Elastic framework and bogie with same

Abstract

The invention 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 a composite material 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 elastic and vibration-damping composite material has the beneficial effects of elasticity, vibration-damping characteristics and light weight.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit vehicle bogies, and in particular to an elastic frame and a bogie having the elastic frame. Background Art

[0002] The bogie is a running device that supports the train body and can rotate relative to the train body. It usually includes a frame, axle box device, a spring damping device, and a basic brake device. The EMU bogie also includes a drive device. Among them, the frame is the core component of the bogie, located between the primary suspension and secondary suspension devices of the bogie, integrating various components of the bogie and bearing the load.

[0003] The main structure of the frame is generally composed of side beams, cross beams and various mounting seats. The main structure of the existing rail train bogie frame is a rigid structure, generally welded with 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 cross beams and side beams are connected by welding. At the same time, various mounting seats such as brake hangers, shock absorber seats, traction motor mounts, gear box hangers, and transverse stoppers are welded on the frame. The welded frame forms a rigid whole.

[0004] As an important part of rail transportation equipment, the technical development direction and trend of bogies include high-speed passenger transportation and lightweight structure. Weight reduction is an important part of high-speed train bogies. The main structure of the traditional high-speed train bogie frame is welded with steel plates, and various mounting seats are welded on the frame, which makes the space for further weight reduction of the existing frame structure limited. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide an elastic frame and a bogie having the elastic frame, so as to solve the problem that the bogie frame in the prior art only has a rigid bearing capacity and the weight reduction space is limited.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The elastic framework disclosed in the present invention is based on a composite material and comprises:

[0008] beam;

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

[0010] A positioning connection structure formed at the end of the cross beam and used for detachably fixing and connecting the side beam;

[0011] The positioning connection structure includes a connection portion which is adapted to the curved shape of the longitudinal axis of the side beam and can suspend the two ends of the side beam outside the cross beam. The connection portion has a connection cavity which is used to conformally wrap around the outside of the side beam and fix the side beam so that the side beam can elastically and vibration-absorbingly support the vehicle body.

[0012] Furthermore, the side beam structure is concave in the middle along the length direction, the middle of the side beam is positioned and connected to the connecting part by installing a positioning structure, and an opening is formed at the lower part of the connecting cavity of the connecting part.

[0013] Furthermore, the connecting structure includes a lower positioning plate that covers the opening of the connecting cavity, and the upper surface of the lower positioning plate and the upper cover surface of the connecting cavity form an installation surface that fits with the installation positioning structure of the side beam, and the installation surface has an installation positioning hole that cooperates with the boss of the installation positioning structure.

[0014] Furthermore, the positioning structure includes an upper clamping plate and a lower clamping plate which are clamped and installed at the middle part 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 positioning round pins are connected between the lower positioning plate and the rotating arm positioning seat and the connecting portion.

[0017] Furthermore, flanges are formed at the ends of the inner and outer facades of the lower portion of the connection portion, and mounting holes are provided on the flanges.

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

[0019] Furthermore, the side beams are made of non-metallic composite materials, and the cross beams are made of aluminum alloy materials or aluminum-based composite materials.

[0020] In the above technical solution, the elastic frame provided by the present invention has the following beneficial effects:

[0021] 1) The elastic frame designed by the present invention adopts split type fixed connection between the cross beam and the side beam, which can be disassembled and assembled, and then forms an integrated elastic frame for load bearing and vibration reduction, which is applied to the bogie of railway trains, breaking through the traditional frame of steel plate welding structure frame applied for many years, realizing the transformation of the frame from steel material to composite material, and from rigid structure to elastic structure, realizing the weight reduction of the bogie frame;

[0022] 2) The elastic frame side beam designed by the present invention is made of a composite material with elastic and vibration-damping properties. The composite material is low-density and has sufficient strength. The curved side beam is concave in the middle, similar to a leaf spring, so that the side beam has elasticity and plays a vertical bearing role. This breaks through the traditional framework of steel structure frames that have been 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 by the present invention has elasticity and vibration reduction functions, thereby integrating the suspension vibration reduction function of the primary spring of the bogie into the frame, eliminating the primary spring of the traditional bogie and further reducing the total weight of the bogie;

