CN114194234A

CN114194234A - Roof, automobile body and rail vehicle

Info

Publication number: CN114194234A
Application number: CN202111470515.4A
Authority: CN
Inventors: 惠美玲; 郝振杰; 沈体强; 王力; 张锦华; 付一娜; 侯建英; 张京; 姚铖; 孟永兴; 张雷; 吴胜权
Original assignee: CRRC Tangshan Co Ltd
Current assignee: CRRC Tangshan Co Ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-03-18
Anticipated expiration: 2041-12-03
Also published as: WO2023097827A1; CN114194234B

Abstract

The embodiment of the application provides a roof, a vehicle body and a railway vehicle, wherein the roof comprises a flat top assembly, and the upper surface of the flat top assembly is a plane and is parallel to the horizontal plane; the top of the middle top component is higher than the position of the flat top component; the inclined end top assembly is respectively connected with the flat top assembly and the middle top assembly. The roof, the car body and the rail car provided by the embodiment of the application can be provided with equipment at the flat top assembly of the roof, so that the space is saved, the passenger capacity is increased, the load of the underframe is reduced, and the service life is prolonged.

Description

Roof, automobile body and rail vehicle

Technical Field

The present disclosure relates to vehicle interior trim technologies, and more particularly, to a roof, and a vehicle body and a rail vehicle using the same.

Background

The rail transit is an all-weather traffic tool because of running on a special traffic lane, being not interfered by other traffic tools, not generating a line jam phenomenon and being not influenced by weather, and has the advantages of reliable punctuality, accessibility, comfort, safety, effective space utilization rate, low operating cost, low pollution and the like, thereby being widely applied to the near modern society. With diversification of application scenes, the design requirements on the rail vehicle are increased day by day, and the design of a single vehicle type with a single function is lagged behind.

In order to adapt to diversified transportation requirements, break through a single market vehicle type pattern, better adapt to the development requirements of the market, and meet the transportation capacity of high-density passenger flow in a specific interval, the research and development of double-layer vehicles are very important.

However, in the current market, the application of the double-deck vehicles is less, and most of the double-deck vehicles mainly have the functions of equipment suspension and passenger carrying by the underframe, so that the space utilization is unreasonable, the equipment arranged on the underframe occupies space, and the failure rate of the underframe is higher due to overhigh load.

Disclosure of Invention

In order to solve one of the technical defects, the embodiment of the application provides a roof, a vehicle body and a rail vehicle.

According to a first aspect of embodiments of the present application, there is provided a vehicle roof comprising:

the upper surface of the flat top assembly is a plane and is parallel to the horizontal plane;

the top of the middle top component is higher than the position of the flat top component;

the inclined end top assembly is respectively connected with the flat top assembly and the middle top assembly.

According to a second aspect of an embodiment of the present application, there is provided a vehicle body including: the side walls are vertically arranged on two sides of the bottom frame, the end walls are vertically arranged at two ends of the bottom frame, the upper ends of the side walls and the end walls are connected with the roof, and the lower ends of the side walls and the end walls are connected with the bottom frame.

According to a third aspect of embodiments of the present application, there is provided a rail vehicle comprising: the vehicle body as described above.

According to the technical scheme provided by the embodiment of the application, the sectional type car roof is adopted, the main body structure is formed by a flat top component and a middle top component which are connected by inclined end tops in the longitudinal direction, the middle top component is higher than the flat top component, the upper surface of the flat top component is a plane, equipment which is originally hung on a bottom frame of a railway vehicle can be arranged on the flat top component, the space on the bottom frame is saved, and the passenger carrying capacity or the goods carrying capacity is increased; meanwhile, the load on the underframe is reduced, and the service life of the underframe is prolonged. In addition, the middle roof assembly can be adapted and replaced according to the use requirements of different vehicles, and the utilization rate of the roof is increased.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic view of a roof structure provided in an embodiment of the present application;

FIG. 2 is a front view of FIG. 1;

fig. 3 is a schematic view (exploded view) of a roof structure provided in an embodiment of the present application;

FIG. 4 is a longitudinal cut away view of a vehicle roof provided by an embodiment of the present application;

FIG. 5 is an enlarged view of section A of FIG. 4;

FIG. 6 is a cross-sectional view of a flat top composition provided by an embodiment of the present application;

FIG. 7 is an enlarged view of section C of FIG. 4;

