Sealed anti-leakage wheel set axle box structure

Abstract

The utility model belongs to the technical field of wheel set axle boxes, and particularly relates to a sealed anti-leakage wheel set axle box structure which comprises a wheel set axle box and a connecting shaft, the connecting shaft is installed in the wheel set axle box, sealing devices are arranged at the left end and the right end in the wheel set axle box, and each sealing device comprises a first sealing mechanism and a second sealing mechanism. The first sealing mechanisms are arranged at the left end and the right end in the wheel set axle box, and the second sealing mechanisms are arranged at the left end and the right end in the wheel set axle box. According to the sealed anti-seepage wheel set axle box structure, the first sealing mechanism is arranged, the wheel set axle box is sealed through the sealing cover, meanwhile, the air inlet pipe is inflated, an air bag expands to fill a gap between the wheel set axle box and the connecting shaft, sealing of the wheel set axle box is achieved, the sealing effect is good, lubricating oil is prevented from seeping out, and the service life of the wheel set axle box is prolonged. And a second sealing mechanism is arranged, the wheel set axle box is further sealed through a third sealing ring, and the sealing effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of wheelset axle box technology, specifically a sealed and leak-proof wheelset axle box structure. Background Technology

[0002] In the existing technology, the track gauge of domestic and foreign rail vehicle operating lines is generally 1435mm standard gauge. After a long period of practical application, a relatively mature bogie structure has been formed. The existing bogies generally adopt an external axle box structure, which places the axle box outside the wheel.

[0003] Traditional frame-type bogies with external axle boxes often employ rubber cantilever joints for the axle boxes. These bogies have a large frame size and heavy weight, making them poorly adaptable to continuous, large-angle tortuous sections of track. Furthermore, the frame mass is sprung mass; during train operation, the increased frame weight leads to greater loads on the wheelsets, resulting in higher wheel-rail wear and higher operation and maintenance costs. Compared to the large and heavy external axle box bogies, internal axle box bogies have the advantages of smaller size and lighter weight. However, the design of the wheelset axle box assembly is crucial for this type of bogie. In typical internal axle box bogies, the wheelset axle box assembly uses axle box positioning, but this relies on steel springs, which have high stiffness, low deflection, weak anti-interference capabilities, and lack the ability to adjust between empty and loaded cars.

[0004] As disclosed in CN115817556A, an internal wheelset axle box device reduces the size and weight of the frame and has good adaptability to continuous large-angle tortuous sections of the track. This application uses a conical rubber spring with a larger upper part and a smaller lower part, and the rubber body is a rubber spring with a trapezoidal cross-section. This structure can achieve high lateral stiffness while ensuring low vertical stiffness, and has strong anti-interference ability, ensuring the stability of vehicle operation. The conical rubber spring is connected to the frame and axle box body, which can ensure good wheelset positioning function. At the same time, a weighing valve assembly is installed at one corner of the frame, which can adjust the brake shoe pressure through the wheelset axle box assembly and the weighing valve assembly when the vehicle is empty or loaded.

[0005] However, the device has poor shaft sealing during use, and lubricating oil is prone to leakage.

[0006] Therefore, we urgently need to provide a sealed and leak-proof wheelset axle box structure. Utility Model Content

[0007] The purpose of this invention is to provide a sealed and leak-proof wheelset axle box structure to solve the problems mentioned in the background art, such as poor shaft sealing effect and easy leakage of lubricating oil during use.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a sealed and leak-proof wheelset axle box structure, comprising a wheelset axle box and a connecting shaft, wherein the connecting shaft is installed inside the wheelset axle box, and sealing devices are provided at both ends inside the wheelset axle box, wherein the sealing devices include a first sealing mechanism and a second sealing mechanism.

[0009] The first sealing mechanism is located at both the left and right ends inside the wheelset axle box, and the second sealing mechanism is located at both the left and right ends inside the wheelset axle box.

[0010] The first sealing mechanism includes a sealing cover, a first sealing ring, a side lug, a bolt, an air bladder, an air intake pipe, a nut, and a second sealing ring. The sealing cover is installed on the left and right sides of the wheelset axle box. The first sealing ring is installed on the inner wall of the sealing cover. The side lug is fixedly installed on the outer perimeter of the sealing cover. The bolt is threaded into the inside of the side lug. The air bladder is installed on the left and right sides of the inner wall of the wheelset axle box. One end of the air intake pipe is connected to one side of the air bladder and extends to the outside of the wheelset axle box. The nut is threaded into the other end of the air intake pipe. The second sealing ring is installed at the connection between the wheelset axle box and the air intake pipe.

