Bogie and railway vehicle

Abstract

The application discloses a bogie and a railway vehicle, the bogie comprises a frame, the frame comprises a frame body and a mounting seat, the frame body is a composite material frame body, part of the mounting seat is a composite material mounting seat, and part of the mounting seat is a metal material mounting seat. The composite material frame body and the composite material mounting seat are connected through a threaded fastener, are conductive at a threaded fastener mounting position. The composite material frame body and the metal material mounting seat are connected through a threaded fastener, are riveted through a rivet, and are connected through structural glue, are insulated at a threaded fastener mounting position, and are conductive at a rivet mounting position. The bogie provided by the application has the advantages of light weight, high strength, stable and reliable conduction and the like.

Description

Technical Field

[0001] This application relates to the field of rail vehicle technology, and in particular to rail vehicle bogies. Background Technology

[0002] The bogie accounts for more than 40% of the overall weight of a rail vehicle, so reducing the weight of the bogie is key to saving energy and reducing consumption in rail vehicles.

[0003] While reducing the weight of the bogie, it is also necessary to consider the bogie's strength performance, electrical conductivity, and other properties. How to balance these properties while reducing weight is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application provides a bogie, including a frame, the frame including a frame body and a mounting base, the frame body being a composite material frame body, some of the mounting bases being composite material mounting bases and some of the mounting bases being metal material mounting bases, the composite material frame body and the composite material mounting bases being connected by threaded fasteners, the composite material frame body and the metal material mounting bases being connected by threaded fasteners and riveted by riveting pieces and bonded by structural adhesive.

[0005] In one embodiment, the annular gap between the outer peripheral surface of the rivet and the rivet hole is filled with a conductive medium.

[0006] In one embodiment, for a plurality of rivets connected to the same metal mounting base, a conductive medium is filled in the annular gap between the outer peripheral surface of some or all of the rivets and the rivet hole.

[0007] In one embodiment, structural adhesive is applied at least between the riveting mounting surfaces of the composite material frame body and the metal material mounting base, and the two ends of the riveting are in close contact with the riveted parts, so that the annular gap becomes a closed space.

[0008] In one embodiment, the axes of the rivet and the threaded fastener connected to the same metal mounting base are at an angle of 45° to 90°.

[0009] In one embodiment, the threaded fastener mounting structure of the composite material frame body and the composite material mounting base is as follows: metal inserts are embedded in both the composite material frame body and the composite material mounting base, and the threaded fasteners are connected to two metal inserts, with the potential difference between the metal inserts and the threaded fasteners being less than a preset value.

[0010] In one embodiment, the threaded fastener mounting structure of the composite material frame body and the metal material mounting base is as follows: a metal connector is connected to the composite material frame body, the threaded fastener is connected to the metal connector, and an insulating layer is provided between the metal connector and the composite material frame body.

[0011] In one embodiment, the metal connector includes a large-diameter portion and a small-diameter portion. The small-diameter portion is connected to a hole in the main body of the composite material frame. The large-diameter portion is provided with an anti-rotation groove, and a nut that mates with a threaded fastener is locked in the anti-rotation groove.

[0012] In one embodiment, a metal busbar is provided on the main body of the composite material frame, and all conductive parts of the frame are connected to the metal busbar.

[0013] In addition, this application also provides a rail vehicle including a bogie, wherein the bogie is a bogie as described in any of the above claims.

[0014] The bogie provided in this application has advantages such as light weight, high strength, and stable and reliable electrical conductivity. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of the bogie for the rail vehicle provided in this application;

[0016] Figure 2 A schematic diagram of the connection structure between the main body of the composite material frame and a metal mounting base;

[0017] Figure 3 This is a cross-sectional view of the riveted parts installation area;

[0018] Figure 4 A cross-sectional view of the threaded fastener mounting area on the composite material frame body and the composite material mounting base;

[0019] Figure 5 This is a cross-sectional view of the threaded fastener mounting area on the composite material frame body and the metal material mounting base.

[0020] The annotations in the attached figures are explained as follows:

[0021] 1. Frame main body, 2. Mounting base, 2a. Composite material mounting base, 2b. Metal material mounting base, 3. Metal junction point, 4. Riveting parts, 5. Threaded fasteners, 6. Conductive medium, 7. Anti-loosening gasket, 8. Metal insert, 9. Metal connector, 9a. Large diameter part, 9b. Small diameter part, 9c. Anti-rotation slot, 10. Nut, 11. Structural adhesive, 12. Insulation layer. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, the bogie frame includes a frame body 1 and multiple mounting seats 2 connected to the frame body 1.

[0024] The main frame 1 is mainly composed of crossbeams and side beams. In the illustrated embodiment, the main frame 1 is mainly composed of one crossbeam and two side beams, forming an "H" shaped structure.

