Elastic framework and bogie with same

Abstract

The utility model discloses an elastic framework and a bogie with the elastic framework, and belongs to the field of rail transit vehicle bogies, and the elastic framework is based on composite materials and comprises a cross beam; the side beams are arranged at the two ends of the cross beam; the positioning connecting structure is formed at the end part of the cross beam and is used for being detachably and fixedly connected with the side beam; the positioning and connecting structure comprises a connecting part, the structure of the connecting part is matched with the bending shape of the longitudinal axis of the side beam, the two ends of the side beam can be suspended outside the cross beam through the connecting part, and the connecting part is provided with a connecting cavity used for wrapping the outer portion of the side beam in a shape following mode and fixing the side beam so that the side beam can elastically support a vehicle body in a vibration absorption mode. In addition to the bearing capacity, the utility model also has the beneficial effects of elasticity, vibration reduction characteristic and light weight.

Description

Technical Field

[0001] This utility model relates to the field of rail transit vehicle bogie technology, and in particular to an elastic frame and a bogie having the elastic frame. Background Technology

[0002] A bogie is a running gear that supports the car body of a railcar and allows it to rotate relative to the car body. It typically includes a frame, wheelset axle box assembly, spring damping devices, and basic braking devices. For motor cars, the bogie also includes a drive unit. The frame is the core component of the bogie, located between the primary and secondary suspension systems, integrating all bogie components and bearing the load.

[0003] The main structure of the bogie frame generally consists of side beams, cross beams, and various mounting brackets. Currently, the main structure of existing rail train bogie frames is a rigid structure, typically welded from steel plates. The side beams are welded steel plate box-type structures, and the cross beams are welded steel plate box-type structures or seamless steel pipes. The frame's cross beams and side beams are connected by welding. Simultaneously, various mounting brackets such as brake hangers, shock absorber mounts, traction motor mounts, gearbox hangers, and lateral stop mounts are welded onto the frame. The welded frame forms a rigid whole.

[0004] As a crucial component of rail transit equipment, the technological development direction and trend of bogies include high-speed passenger transport and lightweight structure, with weight reduction being an important aspect of high-speed train bogies. Traditional high-speed train bogie frames are constructed primarily of welded steel plates, with various mounting brackets welded onto the frame, leaving limited room for further weight reduction. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the existing technology and provide an elastic frame and a bogie with the elastic frame, so as to solve the problem that the bogie frame in the existing technology only has rigid load-bearing capacity and the space for weight reduction is limited.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The elastic frame disclosed in this utility model is based on composite materials and includes:

[0008] beam;

[0009] Side beams disposed at both ends of the crossbeam; and

[0010] A positioning connection structure is formed at the end of the crossbeam for detachably and securely connecting the side beam;

[0011] The positioning connection structure includes a connection part that is adapted to the bending shape of the longitudinal axis of the side beam and allows both ends of the side beam to be suspended outside the crossbeam. The connection part has a connection cavity for conformally covering the outside of the side beam and fixing the side beam so that the side beam elastically and shock-absorbingly supports the vehicle body.

[0012] Furthermore, the side beam has a concave shape in the middle along its length, and the middle part of the side beam is positioned and connected to the connecting part through an installation positioning structure. The lower part of the connecting cavity of the connecting part has an opening.

[0013] Furthermore, the connecting structure includes a lower positioning plate that covers the opening of the connecting cavity. The upper surface of the lower positioning plate and the upper cover surface of the connecting cavity form a mounting surface that fits with the mounting positioning structure of the side beam. The mounting surface has mounting positioning holes that mate with the boss of the mounting positioning structure.

[0014] Furthermore, the positioning structure includes an upper clamping plate and a lower clamping plate clamped and installed in the middle of the side beam, and the outer surfaces of the upper clamping plate and the lower clamping plate both have the boss.

[0015] Furthermore, the connection structure also includes a rotating arm positioning seat that covers the opening of the connection cavity, and the rotating arm positioning seat is distributed on both sides of the lower positioning plate.

[0016] Furthermore, the lower positioning plate and the rotating arm positioning seat are both provided with positioning steps that can extend into the connecting cavity along the length direction, and the lower positioning plate and the rotating arm positioning seat are connected to the connecting part by positioning pins.

