to move along the spiral groove toward the clearance groove. After the multiple support petals rotate with the central shaft and completely move out of the positioning groove, the movable plate also resets to its initial position.

[0021] Optionally, one end of the positioning block is provided with a guide surface.

[0022] By adopting the above technical solution, during the rotation of the support petal and the central axis, the guide surface reduces the contact between the locking block and the positioning block, thereby improving the smoothness of the rotation of the support petal and the central axis.

[0023] Optionally, the movable plate is slidably connected to an abutment plate, and the movable plate is provided with an elastic element that drives the abutment plate to move away from itself.

[0024] By adopting the above technical solution, when multiple support petals are inserted into the positioning groove together after being fitted with the central shaft, the abutment plate is first subjected to force and moves towards the moving plate. The elastic element is subjected to force and undergoes elastic deformation, and maintains the tendency of elastic reset. When the locking block is aligned with the positioning block, the elastic element abuts against the abutment plate, and the abutment plate drives the locking block to abut against the positioning block, which can achieve the initial fixation of multiple support petals, central shaft and connector, and facilitate the fasteners to abut against the corresponding locking blocks.

[0025] Optionally, the abutment plate is provided with a groove that engages with the frustum and the protrusion.

[0026] By adopting the above technical solution, the frustum and the protrusion are embedded in the groove. When the abutment plate rotates under the action of the movable plate, it can facilitate the abutment plate to drive multiple support petals and the central shaft to rotate simultaneously or drive the connector to rotate. During use, only force needs to be applied in the direction of the groove depth of the positioning groove, which effectively reduces the force on the support petals and the central shaft after rotating the connector or after rotation.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When removing the outer ring, multiple support petals first pass through the outer ring, and then the central shaft passes between the multiple support petals, so that the circumferential outer wall of the central shaft fits against the side of the support petals facing the central shaft. The central shaft pushes the multiple support petals outward, so that the side of the support petals away from the central shaft fits against the circumferential inner wall of the outer ring. Then, the positioning structure realizes the fixed connection between the multiple support petals and the connector. By pulling the connector, the outer edge abuts against one end of the outer ring, thereby realizing the removal of the outer ring from the blind hole or stepped hole by pulling the connector. The removal device replaces the traditional auxiliary tools, improving the convenience of outer ring disassembly and effectively shortening the disassembly time.

[0029] 2. When multiple support petals are inserted into the positioning groove together with the central shaft, the movable plate abuts against the protrusion and the frustum. The movable plate moves in the direction of the positioning groove under force, and the reset component undergoes elastic deformation under force, ensuring the tendency of elastic reset. The movable rod first slides along the relief groove. At this time, the movable plate moves along the groove depth of the positioning groove. The movable rod then slides along the spiral groove. At this time, the movable plate rotates around its own axis while moving along the groove depth of the positioning groove. While the movable plate rotates, it can also drive multiple support petals and the central shaft to rotate simultaneously or drive the connector to rotate through friction. When the movable rod moves to the end of the spiral groove corresponding to the fastener, the side of the locking block facing the groove opening of the positioning groove abuts against the corresponding positioning block. The locking block aligns with the corresponding fastener, which facilitates the alignment of the locking block and the fastener. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0031] Figure 2 This is a schematic diagram of the support flap and central axis of Embodiment 1 of this application;

[0032] Figure 3 This is a partial cross-sectional schematic diagram of Embodiment 1 of this application;

[0033] Figure 4 This is a cross-sectional schematic diagram of Embodiment 2 of this application;

[0034] Figure 5 This is a schematic diagram of the structure of the movable plate in Embodiment 2 of this application;

[0035] Figure 6 This is a schematic diagram of the connector structure of Embodiment 2 of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Connector; 11. Front part; 111. Positioning groove; 112. Threaded hole; 113. Relief groove; 114. Spiral groove; 12. Rear part; 121. Connecting screw; 122. Threaded end; 2. Central shaft; 21. Frustum; 3. Support petal; 31. Outer edge; 32. Protrusion; 321. Stepped groove; 4. Positioning structure; 41. Positioning block; 411. Guide surface; 42. Locking block; 43. Fastener; 5. Movable plate; 51. Movable rod; 52. Elastic element; 6. Reset element; 7. Abutment plate; 71. Insert groove; 8. Outer ring. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail.

[0038] Example 1

[0039] Embodiment 1 of this application discloses a bearing outer ring removal device.

[0040] Reference Figure 1 , Figure 2 A bearing outer ring removal device includes a connector 1, a central shaft 2, and two support petals 3 that mate with the central shaft 2 and are arranged along the circumferential outer wall of the central shaft 2. During use, the central shaft 2 passes between the two support petals 3 and drives the support petals 3 to move away from the central shaft 2. The support petals 3 are arranged in an arc shape that fits against the circumferential outer wall of the central shaft 2. This embodiment is described in the usage state. A positioning structure 4 for fixing the support petals 3 to the connector 1 is installed between the support petals 3 and the connector 1. One end of the support petal 3, facing away from the central shaft 2, has an integrally formed outwardly protruding outer edge 31.