FIG. 8 is a cross-sectional view of a middle roof assembly provided by an embodiment of the present application;

FIG. 9 is a longitudinal cross-sectional view of a beveled tip assembly provided in accordance with an embodiment of the present application;

FIG. 10 is an enlarged view of section B of FIG. 4;

fig. 11 is a schematic structural diagram of a dual-layer chassis according to an embodiment of the present disclosure;

FIG. 12 is a schematic view of the chassis attachment accessory;

FIG. 13 is a schematic view of a lower chassis end module;

fig. 14 is a schematic structural view of a middle module of a lower chassis;

fig. 15 is a schematic structural view of the upper chassis.

Reference numerals:

22-side walls; 22 a-side window opening;

23-vehicle roof;

231-middle top composition; 2311-middle top beam; 2312-middle top transition beam; 2313-middle top and bottom beams;

232-flat top composition; 2321-flat-top centre sill; 2321 a-flat top middle beam middle section bar; 2321 b-flat-top centre sill first transition profile; 2321 c-flat top centre sill second transition profile; 2322-flat top edge beam; 2323-flat-top plugging section bar;

233-oblique end top; 2331-oblique end top section bar; 2332-oblique tip transition section; 2333-oblique end top and bottom profile; 2334-oblique end top connection plate;

2351-first type of weld; 2352-second type of weld;

246-lower chassis; 2461-lower chassis middle module; 2461 a-lower underframe middle beam; 2461 b-lower chassis edge beam; 2462-lower chassis end module; 2462 a-lower undercarriage end beams; 2462 b-lower undercarriage trailing beams; 2463 c-draft sill front end plate; 2464-lower chassis attachment; 2464 a-a first accessory connection portion; 2464 b-a second accessory connection portion;

247-upper chassis; 2471-upper chassis middle module; 2472-upper chassis end module.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the process of realizing the application, the inventor finds that in the prior art, the roof of the railway vehicle is of a structure which is integrally in an arc surface, is consistent in overall height and is formed by welding long sections, and the integrally arc surface is favorable for guiding flow and reducing resistance, but equipment cannot be mounted on the roof and has no other purposes; in the prior art, the mounting equipment of the vehicle is usually arranged on the underframe, so that the underframe is overloaded and easily damaged, and the equipment arranged on the underframe occupies a large space; in addition, the car roofs in the prior art are not universal, and the method brings convenience.

In view of the above problems, the present embodiment provides a roof, which may be applied to a rail vehicle, a trackless vehicle, or different vehicle types, and may be adapted according to needs, and may be used to install most of the devices originally installed on the underframe, thereby saving space on the underframe and increasing passenger capacity or cargo capacity, and this advantage is particularly obvious for application in a double-deck rail vehicle.

Fig. 1 is a schematic view of a roof structure provided in an embodiment of the present invention, and fig. 2 is a front view of fig. 1, and as shown in fig. 1 and 2, in the embodiment, a vehicle length direction is referred to as a longitudinal direction, a vehicle width direction is referred to as a transverse direction, a vehicle height direction is referred to as a vertical direction, a vertical direction or a vertical direction, and a horizontal plane of the earth is used as a horizontal plane.

The present embodiment is applied to a railway vehicle as an example, and the implementation of the roof is specifically described. Fig. 3 is a schematic view (exploded view) of a roof structure provided in an embodiment of the present application. As shown in fig. 1 to 3, the rail vehicle includes a vehicle body, and the vehicle body includes an underframe, side walls 22, end walls, and a roof 23 provided in this embodiment, wherein the side walls 22 are vertically disposed at two sides of the underframe, the end walls are vertically disposed at two ends of the underframe, upper ends of the side walls 22 and the end walls are connected to the roof 23, and lower ends thereof are connected to the underframe.

Fig. 4 is a longitudinal cut view of a roof provided in an embodiment of the present application. The roof 23 shown in fig. 1 to 4 includes: a flat top assembly 232, a middle top assembly 231 and an inclined end top assembly 233, wherein the upper surface of the flat top assembly 232 is a plane and is parallel to the horizontal plane; the top of the middle top composition 231 is higher than the position of the flat top composition 232; the inclined end top assembly 233 is respectively connected with the flat top assembly 232 and the middle top assembly 231, i.e. the flat top assembly 232 is connected with the middle top assembly 231 through the inclined end top assembly 233. In the present embodiment, each roof includes a middle roof assembly 231 disposed in the middle of the roof, two flat roof assemblies 232 disposed at two ends of the middle roof assembly 231 in the longitudinal direction of the roof, and two inclined end roof assemblies 233 fixedly connecting the two flat roof assemblies 232 and the middle roof assembly 231 together.