[0024] 4) The elastic frame crossbeam designed by the present invention is made of low-density material, such as aluminum alloy or aluminum-based composite material, which breaks through the traditional form of steel frame for many years and can reduce the weight of the bogie frame. The crossbeam adopts a cast integrated structure, which breaks through the traditional steel plate welding structure for many years, is conducive to mass production and reduces costs;

[0025] 5) The elastic frame designed by the present invention is different from the integrally welded structure of the traditional frame. The connection design of the frame cross beam and the side beam is a unique way of bolt connection using a positioning connection structure. The side beam is positioned and installed through the cooperation of the lower positioning plate, the swing arm positioning seat, and the upper and lower clamping plates of the side beams, and the connection between the frame cross beam and the side beams is realized, so that the frame is connected into an integral structure. The cross beam and the side beam can be maintained and replaced separately in the later stage if they are damaged;

[0026] The present invention 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is an axonometric drawing of the elastic frame;

[0029] Figure 2 The main view is a flexible frame;

[0030] Figure 3 It is a top view of the elastic frame;

[0031] Figure 4 It is the left view of the elastic frame;

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

[0033] Figure 6 It is a schematic diagram of the elastic frame beam structure;

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

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

[0036] Fig. 9 It is a partial longitudinal cross-sectional view of the middle positioning connection structure of the elastic frame side beam;

[0037] Fig.10 It is a partial transverse cross-sectional view of the middle positioning connection structure of the elastic frame side beam.

[0038] Description of reference numerals:

[0039] 1. Side beam; 2. Cross beam; 3. Positioning connection structure; 4. Upper splint; 5. Lower splint; 6. Traction mounting seat; 7. Secondary lateral shock absorber seat; 8. Traction motor mounting seat; 9. Gear box hanger; 10. Horizontal stop seat; 11. Lifting seat; 12. Secondary vertical shock absorber seat; 13. Anti-snaking shock absorber seat; 14. Torsion bar mounting seat; 15. Brake hanger 16. Secondary spring mounting seat; 17. Upper cover surface; 18. Inner facade; 19. Outer facade; 20. Mounting surface; 21. Mounting positioning hole; 22. Mounting hole; 23. Lower positioning plate; 24. Swivel arm positioning seat; 25. Boss; 26. Boss; 27. Positioning step; 28. Positioning round pin;

[0040] 100, connecting part;

[0041] 200. Connecting cavity. DETAILED DESCRIPTION

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

[0043] See also Figure 1-5 As shown;

[0044] The invention discloses an elastic frame based on a composite material, the elastic frame comprising: a cross beam 2 and side beams 1 arranged at both ends of the cross beam 2, and a positioning connection structure 3;

[0045] The positioning connection structure 3 is formed at the end of the cross beam 2 for detachably fixing and connecting the side beam 1. The positioning connection structure 3 includes a connection portion 100 which is adapted to the curved shape of the longitudinal axis of the side beam 1 and can suspend both ends of the side beam 1 outside the cross beam 2. The connection portion 100 has a connection cavity 200, which is used to conformally cover the outside of the side beam 1 and fix the side beam 1 so that the side beam 1 can elastically and vibration-absorbingly support the vehicle body.

[0046] The elastic frame is based on composite materials and has an H-shaped structure as a whole. The crossbeam 2 and the side beam 1 are fixedly connected in a split manner that can be detached and assembled, and after connection, an integrated elastic frame with load bearing and vibration reduction is formed. The 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 supporting structure of the frame, and the side beam 1 serves as the elastic structure. The elastic structure part adopts a non-metallic composite material with elastic and vibration reduction properties, and the supporting structure part adopts a low-density material with low material density, which can effectively reduce the weight of the bogie frame. At the same time, the traditional bogie utilizes a primary spring that is independent of the steel frame to play a primary suspension vibration reduction role, and the elastic frame has elastic and vibration reduction characteristics, so the suspension vibration reduction function of the primary spring is integrated into the frame. Therefore, the primary spring of the traditional bogie can be eliminated, which can further reduce the total weight of the bogie.

