Bearing dismounting device

Abstract

The utility model discloses a bearing dismounting device in the technical field of mechanical dismounting tool. Contain center disc, draw bar and jib, and draw bar and jib are all connected on center disc, every draw bar has the flange extending to one side, when multiple draw bars are connected on center disc, corresponding multiple flanges are distributed on the one side outward relative draw bar, and the outermost edge of multiple flanges is located on the same cylindrical lateral surface, and draw bar is configured as detachable connection with center disc or sliding connection with center disc, so as to facilitate the flange to form the abutment limit for the bearing in the cavity, when multiple jibs are connected on center disc, relative draw bar is distributed on the outside of center disc, and center disc is equipped with the screw hole, and the corresponding screw thread is equipped on the jib. Through the jib abutting the cavity outer wall of the additional draw bar outside, solve the problem that the center jib of puller cannot be used to pull the bearing, and the problem that the thin wall bearing outer ring is easy to unhook in dismounting, improve the maintenance efficiency of production line centrifugal equipment.

Description

Technical Field

[0001] This utility model relates to the field of mechanical disassembly and assembly tools, specifically to a bearing disassembly device. Background Technology

[0002] Sedimentation centrifuges, as solid-liquid separation equipment for cellulose ether products, are a crucial component of the material flow in the production line. The proper functioning of the equipment is a vital guarantee and prerequisite for the smooth and stable operation of the production line. When equipment malfunctions, repairs require rapid intervention. A key challenge in replacing centrifuge spiral bearings lies in disassembling the old bearing. When disassembling split roller or needle roller bearings, the inner and outer rings are separate, and the outer ring fits tightly with the inner bore. Because the bearing is installed inside the centrifuge cavity, the repair space is narrow, making it impossible for an angle grinder to enter the cavity for cutting. Even if cutting is possible, improper operation during the cutting process can easily damage the shaft bore. When using a puller to disassemble the bearing, the thickness of the outer ring (for bearings like NA4917, the outer ring thickness is around 10mm) prevents the formation of a clear step for the pull rod head to grip firmly, leading to easy loosening under stress. Furthermore, the deep inner bore of the centrifuge makes it impossible to use the center push rod of the puller to pull the bearing. To improve maintenance efficiency, reduce maintenance time, and ensure the smooth operation of the production line, it is urgent to solve the problem of disassembling the bearings inside the upper chamber of the centrifuge. Utility Model Content

[0003] To overcome the problem of inconvenient disassembly of the bearings inside the upper chamber of existing centrifuges, this utility model provides a bearing disassembly device.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] The bearing disassembly device includes a central disc, multiple tie rods, and multiple push rods. All tie rods and push rods are connected to the central disc. Each tie rod has a flange extending to one side. When multiple tie rods are connected to the central disc, the corresponding flanges are distributed on the outer side of the tie rods. The outermost edges of the flanges are located on the same cylindrical side surface. The tie rods are configured to be detachably connected to the central disc or slidably connected to the central disc, so that the flanges can abut and limit the bearing within the cavity. When multiple push rods are connected to the central disc, they are distributed on the outer side of the central disc relative to the tie rods. The central disc has threaded holes, and the push rods have corresponding threads.

[0006] In this invention, by adding a push rod on the outside of the pull rod to abut against the outer wall of the cavity, the problem of not being able to use the center push rod of the puller to pull the bearing, as well as the problem of easy disengagement when disassembling the outer ring of the thin-walled bearing, is solved. This improves the maintenance efficiency of the centrifugal equipment in the production line, reduces damage to the shaft hole by cutting and disassembling, shortens the maintenance time, ensures that the maintenance work can be completed on time, and guarantees the normal operation of the production line.

[0007] In some embodiments, a flange is provided at one end of the tie rod.

[0008] In some embodiments, when the pull rod is connected to the center plate, the flange is tilted relative to the pull rod toward the center plate, such that the flange and the pull rod form an angle of 80°-85°.

[0009] In some embodiments, the plurality of tie rods are configured to be evenly distributed around the circumference of the central disk.

[0010] In some embodiments, a plurality of push rods are configured to be evenly distributed around the circumferential position of the central disk.

[0011] In some embodiments, one end of the push rod is configured as a square head, and the square head of the push rod and the upper flange of the pull rod are disposed on different sides of the central disk.

[0012] In some embodiments, the pull rod is configured to be slidably connected to the central disk, and the sliding of the pull rod allows the outermost edges of multiple flanges to be located on the cylindrical side surfaces of different sizes.

[0013] In some embodiments, a tensioning member is also provided, which is disposed between multiple tie rods to generate an outward supporting force on the multiple tie rods.