[0041] Reference Figure 1 , Figure 2 One end of the central axis 2 is integrally formed with a frustum 21, the radius of which is larger than that of the central axis 2. One end of the support petal 3 is integrally formed with a protrusion 32 corresponding to the frustum 21 and protruding in a direction away from the central axis 2. The protrusion 32 has a stepped groove 321 on the side facing the central axis 2 that matches the circumferential outer wall of the frustum 21.

[0042] Reference Figure 2 , Figure 3 The connector 1 includes a front part 11 and a rear part 12 connected to one end of the front part 11. A connecting screw 121 is integrally formed at the end of the rear part 12 away from the front part 11. A threaded hole 112 is provided at the end of the front part 11 facing the rear part 12, and a threaded end 122 for threaded connection is integrally formed at the end of the rear part 12.

[0043] Reference Figure 2 , Figure 3 The front part 11 is provided with a positioning groove 111 at the end away from the rear part 12 for the central shaft 2 to be inserted after it is engaged with the two support petals 3. The groove depth of the positioning groove 111 extends along the length direction of the connector 1. The positioning structure 4 includes a positioning block 41 fixedly connected to the circumferential groove wall of the positioning groove 111, a locking block 42 integrally formed on the side of the protrusion 32 away from the central shaft 2, and a fastener 43 installed on the circumferential outer wall of the connector 1. The limiting block and the locking block 42 correspond one-to-one. The protrusion 32 and the locking block 42 enter the positioning groove 111 through the two corresponding locking blocks 42. The fastener 43 engages with the corresponding locking block 42.

[0044] Reference Figure 2 , Figure 3 Fastener 43 is a positioning bolt that is threaded onto the circumferential outer wall of connector 1. The shank of the positioning bolt passes through connector 1 and can extend into positioning groove 111.

[0045] The implementation principle of the bearing outer ring removal device in Embodiment 1 of this application is as follows:

[0046] When removing the outer ring 8, multiple support petals 3 first pass through the outer ring 8, and then the central shaft 2 passes between the multiple support petals 3, so that the circumferential outer wall of the central shaft 2 fits against the side of the support petals 3 facing the central shaft 2. The central shaft 2 pushes the multiple support petals 3 outward, so that the side of the support petals 3 away from the central shaft 2 fits against the circumferential inner wall of the outer ring 8. Then, the positioning structure 4 realizes the fixed connection between the multiple support petals 3 and the connector 1. By pulling the connector 1, the outer edge 31 abuts against one end of the outer ring 8, thereby realizing the removal of the outer ring 8 from the blind hole or stepped hole by pulling the connector 1. The removal device replaces the traditional auxiliary tools, improving the convenience of disassembling the outer ring 8 and effectively shortening the disassembly time.

[0047] Example 2

[0048] Embodiment 2 of this application discloses a bearing outer ring removal device.

[0049] The difference between Example 2 and Example 1 is that: (Refer to...) Figure 4A movable plate 5 is movably connected within the positioning groove 111. The circumferential wall of the positioning groove 111 has two opposing relief grooves 113 extending along the groove depth direction, and two opposing spiral grooves 114 extending along the circumferential wall of the positioning groove 111. One end of each spiral groove 114 communicates with a relief groove 113, and the other end corresponds to a positioning bolt. A movable rod 51 is fixedly connected to the circumferential outer wall of the movable plate 5, slidingly connected within the relief grooves 113 and spiral grooves 114. The end of the movable rod 51 facing away from the movable plate 5 is hemispherical. A reset element 6, which drives the movable plate 5 to reset, is installed at the bottom of the positioning groove 111. The reset element 6 is a reset spring, with one end fixedly connected to the bottom of the positioning groove 111 and the other end abutting against the end face of the movable plate 5.

[0050] Reference Figure 5 , Figure 6 The positioning block 41 has a guide surface 411 at one end corresponding to the clearance groove 113. One end of the movable plate 5 is slidably connected to the abutment plate 7. The movable plate 5 is equipped with an elastic element 52 that drives the abutment plate 7 to move away from itself. The elastic element 52 is a connecting spring. One end of the connecting spring is fixedly connected to the movable plate 5 and the other end is fixedly connected to the abutment plate 7. The abutment plate 7 has a groove 71 at the end away from the movable plate 5 for the frustum 21 and the protrusion 32 to fit into after they cooperate.

