Chassis front end structure, chassis and rail vehicle

Abstract

The embodiment of the invention provides a chassis front-end structure, a chassis and a railway vehicle. The chassis front-end structure comprises an end beam, a front beam and a rear beam, the anti-climbing mounting seats and the reinforcing seats are in one-to-one correspondence, and the reinforcing seats are fixedly arranged on the longitudinal rear sides of the end beams; the supporting plate assemblies are in one-to-one correspondence with the anti-climbing mounting seats, one ends of the supporting plate assemblies are located on the rear side of the end beam in the longitudinal direction and are continuous with the anti-climbing mounting seats in the longitudinal direction, and the other ends of the supporting plate assemblies are used for being fixed to the rear baffle. The anti-climbing mounting bases are symmetrically arranged on the two transverse sides of the end beam, the reinforcing base is arranged on the rear side of each anti-climbing mounting base, supporting and reinforcing are carried out, the connecting strength between the anti-climbing mounting bases and the end beam is enhanced, meanwhile, the local structural rigidity is improved, and cracking caused by stress concentration is avoided; meanwhile, each anti-climbing mounting base corresponds to one supporting plate assembly, structural transition from the anti-climbing mounting bases to the rear baffle is achieved, a continuous stress path is formed, the overall bearing capacity is improved, and it is guaranteed that loads are transmitted stably and reliably.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail vehicles, in particular to a bottom frame front end structure, a bottom frame and a rail vehicle. BACKGROUND

[0002] Rail transit is a popular mode of transportation for users, and safety has always been the focus of relevant units. Therefore, in the vehicle design process, the strength requirement of the vehicle is getting higher and higher. As the main load-bearing structure and safety-providing structure of the vehicle, the vehicle body has put the improvement of the strength of the vehicle body as the top priority.

[0003] The bottom frame front end structure is composed of a front end framework, a floor, an inner pillow cross beam, an inner pillow longitudinal beam and a side beam. The front end framework is a supporting component and a main load-bearing component of the front end of the bottom frame, which is composed of a traction beam, a bolster beam, a cab side beam, a cross beam, a supporting beam and an installation accessory. The traction beam includes a coupler mounting seat, which is a main load-bearing component. The coupler mounting seat area is also the focus of vehicle body loading inspection.

[0004] With the improvement of the safety requirements of railway vehicles, the control car head of the train should be equipped with an anti-climbing energy-absorbing device. However, the existing bottom frame front end structure does not have the condition to install the anti-climbing energy-absorbing device, and the load brought by the anti-climbing energy-absorbing device is large. The existing structure strength does not meet the condition of directly installing the anti-climbing mounting seat. SUMMARY

[0005] The present application provides a bottom frame front end structure, a bottom frame and a rail vehicle to solve the problem that the existing bottom frame front end structure does not meet the structural strength requirement of installing an anti-climbing energy-absorbing device.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme:

[0007] A bottom frame front end structure, comprising:

[0008] an end beam;

[0009] an anti-climbing mounting seat symmetrically arranged on both sides of the end beam in the transverse direction;

[0010] a reinforcing seat corresponding to the anti-climbing mounting seat, the reinforcing seat being fixed to the longitudinal rear side of the end beam;

[0011] a support plate assembly corresponding to the anti-climbing mounting seat, one end of the support plate assembly being located on the rear side of the end beam in the longitudinal direction and being continuous with the anti-climbing mounting seat in the longitudinal direction, and the other end of the support plate assembly being used for fixing with a rear baffle.

[0012] Optionally, further comprising:

[0013] The first inclined support beam is fixed at one end of the joint between the end beam and the support plate and is fixed at the other end with the side beam;

[0014] The second inclined support beam is fixed at one end of the joint between the end beam and the support plate and is fixed at the other end with the traction beam.

[0015] Optionally, the anti-climbing mounting seat comprises:

[0016] The anti-climbing energy-absorbing cover and the anti-climbing tooth mounting panel are located on the front side of the anti-climbing energy-absorbing cover.

[0017] The reinforcing pipe is located in the anti-climbing energy-absorbing cover, and the longitudinal front side is fixed with the anti-climbing tooth mounting panel, and the longitudinal rear side is connected with the end beam.

[0018] The anti-climbing energy-absorbing cover and the longitudinal front side of the reinforcing pipe are provided with an induction hole.