According to the technical scheme provided by the embodiment, the middle roof assembly 232 is located in the middle, the top of the middle roof assembly is high, the flat roof assembly 232 is located at two ends, the height of the upper surface of the flat roof assembly is lower than that of the middle roof assembly 232, the upper surface of the flat roof assembly is a plane, most of equipment originally hung on the underframe can be installed on the upper surface of the flat roof assembly 232, the load of the underframe is reduced, the space for installing the equipment is saved, in addition, the middle roof assembly can be replaced according to different vehicle type requirements, and the utilization rate of the roof is increased.

Further, the flat top assembly 232, the middle top assembly 231 and the inclined end top assembly 233 are all made of profiled cross-section profiles.

The section bar is an object with a certain geometric shape, which is made of iron or steel and materials with certain strength and toughness through the processes of rolling, extruding, casting and the like. The special-shaped section is also called a complex section and is characterized in that the cross section has obvious convex-concave branches. Compared with a solid plate, the hollow shell structure has the advantages of saving materials and reducing weight, and the inner branches of the hollow shell structure can be used as reinforcing ribs or reinforcing ribs to ensure the strength of the member. Besides, the gap between the inner branch and the shell can be used for arranging lines of an electrical system, and the wiring outside the automobile is avoided.

Fig. 5 is an enlarged view of a portion a of fig. 4. Further, as shown in fig. 4 and 5, the flat top component 232, the middle top component 231 and the inclined end top component 233 are connected together by means of assembly welding, wherein the connecting portion of the inclined end top component 233 and the middle top component 231 is embedded in the end opening of the middle top component; the oblique tip assembly 233 is connected to the middle tip assembly at the connection point by a first type of weld 2351 on the inside and a second type of weld 2352 on the outside. Fillet welds are used because the two joint faces to which the first type of weld 2351 is to be secured are right angles; and two connection faces to be fixed by the second type of weld 2352 are 270 degrees, so that great processing difficulty is brought by adopting fillet weld connection, and the connection is carried out by adopting a V-shaped weld. In the welds mentioned subsequently in this embodiment, the first type of weld 2351 is a fillet weld and the second type of weld 2352 is a V-shaped weld, as required by the process.

On the basis of the above technical solution, the present embodiment provides an implementation manner of the flat top component 232:

fig. 6 is a cross-sectional view of a flat top composition provided by an embodiment of the present application. As shown in fig. 6, the flat top assembly 232 includes a flat top side beam 2322 and a flat top center beam 2321, wherein the upper surface of the flat top center beam 2321 is a plane, the flat top side beams 2322 are symmetrically disposed on two sides of the flat top center beam by taking the longitudinal center line of the roof as an axis, and the flat top side beams 2322 and the flat top center beam 2321 are connected together by assembly welding.

The flat top center sill 2321 is formed by splicing a plurality of profiles and comprises a flat top center sill middle profile 2321a, a flat top center sill first transition profile 2321b and a flat top center sill second transition profile 2321c, wherein the flat top center sill middle profile 2321a is positioned in the middle, and the structure of the flat top center sill middle profile 2321a is bilaterally symmetrical by taking a longitudinal central axis of a car roof as an axis; a pair of first transition section bars 2321b of the flat top center sill are symmetrically arranged at the left and right of the two sides of the middle section bar 2321a of the flat top center sill by taking the longitudinal central axis of the car roof as an axis; the second flat-top center sill transition section 2321c is arranged on the outer side of the first flat-top center sill transition section 2321b, and the second flat-top center sill transition section 2321c is also symmetrical left and right by taking the longitudinal central axis of the roof as an axis. The flat top centre sill middle section 2321a and the flat top centre sill first transition section 2321b are fixedly connected by a first type of welding seam 2351 in an assembly welding manner, and the flat top centre sill first transition section 2321b and the flat top centre sill second transition section 2321c are also fixedly connected by a first type of welding seam 2351 in an assembly welding manner.

