Vehicle body structure and railway vehicle

Abstract

The invention discloses a vehicle body structure and a railway vehicle. In the vehicle body structure, the size of the cargo inlet / outlet along the length direction of the vehicle body is greater than 3m; the first frame provided with the cargo inlet and outlet comprises a traction beam, a lower side beam and a traction beam which are sequentially connected in the length direction of the vehicle body, the middle section area of the lower side beam limits the lower boundary of the cargo inlet and outlet, the lower side beam is in a channel steel type, an opening of the channel steel type lower side beam faces the first frame on the opposite side, and the upper boundary of the channel steel type lower side beam is horizontally arranged. The size of the middle area of the channel steel type lower side beam in the height direction of the vehicle body is larger than that of the two ends of the channel steel type lower side beam in the height direction of the vehicle body, and a section with the size monotonically increasing in the height direction of the vehicle body does not exist from the position, with the largest size in the height direction of the vehicle body, of the channel steel type lower side beam to any end area. The first frame on the side provided with the goods inlet and outlet further comprises a lower side beam inner sealing plate for sealing an opening of the channel steel type lower side beam. The device is suitable for transportation of large-size goods.

Description

Technical Field

[0001] The invention relates to a vehicle body structure and a rail vehicle. Background Art

[0002] my country's railway transports a wide variety of goods, and the corresponding railway vehicles have also developed in a variety of ways. After years of development, my country has formed a unique railway vehicle technology, which has promoted the comprehensive and rapid development of my country's railway vehicles and made important contributions to the development of the national economy and railway transportation.

[0003] The side doors of railway vehicles and even light rail vehicles are often used for personnel entry and exit and loading small goods. The opening is generally no more than 3 meters, which can meet the general cargo loading and unloading needs. However, with the update of product technology, the types and volumes of goods are also changing, and the opening of the side doors of railway vehicles also changes with the transportation needs and the characteristics of the goods themselves. However, if an oversized side door is set, the continuous thin-walled cylindrical structure of the existing vehicle will be destroyed, making the force transmission of the vehicle discontinuous, and the overall strength and stiffness of the vehicle will deteriorate.

[0004] With the development of economy and society, the types of goods are increasing, and users' requirements for the transportation safety, concealment and efficiency of special goods (such as oversized goods) are constantly increasing. Summary of the invention

[0005] The invention provides a vehicle body structure and a rail vehicle.

[0006] The present invention provides the following technical solution: a vehicle body structure, comprising: a chassis and a roof arranged opposite to each other, two side walls arranged opposite to each other, and two end walls arranged opposite to each other, wherein the side walls extend along the length direction of the vehicle body and the normal direction of the plane where the side walls are located is the width direction of the vehicle body, the normal direction of the plane where the chassis is located is the height direction of the vehicle body, and the normal direction of the plane where the end walls are located is the length direction of the vehicle body.

[0007] A cargo inlet and outlet is formed at a middle position of at least one side wall along the length direction of the vehicle body, and the dimension of the cargo inlet and outlet along the length direction of the vehicle body is greater than 3m;

[0008] The chassis includes two first frames extending along the length direction of the vehicle body and opposite to each other along the width direction of the vehicle body. The first frame on the side where the cargo inlet and outlet are provided includes a traction beam, a lower beam and a traction beam connected in sequence along the length direction of the vehicle body. The middle section of the lower beam defines the lower boundary of the cargo inlet and outlet. The lower beam is a channel steel type. The opening of the channel steel type lower beam faces the first frame on the opposite side. The upper boundary of the channel steel type lower beam is arranged horizontally. The size of the middle area of ​​the channel steel type lower beam along the vehicle body height direction is greater than the size of its two ends along the vehicle body height direction. From the position where the size of the channel steel type lower beam along the vehicle body height direction is the largest toward any end area, there is no section with a monotonically increasing size along the vehicle body height direction. The first frame on the side where the cargo inlet and outlet are provided also includes a lower beam inner sealing plate that closes the opening of the channel steel type lower beam. The "fish belly" lower beam cooperates with the lower beam inner sealing plate to greatly improve the rigidity of the chassis, improve the force continuity of the vehicle, and improve the load-bearing capacity of the rail vehicle.

