Vehicle body structure and railway vehicle

Abstract

The invention discloses a vehicle body structure and a railway vehicle, and belongs to the technical field of railway vehicles. According to the vehicle body structure and the railway vehicle, the vehicle body structure is divided into the multiple vehicle body subsections, the vehicle body subsections are integrally formed through the autoclave forming technology or the OOA forming technology, the size and appearance quality of all the vehicle body subsections can be guaranteed, and the manufacturing and assembling difficulty of the composite material vehicle body structure is reduced on the basis that light weight is achieved; meanwhile, the beams of the framework are formed through the pultrusion process, so that the structural strength of the vehicle body structure formed by connecting the multiple vehicle body subsections can meet the requirement, the safety performance of the vehicle body structure is guaranteed, and the production efficiency can be improved; the foaming pieces are arranged in the partition cavities of the framework, the sound insulation and heat insulation performance of the car body part is improved, the use performance of the car body structure can be improved, the use of sound insulation and heat insulation materials can be reduced when the car body structure is internally installed, and the effect of reducing the cost is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and particularly to a car body structure and a rail vehicle. Background Art

[0002] At present, most car body structures adopt metal materials. However, traditional structure trains made of metal materials have problems such as large weight, easy corrosion, and large welding deformation.

[0003] To solve the above problems, some manufacturers divide the car body of the car body structure into an upper car body, a lower car body, and end walls, and use carbon fiber composite materials to make the upper car body, the lower car body, and the end walls. The upper car body and the lower car body are joined together to form a total car body with open ends at both the front and the rear. The two end walls are respectively arranged at the two openings of the total car body. Compared with the car body made of traditional metal materials, although it can improve the safety of the car body and achieve lightweight, there are problems such as large manufacturing difficulty, difficult to guarantee the assembly dimensions, easy to generate manufacturing defects, and high later maintenance cost. At the same time, cavities are provided inside both the upper car body and the lower car body made of this carbon fiber composite material, and the sound insulation and heat insulation performance are poor. A large number of sound insulation and heat insulation materials need to be added during the interior decoration of the car body, which not only increases the cost but also affects the production efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a car body structure and a rail vehicle, which not only improve the service performance and safety performance of the car body structure on the basis of achieving lightweight, but also are easy to manufacture.

[0005] To achieve the above purpose, the following technical solutions are provided:

[0006] A car body structure includes a plurality of car body parts, and the plurality of car body parts are connected and enclosed to form an interior space; each car body part includes an outer skin, an inner skin, and a framework sandwiched between the outer skin and the inner skin. The framework includes a plurality of beams, and the beams are formed by pultrusion molding process. The plurality of beams are connected and form a plurality of cavities, and a foaming member is arranged in the cavities; the outer skin, the framework, the foaming member, and the inner skin of each car body part are integrally formed by autoclave molding process or OOA molding process.

[0007] As a preferred technical solution of the above car body structure, an adjustment gap is provided between two adjacent car body parts.

[0008] As a preferred technical solution of the above vehicle body structure, the multiple vehicle body sub - parts include a chassis, a roof, two side walls oppositely and spaced apart along the width direction of the vehicle body structure, and two end walls oppositely and spaced apart along the length direction of the vehicle body structure. Both of the two side walls are connected to the two end walls, the chassis is connected to the bottom ends of the two side walls and the two end walls, and the roof is connected to the top ends of the two side walls and the two end walls to enclose and form the interior space of the vehicle.

[0009] As a preferred technical solution of the above vehicle body structure, a first adjustment gap is provided between the side wall and the roof; and / or,

[0010] a second adjustment gap is provided between the side wall and the end wall; and / or,

[0011] a third adjustment gap is provided between the end wall and the roof.

