Lightweight bogie frame, bogie, and rail vehicle

Abstract

Provided are a lightweight bogie frame, a bogie, and a rail vehicle. The lightweight bogie frame comprises a cross beam assembly (2) and two side beam assemblies (1); each side beam assembly (1) comprises two guide frame supporting bodies (11) and one side bearing supporting body (12), and the guide frame supporting bodies (11) are arranged at the two ends of the side beam assembly (1), and by means of riveting, are connected to the side bearing supporting body (12) located at the middle position; the two side beam assemblies (1) are connected to the two sides of the cross beam assembly (2) so as to be connected to form an H-shaped structure; and the cross beam assembly (2) and the side beam assembly (1) share the side bearing supporting body (12) and are connected by means of riveting. When the bogie frame is assembled, the side bearing supporting body (12) may be first assembled on the guide frame supporting bodies (11) so as to be connected to a center plate supporting body of the cross beam assembly (2), or first assembled on the center plate supporting body and then connected to the guide frame supporting bodies (11).

Description

Lightweight bogie frame, bogie, and rail vehicle

[0001] The present invention claims priority to the Chinese patent application filed with the Patent Office of China on August 29, 2023, with application number 202311099361.1 and invention name “A lightweight bogie frame, bogie and rail vehicle”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present invention relates to a railway freight car bogie frame, in particular to a European standard endless beam lightweight railway freight car bogie frame, a bogie and a rail vehicle. Background Art

[0003] Railway freight cars generally require a high deadweight. A lower deadweight for the same axle load allows for a higher payload, improving operational efficiency. The Y25 series bogies utilize common components, such as wheelsets, axleboxes, suspension systems, and braking systems. This makes weight reduction challenging in bogie design. Welded frames are typically complex, requiring extensive welding work and high labor costs. This can also lead to weld defects that can compromise overall strength. To minimize bogie deadweight, improve assembly efficiency, and enhance reliability, structural innovations to the welded frame are necessary.

[0004] Patent CN 201810751211.7 discloses a rail transit vehicle and its modular bogie. The bogie frame adopts a modular design and includes side beams located on both sides and a cross beam detachably connected to the middle of the side beams on both sides. The cross section of the cross beam is specifically in the shape of an inverted trapezoid, with its opening facing upward. Connecting plates are provided at both ends of the cross beam, and the bottom surface of the connecting plate is detachably connected to the side surface of the corresponding side beam. However, this patent only changes the connection between the side beam component and the cross beam component from a welded structure to a riveted structure, without fundamentally changing the connection position. The stress concentration phenomenon at the connection part still exists. The side beam component and the cross beam component are an integrated structure, and the degree of modularization is not high, which is basically the same as the traditional welded integrated structure. The design of end beams at both ends of the frame increases the weight of the frame. Secondly, the production deformation of the long and large side beams is the largest at the ends, which increases the difficulty of assembling the end beams.

[0005] Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the defects of the welded frame such as high dead weight, large welding workload, low assembly efficiency and reliability, and high manufacturing cost. On the premise of ensuring the consistency of the interface size of the bogie frame, a lightweight bogie frame with a reasonable structure, high reliability and good assembly process is proposed.

[0007] In order to solve this technical problem, the technical solution adopted in the present invention is as follows:

[0008] In the first aspect, the present invention provides a lightweight bogie frame, comprising a crossbeam assembly and two side beam assemblies; each side beam assembly comprises two guide frame support bodies and a side bearing support body, the guide frame support bodies are arranged at both ends of the side beam assembly, and are connected to the first end and the second end of the side bearing support body located in the middle position by riveting; the crossbeam assembly and the side beam assembly share the side bearing support body, the crossbeam assembly comprises a center plate support body, the two ends of the center plate support body are respectively connected to the third ends of the side bearing support bodies of the two side beam assemblies, and the crossbeam assembly and the side beam assembly are connected to form an H-shaped structure; that is, the crossbeam assembly and the side beam assembly of the present invention share the side bearing support body and are connected by riveting; when the bogie frame is assembled, the side bearing support body can be first assembled on the guide frame support body and connected to the center plate support body of the crossbeam assembly, or first assembled on the center plate support body and then connected to the guide frame support body.