[0009] Optionally, the lower boundaries of the middle area and the end area of ​​the channel steel lower side beam are both set horizontally, and the lower boundary height of the transition area between the middle area and the end area changes monotonically. The area of ​​the lower side beam with a larger size along the vehicle body height direction accounts for a larger proportion, and the rigidity of the lower side beam is improved as much as possible.

[0010] Optionally, the chassis further comprises two large cross beams extending in the width direction of the vehicle body, and two ends of each large cross beam are respectively connected to a first frame, and the boundary of the cargo inlet and outlet extending in the height direction of the vehicle body is opposite to the large cross beam in the width direction of the vehicle body;

[0011] Any large cross beam component includes: a large cross beam web of rectangular frame structure and at least one rib welded in the large cross beam web, the large cross beam web extends 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 is parallel to the plane where the chassis is located; the rib is flat, extends along the width direction of the vehicle body, and is perpendicular to the plane where the chassis is located. The design of the large cross beam component helps to improve the rigidity of the vehicle body.

[0012] Optionally, the side wall with a cargo entrance and exit includes a first part and a second part, the first part and the second part both include a second cross beam and a vertical beam connected to form a grid structure, and a door post that closes the boundary of the grid structure toward the opposite grid structure, the second cross beam extends along the length direction of the vehicle body, the vertical beam extends along the height direction of the vehicle body, the door post extends along the height direction of the vehicle body and is used to define the boundary of the cargo entrance and exit extending along the height direction of the vehicle body, the lower end of the door post is connected to the lower side beam, the upper end of the door post is connected to the roof, and the mechanical strength of the door post is greater than the mechanical strength of the vertical beam. The design of the door post improves the rigidity of the vehicle body and has little effect on the weight of the vehicle body.

[0013] Optionally, the vehicle body further comprises a first corner reinforcement member disposed at a corner of a position where the door pillar is connected to the lower side beam and facing the cargo inlet and outlet. The first corner reinforcement member helps to enhance the rigidity of the vehicle body.

[0014] Optionally, the vehicle roof comprises two roof reinforcement curved beams, and the bending direction of the roof reinforcement curved beams is the length direction of the vehicle body according to a right-hand spiral or a left-hand spiral, and the ends of the roof reinforcement curved beams close to the cargo inlet and outlet are connected to the upper ends of the door pillars;

[0015] The roof also includes an upper beam extending in the length direction of the vehicle body, an upper beam sealing plate fixed on the upper beam and extending in the length direction of the vehicle body, the upper beam in two extending directions in the length direction of the vehicle body both extend beyond the roof reinforcing curved beam and the upper beam sealing plate, the upper beam sealing plate is in the shape of a flat plate, the cross section of the upper beam is a trapezoid with a missing bottom edge, and the upper beam sealing plate seals the opening of the upper beam. The structure of the upper beam and the upper beam sealing plate helps to enhance the rigidity of the vehicle body.

[0016] Optionally, the roof further comprises a plurality of roof curved beams, which are bent in a right-hand spiral or a left-hand spiral in the direction of the length of the vehicle body, and the mechanical strength of the roof reinforcing curved beam is greater than that of the roof curved beam. With such a design, the weight of the vehicle body is less affected.

[0017] Optionally, the roof further comprises a second corner reinforcement member disposed at a corner area on a side of the cargo inlet and outlet at a position where the roof reinforcement curved beam is connected to the upper side beam. The second corner reinforcement member helps to enhance the rigidity of the vehicle body.

[0018] Optionally, windows and passenger entrances and exits are also provided on the side walls, so that the rail vehicle can be disguised as a passenger vehicle.

