Axle box spring disassembling and assembling platform

Abstract

The axle box spring disassembling and assembling platform comprises a rectangular bottom plate and a rectangular cover plate arranged above the rectangular bottom plate in parallel, the rectangular bottom plate and the rectangular cover plate are the same in cross section area and shape, penetrating holes are formed in the positions, close to the four corners, of the rectangular bottom plate, and the penetrating holes are communicated with the rectangular cover plate. According to the axle box spring disassembling and assembling platform, the sleeving type follow-up protection device is additionally arranged outside the four supporting connecting rods of the axle box spring disassembling and assembling platform, on the aspect of safety guarantee, when a jack compresses a spring, the sleeving type follow-up protection device can effectively block splashes generated by smudginess splashing and spring breaking, a safety defense line is built for an operator, working safety and reliability are improved, and on the aspect of operation convenience, the sleeving type follow-up protection device can effectively prevent the spring from being broken. Before the axle box spring and the jack are placed, a worker holds the follow-up positioning mechanism for unlocking, the rectangular protective cover can be easily slid to a proper position, the rectangular protective cover can be automatically locked after being loosened, placing operation is not hindered, the protective cover can be simply and conveniently adjusted to the outside of the spring after placing is completed, and the working process is optimized.

Description

Technical Field

[0001] This utility model belongs to the technical field of locomotive maintenance, specifically relating to a platform for disassembling and assembling axle box springs. Background Technology

[0002] In locomotive maintenance, the disassembly and assembly of axle box springs is a crucial step in ensuring the safe and stable operation of locomotives. As a common type of locomotive used in transportation, the Dongfeng 4B diesel locomotive inevitably experiences various problems with its axle box springs during long-term operation, requiring regular disassembly, maintenance, and assembly. The axle box springs bear complex loads during locomotive operation, not only supporting the locomotive's weight but also buffering various vibrations and impacts. Therefore, during maintenance, the springs need to be removed from the locomotive and placed on a specialized disassembly and assembly platform for processing. During this process, since the springs are already compressed, jacks are used to further compress them to remove spring clips and other components, completing the disassembly and subsequent maintenance and assembly work.

[0003] However, existing procedures for disassembling and assembling axle box springs present several safety hazards that urgently need to be addressed. When a jack is used to lift and compress the spring, solid dirt often adheres to the outer wall of the spring. As the spring is compressed, this dirt splashes outward due to pressure changes. Because operators need to work closely with the jack, this splashing dirt can easily cause injury, such as eye damage if it gets into the eyes, or discomfort if it adheres to the skin. Furthermore, during spring compression, the spring is under constant stress, which may cause changes in its material, potentially leading to spring breakage. The debris generated when a spring breaks has high kinetic energy and flies outward with considerable force. The operator, being in the danger zone around the spring, is highly susceptible to being struck by this debris, causing serious injury or even endangering their life. Utility Model Content

[0004] The purpose of this invention is to provide an axle box spring disassembly and assembly platform to address the issue raised in the background section regarding the frequent disassembly, repair, and assembly of axle box springs in Dongfeng 4B diesel locomotives during locomotive maintenance. This requires the use of jacks to further compress the springs during operation. However, existing methods pose safety hazards. When compressing the springs, solid dirt adhering to the outer wall can splash outwards due to pressure changes, potentially injuring operators. Furthermore, the springs undergo changes in material properties under long-term stress, increasing the risk of breakage. The high-energy debris from a breakage could easily strike nearby personnel operating the jacks, causing serious injury or even endangering their lives.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a shaft box spring disassembly and assembly platform, comprising a rectangular base plate and a rectangular cover plate arranged parallel above the rectangular base plate. The rectangular base plate and the rectangular cover plate have the same cross-sectional area and shape. The rectangular base plate has through holes near its four corners, and each of the four through holes has a supporting connecting rod at its top, with the diameter of the supporting connecting rod being larger than the diameter of the through hole. Each of the four supporting connecting rods has a long lead screw at its top. The rectangular cover plate has lead screw sleeve holes near its four corners, and the lead screw sleeve holes are fitted onto the outside of the long lead screws. The rectangular cover plate can move up and down outside the four long lead screws through the lead screw sleeve holes. A follow-up protective device is provided between the rectangular base plate and the rectangular cover plate.

