A bearing withdrawal auxiliary device

Abstract

This utility model discloses a bearing removal auxiliary device, comprising a base with support rods arranged opposite each other on both sides of the base. One end of each support rod is connected to the base, and the other end is fitted with a pressure plate and an adjusting block. The base, support rods, and pressure plate form a receiving space for a bearing housing. The base has mounting holes for accommodating the main shaft of a hydraulic device. One end of the main shaft is connected to a top plate, which moves up and down to eject the bearing mounted on the bearing housing. The device employs a top-pressing method to disassemble the bearing. By changing the downward pressing method to an upward pushing method, the bearing is ejected using a hydraulic device and tooling. The removal device eliminates the bearing housing flipping process, significantly improving operational safety. Simultaneously, it reduces the step of placing a pad, making bearing retrieval more convenient and greatly improving operational efficiency.

Description

Technical Field

[0001] This utility model relates to a bearing removal auxiliary device, belonging to the field of locomotive traction motor disassembly and maintenance technology. Background Technology

[0002] Bearing removal methods vary depending on the bearing's structure, size, and fit. Common methods include: 1) Impact removal: Using the impact energy generated by striking a copper rod or soft iron with a hammer to remove the bearing. 2) Pulling method: For bearings with high precision, where hammering is not allowed, or where disassembly is not possible, the pulling method should be used, requiring a specialized puller. 3) Pressing method: Using mechanical presses, hydraulic presses, or jacks, etc., for disassembly, mainly suitable for interference fit bearings. 4) Temperature difference method: Utilizing the thermal expansion and contraction properties of materials, heating the housing components causes the mating parts to lose their interference fit under temperature difference conditions, thus achieving disassembly. 5) Destructive method: If the bearing is seized to the shaft, housing, or sleeve, or if the secondary components are damaged to preserve the main components, destructive disassembly methods such as cutting can be used.

[0003] A method for removing the bearing of a locomotive traction motor is the top-pressing method. The structure and installation of this device are shown in the diagram. Figure 1 As shown, the operation method is as follows: 1. Place a pad (400) on the hydraulic device operating platform; 2. Manually flip the bearing seat (4) so ​​that the bearing chamber faces downward and is placed flat on the surface of the pad (400); 3. Adjust the bearing seat so that the center of the bearing chamber is aligned with the main shaft of the hydraulic device; 4. Start the hydraulic device, raise the main shaft to a certain position, put in the semi-circular block (200), and lower the main shaft to press out the bearing (100); 5. After manually flipping the bearing seat, put it in the designated place, raise the main shaft and take out the semi-circular block (200); 6. Lower the main shaft and take out the removed bearing (100).

[0004] The following disadvantages exist when using existing technical solutions for bearing removal: 1. A shim needs to be placed every time the bearing is removed, and the placement requires manual judgment. If the placement is not reasonable, the bearing housing needs to be moved to adjust the shim, which is inefficient.

[0005] 2. The process of manually flipping the bearing housing requires the operator to have considerable strength. After dozens of operations, there is a great deal of physical exertion. In addition, the grease spilled on the surface of the bearing housing during disassembly can easily cause fingers to slip, resulting in accidents such as bumps and detachment.

[0006] 3. After the bearing is removed, it is inconvenient to pick it up. The spindle cannot be lowered below the platform surface. The bearing needs to be picked up by hand by grasping the inner hole of the bearing and lifting it upwards, which is quite laborious.

[0007] A search revealed that CN202421835112.4 discloses a method using tooling and a jack to pull out the bearing housing. The connecting plate is bolted to the bearing housing, and the pull plate's edge is engaged with the inner end face of the U-shaped groove of the connecting plate. A hollow jack applies an outward lifting force, which is sequentially transmitted to the pull plate and the connecting plate, thus removing the bearing housing. However, this structure cannot solve the problems arising from the aforementioned operation of removing the locomotive traction motor bearing.