[0019] The present invention provides the following technical solution: a rail vehicle, comprising the aforementioned vehicle body structure.

[0020] When the body structure of the present invention is used in a rail vehicle, the size of the side door can be designed to be large enough (for example, the size along the length of the vehicle body is between 3m and 7m), while still ensuring the rigidity and strength of the vehicle body structure, being suitable for the transportation of large-sized goods and meeting safety regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a vehicle body structure according to an embodiment of the present invention.

[0022] Figure 2 It is a three-dimensional schematic diagram of a vehicle body structure according to an embodiment of the present invention.

[0023] Figure 3It is a front view schematic diagram of the underframe in the vehicle body structure of an embodiment of the present invention.

[0024] Figure 4 It is a top view schematic diagram of the underframe in the vehicle body structure of an embodiment of the present invention.

[0025] Figure 5 yes Figure 3 Section view along line AA.

[0026] Figure 6 It is a schematic structural diagram of a side wall in a vehicle body structure according to an embodiment of the present invention.

[0027] Figure 7 yes Figure 6 A partial perspective view of the side wall shown.

[0028] Figure 8 It is a schematic front view of the roof in the vehicle body structure of an embodiment of the present invention.

[0029] Fig. 9 yes Figure 8 A schematic cross-sectional view of the roof is shown.

[0030] Fig.10 yes Fig. 9 A partial three-dimensional enlarged image of the area around the upper and middle side beams.

[0031] Fig.11 Schematic diagram of the structure of the end wall of an embodiment of the present invention.

[0032] Fig.12 It is a three-dimensional diagram of the related structures constituting the frames of two cargo entrances and exits in the vehicle body structure of an embodiment of the present invention.

[0033] Fig.13 It is a partial stereogram of the large crossbeam composition of an embodiment of the present invention.

[0034] Fig.14 It is a three-dimensional diagram of the peripheral structure of the upper beam according to an embodiment of the present invention.

[0035] The reference numerals are: 1, chassis; 2, side wall; 3, roof; 4, end wall; 5, hook buffer device; 6, windshield device; 11, lower side beam; 12, traction beam; 13, bolster web plate composition; 14, cross beam composition; 15, first cross beam; 16, reinforcement block; 17, large cross beam composition; 171, rib plate; 172, large cross beam web plate; 18, small middle beam; 19, lower side beam inner cover plate; 1a, buffer beam composition; 1b, traction beam composition; 1c, bolster beam composition; 21, passenger entrance and exit; 22, window; 23, cargo entrance and exit; 2 a. The first part of the side wall; 2b. The second part of the side wall; 24. The second cross beam; 25. The vertical beam; 26. The door pillar; 27. The first corner reinforcement; 28. The side wall panel; 29. ​​The upper side beam; 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. The roof panel; 32. The second corner reinforcement; 33. The roof reinforcement curved beam; 34. The upper side beam; 35. The roof curved beam; 36. The upper side beam sealing plate; 37. The roof longitudinal beam; 41. The end plate; 42. The mounting seat composition; 43. The joint mounting seat; 44. The end wall opening. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0037] Figure 1 It is a structural schematic diagram of a vehicle body structure according to an embodiment of the present invention. Figure 2 It is a three-dimensional schematic diagram of a vehicle body structure according to an embodiment of the present invention.

[0038] refer to Figure 1 and Figure 2 The vehicle body structure includes: a base frame 1 and a roof 3 arranged opposite to each other, two side walls 2 arranged opposite to each other, and two end walls 4 arranged opposite to each other. The base frame 1, the roof 3, the two side walls 2 and the two end walls 4 are connected to form a continuous thin-walled cylindrical structure.

[0039] The vehicle body structure further includes a coupler buffer device 5 and a windshield device 6 disposed on the end wall 4. The present invention does not limit the design of the coupler buffer device 5 and the windshield device 6. The coupler buffer device 5 and the windshield device 6 can be designed according to the prior art.