[0017] Furthermore, the lower part of the connecting portion has flanges formed at both the inner and outer ends of the connecting cavity, and the flanges have mounting holes.

[0018] Furthermore, the crossbeam is integrally cast, and several mounting seats are integrally formed on the crossbeam.

[0019] Furthermore, the side beam is made of non-metallic composite material, and the crossbeam is made of aluminum alloy or aluminum-based composite material.

[0020] In the above technical solution, the elastic frame provided by this utility model has the following advantages:

[0021] 1) The elastic frame designed in this utility model uses a separate, detachable, and fixed connection for the crossbeams and side beams, forming an integrated load-bearing and vibration-damping elastic frame after connection. Applied to railway train bogies, this design breaks through the traditional framework of welded steel plate structures used for many years, realizing the transformation of the frame from steel to composite materials and from a rigid structure to an elastic structure. This achieves weight reduction in the bogie frame.

[0022] 2) The elastic frame side beam designed in this utility model is made of a composite material with elasticity and vibration reduction properties. It adopts a low-density composite material with sufficient strength and is constructed as a curved side beam with a concave shape in the middle, similar to a leaf spring. This makes the side beam elastic and plays a vertical load-bearing role. It breaks through the traditional framework of steel structure frame used for many years and realizes the transformation of the frame from steel material to composite material and from rigid structure to elastic structure.

[0023] 3) The elastic frame side beam designed in this utility model has elasticity and vibration reduction functions, thus realizing the integration of the suspension vibration reduction function of the bogie primary spring into the frame, which can eliminate the primary spring of the traditional bogie and further reduce the total weight of the bogie.

[0024] 4) The elastic frame beam designed in this utility model is made of low-density material, such as aluminum alloy or aluminum-based composite material, which breaks through the traditional form of steel frame used for many years. It can reduce the weight of the bogie frame. The beam adopts a cast integrated structure, which breaks through the method of steel plate welding structure used for many years. It is conducive to mass production and manufacturing and reduces costs.

[0025] 5) The elastic frame designed in this utility model is different from the traditional frame's overall welded structure. The connection design between the frame's crossbeams and side beams is a unique method that uses a positioning connection structure and bolts for connection. Through the cooperation of components such as the lower positioning plate, the rotating arm positioning seat, and the upper and lower clamping plates of the side beams, the side beams are positioned and installed, and the frame's crossbeams and side beams are connected, so that the frame is connected into an integral structure. If the crossbeams and side beams are damaged in the future, they can be maintained and replaced separately.

[0026] This utility model also discloses a bogie, which includes the elastic frame described above and has the same beneficial effects as the elastic frame, which will not be described in detail here. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0028] Figure 1 Axonometric drawing of the flexible frame;

[0029] Figure 2 This is the main view of the flexible framework;

[0030] Figure 3 Top view of the flexible frame;

[0031] Figure 4Left view of the flexible frame;

[0032] Figure 5 This is a schematic diagram of the side beam structure of the elastic frame;

[0033] Figure 6 This is a schematic diagram of a flexible frame beam structure;

[0034] Figure 7 This is a partial view of the end structure of the flexible frame beam;

[0035] Figure 8 This is a schematic diagram of the positioning and connection structure in the middle of the side beam of the elastic frame;

[0036] Figure 9 A partial longitudinal sectional view of the positioning and connection structure at the middle of the side beam of the elastic frame;

[0037] Figure 10 This is a partial transverse sectional view of the positioning and connection structure in the middle of the side beam of the elastic frame.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Side beam; 2. Crossbeam; 3. Positioning connection structure; 4. Upper clamping plate; 5. Lower clamping plate; 6. Traction mounting seat; 7. Secondary lateral damper seat; 8. Traction motor mounting seat; 9. Gearbox hanger; 10. Lateral stop seat; 11. Lifting seat; 12. Secondary vertical damper seat; 13. Anti-hunting damper seat; 14. Torsion bar mounting seat; 15. Brake hanger; 16. Secondary spring mounting seat; 17. Top cover; 18. Inner facade; 19. Outer facade; 20. Mounting surface; 21. Mounting positioning hole; 22. Mounting hole; 23. Lower positioning plate; 24. Swing arm positioning seat; 25. Boss; 26. Boss; 27. Positioning step; 28. Positioning pin;

