Subway train wheel set bearing dismounting tool
Through the combination of hydraulic disassembly and assembly machine and plug head, locking pin and tapered head, the existing wheel-to-bearing removal tooling time and coaxial accuracy are solved, and a fast, safe and efficient wheel-to-bearing removal process is achieved.
Patent Information
- Application Number
- CN202421039160.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing wheel-to-bearing tooling takes a long time to disassemble, is heavy, is time-consuming to operate, and cannot guarantee coaxial accuracy, resulting in low worker safety and efficiency.
A disassembly tool including hydraulic disassembly machine, wheel-to-axle and bearing is designed. Using hydraulic cylinders, positioning frames and connecting rods, the combination of plug heads, locking pins and tapered heads is used to achieve coaxial disassembly of the bearings to ensure hydraulic pressure. The cylinder piston rod, workpiece body and wheel-to-wheel shaft are coaxially consistent, simplifying operation.
It realizes the rapid and safe disassembly of wheel-to-bearings, saving labor time, improving efficiency, and ensuring workers' safety, while ensuring coaxial accuracy of the disassembly process.
Smart Images
Figure CN222221698U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wheel set bearing disassembly, in particular to a wheel set bearing disassembly tool for a subway train. Background Art
[0002] Wheelsets are the parts of a locomotive that come into contact with the rails. They consist of two wheels firmly pressed onto the same axle. The function of a wheelset is to ensure the running and steering of the locomotive on the rails, to bear all static and dynamic loads from the locomotive, to transfer them to the rails, and to transfer the loads caused by uneven tracks to the various components of the locomotive. When disassembling the wheelset bearings on a subway train, it is usually necessary to use special tooling to assist in disassembly.
[0003] In the prior art, the disassembly of the wheelset bearing is mainly carried out by manually installing the tooling. First, the cylindrical nut is installed on the wheelset shaft using the three holes on the end face of the wheelset shaft, and then the cylindrical transition tooling (20 kg) is screwed into the cylindrical nut, and finally the plug is inserted into the blind hole of the transition tooling using the hydraulic rod piston of the bearing press, and a long locking pin is inserted to connect them as a whole, and then the bearing is pushed out and pulled out. The manual operation of the upper and lower tooling is time-consuming, the tooling is heavy and may cause limb injuries, and the existing tooling is threaded, fixedly connected to the wheelset shaft by bolts, and clearance-fitted with the piston rod plug. When the pulling operation is started, the coaxial accuracy between the three cannot be guaranteed.
[0004] In order to solve the above problems, the present application proposes a subway train wheelset bearing disassembly tool. Utility Model Content
[0005] The utility model provides a subway train wheel set bearing disassembly tool to solve the above technical problems.
[0006] In order to solve the above technical problems, the utility model provides a subway train wheelset bearing disassembly tool, comprising a hydraulic disassembly machine, a wheelset shaft and a bearing. The hydraulic disassembly machine is composed of a hydraulic cylinder, a positioning frame and a plurality of connecting rods. The wheelset shaft passes through the positioning frame, and the bearing is located on the side of the wheelset shaft close to the hydraulic cylinder. A plug is fixedly connected to the piston rod of the hydraulic cylinder, and a plug pin hole is provided at the outer end of the plug. A tool body is installed on the side of the hydraulic cylinder close to the wheelset shaft, a step hole is provided on one side of the tool body, and a blind hole is provided on one side of the step hole. The hydraulic cylinder piston rod is located on one side of the tool body and extends into the step hole, and the plug is located in the blind hole. A tool pin hole is respectively provided on the top and bottom of the tool body, and a locking pin is inserted in the tool pin hole. The locking pin passes through the plug pin hole, and a cone head is integrally formed and connected to the other side of the tool body.
[0007] Preferably, the positioning frame is installed on one side of the hydraulic cylinder, the connecting rod is fixedly connected between the hydraulic cylinder and the positioning frame, and the hydraulic cylinder piston rod, the plug, the tooling body and the wheelset shaft center are located on the same axis.
[0008] Preferably, a tapered hole is provided at the center of one side of the wheelset shaft close to the tooling body.
[0009] Preferably, the gap distance between the outer end of the locking pin and the inner wall of the plug pin hole is 0.1 mm.
[0010] Preferably, the tool body is made of a cylindrical section and a cone section formed in one piece, and the cone head is installed on a side of the tool body close to the cone section.
