Bogie lightweight framework design method and framework

Abstract

According to the bogie lightweight framework design method and the framework, layout is carried out according to transverse loads and longitudinal loads borne by the bogie framework, the transverse loads and the longitudinal loads are both in the horizontal direction, and the vertical height positions of the transverse loads and the longitudinal loads are both axle centers; according to the method, mounting bases for bearing longitudinal loads and mounting bases for bearing transverse loads on the framework are placed on the same bearing plane, virtual quadrilateral construction lines are constructed on the bearing plane, and positioning points for bearing rhombic loads are established at the intersection points of the virtual quadrilateral construction lines. The stress of the framework main body is effectively simplified, and the lightweight design difficulty of the framework main body is reduced, so that the purpose of overall weight reduction of the bogie framework is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit vehicle bogies, and in particular to a method and a structure for a lightweight bogie 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, and the frame is the basic load-bearing structure located between the primary and secondary suspension devices of the bogie.

[0003] The main structure of the frame is generally composed of side beams, cross beams and various mounting seats connected thereto. At present, the main structure of the existing rail train bogie frame generally adopts welding or casting technology to connect various components into a whole to jointly bear all loads. The overall frame bears many types of loads with different action points and directions. The load streamlines are superimposed on each other, and the distribution in three-dimensional space is extremely complex, which has caused great obstacles to the lightweight design of the frame;

[0004] Bogies are an important component of rail transportation equipment. Their technical development directions and trends include high-speed passenger transportation and lightweight structure. Weight reduction is an important part. Existing rail train bogie frames generally adopt an integral structure, and the structure has also been optimized. The space for further weight reduction is limited and difficult. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a method and a frame for lightweighting a bogie, so as to obtain a larger weight reduction space for the frame body and reduce the difficulty of lightweighting the frame.

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

[0007] The invention discloses a method for designing a lightweight bogie frame, wherein:

[0008] The layout is carried out according to the lateral load and longitudinal load borne by the bogie frame, wherein both the lateral and longitudinal loads are in horizontal directions, and since the vertical height positions of the lateral and longitudinal loads are both the centers of the axles, the mounting seats on the frame that bear the longitudinal load and the lateral load are placed on the same load-bearing plane, and a virtual quadrilateral construction line is constructed on the load-bearing plane, and diamond load positioning points are established at the intersections of the virtual quadrilateral construction lines.

[0009] Furthermore, the bearing plane is elastically connected to the frame in a removable manner.

[0010] The framework of the present invention for implementing the above-mentioned bogie lightweight frame design method comprises:

[0011] The main structure;

[0012] A horizontal bearing plate disposed at the lower part of the frame body, the horizontal bearing plate forming the bearing plane;

[0013] A through hole is provided in the middle of the horizontal bearing plate;

[0014] The through hole is symmetrically provided with transverse stoppers for bearing transverse loads on both sides of the longitudinal center axis a of the frame body, and the center of the transverse stoppers coincides with the transverse center axis b;

[0015] The through hole is provided with a traction rod seat for bearing the longitudinal load at the side of the transverse central axis b, and the center of the traction rod seat coincides with the longitudinal central axis a;

[0016] Among them, a virtual quadrilateral construction line X is formed on the horizontal bearing plate, and the intersection of two adjacent sides of the virtual quadrilateral construction line X forms the positioning point. The horizontal bearing plate forms a positioning seat at the positioning point position, so that the lateral load, the longitudinal load and the diamond load formed by the four positioning points are in the same plane and act on the horizontal bearing plate, and the horizontal bearing plate is elastically connected to the frame body.

[0017] Furthermore, the horizontal bearing plate is installed in the middle of the frame body, and mounting holes are opened on both sides of the horizontal bearing plate, and the mounting holes are elastically connected to the frame body through rubber nodes.

[0018] Furthermore, the horizontal supporting plate is a quadrilateral plate-shaped body, and two ends of the horizontal supporting plate form a concave arc structure.

[0019] Furthermore, the horizontal bearing plate is made of low-density and high-strength metal material.