[0040] Figure 3 It is a front view schematic diagram of the underframe 1 in the vehicle body structure of an embodiment of the present invention. Figure 4 It is a schematic top view of the underframe 1 in the vehicle body structure of an embodiment of the present invention. Figure 5 yes Figure 3 Section view along line AA.

[0041] refer to Figures 3 to 5The chassis 1 includes a buffer beam assembly 1a, a traction beam assembly 1b and a bolster beam assembly 1c, a lower side beam 11, a traction beam 12, a bolster beam web assembly 13, a cross beam assembly 14, a first cross beam 15, a reinforcement block 16, a large cross beam assembly 17, a small middle beam 18, and a lower side beam inner cover plate 19.

[0042] Each of the two frames of the chassis 1 extending in the vehicle body length direction L includes a traction beam 12, a lower side beam 11, and a traction beam 12 which are sequentially arranged in the vehicle body length direction L. That is, the traction beam 12 is located at the end of the chassis 1 in the vehicle body length direction L, and the lower side beam 11 is located in the middle of the chassis 1 in the vehicle body length direction L. The lower side beam 11 and the traction beam 12 are extended in the vehicle body length direction L as a whole.

[0043] refer to Figure 3 , Figure 5 and Fig.12 In order to improve the overall rigidity of the vehicle, the lower side beam 11 is made of 40a channel steel (400mm×100mm×10.5mm) to form a variable cross-section fish belly structure. The opening of the channel steel faces the lower side beam 11 on the opposite side.

[0044] The "fish belly type" means that the upper surface of the lower side beam 11 is flush. When the rail vehicle formed by the vehicle body structure is placed horizontally, the upper boundary of the lower side beam 11 is set horizontally. The size of the lower side beam 11 in the middle position along the vehicle body height direction H is greater than the size of the lower surface in the vehicle body height direction H. From the middle of the lower side beam 11 to the end of the lower side beam 11, there is no monotonically increasing area of ​​the size of the lower side beam 11 in the vehicle body height direction H.

[0045] The end of the lower side beam 11 is arranged opposite to the bolster web assembly 13 along the vehicle width direction W. For example, the dimension of the lower side beam 11 in the vehicle height direction H at this area can be 180 mm. The middle part of the lower side beam 11 is arranged opposite to the cargo inlet and outlet 23 along the vehicle height direction H. For example, the dimension of the lower side beam 11 in the vehicle height direction H at this area can be 500 mm.

[0046] The above numerical examples are only used to illustrate the structural features of the lower beam 11 , and are not intended to limit the size of the lower beam 11 .

[0047] In order to further improve the mechanical strength of the lower beam 11 , the lower beam inner cover plate 19 seals the opening of the lower beam 11 toward the opposite lower beam 11 .

[0048] The buffer beam assembly 1a, the traction beam assembly 1b and the bolster beam assembly 1c constitute a traction-bolster-buffer assembly. The present invention does not limit the structure of the traction-bolster-buffer assembly, and it can be designed according to the prior art.

[0049] 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 .

[0050] Combination Fig.12 and Fig.13 The large crossbeam assembly 17 is located in the middle of the chassis 1, between the two door pillars 26 and lower than the door pillars 26. The large crossbeam assembly 17 includes a large crossbeam web 172 and a rib plate 171. The large crossbeam web 172 is a rectangular frame structure, and the internal space of the large crossbeam web 172 is a cubic space extending along the width direction W of the vehicle body. Two rib plates 171 arranged throughout the length are welded inside the large crossbeam web 172 to enhance the mechanical strength. The normal direction of the rib plate 171 is the length direction L of the vehicle body.

[0051] It should be noted that, in the chassis 1 of the embodiment of the present invention, except for the large cross beam component 17, the rest of the structure is consistent with that of the existing vehicle.

[0052] Figure 6 It is a schematic structural diagram of the side wall 2 in the vehicle body structure according to an embodiment of the present invention. Figure 7 yes Figure 6 A partial perspective view of the side wall 2 is shown.