[0019] Optionally, the anti-climbing mounting seat further comprises:

[0020] The pipe seat is fixed on the end beam, and the pipe seat is sleeved on the outside of the reinforcing pipe to support the reinforcing pipe.

[0021] Optionally, the reinforcing seat comprises an inclined plate and two side plates, and the two side plates are located at the transverse two ends of the inclined plate.

[0022] The top end of the inclined plate has a horizontal bending part extending in the horizontal direction, and the bottom end has a vertical bending part extending downward in the vertical direction, and the horizontal bending part and the vertical bending part are located on the same side of the inclined plate. The middle section of the inclined plate is also provided with a reinforcing part, and in the vertical projection direction, the reinforcing part is flush with the top end of the reinforcing pipe.

[0023] Optionally, it further comprises:

[0024] The reinforcing plate is fixed on the longitudinal rear surface of the end beam, and in the vertical direction, the reinforcing plate corresponds to part of the reinforcing pipe.

[0025] The support plate assembly, the first inclined support beam assembly, and the second inclined support beam assembly are all welded and fixed with part of the reinforcing plate.

[0026] Optionally, the cross section of the first inclined support beam assembly and the second inclined support beam is a Chinese character "Fang" shape.

[0027] The application provides a bottom frame, comprising a traction beam assembly, a sleeper beam assembly, a side beam, a rear baffle, a plurality of cross beams, and a bottom frame front end structure according to any one of the above embodiments.

[0028] The traction beam assembly is located in the middle of the vehicle body, the side beams are located on both sides of the vehicle body, and a plurality of cross beams are arranged between the side beams and the traction beam assembly; the bolster assembly is located on the longitudinal rear side of the traction beam assembly; and the rear baffle is located on the rear side of the end beam and between the side beams and the traction beam assembly in the transverse direction.

[0029] Optionally, the method further comprises:

[0030] The car coupler mounting seat is located on the longitudinal front end of the traction beam assembly, and the transverse ends of the car coupler mounting seat protrude from the traction beam assembly.

[0031] The application provides a rail vehicle, which comprises a driver's cabin and the underframe according to any one of the above embodiments.

[0032] The application provides an underframe front end structure, which comprises an end beam, anti-climbing mounting seats arranged symmetrically on the transverse sides of the end beam, a reinforcing seat corresponding to each anti-climbing mounting seat, the reinforcing seat being fixed to the longitudinal rear side of the end beam, and a support plate assembly corresponding to each anti-climbing mounting seat, one end of the support plate assembly being located on the rear side of the end beam in the longitudinal direction and being continuous with the anti-climbing mounting seat in the longitudinal direction, and the other end of the support plate assembly being used for fixing the rear baffle.

[0033] Compared with the prior art, the underframe front end structure, the underframe and the rail vehicle provided in the application have the following technical effects:

[0034] The anti-climbing mounting seats are arranged symmetrically on the transverse sides of the end beam, the rear side of each anti-climbing mounting seat is provided with a reinforcing seat for supporting and reinforcing and enhancing the connection strength between the anti-climbing mounting seat and the end beam, the local structure stiffness is improved, stress concentration is avoided, and cracking is prevented; meanwhile, each anti-climbing mounting seat is also provided with a corresponding support plate assembly, the structure transition between the anti-climbing mounting seat and the rear baffle is realized, a continuous stress path is formed, the overall load carrying capacity is improved, and the load transmission is stable and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate certain illustrative embodiments of the application and together with their description serve to explain the application. In the drawings:

[0036] Figure 1 FIG. 1 is a structural schematic diagram of an underframe provided in an embodiment of the application;

[0037] Figure 2 FIG. 2 is a structural schematic diagram of an underframe front end structure provided in an embodiment of the application;

[0038] Figure 3 FIG. 3 is a top view structural schematic diagram of the underframe provided in the embodiment of the application; and Figure 2 FIG. 4 is a top view structural schematic diagram of the underframe provided in the embodiment of the application.

[0039] Figure 4 Structure diagram of the car coupler mounting seat;

[0040] Figure 5 Structure diagram of the reinforcing pipe provided by the embodiment of the application;

[0041] Figure 6 Structure diagram of the mounting structure of the reinforcing seat provided by the embodiment of the application;

[0042] Figure 7 Structure diagram of the second inclined support beam provided by the embodiment of the application;

[0043] Figure 8 Structure diagram of the first inclined support beam provided by the embodiment of the application.

