A vehicle bogie lifting device

Abstract

This invention relates to the technical field of rail vehicle maintenance and repair, and particularly to a bogie lifting device. The device includes a slide rail spanning the track beneath the rail vehicle. Two opposing sliding blocks are slidably mounted on the slide rail. Hydraulic jacks for connecting to and lifting the bogie are mounted on the sliding blocks. Each hydraulic jack has an adjustment unit for increasing the lifting height of the rail vehicle. This invention increases the lifting height of the hydraulic jacks, avoiding the problem of limited space at the bottom of the rail vehicle bogie, which makes it inconvenient to install larger hydraulic jacks. It also solves the problem of limited lifting height caused by small hydraulic jacks. The overall operation is convenient, facilitating the lifting of the rail vehicle bogie. It effectively prevents the bogie from falling during the lifting process, maintaining a stable connection between the lifting device and the bogie, and is suitable for rapidly lifting rail vehicle bogies.

Description

Technical Field

[0001] This invention relates to the technical field of rail vehicle inspection and maintenance, specifically to a vehicle bogie lifting device. Background Technology

[0002] Currently, rail vehicles in use require regular inspection and maintenance of some traction motor bearings and components of the shock absorption system used in the operation of the rail vehicles. The inspection and maintenance procedures of the above structures require the assistance of lifting devices to raise the height of the bogies.

[0003] However, the jacking devices currently used to raise the height of bogies have the following problems: most of the existing jacking devices are fixed. When the bogie is placed on the ground, the gap at the bottom of the bogie is small. Larger jacking devices are not easy to move to the bottom of the bogie to lift it. Smaller jacking devices can be placed at the bottom of the bogie, but the lifting height is limited, which makes maintenance inconvenient.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a vehicle bogie lifting device.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a vehicle bogie lifting device, comprising a slide rail arranged across the track on the underside of the rail vehicle, two oppositely distributed slide seats slidably arranged on the slide rail, a hydraulic jack for connecting and lifting the bogie is arranged on the slide seats, and an adjustment unit for increasing the lifting height of the rail vehicle is arranged on the hydraulic jack, the adjustment unit comprising a fixed plate arranged on the hydraulic jack and a top block arranged on the fixed plate;

[0007] A clamping unit is disposed on the top of the top block and is used to clamp and fix the bogie.

[0008] One or more pads are provided between the fixing plate and the top block. The top of the fixing plate and the pads are respectively provided with secondary splicing components, and the bottom of the pads and the top block are respectively provided with main splicing components adapted to the secondary splicing components.

[0009] Furthermore, the sub-assembly assembly includes an open connecting groove disposed on the fixing plate and the pad, a mounting bracket disposed on the inner side wall of the connecting groove, and slots disposed on the two side walls of the connecting groove. A sliding plate is disposed on the mounting bracket, a first spring is disposed on the inner side of the sliding plate and fixed to the inner end of the mounting bracket, and a plug rod for inserting the main assembly is disposed on the outer side of the sliding plate.

[0010] Furthermore, the main splicing assembly includes a connecting block for insertion into the connecting slot, a cavity disposed within the connecting block, a wedge block 1 movably disposed within the cavity, two wedge blocks 2 respectively disposed on the two wedge surfaces of the wedge block 1 and adapted to connect with the slot, a second spring disposed on one side of the wedge block 2 and connected to the side of the cavity, an insertion hole adapted to the insertion rod disposed on the inner end of the wedge block 1, and an operating handle extending to the outside disposed on the outer end of the wedge block 1.

[0011] Furthermore, the clamping unit includes clamping plates symmetrically arranged on both sides of the top block, a support plate located outside the clamping plates and horizontally displaced from the top block, and a guide rail frame horizontally arranged on the outside of the support plate.

[0012] Furthermore, screw hole side plates are symmetrically arranged on both sides of the fixed plate, and a transmission unit for driving the guide rail frame to translate is provided on the screw hole side plates;

[0013] The transmission unit includes a telescopic rod bolted to the side plate of the screw hole, a lead screw located on the upper part of the telescopic rod and moving vertically with the hydraulic jack, a gear rotatably mounted on the lead screw, a rack meshing on the horizontal side of the gear, and the rack fixed to the inner side of the guide rail frame.