[0008] Therefore, inventing a bearing removal auxiliary device suitable for locomotive traction motor bearing removal has significant practical and economic value. Utility Model Content

[0009] This utility model addresses the shortcomings of existing technologies by proposing a bearing removal auxiliary device. It employs a top-pressing method to disassemble the bearing, changing the downward pressing method to an upward pushing method. With the help of a hydraulic device and tooling, the bearing is pushed out. The removal device eliminates the bearing housing flipping process, significantly improving operational safety. At the same time, it reduces the step of placing the pad, making bearing retrieval more convenient and greatly improving operational efficiency.

[0010] The technical means adopted by this utility model to solve the above problems are as follows: A bearing removal auxiliary device is disclosed, comprising a base, with support rods arranged opposite to each other on both sides of the base. One end of each support rod is connected to the base, and the other end is fitted with a pressure plate and an adjusting block. The base, support rods, and pressure plate form a receiving space for a bearing seat. The base is provided with a mounting hole for accommodating the main shaft of a hydraulic device. One end of the main shaft is connected to a top plate, which drives the top plate to extend and retract vertically to eject the bearing mounted on the bearing seat.

[0011] The bearing removal auxiliary device of this utility model changes the original downward pressing method to upward pushing. The bearing seat does not need to be flipped and is placed directly on the base. The pressure plate presses on the surface of the bearing seat, and the main shaft of the hydraulic device with the top plate is used to apply an upward lifting force, thereby removing the bearing.

[0012] The entire device has a simplified structure, high working efficiency, and is easy to use. It eliminates the need for flipping steps and adjusting pads, making bearing pickup easier and significantly improving safety and convenience.

[0013] Furthermore, the base is a disc-shaped structure with a central mounting hole. Positioning bosses are provided on both sides of the mounting hole. Each positioning boss comprises an annular body formed by an inner and outer side wall, and its top end abuts against the end face of the bearing seat. A positioning cavity is formed inside the positioning boss to accommodate the main shaft of the hydraulic device. A working platform for bearing retraction is designed on the base. The base has several threaded holes for hoisting and installing support rods. The upper part of the base is hollowed out to prevent interference between the bearing seat and the base. Several threaded holes are provided at the bottom of the base for connecting and fixing to the hydraulic device.

[0014] Furthermore, the positioning boss is concentrically positioned with the mounting hole, and the inner diameter of the annular body is larger than the outer diameter of the top plate. The base is provided with a circular positioning boss to ensure accurate positioning during installation.

[0015] Furthermore, the positioning boss and the edge of the base form a concave groove structure to accommodate and position the bearing seat.

[0016] Furthermore, the support rod includes a rod body and connecting ends at both ends of the rod body, the cross-section of which is smaller than the cross-section of the rod body. A support rod is designed to support the pressure plate and install the adjusting block; both ends of the support rod are threaded for connection, fixation, and height adjustment.

[0017] Furthermore, the pressure plate includes two semi-circular plates of the same size; each semi-circular plate includes a plate body and edge connecting portions disposed at both ends of the plate body; the edge connecting portions of the pressure plate are stacked and abut against each other; a step portion is provided on the side of the plate body near the bearing seat, the inner diameter of the step portion is larger than the outer diameter of the stage of the bearing seat that abuts against the step portion; the height of the step portion is smaller than the height of the stage of the bearing seat.

[0018] Furthermore, the pressure plate includes separate upper and lower pressure plates, which form a semi-circular opening for easy opening and closing. The total height of the edge connection portion of the upper and lower pressure plates is the same as the longitudinal section height of the plate body.

[0019] Furthermore, the top plate is a stepped cylinder, the maximum outer diameter of which is smaller than the inner diameter of the bearing housing's central hole, and the outer diameter at the step is smaller than the inner diameter of the bearing. The top plate is designed to transmit the lifting force to the bearing.

[0020] Furthermore, the adjusting block is a cylindrical block with internal threads, and the minimum distance between the outer diameter of the adjusting block and the center of the hydraulic device spindle is greater than the outer diameter of the bearing seat. The adjusting block is designed to adjust the height of the pressure plate mounted on the support rod; the adjusting block is provided with threaded holes for fastening and connecting with the support rod.

