CN220682362U - Vehicle body structure and rail vehicle - Google Patents

Abstract

The utility model discloses a vehicle body structure and a railway vehicle. In the vehicle body structure, the dimension of the goods inlet and outlet along the length direction of the vehicle body is more than 3m; the first side frame provided with the goods inlet and outlet comprises a traction beam, a lower side beam and a traction beam which are sequentially connected along the length direction of the vehicle body, wherein the middle section area of the lower side beam limits the lower boundary of the goods inlet and outlet, the lower side beam is of a channel steel type, the opening of the channel steel type lower side beam faces to the opposite side first side frame, the upper boundary of the channel steel type lower side beam is horizontally arranged, the size of the middle section area of the channel steel type lower side beam along the height direction of the vehicle body is larger than the size of the two ends of the channel steel type lower side beam along the height direction of the vehicle body, and a section which monotonically increases along the height direction of the vehicle body does not exist from the position of the channel steel type lower side beam with the largest size along the height direction of the vehicle body to any one end area; the first frame at one side provided with the goods inlet and outlet also comprises a lower side beam inner sealing plate for sealing the opening of the groove steel type lower side beam. Is suitable for transporting large-size goods.

Description

Vehicle body structure and rail vehicle

Technical Field

The present utility model relates to a vehicle body structure and a railway vehicle.

Background

The railway transportation goods in China are various, and railway vehicles suitable for the railway transportation goods also show various developments. Through years of development, china forms a unique railway vehicle technology, promotes the comprehensive and rapid development of railway vehicles in China, and makes an important contribution to the development of national economy and railway transportation.

Railway vehicles and even light rail vehicles are often used for personnel to come in and go out and shipment small-size goods, and the opening is generally not more than 3 meters, can satisfy general goods loading and unloading usefulness. However, with the update of product technology, the types and volumes of cargoes are also changed, and the opening degree of the side door of the railway vehicle is also changed with the transportation demand and the characteristics of the cargoes. However, if the oversized opening side door is provided, the continuous thin-walled cylindrical structure of the existing vehicle is broken, so that the stress conduction of the vehicle is not continuous, and the overall strength and rigidity of the vehicle are deteriorated.

With the development of economy and society, the variety of goods is increasing, and the requirements of users on the transportation safety, concealment and transportation efficiency of special goods (such as oversized goods) are increasing.

Disclosure of Invention

The utility model provides a vehicle body structure and a railway vehicle.

The utility model provides the following technical scheme: a vehicle body structure comprising: the chassis and the roof are arranged oppositely, two side walls are arranged oppositely, two end walls are arranged oppositely, the side walls extend along the length direction of the vehicle body, the normal direction of the plane where the side walls are positioned is the width direction of the vehicle body, the normal direction of the plane where the chassis is positioned is the height direction of the vehicle body, the normal direction of the plane where the end walls are positioned is the length direction of the vehicle body,

forming a goods inlet and outlet at the middle section of at least one side wall along the length direction of the car body, wherein the size of the goods inlet and outlet along the length direction of the car body is more than 3m;

the underframe comprises two first frames which extend along the length direction of the car body and are opposite to each other along the width direction of the car body, one side first frame provided with the goods inlet and outlet comprises a traction beam, a lower side beam and a traction beam which are sequentially connected along the length direction of the car body, the middle section area of the lower side beam limits the lower boundary of the goods inlet and outlet, the lower side beam is of a channel steel type, the opening of the channel steel type lower side beam faces to the opposite side first frames, the upper boundary of the channel steel type lower side beam is horizontally arranged, the dimension of the middle section area of the channel steel type lower side beam along the height direction of the car body is larger than the dimension of the two ends of the channel steel type lower side beam along the height direction of the car body, and a section which monotonically increases along the height direction of the car body does not exist from the position of the largest dimension of the channel steel type lower side beam along the height direction of the car body to any one end area; the first frame at one side provided with the goods inlet and outlet also comprises a lower side beam inner sealing plate for sealing the opening of the groove steel type lower side beam. The lower side beam of the fish belly type is matched with the lower side beam inner sealing plate, so that the rigidity of the underframe is greatly improved, the stress continuity of the vehicle is improved, and the bearing capacity of the railway vehicle is improved.

