Passenger compartment staircase, car body and rail vehicle

Abstract

An embodiment of the present application provides a passenger compartment staircase, a car body, and a rail vehicle. The passenger compartment staircase includes staircase vertical plates, staircase flat plates, and staircase side plates. The staircase vertical plates and the staircase flat plates are alternately connected to form a stepped structure, and at least one staircase vertical plate and its adjacent staircase flat plate are integrally formed; the uppermost end of the stepped structure is an upper staircase vertical plate, and the lowest step of the stepped structure includes a lower staircase flat plate and a lower staircase vertical plate. The lower staircase vertical plate is vertically arranged, and its upper end is connected to the lower staircase flat plate; the staircase side plates are arranged on both sides of the stepped structure formed by the staircase vertical plates and the staircase flat plates and are perpendicular to the staircase vertical plates and the staircase flat plates. Side plate car body connecting parts are provided on the staircase side plates. This kind of passenger compartment staircase has few structural components, is convenient and fast for pre-assembly and in-car assembly, and can be applied to various vehicle types, with wide applications.

Description

Technical Field

[0001] The present application relates to the interior decoration technology of rail vehicles, and more specifically, to a passenger compartment staircase, a car body and a rail vehicle. Background Art

[0002] For single-layer rail vehicles, stairs are usually not provided inside the vehicle; for double-layer rail vehicles, stairs are provided between the upper and lower passenger compartments.

[0003] All components of the stairs of traditional rail vehicles are loose parts, which need to be separately assembled into multiple sub-assemblies, and then each sub-assembly is installed on the car body of the rail vehicle. Among them, some sub-assemblies are assembled with the car body to play the role of the staircase support structure.

[0004] Therefore, the large number of components, complex assembly processes and long time consumption of the stairs of traditional rail vehicles are technical problems that need to be urgently solved by those skilled in the art. Summary of the Invention

[0005] In order to solve one of the above technical defects, a passenger compartment staircase, a car body and a rail vehicle are provided in an embodiment of the present application.

[0006] According to the first aspect of the embodiment of the present application, a passenger compartment staircase is provided, including:

[0007] A stepped structure, which is formed by vertically arranged staircase vertical plates and horizontally arranged staircase flat plates. The staircase vertical plates and the staircase flat plates are alternately connected to form a stepped structure, and at least one staircase vertical plate and its adjacent staircase flat plate are integrally formed structures; the uppermost end of the stepped structure is the upper staircase vertical plate, and the lowest step of the stepped structure includes a lower staircase flat plate and a lower staircase vertical plate, where the lower staircase vertical plate is vertically arranged and its upper end is connected to the lower staircase flat plate;

[0008] Staircase side plates, which are arranged on both sides of the stepped structure formed by the staircase vertical plates and the staircase flat plates and are perpendicular to the staircase vertical plates and the staircase flat plates, and side plate car body connectors are provided on the staircase side plates.

[0009] The height of the staircase side plates in the vertical direction is greater than or equal to the stepped structure of the passenger compartment staircase.

[0010] According to the second aspect of the embodiments of the present application, there is provided a vehicle body with a vertical height of the above-mentioned side plate of the stair greater than that of the passenger compartment stair step structure, including: a chassis, side walls, end walls and a roof. The side walls are vertically arranged on both sides of the chassis, the end walls are vertically arranged at both ends of the chassis, the upper ends of the side walls and the end walls are connected to the roof, and the lower ends are connected to the chassis; the chassis is composed of at least two chassis modules connected to each other longitudinally, and there is a height difference between these chassis modules. The floor laid on the chassis module with a higher setting position is a high-floor interior floor, and the floor laid on the chassis module with a lower position is a low-floor interior floor. In the transverse direction, the middle part of the high-floor interior floor is concave to form a high-floor aisle floor. The high-floor passenger floor for installing structures such as seats is located on both sides of the high-floor aisle floor. Among them, the vertical height of the high-floor aisle floor is greater than that of the low-floor interior floor but less than that of the high-floor passenger floor; the high-floor interior floor and the low-floor interior floor are connected by the above-mentioned passenger compartment stairs. The width of the passenger compartment stairs is the same as the width of the high-floor aisle floor. The top of the upper vertical board of the stairs of the passenger compartment stairs is flush with and connected to the high-floor aisle floor. The top of the side board of the stairs of the passenger compartment stairs is flush with and connected to the high-floor passenger floor. The lower end of the lower vertical board of the stairs of the passenger compartment stairs is connected to the low-floor interior floor. The passenger compartment stairs are also connected to the chassis through the side board vehicle body connector.