[0012] As a preferred technical solution of the above vehicle body structure, the chassis includes:

[0013] a floor;

[0014] two bottom side beams, and the two bottom side beams are respectively connected to both sides of the floor along the width direction of the vehicle body structure;

[0015] two buffer beams, and the two buffer beams are respectively connected to both sides of the floor along the length direction of the vehicle body structure, and both of the two buffer beams are connected to the two bottom side beams.

[0016] As a preferred technical solution of the above vehicle body structure, the bottom side beam of the chassis is connected to the bottom end of the side wall, and a fourth adjustment gap is provided between the bottom side beam and the floor.

[0017] As a preferred technical solution of the above vehicle body structure, the multiple vehicle body sub - parts include a roof provided at the top of the interior space of the vehicle, and an end wall provided on one side of the interior space along the length direction of the vehicle body structure. The multiple beams of the roof include top cross - beams extending along the width direction of the vehicle body structure and top longitudinal beams extending along the length direction of the vehicle body structure. The multiple beams of the end wall include end cross - beams extending along the width direction of the vehicle body structure and end columns extending along the height direction of the vehicle body structure; the shapes and sizes of the cross - sections of the top cross - beams, the top longitudinal beams, the end cross - beams and the end columns are the same; and / or,

[0018] The multiple car body sections include a underframe disposed at the bottom of the interior space, and a side wall disposed on one side of the interior space along the width direction of the car body structure. The multiple beams of the side wall include side cross beams extending along the length direction of the car body structure, and the multiple beams of the underframe include bottom cross beams extending along the width direction of the car body structure; the cross-sectional shapes and dimensions of the side cross beams and the bottom cross beams are the same.

[0019] As a preferred technical solution of the above car body structure, the multiple car body sections include a underframe disposed at the bottom of the interior space, and a bottom decorative layer is provided on the inner skin of the underframe; and / or,

[0020] The multiple car body sections include a side wall disposed on one side of the interior space along the width direction of the car body structure, and a side decorative layer is provided on the inner skin of the side wall.

[0021] As a preferred technical solution of the above car body structure, the multiple car body sections include a underframe disposed at the bottom of the interior space, and the outer skin, the skeleton, the foaming member and the inner skin of the underframe are integrally formed by an autoclave molding process; and / or,

[0022] The multiple car body sections include a roof disposed at the top of the interior space, and the outer skin, the skeleton, the foaming member and the inner skin of the roof are integrally formed by an OOA molding process; and / or,

[0023] The multiple car body sections include a side wall disposed on one side of the interior space along the width direction of the car body structure, and the outer skin, the skeleton, the foaming member and the inner skin of the side wall are integrally formed by an OOA molding process; and / or,

[0024] The multiple car body sections include an end wall disposed at one end of the interior space along the length direction of the car body structure, and the outer skin, the skeleton, the foaming member and the inner skin of the end wall are integrally formed by an OOA molding process.

[0025] As a preferred technical solution of the above car body structure, the multiple car body sections include a underframe disposed at the bottom of the interior space, and a roof disposed at the top of the interior space, and the cross-sectional area of the beams of the underframe is larger than the cross-sectional area of the beams of the roof; and / or,

[0026] The multiple car body sections include a underframe disposed at the bottom of the interior space, and a side wall disposed on one side of the interior space along the width direction of the car body structure, and the cross-sectional area of the beams of the underframe is larger than the cross-sectional area of the beams of the side wall; and / or,

[0027] The multiple vehicle body sub - parts include a underframe disposed at the bottom of the vehicle interior space, and an end wall disposed on one side of the vehicle interior space along the length direction of the vehicle body structure. The cross - sectional area of the beams of the underframe is larger than the cross - sectional area of the beams of the end wall.

[0028] As a preferred technical solution of the above - mentioned vehicle body structure, the multiple beams of the framework include an intermediate beam, and side beams for surrounding the outside of the intermediate beam;

[0029] The cross - sectional area of the side beams is larger than the cross - sectional area of the intermediate beam; and / or,

[0030] The intermediate beam includes a first tubular structure, the side beam includes a second tubular structure, and the wall thickness of the first tubular structure is larger than the wall thickness of the second tubular structure.