The cross section of the flat top side beam 2322 is a laterally-placed 'T' -shaped structure, and the extending end of the flat top side beam is fixedly connected with the second transition section 2321c of the flat top center beam by adopting a second type of welding seam 2352 in an assembly welding mode.

Adopt a plurality of section bars concatenation, can guarantee that its profile forms the plane according to the design demand, have sufficient firmness, and easily change and the maintenance, when one of them fractional damage, only change corresponding section bar can.

Further, the flat top assembly 232 further comprises a flat top blocking section 2323, the shape of the flat top blocking section 2323 is matched with the cross section of the flat top assembly 232 and is arranged at the end of the flat top assembly 232 which is not connected with the inclined end top assembly, and the open end of the flat top assembly 232 is used for blocking the end opening of the flat top assembly 232.

Fig. 7 is an enlarged view of the portion C of fig. 4. Further, as shown in fig. 7, the head of the flat top plugging profile 2323 has a wedge-shaped structure, wherein the wedge-shaped structure on one side is embedded into the open end of the flat top component 232, the inner side of the connection between the flat top plugging profile 2323 and the flat top component is connected by a first type of welding seam 2351, and the outer side is connected by a second type of welding seam 2352.

For the middle top component 231, the embodiment provides a specific implementation manner:

fig. 8 is a cross-sectional view of a middle roof assembly provided by an embodiment of the present application. As shown in fig. 3 and 8, the middle roof assembly 231 is integrally in a hood-type structure, and includes a middle roof beam 2311, a middle roof sill 2313 and a middle roof transition beam 2312, the middle roof beam is located at the middle roof 2311, and the structure thereof is axisymmetrical with the longitudinal center line of the roof; the middle top and bottom beams 2312 are arranged below two sides of the middle top and bottom beam 2311 and are arranged symmetrically by taking the longitudinal center line of the roof as an axis, two sides of the middle top and bottom beam 2312 are respectively connected with the middle top and

bottom beams

2311 and 2313, the profile of the middle top and bottom beam 2312 is in a transition curve shape on the cross section formed by the middle top, and the middle top and

bottom beams

2311, 2312 and 2313 are connected together in a mounting and welding mode.

In this particular embodiment, similar to the flat top assembly 232, the middle top beam 2311 is also formed by splicing a plurality of profiles, and the spliced profiles are connected by a first type of weld 2351; the middle roof transition beam 2312 is also formed by splicing a plurality of profiles, the profile curves of the middle roof assembly 231 are combined by utilizing different included angles between the profiles of the middle roof transition beams 2312 and the horizontal plane, and the profiles of the middle roof transition beams 2312 are connected by a second type of welding line 2352. The outer contour of the middle top assembly 231 is designed, a flow guide cover type outer contour is adopted, electric circuits are all arranged in the inner cavity of the section bar of the middle top assembly 231, the outer surface of the middle top assembly is relatively smooth, the flow guide effect is achieved, and the flow guide cover does not need to be installed.

In practical application, the profile of the middle roof assembly 231 can be designed according to requirements, for example, windows are formed in two sides of the middle roof assembly, namely the side face formed by the middle roof transition beam 2312 and the middle roof bottom beam 2313, so that the middle roof assembly can be used by a vehicle with a passenger demand; the profile can be designed into other types of domes or flat tops without windows, and the vehicle without passenger demands can be used.

For the oblique-end-top component 233, the embodiment also provides a specific implementation manner:

fig. 9 is a longitudinal cut view of a beveled tip assembly provided in accordance with an embodiment of the present application. As shown in fig. 3 and 9, the inclined top assembly 233 includes an inclined top section 2331, an inclined top section 2333, and an inclined top transition section 2332 connecting the inclined top section 2331 and the inclined top section 2333, and the outer contour of the inclined top assembly 233 is matched with the inner contour of the gap surrounded by the ends of the middle top assembly 231 and the flat top assembly 232.

The oblique-end top-bottom section 2333 is obliquely downward and obliquely downward from the oblique-end top section 2331. The beveled top section 2331 is connected to the beveled top transition section 2332 by a second type of weld 2352, and the beveled top bottom section 2333 is connected to the beveled top transition section 2332 by a second type of weld 2352.

