Bearing dismounting device and roll shaft assembly

Abstract

According to the bearing dismounting device and the roller shaft assembly, a spline rod abuts against the end of a roller shaft, a screw rod is rotated, the screw rod moves relative to a fixing plate under the action of a first thread, the spline rod moves relative to a spline limiting block under the action of a second thread, and due to the fact that a lifting guide groove and a limiting strip are arranged in a matched mode, the bearing dismounting effect is good. Therefore, the spline rod can only do linear motion along the axial direction of the spline rod. Due to the fact that the pitch of the first thread is different from that of the second thread, the moving distance of the spline rod is the differential pitch of the first thread and the second thread, when the differential pitch is very small, the screw rotates by one circle, and the spline rod only moves by a very small distance, the spline rod can push the roller shaft at a relatively slow speed, and the roller shaft is driven to rotate. The roller shaft and the bearing are disassembled in a stable mode, and damage to parts is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical equipment maintenance field, concretely relates to a bearing dismounting device and roller shaft assembly. BACKGROUND

[0002] In order to keep the equipment stable and prolong the service life of the equipment, the equipment needs to be maintained and repaired regularly, and the dismounting of the rolling bearing is an important and common operation. The conventional dismounting method includes knocking method, using puller tool (such as three-jaw or two-jaw puller) and hot dismounting method. Although the knocking method is simple and easy to operate, it is easy to cause damage to the inner ring and rolling body of the bearing, and this method is not universal. The puller tool needs enough space to hook the outer ring of the bearing when in use, but due to the difference in the action area when dismounting the self-aligning ball bearing, the bearing is easy to be damaged, and the puller tool is difficult to play a role in this case. The hot dismounting method involves heating the bearing or its matching part to loosen and dismount the bearing by using the principle of thermal expansion, but it needs to strictly control the heating temperature and protect the adjacent parts to avoid thermal damage. The above methods have limitations and are easy to cause damage to the equipment, especially in the maintenance occasions with high precision requirements. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the utility model provides a bearing dismounting device and roller shaft assembly, which can solve the problem that the existing dismounting method is easy to cause damage to the parts.

[0004] The utility model solves the technical scheme that adopts: on the one hand, provide a kind of bearing dismounting device, including screw rod, fixed part, spline limit block and spline rod;The fixed part is used to fix bearing, and the fixed part includes fixed plate, the fixed plate is provided with first through-hole, the first through-hole is provided with first screw thread, and the screw rod is connected with the first screw thread;The spline limit block is installed on the fixed plate, and the spline limit block is provided with lifting channel, and the screw rod is matched with the lifting channel gap;The inner wall of the lifting channel is provided with lifting guide groove, the outer wall of the spline rod is provided with limit strip, the limit strip is connected with the lifting guide groove slidingly, the middle of the spline rod is provided with second through-hole, the second through-hole is provided with second screw thread, and the screw rod is connected with the second screw thread, the rotation direction of the first screw thread and the second screw thread is consistent, and the pitch of the first screw thread is greater than the pitch of the second screw thread, or the pitch of the first screw thread is less than the pitch of the second screw thread.

[0005] As a further improvement of the above technical solution, the fixed part further includes an abutment plate and a plurality of connecting columns, and the plurality of connecting columns are connected between the abutment plate and the fixed plate;

[0006] The abutting plate is provided with a biasing hole and a positioning hole, the biasing hole is communicated with the positioning hole, and the diameter of the biasing hole is larger than that of the positioning hole.

[0007] As a further improvement of the above technical solution, the abutting plate is provided with a rotatingly connected buckle plate, one end of the buckle plate is provided with a notch, and the edge curvature of the notch is the same as that of the positioning hole.

[0008] As a further improvement of the above technical solution, the surface of the abutting plate facing the fixed plate is provided with a limiting groove, and the buckle plate is rotatingly connected in the limiting groove.

[0009] As a further improvement of the above technical solution, the outer side of the connecting column is provided with a clamping groove, and the two ends of the connecting column are respectively screwed with the fixed plate and the abutting plate.

[0010] As a further improvement of the above technical solution, the end of the screw rod close to the fixed plate is provided with an abutting block, and the cross-sectional area of the abutting block is larger than that of the first through hole.