[0031] To achieve the above object, a rail vehicle is further provided, including the vehicle body structure described in any one of the above.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] For the vehicle body structure and the rail vehicle of the present invention, the vehicle body structure is divided into multiple vehicle body sub - parts. The vehicle body sub - parts are integrally formed by an autoclave molding process or an OOA molding process, which can ensure the dimensions and appearance quality of each vehicle body sub - part, and reduce the manufacturing and assembly difficulty of the composite material vehicle body structure on the basis of achieving lightweight; meanwhile, the beams of the framework are formed by a pultrusion process, which can enable the structural strength of the vehicle body structure formed by connecting multiple vehicle body sub - parts to meet the requirements, ensure the safety performance of the vehicle body structure, and is also beneficial to improving production efficiency; the foaming parts are arranged in the cavities of the framework, which improves the sound insulation and heat insulation performance of the vehicle body sub - parts. It can not only improve the service performance of the vehicle body structure, but also reduce the use of sound insulation and heat insulation materials during the interior decoration of the vehicle body structure, with the effect of reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the vehicle body structure in an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of the underframe in an embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the structure of the roof in an embodiment of the present invention;

[0037] Figure 4 It is a schematic diagram of the structure of the side wall in an embodiment of the present invention;

[0038] Figure 5 It is a schematic diagram of the structure of the end wall in an embodiment of the present invention;

[0039] Figure 6Schematic diagram of the connection relationship between the chassis and the side wall in the embodiment of the present invention;

[0040] Figure 7 Schematic diagram of the connection relationship between the roof and the side wall in the embodiment of the present invention;

[0041] Figure 8 Schematic diagram of the connection relationship between the end wall and the side wall in the embodiment of the present invention;

[0042] Figure 9 Schematic diagram of the connection relationship between the end wall and the roof in the embodiment of the present invention;

[0043] Figure 10 Schematic diagram of the connection relationship between the end wall and the chassis in the embodiment of the present invention;

[0044] Figure 11 Partial cross-sectional view of the chassis in the embodiment of the present invention;

[0045] Figure 12 Partial cross-sectional view of the side wall in the embodiment of the present invention.

[0046] Reference numerals:

[0047] 1a, chassis; 1a1, floor; 1a2, bottom side beam; 1a3, buffer beam; 1b, roof; 1b1, top side longitudinal beam; 1b2, top side cross beam; 1c, side wall; 1c1, lower side beam; 1c2, upper side beam; 1c3, side column; 1d, end wall; 1d1, end side beam; 1d2, end side column; 11, outer skin; 12, inner skin; 13, skeleton; 131, beam; 14, foaming member; 151, bottom decorative layer; 152, side decorative layer; 161, first adjustment gap; 162, second adjustment gap; 163, third adjustment gap; 164, fourth adjustment gap; 171, first connecting member; 172, second connecting member. Detailed implementation manners

[0048] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0050] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0051] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0052] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0054] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the figures, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are only for explaining the present invention and should not be construed as a limitation of the present invention.

[0055] As Figures 1-12As shown in the figure, this embodiment provides a car body structure and a rail vehicle. The rail vehicle includes the car body structure. The car body structure includes a plurality of car body sub - parts, and the plurality of car body sub - parts are connected and enclosed to form an interior space; the car body sub - part includes an outer skin 11 and an inner skin 12, and a framework 13 sandwiched between the outer skin 11 and the inner skin 12. The framework 13 includes a plurality of beams 131, and the beams 131 are formed by pultrusion process. The plurality of beams 131 are connected to form a plurality of compartments, and a foaming member 14 is arranged in the compartments; the outer skin 11, the framework 13, the foaming member 14 and the inner skin 12 of the car body sub - part are integrally formed by autoclave molding process or OOA molding process.

