A lifting device for separating a car body from a bogie

Abstract

A lifting device for separating a car body from a bogie, comprising a connecting rod, an adjusting rod and connecting pins, wherein the connecting rod is provided with mounting holes at both ends, the adjusting rod is provided with connecting holes at both ends, the connecting pins are two, each of the connecting pins passes through one mounting hole and one connecting hole, and the connecting rod and the adjusting rod are connected into a whole, and the adjusting rod comprises connecting rods at both ends and an adjusting rod in the middle, the adjusting rod connects the two connecting rods into a whole and can adjust the length of the whole adjusting rod. The double-rod mode of the connecting rod and the adjusting rod arranged on both sides of the lifting hole can better share the load capacity under the lifting working condition, compared with the traditional lock or steel wire rope, precise limiting can be realized, and interference in the lifting process is avoided.

Description

Technical Field

[0001] This invention relates to a lifting device, specifically a lifting device for separating a car body from a bogie, used in conjunction with a series of rubber springs. Background Technology

[0002] When loading or overhauling rail vehicles, the car body and bogies need to be separated. To prevent excessive stretching of the primary rubber springs, or when lifting the bogies, lifting equipment is needed to control the relative displacement between the bogie and the axle box. However, current lifting equipment uses outward-protruding pins or columnar structures on the bogie and ring-shaped structures or blocks on the axle box. When lifting the bogie, the ring-shaped structure or block blocks the pins or column to lift the axle box and wheelsets.

[0003] For example, the invention patent application with application number CN201410096127.8 entitled "Method for Adjusting Wheelset Lifting Gap", the invention patent application with application number CN201810899072.2 entitled "Wheelset Lifting Device and Bogie Having the Same", and the invention patent application with application number CN201910993498.9 entitled "A Bogie Wheelset Lifting Structure" all adopt the above-mentioned structure.

[0004] However, for vehicles with built-in axle box structures, there is not enough space to install pins or rods, so none of the above structures are suitable. Summary of the Invention

[0005] This invention addresses the current lack of suitable lifting equipment for built-in axle box structures by proposing a lifting device that separates the car body from the bogie. When used in conjunction with the lifting holes of the bogie and a primary rubber spring, it can achieve precise positioning.

[0006] The technical means adopted by this invention to solve the above problems is as follows: a lifting device for separating the car body from the bogie, comprising a connecting rod, an adjusting rod, and connecting pins. The connecting rod has mounting holes at both ends, the adjusting rod has connecting holes at both ends, and there are two connecting pins, each passing through one mounting hole and one connecting hole, connecting the connecting rod and the adjusting rod into a whole. The adjusting rod includes connecting rods at both ends and an adjusting rod in the middle, connecting the two connecting rods into a whole and allowing adjustment of the entire length of the adjusting rod. By designing the adjusting rod as a three-section assembly, the length of the entire adjusting rod can be easily adjusted, facilitating the assembly and disassembly of the entire lifting device.

[0007] Furthermore, the adjusting rod and the connecting rod are connected by threads, and the two connecting rods move closer or further apart as the adjusting rod rotates. Only by operating the adjusting rod to rotate it, the two connecting rods can be moved synchronously and in opposite directions, thereby increasing or decreasing the overall length of the adjusting rod.

[0008] Furthermore, a small interference fit is made between the mounting hole and the connecting pin to ensure that it will not loosen during the lifting process.

[0009] Furthermore, the interference fit between the mounting hole and the connecting pin is 0.01-0.06mm. This ensures sufficient interference force while preventing damage to the mounting hole and the connecting pin.

[0010] Furthermore, the small clearance between the connecting hole and the connecting pin prevents excessive local stress during the lifting process.

[0011] Furthermore, the gap between the connecting hole and the connecting pin is 0.5-1.5mm.

[0012] Furthermore, the connecting pin is fitted with a non-metallic protective sleeve at the part that contacts the lifting hole to better release stress and protect the entire lifting equipment.

[0013] Furthermore, the end of the connecting pin furthest from the connecting rod has an external thread, and the adjusting rod is fixed to the connecting pin by a nut connected to the external thread. Loosening the nut allows the adjusting rod to be removed, facilitating the disassembly and assembly of the entire lifting equipment.

[0014] Furthermore, a baffle is provided at the end of the connecting pin away from its external thread to prevent the connecting rod from falling off the end of the connecting pin during the interference fit assembly process.

[0015] Furthermore, by adding or removing shims between the nut and the adjusting rod, the distance between the adjusting rod and the connecting rod can be changed, so that during the lifting process, both the connecting rod and the adjusting rod are as close as possible to the side wall of the lifting hole, thus achieving a better limiting effect.

[0016] The beneficial effects of this invention are:

[0017] 1. The present invention adopts a double-rod mode with the connecting rod and the adjusting rod respectively set on both sides of the lifting hole, which can better distribute the load under the lifting conditions. Compared with the traditional lock or wire rope, it can achieve precise positioning and ensure that no interference occurs during the lifting process.