[0011] Compared with the related art, the subway train wheel bearing disassembly tool provided by the utility model has the following beneficial effects:
[0012] A tooling body is installed on the hydraulic cylinder piston rod and the plug through a locking pin, and a cone head is installed on the tooling body. The center axes of the hydraulic cylinder piston rod, the tooling body and the cone head coincide with each other. When removing the wheelset bearing, it is only necessary to insert the cone head into the cone hole on the wheelset shaft to push out the wheelset shaft and remove the bearing. During this period, the hydraulic cylinder piston rod, the tooling body and the wheelset shaft are coaxial and can be installed once and used permanently, which saves labor, improves efficiency and ensures the safety of workers. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the overall structure of a subway train wheel bearing disassembly tool proposed by the utility model;
[0014] Figure 2 This is a structural schematic diagram of a hydraulic disassembly and assembly machine for a subway train wheel set bearing disassembly tooling proposed by the utility model;
[0015] Figure 3 This is a front sectional view of a tool body of a subway train wheelset bearing disassembly tool proposed by the utility model;
[0016] Figure 4 The utility model is a schematic diagram of a locking pin structure of a subway train wheelset bearing disassembly tool.
[0017] Numbers in the figure: 1, hydraulic cylinder, 2, plug, 3, plug pin hole, 4, connecting rod, 5, positioning frame, 6, wheelset shaft, 7, bearing, 8, tooling body, 9, cylindrical section, 10, cone section, 11, cone head, 12, blind hole, 13, step hole, 14, tooling pin hole, 15, locking pin, 16, cone hole. DETAILED DESCRIPTION
[0018] Example, by Figure 1-4It is given that the utility model includes a hydraulic disassembly and assembly machine, a wheelset shaft 6 and a bearing 7, the hydraulic disassembly and assembly machine is composed of a hydraulic cylinder 1, a positioning frame 5 and a plurality of connecting rods 4, the wheelset shaft 6 passes through the positioning frame 5, the bearing 7 is located on the side of the wheelset shaft 6 close to the hydraulic cylinder 1, a plug 2 is fixedly connected to the piston rod of the hydraulic cylinder 1, a plug pin hole 3 is provided at the outer end of the plug 2, a tooling body 8 is installed on the side of the hydraulic cylinder 1 close to the wheelset shaft 6, a step hole 13 is provided on one side of the tooling body 8, a blind hole 12 is provided on one side of the step hole 13, the piston rod of the hydraulic cylinder 1 is located on one side of the tooling body 8 and extends to the inside of the step hole 13, the plug 2 is located inside the blind hole 12, a tooling pin hole 14 is respectively provided on the top and bottom of the tooling body 8, a locking pin 15 is inserted in the tooling pin hole 14, the locking pin 15 passes through the plug pin hole 3, and a cone head 11 is integrally formed and connected to the other side of the tooling body 8.
[0019] The tooling body 8, the cone head 11 and the lock pin 15 are all made of 40Cr steel material, which has good mechanical properties and strength grade, and does not require heat treatment, saving production costs. A gap of 5mm is left between the end of the piston rod of the hydraulic cylinder 1 and the inner wall of the step hole 13, and between the end of the plug head 2 and the inner wall of the blind hole 12, respectively, to ensure that the end face of the plug head 2 does not contact the inner wall of the blind hole 12, and the working force point is always at the plug head pin hole 3.
[0020] The positioning frame 5 is installed on one side of the hydraulic cylinder 1, and the connecting rod 4 is fixedly connected between the hydraulic cylinder 1 and the positioning frame 5. The piston rod of the hydraulic cylinder 1, the plug 2, the tooling body 8 and the axis of the wheelset shaft 6 are located on the same axis.
[0021] A tapered hole 16 is provided at the center of one side of the wheelset shaft 6 close to the tooling body 8. The height of the tapered head 11 is 30 mm, and the height of the tapered hole 16 is 2 mm lower than the height of the tapered head 11. In this way, after the tapered head 11 is inserted into the tapered hole 16, a certain gap distance is maintained between the end face of the tooling body 8 and the end face of the wheelset shaft 6 to avoid contact and ensure the integrity of the end face of the wheelset shaft 6.