[0021] The bearing removal auxiliary device of this utility model includes the following steps: the base is fastened to the plane of the hydraulic device, the bearing seat does not need to be flipped, and is placed directly on the base. The positioning boss is used to achieve automatic alignment with the main shaft of the hydraulic device. The pressure plate is closed and pressed against the surface of the bearing seat. The main shaft of the hydraulic device is started to apply an upward lifting force to push the bearing out and remove the bearing. The pressure plate is released and the bearing seat is rotated away.

[0022] Compared with the prior art, the beneficial effects of this utility model are: This invention employs a top-pressing method to disassemble the bearing. By designing a bearing removal device, the downward pressing method is changed to an upward pushing method, using a hydraulic device and tooling to push the bearing out. 1) The exit device eliminates the bearing housing flipping issue, significantly improving operational safety; 2) The step of placing the pad is reduced, making it easier to pick up the bearing and greatly improving work efficiency; 3) The tooling structure is simple, easy to operate, and has a relatively low manufacturing cost; 4) The amount of manual, high-intensity work has been significantly reduced, and employee health has been protected; 5) It can be disassembled from other similar structures and has a wide range of applications. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an existing bearing withdrawal device.

[0024] Figure 2 This is a schematic diagram of the overall structure of the bearing withdrawal device described in this utility model.

[0025] Figure 3 This is a schematic diagram of the base of the bearing withdrawal device described in this utility model.

[0026] Figure 4 for Figure 3 A cross-sectional view of the base of the bearing withdrawal device along direction AA.

[0027] Figure 5 This is a schematic diagram of the support rod of the bearing withdrawal device described in this utility model.

[0028] Figure 6 This is a schematic diagram of the pressure plate of the bearing withdrawal device described in this utility model.

[0029] Figure 7 This is a cross-sectional view of the pressure plate of the bearing withdrawal device of this utility model along the BB direction.

[0030] Figure 8 This is a schematic diagram of the top plate of the bearing withdrawal device of this utility model.

[0031] Figure 9 This is a schematic diagram of the structure of the adjusting block of the bearing withdrawal device described in this utility model.

[0032] Among them, 1-base, 2-support rod, 3-pressure plate, 4-bearing seat, 5-hydraulic device spindle, 6-adjusting block, 7-top plate, 8-groove structure, 9-positioning boss, 11-mounting hole, 21-rod body, 22-connecting end, 31-plate body, 32-edge connection part, 33-step part, 41-step, 91-inner side wall, 92-outer side wall, 93-positioning cavity, 100-bearing, 200-semi-circular block, 400-pad block. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings. The drawings are for illustrative purposes only, representing schematic diagrams only, not actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Example 1

[0034] like Figure 2 As shown, the bearing removal auxiliary device of this embodiment includes a base 1. The base 1 is a disc-shaped structure with a central mounting hole 11, serving as a working platform for the removal of the bearing 100. The base 1 also functions as a positioning and connecting element. Support rods 2 are arranged opposite each other on both sides of the base 1. One end of each support rod 2 is connected to the base 1, and the other end is fitted with a pressure plate 3 and an adjusting block 6. The adjusting block 6 is mounted on the pressure plate 3 and, together with the pressure plate 3, is fitted onto the external thread of the support rod 2. This design allows the base 1, support rods 2, and pressure plate 3 to enclose a space for the bearing seat 4; therefore, the volume of the entire space must be greater than the volume of the bearing seat 4 to be removed.

[0035] like Figures 3-4 As shown, in order to facilitate installation, make effective use of space, and make the whole equipment easy to use, a mounting hole 11 is provided on the base 1 to accommodate the hydraulic device spindle 5. One end of the hydraulic device spindle 5 is connected to the top plate 7, which drives the top plate 7 to extend and retract up and down to push out the bearing 100 installed on the bearing seat 4.