[0056] In the car body structure of the embodiment of the present invention, the car body structure is divided into a plurality of car body sub - parts, and the car body sub - parts are integrally formed by autoclave molding process or OOA molding process, which can ensure the dimensions and appearance quality of each car body sub - part, reduce the manufacturing and assembly difficulty of the composite material car body structure on the basis of realizing lightweight; at the same time, the beams 131 of the framework 13 are formed by pultrusion process, which can make the structural strength of the car body structure formed by connecting a plurality of car body sub - parts meet the requirements, ensure the safety performance of the car body structure, and is also beneficial to improving production efficiency; the foaming member 14 is arranged in the compartments of the framework 13, which improves the sound insulation and heat insulation performance of the car body sub - part. It can not only improve the service performance of the car body structure, but also reduce the use of sound insulation and heat insulation materials during the interior decoration of the car body structure, having the effect of reducing costs.

[0057] Preferably, a foaming member 14 is arranged in each compartment formed by connecting the plurality of beams 131 of the framework 13, and the foaming member 14 is filled in the corresponding compartment. In other words, each compartment is filled with the corresponding foaming member 14, and the sound insulation and heat insulation effects are better. Exemplarily, the foaming member 14 is a foam block. The material of the foaming member 14 in this embodiment is not limited. In other words, the foaming member 14 is made of foaming materials in the prior art.

[0058] Optionally, an adjustment gap is provided between two adjacent car body sub - parts. Thus, it can not only avoid problems such as difficult assembly, too long production cycle, and easy generation of manufacturing defects caused by too large dimensions of each car body sub - part, ensure that the dimensions and tolerances of the assembled car body structure meet the requirements, reduce the manufacturing and assembly difficulty of the car body structure, but also give full play to the advantages of the integrated design of composite materials.

[0059] In the specific embodiment of the present invention, such as Figures 1-5As shown, the multiple vehicle body parts include a underframe 1a, a roof 1b, two side walls 1c, and two end walls 1d. Specifically, the two side walls 1c are arranged at intervals relative to each other in the width direction of the vehicle body structure, the two end walls 1d are arranged at intervals relative to each other in the length direction of the vehicle body structure, the two side walls 1c are both connected to the two end walls 1d, the underframe 1a is connected to the bottom ends of the two side walls 1c and the two end walls 1d, and the roof 1b is connected to the top ends of the two side walls 1c and the two end walls 1d, thereby enclosing an interior space. In other words, the underframe 1a is arranged at the bottom of the interior space, the roof 1b is arranged at the top of the interior space, the two side walls 1c are respectively arranged on both sides of the interior space in the width direction of the vehicle body structure, and the two end walls 1d are respectively arranged on both sides of the interior space in the length direction of the vehicle body structure. The length direction of the vehicle body structure, the width direction of the vehicle body structure, and the height direction of the vehicle body structure are perpendicular to each other in pairs. In other words, the height direction of the vehicle body structure is the vertical direction.

[0060] The vehicle body structure is divided into an underframe 1a, a roof 1b, two side walls 1c, and two end walls 1d, and the underframe 1a, the roof 1b, the side walls 1c, and the end walls 1d are integrally formed by an autoclave molding process or an OOA molding process respectively. Furthermore, the dimensions and appearance quality of the underframe 1a, the roof 1b, the side walls 1c, and the end walls 1d can be guaranteed by the mold. Compared with the prior art, it can not only reduce the processing difficulty, but also facilitate assembly and ensure the assembly dimensions.

[0061] It should be noted that the shapes and dimensions of the underframe 1a, the roof 1b, the side walls 1c, and the end walls 1d are not limited in this embodiment.