[0011] According to the third aspect of the embodiments of the present application, there is provided a rail vehicle, including the vehicle body with a concave high-floor aisle floor as described above.

[0012] According to the fourth aspect of the embodiments of the present application, there is provided a vehicle body with a vertical height of the above-mentioned side plate of the stair equal to that of the passenger compartment stair step structure, including: a chassis, side walls, end walls and a roof. The side walls are vertically arranged on both sides of the chassis, the end walls are vertically arranged at both ends of the chassis, the upper ends of the side walls and the end walls are connected to the roof, and the lower ends are connected to the chassis; the chassis is composed of at least two chassis modules connected to each other longitudinally, and there is a height difference between these chassis modules. The floor laid on the chassis module with a higher setting position is a high-floor interior floor, and the floor laid on the chassis module with a lower position is a low-floor interior floor. The high-floor interior floor and the low-floor interior floor 13 are connected by the above-mentioned passenger compartment stairs. The upper vertical board and the top of the side board of the stairs of the passenger compartment stairs are flush with and connected to the high-floor interior floor. The lower end of the lower vertical board of the stairs of the passenger compartment stairs is connected to the low-floor interior floor. The passenger compartment stairs are also connected to the chassis through the side board vehicle body connector.

[0013] According to the fifth aspect of the embodiments of the present application, there is provided a rail vehicle, including the vehicle body with a flat high-floor interior floor as described above.

[0014] Adopting the technical solution provided in the embodiment of the present application, there are only three main components of the entire passenger compartment staircase. Among them, the step structure is made by an integral molding method, and the other two are the staircase side plates arranged on both sides of the step structure. There are few assembled parts and few processes, and the assembly is very simple, which is conducive to high-efficiency modular production; moreover, it can be assembled under the vehicle in advance, and the subsequent on-vehicle installation is simple and fast; by changing the relative height between the staircase side plate and the step structure, it can be applied to flat floors and U-shaped floors, and the application range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the passenger compartment staircase provided by the embodiment of the present application;

[0017] Figure 2 is a side view of the passenger compartment staircase provided by the embodiment of the present application;

[0018] Figure 3 is a rear view of the passenger compartment staircase provided by the embodiment of the present application;

[0019] Figure 4 is a schematic diagram of the setting of the passenger compartment staircase applied to a U-shaped floor passenger compartment (showing part of the underframe).

[0020] REFERENCE MARKS:

[0021] 11 - high-floor passenger seat floor; 12 - high-floor aisle floor; 13 - low-floor interior floor;

[0022] 24 - underframe;

[0023] 38 - passenger compartment staircase; 381 - staircase side plate; 382 - upper staircase vertical plate; 383 - lower staircase flat plate; 384 - lower staircase vertical plate; 385 - floor cloth pressing strip; 386 - side plate vehicle body connecting piece; 387 - staircase support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the technical solutions and advantages in the embodiments of the present application clearer and more understandable, the following further details the exemplary embodiments of the present application with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0025] In this embodiment, a passenger car staircase is provided. This passenger compartment staircase can be applied to rail vehicles or non-rail vehicles.Figure 1 Schematic diagram of the passenger compartment staircase structure provided by the embodiment of the present application Figure 2 Side view of the passenger compartment staircase provided by the embodiment of the present application Figure 3 Rear view of the passenger compartment staircase provided by the embodiment of the present application Figure 4 Schematic diagram of the setting of the passenger compartment staircase applied to the U-shaped floor passenger compartment (exposing part of the underframe). In this embodiment, the vehicle length direction is called the longitudinal direction, the vehicle width direction is called the transverse direction, and the vehicle height direction is called the vertical direction, the vertical direction or the vertical direction.

[0026] The embodiment of the present application is described by taking its application on a rail vehicle as an example. The rail vehicle includes at least one carriage. The car body of the carriage is composed of an underframe 24, side walls, a roof, and end walls. The carriage floor is located above the underframe 24 or is integrally designed with the underframe 24. There is a height difference in the carriage floor or the carriage is a double-deck structure.