Alternatively, the lower boundaries of the middle region and the end regions of the channel-section lower side member are both horizontally arranged, and the lower boundary of the transition region between the middle region and the end regions is monotonously variable in height. The area of the lower side beam with larger size along the height direction of the vehicle body occupies larger area, so that the rigidity of the lower side beam is improved as much as possible.

Optionally, the underframe further comprises two large cross beams extending along the width direction of the vehicle body, two ends of any large cross beam are respectively connected with a first frame, and the boundary of the goods inlet and outlet extending along the height direction of the vehicle body and the large cross beam are opposite to each other along the width direction of the vehicle body;

any big crossbeam composition includes: the large cross beam web plate of the rectangular frame structure and at least one rib plate welded in the large cross beam web plate extend along the width direction of the vehicle body, and the rectangular long side of the boundary of the cross section of the large cross beam web plate is parallel to the plane of the underframe; the rib plates are flat and extend along the width direction of the vehicle body and are perpendicular to the plane where the underframe is located. The design of the large cross beam assembly is beneficial to improving the rigidity of the vehicle body.

Optionally, the side wall of one side of opening the goods import and export includes position first part and second part, first part with the second part is all including connecting into grid structure's second crossbeam and vertical beam, seal grid structure is towards the gatepost of contralateral grid structure's boundary, the second crossbeam extends along automobile body length direction, the vertical beam extends along automobile body direction of height, the gatepost extends along automobile body direction of height to be used for prescribing a limit to the border that the automobile body direction extends of goods import and export, the lower tip of gatepost with the lower side beam links to each other, the upper end of gatepost with the roof links to each other, the mechanical strength of gatepost is greater than the mechanical strength of vertical beam. The door post design improves the automobile body rigidity, and is less to the influence of automobile body weight.

Optionally, the door comprises a first corner reinforcement arranged at a corner of the side of the door pillar, which is towards the goods inlet and outlet, at the position where the door pillar is connected with the lower side beam. The first corner reinforcement contributes to the reinforcement of the vehicle body rigidity.

Optionally, the vehicle roof comprises two vehicle roof reinforced curved beams, the bending direction of the vehicle roof reinforced curved beams is the length direction of the vehicle body according to the right-hand spiral or the left-hand spiral, and the end part of the vehicle roof reinforced curved beams, which is close to the goods inlet and outlet, is connected with the upper end part of the door post;

the roof also comprises an upper side beam extending along the length direction of the vehicle body, and an upper side beam sealing plate fixed on the upper side beam and extending along the length direction of the vehicle body, wherein the upper side beam extends in two extending directions along the length direction of the vehicle body beyond the roof reinforcing curved beam and the upper side beam sealing plate, the upper side beam sealing plate is in a flat plate shape, the cross section of the upper side beam is in a trapezoid shape with a missing bottom edge, and the upper side beam sealing plate seals the opening of the upper side beam. The structure of the upper side rail and the upper side rail sealing plate contributes to the reinforcement of the rigidity of the vehicle body.

Optionally, the vehicle roof further comprises a plurality of vehicle roof curved beams, the bending direction of the vehicle roof curved beams is the length direction of the vehicle body according to the right-hand spiral or the left-hand spiral, and the mechanical strength of the vehicle roof reinforced curved beams is larger than that of the vehicle roof curved beams. With this design, the influence on the weight of the vehicle body is small.

Optionally, the roof further includes a second corner reinforcement provided at a position where the roof reinforcement rocker is connected to the upper side rail toward a corner region on one side of the cargo access. The second corner reinforcement contributes to the reinforcement of the vehicle body rigidity.

Optionally, a window and a passenger entrance are further formed in the side wall. This allows the rail vehicle to camouflage as a passenger vehicle.

The utility model provides the following technical scheme: a railway vehicle comprising the aforementioned vehicle body structure.

When the vehicle body structure is applied to a railway vehicle, the side opening can be designed to be large enough (for example, the dimension along the length direction of the vehicle body is between 3m and 7 m), the rigidity and the strength of the vehicle body structure can be ensured, and the vehicle body structure is suitable for transporting large-size cargoes and meets the safety specification.

Drawings

Fig. 1 is a schematic structural view of a vehicle body structure according to an embodiment of the present utility model.

Fig. 2 is a perspective view of a vehicle body structure according to an embodiment of the present utility model.

Fig. 3 is a schematic front view of an underframe in a vehicle body structure according to an embodiment of the present utility model.

Fig. 4 is a schematic top view of an underframe in a vehicle body structure according to an embodiment of the present utility model.