Fig. 10 is an enlarged view of a portion B of fig. 4. As shown in fig. 10, further, the oblique end top 233 assembly further includes an oblique end top connecting plate 2334, the oblique end top connecting plate 2334 is disposed between the oblique end top and bottom end profile 2333 and the flat top assembly 232, and the flat top assembly 232 and the oblique end top and bottom end profile 2333 are respectively and fixedly connected to the oblique end top connecting plate 233 by the first type of welding line 2351.

Further, the inclined end top assembly 233 is provided with an air conditioner air supply outlet and an air conditioner air return inlet to reduce the area of the flat top assembly 232 occupied by the air conditioning unit, so that more equipment can be installed on the flat top assembly 232.

The roof adopting the middle roof component 231, the flat roof component 232 and the inclined end roof component 233 has the flat roof which can be used for installing equipment, thus reducing the load of the underframe and saving the space; the outer contour of the roof of the car accords with aerodynamics, has the function of flow guiding, and does not need to be additionally provided with a flow guiding cover; the inclined end top of the air conditioner is provided with an air conditioner air supply outlet and an air return inlet, so that the flat top area occupied by the air conditioner unit is reduced, and the space is further saved; the use requirements of different vehicles can be met by replacing the middle roof module, and the interchangeability is high.

The embodiment also provides a vehicle body, comprising an underframe, side walls 22 provided with side window windows 22a, end walls and the vehicle roof, wherein the side walls 22 are vertically arranged at two sides of the underframe, the end walls are vertically arranged at two ends of the underframe, the upper ends of the side walls and the end walls are connected with the vehicle roof, and the lower ends of the side walls and the end walls are connected with the underframe.

The embodiment also provides an implementation mode of the underframe, which is suitable for double-deck vehicles:

fig. 11 is a schematic structural view of a dual-layer chassis according to an embodiment of the present disclosure, fig. 12 is a schematic structural view of a chassis connection accessory, fig. 13 is a schematic structural view of an end module of a lower chassis, fig. 14 is a schematic structural view of a middle module of the lower chassis, and fig. 15 is a schematic structural view of an upper chassis.

The double-layered chassis shown in fig. 11 includes: a lower chassis 246 and an upper chassis 247, specifically, the lower chassis 246 includes a lower chassis middle module 2461 and a lower chassis end module 2462 connected to each other, wherein the lower chassis middle module 2461 is positioned lower than the lower chassis end module 2462; the upper chassis 247 includes an upper chassis middle module 2471 and an upper chassis end module 2472 connected to each other.

The number and the longitudinal position of each module can be arranged according to the needs, in this embodiment, the lower chassis middle module 2461 of each car body (or each carriage) is one, and the two lower chassis end modules 2462 are symmetrically arranged at two ends of the lower chassis middle module 2461, and form a ladder-shaped structure with two high ends and a low middle part; the upper-layer underframe middle module 2471 is also one, and the two upper-layer underframe end modules 2472 are symmetrically arranged at two ends of the upper-layer underframe middle module 2471, wherein each module is respectively assembled by applicable sectional materials, can also be respectively integrally formed and processed, and can be flexibly assembled according to requirements; during the application, each module can design respectively according to the motorcycle type of difference, splices when using, for example different motorcycle types, can only change middle part module in order to adapt to the demand, perhaps again, when needs carry cargo, can demolish upper underframe in order to increase goods bearing capacity etc. can adapt to multiple motorcycle type, and the compatibility is high. Lower floor's chassis middle part module 2461 sinks, can provide the space for the lower floor's passenger, and the gate setting is in this region, and is nearer apart from ground, can make things convenient for the passenger to get on or off the bus and goods handling.

Further, the double-deck chassis also includes a lower chassis attachment 2464, as shown in fig. 12, and the lower chassis middle module 2461 and the lower chassis end module 2462 are coupled together by the lower chassis attachment 2464. The connection mode can be welding, and can also be any one of clamping, riveting, gluing and the like.

To accommodate the stepped configuration of the lower middle and upper ends of the lower chassis 246, the lower chassis attachment 2464 is stepped, with a first attachment connection 2464a at a lower end for connection to the lower chassis middle module 2461 and a second attachment connection 2464b at a higher end for connection to the lower chassis end module 2462. The connection sections of the first component connection part 2464a and the second accessory connection part 2464b are provided with comb-shaped structures, and can be inserted into the corresponding butt joint ports of the lower chassis middle module 2461 and the lower chassis end module 2462, so that the contact area of the connection part and the attachable area of a reinforcing material (such as solder) are increased, the connection reliability is increased, and the service life of the chassis is prolonged.