[0020] In the above technical solution, the present invention provides a bogie lightweight frame involving a method and a frame, with the following beneficial effects:

[0021] The invention sets a horizontal bearing plate at the lower part of the frame body, sets a traction rod seat, a transverse stop seat and a positioning seat on the bearing plate, so that the transverse load, the longitudinal load and the diamond load are in the same plane and act on the horizontal bearing plate, and then the horizontal bearing plate is elastically connected to the frame body;

[0022] Since the horizontal load-bearing plate shares the lateral load, longitudinal load and diamond load, the complex load of the frame can be decomposed, the load streamline is simpler and smoother, and the additional bending moment caused by the distortion of the load streamline is minimized, so that the force on the frame body is smaller and simpler. The positioning seats, traction rod seats and lateral stop seats are reduced on the frame, making the frame body structure simpler and smoother. Therefore, the frame body has a larger weight reduction space, and the overall weight reduction of the bogie frame is achieved by lightweight design of the frame body.

[0023] In addition, it can not only greatly reduce the weight of the frame, but also has strong scalability. When the horizontal load-bearing plate remains unchanged, different matching interfaces can be designed according to the actual needs of the project to lightweight the main frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 It is an axonometric diagram of the lightweight frame of the bogie disclosed in the present invention;

[0026] Figure 2 It is a schematic diagram of the horizontal load-bearing plate structure and load-bearing of the lightweight frame of the bogie disclosed in the present invention;

[0027] Figure 3 The invention discloses a schematic diagram of the connection between a horizontal load-bearing plate and a frame body of a lightweight bogie frame.

[0028] Description of reference numerals:

[0029] 1. Horizontal bearing plate; 2. Frame body; 3. Traction rod seat; 4. Horizontal stop seat; 5. Positioning seat; 6. Elastic node; 7. Mounting hole; 8. Bolt. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1 , 2 As shown;

[0032] A method for designing a lightweight bogie frame is invented. The method:

[0033] The layout is carried out according to the lateral load and longitudinal load borne by the bogie frame, wherein both the lateral and longitudinal loads are in horizontal directions, and since the vertical height positions of the lateral and longitudinal loads are both the centers of the axles, the mounting seats on the frame that bear the longitudinal load and the lateral load are placed on the same load-bearing plane, and a virtual quadrilateral construction line is constructed on the load-bearing plane, and diamond load positioning points are established at the intersections of the virtual quadrilateral construction lines.

[0034] Preferably, the bearing surface is resiliently connected to the frame in a removable manner.

[0035] Specifically, according to the method, the main loads borne by the bogie frame are vertical load, transverse load and longitudinal load, among which the transverse and longitudinal loads are both in the horizontal direction, and the optimal vertical height position of both is the axle center. Therefore, the mounting seats that bear the longitudinal load and transverse load, such as the traction rod seat, transverse block and positioning seat on the frame, are placed on the same plane, which can effectively simplify the load streamline of the bogie, thereby simplifying the force of the frame body.

[0036] A lightweight bogie frame is invented, comprising: a flat load-bearing plate 1, a frame body 2;

[0037] A horizontal bearing plate 1 is arranged at the lower part of the frame body 2, and a bearing plane is formed by the horizontal bearing plate 1. A through hole is opened in the middle of the horizontal bearing plate 1. Transverse stoppers 4 for bearing transverse loads are symmetrically arranged on both sides of the longitudinal center axis a of the frame body 2 through the through hole, and the center of the transverse stopper 4 coincides with the transverse center axis b. A traction rod seat 3 for bearing longitudinal loads is arranged on the side of the transverse center axis b through the through hole, and the center of the traction rod seat 3 coincides with the longitudinal center axis a. Since the traction rod seat 3 of the longitudinal load mainly bears the longitudinal load along the length direction of the vehicle body and is not affected by the symmetrical force, the traction rod seat 3 of the longitudinal load can be one or two. When there are two traction rod seats 3 of the longitudinal load, the traction rod seats 3 of the longitudinal load are symmetrically arranged on both sides of the transverse center axis b. The embodiment of the present invention only takes a traction rod seat 3 of a longitudinal load arranged on one side of the transverse center axis b as an example;

[0038] Among them, a virtual quadrilateral construction line X is formed on the horizontal bearing plate 1, and the intersection of two adjacent sides of the virtual quadrilateral construction line X forms a positioning point. The horizontal bearing plate 1 forms a positioning seat 5 at the position of the positioning point, so that the lateral load, the longitudinal load and the diamond load formed by the four positioning points are in the same plane and act on the horizontal bearing plate 1 (such as Figure 2 As shown), and the horizontal bearing plate 1 is elastically connected to the frame body 2;