Fig. 5 is a cross-sectional view taken along line AA of fig. 3.

Fig. 6 is a schematic view of the structure of a side wall in a vehicle body structure according to an embodiment of the present utility model.

Fig. 7 is a partial perspective view of the sidewall shown in fig. 6.

Fig. 8 is a schematic front view of a roof in a vehicle body structure according to an embodiment of the present utility model.

Fig. 9 is a schematic cross-sectional view of the roof shown in fig. 8.

Fig. 10 is a partial perspective enlarged view of the peripheral region of the upper rail in fig. 9.

Fig. 11 is a schematic view of the structure of an end wall according to an embodiment of the present utility model.

Fig. 12 is a perspective view showing a related structure of a frame constituting two cargo access openings in a vehicle body structure according to an embodiment of the present utility model.

Fig. 13 is a partial perspective view of a large beam assembly in accordance with an embodiment of the present utility model.

Fig. 14 is a perspective view of a side sill peripheral structure in accordance with an embodiment of the present utility model.

Wherein the reference numerals are as follows: 1. a chassis; 2. a side wall; 3. a roof; 4. end wall; 5. a coupler buffer device; 6. a windshield assembly; 11. a lower side beam; 12. a traction beam; 13. a sleeper beam web plate; 14. a cross beam; 15. a first cross beam; 16. a reinforcing block; 17. a large cross beam; 171. rib plates; 172. a large beam web; 18. a small middle beam; 19. an inner sealing plate of the lower side beam; 1a, a buffer beam; 1b, a traction beam; 1c, a sleeper beam; 21. a passenger doorway; 22. a window; 23. a cargo inlet and outlet; 2a, a first part of the side wall; 2b, a second part of the side wall; 24. a second cross beam; 25. a vertical beam; 26. a door post; 27. a first corner reinforcement; 28. a side wall plate; 29. a roof side rail; l, the length direction of the vehicle body; H. the height direction of the vehicle body; w, the width direction of the vehicle body; 31. a roof panel; 32. a second corner reinforcement; 33. a roof reinforcement camber beam; 34. an upper side beam; 35. roof bow; 36. an upper side beam sealing plate; 37. roof rail; 41. an end plate; 42. the mounting seat is formed; 43. a joint mounting seat; 44. and an end wall opening.

Detailed Description

The present utility model will be further described with reference to specific examples, but the scope of the present utility model is not limited thereto.

Fig. 1 is a schematic structural view of a vehicle body structure according to an embodiment of the present utility model. Fig. 2 is a perspective view of a vehicle body structure according to an embodiment of the present utility model.

Referring to fig. 1 and 2, the vehicle body structure includes: the roof and floor frames 1 and 3 disposed opposite to each other, the two side walls 2 disposed opposite to each other, and the two end walls 4 disposed opposite to each other. The underframe 1, the roof 3, the two side walls 2 and the two end walls 4 are connected into a continuous thin-wall cylindrical structure.

The body structure further comprises a coupler buffer 5 and a wind deflector 6 arranged on the end wall 4. The design of the coupler buffer 5 and the wind deflector 6 is not limited in the present utility model. The coupling damper 5 and the wind deflector 6 can be designed according to the prior art.

Fig. 3 is a schematic front view of the underframe 1 in the vehicle body structure of the embodiment of the present utility model. Fig. 4 is a schematic plan view of the underframe 1 in the vehicle body structure of the embodiment of the present utility model. Fig. 5 is a cross-sectional view taken along line AA of fig. 3.

Referring to fig. 3 to 5, the underframe 1 includes a bumper beam assembly 1a, a draft sill assembly 1b and a bolster assembly 1c lower side beam 11, a draft sill 12, a bolster web assembly 13, a cross beam assembly 14, a first cross beam 15, a reinforcing block 16, a large cross beam assembly 17, a small center beam 18, and a lower side beam inner seal plate 19.

Either one of the two frames of the underframe 1 extending in the vehicle body length direction L includes a traction beam 12, a lower side beam 11, and a traction beam 12 that are sequentially provided in the vehicle body length direction L. That is, the traction beam 12 is located at an end portion of the underframe 1 in the vehicle body longitudinal direction L, and the lower side member 11 is located at a middle portion of the underframe 1 in the vehicle body longitudinal direction L. The lower side member 11 and the traction beam 12 each extend integrally in the vehicle body length direction L.