[0011] As a further improvement of the above technical solution, the abutting block is connected with a rotating rod, and the axial direction of the rotating rod is horizontal.

[0012] As a further improvement of the above technical solution, the abutting block is provided with a connecting hole, the rotating rod includes a rod body and a cap body, the rod body is arranged in the connecting hole, and the cap body is limited at one end of the connecting hole.

[0013] As a further improvement of the above technical solution, one end of the spline limiting block close to the fixed plate is provided with a gasket, and the gasket is connected with the fixed plate through a bolt.

[0014] On the other hand, a roller shaft assembly is also provided, which comprises a roller shaft, a bearing, and the bearing dismounting device, the end of the roller shaft is connected with the bearing, and the spline rod abuts against the end of the roller shaft.

[0015] The utility model discloses beneficial effect is: through the spline rod with the end of roller axle abutment, and rotate screw, under the action of first thread, screw moves relative to fixed plate, under the action of second thread, spline rod moves relative to spline limit block, because the inner wall of lift channel is provided with lift guide groove, and the outer wall of spline rod is provided with limit strip, and limit strip and lift guide groove slide connection make the rotation of spline rod be restricted, can only linear motion along its axial direction. Because the rotation of first thread and second thread is consistent, and the pitch of first thread is greater than the pitch of second thread, or, the pitch of first thread is less than the pitch of second thread, and the pitch of first thread is different with the pitch of second thread, and the moving distance of spline rod is the differential pitch of first thread and second thread, when the differential pitch is very small, and screw rotates a circle, and spline rod only moves very small distance, therefore, spline rod can push roller axle with relatively slow speed, with a stable mode realizes the disassembly of roller axle and bearing, avoids the damage to component, is applicable to the maintenance occasion of high-precision bearing. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model is further explained below in combination with the drawings and examples.

[0017] Figure 1 It is the structure schematic diagram of roller axle subassembly that the utility model provides preferred embodiment is provided with the spline limit block 3, the spline rod 4, the roller axle 5 and the bearing 6.

[0018] Figure 2 It is the sectional view of roller axle subassembly that the utility model provides preferred embodiment is provided with the spline limit block 3, the spline rod 4, the roller axle 5 and the bearing 6.

[0019] Figure 3 It is the exploded schematic diagram of bearing dismounting device that the utility model provides preferred embodiment is provided with the spline limit block 3, the spline rod 4, the roller axle 5 and the bearing 6.

[0020] Figure 4 It is the structure schematic diagram of bearing dismounting device that the utility model provides preferred embodiment is provided with the spline limit block 3, the spline rod 4, the roller axle 5 and the bearing 6.

[0021] Figure 5 It is the sectional view of bearing dismounting device that the utility model provides preferred embodiment is provided with the spline limit block 3, the spline rod 4, the roller axle 5 and the bearing 6.

[0022] Sign significance: 1, screw, 2, fixed piece, 3, spline limit block, 4, spline rod, 5, roller axle, 6, bearing;

[0023] 11, abutment block, 12, rotating lever, 21, fixed plate, 22, abutment plate, 23, connecting column, 31, gasket, 32, lift channel, 41, limit strip, 42, second through-hole;

[0024] 111, connecting hole, 121, rod body, 122, cap body, 211, first through-hole, 221, biasing hole, 222, positioning hole, 223, buckle plate, 224, notch, 225, limit slot, 231, clamping groove, 321, lift guide groove. Detailed Implementation

[0025] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0026] Please see Figure 1 This utility model provides a bearing disassembly device, including a screw 1, a fixing member 2, a spline limiting block 3 and a spline rod 4. The fixing member 2 is used to fix the bearing 6. The screw 1 is used to drive the spline rod 4 to move relative to the spline limiting block 3, so that the spline rod 4 pushes the roller shaft 5 and separates the roller shaft 5 from the bearing 6. The spline limiting block 3 is used to restrict the rotation of the spline rod 4, so that the spline rod 4 only moves axially.

[0027] Specifically, the fastener 2 includes a fixed plate 21, an abutment plate 22, and several connecting posts 23. The several connecting posts 23 are all connected between the abutment plate 22 and the fixed plate 21. During the disassembly of the bearing 6, the abutment plate 22 and the fixed plate 21 remain fixed in place.