[0053] refer to Figure 6 and Figure 7 Combined with Fig.12 The side wall 2 is divided into two separate parts, a first part 2a and a second part 2b, which are arranged along the length direction L of the vehicle body. The gap between the first part 2a and the second part 2b is used to form a cargo inlet and outlet 23. The lower boundary of the cargo inlet and outlet 23 is defined by the chassis 1, and the upper boundary of the cargo inlet and outlet 23 is defined by the roof 3. This is to maximize the size of the cargo inlet and outlet 23 along the height direction H of the vehicle body. The first part 2a and the second part 2b of the side wall 2 are separate structures from each other, which is to maximize the size of the cargo inlet and outlet 23 along the length direction L of the vehicle body. In this way, the vehicle body structure can be suitable for loading and unloading large-sized cargo.

[0054] In rail vehicles, side doors are used to open and close cargo access doors 23 .

[0055] The first part 2 a and the second part 2 b of the side wall 2 each include: a plurality of second cross beams 24 , a plurality of vertical beams 25 , a side wall plate 28 , a door post 26 , a first corner reinforcement piece 27 and an upper side beam 29 .

[0056] The second cross beam 24 extends along the vehicle body length direction L, and the vertical beam 25 extends along the vehicle body height direction H. The second cross beam 24 and the vertical beam 25 intersect to form a grid frame.

[0057] The grid frame of the first part 2a of the side wall 2 is provided with a gate post 26 on one side boundary of the second part 2b of the side wall 2. Also, the grid frame of the second part 2b of the side wall 2 is provided with a gate post 26 on one side boundary of the first part 2a of the side wall 2. The gate 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 inlet and outlet 23 that are opposite to each other in the length direction of the vehicle body are defined by two gate posts 26.

[0058] A window 22 is provided in the grid frame of the second part 2b of the side wall 2. The window 22 can be provided with transparent glass, for example. The window 22 can camouflage the rail vehicle, making it more like a passenger vehicle.

[0059] The side wall panel 28 is arranged on a side surface of the grid frame facing the inner space of the vehicle body, and the side wall panel 28 and the grid frame are connected by an intermittent welding process.

[0060] The upper boundaries of the grid frames of the first portion 2 a and the second portion 2 b of the side wall 2 are both closed by the upper side beam 29 .

[0061] The first corner reinforcement piece 27 is disposed at a corner of the connection between the door post 26 and the base frame 1 facing the opposite door post 26. The first corner reinforcement piece 27 is, for example, a corner reinforcement iron.

[0062] The first part 2a of the side wall 2 is provided with a passenger entrance 21 at an end area of ​​one side away from the second part 2b thereof. The second part 2b of the side wall 2 is provided with a passenger entrance 21 at an end area of ​​one side away from the first part 2a thereof. This makes the vehicle more like a passenger vehicle and facilitates camouflage.

[0063] In a specific example, all cold-bent profiles in the side wall 2 are Q345NQR2 atmospheric corrosion resistant steel. Intermittent welding is used between all beams and columns and the side wall panels, with a weld leg height of 3 mm, and plug welding is performed.

[0064] In another embodiment, the first portion 2a of the side wall 2 is connected to the upper portion of the second portion 2b (eg, the upper side beam 29) as a whole, and the rest of the first portion 2a and the second portion 2b of the side wall 2 are disconnected.

[0065] In another embodiment, the first portion 2a of the side wall 2 is connected to the lower portion of the second portion 2b, and the rest of the first portion 2a and the second portion 2b of the side wall 2 are disconnected.

[0066] In these two embodiments, the height of the cargo access opening 23 is slightly reduced.