[0027] As Figures 1 to 4 shown, the passenger compartment staircase 38 provided by the embodiment of the present application includes: a step structure and staircase side plates symmetrically arranged on both sides of the step structure. Specifically, the step structure is formed by alternately connecting vertically arranged staircase vertical plates and horizontally arranged staircase flat plates. That is, the lower end of the upper staircase vertical plate 382 of the top layer is connected to a staircase flat plate. One end of this staircase flat plate opposite to the connection end with the upper staircase vertical plate 382 is connected to the next staircase vertical plate, and this staircase vertical plate is then connected to the next staircase vertical plate, and so on until the last layer. The angle between the staircase vertical plate and the staircase horizontal plate is about 90°. At least one staircase vertical plate and its adjacent staircase flat plate are an integrally formed structure. The staircase vertical plate and the adjacent staircase flat plate can be processed and manufactured using any material that meets the design requirements, such as metal, plastic, composite material, synthetic material, etc., and can be processed using all methods such as plastic molding, extrusion molding, 3D printing molding, etc.; the uppermost end of the step structure is the upper staircase vertical plate 382, and the lowest step of the step structure includes a lower staircase flat plate 383 and a lower staircase vertical plate 384, where the lower staircase vertical plate 384 is vertically arranged and its upper end is connected to the lower staircase flat plate 383.

[0028] The staircase side plates 381 are arranged on both sides of the step structure formed by the staircase vertical plates and the staircase flat plates and are perpendicular to both the staircase vertical plates and the staircase flat plates at the same time. The staircase side plates 381 are provided with side plate vehicle body connectors 386. The staircase side plates 381 can be connected to the step structure by welding or other means. If 3D printing technology is used, they can also be integrally formed, further reducing the number of components and improving the integrity of the passenger compartment staircase 38.

[0029] Integrally forming at least a pair of stair risers and stair treads can reduce the original at least two components to one piece, and there will be no need for an assembly process at their connection. If the entire stair structure is integrally formed, a large number of components and assembly processes will be reduced, significantly improving the assembly efficiency. The stair side plates can provide support and reinforcement for the stair structure. Since the industrialization of integral forming technologies such as 3D printing is not yet mature, in the embodiments of this application, a pre-assembly method is adopted in which the stair side plates and the stair structure are processed separately and then fixedly connected by welding, which is currently the optimal solution that can balance cost and efficiency. After the stair side plates 381 and the stair structure are assembled, they can be fixedly connected to the vehicle body through the side plate vehicle body connectors 386 on the stair side plates 381. The vehicle body assembly is very fast and convenient, with few processes and high reliability.

[0030] To clearly illustrate the structure of the embodiments of this application, an Figures 1-4 A passenger compartment stair applicable to vehicle interior floors with different heights is used for representation. There is a height difference in this vehicle interior floor. However, due to practical application limitations, this height difference is not very large, and the number of required steps is small. Therefore, an Figures 1-4 The passenger compartment stair shown has only one layer of stair structure, that is, its stair structure is sequentially connected by a stair upper riser 382, a stair lower flat plate 383, and a stair lower riser 384. Among them, the stair upper riser 382 and the stair lower flat plate 383 are bent from stainless steel plates. Except on the stair side plates 381, connection connectors for connecting the high-floor interior floor and the low-floor interior floor 13 are respectively provided at the upper end of the stair upper riser 382 and the lower end of the stair lower flat plate 383.

[0031] In some embodiments, especially in the case of more steps, a reinforcing beam is provided at the bending part of the stair structure. The reinforcing beam is used to increase the strength of the stair tread and improve the reliability of the passenger compartment stair 38. The reinforcing beam can be integrally formed with the stair structure or assembled during the pre-assembly process.

[0032] Furthermore, a side plate edge beam is provided at the top of the stair side plate 381, and the side plate edge beam is formed by bending the top of the side plate outward relative to the stair structure of the passenger compartment stair. Specifically, here, inward refers to the direction towards the longitudinal mid-section of the stair structure, and the outward direction is opposite to the inward direction. The same applies to the following descriptions of the embodiments of this application and will not be repeated. Generally, the angle between the side plate edge beam and the main body of the stair side plate 381 is about 90°, and the specific angle can be determined according to the setting angle of the vehicle floor it needs to cooperate with, which is not limited in this application.