[0028] Please refer to Figure 2 Furthermore, the fixing plate 21 is provided with a first through hole 211, and the first through hole 211 is provided with a first thread (not shown in the figure). The screw 1 is screwed to the first thread. By rotating the screw 1, the screw 1 can be moved relative to the fixing plate 21.

[0029] Please see Figure 3 and Figure 4The abutment plate 22 is provided with an offset hole 221, a positioning hole 222, and a buckle plate 223 for rotatable connection. The offset hole 221 communicates with the positioning hole 222, and the diameter of the offset hole 221 is larger than the diameter of the positioning hole 222. One end of the buckle plate 223 is provided with a notch 224, and the edge curvature of the notch 224 is the same as the edge curvature of the positioning hole 222. The buckle plate 223 can be rotated out first, and the bearing 6 can be passed through the offset hole 221, and then the roller shaft 5 can be passed through. After passing through the positioning hole 222, the buckle plate 223 is finally rotated in, ensuring that the edge of the notch 224 and the edge of the positioning hole 222 form a circle. The bearing 6 abuts against both the abutment plate 22 and the buckle plate 223, completing the initial work of disassembling the bearing 6. The setting of the offset hole 221 makes the device more convenient to use. The buckle plate 223 can form a complete circle with the abutment plate 22 to evenly support the bearing 6, which helps to ensure the stability of the subsequent disassembly process of the bearing 6.

[0030] Please see Figure 3 Furthermore, the surface of the abutment plate 22 facing the fixed plate 21 is provided with a limiting groove 225, and the buckle plate 223 is rotatably connected in the limiting groove 225. The surface of the buckle plate 223 can be flush with the surface of the abutment plate 22, so that the bearing 6 can simultaneously abut against the buckle plate 223 and the abutment plate 22, so that the bearing 6 can remain stable, and further facilitate the disassembly of the bearing 6 from the roller shaft 5.

[0031] Please see Figure 1 Each of the connecting posts 23 has a slot 231 on its outer side. The two ends of the connecting post 23 are screwed to the fixing plate 21 and the abutment plate 22 respectively. The connecting post 23 can be rotated relatively easily through the slot 231, which facilitates the connection of the connecting post 23 with the fixing plate 21 and the abutment plate 22.

[0032] Please see Figure 2 The end of the screw 1 near the fixed plate 21 is provided with an abutment block 11. The cross-sectional area of ​​the abutment block 11 is larger than the cross-sectional area of ​​the first through hole 211. The abutment block 11 can play a limiting role. When the abutment block 11 abuts against the fixed plate 21, it is the limit of the rotation of the screw 1.

[0033] The abutment block 11 is connected to a rotating rod 12. The axis of the rotating rod 12 is horizontal. Rotating the rotating rod 12 with the abutment block 11 as the origin will drive the screw 1 to rotate. The rotating rod 12 is easy to grip and easy to use.

[0034] Specifically, the abutment block 11 is provided with a connecting hole 111, and the rotating rod 12 includes a rod body 121 and a cap body 122. The rod body 121 passes through the connecting hole 111, and the cap body 122 is limited to one end of the connecting hole 111. The cap body 122 prevents the rod body 121 from coming out from one side. The rod body 121 and the cap body 122 are integrally formed, so that the entire rotating rod 12 is firmly connected to the abutment block 11.

[0035] Please seeFigure 2 The spline limit block 3 is installed on the fixed plate 21. Specifically, a gasket 31 is provided at one end of the spline limit block 3 near the fixed plate 21. The gasket 31 is connected to the fixed plate 21 by bolts. The structure is simple, strong and reliable.

[0036] The spline limit block 3 is provided with a lifting channel 32. The screw 1 is in clearance fit with the lifting channel 32. The spline limit block 3 does not restrict the screw 1, and the screw 1 can rotate within the lifting channel 32.

[0037] Please see Figure 5 The inner wall of the lifting channel 32 is provided with a lifting guide groove 321, and the outer wall of the spline rod 4 is provided with a limit strip 41. The limit strip 41 is slidably connected to the lifting guide groove 321. Please refer to [link / reference]. Figure 2 The spline rod 4 has a second through hole 42 in the middle, and the second through hole 42 has a second thread (not shown in the figure). The screw rod 1 is screwed to the second thread. Under the action of the second thread, the spline rod 4 moves relative to the spline limiting block 4. Due to the cooperation between the limiting strip 41 and the lifting guide groove 321, the rotation of the spline rod 4 is restricted, and it can only move linearly along its axis.

