Vehicle underframe and rail vehicle

Abstract

The present application relates to the technical field of rail vehicles. Provided are a vehicle underframe and a rail vehicle. The vehicle underframe comprises side beams, first cross beams and second cross beams, wherein the first cross beams are connected between two oppositely arranged side beams, and each first cross beam comprises a first beam section and a second beam section located on at least one end of the first beam section; the second cross beams are connected between two oppositely arranged first cross beams, and the first beam sections are located between the two oppositely arranged second cross beams; and the top portions of the first beam sections and the top portions of the second cross beams enclose a first mounting area for mounting a light-transmitting member, and the bottom portions of the first beam section and the bottom portions of the second cross beams enclose a second mounting area for mounting a light-emitting member. The vehicle underframe provided in the present application can solve the defect in the prior art where a vehicle underframe is not fully functional. By means of the cooperation of the first cross beams and the second cross beams, the first mounting area for mounting the light-transmitting member and the second mounting area for mounting the light-emitting member are formed, thereby optimizing the function and structure of the vehicle underframe.

Description

Vehicle chassis and railway vehicle

[0001] Cross-reference to related applications

[0002] This application claims priority to the Chinese Patent Application No. 202410866210.2, filed on June 29, 2024, and entitled “Vehicle chassis and railway vehicle”, which is incorporated by reference in its entirety into the present disclosure. TECHNICAL FIELD

[0003] The present application relates to the technical field of railway vehicles, and in particular to a vehicle chassis and a railway vehicle. BACKGROUND

[0004] The railway vehicle needs to meet the structural strength requirement, and also needs to meet the sightseeing demand of the user, optimize the structure and weight of the vehicle chassis, and optimize the appearance of the vehicle, etc. Due to the structural limitation of the railway vehicle, it is difficult to meet multiple requirements at the same time. SUMMARY

[0005] The present application provides a vehicle chassis to solve the defect that the function of the vehicle chassis in the prior art is not perfect. By cooperating the first cross beam and the second cross beam, the first mounting area for mounting the light-transmitting piece and the second mounting area for mounting the light-emitting piece are provided, the installation of the light-transmitting piece and the light-emitting piece can be realized, and the function and structure of the vehicle chassis are optimized.

[0006] The present application provides a vehicle chassis, comprising:

[0007] a side beam;

[0008] a first cross beam connected between two oppositely arranged side beams, the first cross beam comprising a first beam segment and a second beam segment located at at least one end of the first beam segment;

[0009] a second cross beam connected between two oppositely arranged first cross beams, the first beam segment being located between two opposite second cross beams;

[0010] a top portion of the first beam segment and a top portion of the second cross beam forming a first mounting area for mounting a light-transmitting piece, and a bottom portion of the first beam segment and a bottom portion of the second cross beam forming a second mounting area for mounting a light-emitting piece.

[0011] According to the vehicle chassis provided by the application, the first cross beam comprises oppositely arranged first and second side walls, and a first channel with an open bottom is formed between the first and second side walls of the first beam segment; the second cross beam comprises oppositely arranged third and fourth side walls, and a second channel with an open bottom is formed between the third and fourth side walls; the first channel communicates with the second channel; the first side wall is connected to the third side wall through a first arc-shaped plate; the second side wall and the fourth side wall are connected through a second arc-shaped plate; and a spacing is provided between the first arc-shaped plate and the second arc-shaped plate to form a mounting opening.

[0012] According to the vehicle chassis provided by the application, a first gap is provided between the first arc-shaped plate, the first beam segment and the second cross beam; a first connecting plate is connected between the first arc-shaped plate, the first beam segment and the second cross beam, and the first connecting plate closes the first gap.

[0013] A second gap is provided between the second arc-shaped plate, the first beam segment and the second cross beam; a second connecting plate is connected between the second arc-shaped plate, the first beam segment and the second cross beam, and the second connecting plate closes the second gap.

[0014] According to the vehicle chassis provided by the application, the first and second side walls are connected through a first connecting wall, and the third and fourth side walls are connected through a second connecting wall; one or more wiring ports are provided in the first and second connecting walls, and the wiring ports communicate with one or more of the first and second channels.

