Welded frame bogie and railway vehicle

Abstract

The utility model provides a kind of welding frame type bogie and railway vehicle, welding frame type bogie is applied to railway vehicle, and welding frame type bogie includes: framework;Guide frame is set on framework, and guide frame has inclined surface;Suspension component is set on framework, and suspension component includes inclined wedge, and inclined wedge is below inclined surface;First elastic member is set between inclined surface and inclined wedge, to provide longitudinal stiffness and transverse stiffness for railway vehicle. The damping effect of welding frame type bogie can be improved by the scheme.

Description

[0001] This application claims priority to Chinese Patent Application No. 202521839666.6, filed on August 27, 2025, entitled "Welded Frame Bogie and Rail Vehicle". Technical Field

[0002] This utility model relates to the field of bogie technology, and more specifically, to a welded frame bogie and a rail vehicle. Background Technology

[0003] Railway freight car bogies can be divided into two main categories: welded frame bogies and cast steel three-piece bogies. Welded frame bogies mainly include components such as the frame, basic braking system, elastic side bearings, guide frame, and suspension components. The wedge of the suspension component is usually located below and abuts against the guide frame. When the vehicle is running, the wedge of the suspension component is in rigid contact with the guide frame, affecting the vibration reduction effect of the welded frame bogie. Utility Model Content

[0004] The main objective of this invention is to provide a welded frame bogie and rail vehicle to improve the vibration reduction effect of the welded frame bogie.

[0005] To achieve the above objectives, this utility model provides a welded frame bogie for use on rail vehicles. The welded frame bogie includes: a frame; a guide frame disposed on the frame, the guide frame having an inclined surface; a suspension member disposed on the frame, the suspension member including a wedge located below the inclined surface; and a first elastic element disposed between the inclined surface and the wedge to provide longitudinal and lateral stiffness for the rail vehicle.

[0006] Furthermore, the welded frame bogie also includes: a first liner plate, fixed to one side of the first elastic member, the first liner plate abutting and limiting the engagement with one of the inclined surface and the wedge.

[0007] Furthermore, the first liner is fixed to the side of the first elastic member facing the wedge. The wedge is provided with a insertion hole, and the first liner is provided with an insertion part. The insertion part is inserted into the insertion hole to restrict the position of the first liner on the wedge.

[0008] Furthermore, the wedge is provided with multiple insertion holes, each of which is circular, and the first liner is provided with multiple insertion parts, each of which is cylindrical, with the multiple insertion holes and multiple insertion parts corresponding one to one; or, the insertion holes are polygonal holes, and the outline of the insertion part matches the shape of the polygonal hole.

[0009] Furthermore, the suspension component includes an axle box, and the guide frame also includes an extension located on one side of the inclined surface. The extension extends downward, and the wedge includes a first plate and a second plate. The first plate and the second plate are arranged at an angle. The position where the first plate and the second plate are connected has a clearance recess, which is directly opposite to the extension. The first plate faces the inclined surface, and a insertion hole is provided on the first plate. The second plate faces the side wall of the axle box and abuts against the side wall of the axle box.

[0010] Furthermore, the welded frame bogie also includes a second liner fixed to the other side of the first elastic member, the second liner abutting against the inclined surface.

[0011] Furthermore, the first elastic element includes: a rubber pad, which is fixedly connected to the first liner and the second liner respectively; or, a spring, which is fixedly connected to the first liner and the second liner respectively.

[0012] Furthermore, if the first elastic element includes a rubber pad, a rubber pad is formed by vulcanization between the first liner and the second liner.

[0013] Furthermore, the thickness of the rubber pad is greater than or equal to twice the thickness of the first liner; and / or, the thickness of the rubber pad is greater than or equal to twice the thickness of the second liner.

[0014] Furthermore, the welded frame bogie also includes: a first wear plate, fixed on the inclined surface, the first wear plate abutting against a first elastic member to increase the friction between the first wear plate and the first elastic member; or, an axle box and a second elastic member, the axle box being disposed on the frame, and the second elastic member being disposed between the axle box and the wedge to support the wedge.

[0015] According to another aspect of the present invention, the present invention provides a rail vehicle comprising the aforementioned welded frame bogie.

