Underframe structure and railway vehicle

Abstract

The chassis structure comprises an aluminum alloy frame and a carbon fiber section floor, the aluminum alloy frame comprises two side beams and a plurality of sleeper beams, the two side beams are arranged in parallel, the two ends of each sleeper beam are connected to the two side beams, and the two ends of each sleeper beam are connected to the carbon fiber section floor. The two sides of the carbon fiber profile floor are connected to the two side beams through first fasteners, the sleeper beam is located below the carbon fiber profile floor to bear the carbon fiber profile floor, the bogie connector component is arranged at the lower end of the sleeper beam, and the bogie structural component is arranged on the sleeper beam, so that the high-stress bearing requirement of the bogie can be met; in addition, by the adoption of the underframe structure combining the aluminum alloy frame and the carbon fiber section floor, the lightweight requirement can be effectively met on the basis that the bearing requirement is met, and in addition, compared with existing underframe structures formed in a large number in a welding mode, the size precision of the underframe can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle technology, and in particular to a chassis structure and a rail vehicle. Background Technology

[0002] Existing rail vehicle underframe structures are typically made of aluminum alloy or stainless steel, which, while meeting load-bearing requirements, are relatively heavy. Especially for high-speed rail vehicles, achieving weight reduction while maintaining load-bearing capacity is a key technical challenge that the industry needs to address.

[0003] In addition, existing rail vehicle underframe structures typically employ extensive welding, leading to significant deformation of the underframe structure and consequently, larger dimensional tolerances for the entire vehicle. Furthermore, some installation joints are also usually connected to the underframe by welding, making it difficult to meet the connection requirements of high-precision components.

[0004] Therefore, how to provide a lightweight and high-precision chassis structure is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a chassis structure and rail vehicle that can meet the requirements of lightweight and high precision.

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

[0007] A chassis structure includes an aluminum alloy frame and a carbon fiber profile floor. The aluminum alloy frame includes two side beams and multiple sleeper beams. The two side beams are arranged parallel to each other, and both ends of the multiple sleeper beams are connected to the two side beams. Both sides of the carbon fiber profile floor are connected to the two side beams by first fasteners, and the sleeper beams are located below the carbon fiber profile floor to support it. The lower end of the sleeper beam is provided with a bogie interface component.

[0008] In some embodiments, the upper surface of the carbon fiber profile floor is provided with overlapping edges on both sides, the overlapping edges are connected to the side beam by the first fastener, and the bottom of the carbon fiber profile floor is connected to the pillow beam by the second fastener.

[0009] In some embodiments, the lower surface of the side beam is provided with an under-vehicle equipment mounting and hanging interface.

[0010] In some embodiments, the pillow beam is provided with weight-reducing holes.

[0011] In some embodiments, the weight reduction hole is provided with a removable process support.

[0012] In some embodiments, the process support includes longitudinal bars and transverse bars, the longitudinal bars extending along the length of the bolster beam and the transverse bars perpendicular to the longitudinal bars.

[0013] In some embodiments, the bottom of the two side beams is provided with mounting grooves, and both ends of the pillow beam are located in the mounting grooves.

[0014] In some embodiments, the carbon fiber profile floor is a longitudinal double-layer carbon fiber profile floor.

[0015] In some embodiments, the lower surface of the carbon fiber profile floor is provided with a mounting base.

[0016] A rail vehicle comprising the underframe structure described in any of the preceding claims.

[0017] Compared with existing technologies, the above technical solution has the following advantages:

[0018] The present invention provides a chassis structure comprising an aluminum alloy frame and a carbon fiber profile floor. The aluminum alloy frame includes two side beams and multiple bolster beams. The two side beams are arranged parallel to each other, and both ends of the multiple bolster beams are connected to the two side beams. Both sides of the carbon fiber profile floor are connected to the two side beams by first fasteners, and the bolster beams are located below the carbon fiber profile floor to support it. The lower end of the bolster beam is provided with a bogie interface component. By setting the bogie structural component on the bolster beam, the high stress load-bearing requirements of the bogie can be met. In addition, by adopting a chassis structure combining an aluminum alloy frame and a carbon fiber profile floor, the weight reduction requirement can be effectively achieved while meeting the load-bearing requirements. Furthermore, compared with existing chassis structures that are largely formed by welding, the dimensional accuracy of the chassis can be effectively improved. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 A schematic diagram of an aluminum alloy frame with a base structure provided for a specific embodiment of this utility model;

[0021] Figure 2 for Figure 1 A partial structural diagram of the upper part of the side beams and sleeper beams;

[0022] Figure 3 for Figure 1A partial structural diagram of the bottom of the side beams and sleeper beams;

[0023] Figure 4 This is a cross-sectional view of the aluminum alloy frame.