[0015] According to the vehicle chassis provided by the application, one or more of the outer side of the first side wall of the first cross beam and the outer side of the third side wall of the second cross beam is connected to a floor connecting plate and / or a sub-floor connecting plate; the outer side of the first side wall faces away from the first mounting area, and the outer side of the third side wall faces away from the first mounting area; and the floor connecting plate is not higher than the first mounting area.

[0016] According to the vehicle chassis provided by the application, one or more of the first and second cross beams comprises a plurality of cavities arranged in a vertical direction.

[0017] According to the vehicle chassis provided by the application, a first hole is provided in the first side wall of the second beam segment, a second hole is provided in the second side wall of the second beam segment, the first and second side walls are oppositely arranged, the first and second holes communicate through the cavities, and adjacent cavities communicate.

[0018] According to the vehicle chassis provided in the application, one or more walls of the first cross beam and the second cross beam are provided with a drain hole.

[0019] According to the vehicle chassis provided in the application, one or more walls of the first cross beam and the second cross beam are provided with a drain hole.

[0020] The application further provides a railway vehicle comprising the vehicle chassis according to any one of the above.

[0021] The vehicle chassis provided in the application comprises a side beam, a first cross beam and a second cross beam, the top of the first cross beam and the second cross beam forms a first mounting area for mounting a light-transmitting member, the bottom of the first cross beam and the second cross beam forms a second mounting area for mounting a light-emitting member, the first cross beam cooperates with the second cross beam to make the vehicle chassis have a double function of mounting the light-transmitting member and the light-emitting member, the structure is simple and has less influence on other structures of the vehicle chassis, which helps to control the production manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0023] Fig. 1 is a top view structural schematic diagram of the vehicle chassis provided in the application;

[0024] Fig. 2 is a partial enlarged structural schematic diagram of the A part in Fig. 1;

[0025] Fig. 3 is a bottom view structural schematic diagram of the vehicle chassis provided in the application;

[0026] Fig. 4 is a partial enlarged structural schematic diagram of the B part in Fig. 3;

[0027] Fig. 5 is a side view structural schematic diagram of the first cross beam of the vehicle chassis provided in the application;

[0028] Fig. 6 is a side view structural schematic diagram of the first cross beam of the vehicle chassis provided in the application;

[0029] Fig. 7 is a partial structural schematic diagram of the connection state of the first cross beam and the floor of the vehicle chassis provided in the application.

[0030] 100, side beam; 200, first cross beam; 210, first beam segment; 220, second beam segment; 230, first side wall; 231, first hole; 232, auxiliary plate; 240, second side wall; 241, second hole; 250, first channel; 260, first connecting wall; 261, wire port; 270, floor connecting plate; 280, secondary floor connecting plate; 290, cavity; 2010, drain hole; 300, second cross beam; 310, third side wall; 320, fourth side wall; 330, second channel; 400, first mounting area; 500, second mounting area; 610, first arc-shaped plate; 620, second arc-shaped plate; 630, first connecting plate; 640, second connecting plate; 650, mounting opening; 700, floor. DETAILED DESCRIPTION

[0031] For the purpose, technical solutions and advantages of the present application to be clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0032] The vehicle chassis of the present application will be described below in conjunction with FIGS. 1-7, including side beams 100, a first cross beam 200 and a second cross beam 300.

[0033] The first cross beam 200 is connected between two oppositely arranged side beams 100, and the second cross beam 300 is connected between two oppositely arranged first cross beams 200. The two oppositely arranged side beams 100 can be parallel to each other or form an included angle, and the positional relationship of the two side beams 100 is not limited. As shown in FIGS. 1 and 3, the two side beams 100 are parallel to each other. The two oppositely arranged first cross beams 200 can be parallel to each other or form an included angle, and the positional relationship of the two first cross beams 200 is not limited. As shown in FIGS. 1 and 3, the two first cross beams 200 are parallel to each other. Among them, the side beams 100, the first cross beams 200 and the second cross beams 300 can be understood as extending along the horizontal direction, and the height direction of the side beams 100, the first cross beams 200 and the second cross beams 300 can be understood as the vertical direction, that is, the up-down direction of the vehicle chassis in use is the vertical direction.