[0047] Preferably, the side beam 1 is concave in the middle along the length direction, and the middle of the side beam 1 is positioned and connected to the connecting portion 100 of the cross beam 2 by installing a positioning structure, and an opening is formed at the lower portion of the connecting cavity 200 of the connecting portion 100.

[0048] In the specific embodiment, see Figure 5 As shown, the side beam 1 of the frame is designed to be a composite material, such as carbon fiber and other materials. The composite material has a set stiffness, so that the side beam has elastic and vibration-damping characteristics. At the same time, the composite material has sufficient strength, so that the frame can bear vertical loads and play a vertical bearing role. The side beam 1 is concave in the middle of the length direction, and its shape is similar to that of a leaf spring. More specifically, the two side walls of the concave structure are inclined, and the top and bottom ends of the side walls are both arc-shaped transitions with the horizontal section. The upper clamp 4 and the lower clamp 5 of the side beam 1 are clamped and installed in the middle of the side beam 1 to form an installation positioning structure.

[0049] See also Figure 6As shown, the cross beam 2 of the frame is designed to be a low-density material, made of aluminum alloy material or aluminum-based composite material, and adopts a cast integrated structure. A plurality of mounting seats are integrally formed on the main body of the cross beam 2, which can reduce the weight of the bogie frame and facilitate mass production. The middle beam body of the cross beam 2 is a box-type structure beam body, which is provided with a traction mounting seat 6, a secondary lateral shock absorber seat 7, a traction motor mounting seat 8, a gear box hanging seat 9, a lateral stop seat 10, a lifting seat 11 and other mounting seats. A secondary vertical shock absorber seat 12 is provided at the transition portion between the middle beam body of the cross beam 2 and the end of the cross beam 2. The connecting parts 100 at both ends of the cross beam 2 are connected. At the part connected to 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, and an opening is formed at the lower part of the connecting cavity 200 of the connecting part 100, that is, the bottom end of the connecting cavity 200 is an open structure, and the shape is a U-shaped structure. When the cross beam 2 and the side beam 1 are assembled, the side beam 1 is installed through the opening of the connecting cavity 200, and an anti-snaking shock absorber seat 13 and a torsion bar mounting seat 14 are provided on the outer side of the connecting part 100 at the end of the cross beam 2, a brake hanger 15 is provided on the inner side of the connecting part 100 at the end of the cross beam 2, and a secondary spring mounting seat 16 is provided on the upper part of the connecting part 100 at the end of the cross beam 2.

[0050] See also Figure 7 As shown, the connection cavity 200 at the end of the cross beam 2 has three surfaces, including an upper cover surface 17, an inner facade 18 and an outer facade 19, and the three surfaces are surrounded to form a U-shaped structure. A mounting surface 20 is provided inside the connection cavity 200, and a mounting positioning hole 21 is provided on the mounting surface 20. The mounting surface at the lower flange position of the inner facade 18 and the outer facade 19 is provided with a mounting hole 22.

[0051] See also Figure 8 As shown:

[0052] Preferably, the connecting structure 3 includes a lower positioning plate 23 and a pivot arm positioning seat 24 for sealing the opening of the connecting cavity 200, and the pivot 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, and the mounting surface 20 has a mounting positioning hole 21 that cooperates 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 which are 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 have bosses which are positioned by cooperating with the mounting positioning holes 21 .

[0054] In the specific embodiment, see Figure 8 As shown, the lower positioning plate 23 of the positioning connection structure 3, the rotating arm positioning seat 24, and 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 materials or aluminum-based composite materials.

[0055] See also Fig. 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, which are used to install and position 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 on the cross beam 2 from the lower opening part, installed in the connecting cavity 200 at the end of the cross beam 2, and positioned with the cross beam 2 through the boss 25 of the upper clamping plate 4 and the installation positioning hole 21 of the upper cover surface 17 in the connecting cavity 200 at the end of the cross beam 2;

[0056] See also Fig. 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, connected to the connection part 100 at the end of the cross beam 2 by bolts, covers the connection cavity 200, and presses 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 internal mounting surface 20 of the connection 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 connection part 100 at the end of the cross beam 2, a box-type structure is formed, which makes the structure stable and ensures the structural strength.