[0006] Preferably, the follow-up protective device includes a lifting sleeve, a rectangular protective cover, a long slide groove, and a follow-up positioning mechanism. The rectangular protective cover is sleeved on the outside of four supporting rods. Two lifting sleeves are welded to the inner wall of the left end of the rectangular protective cover. The two lifting sleeves are respectively sleeved on the outside of the two supporting rods in front of the left end of the rectangular base plate and the rectangular cover plate, and the lifting sleeves can slide up and down on the outside of the supporting rods. A long slide groove is provided inside the center of the right end of the rectangular protective cover, and a follow-up positioning mechanism is provided in the long slide groove.

[0007] Preferably, the follow-up positioning mechanism includes a gripping metal strip A, a gripping metal strip B, and a locking spring. The left ends of both gripping metal strip A and gripping metal strip B pass through an elongated slide groove, and gripping metal strip A is located parallel to the rear side of gripping metal strip B. Both gripping metal strip A and gripping metal strip B can slide back and forth in the elongated slide groove. Locking springs are connected between the center of gripping metal strip A and gripping metal strip B and between their left ends.

[0008] Preferably, the follow-up positioning mechanism further includes a rubber pad, a height-fixing support rod, and an anti-detachment stop rod. The left end of the gripping metal strip A and the rear outer wall of the gripping metal strip B are both welded with height-fixing support rods. The two height-fixing support rods are respectively aligned with the two support connecting rods between the right ends of the rectangular base plate and the rectangular cover plate. The outer walls of the two height-fixing support rods are fixed with rubber pads, and the two height-fixing support rods are in close contact with the outer walls of the support connecting rods through the rubber pads. The left rear outer wall of the center of the gripping metal strip A and the left front outer wall of the center of the gripping metal strip B are both fixed with anti-detachment stop rods. The two anti-detachment stop rods are blocked at the right end of the rectangular protective cover.

[0009] Preferably, the fixed-height support rod and the anti-detachment stop rod are respectively blocked on the inner wall of the left side of the right end of the rectangular protective cover and the outer wall of the right side of the right end. The fixed-height support rod and the anti-detachment stop rod can prevent the grip-type metal strip A and grip-type metal strip B from moving left and right in the long slide groove. The right ends of the grip-type metal strip A and grip-type metal strip B are both set with a semi-circular arc surface.

[0010] Preferably, when the gripping metal strip A and gripping metal strip B are respectively attached to the inner wall of the rear end and the inner wall of the front end of the long slide groove, both locking springs are in a semi-compressed state, and the rubber pad is tightly attached to the outer wall of the support rod. When both gripping metal strip A and gripping metal strip B move towards the center of the long slide groove, the rubber pad will be driven to detach from the outer wall of the support rod through the two fixed-height support rods.

[0011] Preferably, each of the four supporting connecting rods is provided with a short lead screw at its bottom end, and the bottom ends of the four short lead screws pass through the through holes inside the rectangular base plate. Each of the four short lead screws is threaded with a fixing nut on its outer side. After the fixing nuts are tightened to the bottom of the rectangular base plate, they are connected and reinforced to the short lead screws and the rectangular base plate by welding.

[0012] Preferably, each of the four long lead screws has a clamping locking nut threaded onto its outer end, and the clamping locking nut is located at the top of the rectangular cover plate. Each of the four clamping locking nuts has a height support nut symmetrically provided on its lower side. The height support nut is threaded onto the outside of the long lead screw and is located at the bottom of the rectangular cover plate.

[0013] Preferably, the support connecting rod is made from a single metal rod through machining of the short lead screw and the long lead screw, and a spare fixing hole is provided inside the center of the rectangular cover plate.