[0018] 2. This invention designs the adjusting rod as a three-section assembly, and the length of the entire adjusting rod can be adjusted by rotating the adjusting rod. This allows the length of the adjusting rod to be shortened during lifting to ensure that the length of the connecting rod and the adjusting rod are consistent. However, during installation or disassembly, the total length of the adjusting rod can be appropriately increased to make it easier to remove the adjusting rod from the connecting pin. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the lifting equipment used in Example 1;

[0020] Figure 2 This is a schematic diagram of the overall structure of the lifting equipment in Example 1;

[0021] Figure 3 Schematic side view of the lifting equipment for Embodiment 1;

[0022] Figure 4 Schematic diagram of the connecting rod structure for Embodiment 1;

[0023] Figure 5 Schematic diagram of the adjusting rod structure for Embodiment 1;

[0024] Figure 6 Schematic diagram of the connecting pin structure for Embodiment 1;

[0025] In the figure: 100. Lifting equipment, 200. Bogie, 300. Axle box, 1. Connecting rod, 11. Mounting hole, 2. Adjusting rod, 21. Connecting hole, 22. Connecting rod, 221. Rotating ring, 23. Adjusting rod, 3. Connecting pin, 31. Non-metallic protective sleeve, 32. Baffle, 33. External thread, 4. Nut. Detailed implementation manners

[0026] The present invention will be further described below with reference to the accompanying drawings. Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams rather than physical drawings, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the accompanying drawings will be omitted, enlarged or reduced, which does not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Embodiment 1

[0027] A lifting equipment for separating the car body from the bogie, as Figure 1 shown, both ends of the lifting equipment 100 are respectively connected to the lifting holes connected to the bogie 200 and the axle box 300, which can better limit the relative position between the bogie 200 and the axle box 300 and avoid interference.

[0028] As Figure 2 and Figure 3 shown, the overall lifting equipment 100 includes a connecting rod 1, an adjusting rod 2 and a connecting pin 3. Among them, the connecting rod 1 and the adjusting rod 2 are arranged in parallel, and there are two connecting pins 3, which connect the connecting rod 1 and the adjusting rod 2 into a whole at both ends respectively, forming a structure similar to a "square" shape. When in use, the connecting pins 3 at both ends respectively pass through the lifting holes at the bogie end 200 and the axle box end 300, and the connecting rod 1 and the adjusting rod 2 are respectively located on both sides of each lifting hole, clamping the handle at the lifting hole.

[0029] As Figure 4 shown, mounting holes 11 are provided at both ends of the connecting rod 1. As Figure 5As shown, the adjusting rod 2 has connecting holes 21 at both ends. Furthermore, the adjusting rod 2 is divided into three sections, each end of which is a connecting rod 22 with a connecting hole 21. The two connecting rods 22 are connected by an adjusting rod 23 at the ends furthest from their connecting holes 21. This allows adjustment of the total length of the adjusting rod 2 for easier use. In this embodiment, internal threads are provided at the ends of the two connecting rods 22 furthest from their connecting holes 21, and external threads that mate with the internal threads are provided at both ends of the adjusting rod 23. Preferably, the external threads at both ends of the adjusting rod 23 are in opposite directions, meaning that when the adjusting rod 23 is turned in a certain direction, the adjusting rod 23 and the two connecting rods 22 simultaneously tighten or loosen, thus extending or reducing the overall length of the adjusting rod. Alternatively, external threads can be provided at both ends of the adjusting rod 23, while corresponding internal threads can be provided on the connecting rods 22. Or, one end of the adjusting rod 23 can be internally threaded, and the other end externally threaded; correspondingly, one connecting rod 22 can be internally threaded, and the other externally threaded. In short, any method that allows adjustment of the total length of the adjusting rod 2 is acceptable. Furthermore, the connection method between the adjusting rod 23 and the connecting rod 22 is not necessarily limited to a threaded connection; other connection methods that can adjust the length can also be used. In this embodiment, by using a threaded connection, the adjusting rod 2 can achieve stepless adjustment of its overall length, allowing the adjusting rod 2 to be adjusted to the optimal length.

[0030] like Figure 5 As shown, a rotating ring 221 is provided in the middle of the adjusting rod 22 to facilitate the rotation of the adjusting rod 22. The rotating ring 221 can be a nut or other structure fixed to the surface of the adjusting rod 22.

[0031] In this embodiment, the adjusting rod 2 is not required to have a very large length adjustment space. The purpose of adjusting the length is to keep the two connecting pins 3 as parallel as possible during the lifting process so as to play a better limiting role. When disassembling and assembling the lifting device 100, the connecting pins 3 should pass through the center of the connecting hole 21 as much as possible so that the adjusting rod 2 can be more easily removed from or installed from the connecting pins 3.