[0067] Figure 8 It is a schematic front view of the roof 3 in the vehicle body structure of the embodiment of the present invention. Fig. 9 yes Figure 8 A schematic cross-sectional view of the roof 3 is shown. Fig.10 yes Fig. 9 A partial three-dimensional enlarged image of the area around the upper and middle side beams. Fig.12 It is a three-dimensional diagram of the related structures of the frames constituting the two cargo entrances and exits 23 in the vehicle body structure of the embodiment of the present invention. Fig.14 It is a three-dimensional diagram of the peripheral structure of the upper beam according to an embodiment of the present invention.

[0068] refer to Figures 8 to 10 as well as Fig.12 , Fig.14 The roof 3 includes: a roof panel 31 , a second corner reinforcement member 32 , a roof reinforcement curved beam 33 , an upper side beam 34 , a roof curved beam 35 , an upper side beam sealing plate 36 , and a roof longitudinal beam 37 .

[0069] The roof panel 31 is a curved panel as a whole and extends along the length direction L of the vehicle body. The inner surface of the roof panel 31 is a partial side surface of an imaginary column, and the extension direction of the axis of the imaginary column is the length direction L of the vehicle body.

[0070] Combination Figure 2 and Figure 8 The roof panel 31 has a rectangular notch at the boundary opposite to the cargo access 23. This is to further increase the size of the cargo access 23.

[0071] In the embodiment of the present invention, the side walls 2 on both sides are configured to form openings for the cargo access opening 23 , and the two sides of the roof panel 31 are configured to expand the gaps of the cargo access opening 23 .

[0072] In some other embodiments, only one side wall 2 is provided with an opening for forming a cargo entrance and exit 23. The side wall 2 without a cargo entrance and exit may be designed in the style of a passenger train.

[0073] According to the right-hand spiral or the left-hand spiral, the bending direction of the roof bow 35 is the vehicle body length direction L. There are a plurality of roof bows 35 and they are arranged at intervals along the vehicle body length direction L.

[0074] The roof longitudinal beams 37 extend in the vehicle body length direction L, and are multiple in number, and are welded together with the roof bow beam 35 to form a frame. The roof panel 31 is welded to the frame.

[0075] The orthographic projection of the roof reinforcing curved beam 33 on the plane where the side wall 2 is located and the orthographic projection of the door pillar 26 on the plane where the side wall 2 is located jointly define the boundary of the orthographic projection of the cargo entrance 23 on the plane where the side wall 2 is located extending in the vehicle body height direction. The two ends of the roof reinforcing curved beam 33 are respectively connected to the upper end of one door pillar 26. The bending direction of the roof reinforcing curved beam 33 is the vehicle body length direction L. The mechanical strength of the roof reinforcing curved beam 33 is greater than the mechanical strength of the roof curved beam 35, for example, the width of the roof reinforcing curved beam 33 is greater than the width of the roof curved beam 35.

[0076] The second corner reinforcement member 32 is disposed at a corner of the junction of the roof reinforcement curved beam 33 and the upper side beam 34 facing the cargo access opening 23 , and is used to enhance the mechanical strength of the structure forming the cargo access opening 23 .

[0077] The upper side beam 34 is in the shape of a strip extending along the vehicle body length direction L. An upper side beam 34 is provided at each end of the roof 3 along the vehicle body width direction W to form the upper boundary of the two cargo access openings 23. The upper side beam 34 is welded and fixed to the roof bow beam 35 at the intersection.

[0078] The mechanical strength of the upper side rail 34 is greater than the mechanical strength of the roof side rail 37 .

[0079] Combination Fig.12 and Fig.14 , the upper side beam 34 and the upper side beam sealing plate 36 both extend in the length direction of the vehicle body. The cross section of the upper side beam 34 has an opening facing away from the opposite side upper side beam 34 and tilted upward, and the upper side beam sealing plate 36 seals the opening. The upper side beam 34 and the upper side beam sealing plate 36 have a common cross section in a trapezoidal shape. The bottom side of the trapezoidal cross section is located on the side where the top side is away from the opposite side upper side beam 34. The length of the upper side beam 34 is greater than the length of the upper side beam sealing plate 36. The long side beam sealing plate 36 extends beyond the roof reinforcement curved beam 33 in both extension directions along the vehicle body length direction L.