[0009] As a further technical solution, the side beam assembly includes two guide frame support bodies and a side bearing support body. The guide frame support bodies are arranged at both ends of the side beam assembly and are connected to the side bearing support bodies by riveting.

[0010] As a further technical solution, the guide frame support body is a monolithic cast aluminum structure, with the guide frame structure cast underneath and connected to the bogie suspension. One end of the guide frame support body is machined into a vertical surface after casting. This vertical surface is provided with a plurality of through-holes and connected to the side bearing support body via rivets.

[0011] As a further technical solution, the side bearing support body is an integral cast aluminum structure with three through holes set at the upper end; the first end, second end and third end of the side bearing support body are machined into vertical surfaces after casting, and through holes are set on the vertical surfaces; the through holes at the first end and the second end are connected to the guide frame support body by rivets; the through hole at the third end is connected to the core plate support body by rivets.

[0012] As a further technical solution, the end face shape of the third end of the side bearing support body is an inverted trapezoid.

[0013] As a further technical solution, the core plate support body is an integral cast aluminum structure with a core plate structure cast on the upper part. The two ends of the core plate support body are machined into vertical surfaces after casting. The same number of through holes as the side support body on one side are set on the vertical surface, and the side support bodies on both sides are connected by rivets.

[0014] As a further technical solution, the vertical plane connecting the core plate support body and the two side support bodies is an inverted trapezoid.

[0015] In a second aspect, the present invention discloses a bogie comprising a lightweight bogie frame as described in detail.

[0016] As a further technical solution, the bottom of the guide frame support body is connected to the bogie suspension device; the center plate support body cooperates with the upper center plate of the car body; and the side bearing support body is connected to the bogie side bearing.

[0017] In a third aspect, the present invention discloses a rail vehicle comprising the bogie described above.

[0018] Beneficial effects of the present invention:

[0019] A lightweight bogie frame provided by the present invention includes a crossbeam assembly and two side beam assemblies; each crossbeam assembly includes two guide frame support bodies and a side bearing support body, the guide frame support bodies are arranged at both ends of the side beam assembly, and are connected to the side bearing support body located in the middle position by riveting; the two side beam assemblies are connected at both sides of the crossbeam assembly to form an H-shaped structure, the crossbeam assembly and the side beam assembly share the side bearing support body, and are connected by riveting, thereby changing the connection position and method of the side beams and crossbeams of the traditional welded frame, and avoiding stress concentration at the connection part between the side beams and the crossbeams; one crossbeam assembly and two side beam assemblies are composed of three load-bearing modules, realizing modular design of the frame, and improving product quality, reliability and maintainability.

[0020] Furthermore, the above-mentioned components adopt a cast aluminum structure, which can greatly reduce the frame weight while ensuring structural strength, thereby improving vehicle operation efficiency; the support bodies are riveted structures, and the crossbeam composition and the side beam composition share a side bearing support body, and are connected by riveting; when the bogie frame is assembled, the side bearing support body can be first assembled on the guide frame support body and connected to the center plate support body of the crossbeam composition, or first assembled on the center plate support body and then connected to the guide frame support body; thereby improving the assembly efficiency of the bogie frame and reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] FIG1 is a schematic structural diagram of the present invention;

[0023] FIG2 is a schematic diagram of the side beam composition of the present invention;

[0024] FIG3 is a schematic diagram of the crossbeam composition of the present invention;

[0025] FIG4 is a schematic diagram of a guide frame support body according to the present invention;

[0026] FIG5 is a schematic diagram of a side bearing support body of the present invention;

[0027] FIG6 is a schematic diagram of a core plate support body of the present invention;

[0028] In the figure: 1 side beam composition, 2 cross beam composition, 11 guide frame support body, 11-1 guide frame structure, 11-2 through hole, 12 side bearing support body, 12-1 through hole, 12-2 through hole, 12-3 through hole, 21 center plate support body; 21-1 center plate structure, 21-2 through hole. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[0031] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0032] As shown in Figure 1, this embodiment discloses a lightweight bogie frame, which mainly includes a crossbeam assembly 2 and a side beam assembly 1; the two side beam assemblies 1 are arranged on both sides of the frame and are connected to form an H-shaped structure through an intermediate crossbeam assembly 2. The crossbeam assembly 2 and the side beam assembly 1 share a side bearing support body 12 and are connected by riveting. When the bogie frame is assembled, the side bearing support body 12 can be first assembled on the guide frame support body 11 and then connected to the center plate support body 21 of the crossbeam assembly 2, or first assembled on the center plate support body 21 and then connected to the guide frame support body 11.