[0044] The signs in the drawings are as follows:

[0045] The chassis front end structure 81100, the drawbar assembly 81200, the bolster assembly 81300, the side sill 81400, the rear baffle 81500, the cross sill 81600, the car coupler mounting seat 81700, and the floor assembly 81800;

[0046] The end sill 811, the anti-climbing mounting seat 812, the reinforcing seat 813, the support plate assembly 814, the first inclined support beam assembly 815, the second inclined support beam assembly 816, and the reinforcing plate 817;

[0047] The anti-climbing energy-absorbing cover 8121, the anti-climbing tooth mounting panel 8122, the reinforcing pipe 8123, the guide hole 8124, and the pipe seat 8125. DETAILED DESCRIPTION

[0048] The embodiment of the application discloses a chassis front end structure, a chassis and a railway vehicle, so as to solve the problem that the existing chassis front end structure does not meet the structural strength requirement of installing an anti-climbing energy-absorbing device.

[0049] In order to make the technical solutions and advantages of the embodiments of the application clearer, the exemplary embodiments of the application are further described in detail below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the application, rather than all the embodiments. It should be noted that the embodiments and features in the embodiments can be combined with each other without conflict.

[0050] Please refer to Figures 1-8 , Figure 1 Structure diagram of the chassis provided by the embodiment of the application; Figure 2 Structure diagram of the chassis front end structure provided by the embodiment of the application; Figure 3 Structure diagram of the chassis front end structure provided by the embodiment of the application; Figure 2 Structure diagram of the chassis front end structure provided by the embodiment of the application;Figure 4 Structure diagram of the car hook mounting seat; Figure 5 Structure diagram of the reinforcing pipe provided in the embodiment of the application; Figure 6 Structure diagram of the mounting structure of the reinforcing seat provided in the embodiment of the application; Figure 7 Structure diagram of the second inclined support beam provided in the embodiment of the application; Figure 8 Structure diagram of the first inclined support beam provided in the embodiment of the application.

[0051] In a specific embodiment, the front end structure 81100 of the underframe provided in the application comprises an end beam 811, an anti-climbing mounting seat 812, a reinforcing seat 813 and a support plate assembly 814; the end beam 811 is the main force-bearing structure of the front end of the car body underframe, and bears the force transmitted from various structures such as the anti-climbing device, the support plate, the rear baffle 81500, etc., and generally adopts high-strength steel. The anti-climbing mounting seats 812 are arranged in pairs on the transverse sides of the end beam 811, and serve as the mounting bases of the anti-climbing device, absorbing energy in a collision and reducing the transmission of impact force to the interior of the car body to prevent derailment or superposition of trains in a head-on collision.

[0052] Corresponding reinforcing seats 813 are arranged behind each anti-climbing mounting seat 812, and the reinforcing seats 813 are fixed to the longitudinal rear side of the end beam 811 for support and reinforcement; the reinforcing seats 813 are generally welded from steel plates and are in the shape of L or T, and are fixedly welded to the end beam 811 to enhance the connection strength between the anti-climbing mounting seat 812 and the end beam 811, improve the local structural rigidity and avoid cracking caused by stress concentration.

[0053] Meanwhile, corresponding support plate assemblies 814 are arranged behind each anti-climbing mounting seat 812, and the support plate assemblies 814 are arranged on the rear side of the end beam 811 and longitudinally continuously arranged with the anti-climbing mounting seat 812, and the other end is used for fixed connection with the rear baffle 81500 to realize the structural transition between the anti-climbing mounting seat 812 and the rear baffle 81500; the support plate assemblies 814 are fixedly welded to the end beam 811.

[0054] Compared with the prior art, the underframe front end structure 81100, the underframe and the railway vehicle provided in the embodiment of the application have the following technical effects:

[0055] The anti-climbing mounting seats 812 are symmetrically arranged on the transverse sides of the end beam 811, the rear side of each anti-climbing mounting seat 812 is provided with a reinforcing seat 813 for support and reinforcement, the connection strength between the anti-climbing mounting seat 812 and the end beam 811 is enhanced, the local structural rigidity is improved at the same time, and cracking caused by stress concentration is avoided; meanwhile, each anti-climbing mounting seat 812 also corresponds to a support plate assembly 814 to realize the structural transition between the anti-climbing mounting seat 812 and the rear baffle 81500, form a continuous force-bearing path, improve the overall carrying capacity and ensure stable and reliable load transmission.