[0014] Compared with the prior art, this utility model provides a platform for disassembling and assembling axle box springs, which has the following advantages:

[0015] This invention adds a sleeve-type follow-up protective device to the outside of the four support rods of the axle box spring disassembly and assembly platform. This follow-up protective device plays an irreplaceable and crucial role in safety. During the compression operation of the spring by the jack, the spring may experience dangerous situations such as dirt splashing or breakage due to various conditions. The follow-up protective device acts like a loyal guardian, effectively blocking these potentially dangerous splashes and building a solid safety barrier for operators, ensuring they are not injured during operation. This significantly improves the safety and reliability of the entire axle box spring disassembly and assembly work. In terms of operational convenience, the follow-up protective device greatly optimizes the workflow. Before placing the axle box spring and jack, the operator simply needs to grip the follow-up positioning mechanism to unlock it, allowing the rectangular protective cover to slide flexibly to the appropriate position. After releasing, the device will quickly and automatically lock. The entire process is easy and quick, without hindering normal placement operations. After placement, the protective cover can be adjusted to the outside of the spring in the same simple way, providing convenience for subsequent operations. Attached Figure Description

[0016] Figure 1 This is a side-view three-dimensional structural diagram of a shaft box spring disassembly and assembly platform according to the present invention.

[0017] Figure 2 This is a front view schematic diagram of the axle box spring disassembly and assembly platform of this utility model.

[0018] Figure 3 This is a bottom-view three-dimensional structural diagram of a shaft box spring disassembly and assembly platform according to the present invention.

[0019] Figure 4 This is a frontal three-dimensional structural diagram of the follow-up protective device of this utility model.

[0020] Figure 5 This is a top view schematic diagram of the follow-up protective device of this utility model.

[0021] Figure 6 This is a three-dimensional disassembly diagram of the follow-up protective device of this utility model.

[0022] In the diagram: 1. Rectangular base plate; 2. Perforation; 3. Follow-up protective device; 4. Support rod; 5. Long lead screw; 6. Rectangular cover plate; 7. Spare fixing hole; 8. Fixing nut; 9. Short lead screw; 10. Clamping locking nut; 11. Height support nut; 12. Lifting sleeve; 13. Rectangular protective cover; 14. Long strip slide; 15. Follow-up positioning mechanism; 16. Rubber pad; 17. Height-fixing support rod; 18. Anti-disengagement stop bar; 19. Grip metal strip A; 20. Grip metal strip B; 21. Locking spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides, for example Figure 1-6The illustrated axle box spring disassembly and assembly platform includes a rectangular base plate 1 and a rectangular cover plate 6 parallel to the base plate 1. The rectangular base plate 1 and the rectangular cover plate 6 have the same cross-sectional area and shape. The rectangular base plate 1 has through holes 2 near its four corners, and each of the four through holes 2 has a supporting connecting rod 4 at its top. The diameter of the supporting connecting rod 4 is larger than the diameter of the through hole 2. Each of the four supporting connecting rods 4 has a long lead screw 5 at its top. The rectangular cover plate 6 has lead screw sleeve holes near its four corners, and these sleeve holes fit over the long lead screws 5. The rectangular cover plate 6 can move up and down around the four long lead screws 5 through these sleeve holes. The axle box spring of a diesel locomotive plays a crucial role in locomotive operation; it consists of multiple components. Locomotives have a specific static deflection in their prepared state. During locomotive operation, the axle boxes are subjected to complex loads from different directions. Springs buffer these loads through their elastic deformation, thereby ensuring the smooth operation of the locomotive. However, springs may experience problems such as displacement, corrosion, and aging during long-term use, which requires disassembly and reassembly for maintenance. Since the springs are in a compressed state when removed, direct operation is not only difficult but also poses safety hazards. Therefore, the purpose of this platform is to provide a safe and stable processing environment for springs. By performing pressure relief and recompression operations on the springs, the platform meets the requirements for maintenance and debugging, enabling the springs to return to their optimal working state and ensuring the normal operation of the locomotive.