Referring to fig. 3, 5 and 12, in order to enhance the overall rigidity of the vehicle, the lower side member 11 is formed of a 40a type channel steel (400 mm×100mm×10.5 mm) in a variable cross-section fish-belly type structure. The channel opens toward the side lower beams 11. The channel openings are directed toward the side lower beams 11.

"fish belly" means that the upper surface of the lower side member 11 is flush. When the railway vehicle formed of the vehicle body structure is placed horizontally, the upper boundary of the lower side member 11 is set horizontally. The dimension in the vehicle body height direction H at the middle position of the lower side member 11 is larger than the dimension in the vehicle body height direction H at the end position of the lower surface. There is no monotonically increasing area in the dimension of the lower side member 11 in the vehicle body height direction H from the middle portion of the lower side member 11 to the end portions of the lower side member 11.

The end portion of the lower side member 11 is disposed opposite to the bolster web assembly 13 in the vehicle body width direction W, and for example, the dimension of the lower side member 11 in the vehicle body height direction H at this region may be 180mm. The middle portion of the lower side member 11 is disposed opposite the cargo access opening 23 in the vehicle body height direction H, and for example, the dimension of the lower side member 11 in the vehicle body height direction H at this region may be 500mm.

The above numerical examples are merely illustrative of structural features of the lower side member 11, and are not intended to limit the dimensions of the lower side member 11.

To further improve the mechanical strength of the lower side member 11, the lower side member inner seal plate 19 seals the opening of the lower side member 11 toward the opposite side lower side member 11.

The buffer beam component 1a, the traction beam component 1b and the sleeper beam component 1c form a traction sleeper buffer component. The utility model does not limit the structure of the traction pillow buffer component, and can be designed according to the prior art.

The cross beam assembly 14, the first cross beam 15, the reinforcing block 16, the large cross beam assembly 17 and the small middle beam 18 are all arranged between the two lower side beams 11.

Referring to fig. 12 and 13, the large beam assembly 17 is located in the middle of the chassis 1, between the two door posts 26 and at a lower height than the door posts 26, and the large beam assembly 17 includes a large beam web 172 and a rib 171. The large cross member web 172 has a rectangular frame structure, and the inner space of the large cross member web 172 is a cubic space extending in the vehicle body width direction W. Two rib plates 171 which are arranged in a through length mode are welded inside the large beam web 172, and the function of reinforcing mechanical strength is achieved. The normal direction of the rib 171 is the vehicle body longitudinal direction L.

In the underframe 1 according to the embodiment of the present utility model, the structure is identical to that of the existing vehicle except for the large cross member 17.

Fig. 6 is a schematic structural view of the side wall 2 in the vehicle body structure according to the embodiment of the present utility model. Fig. 7 is a partial perspective view of the side wall 2 shown in fig. 6.

Referring to fig. 6 and 7 in combination with fig. 12, the side wall 2 is divided into two separate parts of a first part 2a and a second part 2b, the first part 2a and the second part 2b are arranged along the body length direction L, and a gap between the first part 2a and the second part 2b is used for forming a cargo access 23. The lower boundary of the cargo access 23 is defined by the underframe 1 and the upper boundary of the cargo access 23 is defined by the roof 3. This is to maximize the size of the cargo access 23 in the vehicle body height direction H. The first portion 2a and the second portion 2b of the side wall 2 are formed as separate structures from each other in order to maximize the dimension of the cargo access 23 in the longitudinal direction L of the vehicle body. In this way, the vehicle body structure can be made suitable for loading and unloading of large-sized cargo.

In a rail vehicle, side-opening doors are used to open and close the cargo access 23.

The first portion 2a and the second portion 2b of the side wall 2 each comprise: a plurality of second cross members 24, a plurality of vertical members 25, side wall panels 28, door posts 26, first corner reinforcements 27, and roof rails 29.

The second cross member 24 extends in the vehicle body longitudinal direction L, and the vertical beam 25 extends in the vehicle body height direction H, and the second cross member 24 crosses the vertical beam 25 to form a lattice frame.

The grid frame of the first portion 2a of the side wall 2 is provided with door posts 26 towards one side boundary of the second portion 2b of the side wall 2. And, the grid frame of the second portion 2b of the side wall 2 is provided with a door post 26 toward one side boundary of the first portion 2a of the side wall 2. The door post 26 extends in the height direction of the vehicle body and closes one side boundary of the grid frame. The two side boundaries of the cargo access 23, which are opposite to each other in the vehicle body length direction, are defined by two door posts 26.