[0014] Furthermore, the hydraulic jack is provided with a base plate at its bottom, with symmetrically arranged inserts on both sides of the base plate, and a fixing stud at the center of the bottom of the base plate;

[0015] The fixing stud is adapted to be fixed on the slide.

[0016] Furthermore, the base plate is provided with an outer support ring sleeved on the outside of several pads, and the outer bottom end of the outer support ring is provided with a side frame that is adapted to be embedded in the insert.

[0017] Furthermore, a fixed slot frame is vertically provided on the outer side of the side frame, a hydraulic push rod for connecting the fixed slot frame on one side is provided on one end of the slide rail, and a distance rod is also provided on the slide block;

[0018] The two ends of the distance rod are respectively fixedly connected to the corresponding fixed slots on both sides.

[0019] Furthermore, the outer support ring has an opening on one side to facilitate the placement of the pad, and the outer support ring also has a slot for the vertical movement of the screw hole side plate. The inner wall of the outer support ring is uniformly provided with guide rails that are adapted to guide the movement of the side of the pad.

[0020] Compared with the prior art, the present invention has the following beneficial effects: By using a fixed plate, pad, and top block, the present invention can increase the lifting height of the hydraulic jack through the insertion and combination of the secondary and main splicing components. On the one hand, it avoids the problem of the small gap at the bottom of the bogie of the rail vehicle making it inconvenient to install a large hydraulic jack; on the other hand, it solves the problem of limited lifting height caused by small hydraulic jacks. The overall operation is convenient and facilitates the lifting of the rail vehicle bogie, which is beneficial for the subsequent inspection and maintenance of the bottom structure of the rail vehicle and the repositioning operation of the rail vehicle on the track. Furthermore, through the clamping unit, when the top block is lifted to the support point on the bogie, the two symmetrically distributed clamping plates on the clamping unit clamp and fix the bogie support point, preventing the bogie from falling during the lifting process and maintaining a stable connection between the lifting device and the bogie. This is suitable for rapidly lifting the rail vehicle bogie. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 This is a perspective view of the overall structure of an embodiment of the present invention;

[0023] Figure 2 This is a perspective view of the lifting structure according to an embodiment of the present invention;

[0024] Figure 3 This is an exploded view of the lifting structure according to an embodiment of the present invention;

[0025] Figure 4 This is a three-dimensional structural view of a cross-section of a lifting structure according to an embodiment of the present invention;

[0026] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle;

[0027] Figure 6 This is a perspective view of a hydraulic jack according to an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the paired connection between the sub-segmentation component and the main segmentation component in one embodiment of the present invention;

[0029] Figure 8 This is a cross-sectional structural diagram of the main splicing component according to an embodiment of the present invention.

[0030] Figure 9 This is a three-dimensional structural view of a hydraulic jack according to an embodiment of the present invention.

[0031] Figure 10 This is a perspective view of the slide rail according to an embodiment of the present invention.

[0032] In the diagram: 100, slide rail; 1, slide block; 2, hydraulic jack; 21, base plate; 211, insert block; 212, fixing stud; 3, fixing plate; 31, screw hole side plate; 4, pad block; 5, top block; 6, secondary splicing assembly; 61, mounting bracket; 62, moving plate; 63, first spring; 64, insertion rod; 7, main splicing assembly; 71, connecting block; 72, wedge block one; 73, wedge block two; 74, second spring; 75, insertion hole; 76, operating handle; 8, outer support ring; 81, side frame; 811, fixing slot frame; 9, clamping unit; 91, clamping plate; 92, support plate; 921, guide rail frame; 10, transmission unit; 101, telescopic rod; 102, gear; 103, rack; 11, hydraulic push rod; 12, distance rod. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] like Figure 1-10 As shown, the present invention discloses a lifting device applied to a bogie of a rail vehicle, comprising a slide rail 100 spanning the track on the underside of the rail vehicle, two opposing slide blocks 1 slidably disposed on the slide rail 100, a hydraulic jack 2 for connecting to and lifting the bogie on the slide block 1, and an adjustment unit for increasing the lifting height of the rail vehicle on the hydraulic jack 2, the adjustment unit comprising a fixing plate 3 disposed on the hydraulic jack 2 and a top block 5 disposed on the fixing plate 3;

[0037] The clamping unit 9 is disposed on the top of the top block 5 and is used to clamp and fix the bogie.