[0057] See also Fig. 9 As shown, the arm positioning seat 24 of the positioning connection structure 3 of the frame is located at the two ends of the connection cavity 200 at the lower part of the side beam 1 and the end of the cross beam 2, and is connected to the connection part 100 at the end of the cross beam 2 by bolts, covering the connection cavity 200, so that the bogie frame has the function of positioning the guide wheel pair. At the same time, after the arm positioning seat 24 is connected to the connection part 100 at the end of the cross beam 2, the connection cavity is covered, and a box-type structure is also formed, which makes the structure stable and ensures the structural strength.

[0058] See also Fig.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 a positioning round pin 28 is connected between the lower positioning plate 23 and the rotating arm positioning seat 24 and the connecting part 100 .

[0060] In the specific embodiment, see Fig.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 provided with positioning steps 27 in the horizontal direction, and a positioning round pin 28 is also installed when connected with the connecting portion 100 at the end of the beam 2, so that the box-type structure formed after the connection portion 100 at the end of the beam 2 is installed is firmly positioned in the horizontal direction, so that the connection structure between the beam 2 and the side beam 1 is stable, and the structural strength is guaranteed.

[0061] The elastic frame disclosed in the present invention is made of a composite material with sufficient strength, elasticity and vibration reduction properties instead of steel. The elasticity and vibration reduction properties of the composite material are utilized so that the frame as a whole has not only load-bearing capacity but also elasticity and vibration reduction functions. The integrated casting of the crossbeam adopts a casting process to cast the parts in one step, and then completes the overall preparation of the structure after a small amount of machining. Compared with the split structure, it avoids the shortcomings of long process cycle, multiple processes and large welding deformation caused by welding, and has the advantages of stable structure, short process, high production efficiency and low cost.

[0062] The invention discloses a bogie, which includes the elastic frame mentioned above and has the same beneficial effects as the elastic frame, which will not be described in detail here.

[0063] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that 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 a composite material, characterized in that: include: A crossbeam (2), and side beams (1) arranged at both ends of the crossbeam (2); as well as A positioning connection structure (3), formed at the end of the cross beam (2) and used for detachably fixing and connecting the side beam (1); The positioning connection structure (3) comprises a connection part (100) which is configured to match the curved shape of the longitudinal axis of the side beam (1) and is capable of suspending the two ends of the side beam (1) outside the cross beam (2); the connection part (100) has a connection cavity (200) which is used to conformally cover the outside of the side beam (1) and fix the side beam (1) so that the side beam (1) can elastically and vibration-absorbingly support the vehicle body.

2. The elastic frame according to claim 1, characterized in that; The side beam (1) is structured to be concave in the middle along the length direction; the middle of the side beam (1) is positioned and connected to the connecting portion (100) via an installation positioning structure; and an opening is formed at the lower portion of the connecting cavity (200) of the connecting portion (100).

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), and 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), and the mounting surface (20) has a mounting positioning hole (21) that cooperates with the boss of the mounting positioning structure.

4. The elastic frame according to claim 3, characterized in that ； The positioning structure comprises an upper clamping plate (4) and a lower clamping plate (5) which are 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) both have the boss.

5. The elastic frame according to claim 3, characterized in that ； The connection structure (3) further comprises a rotating arm positioning seat (24) for sealing the opening of the connection 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) along the length direction which can extend into the connecting cavity (200), and a positioning round pin (28) is connected between the lower positioning plate (23) and the rotating arm positioning seat (24) and the connecting portion (100).

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

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

9. The elastic frame according to any one of claims 1 to 7, It is characterized by: The side beam (1) is made of a non-metal composite material, and the cross beam (2) is made of an aluminum alloy material or an aluminum-based composite material.

10. A bogie, characterized in that: It comprises the elastic frame as described in any one of claims 1 to 9 above.

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