A window 22 is provided in the grid frame of the second portion 2b of the side wall 2. The window 22 may be provided with transparent glass, for example. The window 22 may be implemented to camouflage rail vehicles to make them more like passenger vehicles.

The side wall plate 28 is provided on a side surface of the grid frame facing the space inside the vehicle body, and the side wall plate 28 and the grid frame are connected by an intermittent welding process.

The upper boundaries of the grid frames of the first and second portions 2a, 2b of the side wall 2 are closed by roof rails 29.

The first corner reinforcement 27 is provided at the junction of the jamb 26 with the chassis 1 towards the corner of the opposite jamb 26. The first corner reinforcing member 27 is, for example, a corner reinforcing iron.

The first portion 2a of the side wall 2 is provided with a passenger access opening 21 at a side end region thereof remote from the second portion 2b thereof. The second portion 2b of the side wall 2 is provided with a passenger doorway 21 at a side end region thereof remote from the first portion 2a thereof. This makes the vehicle more like a passenger vehicle, facilitating camouflage.

In one particular example, all of the cold-rolled sections in the side wall 2 are Q345NQR2 weather resistant steel. Intermittent welding is adopted between all beam columns and side wall boards, the height of a welding leg is 3mm, and plug welding is carried out.

In another embodiment, the first portion 2a of the side wall 2 is integrally connected to an upper portion (e.g., roof rail 29) of the second portion 2b, and the remainder of the first portion 2a and the second portion 2b of the side wall 2 are disconnected.

In a further embodiment, the first portion 2a of the side wall 2 is integral with the lower portion of the second portion 2b, and the remainder of the first portion 2a and the second portion 2b of the side wall 2 are disconnected.

In both embodiments the height of the cargo access 23 is slightly reduced.

Fig. 8 is a schematic front view of the roof 3 in the vehicle body structure of the embodiment of the utility model. Fig. 9 is a schematic cross-sectional view of the roof 3 shown in fig. 8. Fig. 10 is a partial perspective enlarged view of the peripheral region of the upper rail in fig. 9. Fig. 12 is a perspective view of a related structure of a frame constituting two cargo inlets and outlets 23 in a vehicle body structure according to an embodiment of the present utility model. Fig. 14 is a perspective view of a side sill peripheral structure in accordance with an embodiment of the present utility model.

Referring to fig. 8 to 10 and fig. 12 and 14, the roof 3 includes: roof panel 31, second corner reinforcement 32, roof reinforcement rocker 33, roof rail 34, roof rail 35, roof rail seal 36, and roof rail 37.

The roof panel 31 is a curved panel as a whole, the roof panel 31 extends in the vehicle body longitudinal direction L, the inner surface of the roof panel 31 is a partial side surface of an imaginary cylinder, and the extending direction of the axis of the imaginary cylinder is the vehicle body longitudinal direction L.

Referring to fig. 2 and 8, the roof panel 31 has a rectangular notch at the boundary opposite the cargo access 23. This is to further increase the size of the cargo access 23.

In the embodiment of the utility model, the side walls 2 on both sides are provided with openings for forming the cargo inlets and outlets 23, and the roof panel 31 on both sides are provided with notches for enlarging the cargo inlets and outlets 23.

In other embodiments, only a single side wall 2 is provided with an opening for forming the cargo access 23. The side wall 2, which is not formed with the cargo access opening, can be designed in the form of a passenger train.

The bending direction of the roof bow 35 is the vehicle body length direction L in accordance with the right-hand screw or the left-hand screw. The roof bow 35 is provided in plural and at intervals along the longitudinal direction L of the vehicle body.

The roof side rail 37 extends in the vehicle body longitudinal direction L, and is plural in number and is assembled and welded to the roof bow 35 to form a frame. Roof panel 31 is welded to the frame.

The front projection of the roof reinforcement beam 33 on the plane of the side wall 2 and the front projection of the door post 26 on the plane of the side wall 2 together define the boundary extending in the height direction of the vehicle of the front projection of the cargo access 23 on the plane of the side wall 2. The roof reinforcement braces 33 are connected at both ends to the upper end of one door pillar 26, respectively. The bending direction of the roof reinforcement rocker 33 is the vehicle body length direction L. The mechanical strength of the roof reinforcement camber beam 33 is greater than that of the roof camber beam 35, e.g., the width of the roof reinforcement camber beam 33 is greater than that of the roof camber beam 35.