[0080] Fig.11 4 is a schematic structural diagram of an end wall 4 according to an embodiment of the present invention.

[0081] refer to Fig.11 The end wall 4 includes an end plate 41, a mounting seat assembly 42 and a joint mounting seat 43. An end wall opening 44 is provided on the end wall 4 for allowing passengers to enter another car body structure from one car body structure. Note that in a rail vehicle, multiple car body structures are connected in sequence front to back.

[0082] The mounting base assembly 42 and the connector mounting base 43 are both used for installing and connecting plugs to the vehicle.

[0083] The present invention does not limit the structure of the end wall 4, and the end wall 4 may be designed according to the prior art.

[0084] Fig.12 It is a three-dimensional diagram of the related structures of the frames constituting the two cargo entrances and exits 23 in the vehicle body structure of the embodiment of the present invention.

[0085] The large cross beam 17, the lower side beam 11, the door pillar 26, the roof reinforcement curved beam 33 and the upper side beam 34 together form a frame structure that is approximately rectangular, thereby improving the strength of the vehicle and solving the strength and rigidity problems caused by the large-opening side door destroying the continuous structure of the vehicle body.

[0086] Specifically, the bottom of the frame of a single cargo access opening 23 is defined by the lower side beam 11, and the top is defined by the upper side beam 34 and the upper side beam cover plate 36. The frame between the ends of the upper side beam 34 and the lower side beam 11 on the same side along the vehicle body length direction L is formed by connecting the upper roof reinforcement curved beam 33 and the door pillar 26 from top to bottom. Two first corner reinforcements 27 are respectively arranged at the corners of the cargo access opening 23 at the position where the door pillar 26 is connected to the lower side beam 11. Two second corner reinforcements 32 are respectively arranged at the corners of the cargo access opening 23 at the position where the upper roof reinforcement curved beam 33 is connected to the upper side beam 34. The cargo access opening 23 is a frame structure to ensure the rigidity of the vehicle body.

[0087] In various embodiments of the present invention, the size of the cargo inlet and outlet 23 along the length direction L of the vehicle body can be greater than or equal to 1 / 3 of the length of the vehicle body structure, while still ensuring sufficient vehicle body rigidity. For example, the size of the cargo inlet and outlet 23 along the length direction L of the vehicle body can be designed to be greater than 3m, or even greater than 6m.

[0088] Based on the same inventive concept, an embodiment of the present invention further provides a rail vehicle, comprising the above-mentioned vehicle body structure.

[0089] The various embodiments of the present invention are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0090] The protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these changes and modifications.

Claims

1. A vehicle body structure, comprising: The underframe and the roof are arranged opposite to each other, the two side walls are arranged opposite to each other, and the two end walls are arranged opposite to each other, the side walls extend along the length direction of the vehicle body and the normal direction of the plane where the side walls are located is the width direction of the vehicle body, the normal direction of the plane where the underframe is located is the height direction of the vehicle body, and the normal direction of the plane where the end walls are located is the length direction of the vehicle body, characterized in that: A cargo inlet and outlet is formed at a middle position of at least one side wall along the length direction of the vehicle body, and the dimension of the cargo inlet and outlet along the length direction of the vehicle body is greater than 3m; The chassis includes two first frame frames extending in the length direction of the vehicle body and opposite to each other in the width direction of the vehicle body. The first frame on the side where the cargo entrance and exit are provided includes a traction beam, a lower side beam and a traction beam connected in sequence in the length direction of the vehicle body. The middle section of the lower side beam defines the lower boundary of the cargo entrance and exit. The lower side beam is a channel steel type. The opening of the channel steel type lower side beam faces the first frame on the opposite side. The upper boundary of the channel steel type lower side beam is horizontally arranged. The size of the middle area of ​​the channel steel type lower side beam in the direction of vehicle body height is greater than the size of its two ends in the direction of vehicle body height. There is no section with a monotonically increasing size in the direction of vehicle body height from the position where the channel steel type lower side beam has the largest size in the direction of vehicle body height toward any end area. The first frame on the side where the cargo entrance and exit are provided also includes a lower side beam inner sealing plate that closes the opening of the channel steel type lower side beam.