[0051] The implementation principle of the bearing outer ring removal device in Embodiment 2 of this application is as follows:

[0052] When multiple support petals 3 are inserted into the positioning groove 111 together with the central shaft 2, the movable plate 5 abuts against the protrusion 32 and the frustum 21. The movable plate 5 moves in the direction of the positioning groove 111 under force, and the reset member 6 undergoes elastic deformation under force, ensuring the tendency of elastic reset. The movable rod 51 first slides along the relief groove 113. At this time, the movable plate 5 moves along the groove depth of the positioning groove 111. The movable rod 51 then slides along the spiral groove 114. At this time, the movable plate 5 moves along the groove depth of the positioning groove 111 while rotating around its own axis. While the movable plate 5 is rotating, it can also drive multiple support petals 3 and the central shaft 2 to rotate simultaneously or drive the connector 1 to rotate through friction. When the movable rod 51 moves to the end of the spiral groove 114 corresponding to the fastener 43, the locking block 42 abuts against the corresponding positioning block 41 on the side facing the groove opening of the positioning groove 111. The locking block 42 is aligned with the corresponding fastener 43, which facilitates the alignment of the locking block 42 and the fastener 43.

[0053] When multiple support petals 3 are inserted into the positioning groove 111 together with the central shaft 2, the abutment plate 7 is first subjected to force and moves towards the movable plate 5. The elastic element 52 is subjected to force and undergoes elastic deformation, and maintains the tendency of elastic reset. When the locking block 42 is aligned with the positioning block 41, the elastic element 52 abuts against the abutment plate 7, and the abutment plate 7 tends the locking block 42 to abut against the positioning block 41, which can achieve the initial fixation of multiple support petals 3, central shaft 2 and connector 1, and facilitate the fastener 43 to abut against the corresponding locking block 42.

[0054] The frustum 21 and the protrusion 32 are embedded in the groove 71. When the abutment plate 7 rotates under the action of the movable plate 5, it can facilitate the abutment plate 7 to drive multiple support petals 3 and the central shaft 2 to rotate simultaneously or drive the connector 1 to rotate. During use, only force needs to be applied in the direction of the groove depth of the positioning groove 111, which effectively reduces the force of rotating the connector 1 or rotating the support petals 3 and the central shaft 2 after they are engaged.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bearing outer race extractor apparatus, characterized by: The application relates to a connector (1), a middle shaft (2), at least two support petals (3) matched with the middle shaft (2) and arranged along the circumferential outer wall of the middle shaft (2), the middle shaft (2) is used for driving the support petals (3) to move in a direction away from the middle shaft (2), a positioning structure (4) for fixed connection between the support petals (3) and the connector (1) is arranged between the support petals (3) and the connector (1), and an outer edge part (31) is arranged on the side of the support petals (3) away from the middle shaft (2). The middle shaft (2) is axially provided with a circular truncated cone (21), and the support petals (3) are provided with protruding blocks (32) which are provided with stepped grooves (321) matched with the circumferential outer wall of the circular truncated cone (21). The connector (1) is provided with a positioning groove (111) for plugging after the middle shaft (2) is matched with all the support petals (3), the positioning structure (4) comprises positioning blocks (41) arranged on the circumferential groove wall of the positioning groove (111), clamping blocks (42) arranged on the side of the protruding blocks (32) away from the middle shaft (2) and fasteners (43) arranged on the connector (1), the positioning blocks (41) correspond to the clamping blocks (42) one by one, and the fasteners (43) are matched with the corresponding clamping blocks (42). The positioning groove (111) is provided with a movable plate (5), the circumferential groove wall of the positioning groove (111) is provided with a displacement groove (113) and a spiral groove (114), the displacement groove (113) extends along the groove depth direction of the positioning groove (111), one end of the spiral groove (114) is communicated with the displacement groove (113), the other end of the spiral groove (114) corresponds to the fastener (43), the movable plate (5) is provided with movable rods (51) slidably connected in the displacement groove (113) and the spiral groove (114), and the positioning groove (111) is provided with a reset member (6) for driving the movable plate (5) to reset.

2. The bearing outer race extractor of claim 1, wherein: The fastener (43) is a positioning bolt threadedly connected on the connector (1), and the rod part of the positioning bolt can extend into the positioning groove (111).

3. The bearing outer race extractor of claim 1, wherein: The connector (1) comprises a front part (11) and a rear part (12) arranged on the front part (11), the rear part (12) is provided with a connecting screw rod (121), and the positioning groove (111) is arranged on the front part (11).

4. The bearing outer race extractor of claim 3, wherein: The front part (11) is provided with a threaded hole (112), and the rear part (12) is provided with a threaded end (122) threadedly connected with the threaded hole (112).

5. The bearing outer race extractor of claim 1, wherein: One end of the positioning block (41) is provided with a guide surface (411).

6. The bearing outer race extractor of claim 1, wherein: The movable plate (5) is slidably connected with an abutting plate (7), and the movable plate (5) is provided with an elastic member (52) for driving the abutting plate (7) to move away from itself.

7. The bearing outer race extractor of claim 6, wherein: The abutting plate (7) is provided with an embedding groove (71) embedded after being matched with the circular truncated cone (21) and the protruding block (32).

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