[0025] Mounting bracket 2 is used to provide a mounting base for other bogie components, generally including brake hanger bracket, anti-roll torsion bar bracket, positioning swing arm bracket, current collector bracket, fuse box bracket, lateral stop bracket, lateral shock absorber bracket, traction rod bracket, etc.

[0026] The main frame 1 is made of composite materials, some mounting bases 2 are made of composite materials, and some mounting bases 2 are made of metal. This combination of materials can effectively reduce the weight of the frame while maintaining its strength performance. Specifically, the composite materials can be carbon fiber reinforced composite materials, and the metal materials can be low-alloy steel, stainless steel, titanium alloy, etc.

[0027] One or more metal junction points 3 can be installed on the main body 1 of the composite material frame. Figure 1 In this structure, metal busbar 3 is located at the end of the side beam. Conductive components of the frame can discharge current at metal busbar 3, thus reliably discharging backflow current, static electricity, and other currents, ensuring safety during use. Specifically, each conductive component can utilize the conductivity of its own metal parts to discharge current to metal busbar 3, or it can discharge current to metal busbar 3 via external wires, copper strips, etc.

[0028] like Figure 2 As shown, the composite material frame body 1 and the metal material mounting base 2b are connected by threaded fasteners 5, riveted by riveting pieces 4, and bonded by structural adhesive 11. This combined connection method can ensure the connection strength of the two different material components.

[0029] like Figure 3 As shown, by properly matching the mating dimensions of the riveting part 4 and the riveting hole, an annular gap can be formed between the outer circumferential surface of the riveting part 4 and the riveting hole. This annular gap is filled with a conductive medium 6, which can be conductive grease, conductive paste, etc. For ease of explanation, this setting will be referred to as the conductive setting below.

[0030] When riveting holes are drilled on the composite material frame body 1, the carbon fiber bundles inside the composite material will be exposed. The carbon fiber has good electrical conductivity. After adopting the above-mentioned conductive setting, the carbon fiber will conduct electricity to the metal riveting part 4 through the conductive medium 6, and the metal riveting part 4 will further conduct the electricity to the metal material mounting base 2b, thereby achieving good electrical conductivity between the composite material frame body 1 and the metal material mounting base 2b.

[0031] Typically, the surface material of composite materials is resin, which results in poor electrical conductivity. Consequently, good electrical conduction cannot be achieved when connecting with metal components. However, the aforementioned conductive design effectively solves this problem, enabling equipotential grounding connection between composite material components and metal components.

[0032] If a single metal mounting base 2b is connected to multiple rivets 4 (for example) Figure 2 The metal mounting base 2b shown has four rivet parts 4 connected to it. The above-mentioned conductive setting can be implemented on only one or a few rivet parts 4, while the remaining rivet parts 4 adopt conventional settings. Of course, theoretically, the above-mentioned conductive setting can also be implemented on all rivet parts 4 connected to the same metal mounting base 2b.

[0033] like Figure 3 As shown, structural adhesive 11 is provided at least between the mounting surfaces of the riveting parts 4 of the composite material frame body 1 and the metal material mounting base 2b. Furthermore, both ends of the riveting parts 4 (ends A and B in the figure) are in close contact with the riveted parts. In this way, the annular gap between the riveting parts 4 and the riveting hole becomes a closed space. This can prevent the leakage of the conductive medium 6 filled inside and delay the oxidation failure of the conductive medium 6, thereby making the conductivity more stable. In addition, the structural adhesive 11 at this position can effectively limit the relative radial displacement between the riveting parts 4 and the riveting hole, keeping the annular gap filled with the conductive medium 6 stable, which helps to ensure the stability of the conductivity.

[0034] like Figure 2 As shown, it is preferable that the axes of the rivet 4 and the threaded fastener 5 connected to the same metal mounting base 2b are at an angle of 45° to 90°. That is, the rivet 4 and the threaded fastener 5 are respectively mounted on two mounting surfaces of the same metal mounting base 2b at an angle of 45° to 90° to each other. This can make full use of the axial tensile and compressive properties of the rivet 4, reduce the shear force it bears, and limit the relative displacement between the rivet 4 and the rivet hole, thereby further improving the conductivity stability.

[0035] like Figure 4As shown, the installation structure of the threaded fastener 5 between the composite material frame body 1 and the composite material mounting base 2a is as follows: metal inserts 8 are embedded in both the composite material frame body 1 and the composite material mounting base 2a, and the threaded fastener 5 is connected to the two metal inserts 8. The potential difference between the metal inserts 8 and the threaded fastener 5 is less than a preset value. Specifically, both the metal inserts 8 and the threaded fastener 5 can be made of high-potential metal materials, such as stainless steel or titanium alloy.

[0036] This mounting structure enables electrical conductivity between the composite material frame body 1 and the composite material mounting base 2a at the mounting location of the threaded fastener 5, increasing the overall electrical reliability of the frame.