[0034] The first cross beam 200 comprises a first beam segment 210 and a second beam segment 220 at at least one end of the first beam segment 210, and the first beam segment 210 is located between two opposite second cross beams 300. The first beam segment 210 is used in cooperation with the second cross beam 300 to mount a light-transmitting piece, a light-emitting piece (not shown in the figure), etc. The second beam segment 220 can be used to mount a floor 700, for example, at least one of the second cross beam 300 and the side beam 100 cooperates with the second beam segment 220 to mount at least one of the floor 700 and a sub-floor (not shown in the figure).

[0035] Referring to FIGS. 1 and 2, the top of the first beam segment 210 and the top of the second cross beam 300 enclose a first mounting area 400 for mounting a light-transmitting piece, and referring to FIGS. 3 and 4, the bottom of the first beam segment 210 and the bottom of the second cross beam 300 enclose a second mounting area 500 for mounting a light-emitting piece. The first cross beam 200 cooperates with the second cross beam 300 to have a top with the first mounting area 400 for mounting a light-transmitting piece and a bottom with the second mounting area 500 for mounting a light-emitting piece. The two cross beams cooperate to make the vehicle chassis have a dual function of mounting a light-transmitting piece and a light-emitting piece, have a simple structure and less impact on other structures of the vehicle chassis, and help to control the production manufacturing cost.

[0036] In some cases, the top surface of the first beam segment 210 and the top surface of the second cross beam 300 form the first mounting area 400, the first mounting area 400 is an area formed by splicing a plurality of top surfaces, and the first beam segment 210 and the second cross beam 300 serve to support the light-transmitting piece.

[0037] The vehicle chassis of the embodiment of the present application is suitable for the chassis structure of a suspended vehicle and can be used in a sightseeing vehicle. On the premise of meeting the structural strength of the vehicle body, through the ingenious structural design of the cross beam, the first mounting area 400 of the light-transmitting piece and the second mounting area 500 of the light-emitting piece are integrated while ensuring the aesthetic appearance of the vehicle. Through the first cross beam 200 and the second cross beam 300, the mounting functions of the light-transmitting piece and the light-emitting piece are integrated, the structures of other components of the vehicle chassis are simplified, the weight of the vehicle body chassis is reduced, and the goal of lightening the track vehicle is achieved.

[0038] The light-transmitting piece can be understood as a component formed of a light-transmitting material such as glass or resin. The light-emitting piece can be understood as a lamp piece such as a lamp strip or a lamp tube. The light-emitting piece can be a vehicle exterior decorative lamp strip.

[0039] Referring to FIGS. 1 and 3, two opposite first beam segments 210 and two opposite second cross beams 300 enclose a mounting space, which can be a quadrilateral space. The two ends of the first beam segment 210 are connected with the second beam segment 220.

[0040] In some embodiments, referring to FIGS. 4 and 5, the first cross beam 200 includes oppositely arranged first and second side walls 230 and 240, and a first channel 250 with a bottom opening is formed between the first and second side walls 230 and 240 of the first beam segment 210, so that the light emitting member can enter the first channel 250 through the opening of the first channel 250 to realize the installation of the light emitting member and the first beam segment 210. The first and second side walls 230 and 240 can be understood as side walls extending in the vertical direction. The first side wall 230 faces away from the installation space, and the second side wall 240 faces toward the installation space.

[0041] The second cross beam 300 includes oppositely arranged third and fourth side walls 310 and 320, and a second channel 330 with a bottom opening is formed between the third and fourth side walls 310 and 320, so that the light emitting member can enter the second channel 330 through the opening of the second channel 330 to realize the installation of the light emitting member and the second cross beam 300. The third side wall 310 faces away from the installation space, and the fourth side wall 320 faces toward the installation space.

[0042] Based on the positional relationship between the first cross beam 200 and the second cross beam 300, the first channel 250 and the second channel 330 have an included angle, and the first channel 250 and the second channel 330 are communicated, so that the light emitting member can be installed with the first cross beam 200 and the second cross beam 300.

[0043] Referring to FIGS. 3 and 4, the first side wall 230 and the third side wall 310 are connected by a first arc-shaped plate 610, and the second side wall 240 and the fourth side wall 320 are connected by a second arc-shaped plate 620, so that an arc-shaped corner is formed between the first cross beam 200 and the second cross beam 300 to adapt to the light emitting member with an arc-shaped corner, such as a U-shaped light emitting member.

