Auxiliary tool for dismounting and mounting shock absorber of subway train

Abstract

This utility model provides an auxiliary tooling for the disassembly and assembly of shock absorbers in subway trains, including an upper jaw, a lower jaw, and an adjusting rod. The upper jaw includes a first horizontal extension and a first disc-shaped locking portion, both integrally formed. The first disc-shaped locking portion has a first opening and a downwardly protruding first locking strip in its vertical direction. A downwardly extending first mating rod is also provided in the vertical direction of the first horizontal extension. The lower jaw includes a second horizontal extension and a second disc-shaped locking portion, both integrally formed. The second disc-shaped locking portion has a second opening and an upwardly protruding second locking strip in its vertical direction. A second upwardly extending second mating rod is also provided in the vertical direction of the second horizontal extension. The adjusting rod connects the upper and lower jaws and adjusts their length. This utility model effectively avoids the possibility of expansion and contraction of the shock absorber during disassembly and assembly, thereby helping maintenance workers reduce the workload of this maintenance task and improve maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of train auxiliary maintenance tools, and in particular to an auxiliary tool for disassembling and assembling shock absorbers in subway trains. Background Technology

[0002] With the rapid development of urban rail transit, the scale of subway operations continues to expand and transport capacity increases year by year, placing increasingly stringent requirements on the reliability and efficiency of the maintenance of key train components. As a core component of train operation, the preventive maintenance of bogies is a crucial link in ensuring the safe and stable operation of trains. As an important functional component of bogies, the standardization and efficiency of the disassembly and assembly of shock absorbers directly affect the quality of maintenance and the maintenance cycle.

[0003] In the existing shock absorber disassembly and assembly process, before removing the train shock absorber from the bogie, its stroke needs to be fixed to prevent stroke expansion and contraction or changes in the relative dimensions of the mounting holes due to the lack of external force after disassembly, which would cause difficulties in subsequent installation. The original fixing method was to wrap the shock absorber tightly with paper tape (usually 5 layers). The specific operation process was as follows: use a special wrench to remove the fixing bolts connecting the shock absorber, and gently remove the shock absorber; during installation, place the shock absorber in the installation position, fix the bolts, and then peel off the paper tape (as shown in the attached document). Figure 2 (As shown). However, the paper tape fixing method has significant drawbacks: (1) Insufficient operating space and fixing reliability. The shock absorber is installed in a special position, and the maintenance work space is limited. The paper tape wrapping operation is difficult, and it is easy to have problems such as loosening and not being able to effectively fix the shock absorber stroke. This increases the difficulty of aligning the subsequent installation holes and affects the efficiency and quality of disassembly and assembly. (2) Limited adhesion and storage time. The paper tape has poor adhesion. If the shock absorber is stored for more than a few hours, the stroke is likely to change due to tape failure. Once the stroke changes, restoring the original size requires a lot of extra manpower and time to correct it, which seriously reduces the efficiency of maintenance work and increases the difficulty of operation and maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide an auxiliary tool for the disassembly and assembly of shock absorbers in subway trains, which can effectively avoid the possibility of expansion and contraction of the shock absorbers during the disassembly and assembly process, thereby helping maintenance workers reduce the workload of this maintenance project and improve maintenance efficiency.

[0005] To achieve the above objectives, this utility model provides an auxiliary tooling for the disassembly and assembly of shock absorbers in subway trains, comprising:

[0006] The upper claw includes a first horizontal extension and a first disc latch portion that are integrally formed. The first disc latch portion has a first opening and a first downward protruding latching bar is provided in the vertical direction of the first disc latch portion. The first horizontal extension portion has a first downward extending mating rod provided in the vertical direction of the first horizontal extension portion. The upper claw cooperates with the shock absorber.

[0007] The lower claw includes a second horizontal extension and a second disc latch, which are integrally formed. The second disc latch has a second opening and a second latching bar that protrudes upward in the vertical direction. The second horizontal extension has a second mating rod that extends upward in the vertical direction. The lower claw cooperates with the shock absorber.

[0008] An adjusting rod is provided, which connects an upper claw and a lower claw. The outer surface of the adjusting rod is a prismatic rod body, and an axial through hole is provided inside. The through hole cooperates with a first mating rod and a second mating rod to adjust the length of the adjusting rod.