[0025] like Figure 1 , Figure 2 and Figure 3As shown, each of the four supporting connecting rods 4 has a short lead screw 9 at its bottom end, and the bottom ends of the four short lead screws 9 pass through the through holes 2 inside the rectangular base plate 1. Each of the four short lead screws 9 has a fixing nut 8 threaded onto its bottom end. After the fixing nuts 8 are tightened to the bottom of the rectangular base plate 1, they are welded to the short lead screws 9 and the rectangular base plate 1 for reinforcement. Each of the four long lead screws 5 has a clamping locking nut 10 threaded onto its top end, and the clamping locking nut 10 is located at the top of the rectangular cover plate 6. Each of the four clamping locking nuts 10 has a height support nut 11 symmetrically located below it, and the height support nut 11 is threaded onto the long lead screw. The platform's core structure consists of a rectangular base plate 1, a rectangular cover plate 6, and supporting rods 4, long lead screws 5, and short lead screws 9 connecting the two. The rectangular base plate 1 and the rectangular cover plate 6 have the same shape and area, providing a stable working surface for spring disassembly and assembly. Larger diameter supporting rods 4 are installed in the perforations 2 at the four corners of the rectangular base plate 1. This design not only ensures the stable installation of the supporting rods 4 but also provides a reliable vertical support foundation for the entire platform. The long lead screw 5 at the top of the supporting rod 4 connects with the lead screw sleeve on the rectangular cover plate 6. The hole fit allows the rectangular cover plate 6 to move flexibly up and down outside the long lead screw 5, thus adjusting the distance between the cover plate and the base plate according to different spring states and operational requirements. Simultaneously, the short lead screw 9 at the bottom of the support rod 4 passes through the through hole 2 on the rectangular base plate 1 and is secured by a threaded nut 8, which is then welded for reinforcement after tightening. This connection method ensures a tight connection and overall stability between the support rod 4 and the rectangular base plate 1. The clamping locking nut 10 at the top of the long lead screw 5 and the height support nut 11 work together. The clamping locking nut 10 is located at the top of the rectangular cover plate 6 and is used for securing... The cover plate is positioned so that the height support nut 11 is located at the bottom of the rectangular cover plate 6, which can provide stable support for the cover plate and ensure that the pressure applied by the cover plate to the spring is uniform and stable during the disassembly and assembly of the spring. In addition, the support connecting rod 4, the short lead screw 9 and the long lead screw 5 are made of a single metal rod by turning. This integrated design further enhances the strength and stability of the entire support structure and reduces the risk of loosening and displacement that may occur due to component connections. The spare fixing hole 7 provided at the center of the rectangular cover plate 6 provides an additional option for spring fixing or other operations in special circumstances.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, the support connecting rod 4, short lead screw 9, and long lead screw 5 are made from a single metal rod through machining. A spare fixing hole 7 is also provided inside the center of the rectangular cover plate 6. When operating the axle box spring disassembly and assembly platform, first place the spring on the rectangular base plate 1, positioned appropriately between the four support connecting rods 4. This position ensures stable support for the spring during disassembly and assembly. Place a jack under the spring, also on the rectangular base plate 1, to compress the spring using the lifting force provided by the jack. Then, cover the spring with the rectangular cover plate 6, supported at the bottom by a height support nut 11. Adjusting the height support nut 11 ensures proper contact and pressure distribution between the cover plate and the top of the spring. Next, tighten the clamping locking nut 10 at the top of the long lead screw 5 to securely fix the rectangular cover plate 6 above the spring. Simultaneously, prepare... After securing the platform with spare screws, this series of operations ensures the stability and reliability of the entire platform during subsequent operations. Then, the jack is activated, gradually lifting upwards to apply pressure to the spring, further compressing it. When the spring is compressed to a suitable state, this state is maintained. At this point, the stress distribution inside the spring is sufficient to facilitate the removal of the spring clip. Removing the spring clip is a crucial step in the disassembly process, as it releases some of the spring's constraints, creating conditions for further disassembly and repair. After removing the spring clip, the jack is released, allowing the spring to gradually return to its original shape under its own elasticity, achieving complete relief. Finally, the clamping locking nut 10 and the rectangular cover plate 6 are removed, completing the platform operation portion of the entire spring disassembly process. Through this series of orderly operations, this platform can effectively realize the disassembly and assembly of axle box springs, meeting various spring handling needs during locomotive maintenance.