[0016] By applying the technical solution of this utility model, a first elastic element is provided between the wedge and the guide frame, thereby providing longitudinal and lateral stiffness to the rail vehicle and improving its dynamic performance. The first elastic element provides both longitudinal and lateral stiffness to the rail vehicle through its longitudinal preload force under pre-compression, longitudinal restoring force under dynamic loading, and shear deformation force under lateral force. Furthermore, the first elastic element avoids rigid contact between the inclined surface of the guide frame and the wedge, improving the response performance of the welded frame bogie under dynamic loads, while reducing wear and impact between components. The first elastic element contributes to improving the overall dynamic performance of the vehicle, reducing wheel-rail impact, improving vibration damping performance, enhancing ride comfort and safety, and extending the service life of key vehicle components. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 A partial structural schematic diagram of the welded frame bogie provided by this utility model is shown; Figure 2 It shows Figure 1 A partial structural diagram at point A in the middle; Figure 3 This invention provides a schematic diagram showing the structure of the wedge, first liner, rubber pad, and second liner in conjunction with the present invention. Figure 4 A schematic diagram of the wedge structure provided by this utility model is shown; Figure 5 A schematic diagram of the structure of the first liner provided by this utility model is shown.

[0018] The above figures include the following reference numerals: 10. Frame; 20. Guide frame; 21. Extension; 30. Suspension components; 31. Wedge; 3101. Insertion hole; 3102. Clearance recess; 311. First plate; 312. Second plate; 32. Axle box; 321. Body section; 322. Bearing section; 33. Second elastic element; 40. First elastic element; 51. First liner plate; 511. Insertion part; 52. Second liner plate; 60. Second wear plate. Detailed Implementation

[0019] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] The welded frame bogie mainly consists of a frame, guide frame, and suspension components. The suspension components include axle boxes, elastic supports, and wedges. Both the guide frame and axle boxes are mounted on the frame. The wheelsets of the rail vehicle pass through the axle boxes and are rotatably mounted relative to them. The elastic supports are positioned between the axle boxes and the wedges to support them. The guide frame is located above the wedges. The side of the wedge facing the guide frame has a wedge-pair friction surface, and the side of the guide frame facing the wedge has an inclined surface. The inclined surface and the wedge-pair friction surface are in rigid contact, meaning there is no elastic positioning stiffness between them. The elastic supports have virtually no longitudinal stiffness, resulting in insufficient dynamic stability of the rail vehicle during operation. Based on these problems, this solution provides a welded frame bogie.

[0021] like Figures 1 to 5 As shown, this utility model embodiment provides a welded frame bogie for use on rail vehicles. The welded frame bogie includes a frame 10, a guide frame 20, a suspension member 30, and a first elastic member 40. The guide frame 20 is disposed on the frame 10 and has an inclined surface; the suspension member 30 is disposed on the frame 10 and includes a wedge 31 located below the inclined surface; the first elastic member 40 is disposed between the inclined surface and the wedge 31 to provide longitudinal and lateral stiffness for the rail vehicle.

[0022] By applying the technical solution of this utility model, a first elastic element 40 is provided between the wedge 31 and the guide frame 20, which provides longitudinal and lateral stiffness to the rail vehicle, thereby improving the dynamic performance and vibration reduction performance of the rail vehicle. The first elastic element 40 provides both longitudinal and lateral stiffness to the rail vehicle through its longitudinal preload force under pre-compression, longitudinal restoring force under dynamic loading, and shear deformation force under lateral force. Furthermore, the first elastic element 40 avoids rigid contact between the inclined surface of the guide frame 20 and the wedge 31, improving the response performance of the welded frame bogie under dynamic loads, while reducing wear and impact between components. The first elastic element 40 helps to improve the overall dynamic performance of the vehicle, reduce wheel-rail impact, improve vibration reduction performance, enhance ride comfort and safety, and extend the service life of key vehicle components.

[0023] As can be understood, longitudinal stiffness, also known as axial stiffness, refers to a vehicle's ability to resist deformation when subjected to loads in the longitudinal direction (i.e., the vehicle's direction of travel). Lateral stiffness, also known as transverse stiffness, refers to a vehicle's ability to resist deformation when subjected to loads in the transverse direction (i.e., perpendicular to the vehicle's direction of travel).

[0024] Furthermore, the welded frame bogie also includes a first liner 51, which is fixed to one side of the first elastic member 40. The first liner 51 abuts against and limits one of the inclined surface and the wedge 31. The first elastic member 40 is usually made of a material with a certain degree of elasticity. When the first elastic member is in direct contact with the inclined surface or the wedge 31 of the guide frame 20, especially under environments with frequent load changes and vibrations, the wear of the first elastic member 40 may be accelerated, reducing its performance and lifespan. The first liner 51, acting as a medium between the first elastic member 40 and the inclined surface or the wedge 31, avoids direct contact between the first elastic member 40 and these two rigid components, thereby reducing wear on the first elastic member 40 and improving its lifespan. Moreover, the above arrangement also enhances the positioning accuracy of the first elastic member 40 between the guide frame 20 and the wedge 31, improving the stability of the welded frame bogie.