[0009] In one embodiment of this utility model, the size of the first disc latch is adapted to the size of the upper part of the shock absorber, and the first opening of the first disc latch is a U-shaped opening, the size of the first opening being larger than the size of the upper neck of the shock absorber.

[0010] In one embodiment of this utility model, the size of the second disc latch is adapted to the size of the lower part of the shock absorber, and the second opening of the second disc latch is a U-shaped opening, the size of which is larger than the size of the lower neck of the shock absorber.

[0011] In one embodiment of this utility model, the first mating rod is a right-hand threaded rod, which is rotatably connected to the upper part of the adjusting rod, and the second mating rod is a left-hand threaded rod, which is rotatably connected to the lower part of the adjusting rod.

[0012] In one embodiment of this utility model, the outer part of the adjusting rod is hexagonal, the through hole is a threaded hole, and an annular limiting boss is provided in the middle of the through hole. When the adjusting rod is rotated, the upper claw and the lower claw are driven to produce synchronous and equal reverse displacement.

[0013] In one embodiment of this utility model, the top of the adjusting rod is connected to the upper claw via a locking nut, and the bottom of the adjusting rod is connected to the lower claw via a locking nut.

[0014] In one embodiment of the present invention, the first horizontal extension is a square extension, and the first mating rod is fixedly connected to the first horizontal extension; the second horizontal extension is a square extension, and the second mating rod is fixedly connected to the second horizontal extension.

[0015] In one embodiment of this utility model, the first card strip is an arc-shaped protrusion structure, symmetrically distributed along the edge of the first disc opening; the second card strip is an arc-shaped protrusion structure, symmetrically distributed along the edge of the second disc opening.

[0016] This utility model has the following advantages: It is a specialized tooling for assisting in fixing the travel of shock absorbers during the maintenance and disassembly of subway train shock absorbers. Firstly, this utility model improves fixing reliability and eliminates safety hazards. It uses a mechanical structure design to fix the shock absorber travel, and through threaded fastening and other connection methods, it can quickly and stably lock the shock absorber travel, solving problems such as loosening and insufficient adhesion caused by limited operating space for paper tape. Secondly, this utility model reduces labor intensity and improves maintenance efficiency. Its operation design conforms to the spatial characteristics of the shock absorber installation location, eliminating the need for complex winding actions. Maintenance workers can complete fixing and unlocking through simple mechanical operations, reducing the difficulty of working in confined spaces. Thirdly, this utility model saves material costs, achieving cost reduction and efficiency improvement. The tooling is reusable, replacing the original binding technology that required a large amount of paper tape, reducing material procurement and replacement costs. Finally, this utility model has strong adaptability and ensures operational safety. This invention is specifically designed for the structural characteristics and installation environment of subway train shock absorbers, enabling it to match the stroke fixing requirements of different shock absorber models and avoiding fixing deviations caused by the incompatibility of paper tape. In summary, this invention, through its innovative mechanical fixing structure, effectively prevents the possible expansion and contraction of the shock absorber during disassembly and assembly, thereby helping maintenance workers reduce the workload of this maintenance task and improve maintenance efficiency. Attached Figure Description

[0017] Figure 1 A structural diagram of an auxiliary tooling for disassembling and assembling shock absorbers for subway trains, according to an embodiment of the present invention, is disclosed.

[0018] Figure 2 A structural diagram of the upper jaw of an auxiliary tool for disassembling and assembling shock absorbers for subway trains, according to an embodiment of the present invention, is disclosed.

[0019] Figure 3 This invention discloses a structural diagram of the lower jaw of an auxiliary tooling for disassembling and assembling shock absorbers in a subway train, according to an embodiment of the present invention.

[0020] Figure 4a A top view of the upper jaw of an auxiliary tooling for disassembling and assembling shock absorbers for subway trains, according to an embodiment of the present invention, is shown.

[0021] Figure 4b The image shows a front view of the upper jaw of an auxiliary tooling for disassembling and assembling shock absorbers for subway trains, according to an embodiment of the present invention.

[0022] Figure 4c The left view of the upper jaw of the auxiliary tooling for disassembling and assembling shock absorbers of subway trains, according to an embodiment of the present invention, is shown.