[0033] Further, connection structures for the vehicle floor are provided on the side panel side beams. These connection structures can be various forms of holes, grooves, buckles, bonding points, etc. commonly used in the art for connection, and are not particularly limited.

[0034] In some embodiments, a specific implementation of the staircase side panel 381 is provided. The staircase side panel 381 includes a longitudinally arranged side panel longitudinal facade and a transversely arranged side panel transverse facade. Taking the plane parallel to the staircase flat plate as the horizontal section, the structure of the staircase side panel in this section is "L"-shaped; two staircase side panels 381 are symmetrically arranged back to back at both ends of the stepped structure with the central axis perpendicular to the staircase flat plate as the axis, that is, the side panel transverse facade constituting the bottom edge of the "L" shape extends outward.

[0035] Further, the side panel transverse facade is formed by bending the side panel longitudinal facade outward at the middle position of the side of the lower staircase flat plate. In this specific embodiment, the "middle position of the side of the lower staircase flat plate" does not refer to the exact middle position of the side of the lower staircase flat plate, but any suitable position between the two ends of the side of the lower staircase flat plate, which can be the exact middle, or close to the end where the lower staircase flat plate is connected to the upper staircase vertical plate, or close to the end where the lower staircase flat plate is connected to the lower staircase vertical plate. The specific position is determined according to the design requirements.

[0036] This design allows the lowest step part composed of the lower staircase flat plate 383 and the lower staircase vertical plate 384 to extend out of the aisle-like space formed by the two staircase side panels 381. Firstly, it increases the aesthetics. Secondly, it increases the width of the lowest step, improves stability, and facilitates passengers to board the vehicle. Thirdly, a rounded corner transition structure can be designed at the corner of the last step to increase safety.

[0037] Further, this specific embodiment also provides a specific implementation of the lower staircase vertical plate 383: The lower staircase vertical plate 383 includes a longitudinally arranged lower vertical plate longitudinal facade and a transversely arranged lower vertical plate transverse facade. The two lower vertical plate longitudinal facades and the lower vertical plate transverse facade enclose a "U"-shaped lower staircase vertical plate. The tops of the two lower vertical plate longitudinal facades are in contact with the side panel transverse facade, and the remaining "U" shape of the lower staircase vertical plate matches the contour of the lower staircase flat plate.

[0038] In this specific embodiment, the separate setting of the lower staircase vertical plate 383 is designed to cooperate with the lower staircase flat plate 383 that partially extends out of the aisle-like space formed by the two staircase side panels 381. The upper end of the lower staircase vertical plate can be bent inward and connected to the lower staircase flat plate 383 to increase the width of the lowest step, and a rounded corner transition structure is designed at the corner.

[0039] Further, a staircase support 387 is provided on the inner surface where the longitudinal vertical surface and the transverse vertical surface of the lower staircase vertical plates are connected. By arranging the staircase support 387 between the lower staircase flat plate of the bottom step and the inner floor of the low floor, the overall stiffness of the passenger compartment staircase can be increased, ensuring its load-bearing capacity.

[0040] Further, in some specific embodiments, a floor cloth is provided on the upper surface of the stepped structure. The floor cloth can be laid separately or extended from the floor cloth already installed in the high floor inner floor area or the low floor inner floor area to the surface of the stepped structure. The main functions of the floor cloth are to enhance aesthetics, anti-slip, and moisture-proof, improving the riding experience of passengers.

[0041] Further, on the upper surface of the lower staircase flat plate, a floor cloth bead 385 is provided along the edge where the lower staircase flat plate is connected to the lower staircase vertical plate, and a floor cloth bead 385 is also provided at the top of the upper staircase vertical plate. The floor cloth bead 385 is used to fix the floor cloth, making it not easy to wrinkle and shift. The floor cloth bead 385 can be inlaid or directly made of a material with a prominent color or reflective in the dark (similar to the reflective effect of a traffic police safety vest) to increase its reminder function and enhance its safety.

[0042] In some embodiments, the height of the staircase side plate 381 in the vertical direction is greater than that of the stepped structure of the passenger compartment staircase, that is, the upper end of the staircase side plate 381 is higher than the upper end of the upper staircase vertical plate 382. This structure is applicable to a vehicle body with a "U"-shaped cross-section of the high floor inner floor.