On the basis of the above technical solution, the embodiment of the present application provides a specific implementation manner of the lower chassis end module 2462: as shown in fig. 3, the lower-deck chassis end beam 2462a, the lower-deck chassis draft sill 2463b, and the draft sill front end plate 2463c are included, where the lower-deck chassis end beam 2462a is a strip structure formed by splicing profiles, and the lower-deck chassis draft sill 2463b and the draft sill front end plate 2463c are disposed on the lower surface of the lower-deck chassis end beam 2462 a. The lower underframe draft sill 2462b comprises two vertical plates arranged in parallel in the longitudinal direction, and one end of each vertical plate is vertically fixed on a front end plate 2463c of the draft sill.

The lower underframe draft sill 2462b may be secured by any means such as welding, riveting, screwing, etc. that allows it to be fixedly attached to the underside of the lower underframe end sill 2462 a.

Further, a draft sill front end plate 2463c is located at an outer end of the lower bed end beam 2462a, and an inner end of the lower bed end beam 2462a is connected to the second attachment connection portion 2464b of the lower bed attachment. The outer ends are inner ends relative to the lower chassis middle module 2461 at the end closer to the lower chassis middle module 2461 and outer ends at the end farther from the lower chassis middle module 2461, i.e., the ends of the lower chassis 246 are considered outer ends when viewed as a whole. The end beam 2462a of the lower underframe and the draft sill 2462b of the lower underframe are respectively provided with a bogie interface and a coupler connecting interface which are main force-transferring stress parts of the double-layer underframe. The double riser structure of the lower underframe draft sill 2462b can disperse the tension force transmitted by the coupler.

On the basis of the above technical solution, the embodiment of the present application further provides a specific implementation manner of the lower chassis middle module 2461, as shown in fig. 14, the lower chassis middle module includes a lower chassis boundary beam 2461b and a lower chassis middle beam 2461a, where the lower chassis middle beam 2461a is a profile whose upper surface is planar and whose structure uses the longitudinal central axis of the double-layer chassis as an axis symmetry, the side edge of the lower chassis boundary beam 2461b is erected and the lower chassis boundary beam is arranged left and right on both sides of the lower chassis middle beam 2461a using the longitudinal central axis of the double-layer chassis as an axis, and the lower chassis boundary beam 2461b and the lower chassis middle beam 2461a are spliced to form the lower chassis middle module. Lower floor frame middle part roof beam 2461a and lower floor frame boundary beam 2461b can be monoblock mother metal integrated into one piece, also can be that the polylith section bar concatenation forms, and lower floor frame middle part roof beam 2461a and lower floor frame boundary beam 2461b adopt the mode of assembly welding to link together.

Further, a lower chassis accessory connection interface is disposed at an end of the lower chassis middle module 2461 for connecting with the first accessory connection portion 2464a of the lower chassis accessory.

For the upper chassis 247, the embodiment of the present application also provides a specific implementation manner, as shown in fig. 15, which is formed by splicing long and large section bars, wherein the upper surface of the middle module 2471 of the upper chassis is a plane.

Further, the middle portion of the upper chassis end module 2472 is formed by an extension portion of a middle section of the upper chassis middle module 2471, two sides of the upper chassis end module 2472 extend obliquely upward in a fin shape in a stepped structure, and the fin shape of the upper chassis end module 2472 extends in an axisymmetric manner by using a longitudinal central axis of the double-layer chassis. The structure is designed such that the shear stress applied to the upper chassis 247 at the joint of the two ends can be transferred to multiple directions to cancel each other out, thereby increasing the stability of the upper chassis 247.

The two sides of the lower chassis 246 and the upper chassis 247 are both provided with side wall connecting interfaces, the upper surfaces of the side wall connecting interfaces are both provided with seat mounting interfaces, and the lower chassis is also provided with a vehicle door mounting interface.

The double-layer underframe with the structure has high modularization degree, and the modules are mutually independent, so that the double-layer underframe is convenient and quick to manufacture, simple and convenient to maintain and flexible and changeable to apply; the rail vehicle is applied to the rail vehicle, the interior of the vehicle body is divided into an upper layer of space and a lower layer of space, passengers can be carried, the carrying capacity is increased, the doorway position is close to the rail surface, and the loading and unloading of the goods are facilitated.