[0022] The gap distance between the outer end of the locking pin 15 and the inner wall of the plug pin hole 3 is 0.1 mm. This gap will not affect the stability of the tool body 8 on the plug 2, and it is also convenient for putting in and taking out while protecting the integrity of the plug pin hole 3. Both ends of the locking pin 15 are lower than the outer cylindrical surface of the tool body 8, so that contact with the bearing 7 can be avoided when removing the bearing 7. The large end of the top of the locking pin 15 adopts an arc-shaped flat top design, and the two straight lines formed by the plane are parallel to the outer surface of the cylindrical section 9 of the tool body 8, which is the standard for checking whether the locking pin 15 is misplaced.
[0023] The tooling body 8 is made of an integrally formed cylindrical section 9 and a conical section 10, and the cone head 11 is installed on one side of the tooling body 8 close to the conical section 10. The conical section 11 in the tooling body 8 enables the bearing 7 to slowly contact the outer surface of the tooling when it is separated from the wheelset shaft 6 and enters the tooling body 8, thereby protecting the bearing.
[0024] Working principle:
[0025] During operation, the tooling body 8 can be sleeved on the plug 2 on the piston rod of the hydraulic cylinder 1, and then the tooling pin hole 14 can be aligned with the plug pin hole 3 and the locking pin 15 can be inserted. The locking pin 15 passes through the plug pin hole 3 to connect the plug 2 and the tooling body 8 into a whole. After the positioning frame 5 supports the bearing 7, the hydraulic cylinder 1 is started so that its piston rod pushes the tooling body 8 close to the wheelset shaft 6. When the cone head 11 on the tooling body 8 is inserted into the cone hole 16 on the wheelset shaft 6, the contact force point between the tooling body 8 and the wheelset shaft 6 is the part where the cone head 11 is inserted into the cone hole 16, and the end face of the tooling body 8 does not contact the end face of the wheelset shaft 6. As the wheelset shaft 6 continues to be pushed, the bearing 7 gradually detaches from the wheelset shaft 6 and is slowly sleeved on the tooling body 8 until the wheelset shaft 6 and the bearing 7 are completely detached to complete the disassembly operation of the wheelset bearing.
Claims
1. A wheel bearing disassembly tool for a subway train, comprising a hydraulic disassembly machine, a wheel shaft (6) and a bearing (7), wherein the hydraulic disassembly machine is composed of a hydraulic cylinder (1), a positioning frame (5) and a plurality of connecting rods (4), wherein the wheel shaft (6) passes through the positioning frame (5), and the bearing (7) is located on a side of the wheel shaft (6) close to the hydraulic cylinder (1), and wherein: A plug (2) is fixedly connected to the piston rod of the hydraulic cylinder (1), and a plug pin hole (3) is provided at the outer end of the plug (2). A tooling body (8) is installed on the side of the hydraulic cylinder (1) close to the wheelset shaft (6), and a step hole (13) is provided on one side of the tooling body (8). A blind hole (12) is provided on one side of the step hole (13). The piston rod of the hydraulic cylinder (1) is located on one side of the tooling body (8) and extends into the step hole (13). The plug (2) is located in the blind hole (12). A tooling pin hole (14) is provided at the top and bottom of the tooling body (8), respectively. A locking pin (15) is inserted into the tooling pin hole (14). The locking pin (15) passes through the plug pin hole (3). The other side of the tooling body (8) is integrally formed with a cone head (11).
2. The subway train wheel bearing disassembly tool according to claim 1, characterized in that: The positioning frame (5) is installed on one side of the hydraulic cylinder (1), the connecting rod (4) is fixedly connected between the hydraulic cylinder (1) and the positioning frame (5), and the piston rod of the hydraulic cylinder (1), the plug (2), the tooling body (8) and the axis of the wheelset shaft (6) are located on the same axis.
3. The subway train wheel bearing disassembly tool according to claim 1, characterized in that: A tapered hole (16) is provided at the center of one side of the wheelset shaft (6) close to the tooling body (8).
4. The subway train wheel bearing disassembly tool according to claim 1, characterized in that: The gap distance between the outer end of the lock pin (15) and the inner wall of the plug pin hole (3) is 0.1 mm.
5. The subway train wheel bearing disassembly tool according to claim 1, characterized in that: The tool body (8) is made of a cylindrical section (9) and a cone section (10) formed in one piece, and the cone head (11) is installed on one side of the tool body (8) close to the cone section (10).