2. The vehicle body structure according to claim 1, characterized in that: The lower boundaries of the middle area and the end area of ​​the channel steel lower side beam are both arranged horizontally, and the height of the lower boundary of the transition area between the middle area and the end area changes monotonically.

3. The vehicle body structure according to claim 1, characterized in that: The chassis also includes two large crossbeams extending in the width direction of the vehicle body, and the two ends of each large crossbeam are respectively connected to a first frame, and the boundary of the cargo inlet and outlet extending in the height direction of the vehicle body is opposite to the large crossbeam in the width direction of the vehicle body; Any large crossbeam comprises: a large crossbeam web of a rectangular frame structure and at least one rib welded inside the large crossbeam web, wherein the large crossbeam web extends along the width direction of the vehicle body, and the rectangular long side of the boundary of the cross section of the large crossbeam web is parallel to the plane where the chassis is located; the rib is flat, extends along the width direction of the vehicle body, and is perpendicular to the plane where the chassis is located.

4. The vehicle body structure according to claim 1, characterized in that: A side wall with a cargo entrance and exit includes a first part and a second part, each of the first part and the second part includes a second cross beam and a vertical beam connected to form a grid structure, and a door post that closes the boundary of the grid structure toward the opposite grid structure, the second cross beam extends in the length direction of the vehicle body, the vertical beam extends in the height direction of the vehicle body, the door post extends in the height direction of the vehicle body and is used to define the boundary of the cargo entrance and exit extending in the height direction of the vehicle body, the lower end of the door post is connected to the lower side beam, the upper end of the door post is connected to the roof, and the mechanical strength of the door post is greater than the mechanical strength of the vertical beam.

5. The vehicle body structure according to claim 4, characterized in that: It also includes a first corner reinforcement member arranged at the corner of the position where the door post is connected to the lower side beam and facing the cargo entrance and exit.

6. The vehicle body structure according to claim 4, characterized in that: The roof comprises two roof reinforcement curved beams, and the bending direction of the roof reinforcement curved beams is the length direction of the vehicle body according to a right-hand spiral or a left-hand spiral, and the ends of the roof reinforcement curved beams close to the cargo inlet and outlet are connected to the upper ends of the door pillars; The roof also includes an upper side beam extending in the length direction of the vehicle body, an upper side beam sealing plate fixed on the upper side beam and extending in the length direction of the vehicle body, the upper side beam extends beyond the roof reinforcement curved beam and the upper side beam sealing plate in two extension directions along the length direction of the vehicle body, the upper side beam sealing plate is in the shape of a flat plate, the cross-section of the upper side beam is a trapezoid with a missing bottom edge, and the upper side beam sealing plate closes the opening of the upper side beam.

7. The vehicle body structure according to claim 6, characterized in that: The roof also includes a plurality of roof curved beams, and the bending direction of the roof curved beams is the length direction of the vehicle body according to a right-hand spiral or a left-hand spiral. The mechanical strength of the roof reinforcing curved beams is greater than the mechanical strength of the roof curved beams.

8. The vehicle body structure according to claim 6, characterized in that: The vehicle roof further includes a second corner reinforcement member disposed at a corner area on the cargo entrance side at a position where the vehicle roof reinforcement curved beam is connected to the upper side beam.

9. The vehicle body structure according to claim 1, characterized in that: The side walls are also provided with windows and passenger entrances and exits.

10. A rail vehicle, characterized in that: The vehicle body structure comprises the vehicle body structure according to any one of claims 1 to 9.

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