The second corner reinforcing member 32 is provided at a corner of the roof reinforcement bent beam 33 at the junction with the upper side member 34 toward the side of the cargo inlet/outlet 23 for reinforcing the mechanical strength of the structure forming the cargo inlet/outlet 23.

The upper side member 34 has a bar shape extending in the vehicle body longitudinal direction L. At each end of the roof 3 in the vehicle width direction W, an upper side member 34 is provided for forming an upper boundary of the two cargo inlets and outlets 23. The upper side member 34 and the roof rail 35 are welded and fixed at the junction.

The mechanical strength of the upper side member 34 is greater than that of the roof rail 37.

Referring to fig. 12 and 14, the side sill 34 and the side sill cover 36 each extend along the length of the vehicle body. The cross section of the side sill 34 has an opening facing away from the side sill 34 and facing obliquely upward, and a side sill cover 36 seals the opening, the side sill 34 and the side sill cover 36 having a trapezoidal cross section in common. The bottom side of the trapezoidal cross section is located on the side of the top edge remote from the opposite side upper side rail 34. The length of the upper rail 34 is greater than the length of the upper rail seal plate 36. The long side rail seal plates 36 extend beyond the roof reinforcement rocker 33 in both directions of the vehicle body length direction L.

Fig. 11 is a schematic structural view of the headwall 4 according to an embodiment of the present utility model.

Referring to fig. 11, the headwall 4 includes an end plate 41, a mount assembly 42, and a joint mount 43. The headwall 4 is provided with headwall openings 44 for passengers to enter one body structure from the other. Note that, in the railway vehicle, a plurality of vehicle body structures are connected in order from front to rear.

The mounting base assembly 42 and the connector mounting base 43 are plugs for mounting and interfacing with electrical equipment.

The utility model is not limited to the structure of the headwall 4 and can be designed according to the prior art.

Fig. 12 is a perspective view of a related structure of a frame constituting two cargo inlets and outlets 23 in a vehicle body structure according to an embodiment of the present utility model.

The large cross beam assembly 17, the lower side beam 11, the door post 26, the roof reinforcement bent beam 33 and the upper side beam 34 form a frame structure similar to a cuboid, so that the strength of the vehicle is improved, and the strength and rigidity problems caused by the fact that the continuous structure of the vehicle body is damaged due to the large opening side door opening are solved.

Specifically, the bottom of the frame of the single cargo access 23 is defined by the lower side sill 11, the roof is defined by the upper side sill 34 and the upper side sill cover 36 together, and the frame between the same side ends of the upper side sill 34 and the lower side sill 11 in the vehicle body length direction L is formed by connecting the upper roof reinforcement bent sill 33, the door pillar 26 in this order from the top down. Two first corner reinforcements 27 are provided at the corners of the door post 26, which are connected to the lower side member 11, toward the cargo access 23, respectively. The two second corner reinforcements 32 are provided toward the corners of the cargo inlet and outlet 23 at the positions where the upper roof reinforcement rocker 33 and the upper side sill 34 are joined, respectively. The goods inlet and outlet 23 is of a frame type structure, and rigidity of the car body is guaranteed.

In the embodiments of the present utility model, the dimension of the cargo access opening 23 in the longitudinal direction L of the vehicle body may be made greater than or equal to 1/3 of the length of the vehicle body structure, and still sufficient vehicle body rigidity can be ensured. For example, the dimension of the cargo access 23 in the vehicle body length direction L may be designed to be 3m or more, even 6m or more.

Based on the same inventive concept, embodiments of the present utility model also provide a railway vehicle including the above-described vehicle body structure.

The embodiments of the present utility model are described in a progressive manner, and the same and similar parts of the embodiments are all referred to each other, and each embodiment is mainly described in the differences from the other embodiments.