[0027] like Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, a follow-up protective device 3 is provided between the rectangular base plate 1 and the rectangular cover plate 6. The follow-up protective device 3 includes a lifting sleeve 12, a rectangular protective cover 13, a long slide groove 14, and a follow-up positioning mechanism 15. The rectangular protective cover 13 is sleeved on the outside of the four supporting rods 4. Two lifting sleeves 12 are welded to the inner wall of the left end of the rectangular protective cover 13. The two lifting sleeves 12 are respectively sleeved on the outside of the two supporting rods 4 before the left end of the rectangular base plate 1 and the rectangular cover plate 6, and the lifting sleeves 12 can slide up and down on the outside of the supporting rods 4. A long slide groove 14 is provided inside the center of the right end of the rectangular protective cover 13. The follow-up positioning mechanism 15 is provided in the long slide groove 14. The rectangular protective cover 13 is sleeved on the outside of the four supporting rods 4, providing an overall frame and protective area for the entire protective device. The two lifting sleeves 12 welded to the inner wall of the left end are respectively sleeved on the outside of the two supporting rods 4 before the left end of the rectangular base plate 1 and the rectangular cover plate 6. This sleeved design allows the lifting sleeves 12 to slide up and down on the outside of the four supporting rods 4. The sleeve 12 can slide freely up and down outside the support rod 4, thereby driving the rectangular protective cover 13 to move vertically. Through this structure, the rectangular protective cover 13 can flexibly adjust its position according to the placement and operation requirements of the spring and jack. It will not hinder the placement of the spring and jack on the rectangular base plate 1 in the early stage, and it can move to a suitable position in time after placement to protect the spring. During the disassembly and assembly of the axle box spring, when the jack lifts the spring to compress it, the spring may cause dirt to splash outward during compression due to the adhering solid dirt, or the spring may break and produce splashes. The follow-up protective device 3 plays an important role at this time. By adjusting the rectangular protective cover 13 to a suitable position outside the spring and locking it, it can effectively prevent these splashes from spreading outward, thereby providing reliable protection for the personnel operating the jack, avoiding injury to personnel, and ensuring the safety of the entire operation process.

[0028] like Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the follow-up positioning mechanism 15 includes a gripping metal strip A19, a gripping metal strip B20, and a locking spring 21. The left ends of both gripping metal strip A19 and gripping metal strip B20 pass through the elongated slide groove 14, and gripping metal strip A19 is located parallel to the rear side of gripping metal strip B20. Both gripping metal strip A19 and gripping metal strip B20 can slide back and forth in the elongated slide groove 14. Locking springs 21 are connected between the center of gripping metal strip A19 and gripping metal strip B20 and between their left ends. The follow-up positioning mechanism 15 also includes a rubber pad 1. 6. A height-fixed support rod 17 and an anti-detachment stop bar 18 are welded to the left end of the grip-type metal strip A19 (located on the rear outer wall) and the left end of the grip-type metal strip B20 (located on the front outer wall). The two height-fixed support rods 17 are respectively aligned with the two support connecting rods 4 between the right ends of the rectangular base plate 1 and the rectangular cover plate 6. Rubber pads 16 are fixed to the outer walls of both height-fixed support rods 17, and both height-fixed support rods 17 are in close contact with the outer walls of the support connecting rods 4 through the rubber pads 16. The left rear outer wall of the center of the grip-type metal strip A19 and the left front outer wall of the center of the grip-type metal strip B20 are also connected. Both are fixed with anti-detachment levers 18, which are blocked at the right end of the rectangular protective cover 13. The follow-up positioning mechanism 15 is the key part to realize the flexible operation of the protective device. When it is necessary to adjust the position of the rectangular protective cover 13, grip the follow-up positioning mechanism 15, that is, push the holding metal strip A19 and holding metal strip B20 towards the center of the long strip groove 14. At this time, the two locking springs 21 are further compressed, and at the same time, the rubber pad 16 is driven to disengage from the outer wall of the support link 4 through the height-fixed support rod 17, so that the rectangular protective cover 13 can be moved in the direction of the support link 4. The rod 4 slides freely to achieve the unlocked state, facilitating upward or downward sliding operations. When the rectangular protective cover 13 moves to the appropriate position, the grip metal strips A19 and B20 are released. Under the elastic action of the locking spring 21, the grip metal strips A19 and B20 respectively adhere to the inner wall of the rear end and the inner wall of the front end of the long slide groove 14. The two locking springs 21 are in a semi-compressed state, and the rubber pad 16 is tightly attached to the outer wall of the supporting connecting rod 4, thereby quickly locking the rectangular protective cover 13 and keeping it in the required position so that it will not move arbitrarily.