[0044] The first arc-shaped plate 610 and the second arc-shaped plate 620 have a spacing to form an installation opening 650, so that the light emitting member can enter the first channel 250 and the second channel 330 through the installation opening 650, and the installation of the light emitting member is simple.

[0045] The structure of the first cross beam 200 and the second cross beam 300 is optimized, the first arc-shaped plate 610 and the second arc-shaped plate 620 are arranged, so that the second installation area 500 for the light emitting member forms a “U”-shaped groove, which not only ensures the beautiful appearance, but also is used for installing the “U”-shaped light emitting member, and the overall transition is smooth and the appearance is beautiful.

[0046] In some embodiments, the first arc-shaped plate 610, the first beam segment 210 and the second cross beam 300 have a first gap (not labeled in the figure), and a first connecting plate 630 is connected between the first arc-shaped plate 610, the first beam segment 210 and the second cross beam 300, which closes the first gap, avoids the gap of the vehicle chassis, and makes the vehicle chassis more integral.

[0047] The second arc-shaped plate 620, the first beam segment 210, and the second cross beam 300 have a second gap (not labeled in the figure), and the second arc-shaped plate 620, the first beam segment 210, and the second cross beam 300 are connected with a second connecting plate 640, which closes the second gap, avoids the gap in the vehicle chassis, and makes the vehicle chassis more integral.

[0048] In some embodiments, the first side wall 230 and the second side wall 240 are connected by a first connecting wall 260, which can be understood as extending in the horizontal direction. The third side wall 310 and the fourth side wall 320 are connected by a second connecting wall, which can be understood as extending in the horizontal direction. One or more of the first connecting wall 260 and the second connecting wall are provided with a wire port 261, which communicates one or more of the first channel 250 and the second channel 330. By providing the wire port 261, at least one of the first cross beam 200 and the second cross beam 300 has the function of wire routing of the light-emitting piece. The first beam segment 210 and the second cross beam 300 each have a cavity 290, and the wire port 261 communicates the cavity 290 with the first channel 250, or the wire port 261 communicates the cavity 290 with the second channel 330. The light-emitting piece can be powered through the wire port 261. The first connecting wall 260, the first side wall 230, and the second side wall 240 are integrally formed. The second connecting wall, the third side wall 310, and the fourth side wall 320 are integrally formed.

[0049] Referring to FIG. 3, the first beam segment 210 is provided with a wire port 261, which communicates the cavity 290 of the first beam segment 210 with the first channel 250. The first channel 250 is in communication with the second channel 330, and the connection between the first channel 250 and the second channel 330 is arc-shaped.

[0050] In some embodiments, the outer side of the first side wall 230 of the first cross beam 200 is connected with a floor connecting plate 270 and / or a sub-floor connecting plate 280, the outer side of the first side wall 230 faces away from the first mounting area 400, and the floor connecting plate 270 is not higher than the first mounting area 400. The first cross beam 200 has the function of mounting the floor 700 and the sub-floor. The floor connecting plate 270 is close to the top of the first side wall 230, and the sub-floor connecting plate 280 is close to the bottom of the first side wall 230. The floor connecting plate 270 and the sub-floor connecting plate 280 are integrally formed with the first side wall 230 of the first cross beam 200. In some cases, the second side wall 240 of the second beam segment 220 of the first cross beam 200 is also formed with a floor connecting plate 270 and a sub-floor connecting plate 280. The second side wall 240 of the first beam segment 210 of the first cross beam 200 is not provided with a floor connecting plate and a sub-floor connecting plate, so as to avoid affecting the light transmission.

[0051] Referring to FIG. 5, the top of the first side wall 230 is connected with an auxiliary plate 232, which serves to assist in supporting the floor 700. The auxiliary plate 232 cooperates with the floor connecting plate 270 to improve the mounting stability of the floor 700.

[0052] In some embodiments, the outer side of the third side wall 310 of the second cross beam 300 is connected with a floor connecting plate and / or a sub-floor connecting plate, the outer side of the third side wall 310 faces away from the first mounting area 400, and the floor connecting plate is not higher than the first mounting area 400. The second cross beam 300 has the functions of mounting the floor and the sub-floor, and the floor connecting plate and / or the sub-floor connecting plate are integrally formed with the third side wall 310 of the second cross beam 300. The floor connecting plate 270 is close to the top of the third side wall 310, and the sub-floor connecting plate 280 is close to the bottom of the third side wall 310. The second cross beam 300 is not shown in the drawings, and the structure of the second cross beam 300 can be referred to the first beam segment 210 of the first cross beam 200.

