A long-life side bearing with stress dispersion structure

Abstract

This utility model discloses a long-life side bearing with a stress-dispersing structure, relating to the field of side bearings. The key technical points are: it includes a side bearing body, which is composed of a mating upper side bearing body and a lower side bearing body. A rubber layer is sandwiched between the upper and lower side bearing bodies, and a reinforcing conical sleeve is embedded inside the rubber layer. The effect is that when the side bearing is under stress, the reinforcing conical sleeve embedded inside the rubber layer and forming an integrated structure with it will be under stress simultaneously. Through the stress-guiding characteristics of the conical structure, the stress that is easily concentrated on the rubber layer is dispersed and transferred to the reinforcing conical sleeve body, transforming the originally concentrated load into a force evenly distributed along the conical surface of the reinforcing conical sleeve. This significantly reduces the local stress intensity of the rubber layer, preventing aging, cracking, bubbling, or peeling due to long-term stress concentration, thus extending the service life of the side bearing.

Description

Technical Field

[0001] This utility model relates to the field of side bearings, and more specifically, it relates to a long-life side bearing with a stress-dispersing structure. Background Technology

[0002] Side bearings are the core components of railway freight car bogies, responsible for supporting the weight of the car body, transmitting longitudinal and lateral forces, and ensuring the relative rotation of the car body and the bogie.

[0003] In traditional side bearing structural designs, the rubber layer is typically sandwiched directly between the upper and lower parts of the side bearing body in a single, homogeneous form. It must bear the combined loads during operation, including the vertical pressure of several to tens of tons transmitted from the vehicle body and cargo, the longitudinal reciprocating traction and braking forces during train start-up and braking, and the lateral centrifugal and rotational shear forces when navigating curves. This superposition of forces easily concentrates stress in the middle, corners, and junctions with the metal surface of the rubber layer, forming "stress peak zones." Under prolonged stress, the rubber layer molecules age rapidly, first developing surface cracks, which then extend inwards accompanied by internal bubbles and decreased elasticity. In severe cases, the rubber may tear or peel off from the metal body, ultimately shortening the service life of the side bearing.

[0004] Therefore, in order to solve the above-mentioned technical problems, this application proposes a long-life side bearing with a stress-dispersing structure. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a long-life side bearing with a stress dispersion structure.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a long-life side bearing with a stress-dispersing structure, comprising a side bearing body, wherein the side bearing body is composed of a side bearing upper part and a side bearing lower part that cooperate with each other, a rubber layer is sandwiched between the side bearing upper part and the side bearing lower part, a reinforcing cone sleeve is embedded inside the rubber layer, the reinforcing cone sleeve and the rubber layer form an integrated structure to disperse and bear the stress on the rubber layer, and a side bearing wear plate is assembled at the top of the side bearing upper part.

[0007] Preferably, the top of the upper part of the side bearing body is provided with a positioning groove for positioning the side bearing wear plate. After the side bearing wear plate is placed in the positioning groove, the side bearing wear plate is fixed in the positioning groove by pressing.

[0008] Preferably, the exposed metal surfaces of the side support are coated with gray anti-rust paint, the dry film thickness of the anti-rust paint is 60μm to 80μm, and a transparent wear-resistant coating is provided on the surface of the paint layer.

[0009] Preferably, the reinforcing cone sleeve has a cone-shaped structure that is adapted to the cone-shaped area of ​​the rubber layer.

[0010] Preferably, the outer wall of the reinforcing cone sleeve is provided with an annular protrusion, and the inner wall of the rubber layer is provided with an annular groove that matches the annular protrusion at the corresponding position. The annular protrusion is embedded in the annular groove to form a mechanical locking structure.