[0038] One or more pads 4 are provided between the fixing plate 3 and the top block 5. The top of the fixing plate 3 and the pads 4 are respectively provided with sub-segmenting components 6, and the bottom of the pads 4 and the top block 5 are respectively provided with main splicing components 7 adapted to the sub-segmenting components 6.

[0039] In the specific implementation, firstly, a slide rail 100 is placed across the underside of the rail vehicle to be inspected, and corresponding hydraulic jacks 2 are rotated and fixed on two slide blocks 1 that are distributed opposite to each other on the slide rail 100. Then, the outer support ring 8 is assembled on the bottom plate 21 welded to the bottom of the hydraulic jack 2. Subsequently, the fixing plate 3 is bolted to the end of the movable plunger of the hydraulic jack 2. The lifting height can be increased as needed by sequentially stacking the corresponding number of pads 4 through the secondary splicing component 6 and the main splicing component 7, and splicing the top block 5 on the end face of the top pad 4. Finally, the clamping unit 9 and the transmission unit 10 are assembled on this device by plugging, bolting and fixing the top block 5.

[0040] After the two oppositely distributed hydraulic jacks 2 are fixed on the slide rail 100, the hydraulic jacks 2 on one side are connected by the hydraulic push rod 11. The two hydraulic jacks 2 are connected by the distance rod 12 (the distance of the distance rod 12 is equal to the distance between the opposite bogies on both sides of the rail vehicle). After the assembly is completed, the bottom of the rail vehicle can be inspected or the rail vehicle can be reset according to the actual needs.

[0041] Furthermore, by sequentially stacking and combining a fixing plate 3, several pads 4, and a top block 5 on the hydraulic jack 2, and assembling it with the auxiliary splicing component 6 and the main splicing component 7, the lifting height of the hydraulic jack 2 is increased. On the one hand, this avoids the problem that the bottom gap of the bogie of the rail vehicle is too small, making it inconvenient to install the large hydraulic jack 2. On the other hand, it solves the problem of limited lifting height caused by the small volume of the hydraulic jack 2. The overall operation is convenient and facilitates the lifting of the bogie of the rail vehicle, which is beneficial for the later inspection and maintenance of the bottom structure of the rail vehicle and the repositioning operation of the rail vehicle on the track.

[0042] In one embodiment, the sub-segment assembly 6 includes an open connecting groove disposed on the fixing plate 3 and the pad block 4, a mounting bracket 61 disposed on the inner side wall of the connecting groove, and slots disposed on the two side walls of the connecting groove. A sliding plate 62 is disposed on the mounting bracket 61, and a first spring 63 fixed to the inner end of the mounting bracket 61 is disposed on the inner side of the sliding plate 62. A plug rod 64 for inserting the main splicing assembly 7 is disposed on the outer side of the sliding plate 62. This design, through the connection grooves with open openings machined on the fixed plate 3 and the pad block 4 respectively, the mounting bracket 61 welded inside the groove, the sliding grooves machined on both sides of the outer end of the mounting bracket 61, the sliding plate 62 that slides horizontally in the sliding groove, and the insertion rod 64 welded to the outside of the sliding plate 62, enables the insertion rod 64 to push the internal structure of the main splicing component 7 when the main splicing component 7 is inserted into the connection groove, thereby fixing the main splicing component 7 in the groove, thus realizing the splicing assembly between the fixed plate 3, the pad block 4, and two adjacent superimposed pad blocks 4, as well as the pad block 4 and the top block 5;

[0043] Furthermore, by welding a first spring 63 to the inner side of the sliding plate 62 and fixing it to the inner end of the mounting bracket 61, during disassembly, by operating the operating handle 76 included on the main splicing assembly 7, the insertion rod 64 and the sliding plate 62 can be moved inward under the elastic support of the first spring 63, so that the main splicing assembly 7 spliced ​​in the connecting groove can be separated, which facilitates the overall installation and disassembly and makes the operation convenient.