[0024] Figure 5 This is a structural schematic diagram of carbon fiber profile flooring;

[0025] Figure 6 A schematic diagram of a carbon fiber profile floor connected to an aluminum alloy frame;

[0026] Figure 7 This is a schematic diagram of a partial bottom structure of the underframe structure.

[0027] The attached figures are labeled as follows:

[0028] 10-Side beam, 11-Under-vehicle equipment mounting and hanging interface, 12-Mounting slot;

[0029] 20-Sleeper beam, 21-Bogie interface component, 22-Weight reduction hole, 23-Process support;

[0030] 30 - Carbon fiber profile flooring, 31 - Overlapping edge, 32 - Mounting base;

[0031] 40 - Under-vehicle equipment mounting frame. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please refer to Figures 1 to 7 .

[0034] This utility model provides a chassis structure comprising an aluminum alloy frame and a carbon fiber profile floor 30. The aluminum alloy frame includes two side beams 10 and multiple bolster beams 20. The two side beams 10 are arranged parallel to each other, and both ends of the multiple bolster beams 20 are connected to the two side beams 10. The length extension direction of the bolster beams 20 is perpendicular to the length extension direction of the side beams 10, i.e., the bolster beams 20 are arranged along the vehicle width direction to form a frame structure with the side beams 10. Preferably, the multiple bolster beams 20 are parallel to each other and evenly spaced. The specific number of bolster beams 20 can be determined according to actual needs, and this embodiment does not specifically limit this. The two ends of the bolster beams 20 are connected to the side beams 10 by laser composite welding. Specifically, the upper surfaces of the two ends of the bolster beams 20 are connected to the lower surfaces of the connecting edges provided on the inner side of the side beams 10 by laser composite welding. This welding method can reduce heat input, thereby improving the dimensional accuracy of the aluminum alloy frame. The main parameters of the chassis structure, such as the length, width, and spacing of the bolster beams 20, can be controlled within ±2mm. Both sides of the carbon fiber profile floor 30 are connected to the two side beams 10 by the first fasteners, and the bolster beam 20 is located below the carbon fiber profile floor 30 to support the carbon fiber profile floor 30. The lower end of the bolster beam 20 is provided with a bogie interface component 21. By setting the bogie structural components on the bolster beam 20, the high stress bearing requirements of the bogie can be met. In addition, by adopting a base frame structure that combines an aluminum alloy frame and a carbon fiber profile floor 30, the lightweight requirements can be effectively achieved while meeting the bearing requirements.

[0035] In some embodiments, such as Figure 6 As shown, the carbon fiber profile floor 30 has overlapping edges 31 on both sides of its upper surface. The lower surface of the overlapping edges 31 contacts the upper surface of the side beam 10. The overlapping edges 31 are connected to the side beam 10 by a first fastener, which can be a bolt or a rivet. Multiple rows of connecting holes can be provided on the overlapping edges 31, with each row of connecting holes extending along the length of the side beam 10. The bottom of the carbon fiber profile floor 30 is connected to the sleeper beam 20 by a second fastener, which can also be a bolt or a rivet. Specifically, the sleeper beam 20 has a riveting countersunk hole, through which the rivet can pass to connect the carbon fiber composite profile floor and the sleeper beam 20.

[0036] In some embodiments, such as Figure 7As shown, the lower surface of the side beam 10 is provided with an under-vehicle equipment mounting interface 11. For example, the under-vehicle equipment mounting frame 40 can be bolted to the under-vehicle equipment mounting interface 11. Multiple sets of under-vehicle equipment mounting interfaces 11 can be provided on the lower surfaces of the two side beams 10 respectively. The under-vehicle equipment mounting interface 11 can be a strip hole extending along the length direction of the side beam 10. The position of the under-vehicle equipment mounting frame 40 in the length direction of the chassis can be adjusted through the strip hole. The two ends of the under-vehicle equipment mounting frame 40 can be bolted to the connecting holes to realize the installation of the under-vehicle equipment. The under-vehicle equipment can be connected to the under-vehicle equipment frame with fasteners.

[0037] In some embodiments, such as Figure 7 As shown, the bolster beam 20 is provided with weight-reducing holes 22, which can effectively reduce its weight. For example, multiple weight-reducing holes 22 distributed along the length of the bolster beam 20 can be provided on the bolster beam 20. The weight-reducing holes 22 can be rectangular in shape, with rounded inner corners to reduce stress concentration.

[0038] In some embodiments, such as Figure 7 As shown, for the bogie with fewer interfaces, if the weight reduction hole 22 is large, a detachable process support 23 can be set in the weight reduction hole 22. The process support 23 can be reserved appropriately during the processing of the bogie 20 to facilitate the transfer of parts in the subsequent production process. After the aluminum alloy frame is connected to the carbon fiber profile base plate, the process support 23 can be removed.