[0014] In some embodiments, two tie rods are configured, and the tensioning element includes a mating internally threaded cylinder and a stud, which respectively abut against the two tie rods.

[0015] In some embodiments, there are two pull rods and two push rods, with the sliding direction of the two pull rods being the same and the line connecting the two threaded holes on the central plate for connecting the push rods being the same.

[0016] The beneficial effects of this utility model are:

[0017] By adding a push rod on the outside of the pull rod to abut against the outer wall of the cavity, the problem of not being able to use the center push rod of the puller to pull the bearing, as well as the problem of easy disengagement when disassembling the outer ring of the thin-walled bearing, is solved. This improves the maintenance efficiency of the centrifugal equipment on the production line, reduces damage to the shaft hole by cutting and disassembling, shortens maintenance time, ensures that maintenance work can be completed on time, and guarantees the normal operation of the production line. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the bearing disassembly device provided by this utility model;

[0019] Figure 2 A schematic diagram illustrating the application of the bearing disassembly device provided by this utility model;

[0020] Figure 3A schematic diagram of the central disc structure in the bearing disassembly device provided by this utility model.

[0021] The markings in the diagram are as follows: 1-top rod, 11-square head, 2-center disc, 21-threaded hole, 22-strip hole, 3-pull rod, 31-flange, 4-tensioning element, 41-internal threaded cylinder, 42-stud, 5-pull rod pin, 6-bearing, 7-cavity, 8-housing. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0024] like Figure 1-3 As shown, a bearing disassembly device provided by this utility model is specifically illustrated.

[0025] The bearing disassembly device includes a central disk 2, multiple pull rods 3, and multiple push rods 1. The pull rods 3 and push rods 1 are all connected to the central disk 2. Each pull rod 3 has a flange 31 extending to one side. When multiple pull rods 3 are connected to the central disk 2, the corresponding flanges 31 are distributed on the outer side relative to the pull rod 3. The outermost edges of the multiple flanges 31 are located on the same cylindrical side. The pull rods 3 are configured to be detachably connected to the central disk 2 or slidably connected to the central disk 2 so that the flanges 31 can form abutment and limit the bearing 6 in the cavity 7. When multiple push rods 1 are connected to the central disk 2, they are distributed on the outer side of the central disk 2 relative to the pull rods 3. The central disk 2 is provided with threaded holes 21, and the push rods 1 are provided with corresponding threads.

[0026] In this utility model, by adding a push rod 1 on the outside of the pull rod 3 to abut against the outer wall of the cavity 7, the problem of not being able to use the center push rod 1 of the puller to pull the bearing 6 and the problem of easy disengagement when disassembling the outer ring of the thin-walled bearing 6 are solved. This improves the maintenance efficiency of the centrifugal equipment in the production line, reduces the damage to the shaft hole by cutting and disassembling, shortens the maintenance time, ensures that the maintenance work can be completed on time, and ensures the normal operation of the production line.

[0027] In this embodiment, the main body of the pull rod 3 is made of 10*17*300mm flat steel.

[0028] In this embodiment, the central disk 2 has a diameter of 190mm and a thickness of 20mm.

[0029] The flanges 31 corresponding to the pull rod 3 are distributed on the side opposite to the pull rod 3, where "outer" means the side of the pull rod 3 away from other pull rods 3, so as to generate a disassembly force on the bearing 6 inside the cavity 7. The outermost edges of the multiple flanges 31 are located on the same cylindrical side surface so as to simultaneously abut against the inner wall of the cavity 7.

[0030] Multiple push rods 1 are distributed on the outer side of the central plate 2 relative to the pull rods 3, so that the push rods 1 can abut against the housing during the use of the bearing disassembly device.

[0031] The pull rod 3 can be configured to be detachably connected to the center plate 2, so that the flange 31 of the pull rod 3 limits the bearing 6 before connecting the pull rod 3 or the center plate 2; the pull rod 3 and the center plate 2 can be configured to be slidably connected, so that the pull rod 3 slides relative to the center plate 2, so that when the pull rod 3 enters the cavity 7, it avoids the bearing 6, so that it enters deeper into the cavity 7 and forms abutment and limit on the bearing 6; the pull rod 3 can also be configured to be detachably connected to the center plate 2, and after connection, the pull rod 3 can slide relative to the center plate 2.

[0032] In this embodiment, the flange 31 is disposed at one end of the pull rod 3.

[0033] Based on the contact and limiting between the flange 31 on the pull rod 3 and the bearing 6, in order to simplify the device structure and ensure the function, the flange 31 can be set at the end of the pull rod 3.