[0025] In this embodiment, the first liner 51 is a metal liner. The metal liner has high mechanical strength and durability, and can withstand the dynamic loads generated during the operation of the welded frame bogie, including impact, vibration and friction.

[0026] Specifically, the first liner 51 is fixed to the side of the first elastic member 40 facing the wedge 31. The wedge 31 is provided with a insertion hole 3101, and the first liner 51 is provided with an insertion part 511. The insertion part 511 is inserted into the insertion hole 3101 to restrict the position of the first liner 51 on the wedge 31. The engagement of the insertion hole 3101 and the insertion part 511 can restrict the position of the first liner 51 on the wedge 31, and make the installation and removal of the first liner 51 simple and quick. In addition, the insertion hole 3101 and the insertion part 511 have a simple structure and are easy to manufacture.

[0027] In this embodiment, the wedge 31 is provided with a plurality of insertion holes 3101, each insertion hole 3101 being circular, and the first liner 51 is provided with a plurality of insertion parts 511, each insertion part 511 being cylindrical, and the plurality of insertion holes 3101 and the plurality of insertion parts 511 being provided in a one-to-one correspondence.

[0028] Furthermore, the end of the insertion part 511 away from the first liner 51 is provided with a chamfer so that the insertion part 511 can be smoothly inserted into the insertion hole 3101.

[0029] In some other embodiments of this solution, the insertion hole 3101 is a polygonal hole, and the outline of the insertion part 511 is adapted to the shape of the polygonal hole. For example, the insertion hole 3101 can be a quadrilateral hole, a hexagonal hole, etc.

[0030] Furthermore, the suspension component 30 includes an axle box 32, and the guide frame 20 also includes an extension 21. The extension 21 is located on one side of the inclined surface and extends downward. The wedge 31 includes a first plate 311 and a second plate 312. The first plate 311 and the second plate 312 are arranged at an angle. The position where the first plate 311 and the second plate 312 are connected has a relief recess 3102. The relief recess 3102 is arranged opposite to the extension 21. The first plate 311 faces the inclined surface, and the insertion hole 3101 is provided on the first plate 311. The second plate 312 faces the side wall of the axle box 32 and abuts against the side wall of the axle box 32.

[0031] Specifically, the second plate 312 is vertically arranged, and the angle between the plane containing the first plate 311 and the plane containing the second plate 312 is an acute angle. There are two insertion holes 3101 and two insertion parts 511. The two insertion holes 3101 are spaced apart along the extension direction of the first plate 311, and the two insertion parts 511 are spaced apart along the length direction of the first liner 51. The two insertion holes 3101 and the two insertion parts 511 are arranged in a one-to-one correspondence.

[0032] The extension 21 serves as a reinforcing rib of the guide frame 20, which increases the structural strength of the guide frame 20 and enhances its resistance to deformation. In addition, a clearance recess 3102 is formed at the connection position of the first plate 311 and the second plate 312 to avoid the extension 21. This arrangement can maximize the compactness of the device.

[0033] In this embodiment, the welded frame bogie further includes a second wear plate 60, which is disposed between the second plate 312 and the side wall of the axle box 32. As a wear-resistant material disposed between the second plate 312 and the side wall of the axle box 32, the second wear plate 60 can reduce direct wear between the two. Furthermore, when the second wear plate 60 reaches its wear limit, it can be replaced individually without replacing the entire wedge 31 or axle box 32. This design simplifies the maintenance of the welded frame bogie and reduces maintenance costs.

[0034] Furthermore, the welded frame bogie also includes a second liner 52, which is fixed to the other side of the first elastic member 40 and abuts against the inclined surface. The second liner 52 directly contacts the inclined surface of the guide frame 20, replacing the direct contact between the first elastic member 40 and the inclined surface. Structurally, it supports and stabilizes the first elastic member 40, enhancing its operational reliability, reducing wear, and extending its service life.

[0035] In this embodiment of the solution, the second liner 52 is a metal liner.

[0036] In some embodiments of this solution, the first elastic element 40 includes a spring, which is fixedly connected to the first liner 51 and the second liner 52 respectively.

[0037] When the first elastic element 40 includes springs, there are multiple springs evenly distributed between the first liner 51 and the second liner 52. By evenly distributing multiple springs between the first liner 51 and the second liner 52, the uniformity of the force transmission path can be improved, ensuring a more balanced force transmission. Furthermore, the arrangement of multiple springs provides sufficient stiffness to ensure the structural stability of the bogie under various loads, and the elastic characteristics of the springs can absorb and mitigate vibrations, improving the vehicle's vibration damping effect. In addition, the arrangement of multiple springs distributes the force borne by a single spring, reducing fatigue accumulation in individual springs. Even if the performance of one spring deteriorates due to prolonged operation, the other springs can continue to provide cushioning and support, thereby extending the service life of the springs and reducing the risk of system failure due to the failure of a single spring.