[0056] In a specific embodiment, the front-end chassis structure 81100 further comprises a first inclined support beam assembly 815, one end of which is fixed at the connection between the end beam 811 and the support plate assembly 814, and the other end is used for fixing with the side beam 81400;

[0057] and / or a second inclined support beam assembly 816, one end of which is fixed at the connection between the end beam 811 and the support plate assembly 814, and the other end is used for fixing with the traction beam assembly 81200.

[0058] The first inclined support beam assembly 815 is connected at the connection area between the end beam 811 and the support seat assembly, and the other end is connected to the vehicle body side beam 81400, arranged obliquely to form a stress path from the front end of the chassis to the side structure; the second inclined support beam assembly 816 is also connected at the connection area between the end beam 811 and the support plate assembly 814, and the other end is connected to the traction beam assembly 81200, also arranged obliquely to form a stress path from the front end to the bottom traction structure. The inclined support beam assembly forms a spatial stress frame by connecting the front-end structure with the side beam 81400 or the traction beam, significantly enhancing the bending and torsion resistance of the front-end chassis structure 81100. In the frontal collision or traction working condition, the load can be more evenly transmitted to the side beam 81400 or the traction beam through the inclined support beam, reducing local stress concentration and preventing cracking at weak points. The inclined support beam assembly can be provided as a box beam, using standard profiles or welded assemblies for easy mass production. The cross sections of the first inclined support beam assembly 815 and the second inclined support beam are both in the shape of a Chinese character.

[0059] In another embodiment, the anti-climbing mounting seat 812 comprises:

[0060] an anti-climbing energy-absorbing cover 8121 and an anti-climbing tooth mounting panel 8122, the anti-climbing tooth mounting panel 8122 being located on the front side of the anti-climbing energy-absorbing cover 8121;

[0061] a reinforcing pipe 8123 located inside the anti-climbing energy-absorbing cover 8121, the longitudinal front side of which is fixed with the anti-climbing tooth mounting panel 8122, and the longitudinal rear side of which is butted against the end beam 811;

[0062] Both the anti-climbing energy-absorbing cover 8121 and the reinforcing pipe 8123 are provided with an induction hole 8124 on the longitudinal front side.

[0063] The anti-climbing tooth mounting panel 8122, as the mounting base of the anti-climbing device, is usually made of high-strength steel plate material, has good impact performance, and is provided with a plurality of mounting holes or positioning grooves for facilitating assembly. An anti-climbing energy-absorbing cover 8121 is arranged at the rear of the anti-climbing tooth mounting panel 8122, forms a semi-closed space, is used for accommodating a reinforcing pipe 8123, has an energy-absorbing function, and can be subjected to controllable compression deformation in a frontal impact. The reinforcing pipe 8123 is located inside the anti-climbing energy-absorbing cover 8121, is connected to the anti-climbing tooth mounting panel 8122 at the longitudinal front side, and is butted against the end beam 811 at the longitudinal rear side. The reinforcing pipe 8123 can be a hollow steel pipe or a profiled section material with a higher axial crushing strength, and can meet different collision energy-absorbing requirements by replacing reinforcing pipes of different specifications. Meanwhile, an induction hole 8124 is arranged at the longitudinal front side of the anti-climbing energy-absorbing cover 8121 and the reinforcing pipe 8123, is used for guiding the material to be subjected to buckling or folding in a predetermined direction when subjected to pressure, so as to improve the energy-absorbing efficiency and avoid brittle fracture of the structure. The induction hole 8124 is a strip-shaped hole, and is arranged in the circumferential direction of the anti-climbing energy-absorbing cover 8121 and the reinforcing pipe 8123, respectively. The anti-climbing energy-absorbing cover 8121 is arranged in a rectangular structure.

[0064] The reinforcing pipe 8123 extends from the anti-climbing tooth mounting panel 8122 to the end beam 811, forms a high-rigidity force transmission channel, can effectively bear traction, braking force and car hook load, and improves the running stability of the whole vehicle. When the train is subjected to a frontal impact, the anti-climbing mounting seat 812 is the first to bear the impact, and the anti-climbing teeth prevent the vehicles from being stacked; the energy-absorbing cover and the reinforcing pipe 8123 are subjected to controllable compression deformation, and a large amount of kinetic energy is absorbed; and the presence of the induction hole 8124 can ensure that the deformation is performed in the expected manner, and sudden fracture or instability is avoided.