The specific embodiment also provides a rail vehicle which comprises the vehicle body, wherein the number of the vehicle bodies can be multiple and the vehicle bodies are connected in series. The vehicle body and the rail vehicle provided by the embodiment have the same technical effects as the vehicle roof.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A vehicle roof, comprising:

2. The vehicle roof as claimed in claim 1, characterized in that: the middle roof assembly is positioned in the middle of the roof, the flat roof assembly is arranged at two ends of the roof in the longitudinal direction, and the flat roof assembly and the middle roof assembly are connected together through the inclined end roof assembly.

3. The vehicle roof as claimed in claim 2, characterized in that: the flat top assembly, the middle top assembly and the inclined end top assembly are all made of special-shaped section profiles.

4. The vehicle roof of claim 3, characterized in that: the flat top assembly, the middle top assembly and the inclined end top assembly are connected together in an assembly welding mode, wherein the part, connected with the middle top assembly, of the inclined end top assembly is embedded in an end opening of the middle top assembly; the inner side of the joint of the inclined end top assembly and the middle top assembly is connected through a first type of welding line, and the outer side of the joint is connected through a second type of welding line.

5. The vehicle roof of claim 3, characterized in that: the flat top assembly comprises a flat top edge beam and a flat top center beam, wherein the upper surface of the flat top center beam is a plane, the flat top edge beams are symmetrically arranged on two sides of the flat top center beam by taking the longitudinal center line of the car roof as an axis, and the flat top edge beam and the flat top center beam are connected together in an assembly welding mode.

6. The vehicle roof of claim 5, characterized in that: the flat top assembly also comprises a flat top plugging section bar, the shape of the flat top plugging section bar is matched with the cross section of the flat top assembly and is arranged at one end of the flat top assembly which is not connected with the inclined end top assembly, and the flat top plugging section bar is used for plugging an end opening of the flat top assembly.

7. The vehicle roof as claimed in claim 6, characterized in that: one part of the flat-top plugging section bar is embedded into an end opening formed by the flat top, the inner side of the connection part formed by the flat-top plugging section bar and the flat top is connected through a first type of welding line, and the outer side of the connection part is connected through a second type of welding line.

8. The vehicle roof of claim 3, characterized in that: the middle roof is integrally in a cover type structure and comprises a middle roof beam, a middle roof bottom beam and a middle roof transition beam, the middle roof beam is located at the middle roof, the middle roof bottom beam is located below two sides of the middle roof top beam and is symmetrically arranged by taking the longitudinal center line of the roof as an axis, two sides of the middle roof transition beam are respectively connected with the middle roof beam and the middle roof bottom beam, the outline of the middle roof transition beam is in a transition curve shape on the cross section formed by the middle roof, and the middle roof beam, the middle roof transition beam and the middle roof bottom beam are connected together in a assembling and welding mode.

9. The vehicle roof of claim 8, characterized in that: and windows are arranged on the middle top transition beam and the middle top bottom beam.

10. The vehicle roof of claim 3, characterized in that: the inclined end top assembly comprises an inclined end top section, an inclined end top bottom section and an inclined end top transition section for connecting the inclined end top section and the inclined end top bottom section, and the outer contour of the inclined end top assembly is matched with the inner contour of a gap formed by the middle top assembly and the end part of the flat top assembly.

11. The vehicle roof of claim 10, characterized in that: the inclined end top assembly further comprises an inclined end top connecting plate, the inclined end top connecting plate is arranged between the section bar at the bottom end of the inclined end top and the flat top assembly, the inclined end top assembly is connected with the flat top assembly through the inclined end top connecting plate, and the flat top assembly and the inclined end top assembly are respectively connected with the inclined end top connecting plate through a first type of welding line.

12. The vehicle roof as claimed in claim 11, characterized in that: and an air conditioner air supply outlet and an air conditioner air return inlet are arranged on the inclined end top assembly.

13. A vehicle body, characterized by comprising: underframe, side walls, end walls and roof according to any of claims 1-12, wherein the side walls are arranged vertically on both sides of the underframe and the end walls are arranged vertically at both ends of the underframe, the side walls and the end walls being connected at their upper ends to the roof and at their lower ends to the underframe.

14. A rail vehicle, comprising: the vehicle body of claim 13.