[0044] Through slots are machined into both sides of the connecting groove, providing a channel for wedge 2 73 to be fitted and inserted, thus achieving a fixing effect.

[0045] In one embodiment, the main splicing assembly 7 includes a connecting block 71 for insertion into the connecting slot and a cavity disposed within the connecting block 71. A first wedge block 72 is movably disposed within the cavity. Two second wedge blocks 73 are respectively disposed on the two wedge surfaces of the first wedge block 72, which are adapted to and connected to the slot. A second spring 74 is disposed on one side of the second wedge block 73, which is connected to the side of the cavity. An insertion hole 75 adapted to the insertion rod 64 is disposed at the inner end of the first wedge block 72, and an operating handle 76 extending to the outside is disposed at the outer end of the first wedge block 72. With this design, by machining the cavity left in the connecting block 71 and installing the wedge block 72 horizontally in the cavity, and the wedge block 73 with the wedge surfaces on both sides of the wedge block 72, when the insertion hole 75 machined on one side of the wedge block 72 is adapted to be inserted and connected with the insertion rod 64, the horizontal force generated will drive the wedge block 72 to move outward. At this time, by utilizing the structure of the wedge surface, the force can be transmitted to drive the wedge blocks 73 on both sides to move in the vertical direction of the horizontal outward movement, thus realizing the fixation of the main splicing component 7 in the connecting groove;

[0046] When the operating handle 76, which is horizontally connected to the operating block 71, is operated, the wedge 72 welded to one end of the operating handle 76 will be pushed back to its initial position. Under the elastic support of the second spring 74, the wedge 73 will be moved in the opposite direction to its initial state, effectively completing the disassembly of the main splicing component 7 in the connecting groove.

[0047] In one embodiment, the clamping unit 9 includes clamping plates 91 symmetrically arranged on both sides of the top block 5, and a support plate 92 located outside the clamping plates 91 and horizontally displaced from the top block 5. A guide rail frame 921 is horizontally arranged on the outer side of the support plate 92. This design, by using the two clamping plates 91 installed on the top block 5 and the support plate 92 welded to the lower surface of the clamping plates 91 and horizontally displaced from the upper surface of the top block 5, allows the two clamping plates 91 installed on them to clamp and fix the support points of the bogie under external force. This achieves rapid lifting and fixing, preventing the bogie from falling during the lifting process, maintaining a stable connection between the lifting device and the bogie, and is suitable for rapidly lifting railway vehicle bogies.

[0048] It should be noted that a protective rubber pad is adhered to the inner end face of the clamp 91.

[0049] In one embodiment, screw hole side plates 31 are symmetrically arranged on both sides of the fixing plate 3, and a transmission unit 10 for driving the guide rail frame 921 to translate is provided on the screw hole side plates 31;

[0050] The transmission unit 10 includes a telescopic rod 101 bolted to the screw hole side plate 31, a lead screw located on the upper part of the telescopic rod 101 and moving vertically with the hydraulic jack 2, a gear 102 rotatably mounted on the lead screw, a rack 103 meshing with the horizontal side of the gear 102, and the rack 103 fixed to the inner side of the guide rail frame 921. This design, through the symmetrically welded screw-hole side plates 31 on both sides of the fixed plate 3 and the telescopic rod 101 fixed on the screw-hole side plates 31 with nuts and screws, can drive the fixed plate 3 and the telescopic rod 101 connected to the fixed plate 3 via the screw-hole side plates 31 to move upward synchronously during the lifting process of the hydraulic jack 2. At this time, the lead screw welded to the top of the telescopic rod 101 and the gear 102 installed on the lead screw are combined to form a screw-like transmission structure, which realizes that while the lead screw moves upward, it transmits force to drive the gear 102 to rotate. Under the transmission of the rack 103 fixed to one side of the guide rail frame 921 and meshing with the side of the gear 102, the support plate 92 and clamping plate 91 connected to the guide rail frame 921 move inward synchronously, fix and clamp the support point of the bogie, and operate in accordance with the upward movement of the hydraulic jack 2.