[0040] 100. Connecting part;

[0041] 200. Connecting cavity. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0043] See Figure 1-5 As shown;

[0044] A utility model elastic frame, based on composite materials, includes: a crossbeam 2 and side beams 1 disposed at both ends of the crossbeam 2, and a positioning connection structure 3;

[0045] The positioning connection structure 3 is formed at the end of the crossbeam 2 for detachably and fixably connecting the side beam 1. The positioning connection structure 3 includes a connection part 100 whose structure is adapted to the bending shape of the longitudinal axis of the side beam 1 and allows the two ends of the side beam 1 to be suspended outside the crossbeam 2. The connection part 100 has a connection cavity 200 for conformally covering the outside of the side beam 1 and fixing the side beam 1 so that the side beam 1 elastically and shock-absorbingly supports the vehicle body.

[0046] This elastic frame is based on composite materials and has an overall H-shaped structure. The crossbeam 2 and side beam 1 are connected separately and can be detachably fixed. After connection, they form an integrated load-bearing and vibration-damping elastic frame. This elastic frame realizes the transformation of the frame from a rigid structure to an elastic structure, and at the same time achieves the purpose of reducing the weight of the frame. The crossbeam 2 serves as the main support structure of the frame, and the side beam 1 serves as the elastic structure. The elastic structure uses non-metallic composite materials with elastic and vibration-damping properties, while the support structure uses low-density materials. The low material density can effectively reduce the weight of the bogie frame. At the same time, the traditional bogie uses primary springs that are independent of the steel frame to play the role of primary suspension vibration damping. However, because the elastic frame has elastic and vibration-damping properties, it integrates the suspension vibration damping function of the primary springs into the frame. Therefore, the primary springs of the traditional bogie can be eliminated, which can further reduce the total weight of the bogie.

[0047] Preferably, the side beam 1 has a concave structure in the middle along the length direction, and the middle part of the side beam 1 is positioned and connected to the connecting part 100 of the cross beam 2 through the installation positioning structure. The connecting cavity 200 of the connecting part 100 has an opening at the bottom.

[0048] For specific embodiments, see Figure 5 As shown, the side beam 1 of the frame is designed as a composite material, such as carbon fiber. The composite material has a set stiffness, which makes the side beam elastic and vibration damping characteristics. At the same time, the composite material has sufficient strength, which enables the frame to bear vertical loads and play a vertical bearing role. The side beam 1 has a concave structure in the middle of its length direction, which is similar to a leaf spring. More specifically, the two side walls of the concave structure are inclined, and the top and bottom of the side walls are rounded to the horizontal section. The upper clamping plate 4 and the lower clamping plate 5 of the side beam 1 are clamped and installed in the middle of the side beam 1 to form an installation and positioning structure.

[0049] See Figure 6As shown, the crossbeam 2 of the frame is designed with a low-density material, using aluminum alloy or aluminum-based composite materials, and adopts a cast-in-place structure. Multiple mounting seats are integrally formed on the main body of the crossbeam 2, which reduces the weight of the bogie frame and facilitates mass production. The middle beam of the crossbeam 2 is a box-shaped structure beam, equipped with mounting seats for traction mounting 6, secondary lateral damper mounting 7, traction motor mounting 8, gearbox lifting mounting 9, lateral stop mounting 10, and lifting mounting 11. A secondary vertical damper mounting 12 is provided at the transition between the middle beam of the crossbeam 2 and the ends of the crossbeam 2. The connecting parts 100 at both ends of the crossbeam 2 are continuous. At the junction of the side beam 1, the middle part of the side beam 1 is positioned and connected to the connecting part 100 through the installation positioning structure. The lower part of the connecting cavity 200 of the connecting part 100 has an opening, that is, the bottom end of the connecting cavity 200 is an open structure with a U-shaped structure. When the crossbeam 2 and the side beam 1 are assembled, the side beam 1 is inserted through the opening of the connecting cavity 200. The outer side of the connecting part 100 at the end of the crossbeam 2 is provided with an anti-hunting damper seat 13 and a torsion bar mounting seat 14. The inner side of the connecting part 100 at the end of the crossbeam 2 is provided with a brake hanger 15. The upper part of the connecting part 100 at the end of the crossbeam 2 is provided with a secondary spring mounting seat 16.