[0036] like Figure 5 As shown, the support rod 2 includes a rod body 21 and connecting ends 22 that connect both ends of the rod body 21. The cross-section of the connecting ends 22 is smaller than the cross-section of the rod body 21. In this embodiment, the support rod 2 is designed to support the pressure plate 3 and install the adjustment block 6, acting as a frame. The support rod 2 has threads at both ends for connection, fixation, and height adjustment.

[0037] The mounting hole 11 is designed with a hollowed-out upper part of the base 1 to avoid interference between the bearing seat 4 and the base 1. Positioning bosses 9 are provided on both sides of the mounting hole 11. Each positioning boss 9 comprises an annular body formed by an inner wall 91 and an outer wall 92. The top of the positioning boss 9 abuts against the end face of the bearing seat 4. A positioning cavity 93 is formed inside the positioning boss 9 to accommodate the hydraulic device spindle 5. The positioning boss 9 is concentrically positioned with the mounting hole 11, and the inner diameter of the annular body is larger than the outer diameter of the top plate 7. The positioning boss 9 and the edge of the base form a concave groove structure 8 to accommodate and position the bearing seat 4. In this embodiment, the base 1 is provided with a circular positioning boss, and several threaded holes are provided at the bottom of the base for connection and fixation with the hydraulic device.

[0038] like Figures 6-7 As shown, the pressure plate 3 in this embodiment includes two semi-circular plates of the same size; each semi-circular plate includes a plate body 31 and edge connecting portions 32 disposed at both ends of the plate body 31; the edge connecting portions 32 of the pressure plate 3 are stacked and abut against each other; a step portion 33 is provided on the side of the plate body near the bearing seat 4, the inner diameter of the step portion 31 is larger than the outer diameter of the step 41 of the bearing seat 4 that abuts against the step portion 33; the height of the step portion 33 is smaller than the height of the step 41 of the bearing seat 4. The pressure plate 3 includes separate upper and lower pressure plates, which form a semi-circular opening for easy opening and closing, and the total height of the edge connecting portions 32 of the upper and lower pressure plates is the same as the longitudinal section height of the plate body 31. In this embodiment, the pressure plate 3 is divided into upper and lower parts, which are staggered and fitted onto the support rod 2 as the fulcrum for the rotation of the pressure plate. One side is a closed mounting hole structure, and the other side is an open U-shaped hole structure. The closed mounting hole structure is fixed to the connecting end 22 of the support rod 2. The upper and lower semicircular plates can rotate along the axis of one of the support rods 2 and rotate to the position of the other support rod 2. The U-shaped hole structure is just engaged with the connecting end of the other support rod 2. The two U-shaped hole structures are stacked on the other support rod 2, and at this time the entire pressure plate forms a ring.

[0039] like Figure 8 As shown, the top plate 7 is a stepped cylinder. The maximum outer diameter of the cylinder is smaller than the inner diameter of the center hole of the bearing housing 4, and the outer diameter at the step is smaller than the inner diameter of the bearing 100. In this embodiment, the top plate 7 is used to transmit the lifting force to the bearing. The top plate 7 is a stepped cylinder, and the threaded hole in the middle is used for connection and fastening with the main shaft.

[0040] like Figure 9 As shown, the adjusting block 6 is a cylindrical block with internal threads. The minimum distance between the outer diameter of the adjusting block 6 and the center of the hydraulic device spindle 5 is greater than the outer diameter of the bearing seat 4. The adjusting block 6 is used to adjust the height of the pressure plate 3 mounted on the support rod. The adjusting block is provided with threaded holes for connecting and fastening with the support rod 2. The minimum distance between the outer diameter of the adjusting block 6 and the center of the spindle must be greater than the outer diameter of the bearing seat 4. Example 2