[0065] Meanwhile, in order to enhance the connection stability between the reinforcing pipe 8123 and the end beam 811, the anti-climbing mounting seat 812 further includes a pipe seat 8125 fixed on the end beam 811. The pipe seat 8125 is a sleeve type structure, is sleeved outside the reinforcing pipe 8123, plays a role of positioning and supporting, is fixed with the end beam 811 by welding, and can be understood that the inner diameter of the pipe seat 8125 is slightly larger than the outer diameter of the reinforcing pipe 8123, so as to facilitate assembly and allow a certain deformation space. The pipe seat 8125 provides an additional support point for the reinforcing pipe 8123, prevents the reinforcing pipe 8123 from being deviated or unstable due to excessive force, and improves the overall rigidity of the structure.

[0066] In another embodiment, the reinforcing seat 813 is arranged on the support plate group 814, includes an inclined plate and two side plates, and the two side plates are located at the transverse two ends of the inclined plate.

[0067] The top end of the inclined plate has a horizontal bending part extending in the horizontal direction, the bottom end has a vertical bending part extending downward in the vertical direction, and the horizontal bending part and the vertical bending part are located on the same side surface of the inclined plate. The middle section of the inclined plate is further provided with a reinforcing part, and in the vertical projection direction, the reinforcing part is flush with the top end of the reinforcing pipe 8123.

[0068] The inclined plate is arranged obliquely, the load can be smoothly transmitted from the anti-climbing mounting base 812 to the end beam 811, and a reinforcing rib or a rib plate can be arranged to improve the local rigidity; the horizontal bending part is arranged at the top end of the inclined plate and extends to the side close to the end beam 811 and is connected with the end beam 811; the vertical bending part is located at the bottom end of the inclined plate, extends downward in the vertical direction, and is seated on and welded to the support plate assembly 814 to enhance the connection strength of the bottom; the reinforcing part is arranged at the middle segment of the inclined plate and is flush with the top end of the reinforcing pipe 8123 in the straight projection direction; the purpose is to form matching in the structural height so that the force transmitted by the reinforcing pipe 8123 directly acts on the reinforcing part; it can be a thickened area, a welded rib or a local protruding structure. The angle design of the inclined plate is beneficial to smooth force flow transmission; the bending part provides a multi-directional connection interface to adapt to different assembly requirements; the reinforcing part is aligned with the top end of the reinforcing pipe 8123 to ensure uniform stress on the key parts.

[0069] Further, the above-mentioned front end structure 81100 of the chassis further includes a reinforcing plate 817 fixedly arranged on the longitudinal rear vertical surface (i.e. the side facing the middle part of the vehicle body) of the end beam 811; aligned or coincided with part of the reinforcing pipe 8123 in the vertical direction to form force flow matching; usually a high-strength steel plate, which can be fixed with the end beam 811 by welding, bolting or the like; it can be in the form of a single piece or multiple pieces, and the overall rigidity is enhanced by arranging the reinforcing plate 817.

[0070] In one embodiment, the chassis of the present application includes a front end structure 81100 of the chassis, a traction beam assembly 81200, a bolster beam assembly 81300, a bolster inner cross beam 81600 assembly, a coupler mounting base 81700, a bolster inner longitudinal beam assembly, a floor assembly 81800, a side beam 81400, a rear baffle 81500, and a plurality of cross beams 81600; the traction beam assembly 81200 is located in the middle part of the vehicle body, the side beam 81400 is located on both sides of the vehicle body, and a plurality of cross beams 81600 are arranged between the side beam 81400 and the traction beam assembly 81200; the bolster beam assembly 81300 is located on the longitudinal rear side of the traction beam assembly 81200; the rear baffle 81500 is located on the rear side of the end beam 811 and is located between the side beam 81400 and the traction beam assembly 81200 in the transverse direction.

[0071] The cross beam 81600 is directly connected with the traction beam assembly 81200, the height of the cross beam 81600 is reduced, the iron floor heights of the driver's cabin area and the passing platform area are unified, the process difficulty is reduced and the internal space of the driver's cabin is increased; at the same time, the support plate assembly 814 of the front end structure 81100 of the chassis is arranged to be lower than the floor by one plate thickness, the iron floor heights of the driver's cabin area and the passing platform area are unified, the process difficulty is reduced and the internal space of the driver's cabin is increased.