[0023] Figure 5aA top view of the adjusting rod of the auxiliary tooling for disassembling and assembling shock absorbers of subway trains, according to an embodiment of the present invention, is shown.

[0024] Figure 5b The image shows a front view of an adjusting rod of an auxiliary tooling for disassembling and assembling shock absorbers in a subway train, according to an embodiment of the present invention.

[0025] Figure 5c An axial cross-sectional view of the adjusting rod of an auxiliary tool for disassembling and assembling a shock absorber in a subway train, according to an embodiment of the present invention, is shown.

[0026] Figure 6a A top view of the lower jaw of an auxiliary tooling for disassembling and assembling shock absorbers for subway trains, according to an embodiment of the present invention, is shown.

[0027] Figure 6b The image shows a front view of the lower jaw of an auxiliary tooling for disassembling and assembling shock absorbers for subway trains, according to an embodiment of the present invention.

[0028] Figure 6c The left view shows the lower jaw of an auxiliary tool for disassembling and assembling shock absorbers for subway trains, according to an embodiment of the present invention.

[0029] Figure Labels

[0030] 1. Upper jaw; 11. First horizontal extension; 12. First disc jaw; 13. First locking bar; 14. First mating rod; 2. Lower jaw; 21. Second horizontal extension; 22. Second disc jaw; 23. Second locking bar; 24. Second mating rod; 3. Adjusting rod. Detailed Implementation

[0031] 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 the utility model and are not intended to limit the utility model.

[0032] In the first embodiment of this utility model, as Figure 1 As shown, an auxiliary tooling for disassembling and assembling shock absorbers in subway trains includes an upper jaw 1, a lower jaw 2, and an adjusting rod 3. Figure 2 As shown, the upper claw 1 includes a first horizontal extension 11 and a first disc latch 12, which are integrally formed. The first disc latch 12 has a first opening, and a downwardly protruding first latching bar 13 is provided in the vertical direction of the first disc latch 12. The first horizontal extension 11 has a downwardly extending first engaging rod 14 in the vertical direction. The upper claw 1 engages with the shock absorber. Figure 3As shown, the lower claw 2 includes a second horizontal extension 21 and a second disc latch 22, which are integrally formed. The second disc latch 22 has a second opening, and a second latching bar 23 protruding upwards is provided in the vertical direction of the second disc latch 22. A second mating rod 24 extending upwards is provided in the vertical direction of the second horizontal extension 21. The lower claw 2 cooperates with the shock absorber. The adjusting rod 3 connects the upper claw 1 and the lower claw 2. The outer surface of the adjusting rod 3 is a prismatic rod body, and an axially penetrating through hole is provided inside. The through hole cooperates with the first mating rod 14 and the second mating rod 24 to adjust the length of the adjusting rod 3.

[0033] In this embodiment, the size of the first disc latch 12 is adapted to the size of the upper part of the shock absorber, and the first opening of the first disc latch 12 is a U-shaped opening, the size of which is larger than the size of the upper neck of the shock absorber.

[0034] In this embodiment, the size of the second disc latch 22 is adapted to the size of the lower part of the shock absorber, and the second opening of the second disc latch 22 is a U-shaped opening, the size of which is larger than the size of the lower neck of the shock absorber.

[0035] In this embodiment, the first mating rod 14 is a right-hand threaded rod, rotatably connected to the upper part of the adjusting rod 3, and the second mating rod 24 is a left-hand threaded rod, rotatably connected to the lower part of the adjusting rod 3. Preferably, in this embodiment, the right-hand threaded rod can be an M12 or M8 right-hand threaded rod, and the left-hand threaded rod can be an M12 or M8 left-hand threaded rod.

[0036] In this embodiment, the adjusting rod 3 is hexagonal on the outside and has a threaded hole. An annular limiting boss is provided in the middle of the hole. When the adjusting rod 3 is rotated, the upper claw 1 and the lower claw 2 are driven to produce synchronous and equal reverse displacement.

[0037] In this embodiment, the top of the adjusting rod 3 is connected to the upper claw 1 via a locking nut, and the bottom of the adjusting rod 3 is connected to the lower claw 2 via a locking nut.

[0038] In this embodiment, the first horizontal extension 11 is a square extension, and the first mating rod 14 is fixedly connected to the first horizontal extension 11; the second horizontal extension 21 is a square extension, and the second mating rod 24 is fixedly connected to the second horizontal extension 21.