[0011] Preferably, the upper part of the side bearing, the lower part of the side bearing, the rubber layer and the reinforcing cone sleeve are connected by an integral vulcanization molding process.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. When the side bearing is subjected to stress, the reinforcing cone sleeve embedded inside the rubber layer and forming an integrated structure with it will be subjected to stress synchronously. Through the stress guiding characteristics of the cone structure, the stress that is easily concentrated on the rubber layer is dispersed and transmitted to the reinforcing cone sleeve body, so that the originally concentrated load is transformed into a force that is evenly distributed along the cone surface of the reinforcing cone sleeve. This greatly reduces the local stress intensity of the rubber layer, avoids aging, cracking, bubbling or peeling due to long-term stress concentration, and extends the service life of the side bearing, thereby solving the problems in the background art. 2. This utility model uses a 60μm to 80μm dry film thickness gray anti-rust paint to coat the exposed metal surface of the side bearing, which can form a complete and dense protective layer on the metal surface, effectively isolating corrosive media such as water vapor, dust, and salt in the railway freight car operating environment, preventing oxidation and rust of the metal substrate, and further extending the service life of the side bearing. 3. This utility model adds a transparent wear-resistant coating to the surface of the paint layer, which not only does not affect the appearance and rust-proof performance of the gray anti-rust paint, but also improves the surface wear resistance. It can resist the friction and scratching of the bearing with other parts during assembly, handling and operation, and prevent the anti-rust paint layer from falling off due to wear and causing the protection to fail. 4. In this utility model, the upper part of the side bearing, the lower part of the side bearing, the rubber layer and the reinforcing cone sleeve are connected by an integrated vulcanization molding process, which can form a seamless overall structure. During the vulcanization process, the colloid of the rubber layer can penetrate into the micropores on the metal surface of the side bearing and the gaps in the reinforcing cone sleeve, which greatly improves the bonding strength between the rubber layer and the metal parts and the reinforcing cone sleeve, avoiding the interlayer gaps or loosening problems that may occur in traditional assembled structures. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a front view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the connection between the upper part of the side bearing and the side bearing wear plate of this utility model.

[0014] In the diagram: 1. Upper part of the side bearing; 101. Positioning groove; 2. Lower part of the side bearing; 3. Rubber layer; 4. Side bearing wear plate; 5. Reinforcing cone sleeve. Detailed Implementation

[0015] like Figure 1-3 As shown, this utility model provides a long-life side bearing with a stress-dispersing structure, including a side bearing body, which is composed of a side bearing upper part 1 and a side bearing lower part 2 that cooperate with each other. A rubber layer 3 is sandwiched between the side bearing upper part 1 and the side bearing lower part 2. A reinforcing cone sleeve 5 is embedded inside the rubber layer 3. The reinforcing cone sleeve 5 and the rubber layer 3 form an integrated structure to disperse and bear the stress on the rubber layer 3. A side bearing wear plate 4 is assembled at the top of the side bearing upper part 1. The reinforcing cone sleeve 5 has a cone-shaped structure that is adapted to the cone-shaped area of ​​the rubber layer 3, so that the two can be tightly fitted without gaps to maximize the contact area. When the side bearing is stressed, the vertical pressure and longitudinal and transverse shear forces borne by the rubber layer 3 can be evenly transmitted to the reinforcing cone sleeve 5 through the fitted cone surface. The top of the upper part 1 of the side bearing body is provided with a positioning groove 101 for positioning the side bearing wear plate 4. After the side bearing wear plate 4 is placed in the positioning groove 101, the side bearing wear plate 4 is fixed in the positioning groove 101 by pressing (by a press). The positioning groove 101 provided at the top of the upper part 1 of the side bearing body can provide accurate pre-positioning for the side bearing wear plate 4, and prevent the wear plate from shifting during the pressing process.

[0016] When the side bearing bears the combined loads such as the vertical pressure transmitted from the car body and cargo, the longitudinal reciprocating traction and braking force during train start-up and braking, and the lateral centrifugal force and rotational shear force when crossing curves, the rubber layer 3 no longer bears all the stress alone like a traditional side bearing. Instead, the reinforcing cone sleeve 5, which is embedded inside the rubber layer 3 and forms an integrated structure with it, is simultaneously subjected to the force. Through the stress guiding characteristics of the cone structure, the stress that is easily concentrated on the rubber layer 3 (such as the "stress peak" at the middle and edge corners) is dispersed and transmitted to the body of the reinforcing cone sleeve 5. This transforms the originally concentrated load into a force that is evenly distributed along the cone surface of the reinforcing cone sleeve 5, greatly reducing the local stress intensity of the rubber layer 3 and preventing it from aging, cracking, bubbling, or peeling due to long-term stress concentration, thus extending the service life of the side bearing. At the same time, the side bearing wear plate 4 installed on the upper part 1 of the side bearing body can directly contact the car body and bear the frictional wear when the car body and bogie rotate relative to each other, reducing the direct wear of the upper part 1 of the side bearing body and further ensuring the overall structural stability of the side bearing.