[0050] See Figure 7 As shown, the connecting cavity 200 at the end of the crossbeam 2 has three surfaces, including an upper cover surface 17, an inner surface 18, and an outer surface 19, which together form a U-shaped structure. The interior of the connecting cavity 200 has a mounting surface 20, on which mounting positioning holes 21 are provided. Mounting holes 22 are provided on the mounting surfaces at the lower flange positions of the inner surface 18 and the outer surface 19.

[0051] See Figure 8 As shown:

[0052] Preferably, the connecting structure 3 includes a lower positioning plate 23 that covers the opening of the connecting cavity 200 and a rotating arm positioning seat 24. The rotating arm positioning seat 24 is distributed on both sides of the lower positioning plate 23. The upper surface of the lower positioning plate 23 and the upper cover surface 17 of the connecting cavity 200 form a mounting surface 20 that fits with the mounting positioning structure of the side beam 1. The mounting surface 20 has mounting positioning holes 21 that cooperate with the boss of the mounting positioning structure.

[0053] Preferably, the positioning structure includes an upper clamping plate 4 and a lower clamping plate 5 clamped and installed in the middle of the side beam 1. The outer surfaces of the upper clamping plate 4 and the lower clamping plate 5 are both provided with bosses, which are used to position the beam by engaging with the mounting positioning holes 21.

[0054] For specific embodiments, see Figure 8 As shown, the lower positioning plate 23 and the rotating arm positioning seat 24 of the positioning connection structure 3, as well as the upper clamping plate 4 and the lower clamping plate 5 of the side beam 1, are all made of low-density materials, such as aluminum alloy or aluminum-based composite materials.

[0055] See Figure 9As shown, during assembly, the upper clamping plate 4 and the lower clamping plate 5 of the side beam 1 are installed in the middle of the side beam 1 for installation and positioning of the middle of the side beam 1. The side beam 1 with the upper clamping plate 4 and the lower clamping plate 5 is installed onto the cross beam 2 from the lower opening and installed in the connecting cavity 200 at the end of the cross beam 2. The positioning with the cross beam 2 is achieved through the boss 25 of the upper clamping plate 4 and the mounting positioning hole 21 of the upper cover surface 17 inside the connecting cavity 200 at the end of the cross beam 2.

[0056] See Figure 9 As shown, the lower positioning plate 23 of the positioning connection structure 3 of the frame is located at the lower part of the side beam 1 and is bolted to the connecting part 100 at the end of the cross beam 2, sealing the connecting cavity 200 and pressing against the lower clamping plate 5 in the middle of the side beam 1. The boss 26 on the lower clamping plate 5 and the positioning hole of the lower positioning plate 23 cooperate to achieve positioning. The upper clamping plate 4 in the middle of the side beam 1 is tightly installed on the mounting surface 20 inside the connecting cavity 200, so that the side beam 1 and the cross beam 2 are fixed together. At the same time, after the lower positioning plate 23 is connected to the connecting part 100 at the end of the cross beam 2, a box-shaped structure is formed, which makes the structure stable and ensures the structural strength.

[0057] See Figure 9 As shown, the swing arm positioning seat 24 of the positioning connection structure 3 of the frame is located at both ends of the connecting cavity 200 at the lower part of the side beam 1 and the end of the crossbeam 2, and is connected to the connecting part 100 at the end of the crossbeam 2 by bolts, sealing the connecting cavity 200, so that the bogie frame has the function of positioning and guiding the wheelset. At the same time, after the swing arm positioning seat 24 is connected to the connecting part 100 at the end of the crossbeam 2 and seals the connecting cavity, it also forms a box-shaped structure, which makes the structure stable and ensures the structural strength.

[0058] See Figure 10 As shown:

[0059] Preferably, the lower positioning plate 23 and the rotating arm positioning seat 24 are both provided with positioning steps 27 that can extend into the connecting cavity 200 along the length direction, and the lower positioning plate 23 and the rotating arm positioning seat 24 are connected to the connecting part 100 by positioning pins 28.