[0039] In this structure, a horizontal bearing plate 1 is arranged at the lower part of the frame body 2, and a bearing plane is formed by the horizontal bearing plate 1 to bear the lateral load and longitudinal load of the bogie frame. The traction rod seat 3, the transverse block seat 4 and the positioning seat 5 are placed on the same plane, and the main horizontal load is shared by the horizontal bearing plate, which effectively simplifies the force of the frame body. The horizontal bearing plate 1 is installed on the lower surface of the frame body 2, and the horizontal bearing plate 1 shares the lateral load, longitudinal load and diamond load, so that the force of the frame body 2 is smaller and simpler, and the positioning seat 5, the traction rod seat 3 and the transverse block seat 4 are reduced on the frame, so that the frame body structure is simpler and smoother, so that the frame body obtains a larger weight reduction space, and the overall weight reduction of the bogie frame is achieved by lightweight design of the frame body.

[0040] See also Figure 1 , 3 As shown:

[0041] Preferably, the horizontal bearing plate 1 is installed in the middle of the frame body 2, and mounting holes 7 are opened on both sides of the horizontal bearing plate 1. Figure 3 As shown, the mounting hole 7 is elastically connected to the frame body 2 through a rubber node 6. The rubber node 6 is a prior art, which includes a rubber sleeve, a bolt 8, a nut, and a gasket. Rubber sleeves are installed at both ends of the mounting hole 7. The bolt 8 passes through the side beam of the frame body 2 and the mounting hole 7 of the horizontal bearing plate 1 and cooperates with the nut gasket to elastically fix the horizontal bearing plate 1 in the middle of the frame body 2.

[0042] See also Figure 2 As shown:

[0043] Preferably, the horizontal bearing plate 1 is a quadrilateral structure, and a concave arc structure is formed at both ends, which is conducive to reducing the weight of the horizontal bearing plate 1. The horizontal bearing plate 1 is a low-density and high-strength metal material, specifically, a forged horizontal bearing plate made of a low-density and high-strength aluminum-based composite material, which can further lighten the horizontal bearing plate:

[0044] 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. A method for designing a lightweight bogie frame, characterized in that: The method: The layout is carried out according to the lateral load and longitudinal load borne by the bogie frame, wherein both the lateral and longitudinal loads are in horizontal directions, and since the vertical height positions of the lateral and longitudinal loads are both the centers of the axles, the mounting seats on the frame that bear the longitudinal load and the lateral load are placed on the same load-bearing plane, and a virtual quadrilateral construction line is constructed on the load-bearing plane, and diamond load positioning points are established at the intersections of the virtual quadrilateral construction lines.

2. The method for designing a lightweight bogie frame according to claim 1, comprising: The bearing surface is resiliently connected to the frame in a removable manner.

3. A framework for implementing the lightweight frame design method of a bogie according to claim 1, comprising: The frame body (2) is characterized in that: it also includes A horizontal bearing plate (1) arranged at the lower part of the frame body (2), wherein the horizontal bearing plate (1) forms the bearing plane; A through hole is provided in the middle of the horizontal bearing plate (1); The through hole is symmetrically provided with transverse stops (4) for bearing transverse loads on both sides of the longitudinal center axis a of the frame body (2), and the center of the transverse stops (4) coincides with the transverse center axis b; The through hole is provided with a traction rod seat (3) for bearing the longitudinal load on the side of the transverse central axis b, and the center of the traction rod seat (3) coincides with the longitudinal central axis a; A virtual quadrilateral construction line X is formed on the horizontal bearing plate (1), and the intersection of two adjacent sides of the virtual quadrilateral construction line X forms the positioning point. The horizontal bearing plate (1) forms a positioning seat (5) at the positioning point, so that the transverse load, the longitudinal load and the diamond load formed by the four positioning points are in the same plane and act on the horizontal bearing plate (1), and the horizontal bearing plate (1) is elastically connected to the frame body (2).

4. The framework of the method for designing a lightweight bogie framework according to claim 3, It is characterized by: The horizontal bearing plate (1) is installed in the middle of the frame body (2), and mounting holes (7) are provided on both sides of the horizontal bearing plate (1), and the mounting holes (7) are elastically connected to the frame body (2) through rubber nodes (6).

5. The framework of the bogie lightweight frame design method according to claim 3 or 4, characterized in that ； The horizontal supporting plate (1) is a quadrilateral plate-shaped body, and two ends of the horizontal supporting plate (1) form a concave arc structure.

6. The framework of the bogie lightweight frame design method according to claim 3 is characterized in that ； The horizontal bearing plate (1) is made of a low-density and high-strength metal material.

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