[0072] The car coupler mounting seat 81700 is located at the longitudinal front end of the drawbar assembly 81200, and the lateral ends of the car coupler mounting seat 81700 protrude from the drawbar assembly 81200. The car coupler mounting seat 81700 is welded against the single-piece drawbar end face, so that the weld is no longer subjected to shear transmission of load, and the tensile and compressive load received by the car coupler mounting seat 81700 is directly transmitted to the single-piece drawbar, so that the load-carrying capacity is improved.

[0073] The application also provides a rail vehicle, comprising a cab and the underframe according to any one of the above embodiments.

[0074] Although the preferred embodiments of the application have been described, those skilled in the art who, once aware of the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the application.

[0075] Obviously, those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the claims of the application and their equivalent technologies, the application also intends to include these modifications and variations.

Claims

1. A front end structure of an underframe, characterized in that: Comprising: End beams; Anti-climbing mounting seats, symmetrically arranged on both lateral sides of the end beams; Reinforcement seats, corresponding to the anti-climbing mounting seats one by one, the reinforcement seats being fixedly provided at the longitudinal rear side of the end beams; Support plate assemblies, corresponding to the anti-climbing mounting seats one by one, one end of the support plate assemblies being longitudinally located at the rear side of the end beams and being continuous with the anti-climbing mounting seats longitudinally, and the other end of the support plate assemblies being used for fixing to the rear baffle.

2. The front end structure of the chassis according to claim 1, characterized in that: Further comprising: First inclined support beam assemblies, one end being fixed at the connection between the end beams and the support plate assemblies, and the other end being used for fixing to the side beams; And / or, second inclined support beam assemblies, one end being connected to the connection between the end beams and the support plate assemblies, and the other end being used for fixing to the drawbar beam assemblies.

3. The front end structure of the chassis according to claim 2, characterized in that: The anti-climbing mounting seats include: Anti-climbing energy-absorbing covers and anti-climbing tooth mounting panels, the anti-climbing tooth mounting panels being located at the front side of the anti-climbing energy-absorbing covers; Reinforcement tubes, located inside the anti-climbing energy-absorbing covers, being fixedly connected to the anti-climbing tooth mounting panels at the longitudinal front side and being butt-jointed to the end beams at the longitudinal rear side; Inducing holes are provided on both the longitudinal front sides of the anti-climbing energy-absorbing covers and the reinforcement tubes.

4. The front end structure of the chassis according to claim 3, characterized in that: The anti-climbing mounting seats further include: Tube seats, fixed on the end beams, the tube seats being sleeved outside the reinforcement tubes and used for supporting the reinforcement tubes.

5. The front end structure of the chassis according to claim 3, characterized in that: The reinforcement seats include inclined plates and two side plates, the two side plates being located at the lateral two ends of the inclined plates; The top end of the inclined plate has a horizontally extending horizontal bent portion, and the bottom end has a vertically extending vertical bent portion, the horizontal bent portion and the vertical bent portion being located on the same side of the inclined plate; a reinforcement portion is further provided in the middle section of the inclined plate, and in the vertical projection direction, the reinforcement portion is flush with the top end of the reinforcement tube.

6. The front end structure of the chassis according to claim 3, characterized in that: Further comprising: Reinforcement plates, fixedly provided on the longitudinal rear facade of the end beams, and corresponding to some of the reinforcement tubes in the vertical direction; The support plate assemblies, the first inclined support beam assemblies, and the second inclined support beam assemblies are all fixedly welded to some of the reinforcement plates.

7. The front end structure of the chassis according to claim 1, characterized in that: The cross-sections of the first inclined support beam assemblies and the second inclined support beams are both in a U-shape.

8. A chassis, characterized in that: Comprising drawbar beam assemblies, bolster beam assemblies, side beams, rear baffles, a plurality of cross beams, and the front-end structure of the underframe according to any one of claims 1-7; The drawbar beam assemblies are located in the middle of the vehicle body, the side beams are located on both sides of the vehicle body, and a plurality of cross beams are provided between the side beams and the drawbar beam assemblies; the bolster beam assemblies are located at the longitudinal rear side of the drawbar beam assemblies; the rear baffles are located at the rear side of the end beams and are transversely located between the side beams and the drawbar beam assemblies.

9. The chassis according to claim 8, characterized in that Further comprising: Coupler mounting seats, located at the longitudinal front end of the drawbar beam assemblies, and the lateral two ends of the coupler mounting seats respectively protrude from the drawbar beam assemblies.

10. A rail vehicle, characterized in that: Comprising a driver's cab and the underframe according to any one of claims 8-9.

Images