[0032] like Figure 6 As shown, the connecting pin 3 has a structure with one end larger than the other. Its larger end connects to the connecting rod 1, and its smaller end connects to the adjusting rod 2. A baffle 32 is also provided at its larger end. The connecting pin 3 and the mounting hole 11 are interference-fitted. When the connecting rod 1 and the connecting pin 3 are assembled with the interference fit, the baffle 32 prevents the connecting rod 1 from falling off. The interference fit is controlled between 0.01-0.06 mm. If the interference fit is too small, the interference force between the mounting hole 11 and the connecting pin 3 may not be guaranteed; if the interference fit is too large, the required pressing force will be greater, which may easily damage the mounting hole 11 and the connecting pin 3.

[0033] like Figure 6 As shown, the small end of the connecting pin 3 is provided with an external thread 33. After the connecting hole 21 passes through the connecting pin 3, the nut 4 engages with the external thread 33 to block the adjusting rod 2 and prevent it from falling off. When the adjusting rod 2 is installed on the connecting pin 3, there is a small clearance fit between the connecting hole 21 and the connecting pin 3, and the clearance is controlled within 0.5-1.5mm to avoid excessive local stress between the connecting hole 21 and the connecting pin 3 and to extend the service life of the entire lifting equipment 100.

[0034] like Figure 3 As shown, the connecting pin 3 has a non-metallic protective sleeve 31 on its outer surface that contacts the lifting hole to prevent direct metal-to-metal contact with the lifting hole, thereby better releasing stress and protecting the lifting equipment and the lifting hole. Furthermore, during lifting, both the connecting rod 1 and the adjusting rod 2 should be as close as possible to the lifting hole. That is, the gap between the connecting rod 1 or the adjusting rod 2 and the lifting hole should be as small as possible. If the gap is too large, the lifting hole may slide on the connecting pin 3, failing to provide a good limiting effect and potentially causing uneven stress on the entire lifting equipment 100, affecting performance and lifespan. Therefore, for bogies 200 or axial sections 300 with different thicknesses at the lifting hole, shims can be added or removed between the nut 4 and the adjusting rod 2 to ensure that the adjusting rod 2 and the connecting rod 1 are always in close contact with the lifting hole.

[0035] The lifting device 100 in this embodiment is used as follows: First, press the connecting pin 3 and the connecting rod 1 together with an interference fit to form a U-shaped structure. Then, pass the two connecting pins 3 of the entire U-shaped structure through the same side of the lifting holes of the bogie 200 and the axle box 300, respectively. Next, fit the two connecting holes 21 of the adjusting rod 2 onto the two connecting pins 3, using shims as needed. Finally, tighten the nut 4. The disassembly process is the reverse of this.

[0036] The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the protection scope of the invention, which should be defined by the claims.

Claims

1. A lifting device for separating the car body from the bogie, characterized in that: It includes a connecting rod (1), an adjusting rod (2) and a connecting pin (3). The connecting rod (1) has mounting holes (11) at both ends, the adjusting rod (2) has connecting holes (21) at both ends, and there are two connecting pins (3). Each connecting pin (3) passes through a mounting hole (11) and a connecting hole (21) to connect the connecting rod (1) and the adjusting rod (2) into a whole. The adjusting rod (2) includes connecting rods (22) at both ends and an adjusting rod (23) in the middle. The adjusting rod (23) connects the two connecting rods (22) into a whole and can adjust the length of the entire adjusting rod (2). A baffle (32) is provided at one end of the connecting pin (3) away from its external thread (33), and there is a small interference fit between the mounting hole (11) and the connecting pin (3); The connecting hole (21) and the connecting pin (3) are fitted with a small clearance. The end of the connecting pin (3) away from the connecting rod (1) is provided with an external thread (33). The adjusting rod (2) is fixed to the connecting pin (3) by the nut (4) connected to the external thread (33). The distance between the adjusting rod (2) and the connecting rod (1) is changed by adding or removing shims between the nut (4) and the adjusting rod (2).

2. The lifting device for separating the car body from the bogie as described in claim 1, characterized in that: The adjusting rod (23) and the connecting rod (22) are connected by a thread, and the two connecting rods (22) move closer or further apart when the adjusting rod (23) rotates.

3. The lifting device for separating the car body from the bogie as described in claim 1, characterized in that: The interference fit between the mounting hole (11) and the connecting pin (3) is 0.01-0.06mm.

4. The lifting device for separating the car body from the bogie as described in claim 1, characterized in that: The gap between the connecting hole (21) and the connecting pin (3) is 0.5-1.5mm.

5. The lifting device for separating the car body from the bogie as described in claim 1, characterized in that: The connecting pin (3) is provided with a non-metallic protective sleeve (31) at the part that contacts the lifting hole.

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