[0033] As shown in Figure 2, the side beam assembly 1 in this embodiment includes two guide frame support bodies 11 and a side bearing support body 12. The guide frame support bodies 11 are arranged at both ends of the side beam assembly 1. The guide frame support body 11 is connected to the first end and the second end of the side bearing support body 12 by riveting. The first end and the second end are oppositely arranged, and the plane where the first end is located is parallel to the plane where the second end is located.

[0034] As shown in Figure 3, the crossbeam assembly 2 in this embodiment includes the above-mentioned two side bearing supports 12 and a center plate support 21. The side bearing supports 12 are arranged at both ends of the crossbeam assembly 2. The third ends of the two side bearing supports 12 are connected to the middle center plate support 21 by riveting. The plane where the third end is located is perpendicular to the plane where the first end is located and perpendicular to the plane where the second end is located.

[0035] As shown in Figure 4 , the pedestal support body 11 in this embodiment is a monolithic cast aluminum structure. Its upper portion features an I-shaped structure with a variable cross-section, increasing the height of the connection surface and ensuring the strength of the connection between modules. The lower portion is cast with a pedestal structure 11-1, which connects to the bogie suspension. One end of the pedestal support body 11 (on the right side of Figure 4 ) is machined into a vertical surface after casting. This vertical surface is provided with a plurality of through-holes 11-2, which enable rivet connection to the side bearing support body 12.

[0036] As shown in Figure 5, the side bearing support 12 is a monolithic cast aluminum structure, a common structure for the side sill assembly 1 and the cross beam assembly 2. It transmits the vertical load of the car body from the center plate and side bearings to the guide frame support 11 at the four ends of the frame assembly through the side bearing support 12, solving the stress concentration problem at the connection between the side sill assembly and the cross beam assembly in traditional welded frames. Three through holes 12-3 are provided at its upper end for connection to the bogie side bearing assembly. The two ends of the side bearing support 12 are cast and machined into vertical surfaces. The vertical surfaces are provided with the same number of through holes 12-1 as the guide frame support 11. Through holes 12-1 are connected to the guide frame support 11 via rivets. One side of the side bearing support 12 is cast and machined into a vertical surface. Several through holes 12-2 are provided on the vertical surface. Through holes 12-2 are connected to the center plate support 21 via rivets. The specific structure of the side bearing support 12 is described below:

[0037] As shown in FIG5 , in this embodiment, the side bearing support body 12 includes a main body, which is in the shape of an I-beam. The third end face of the I-beam body is an inverted trapezoidal surface, which is connected to the center plate support body 21. The purpose of being designed as an inverted trapezoidal shape is that the upper plane serves as a load-bearing surface, and the vertical load of the vehicle body is transferred to the side bearing support body through the side bearing. To ensure structural strength, the width of the upper plane must be greater than that of the lower plane, hence the inverted trapezoidal shape. ; The relative rear end face is an irregular surface, the top surface of the rear end face is higher than the top surface of the I-shaped body, a top rectangular surface is set on the top of the rear end face, and side rectangular surfaces are also set on both sides of the rear end face, the top rectangular surface and the top surface of the I-shaped body are connected by reinforcing ribs, and the fixed rectangular surface is parallel to the top of the guide frame support body 11, and the side rectangular surface is flush with and connected to the end surface of the guide frame support body 11; from the force perspective, the side bearing support body must transfer the hammer load of the entire car body to the guide frame support body, so the surface area connected to the guide frame support body must be large, and the rear end face connects the guide frame support body 11 connecting surfaces on both sides into a whole, and the structural strength requirement is high.

[0038] Furthermore, a through hole 12 - 3 is provided on the top surface of the I-shaped body; a through hole 12 - 1 is provided on one of the side rectangular surfaces, and a through hole 12 - 2 is provided on the other side rectangular surface.