[0038] In this embodiment, the first elastic element 40 includes a rubber pad, which is fixedly connected to the first liner 51 and the second liner 52. Besides providing basic longitudinal and lateral stiffness for the rail vehicle, the rubber pad also exhibits excellent environmental resistance, resisting oil, acid, and alkali corrosion, ensuring the stability of the welded frame bogie in harsh environments. Furthermore, the rubber pad absorbs mechanical vibrations, reducing noise generation and thus improving passenger comfort.

[0039] Furthermore, the rubber pad has an overall rectangular plate structure, and the outline of the inclined surface and the first plate 311 is also roughly rectangular. The area of ​​the rubber pad's outline, the area of ​​the inclined surface, and the area of ​​the outline of the first plate 311 facing the rubber pad are approximately the same. By designing the rubber pad as a rectangular plate structure with the same outline as the inclined surface and the first plate 311, the contact area of ​​each component during force transmission is maximized. When the welded frame bogie encounters dynamic loads, the rubber pad can distribute and transmit forces more evenly, avoiding the generation of local high-stress areas, thereby reducing material fatigue and potential failure risks. Moreover, the rectangular plate design of the rubber pad, and the corresponding rectangular outline of the inclined surface and the first plate 311, makes the design of the welded frame bogie more intuitive and easier.

[0040] Specifically, a rubber pad is formed by vulcanization between the first liner plate 51 and the second liner plate 52. The vulcanization process tightly bonds the rubber to the metal first liner plate 51 and the second liner plate 52, forming a unified structure. This results in a more uniform internal structure of the rubber pad, ensuring more even force transmission between the first liner plate 51 and the second liner plate 52. This helps improve the dynamic response speed of the welded frame bogie, reduces energy loss in the force transmission path, and enhances the stability of the welded frame bogie. Furthermore, the vulcanization process of the rubber pad between the first liner plate 51 and the second liner plate 52 improves the stability of the connection between the rubber pad and the first liner plate 51 and the second liner plate 52.

[0041] In this embodiment, the thickness of the rubber pad is greater than or equal to twice the thickness of the first liner 51; the thickness of the rubber pad is greater than or equal to twice the thickness of the second liner 52. With the space between the wedge 31 and the guide frame 20 fixed, appropriately increasing the thickness of the rubber pad can further improve the longitudinal and lateral stiffness of the welded frame bogie, optimize the dynamic response of the welded frame bogie under different operating conditions, reduce the impact force between the wheel and rail, and improve the operational safety and handling performance of the rail vehicle. Since the hardness and strength of the first liner 51 and the second liner 52 are greater than the hardness and strength of the rubber pad, appropriately reducing the thickness of the first liner 51 and the second liner 52 is sufficient to ensure that the first liner 51 and the second liner 52 function as protectors of the rubber pad.

[0042] In this embodiment of the solution, the thickness of the first liner 51 is the same as the thickness of the second liner 52, and the thickness of the rubber pad is equal to the sum of the thickness of the first liner 51 and the thickness of the second liner 52.

[0043] In some embodiments of this solution, the second liner 52 may be omitted from the welded frame bogie. The welded frame bogie also includes a first wear plate, which is fixed on the inclined surface. The first wear plate abuts against the first elastic member 40 to increase the friction between the first wear plate and the first elastic member 40.

[0044] In this embodiment, the welded frame bogie includes both a second liner 52 and a first wear plate. The first wear plate is fixed to the inclined surface and abuts against the second liner 52 to increase the friction between them. The first wear plate has high wear resistance and a high coefficient of friction. When the first wear plate abuts against the second liner 52, it increases the friction between them. This helps maintain the stable positioning of the second liner 52 during vehicle operation, especially under dynamic loads, thereby maintaining the stable positioning of the wedge 31, reducing unnecessary slippage of the wedge 31, and thus improving the dynamic response and handling performance of the bogie.

[0045] In this embodiment, the axle box 32 includes a body portion 321 and two support portions 322. The two support portions 322 are disposed opposite each other at the bottom end of the body portion 321, and the support portions 322 extend horizontally. A guide frame 20 is disposed above one of the support portions 322. A second elastic member 33, a wedge 31, a first liner 51, a rubber pad, and a second liner 52 are disposed between the guide frame 20 and the corresponding support portion 322, arranged sequentially from bottom to top. The second elastic member 33 is used to support the wedge 31, and a second wear plate 60 is disposed between the second plate 312 of the wedge 31 and the side wall of the body portion 321.