[0011] Preferably, the wheelset axle box has grooves on both sides, and the sealing cover can be inserted into the grooves. The sealing cover and the grooves cooperate to seal the connection between the wheelset axle box and the connecting shaft.

[0012] Preferably, threaded holes are provided on the left and right sides of the wheelset axle box, and the bolts pass through the side lugs and connect to the threaded holes. The sealing cover is fixed to both sides of the wheelset axle box by the bolts, thereby fixing the sealing cover.

[0013] Preferably, the end of the air intake pipe away from the airbag has an external thread, and the nut is threaded to the outside of the air intake pipe. By inflating the air intake pipe, the airbag expands and presses against the inner wall of the wheelset axle box and the outer wall of the connecting shaft, sealing the gap between the wheelset axle box and the connecting shaft. At the same time, the nut seals the air intake pipe to prevent the airbag from leaking.

[0014] Preferably, heat dissipation fins are provided on the front and rear surfaces of the wheelset axle box. The heat dissipation fins accelerate the dissipation of heat inside the wheelset axle box, reduce the temperature of the lubricating oil, and reduce the possibility of leakage of lubricating oil due to thermal expansion.

[0015] Preferably, the second sealing mechanism includes an internal block and a sealing ring three. The internal block is fixedly installed on the inner wall of the wheelset axle box, and the sealing ring three is installed inside the internal block.

[0016] Preferably, the built-in block has an annular placement groove inside, and the sealing ring three is installed inside the annular placement groove to further seal the wheelset axle box.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This leak-proof wheelset axle box structure, by setting a first sealing mechanism, seals the wheelset axle box through a sealing cover, and at the same time inflates the air inlet pipe, causing the air bladder to expand and fill the gap between the wheelset axle box and the connecting shaft, thereby achieving a good sealing effect and preventing lubricating oil from seeping out.

[0019] 2. This leak-proof wheelset axle box structure, by setting a second sealing mechanism, further seals the wheelset axle box through sealing ring three, thereby improving the sealing effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an exploded view of the connection between the sealing cover and the wheel set axle box of this utility model;

[0022] Figure 3 This is an exploded view of the connection between the second sealing mechanism and the wheelset axle box of this utility model;

[0023] Figure 4 This is a schematic diagram of the connection between the airbag and the air intake pipe of this utility model.

[0024] In the diagram: 1. Wheelset axle box; 2. Connecting shaft; 301. Sealing cover; 302. Sealing ring one; 303. Side lug; 304. Bolt; 305. Airbag; 306. Air intake pipe; 307. Nut; 308. Sealing ring two; 401. Internal block; 402. Sealing ring three; 5. Heat dissipation fins. Detailed Implementation

[0025] 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. Example

[0026] Due to the current technology, the shaft sealing effect is poor during use, and lubricating oil leakage is prone to occur. Please refer to [link / reference needed]. Figures 1-4This embodiment provides a sealed and leak-proof wheelset axle box structure that effectively seals the wheelset axle box and prevents lubricating oil leakage. The sealed and leak-proof wheelset axle box structure includes a wheelset axle box 1 and a connecting shaft 2. Heat dissipation fins 5 are provided on the front and rear surfaces of the wheelset axle box 1. These fins accelerate the dissipation of heat from inside the wheelset axle box 1, reducing the temperature of the lubricating oil and decreasing the possibility of leakage due to thermal expansion. The connecting shaft 2 is installed inside the wheelset axle box 1. Sealing devices are provided at both ends inside the wheelset axle box 1, including a first sealing mechanism and a second sealing mechanism.

[0027] The first sealing mechanism is located at both the left and right ends inside the wheelset axle box 1, and the second sealing mechanism is located at both the left and right ends inside the wheelset axle box 1.

[0028] The first sealing mechanism includes a sealing cover 301, a first sealing ring 302, a side lug 303, a bolt 304, an air bag 305, an air intake pipe 306, a nut 307, and a second sealing ring 308. The sealing cover 301 is installed on the left and right sides of the wheelset axle box 1. Grooves are formed on the surfaces of the left and right sides of the wheelset axle box 1, allowing the sealing cover 301 to be inserted into these grooves. The sealing cover 301, in conjunction with the grooves, seals the connection between the wheelset axle box 1 and the connecting shaft 2. The first sealing ring 302 is installed on the inner wall of the sealing cover 301. The side lugs 303 are fixedly installed around the outer perimeter of the sealing cover 301. The bolt 304 is threaded into the inside of the side lugs 303. Threaded holes are formed on the surfaces of the left and right sides of the wheelset axle box 1. The bolt 304 passes through the side lugs 303 and connects to the threaded holes, thus fixing the sealing cover 301 to both sides of the wheelset axle box 1. The air bag 305... 05 is installed on the left and right sides of the inner wall of the wheelset axle box 1. The airbag 305 is model ZF-90-3, which has excellent elasticity, ductility, good wear resistance and anti-aging performance, and improves the stability of the seal. One end of the air intake pipe 306 is connected to one side of the airbag 305 and extends to the outside of the wheelset axle box 1. The end of the air intake pipe 306 away from the airbag 305 has an external thread, and the nut 307 is threaded to the outside of the air intake pipe 306. By inflating the air intake pipe 306, the airbag 305 expands and squeezes against the inner wall of the wheelset axle box 1 and the outer wall of the connecting shaft 2, sealing the gap between the wheelset axle box 1 and the connecting shaft 2. At the same time, the nut 307 seals the air intake pipe 306 to prevent the airbag 305 from leaking. The nut 307 is threaded to the other end of the air intake pipe 306. The sealing ring 308 is installed at the connection between the wheelset axle box 1 and the air intake pipe 306. Example