[0039] Furthermore, in order to ensure the connection strength and rationality of the force, the length of the side support body 12 is about 1 / 3 of the total length of the crossbeam; the length of the side support body 12 is about 1 / 3 of the length of the side beam.

[0040] As shown in Figure 6, the center disc support body 21 is a monolithic cast aluminum structure with an I-shaped cross-section. Two reinforcing ribs are positioned on each side to support the vertical load of the center disc. A center disc structure 21-1 is cast on the upper portion, mating with the upper center disc of the vehicle body. The ends of the center disc support body 21 are machined into vertical surfaces after casting. These surfaces are provided with the same number of through-holes 21-2 as on one side of the side bearing supports 12. These through-holes 21-2 are connected to the side bearing supports 12 via rivets. Specifically, the vertical surfaces are in the shape of an inverted trapezoid. The center disc support body transfers the center disc load of the vehicle body to the side bearing supports. The upper surface, acting as a load-bearing surface, requires strength, and is therefore wider than the lower surface.

[0041] This embodiment also provides a bogie, including the lightweight bogie frame described above; the bottom of the guide frame support body is connected to the bogie suspension device; the center plate support body is matched with the upper center plate of the car body; and the side bearing support body is connected to the bogie side bearing.

[0042] This embodiment also provides a rail vehicle, comprising the bogie described above. Because the rail vehicle is provided with the bogie described above, the rail vehicle also possesses all of the advantages described above. In some embodiments, the rail vehicle provided by the present invention can be any appropriate type of vehicle, such as a conventional train, a motor vehicle, a subway vehicle, or an urban rail vehicle. The present invention is not limited to any specific type of rail vehicle.

[0043] Finally, it should be noted that relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0044] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A lightweight bogie frame, comprising a cross beam and two side beams; characterized in that: Each side beam assembly includes two guide frame support bodies and a side bearing support body, the guide frame support bodies are arranged at the two ends of the side beam assembly, and are connected to the first end and the second end of the side bearing support body located in the middle position by riveting; the cross beam assembly and the side beam assembly share the side bearing support body, the cross beam assembly includes a center plate support body, the two ends of the center plate support body are respectively connected to the third ends of the side bearing support bodies of the two side beam assemblies, and the cross beam assembly and the side beam assembly are connected to form an H-shaped structure.

2. The lightweight bogie frame according to claim 1, characterized in that: The guide frame support body is an integral cast aluminum structure with a guide frame structure cast at the bottom. One end of the guide frame support body is machined into a vertical surface after casting. A plurality of through holes are arranged on the vertical surface and connected to the side bearing support body by rivets.

3. The lightweight bogie frame according to claim 2, characterized in that: The guide frame structure on the guide frame support body with two side beams in relative positions is coaxially arranged.

4. The lightweight bogie frame according to claim 1, characterized in that: The side bearing support body is an integral cast aluminum structure with three through holes arranged at the upper end; the first end, the second end and the third end of the side bearing support body are machined into a vertical plane after casting, and through holes are arranged on the vertical plane; the through holes at the first end and the second end are connected to the guide frame support body by rivets; the through hole at the third end is connected to the core plate support body by rivets.

5. The lightweight bogie frame according to claim 4, characterized in that: The end surface shape of the third end of the side bearing support body is an inverted trapezoid.

6. The lightweight bogie frame according to claim 1, characterized in that: The core plate support body is an integral cast aluminum structure with a core plate structure cast on the upper part. Both ends of the core plate support body are machined into vertical planes after casting. The vertical planes are provided with the same number of through holes as on one side of the side bearing support body, and are connected to the side bearing support bodies on both sides by rivets.

7. The lightweight bogie frame according to claim 6, characterized in that: The vertical plane connecting the core plate support body and the two side bearing support bodies is in an inverted trapezoidal shape.

8. A bogie, characterized in that: Comprising the lightweight bogie frame described in any one of claims 1-7.

9. The bogie according to claim 8, characterized in that The bottom of the guide frame support body is connected to the bogie suspension device; the center plate support body cooperates with the upper center plate of the car body; and the side bearing support body is connected to the bogie side bearing.

10. A rail vehicle, characterized in that: Comprising the bogie described in any one of claims 8-9.

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