[0051] It should be noted that the two clamping plates 91 installed on the top block 5 with relative translation will have a space reserved between them and the center point, so that during the lifting process, the two clamping plates 91 can be accurately and stably clamped and fixed with the center point of the bogie.

[0052] In one embodiment, the bottom of the hydraulic jack 2 is provided with a base plate 21, and the base plate 21 is provided with symmetrically arranged inserts 211 on both sides, and a fixing stud 212 is provided at the bottom center of the base plate 21.

[0053] The fixing stud 212 is adapted to be fixed on the slide block 1. This design provides a limiting structure for the combined outer support ring 8 by means of the base plate 21 fixed to the bottom of the hydraulic jack 2 by bolts, and the inserts 211 symmetrically welded on both sides of the base plate 21, which facilitates the installation of the outer support ring 8 on the hydraulic jack 2.

[0054] Furthermore, by using the threaded screw 212 welded to the center of the bottom of the base plate 21, the combined hydraulic jack 2 can be rotated on the slide block 1, which enables convenient installation and improves the ease of assembly.

[0055] In one embodiment, the base plate 21 is provided with an outer support ring 8 that is sleeved on the outside of several pad blocks 4, and the outer bottom end of the outer support ring 8 is provided with a side frame 81 that is adapted to be embedded in the insert 211. This design effectively limits the movement of the several stacked pad blocks 4 by using the outer support ring 8 sleeved on the outside of the several stacked pad blocks 4, and stably supports the upward movement of the several pad blocks 4.

[0056] Furthermore, two outer support rings 8 are symmetrically welded to the bottom outer end of the outer support ring 8 and are adapted to be inserted into the insert 211 for easy assembly.

[0057] In one embodiment, a fixed slot frame 811 is vertically arranged on the outer side of the side frame 81, and a hydraulic push rod 11 for connecting the fixed slot frame 811 on one side is provided on one end of the slide rail 100. A distance rod 12 is also provided on the slide block 1.

[0058] The two ends of the distance rod 12 are respectively fixedly connected to the corresponding fixed slots 811 on both sides. This design allows the fixed slots 811, vertically welded to the outside of the side frame 81, to be fixedly connected to the hydraulic push rod 11 installed on one side of the slide rail 100. The distance rod 12 installed on the slide rail 100 also fixes the two oppositely distributed fixed slots 811, thus achieving the fixed assembly of the two hydraulic jacks 2 on the slide rail 100. During lifting and maintenance operations, only the hydraulic control unit needs to be connected to the hydraulic jacks 2. When resetting the rail vehicle, the hydraulic push rod 11 is lifted first and then operated, allowing the hydraulic jacks 2 connected below the rail vehicle bogie to move horizontally on the slide block 1, simplifying the operation.

[0059] It should be noted that the distance rod 12 is a support guide rod with a two-way telescopic structure.

[0060] In one embodiment, the outer support ring 8 has an opening on one side to facilitate the placement of the pad 4, and the outer support ring 8 also has a slot for the vertical movement of the screw hole side plate 31. The inner wall of the outer support ring 8 is uniformly provided with guide rails that are adapted to guide the movement of the side of the pad 4. With this design, the opening machined on one side of the outer support ring 8 allows the operating positions of several pads 4 for splicing operations to be directly opposite the opening, enabling convenient stacking of the pads 4 within the outer support ring 8.

[0061] Furthermore, by symmetrically machining grooves on both sides of the outer support ring 8, which match the moving path of the screw hole side plate 31, the fixed plate 3 installed at the end of the movable plunger on the hydraulic jack 2 and the multiple pads 4 stacked on the fixed plate 3 can smoothly make vertical linear movements.