[0034] In this embodiment, when the pull rod 3 is connected to the central disk 2, the flange 31 is tilted relative to the pull rod 3 toward the central disk 2, so that the flange 31 and the pull rod 3 form an 85° angle.

[0035] This angle is designed to prevent the tie rod 3 from tilting and slipping during the actual pulling of the outer ring of the bearing 6, and to ensure better contact between the flange 31 and the bearing 6 on the force-bearing surface. The preferred angle range is 80°-85°.

[0036] In this embodiment, multiple tie rods 3 are configured to be evenly distributed around the central disk 2.

[0037] In this embodiment, multiple push rods 1 are configured to be evenly distributed around the central disk 2.

[0038] Both the pull rod 3 and the push rod 1 are evenly distributed in the circumference to balance the force and improve the performance of the device.

[0039] In this embodiment, one end of the push rod 1 is configured as a square head 11, and the square head 11 of the push rod 1 and the upper flange 31 of the pull rod 3 are disposed on different sides of the central disk 2.

[0040] By configuring it with a square head 11, it is easy to drive the rotation of the push rod 1, thereby facilitating the use of the bearing removal device.

[0041] In this embodiment, the pull rod 3 is configured to be slidably connected to the central disk 2. The sliding of the pull rod 3 can enable the outermost edges of multiple flanges 31 to be located on the cylindrical side surfaces of different sizes.

[0042] By configuring the connection between the pull rod 3 and the central disk 2 as a sliding connection, the process of the pull rod 3 extending into the cavity 7 during the bearing removal device can avoid obstructing the bearing 6; on the other hand, it can also adapt to different bearing 6 sizes. This improves the applicability of the device.

[0043] Specifically, in this embodiment, the connection limit between the pull rod 3 and the center plate 2 is achieved by the pull rod pin 5.

[0044] In this embodiment, the central disk 2 is symmetrically milled with two 21mm*50mm strip holes 22 for sliding connection of the tie rod 3, which can realize the distance adjustment of the flange 31 from 76mm to 176mm, that is, the outer diameter of the bearing 6 used for disassembly is 76mm-176mm, so as to meet the disassembly of bearings 6 of different models and sizes.

[0045] In this embodiment, a tensioning member 4 is also provided. The tensioning member 4 is disposed between multiple tie rods 3 and forms an outward supporting force on the multiple tie rods 3.

[0046] By setting tensioning element 4, the tie rod 3 is supported outwards, further preventing slippage and improving disassembly efficiency. Tensioning element 4 should be selected based on the structural adaptability of the tie rod 3, focusing on providing outward support force. Tensioning element 4 can be a telescopic component for easy adjustment. For practical application, it can be an elastic component or an adjustable rigid component.

[0047] In this embodiment, two pull rods 3 are configured, and the tensioning member 4 includes a threaded cylinder 41 and a stud 42 that cooperate with each other. The threaded cylinder 41 and the stud 42 respectively abut against the two pull rods 3.

[0048] Preferably, the simplified structure of the tie rod 3 is set to two. At this time, the structure of the tensioning member 4 can also be further simplified. Specifically, as described above, it is a combination of an internal threaded cylinder 41 and a stud 42. The distance between the two ends can be changed by rotation, and the adjustment is placed between the two tie rods 3.

[0049] In this embodiment, there are two pull rods 3 and two push rods 1. The sliding direction of the two pull rods 3 is the same, and the line connecting the two threaded holes 21 on the central plate 2 for connecting the push rods 1 is also the same.

[0050] Preferably, the simplified push rod 1 structure also consists of two rods, and the positions of the pull rod 3 and push rod 1 on the central plate 2 are arranged as described above to optimize the force on the central plate 2 and avoid damage to the central plate 2 during the use of the bearing disassembly device.

[0051] Specifically, in this embodiment, two M20 threaded holes 21 with a center distance of 160mm are used as the female threads of the push rod 1. The push rod 1 is provided with a corresponding threaded section to facilitate adjustment and pull-out operation when it abuts against the housing. Specifically, with the cooperation of the threaded holes 21 and the threaded section of the push rod 1, the pull rod 3 of the bearing disassembly device provides a reaction force to the outer ring of the bearing 6. By rotating the top head 11 of the push rod 1, the pull rod 3 drives the bearing 6 to move outward, so as to facilitate the disassembly of the bearing 6 in the cavity 7.

[0052] The installation and use process of this device:

[0053] Place the two pull rods 3 into the bearing 6, with the flanges 31 opening outwards to form symmetry. After they are placed into the cavity 7 to a certain depth, pull the pull rods 3 outwards until the flanges 31 contact the outer ring end face of the bearing 6.