[0017] Furthermore, the exposed metal surfaces of the side bearings are all coated with gray anti-rust paint, with a dry film thickness of 60μm to 80μm. A transparent wear-resistant coating is applied to the paint layer. This 60μm to 80μm thick gray anti-rust paint coating forms a complete and dense protective layer on the metal surface, effectively isolating corrosive media such as moisture, dust, and salt (especially in coastal or humid areas) from the railway freight car operating environment, preventing oxidation and corrosion of the metal substrate, and further extending the service life of the side bearings. The added transparent wear-resistant coating on the paint surface does not affect the appearance and rust-proof performance of the gray anti-rust paint, but also enhances the surface's wear resistance. It can resist friction and scratches from other components during assembly, handling, and operation of the side bearing, preventing the anti-rust paint layer from falling off due to wear and causing protective failure. At the same time, the transparent coating can also enhance the surface's resistance to dirt, reduce the adhesion of oil and dust, and facilitate daily inspection and maintenance. Ultimately, through the dual protection of "rust prevention + wear resistance", the side bearing body can be ensured to maintain its structural integrity for a long time, guaranteeing its reliability and stability in the complex operating environment of railway freight cars.

[0018] Finally, this invention also provides an annular protrusion on the outer wall of the reinforcing cone sleeve 5, and an annular groove on the inner wall of the rubber layer 3 at the corresponding position, which is adapted to the annular protrusion. The annular protrusion is embedded in the annular groove to form a mechanical locking structure, which can significantly improve the bonding strength and anti-separation ability of the two. When the side bearing is subjected to vertical pressure, longitudinal and transverse shear force or rotational load, the mechanical locking structure can effectively limit the relative displacement (such as axial movement and radial offset) between the reinforcing cone sleeve 5 and the rubber layer 3 through the interlocking action of the annular protrusion and the annular groove, avoiding the "interlayer slippage" problem that may occur in traditional integrated structures. At the same time, this structure can further optimize the stress transmission path, so that the load borne by the rubber layer 3 is transmitted more evenly to the annular protrusion. The reinforced cone sleeve 5 is reinforced, and the upper part 1, lower part 2, rubber layer 3, and reinforced cone sleeve 5 of this utility model are connected by an integrated vulcanization molding process, which allows the components to form a seamless overall structure. During the vulcanization process, the colloid of the rubber layer 3 can penetrate into the micropores on the metal surface of the side bearing and the gaps in the reinforced cone sleeve 5, which greatly improves the bonding strength between the rubber layer 3 and the metal components and the reinforced cone sleeve 5, avoiding the interlayer gaps or loosening problems that may occur in traditional assembled structures. At the same time, the integrated vulcanization can ensure that the reinforced cone sleeve 5 is accurately fixed in the preset position of the rubber layer 3, and the stress dispersion effect will not be weakened due to subsequent assembly deviations. Moreover, the coaxiality and flatness of the components after molding are higher, which can ensure the uniform transmission of load when the side bearing is stressed.

[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A long-life side bearing with a stress-dispersing structure, comprising a side bearing body, said side bearing body being composed of a side bearing upper part (1) and a side bearing lower part (2) that cooperate with each other, wherein a rubber layer (3) is sandwiched between the side bearing upper part (1) and the side bearing lower part (2), characterized in that: The rubber layer (3) is embedded with a reinforcing cone sleeve (5), and the reinforcing cone sleeve (5) and the rubber layer (3) form an integrated structure to disperse and bear the stress on the rubber layer (3). The top of the upper part (1) of the side bearing is equipped with a side bearing wear plate (4).

2. The long-life side bearing with stress dispersion structure according to claim 1, characterized in that: The top of the upper part (1) of the side bearing body is provided with a positioning groove (101) for positioning the side bearing wear plate (4). After the side bearing wear plate (4) is placed in the positioning groove (101), the side bearing wear plate (4) is fixed in the positioning groove (101) by pressing.

3. The long-life side bearing with stress dispersion structure according to claim 1, characterized in that: The exposed metal surfaces of the side supports are all coated with gray anti-rust paint, the dry film thickness of which is 60μm to 80μm, and a transparent wear-resistant coating is provided on the surface of the paint layer.

4. A long-life side bearing with a stress-dispersing structure according to claim 1, characterized in that: The reinforcing cone sleeve (5) has a cone-shaped structure and is adapted to the cone-shaped area of ​​the rubber layer (3).

5. A long-life side bearing with a stress-dispersing structure according to claim 1, characterized in that: The outer wall of the reinforcing cone sleeve (5) is provided with an annular protrusion, and the inner wall of the rubber layer (3) is provided with an annular groove that matches the annular protrusion at the corresponding position. The annular protrusion is embedded in the annular groove to form a mechanical locking structure.

6. A long-life side bearing with a stress-dispersing structure according to claim 1, characterized in that: The upper part (1), lower part (2), rubber layer (3) and reinforcing cone sleeve (5) of the side bearing are connected by an integrated vulcanization molding process.

Images