[0062] The guide rails are uniformly welded on the inner circumferential surface of the outer support ring 8, and the guide rail grooves are adapted to the outer circumferential surface of the pad 4. During the movement of several stacked pads 4, the guide rails and guide rail grooves are matched and connected, which produces an external support and guiding effect on several spliced ​​and stacked pads 4, thereby providing a stable upward effect.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A vehicle bogie jacking device, comprising a slide rail (100) arranged on the underside of a rail vehicle across a track, two oppositely distributed slide seats (1) being slidably arranged on the slide rail (100), and a hydraulic jack (2) being arranged on the slide seat (1) and used for connecting and jacking the bogie, characterized in that: The hydraulic jack (2) is provided with an adjusting unit for increasing the lifting height of the rail vehicle, the adjusting unit comprises a fixed plate (3) arranged on the hydraulic jack (2), and a top block (5) arranged on the fixed plate (3); A clamping unit (9) is arranged on the top of the top block (5) and used for clamping and fixing the bogie; One or more than one pad (4) is arranged between the fixed plate (3) and the top block (5), the fixed plate (3) and the top of the pad (4) are respectively provided with a secondary splicing assembly (6), and the bottom of the pad (4) and the top block (5) are respectively provided with a primary splicing assembly (7) matched with the secondary splicing assembly (6); The secondary splicing assembly (6) comprises a connecting groove arranged on the fixed plate (3) and the pad (4) and having an open end, a mounting frame (61) arranged on the inner side wall of the connecting groove, and a slot arranged on the two side walls of the connecting groove, the mounting frame (61) is provided with a moving plate (62), the inner side of the moving plate (62) is provided with a first spring (63) fixed to the inner end of the mounting frame (61), and the outer side of the moving plate (62) is provided with a plug rod (64) used for plugging the primary splicing assembly (7); The primary splicing assembly (7) comprises a connecting block (71) used for plugging into the connecting groove, a cavity arranged in the connecting block (71), a wedge block one (72) movably arranged in the cavity, two wedge surfaces on the two sides of the wedge block one (72) are respectively provided with a wedge block two (73) matched with the slot, one side of the wedge block two (73) is provided with a second spring (74) connected with the side of the cavity, the inner end of the wedge block one (72) is provided with a plug hole (75) matched with the plug rod (64), and the outer end of the wedge block one (72) is provided with an operating handle (76) extending to the outside; The clamping unit (9) comprises clamping plates (91) symmetrically arranged on the two sides of the top block (5), and a supporting plate (92) arranged outside the clamping plates (91) and horizontally shifted with the top block (5), and the outer side of the supporting plate (92) is horizontally provided with a guide rail frame (921).

2. The vehicle bogie jacking device of claim 1, wherein: Screw hole side plates (31) are symmetrically arranged on the two sides of the fixed plate (3), and a transmission unit (10) for driving the horizontal translation of the guide rail frame (921) is arranged on the screw hole side plate (31); The transmission unit (10) comprises a telescopic rod (101) fixed on the screw hole side plate (31) by a screw, a lead screw arranged on the upper part of the telescopic rod (101) and vertically moving with the hydraulic jack (2), a gear (102) rotatably arranged on the lead screw, a rack (103) engaged with the horizontal side of the gear (102), and the rack (103) is fixed to the inner side of the guide rail frame (921).

3. The vehicle bogie jacking device of claim 2, wherein: A bottom plate (21) is arranged at the bottom of the hydraulic jack (2), the bottom plate (21) is symmetrically provided with an embedded block (211) on the two sides, and a fixed stud (212) is arranged at the center of the bottom of the bottom plate (21); The fixed stud (212) is matched and fixed on the sliding seat (1).

4. The vehicle bogie jacking device of claim 3, wherein: The bottom plate (21) is provided with an outer supporting ring (8) sleeved outside a plurality of the cushion blocks (4), and the outer bottom end of the outer supporting ring (8) is provided with a side frame (81) embedded in the embedding block (211).

5. The vehicle bogie jacking device of claim 4, wherein: The outer side of the side frame (81) is vertically provided with a fixed groove frame (811), one end of the sliding rail (100) is provided with a hydraulic push rod (11) for connecting one side of the fixed groove frame (811), and the sliding seat (1) is further provided with a distance rod (12). The distance rod (12) is fixedly connected with the corresponding fixed groove frames (811) on both sides at both ends.

6. The vehicle bogie jacking device of claim 4, wherein: One side of the outer supporting ring (8) is provided with an opening for conveniently placing the cushion block (4), the outer supporting ring (8) is further provided with a slot for vertical movement of the screw hole side plate (31), and the inner wall of the outer supporting ring (8) is uniformly provided with a guide rail for guiding and moving the side part of the cushion block (4).

Images