[0062] In one embodiment, the outer skin 11, the frame 13, the foam part 14, and the inner skin 12 of the underframe 1a are integrally formed by an autoclave molding process. Compared with the roof 1b, the side walls 1c, and the end walls 1d, the underframe 1a has a higher load-bearing requirement. By integrally forming the outer skin 11, the frame 13, the foam part 14, and the inner skin 12 of the underframe 1a by an autoclave molding process, the structural strength and molding quality of the underframe 1a can be improved, which is beneficial to improving the safety performance of the vehicle body structure.

[0063] An autoclave is a special pressure vessel that can withstand and regulate a certain temperature and pressure range. In this embodiment, when manufacturing the underframe 1a using the autoclave molding process, first lay up the prepreg in a predetermined direction to form the first blank of the composite material, then place the first blank on the underframe 1a mold, and then place the skeleton 13 on the first blank. And put the foam piece 14 into the cavity of the skeleton 13. Then, lay up the prepreg in a predetermined direction on the skeleton 13 to form the second blank of the composite material. Finally, seal the mold in a vacuum bag and put it into the autoclave. Before heating and curing, evacuate the vacuum bag to remove air and volatiles, and then heat up, pressurize and cure according to the curing system of different resins, so that the first blank and the second blank form the outer skin 11 and the inner skin 12 respectively.

[0064] In one embodiment, the outer skin 11, the skeleton 13, the foam piece 14 and the inner skin 12 of the roof 1b are integrally formed by the OOA molding process. Compared with the underframe 1a, the load-bearing requirement of the roof 1b is slightly lower. By integrally forming the outer skin 11, the skeleton 13, the foam piece 14 and the inner skin 12 of the roof 1b by the OOA molding process, the purpose of reducing costs can be achieved on the basis of ensuring that the structural strength and molding quality of the roof 1b meet the requirements.

[0065] In one embodiment, the outer skin 11, the skeleton 13, the foam piece 14 and the inner skin 12 of the side wall 1c are integrally formed by the OOA molding process. Compared with the underframe 1a, the load-bearing requirement of the side wall 1c is slightly lower. By integrally forming the outer skin 11, the skeleton 13, the foam piece 14 and the inner skin 12 of the side wall 1c by the OOA molding process, the purpose of reducing costs can be achieved on the basis of ensuring that the structural strength and molding quality of the side wall 1c meet the requirements.

[0066] In one embodiment, the outer skin 11, the skeleton 13, the foam piece 14 and the inner skin 12 of the end wall 1d are integrally formed by the OOA molding process. Compared with the underframe 1a, the load-bearing requirement of the end wall 1d is slightly lower. By integrally forming the outer skin 11, the skeleton 13 (including the foam piece 14), the foam piece 14 and the inner skin 12 of the end wall 1d by the OOA molding process, the purpose of reducing costs can be achieved on the basis of ensuring that the structural strength and molding quality of the end wall 1d meet the requirements.

[0067] The OOA molding process (Out of Autoclave) is a non-autoclave molding process mainly used for the manufacture of composite materials. This process manufactures composite materials by applying vacuum, pressure and heat outside the autoclave, avoiding the high cost and energy consumption of using an autoclave. That is to say, when manufacturing the roof 1b, the side wall 1c and the end wall 1d using the OOA molding process, except for not using an autoclave, other process flows can be analogous to the autoclave molding process and will not be elaborated here.

[0068] It should be noted that the specific type of composite material used for the underframe 1a, roof 1b, side wall 1c, and end wall 1d in this embodiment is not limited. That is to say, the composite materials used for the underframe 1a, roof 1b, side wall 1c, and end wall 1d in this embodiment are all composite materials in the prior art. Preferably, the composite material used for the underframe 1a, roof 1b, side wall 1c, and end wall 1d is a carbon fiber composite material.