[0039] In this embodiment, the first locking strip 13 is an arc-shaped protrusion structure, symmetrically distributed along the edge of the first disc locking portion 12; the second locking strip 23 is an arc-shaped protrusion structure, symmetrically distributed along the edge of the second disc locking portion 22.

[0040] In the second embodiment of this utility model, the radius of the upper disc of the selected shock absorber is 40mm, the radius of the lower disc is 35mm, the diameter of the upper neck of the shock absorber is less than 40mm, and the diameter of the lower neck of the shock absorber is less than 44mm.

[0041] like Figure 4a , Figure 4b , Figure 4c As shown, in the upper jaw, a circular hole is provided at the center of the first horizontal extension along the horizontal axis. The left side of the first horizontal extension also includes two cast fillets with a diameter of 10mm. The radius of the first disc jaw is 43mm, the opening diameter of the first opening is 40mm, and the depth is 63mm. The distance between the center of the first disc jaw and the center of the circular hole is 65mm. A downwardly protruding first locking bar is provided vertically in the first disc jaw, with a width of 3mm and a downward protrusion length of 10mm. A downwardly extending first mating rod is provided vertically in the first horizontal extension. The first mating rod is an M12 right-hand threaded rod with a thread pitch of 1.5mm. The vertical length of the upper jaw is 99mm.

[0042] like Figure 6a , Figure 6b , Figure 6c As shown, in the lower jaw, a circular hole is provided at the center of the second horizontal extension along the horizontal axis. The left side of the second horizontal extension also includes two cast fillets with a diameter of 10mm. The radius of the second disc jaw is 38mm, the opening diameter of the second opening is 44mm, and the depth is 60mm. The distance between the center of the second disc jaw and the center of the circular hole is 65mm. A second upward-protruding locking bar is provided vertically in the second disc jaw, with a width of 3mm and an upward protrusion length of 10mm. A second upward-extending mating rod is provided vertically in the second horizontal extension. The second mating rod is an M12 right-hand threaded rod with a thread pitch of 1.5mm. The vertical length of the lower jaw is 104mm.

[0043] like Figure 5a , Figure 5b , Figure 5c As shown, the adjusting rod connects the upper and lower jaws. The outer surface of the adjusting rod is a hexagonal prism, 150mm in length, with a 25mm diameter hexagonal cross-section. An axially penetrating through-hole is provided inside, using an M12 threaded hole with a thread pitch of 1.5mm. The through-hole can mate with both right-hand and left-hand M12 threaded rods to adjust the length of the adjusting rod. An annular limiting boss is located in the center of the through-hole, which drives the upper and lower jaws to produce synchronous, equal, and opposite displacements when the adjusting rod is rotated.

[0044] In the third embodiment of this utility model, the method of using the auxiliary tooling for disassembling and assembling subway train shock absorbers is as follows:

[0045] S1 places an auxiliary tool for disassembling and assembling subway train shock absorbers on the outside of the shock absorber. The first disc jaw of the upper jaw engages with the upper part of the shock absorber, and the first downward-protruding locking strip secures the upper part of the shock absorber. The second disc jaw of the lower jaw engages with the lower part of the shock absorber, and the second downward-protruding locking strip secures the lower part of the shock absorber.

[0046] Adjust the S2 adjustment lever to the appropriate position. Rotate the adjustment lever by hand until the surfaces of the upper and lower claws are in close contact with the upper and lower surfaces of the shock absorber.

[0047] S3 adjusts the top and upper jaw of the locking nut fixing rod, and adjusts the bottom and lower jaw of the locking nut fixing rod.