[0029] like Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the fixed-height support rod 17 and the anti-detachment stop rod 18 respectively block the inner wall on the left side of the right end of the rectangular protective cover 13 and the outer wall on the right side of the right end. The fixed-height support rod 17 and the anti-detachment stop rod 18 can prevent the grip-type metal strips A19 and B20 from moving left and right in the long slide groove 14. The right ends of the grip-type metal strips A19 and B20 are both set with a semi-circular arc surface. The grip-type metal strips A19 and B20 are respectively attached to the rear end of the long slide groove 14. When the inner wall and the front inner wall are in contact, both locking springs 21 are in a semi-compressed state, and the rubber pad 16 is tightly attached to the outer wall of the support link 4. When the grip metal strips A19 and B20 move towards the center of the long slide groove 14, the rubber pad 16 will be driven to detach from the outer wall of the support link 4 through the two fixed height support rods 17. The rubber pad 16, the fixed height support rods 17 and the anti-detachment stop rod 18 in the follow-up positioning mechanism 15 also play an important role. The fixed height support rods 17 are respectively welded The left ends of the grip-type metal strips A19 and B20 are connected, and rubber pads 16 are fixed to the outer walls. The rubber pads 16 are in close contact with the outer walls of the support rod 4. This not only increases the stability of the positioning in the locked state, but also prevents damage to the support rod 4 when the positioning mechanism slides. At the same time, the setting of the height-fixing support rod 17 also plays the role of positioning and limiting the sliding range, ensuring the accuracy and stability of the rectangular protective cover 13 during the sliding process. The anti-disengagement rod 18 is fixed at a specific position of the grip-type metal strips A19 and B20 and is blocked at the right end of the rectangular protective cover 13. The height-fixing support rod 17 and the anti-disengagement rod 18 are respectively blocked on the inner wall of the left side of the right end and the outer wall of the right side of the rectangular protective cover 13. This can effectively prevent the grip-type metal strips A19 and B20 from moving excessively left and right in the long slide groove 14, prevent the positioning mechanism from going out of the normal working range, and ensure the reliability and stability of the follow-up positioning mechanism 15.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. An axle box spring disassembly and assembly platform, comprising a rectangular bottom plate (1) and a rectangular cover plate (6) arranged in parallel above the rectangular bottom plate (1), the rectangular bottom plate (1) and the rectangular cover plate (6) have the same cross-sectional area and shape, and the rectangular bottom plate (1) is provided with a through hole (2) near the inside of each corner, the top end of each of the four through holes (2) is provided with a support connecting rod (4), the diameter of the support connecting rod (4) is larger than the diameter of the through hole (2), the top end of each of the four support connecting rods (4) is provided with a long lead screw (5), the rectangular cover plate (6) is provided with a lead screw sleeve hole near the inside of each corner, and the lead screw sleeve hole is sleeved outside the long lead screw (5), the rectangular cover plate (6) can move up and down outside the four long lead screws (5) through the lead screw sleeve hole, characterized in that: The follow-up protection device (3) is arranged between the rectangular bottom plate (1) and the rectangular cover plate (6); The follow-up protection device (3) comprises lifting sleeves (12), a rectangular protective cover (13), a long slot (14) and a follow-up positioning mechanism (15), the rectangular protective cover (13) is sleeved outside the four support connecting rods (4), two lifting sleeves (12) are welded to the left end inner wall of the rectangular protective cover (13), the two lifting sleeves (12) are respectively sleeved outside the two support connecting rods (4) in front of the left end of the rectangular bottom plate (1) and the rectangular cover plate (6), and the lifting sleeves (12) can slide up and down outside the support connecting rods (4), a long slot (14) is arranged inside the right end center of the rectangular protective cover (13), and the follow-up positioning mechanism (15) is arranged in the long slot (14).