The scope of the present utility model is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present utility model by those skilled in the art without departing from the scope and spirit of the utility model. It is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A vehicle body structure comprising: the chassis and the roof which are arranged oppositely, two side walls which are arranged oppositely, two end walls which are arranged oppositely, the side walls extend along the length direction of the vehicle body, the normal direction of the plane where the side walls are positioned is the width direction of the vehicle body, the normal direction of the plane where the chassis is positioned is the height direction of the vehicle body, the normal direction of the plane where the end walls are positioned is the length direction of the vehicle body,

forming a goods inlet and outlet at the middle section of at least one side wall along the length direction of the car body, wherein the size of the goods inlet and outlet along the length direction of the car body is more than 3m;

the underframe comprises two first frames which extend along the length direction of the car body and are opposite to each other along the width direction of the car body, one side first frame provided with the goods inlet and outlet comprises a traction beam, a lower side beam and a traction beam which are sequentially connected along the length direction of the car body, the middle section area of the lower side beam limits the lower boundary of the goods inlet and outlet, the lower side beam is of a channel steel type, the opening of the channel steel type lower side beam faces to the opposite side first frames, the upper boundary of the channel steel type lower side beam is horizontally arranged, the dimension of the middle section area of the channel steel type lower side beam along the height direction of the car body is larger than the dimension of the two ends of the channel steel type lower side beam along the height direction of the car body, and a section which monotonically increases along the height direction of the car body does not exist from the position of the largest dimension of the channel steel type lower side beam along the height direction of the car body to any one end area; the first frame at one side provided with the goods inlet and outlet also comprises a lower side beam inner sealing plate for sealing the opening of the groove steel type lower side beam.

2. The vehicle body structure according to claim 1, wherein the lower boundaries of the middle region and the end regions of the channel-section lower side member are each horizontally arranged, and the lower boundaries of the transition regions of the middle region and the end regions vary in height monotonously.

3. The vehicle body structure according to claim 1, wherein the underframe further comprises two large cross members extending in the vehicle body width direction, both ends of any one of the large cross members being connected to a first frame, respectively, and a boundary of the cargo access extending in the vehicle body height direction and the large cross member being opposite to each other in the vehicle body width direction;

any big crossbeam composition includes: the large cross beam web plate of the rectangular frame structure and at least one rib plate welded in the large cross beam web plate extend along the width direction of the vehicle body, and the rectangular long side of the boundary of the cross section of the large cross beam web plate is parallel to the plane of the underframe; the rib plates are flat and extend along the width direction of the vehicle body and are perpendicular to the plane where the underframe is located.

4. The vehicle body structure according to claim 1, wherein the side wall on the side where the cargo access is provided includes a first portion and a second portion, the first portion and the second portion each include a second cross member and a vertical member connected in a lattice structure, a door post closing a boundary of the lattice structure toward the opposite side of the lattice structure, the second cross member extends in a vehicle body length direction, the vertical member extends in a vehicle body height direction, the door post extends in the vehicle body height direction and is used for defining a boundary of the cargo access extending in the vehicle body height direction, a lower end portion of the door post is connected to the lower side member, an upper end portion of the door post is connected to the roof, and a mechanical strength of the door post is greater than that of the vertical member.

5. The vehicle body structure according to claim 4, further comprising a first corner reinforcement provided at a corner portion on a side toward the cargo access at a position where the door post is connected to the lower side member.

6. The vehicle body structure according to claim 4, wherein the roof includes two roof reinforcement bent beams, the bending direction of which is the vehicle body length direction in accordance with a right-hand screw or a left-hand screw, and the end of the roof reinforcement bent beam near the cargo access is connected to the upper end of the door pillar;

the roof also comprises an upper side beam extending along the length direction of the vehicle body, and an upper side beam sealing plate fixed on the upper side beam and extending along the length direction of the vehicle body, wherein the upper side beam extends in two extending directions along the length direction of the vehicle body beyond the roof reinforcing curved beam and the upper side beam sealing plate, the upper side beam sealing plate is in a flat plate shape, the cross section of the upper side beam is in a trapezoid shape with a missing bottom edge, and the upper side beam sealing plate seals the opening of the upper side beam.

7. The vehicle body structure of claim 6, wherein the roof further comprises a plurality of roof trusses, the bending direction of the roof trusses being the vehicle body length direction in terms of right-hand or left-hand spirals, the mechanical strength of the roof reinforcement trusses being greater than the mechanical strength of the roof trusses.

8. The vehicle body structure according to claim 6, wherein the roof further includes a second corner reinforcement provided toward a corner region on a side of the cargo access opening at a position where the roof reinforcement rocker is connected to the upper side rail.

9. The vehicle body structure of claim 1, wherein the side wall is further provided with a window and a passenger entrance.

10. A rail vehicle characterized by comprising the vehicle body structure according to any one of claims 1 to 9.