[0038] The first and second threads have the same direction of rotation, and the pitch of the first thread is greater than that of the second thread, or the pitch of the first thread is less than that of the second thread. The pitches of the first and second threads are different. The moving distance of the spline rod 4 is the differential pitch of the first and second threads. When the differential pitch is very small, the spline rod 4 moves only a very small distance when the screw 1 rotates one revolution. Therefore, the spline rod 4 can push the roller 5 at a relatively slow speed to achieve the disassembly of the roller 5 and the bearing 6 in a stable manner, avoiding damage to the components. This is suitable for maintenance of high-precision bearings.

[0039] A preferred embodiment of this utility model also provides a roller assembly, including a roller 5, a bearing 6, and the bearing disassembly device described in the above embodiment. The end of the roller 5 is connected to the bearing 6, and the spline rod 4 abuts against the end of the roller 5. The bearing 6 is located between the fixing plate 21 and the abutment plate 22, and the bearing 6 abuts against the abutment plate 22. The end of the roller 5 passes through the positioning hole 222. The roller 5 is pushed by the spline rod 4 at a relatively slow speed to achieve the disassembly of the roller 5 and the bearing 6 in a stable manner, avoiding damage to the components. This is suitable for the maintenance of high-precision bearings.

[0040] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A bearing disassembly device, characterized in that: The device includes a screw, a fixing component, a splined limiting block, and a splined rod. The fixing component is used to fix the bearing and includes a fixing plate with a first through hole and a first thread. The screw is screwed to the first thread. The splined limiting block is mounted on the fixing plate and has a lifting channel. The screw is clearance-fitted to the lifting channel. The inner wall of the lifting channel has a lifting guide groove, and the outer wall of the splined rod has a limiting strip that is slidably connected to the lifting guide groove. The splined rod has a second through hole with a second thread, and the screw is screwed to the second thread. The first thread and the second thread have the same direction of rotation, and the pitch of the first thread is greater than the pitch of the second thread, or the pitch of the first thread is less than the pitch of the second thread.

2. The bearing disassembly device according to claim 1, characterized in that: The fastener also includes an abutment plate and a plurality of connecting posts, wherein the plurality of connecting posts are connected between the abutment plate and the fastening plate; The abutment plate is provided with an offset hole and a positioning hole. The offset hole is connected to the positioning hole, and the diameter of the offset hole is larger than the diameter of the positioning hole.

3. The bearing disassembly device according to claim 2, characterized in that: The abutment plate is provided with a rotatably connected buckle plate, and one end of the buckle plate is provided with a notch, the curvature of the edge of the notch being the same as the curvature of the edge of the positioning hole.

4. The bearing disassembly device according to claim 3, characterized in that: The surface of the abutment plate facing the fixing plate is provided with a limiting groove, and the buckle plate is rotatably connected to the limiting groove.

5. The bearing disassembly device according to claim 2, characterized in that: Each of the connecting posts has a slot on its outer side, and both ends of the connecting post are screwed to the fixing plate and the abutment plate, respectively.

6. The bearing disassembly device according to claim 1, characterized in that: An abutment block is provided at the end of the screw near the fixed plate, and the cross-sectional area of ​​the abutment block is larger than the cross-sectional area of ​​the first through hole.

7. The bearing disassembly device according to claim 6, characterized in that: The abutment block is connected to a rotating rod, and the axis of the rotating rod is horizontal.

8. The bearing disassembly device according to claim 7, characterized in that: The abutment block is provided with a connecting hole, and the rotating rod includes a rod body and a cap body. The rod body passes through the connecting hole, and the cap body is limited to one end of the connecting hole.

9. The bearing disassembly device according to claim 1, characterized in that: A gasket is provided at one end of the spline limiting block near the fixed plate, and the gasket is connected to the fixed plate by bolts.

10. A roller assembly, characterized in that: It includes a roller, a bearing, and a bearing removal device as described in any one of claims 1-9, wherein the end of the roller is connected to the bearing, and the spline bar abuts against the end of the roller.

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