2. The axle box spring disassembly and assembly platform of claim 1, wherein: The follow-up positioning mechanism (15) comprises holding metal strips A (19) and B (20) and locking springs (21), the holding metal strips A (19) and B (20) are respectively arranged at the left end of the long slot (14), the holding metal strip A (19) is located at the parallel rear side of the holding metal strip B (20), and the holding metal strips A (19) and B (20) can slide forward and backward in the long slot (14); the holding metal strips A (19) and B (20) are connected with the locking springs (21) at the center and the left end.

3. The axle box spring disassembly and assembly platform of claim 2, wherein: The follow-up positioning mechanism (15) further comprises rubber pads (16), height fixing support rods (17) and anti-disengagement rods (18), the height fixing support rods (17) are welded to the left end of the holding metal strip A (19) and the left end of the holding metal strip B (20), the two height fixing support rods (17) are respectively aligned with the two support connecting rods (4) between the right end of the rectangular bottom plate (1) and the rectangular cover plate (6), the rubber pads (16) are fixed to the outer walls of the two height fixing support rods (17), and the two height fixing support rods (17) are in contact with the outer walls of the support connecting rods (4) through the rubber pads (16), the anti-disengagement rods (18) are fixed to the left end outer walls of the center of the holding metal strip A (19) and the center of the holding metal strip B (20), and the two anti-disengagement rods (18) are blocked at the right end of the rectangular protective cover (13).

4. The axle box spring disassembly and assembly platform of claim 3, wherein: The height fixing support rods (17) and the anti-disengagement rods (18) are respectively blocked on the left inner wall and the right outer wall of the right end of the rectangular protective cover (13), the height fixing support rods (17) and the anti-disengagement rods (18) can prevent the holding metal strips A (19) and B (20) from moving left and right in the long slot (14), and the right ends of the holding metal strips A (19) and B (20) are provided in a semicircular arc shape.

5. The axle box spring disassembly and assembly platform of claim 4, wherein: When the holding metal strip A (19) and the holding metal strip B (20) are attached to the rear end inner wall and the front end inner wall of the long strip chute (14) respectively, the two locking springs (21) are in a semi-compressed state, and the rubber pad (16) is tightly attached to the outer wall of the support connecting rod (4), when the holding metal strip A (19) and the holding metal strip B (20) move towards the center of the long strip chute (14), the two fixed height support rods (17) will drive the rubber pad (16) to separate from the outer wall of the support connecting rod (4).

6. The axle box spring disassembly and assembly platform of claim 1, wherein: The bottom end of the four support connecting rods (4) is provided with a short lead screw (9), and the bottom end of the four short lead screws (9) penetrates through the perforated hole (2) in the inside of the rectangular bottom plate (1), the outside of the bottom end of the four short lead screws (9) is threadedly sleeved with a fixed nut (8), and the fixed nut (8) is screwed to the bottom of the rectangular bottom plate (1), and then welded to the short lead screw (9) and the rectangular bottom plate (1) for connection and reinforcement.

7. The axle box spring disassembly and assembly platform of claim 6, wherein: The top end of the four long lead screws (5) is externally threadedly sleeved with a clamping locking nut (10), and the clamping locking nut (10) is located at the top of the rectangular cover plate (6), the four clamping locking nuts (10) are symmetrically provided with height support nuts (11) on the lower side, the height support nuts (11) are threadedly sleeved on the outside of the long lead screw (5), and the height support nuts (11) are located at the bottom of the rectangular cover plate (6).

8. The axle box spring disassembly and assembly platform of claim 7, wherein: The support connecting rod (4) and the short lead screw (9) and the long lead screw (5) are made of a whole metal rod by turning machining, and the center of the rectangular cover plate (6) is further provided with a spare fixing hole (7).

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