[0048] This utility model has the following advantages: It is a specialized tooling for assisting in fixing the travel of shock absorbers during the maintenance and disassembly of subway train shock absorbers. Firstly, this utility model improves fixing reliability and eliminates safety hazards. It uses a mechanical structure design to fix the shock absorber travel, and through threaded fastening and other connection methods, it can quickly and stably lock the shock absorber travel, solving problems such as loosening and insufficient adhesion caused by limited operating space for paper tape. Secondly, this utility model reduces labor intensity and improves maintenance efficiency. Its operation design conforms to the spatial characteristics of the shock absorber installation location, eliminating the need for complex winding actions. Maintenance workers can complete fixing and unlocking through simple mechanical operations, reducing the difficulty of working in confined spaces. Thirdly, this utility model saves material costs, achieving cost reduction and efficiency improvement. The tooling is reusable, replacing the original binding technology that required a large amount of paper tape, reducing material procurement and replacement costs. Finally, this utility model has strong adaptability and ensures operational safety. This invention is specifically designed for the structural characteristics and installation environment of subway train shock absorbers, enabling it to match the stroke fixing requirements of different shock absorber models and avoiding fixing deviations caused by the incompatibility of paper tape. In summary, this invention, through its innovative mechanical fixing structure, effectively prevents the possible expansion and contraction of the shock absorber during disassembly and assembly, thereby helping maintenance workers reduce the workload of this maintenance task and improve maintenance efficiency.

[0049] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and similar terms used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal connection of two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0050] The embodiments described above are merely further illustrations of the present invention and are not intended to limit the present invention in any other way. The present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding modifications and changes based on the present invention, but all such modifications and changes should fall within the protection scope of the present invention.

Claims

1. An auxiliary tooling for disassembling and assembling shock absorbers in subway trains, characterized in that, include: The upper claw includes a first horizontal extension and a first disc latch portion that are integrally formed. The first disc latch portion has a first opening and a first downward protruding latching bar is provided in the vertical direction of the first disc latch portion. The first horizontal extension portion has a first downward extending mating rod provided in the vertical direction of the first horizontal extension portion. The upper claw cooperates with the shock absorber. The lower claw includes a second horizontal extension and a second disc latch, which are integrally formed. The second disc latch has a second opening and a second latching bar that protrudes upward in the vertical direction. The second horizontal extension has a second mating rod that extends upward in the vertical direction. The lower claw cooperates with the shock absorber. An adjusting rod is provided, which connects an upper claw and a lower claw. The outer surface of the adjusting rod is a prismatic rod body, and an axial through hole is provided inside. The through hole cooperates with a first mating rod and a second mating rod to adjust the length of the adjusting rod.

2. The auxiliary tooling for disassembling and assembling shock absorbers for subway trains according to claim 1, characterized in that, The size of the first disc latch is adapted to the size of the upper part of the shock absorber. The first opening of the first disc latch is a U-shaped opening, and the size of the first opening is larger than the size of the upper neck of the shock absorber.

3. The auxiliary tooling for disassembling and assembling shock absorbers for subway trains according to claim 1, characterized in that, The dimensions of the second disc latch are adapted to the dimensions of the lower part of the shock absorber. The second opening of the second disc latch is a U-shaped opening, and the dimensions of the second opening are larger than the dimensions of the lower neck of the shock absorber.

4. The auxiliary tooling for disassembling and assembling shock absorbers for subway trains according to claim 1, characterized in that, The first mating rod is a right-hand threaded rod, which is rotatably connected to the upper part of the adjusting rod, and the second mating rod is a left-hand threaded rod, which is rotatably connected to the lower part of the adjusting rod.

5. The auxiliary tool for disassembling and assembling the shock absorber of the subway train according to claim 1, wherein, The adjusting rod is hexagonal on the outside, and the through hole is a threaded hole. An annular limiting boss is provided in the middle of the through hole. When the adjusting rod is rotated, the upper and lower claws are driven to produce synchronous and equal reverse displacement.

6. The auxiliary tooling for disassembling and assembling shock absorbers for subway trains according to claim 1, characterized in that, The top of the adjusting rod is connected to the upper jaw via a locking nut, and the bottom of the adjusting rod is connected to the lower jaw via a locking nut.

7. The auxiliary tooling for disassembling and assembling shock absorbers for subway trains according to claim 1, characterized in that, The first horizontal extension is a square extension, and the first mating rod is fixedly connected to the first horizontal extension; the second horizontal extension is a square extension, and the second mating rod is fixedly connected to the second horizontal extension.

8. The auxiliary tooling for disassembling and assembling shock absorbers for subway trains according to claim 1, characterized in that, The first locking strip is an arc-shaped protrusion structure, symmetrically distributed along the edge of the first disc locking opening; the second locking strip is an arc-shaped protrusion structure, symmetrically distributed along the edge of the second disc locking opening.

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