[0041] This embodiment describes the exit method of the bearing exit auxiliary device shown in Embodiment 1, including the following steps: 1) Secure the base 1 to the plane of the hydraulic device with bolts, install the support rod 2, pressure plate 3 and adjusting block 6, and screw the top plate 7 onto the main shaft to form an integrated device; 2) Open the pressure plate 3, put in the bearing seat 4 with the bearing chamber facing upward, and use the positioning function of the base 1 to achieve automatic alignment with the spindle; 3) Close the pressure plate 3 and rotate the adjusting block 6 to make the pressure plate 3 fit tightly against the surface of the bearing seat 4; 4) Start the hydraulic device spindle. The top plate 7 acts on the bearing 100, and the hydraulic device spindle 5 generates an upward lifting force. The top plate 7 drives the bearing 100 to exit from the bearing seat 4 together. 5) Remove bearing 100, lower the hydraulic device spindle 5, release the pressure plate 3, and remove bearing seat 4 from base 1. Base 1 is secured to the plane of the hydraulic device. Bearing seat 4 does not need to be flipped; it is placed directly on base 1. The positioning boss 9 is used to automatically align with the hydraulic device spindle 5. Close the pressure plate 3 tightly against the surface of bearing seat 4, start the hydraulic device spindle 5 to apply an upward lifting force to push bearing 100 out, and remove bearing 100; release the pressure plate 3 and rotate bearing seat 4 away.

[0042] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the protection scope of the present invention, which should be defined by the claims.

Claims

1. A bearing exit assist device characterized by, Includes a base (1), on which support rods (2) are arranged opposite each other. One end of the support rod (2) is connected to the base (1), and the other end is equipped with a pressure plate (3) and an adjusting block (6). The base (1), support rods (2) and pressure plate (3) form a space for accommodating the bearing seat (4). The base (1) is provided with a mounting hole for accommodating the main shaft (5) of the hydraulic device. One end of the main shaft (5) of the hydraulic device is connected to the top plate (7), which drives the top plate (7) to extend and retract up and down to push out the bearing (100) installed on the bearing seat (4).

2. The bearing egress aid of claim 1, wherein, The base (1) is a disc-shaped structure with a central mounting hole (11). Positioning bosses (9) are provided on both sides of the mounting hole (11). The positioning bosses (9) include an annular body formed by an inner sidewall (91) and an outer sidewall (92). The top of the positioning bosses (9) abuts against the end face of the bearing seat (4). A positioning cavity (93) for accommodating the hydraulic device spindle (5) is formed inside the positioning bosses (9).

3. The bearing egress aid of claim 2, wherein, The positioning boss (9) and the mounting hole (11) are concentrically arranged, and the inner diameter of the annular body is larger than the outer diameter of the top plate (7).

4. The bearing egress aid of claim 3, wherein, The positioning boss (9) forms a concave groove structure (8) with the edge of the base to accommodate and position the bearing seat (4).

5. The bearing egress aid of claim 4, wherein, The support rod (2) includes a rod body (21) and a connecting end (22) connecting both ends of the rod body (21). The cross-section of the connecting end (22) is smaller than the cross-section of the rod body (21).

6. The bearing egress aid of claim 5, wherein, The pressure plate (3) includes two semi-circular plates of the same size; the semi-circular plates include a plate body (31) and edge connecting parts (32) provided at both ends of the plate body (31); the edge connecting parts (32) of the pressure plate (3) are stacked and abut against each other; a step part (33) is provided on the side of the plate body near the bearing seat (4), the inner diameter of the step part (31) is larger than the outer diameter of the step stage (41) of the bearing seat (4) that abuts against the step part (33); the height of the step part (33) is smaller than the height of the step stage (41) of the bearing seat (4).

7. The bearing egress aid of claim 6, wherein, The pressure plate (3) includes separate upper and lower pressure plates, which form a semi-circular opening for easy separation and closure. The total height of the edge connection part (32) of the upper and lower pressure plates is the same as the longitudinal section height of the plate body (31).

8. The bearing egress aid of claim 7, wherein, The top plate (7) is a stepped cylinder, the maximum outer diameter of which is smaller than the inner diameter of the center hole of the bearing seat (4), and the outer diameter at the step is smaller than the inner diameter of the bearing (100).

9. The bearing withdrawal auxiliary device according to claim 8, characterized in that, The adjusting block (6) is a cylindrical block with internal threads. The outer diameter of the adjusting block (6) is at least greater than the outer diameter of the bearing seat (4) than the center of the hydraulic device spindle (5).

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