[0053] When the first cross beam 200 or the second cross beam 300 has both the floor connecting plate 270 and the sub-floor connecting plate 280, the installation of the sub-floor can be simplified without changing the structure of the floor to achieve the installation of the sub-floor.

[0054] Referring to FIGS. 5 and 7, based on the thickness of the floor being less than or equal to the thickness of the light-transmitting member, the floor connecting plate 270 is not higher than the first mounting area 400, which can ensure that the floor 700 is coplanar with the top of the light-transmitting member, so that the overall strength of the vehicle chassis is stronger.

[0055] Referring to FIG. 6, the second side wall 240 of the first cross beam 200 is provided with a mounting opening 242, and the second cross beam 300 is connected with the side wall of the mounting opening 242, which facilitates the positioning and installation of the second cross beam 300.

[0056] In some embodiments, referring to FIGS. 5 and 6, one or more of the first cross beam 200 and the second cross beam 300 has a plurality of cavities 290 arranged in the vertical direction, which ensures the height dimension of the first cross beam 200 and the second cross beam 300, and also reduces the weight of the first cross beam 200 and the second cross beam 300.

[0057] In some embodiments, the first side wall 230 of the second beam segment 220 is provided with a first hole 231, and the second side wall 240 of the second beam segment 220 is provided with a second hole 241, the first hole 231 and the second hole 241 are communicated through the cavities 290, and adjacent cavities 290 are communicated, which can reduce the weight of the second beam segment 220, and also can cooperate with the function of wiring (such as the power supply line of the light-emitting member) and the function of drainage.

[0058] In some embodiments, referring to FIG. 5, one or more walls of the first cross beam 200 and the second cross beam 300 are provided with a drainage hole 2010, which can avoid water accumulation in the first cross beam 200 or the second cross beam 300, and help reduce the weight, and ensure the structural strength and stability of the first cross beam 200 and the second cross beam 300.

[0059] In some embodiments, one or more of the first cross beam 200 and the second cross beam 300 has a plurality of cavities 290 arranged in a vertical direction, and adjacent cavities 290 are communicated through the drainage hole 2010. At least one drainage hole 2010 is communicated with the external environment to drain the water accumulated in the first cross beam 200 or the second cross beam 300. The drainage hole 2010 cooperates with the cavity 290 to form a drainage channel, and each cavity 290 is provided with a drainage hole 2010 as much as possible to avoid water accumulation in any cavity 290.

[0060] In some embodiments, the first beam segment 210 of the first cross beam 200 has the same structure as the second cross beam 300, and the first beam segment 210 and the second cross beam 300 cooperatively have the functions of installing the light-transmitting member, the light-emitting member, the floor and the sub-floor. The second beam segment 220 of the first cross beam 200 has the functions of installing the floor and the sub-floor, and is connected with the side beam 100 through the end portion of the second beam segment 220. The first beam segment 210 and the second beam segment 220 can be integrally formed, or can be fixedly connected through welding, bonding or the like, and the connection mode of the first beam segment 210 and the second beam segment 220 is not limited. The connection mode of the first cross beam 200 and the second cross beam 300 can be welding, bonding or the like, and is not limited.

[0061] In a suspended rail vehicle (such as a suspended monorail vehicle), the visual effect of the vehicle can be maximally improved. The vehicle bottom frame is provided with an external decorative light strip and a sightseeing glass, and a sub-floor is arranged below the bottom frame to improve the aesthetic effect of the exposed surface of the bottom frame. The vehicle bottom frame not only meets the 360° sightseeing requirement through the sightseeing glass, but also meets the bearing structural strength requirement through the compatibility of the installation of the sightseeing glass and the installation of the floor by the first cross beam 200 and the second cross beam 300.

[0062] The first cross beam 200 and the second cross beam 300 are both vehicle body profiles with multiple interfaces. Under the premise of meeting the structural strength requirement of the vehicle body, the first cross beam 200 and the second cross beam 300 integrate the installation of the external decorative light strip, the installation of the sightseeing glass, the installation of the bottom frame floor and the installation of the sub-floor below the vehicle, perfectly solve the problems of multiple interface compatibility and structural strength, and also take into account the aesthetic requirement of the vehicle appearance, which helps to reduce the number of parts with installation functions, reduce the weight of the vehicle bottom frame, and achieve the goal of vehicle light weight.