[0054] Place the tensioner 4 at a suitable position between 150mm and 200mm from the flange 31, and adjust the stud 42 on the tensioner 4 so that both ends of the tensioner 4 slightly act on the two pull rods 3 to ensure that the pull rods 3 do not slip under stress.

[0055] Then install the center plate 2, pass the center plate 2 through the tie rod 3, and install the tie rod through pin 5 to connect the limit tie rod 3 and the center plate 2. Install the push rod 1, rotate the push rod 1 into the M20 threaded hole 21 of the center plate 2, and rotate the push rod 1 so that the push rod 1 contacts the machine housing.

[0056] Increase the preload of tensioner 4 appropriately by rotating it half a turn along the elongation direction to increase the tension. The bearing disassembly device is now basically assembled.

[0057] After completing the aforementioned assembly, check whether the bearing disassembly device and bearing 6 are strained. You can gently rotate the device to see if there is any looseness. If there is no looseness, proceed to the next step.

[0058] After confirming that the bearing removal device is installed in place, use an adjustable wrench or pipe wrench to rotate the square head 11 of the push rod 1. With both push rods 1 exerting force, the push rod 1 generates a force on the end face of the housing, which is transmitted to the outer ring of the bearing 6 through the pull rod 3, forming an outward pulling force. Gradually, the outer ring of the bearing 6 is slowly moved to one side of the end face of the housing until the outer ring of the bearing 6 is pulled out.

[0059] The beneficial effects of this utility model are: the bearing disassembly device can effectively disassemble the bearing 6, which solves the problem of the conventional tensioner having no apex in the middle and the problem of easy disengagement when disassembling the outer ring of the thin-walled bearing 6. It improves the maintenance efficiency of the centrifugal equipment in the production line, reduces the damage to the shaft hole by cutting and disassembling, shortens the maintenance time, ensures that the maintenance work can be completed on time, and ensures the normal operation of the production line.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bearing disassembly device, characterized in that: It includes a central plate (2), multiple tie rods (3) and multiple push rods (1), with the tie rods (3) and push rods (1) all connected to the central plate (2); Each pull rod (3) has a flange (31) extending to one side. When multiple pull rods (3) are connected to the central disk (2), the corresponding flanges (31) are distributed on the side opposite to the pull rod (3). The outermost edges of the multiple flanges (31) are located on the same cylindrical side. The pull rod (3) is configured to be detachably connected to the central disk (2) or slidably connected to the central disk (2) so that the flange (31) can form abutment limit on the bearing (6) inside the cavity (7). When multiple push rods (1) are connected to the central plate (2), they are distributed on the outside of the central plate (2) relative to the tie rod (3). The central plate (2) is provided with threaded holes (21), and the push rods (1) are provided with corresponding threads.

2. The bearing disassembly device as described in claim 1, characterized in that: The flange (31) is located at one end of the tie rod (3).

3. The bearing disassembly device as described in claim 1, characterized in that: When the pull rod (3) is connected to the center plate (2), the flange (31) is tilted relative to the pull rod (3) toward the center plate (2), so that the flange (31) and the pull rod (3) form an angle of 80°-85°.

4. The bearing disassembly device as described in claim 1, characterized in that: Multiple tie rods (3) are configured to be evenly distributed around the central disk (2).

5. The bearing disassembly device as described in claim 1, characterized in that: Multiple push rods (1) are configured to be evenly distributed around the central disk (2).

6. The bearing disassembly device as described in claim 1, characterized in that: One end of the push rod (1) is configured as a square head (11), and the upper flange (31) of the push rod (1) and the upper flange (31) of the pull rod (3) are set on different sides of the central plate (2).

7. The bearing disassembly device as described in any one of claims 1-6, characterized in that: The pull rod (3) is configured to slide on the central disk (2), and the sliding of the pull rod (3) can realize that the outermost edge of multiple flanges (31) is located on the cylindrical side surface of different sizes.

8. The bearing disassembly device as described in claim 7, characterized in that: A tensioning element (4) is also provided, which is arranged between multiple tie rods (3) to form an outward supporting force on the multiple tie rods (3).

9. The bearing disassembly device as described in claim 8, characterized in that: The pull rod (3) is configured as two, and the tensioning member (4) includes a threaded inner cylinder (41) and a stud (42) that cooperate with each other. The threaded inner cylinder (41) and the stud (42) respectively abut against the two pull rods (3).

10. The bearing disassembly device as described in claim 7, characterized in that: There are two pull rods (3) and two push rods (1). The sliding direction of the two pull rods (3) is the same, and the line connecting the two threaded holes (21) on the center plate (2) for connecting the push rods (1) is the same.

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