[0043] The embodiment of the present application provides a vehicle body that can apply the passenger compartment staircase 38 where the upper end of the staircase side plate 381 is higher than the upper end of the upper staircase vertical plate 382. As Figure 1As shown in the figure, such a car body includes: a chassis 24, side walls, end walls and a roof. The side walls are vertically arranged on both sides of the chassis 24, and the end walls are vertically arranged at both ends of the chassis 24. The upper ends of the side walls and the end walls are connected to the roof, and the lower ends are connected to the chassis 24. The chassis 24 is composed of at least two chassis 24 modules connected to each other longitudinally, and there is a height difference between these chassis 24 modules. The floor laid on the chassis 24 module with a higher setting position is a high-floor interior floor, and the floor laid on the chassis 24 module with a lower position is a low-floor interior floor 13. In the transverse direction, the middle part of the high-floor interior floor is recessed to form a high-floor aisle floor 12. The high-floor passenger floor 11 for installing structures such as seats is located on both sides of the high-floor aisle floor 12. Therefore, the transverse cross-section of the high-floor interior floor is "U" shaped. Among them, the setting height of the high-floor aisle floor 12 in the vertical direction is greater than that of the low-floor interior floor 13 but less than that of the high-floor passenger floor 11. The high-floor interior floor is connected to the low-floor interior floor 13 through the passenger compartment stairs 38 as described above. The width of the passenger compartment stairs 38 is the same as the width of the high-floor aisle floor 12. The top of the upper vertical board 382 of the passenger compartment stairs is flush with and connected to the high-floor aisle floor 12. The top of the side board 381 of the passenger compartment stairs is flush with and connected to the high-floor passenger floor 11. The lower end of the lower vertical board 384 of the passenger compartment stairs is connected to the low-floor interior floor. The passenger compartment stairs are also connected to the chassis 24 through the side board car body connecting piece 386.

[0044] In addition, the embodiment of the present application also provides a rail vehicle, which includes the car body with the transverse cross-section of the high-floor interior floor being "U" shaped as described above.

[0045] In some other embodiments, the height of the side board 381 of the stairs in the vertical direction is equal to the stepped structure of the passenger compartment stairs, that is, the upper end of the side board 381 is flush with the upper end of the upper vertical board 382 of the stairs. This structure is applicable to the car body with the cross-section of the high-floor interior floor being "one" shaped.

[0046] An embodiment of the present application provides a vehicle body, and a passenger compartment staircase 38 can be applied, where the upper end of the staircase side plate 381 of the staircase is flush with the upper end of the upper vertical plate 382 of the staircase. Such a vehicle body includes: a chassis 24, side walls, end walls, and a roof. The side walls are vertically arranged on both sides of the chassis 24, the end walls are vertically arranged at both ends of the chassis 24, the upper ends of the side walls and the end walls are connected to the roof, and the lower ends are connected to the chassis 24; the chassis 24 is composed of at least two chassis 24 modules connected to each other longitudinally, and there is a height difference between these chassis 24 modules. The floor laid on the chassis 24 module with a higher setting position is a high-floor interior floor, and the floor laid on the chassis 24 module with a lower position is a low-floor interior floor 13. The transverse cross-section of the high-floor interior floor is in the shape of a "one". The high-floor interior floor is connected to the low-floor interior floor 13 through the above-mentioned passenger compartment staircase 38. The top ends of the upper vertical plate 382 and the staircase side plate 381 of the passenger compartment staircase 28 are flush with and connected to the high-floor interior floor. The lower end of the lower vertical plate 384 of the passenger compartment staircase 38 is connected to the low-floor interior floor 13. The passenger compartment staircase 38 is also connected to the chassis 24 through the side plate vehicle body connecting piece 386.

[0047] An embodiment of the present application also provides a rail vehicle, which includes: the vehicle body with the transverse cross-section of the above-mentioned high-floor interior floor in the shape of a "one".

[0048] The vehicle body and the rail vehicle provided by the embodiments of the present application have the same technical effects as the passenger compartment staircase they apply.

[0049] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0051] In this application, unless otherwise clearly defined and limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a connection that allows for mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] Although the preferred embodiments of this application have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of this application.