[0029] Based on Example 1, please refer to Figures 1-3To improve the sealing effect of the wheelset axle box 1, this device is also equipped with a second sealing mechanism. The second sealing mechanism includes an inner block 401 and a sealing ring 402. The inner block 401 is fixedly installed on the inner wall of the wheelset axle box 1, and the sealing ring 402 is installed inside the inner block 401. An annular placement groove is opened inside the inner block 401, and the sealing ring 402 is installed inside the annular placement groove. The sealing ring 402 further seals the wheelset axle box 1.

[0030] In use, after connecting shaft 2 is connected to wheelset axle box 1, insert sealing cover 301 into the groove opened in wheelset axle box 1, and connect it with side ear 303 and threaded hole opened in wheelset axle box 1 through bolt 304 to fix sealing cover 301 on both sides of wheelset axle box 1. Then remove nut 307 and inflate air into air intake pipe 306. At this time, air bag 305 expands to fill the gap between wheelset axle box 1 and connecting shaft 2, thereby sealing wheelset axle box 1.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A sealed and leak-proof wheelset axle box structure, comprising a wheelset axle box (1) and a connecting shaft (2), wherein the connecting shaft (2) is installed inside the wheelset axle box (1), characterized in that: The wheelset axle box (1) is provided with sealing devices at both the left and right ends inside. The sealing devices include a first sealing mechanism and a second sealing mechanism. The first sealing mechanism is located at both the left and right ends inside the wheelset axle box (1), and the second sealing mechanism is located at both the left and right ends inside the wheelset axle box (1); The first sealing mechanism includes a sealing cover (301), a first sealing ring (302), a side lug (303), a bolt (304), an airbag (305), an air intake pipe (306), a nut (307), and a second sealing ring (308). The sealing cover (301) is installed on the left and right sides of the wheelset axle box (1), the first sealing ring (302) is installed on the inner wall of the sealing cover (301), and the side lug (303) is fixedly installed on the sealing cover (301). Around the outside, the bolt (304) is threaded to the inside of the side ear (303), the airbag (305) is installed on the left and right sides of the inner wall of the wheel set axle box (1), one end of the air intake pipe (306) is connected to one side of the airbag (305) and extends to the outside of the wheel set axle box (1), the nut (307) is threaded to the other end of the air intake pipe (306), and the sealing ring II (308) is installed at the connection between the wheel set axle box (1) and the air intake pipe (306).

2. The wheel set axle box structure for sealing and preventing leakage according to claim 1, characterized in that: The wheelset axle box (1) has grooves on its left and right sides, and the sealing cover (301) can be inserted into the grooves.

3. The wheel set axle box structure for sealing and preventing leakage according to claim 1, characterized in that: The wheelset axle box (1) has threaded holes on its left and right sides, and the bolt (304) passes through the side lug (303) and connects to the threaded hole.

4. The sealing and leak-proof wheelset axle box structure according to claim 1, characterized in that: The intake pipe (306) has an external thread at one end away from the airbag (305), and a nut (307) is threaded onto the outside of the intake pipe (306).

5. The sealing and leak-proof wheelset axle box structure according to claim 1, characterized in that: The wheelset axle box (1) has heat dissipation fins (5) on its front and rear sides.

6. The sealing and leak-proof wheelset axle box structure according to claim 1, characterized in that: The second sealing mechanism includes an inner block (401) and a sealing ring three (402). The inner block (401) is fixedly installed on the inner wall of the wheelset axle box (1), and the sealing ring three (402) is installed inside the inner block (401).

7. A sealing and leak-proof wheelset axle box structure according to claim 6, characterized in that: The built-in block (401) has an annular placement groove inside, and the sealing ring three (402) is installed inside the annular placement groove.

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