[0046] This utility model embodiment also provides a rail vehicle, including the above-described welded frame bogie.

[0047] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: 1. In traditional frame bogies, the inclined wedge 31 and the inclined surface of the guide frame 20 are in direct rigid contact, and the dynamic performance needs to be improved. This solution provides longitudinal and lateral stiffness to the rail vehicle by setting a first elastic element 40 between the inclined wedge 31 and the guide frame 20, thereby improving the vibration reduction performance of the welded frame bogie and the dynamic stability of the vehicle. 2. The arrangement of the first liner 51 and the second liner 52 provides protection for the first elastic element 40, reduces the wear of the first elastic element 40, and improves the working reliability and service life of the first elastic element 40. 3. The first liner 51 and the wedge 31 are inserted into each other, which optimizes the ease of installation of the first liner 51 and the wedge 31.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A welded frame bogie, characterized in that, The welded frame bogie, used in rail vehicles, includes: Framework (10); A guide frame (20) is disposed on the frame (10), and the guide frame (20) has an inclined surface; A suspension member (30) is disposed on the frame (10), the suspension member (30) including a wedge (31) located below the inclined surface; A first elastic element (40) is disposed between the inclined surface and the wedge (31) to provide longitudinal and lateral stiffness for the rail vehicle.

2. The welded frame bogie according to claim 1, characterized in that, The welded frame bogie also includes: The first liner (51) is fixed to one side of the first elastic member (40), and the first liner (51) abuts and limits one of the inclined surface and the wedge (31).

3. The welded frame bogie according to claim 2, characterized in that, The first liner (51) is fixed on the side of the first elastic member (40) facing the wedge (31). The wedge (31) is provided with a insertion hole (3101), and the first liner (51) is provided with an insertion part (511). The insertion part (511) is inserted into the insertion hole (3101) to limit the position of the first liner (51) on the wedge (31).

4. The welded frame bogie according to claim 3, characterized in that, The wedge (31) is provided with a plurality of insertion holes (3101), each of which is circular. The first liner (51) is provided with a plurality of insertion parts (511), each of which is cylindrical. The plurality of insertion holes (3101) and the plurality of insertion parts (511) are provided in a one-to-one correspondence. The insertion hole (3101) is a polygonal hole, and the outline of the insertion part (511) is adapted to the shape of the polygonal hole.

5. The welded frame bogie according to claim 3, characterized in that, The suspension component (30) includes an axle box (32), and the guide frame (20) also includes an extension (21). The extension (21) is located on one side of the inclined surface and extends downward. The wedge (31) includes a first plate (311) and a second plate (312). The first plate (311) and the second plate (312) are arranged at an angle. The position where the first plate (311) and the second plate (312) are connected has a relief recess (3102). The relief recess (3102) is directly opposite to the extension (21). The first plate (311) faces the inclined surface. The insertion hole (3101) is provided on the first plate (311). The second plate (312) faces the side wall of the axle box (32) and abuts against the side wall of the axle box (32).

6. The welded frame bogie according to any one of claims 2 to 5, characterized in that, The welded frame bogie also includes: The second liner (52) is fixed on the other side of the first elastic member (40), and the second liner (52) abuts against the inclined surface.

7. The welded frame bogie according to claim 6, characterized in that, The first elastic element (40) includes: Rubber pads, which are fixedly connected to the first liner (51) and the second liner (52) respectively; or, Springs are fixedly connected to the first liner (51) and the second liner (52), respectively.

8. The welded frame bogie according to claim 7, characterized in that, When the first elastic element (40) includes the rubber pad, the rubber pad is formed by vulcanization process by placing rubber between the first liner (51) and the second liner (52).

9. The welded frame bogie according to claim 8, characterized in that, The thickness of the rubber pad is greater than or equal to twice the thickness of the first liner (51); and / or, The thickness of the rubber pad is greater than or equal to twice the thickness of the second liner (52).

10. The welded frame bogie according to any one of claims 1 to 5, characterized in that, The welded frame bogie also includes: A first wear plate is fixed to the inclined surface, and the first wear plate abuts against the first elastic member (40) to increase the friction between the first wear plate and the first elastic member (40); or, A shaft box (32) and a second elastic member (33) are provided on the frame (10), the shaft box (32) being disposed on the frame (10) and the second elastic member (33) being disposed between the shaft box (32) and the wedge (31) to support the wedge (31).

11. A rail vehicle, characterized in that, Including the welded frame bogie as described in any one of claims 1 to 10.

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