[0063] Another aspect of the embodiments of the present application also provides a rail vehicle comprising the vehicle bottom frame according to any one of the above.

[0064] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some of the technical features can be replaced by equivalent features. Such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle chassis, comprising: a side beam (100) ; a first cross beam (200) connected between two oppositely arranged side beams (100), the first cross beam (200) comprising a first beam segment (210) and a second beam segment (220) located at at least one end of the first beam segment (210) ; a second cross beam (300) connected between two oppositely arranged first cross beams (200), the first beam segment (210) being located between two opposite second cross beams (300) ; a top of the first beam segment (210) and a top of the second cross beam (300) forming a first mounting area (400) for mounting a light-transmitting member, a bottom of the first beam segment (210) and a bottom of the second cross beam (300) forming a second mounting area (500) for mounting a light-emitting member.

2. The vehicle undercarriage of claim 1, wherein, the first cross beam (200) comprising a first side wall (230) and a second side wall (240) arranged oppositely, a first channel (250) with an open bottom being formed between the first side wall (230) and the second side wall (240) of the first beam segment (210), the second cross beam (300) comprising a third side wall (310) and a fourth side wall (320) arranged oppositely, a second channel (330) with an open bottom being formed between the third side wall (310) and the fourth side wall (320), the first channel (250) and the second channel (330) being in communication, the first side wall (230) and the third side wall (310) being connected by a first arc-shaped plate (610), the second side wall (240) and the fourth side wall (320) being connected by a second arc-shaped plate (620), the first arc-shaped plate (610) and the second arc-shaped plate (620) having a spacing therebetween to form a mounting opening (650).

3. The vehicle undercarriage of claim 2, wherein, the first arc-shaped plate (610), the first beam segment (210) and the second cross beam (300) having a first gap therebetween, a first connecting plate (630) being connected between the first arc-shaped plate (610), the first beam segment (210) and the second cross beam (300), the first connecting plate (630) closing the first gap; the second arc-shaped plate (620), the first beam segment (210) and the second cross beam (300) having a second gap therebetween, a second connecting plate (640) being connected between the second arc-shaped plate (620), the first beam segment (210) and the second cross beam (300), the second connecting plate (640) closing the second gap.

4. The vehicle underframe of claim 2 or 3, wherein, the first side wall (230) and the second side wall (240) being connected by a first connecting wall (260), the third side wall (310) and the fourth side wall (320) being connected by a second connecting wall, one or more of the first connecting wall (260) and the second connecting wall being provided with a wiring port (261), the wiring port (261) being in communication with one or more of the first channel (250) and the second channel (330).

5. The vehicle underframe of any one of claims 2 to 4, wherein, An outer side of the first side wall (230) of the first cross beam (200) and an outer side of the third side wall (310) of the second cross beam (300) are connected with one or more of a floor connecting plate (270) and / or a sub-floor connecting plate (280), the outer side of the first side wall (230) facing away from the first mounting area (400), the outer side of the third side wall (310) facing away from the first mounting area (400), the floor connecting plate (270) not being higher than the first mounting area (400).

6. The vehicle undercarriage of any one of claims 1-5, wherein, One or more of the first cross beam (200) and the second cross beam (300) have a plurality of cavities (290) arranged in a vertical direction.

7. The vehicle undercarriage of claim 6, wherein, A first side wall (230) of the second beam segment (220) is provided with a first hole (231), a second side wall (240) of the second beam segment (220) is provided with a second hole (241), the first side wall (230) and the second side wall (240) are oppositely arranged, the first hole (231) and the second hole (241) are communicated through the cavities (290), adjacent cavities (290) are communicated.

8. The vehicle undercarriage of any one of claims 1-7, wherein, One or more walls of the first cross beam (200) and the second cross beam (300) are provided with a drain hole (2010).

9. The vehicle undercarriage of claim 8, wherein, When one or more of the first cross beam (200) and the second cross beam (300) have a plurality of cavities (290) arranged in a vertical direction, adjacent cavities (290) are communicated through the drain hole (2010).

10. A rail vehicle comprising the vehicle underframe according to any one of claims 1 to 9.

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