[0060] For specific embodiments, see Figure 10 As shown, the lower positioning plate 23 and the swing arm positioning seat 24 of the positioning connection structure 3 of the frame are both equipped with positioning steps 27 in the horizontal direction. At the same time, when connected to the connection part 100 at the end of the crossbeam 2, a positioning pin 28 is also installed, so that the box-shaped structure formed after the connection part 100 at the end of the crossbeam 2 is installed is positioned and stable in the horizontal direction, so that the connection structure between the crossbeam 2 and the side beam 1 is stable and the structural strength is guaranteed.

[0061] The elastic frame disclosed in this utility model uses a composite material with sufficient strength, elasticity, and vibration damping properties instead of steel. By utilizing the elasticity and vibration damping properties of the composite material, the frame not only has load-bearing capacity but also elasticity and vibration damping functions. The integrated casting of the crossbeams is achieved by casting the parts in one go, followed by a small amount of machining to complete the overall structure. Compared with the split structure, this avoids the disadvantages of welding, such as long process cycle, many steps, and large welding deformation. It has the advantages of structural stability, shorter process, high production efficiency, and low cost.

[0062] The utility model bogie includes the aforementioned elastic frame, which has the same beneficial effects as the elastic frame, and will not be described in detail here.

[0063] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An elastic framework based on composite materials, characterized in that, include: A crossbeam (2) and side beams (1) disposed at both ends of the crossbeam (2); as well as A positioning connection structure (3) is formed at the end of the crossbeam (2) for detachably and securely connecting the side beam (1); The positioning connection structure (3) includes a connection part (100) that is adapted to the bending shape of the longitudinal axis of the side beam (1) and allows the two ends of the side beam (1) to be suspended outside the cross beam (2). The connection part (100) has a connection cavity (200) for conformally covering the outside of the side beam (1) and fixing the side beam (1) so that the side beam (1) elastically and shock-absorbingly supports the vehicle body.

2. The elastic frame according to claim 1, characterized in that; The side beam (1) has a concave structure in the middle along its length. The middle part of the side beam (1) is positioned and connected to the connecting part (100) through an installation positioning structure. The lower part of the connecting cavity (200) of the connecting part (100) has an opening.

3. The elastic frame according to claim 2, characterized in that... ； The connecting structure (3) includes a lower positioning plate (23) that covers the opening of the connecting cavity (200). The upper surface of the lower positioning plate (23) and the upper cover surface (17) of the connecting cavity (200) form a mounting surface (20) that fits with the mounting positioning structure of the side beam (1). The mounting surface (20) has a mounting positioning hole (21) that mates with the boss of the mounting positioning structure.

4. The elastic frame according to claim 3, characterized in that... ； The positioning structure includes an upper clamping plate (4) and a lower clamping plate (5) clamped and installed in the middle of the side beam (1), and the outer surfaces of the upper clamping plate (4) and the lower clamping plate (5) both have the boss.

5. The elastic frame according to claim 3, characterized in that... ； The connecting structure (3) also includes a rotating arm positioning seat (24) that covers the opening of the connecting cavity (200), and the rotating arm positioning seat (24) is distributed on both sides of the lower positioning plate (23).

6. The elastic frame according to claim 5, characterized in that... ； The lower positioning plate (23) and the rotating arm positioning seat (24) are both provided with positioning steps (27) that can extend into the connecting cavity (200) along the length direction, and the lower positioning plate (23) and the rotating arm positioning seat (24) are connected to the connecting part (100) by positioning pins (28).

7. The elastic frame according to claim 5, characterized in that... ； The lower part of the connecting part (100) has flanges at the ends of the inner facade (18) and outer facade (19) of the connecting cavity (200), and the flanges are provided with mounting holes (22).

8. The elastic frame according to any one of claims 1-7, characterized in that; The crossbeam (2) is integrally cast, and several mounting seats are integrally formed on the crossbeam (2).

9. The elastic frame according to any one of claims 1-7, Its characteristics are: The side beam (1) is a non-metallic composite material, and the crossbeam (2) is an aluminum alloy or an aluminum-based composite material.

10. A bogie, characterized in that, Includes the elastic framework described in any one of claims 1-9 above.

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