[0037] like Figure 5 As shown, the installation structure of the threaded fastener 5 between the composite material frame body 1 and the metal material mounting base 2b is as follows: a metal connector 9 is connected to the composite material frame body 1, the threaded fastener 5 is connected to the metal connector 9, and an insulating layer 12 is provided between the metal connector 9 and the composite material frame body 1.

[0038] Specifically Figure 5 In this design, the threaded fastener 5 is a bolt. The metal connector 9 has a central through hole and, along its axial direction, a large-diameter portion 9a and a small-diameter portion 9b. The large-diameter portion 9a of the metal connector 9 has an anti-rotation groove 9c, in which the nut 10 is secured, preventing loosening. The small-diameter portion 9b of the metal connector 9 is connected to a hole in the composite material frame body 1, and an insulating layer 12 is disposed between the small-diameter portion 9b and the hole. The bolt passes sequentially through the hole on the metal material mounting base 2b, through the small-diameter portion 9b of the metal connector 9, and extends into the large-diameter portion 9a of the metal connector 9 to be fastened together with the nut 10. An anti-loosening washer 7 is provided between the bolt head and the metal material mounting base 2b. By selecting appropriate materials, the potential difference between the anti-loosening washer 7, bolt, nut 10, metal connector 9 and metal material mounting base 2b can be controlled to be less than the preset value. For example, if the metal material mounting base 2b is made of low alloy steel, the anti-loosening washer 7, bolt, nut 10 and metal connector 9 can also be made of low alloy steel.

[0039] This mounting structure insulates the interconnected composite material frame body 1 and the metal mounting base 2b at the mounting points of the threaded fasteners 5, thus preventing electrochemical corrosion between the two different material components due to large potential differences. Conductivity between the interconnected composite material frame body 1 and the metal mounting base 2b is achieved through the aforementioned conductive arrangement at the riveting points.

[0040] In the illustrated embodiment of this application, the composite material frame body 1 and the composite material mounting base 2a are connected by threaded fasteners 5, and the installation part of the threaded fasteners 5 is conductive. The composite material frame body 1 and the metal material mounting base 2b are connected by threaded fasteners 5 and riveted and glued, and the installation part of the threaded fasteners 5 is insulated, while the riveted part is conductive.

[0041] The above examples illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A bogie, comprising a frame, said frame including a frame body (1) and a mounting base (2), characterized in that, The main frame (1) is a composite material frame, and part of the mounting base (2) is a composite material mounting base (2a) and part of the mounting base (2) is a metal material mounting base (2b). The composite material frame (1) and the composite material mounting base (2a) are connected by threaded fasteners (5), and the composite material frame (1) and the metal material mounting base (2b) are connected by threaded fasteners (5), riveted by riveting pieces (4), and bonded by structural adhesive (11).

2. The bogie according to claim 1, characterized in that, The annular gap between the outer circumferential surface of the riveting part (4) and the riveting hole is filled with a conductive medium (6).

3. The bogie according to claim 2, characterized in that, For multiple rivets (4) connected to the same metal mounting base (2b), a conductive medium (6) is filled in the annular gap between the outer peripheral surface of some or all of the rivets (4) and the rivet hole.

4. The bogie according to claim 3, characterized in that, Structural adhesive (11) is provided at least between the mounting surfaces of the rivet (4) of the composite material frame body (1) and the metal material mounting base (2b), and the two ends of the rivet (4) are in close contact with the riveted part, so that the annular gap becomes a closed space.

5. The bogie according to claim 1, characterized in that, The axes of the rivet (4) and the threaded fastener (5) connected to the same metal mounting base (2b) are at an angle of 45° to 90°.

6. The bogie according to any one of claims 1-5, characterized in that, The installation structure of the threaded fastener (5) of the composite material frame body (1) and the composite material mounting base (2a) is as follows: metal inserts (8) are embedded on both the composite material frame body (1) and the composite material mounting base (2a), and the threaded fastener (5) is connected to the two metal inserts (8). The potential difference between the metal insert (8) and the threaded fastener (5) is less than the preset value.

7. The bogie according to any one of claims 1-5, characterized in that, The installation structure of the threaded fastener (5) of the composite material frame body (1) and the metal material mounting base (2b) is as follows: the metal connector (9) is connected to the composite material frame body (1), the threaded fastener (5) is connected to the metal connector (9), and an insulating layer (12) is provided between the metal connector (9) and the composite material frame body (1).

8. The bogie according to claim 7, characterized in that, The metal connector (9) includes a large diameter portion (9a) and a small diameter portion (9b). The small diameter portion (9b) is connected to the hole in the main body of the composite material frame. The large diameter portion (9a) is provided with an anti-rotation groove (9c). The nut (10) that cooperates with the threaded fastener (5) is locked in the anti-rotation groove (9c).

9. The bogie according to any one of claims 1-5, characterized in that, The main body of the composite material frame is provided with a metal busbar (3), and all conductive parts of the frame are connected to the metal busbar (3).

10. A rail vehicle, including a bogie, characterized in that, The bogie is the bogie described in any one of claims 1-9.

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