[0039] In some embodiments, such as Figure 7 As shown, the process support 23 includes longitudinal bars and transverse bars, which are arranged alternately. The longitudinal bars extend along the length of the bolster beam 20, and the transverse bars are perpendicular to the longitudinal bars. For example, a weight-reducing hole 22 can be provided on the bolster beam 20, and a longitudinal bar is provided in the middle of the weight-reducing hole 22. Multiple transverse bars are provided on both sides of the longitudinal bar. The longitudinal bars and transverse bars can effectively ensure its structural strength. The longitudinal bars and transverse bars can be integrally formed with the bolster beam 20. After the bolster beam 20 is connected to the carbon fiber profile base plate, the longitudinal bars and transverse bars are cut off to reduce weight.

[0040] In some embodiments, such as Figure 7 As shown, the bottom of the two side beams 10 is provided with mounting grooves 12, and the two ends of the bolster beam 20 are located in the mounting grooves 12. The mounting grooves 12 can limit the position of the bolster beam 20 in the length direction of the side beams 10, thereby ensuring the installation accuracy of the bolster beam 20.

[0041] In some embodiments, such as Figure 5 and Figure 6As shown, the carbon fiber profile floor 30 is a continuous longitudinal double-layer carbon fiber profile floor 30. Typically, the longitudinal double-layer carbon fiber profile floor 30 is assembled by bonding with structural adhesive. The cavity of the longitudinal double-layer carbon fiber profile floor 30 and the sleeper beam 20 form a composite mesh load-bearing structure to improve the normal stiffness of the underframe structure. This allows it to withstand the extreme airtight loads caused by the harsh operating conditions of high-speed rail vehicles and reduce deformation of the underframe structure. Besides using double-layer carbon fiber profiles to make the floor, a sandwich carbon fiber structure can also be used.

[0042] In some embodiments, such as Figure 7 As shown, the lower surface of the carbon fiber profile floor 30 is provided with a mounting base 32. The mounting base 32 can be an aluminum alloy or carbon fiber hanging bracket mounting base. The mounting base 32 can be connected to the carbon fiber profile floor 30 by riveting. The mounting base 32 can be used in conjunction with the under-vehicle equipment mounting and hanging interface 11 on the side beam 10 to realize the installation of the under-vehicle equipment mounting frame 40, and can further improve the structural rigidity of the middle part of the carbon fiber profile floor 30.

[0043] This utility model embodiment also provides a rail vehicle, including the chassis structure provided in any of the above embodiments. Regarding the beneficial effects of the rail vehicle, please refer to the chassis structure in the above embodiments, which will not be repeated here.

[0044] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0046] The foregoing has provided a detailed description of the chassis structure and rail vehicle provided by this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A base frame structure, characterized in that, include: An aluminum alloy frame and a carbon fiber profile floor (30) are provided. The aluminum alloy frame includes two side beams (10) and multiple sleeper beams (20). The two side beams (10) are arranged parallel to each other. Both ends of the multiple sleeper beams (20) are connected to the two side beams (10). Both sides of the carbon fiber profile floor (30) are connected to the two side beams (10) by first fasteners. The sleeper beams (20) are located below the carbon fiber profile floor (30) to support the carbon fiber profile floor (30). The lower end of the sleeper beams (20) is provided with a bogie interface component (21).

2. The base frame structure according to claim 1, characterized in that, The carbon fiber profile floor (30) has overlapping edges (31) on both sides of its upper surface. The overlapping edges (31) are connected to the side beam (10) by the first fastener. The bottom of the carbon fiber profile floor (30) is connected to the pillow beam (20) by the second fastener.

3. The base frame structure according to claim 1, characterized in that, The lower surface of the side beam (10) is provided with a hanging interface (11) for installing equipment under the vehicle.

4. The base frame structure according to claim 1, characterized in that, The pillow beam (20) is provided with weight-reducing holes (22).

5. The base frame structure according to claim 4, characterized in that, The weight reduction hole (22) is equipped with a detachable process support (23).

6. The base frame structure according to claim 5, characterized in that, The process support (23) includes a longitudinal bar and a transverse bar, the longitudinal bar extending along the length of the bolster beam (20), and the transverse bar perpendicular to the longitudinal bar.

7. The base frame structure according to claim 1, characterized in that, The bottom of the two side beams (10) is provided with mounting grooves (12), and the two ends of the pillow beam (20) are located in the mounting grooves (12).

8. The base frame structure according to claim 1, characterized in that, The carbon fiber profile floor (30) is a full-length, longitudinal, double-layer carbon fiber profile floor (30).

9. The base frame structure according to claim 1, characterized in that, The lower surface of the carbon fiber profile floor (30) is provided with a mounting base (32).

10. A rail vehicle, characterized in that, Includes the base frame structure as described in any one of claims 1 to 9.

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