[0053] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

1. A vehicle body, characterized in that, Comprising: A chassis; the chassis is composed of at least two chassis modules connected longitudinally to each other, and there is a height difference between these chassis modules. The floor laid on the chassis module with a higher setting position is a high-floor interior floor, and the floor laid on the chassis module with a lower position is a low-floor interior floor; In the transverse direction, the middle part of the high-floor interior floor is recessed to form a high-floor aisle floor; wherein, the setting height of the high-floor aisle floor in the vertical direction is greater than that of the low-floor interior floor but less than that of the high-floor passenger seat floor; the high-floor interior floor and the low-floor interior floor are connected by a passenger compartment staircase; The passenger compartment staircase includes: A stepped structure, which includes vertically arranged staircase vertical plates and horizontally arranged staircase flat plates. The staircase vertical plates and the staircase flat plates are alternately connected to form a stepped structure, and at least one staircase vertical plate and its adjacent staircase flat plate are integrally formed; the uppermost end of the stepped structure is the upper staircase vertical plate, and the lowest step of the stepped structure includes a lower staircase flat plate and a lower staircase vertical plate. The lower staircase vertical plate is vertically arranged, and its upper end is connected to the lower staircase flat plate; Staircase side plates, which are arranged on both sides of the stepped structure formed by the staircase vertical plates and the staircase flat plates and are perpendicular to the staircase vertical plates and the staircase flat plates. Side plate body connectors are provided on the staircase side plates; the staircase side plates include a longitudinally arranged side plate longitudinal facade and a transversely arranged side plate transverse facade. Taking the plane parallel to the staircase flat plate as a horizontal section, the structure of the staircase side plates in this section is an "L" shape; the two staircase side plates are symmetrically arranged back to back at both ends of the stepped structure with the central axis perpendicular to the staircase flat plate as the axis; The width of the passenger compartment staircase is the same as that of the high-floor aisle floor. The top end of the upper staircase vertical plate of the passenger compartment staircase is flush with and connected to the high-floor aisle floor. The top of the staircase side plates of the passenger compartment staircase is flush with and connected to the high-floor passenger seat floor. The lower end of the lower staircase vertical plate of the passenger compartment staircase is connected to the low-floor interior floor. The passenger compartment staircase is also connected to the chassis through the side plate body connectors.

2. The vehicle body according to claim 1, wherein: A reinforcing beam is provided at the bending part of the stepped structure.

3. The vehicle body according to claim 2, characterized in that: A side plate edge beam is provided at the top of the staircase side plates. The side plate edge beam is formed by the top of the staircase side plates bending outward relative to the stepped structure of the passenger compartment staircase; a connecting structure for connecting the floor is provided on the side plate edge beam.

4. The vehicle body according to claim 1, wherein: The side plate transverse facade is formed by the side plate longitudinal facade bending outward at the middle position of the side of the lower staircase flat plate.

5. The vehicle body according to claim 1, characterized in that: The lower staircase vertical plate includes a longitudinally arranged lower vertical plate longitudinal facade and a transversely arranged lower vertical plate transverse facade. The two lower vertical plate longitudinal facades and the lower vertical plate transverse facade enclose a "U"-shaped lower staircase vertical plate. The top ends of the two lower vertical plate longitudinal facades are in contact with the side plate transverse facade, and the remaining "U" shape of the lower staircase vertical plate matches the contour of the lower staircase flat plate.

6. The vehicle body according to claim 5, characterized in that: Staircase brackets are provided on the inner surface of the connection part between the two lower vertical plate longitudinal facades and the lower vertical plate transverse facade.

7. The vehicle body according to claim 1, wherein: A floor cloth is provided on the upper surface of the stepped structure.

8. The vehicle body according to claim 7, characterized in that: On the upper surface of the lower flat plate of the staircase, a floor cloth pressing strip is provided along the edge where the lower flat plate of the staircase is connected to the lower vertical plate of the staircase, and a floor cloth pressing strip is also provided at the top of the upper vertical plate of the staircase.

9. The vehicle body according to claim 1, characterized in that, The high-floor passenger seats for installing the seat structure are located on both sides of the high-floor aisle floor.

10. An orbital vehicle, characterized in that, Comprising: The vehicle body according to any one of claims 1-9.

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