[0069] In one embodiment, the inner skin 12 of the underframe 1a is provided with a bottom decorative layer 151. Thus, it can not only improve the aesthetics of the interior space of the vehicle, but also replace the interior floor 1a1 of the existing rail vehicle through the bottom decorative layer 151, increase the thickness of the underframe 1a, further improve the stiffness, sound insulation, and heat insulation performance of the underframe 1a, and have the effect of reducing costs. Specifically, the bottom decorative layer 151 is provided on the side of the inner skin 12 of the underframe 1a facing the interior space of the vehicle. Exemplarily, a viscoelastic material is sprayed on the side of the inner skin 12 of the underframe 1a facing the interior space of the vehicle to form the above-mentioned bottom decorative layer 151.

[0070] In one embodiment, the inner skin 12 of the side wall 1c is provided with a side decorative layer 152. Thus, it can not only improve the aesthetics of the interior space of the vehicle, but also improve the sound insulation and heat insulation performance of the side wall 1c, and can reduce the use of sound insulation and heat insulation materials during the interior installation of the vehicle body structure to reduce costs. Specifically, the side decorative layer 152 is provided on the side of the inner skin 12 of the side wall 1c facing the interior space of the vehicle. Exemplarily, a viscoelastic material is sprayed on the side of the inner skin 12 of the side wall 1c facing the interior space of the vehicle to form the above-mentioned side decorative layer 152.

[0071] It should be noted that the viscoelastic material is a material in the prior art, such as latex or epoxy resin, etc.

[0072] In one embodiment, a first adjustment gap 161 is provided between the side wall 1c and the roof 1b. Thus, during assembly, by increasing or decreasing the size of the first adjustment gap 161, the deviation between the side wall 1c and the roof 1b can be absorbed, which has the effect of reducing the requirements for dimensions and tolerances of the side wall 1c and the roof 1b, so as to achieve the purpose of reducing the manufacturing and assembly difficulties of the side wall 1c and the roof 1b.

[0073] In one embodiment, a second adjustment gap 162 is provided between the side wall 1c and the end wall 1d. Thus, during assembly, by increasing or decreasing the size of the second adjustment gap 162, the deviation between the side wall 1c and the end wall 1d can be absorbed, which has the effect of reducing the requirements for dimensions and tolerances of the side wall 1c and the end wall 1d, so as to achieve the purpose of reducing the manufacturing and assembly difficulties of the side wall 1c and the end wall 1d.

[0074] In one embodiment, a third adjustment gap 163 is provided between the end wall 1d and the roof 1b. Thus, during assembly, by increasing or decreasing the size of the third adjustment gap 163, the deviation between the end wall 1d and the roof 1b can be absorbed, which has the effect of reducing the requirements for the dimensions and tolerances of the end wall 1d and the roof 1b, so as to achieve the purpose of reducing the manufacturing and assembly difficulties of the end wall 1d and the roof 1b.

[0075] In one embodiment, the underframe 1a includes a floor 1a1, two side sills 1a2, and two buffer beams 1a3. The two side sills 1a2 are respectively connected to both sides of the floor 1a1 along the width direction of the vehicle body structure; the two buffer beams 1a3 are respectively connected to both sides of the floor 1a1 along the length direction of the vehicle body structure, and both of the two buffer beams 1a3 are connected to the two side sills 1a2. That is to say, the two side sills 1a2 and the two buffer beams 1a3 are connected to form an annular bottom frame, and the annular bottom frame is sleeved outside the floor 1a1, thereby having the effect of improving the structural strength of the underframe 1a.

[0076] When connecting the underframe 1a and the side wall 1c, specifically, the side sill 1a2 of the underframe 1a is connected to the bottom end of the side wall 1c. In one embodiment, a fourth adjustment gap 164 is provided between the side sill 1a2 and the floor 1a1. Thus, during assembly, by increasing or decreasing the size of the fourth adjustment gap 164, the deviation between the underframe 1a and the side wall 1c can be absorbed, which has the effect of reducing the requirements for the dimensions and tolerances of the underframe 1a and the side wall 1c, so as to achieve the purpose of reducing the manufacturing and assembly difficulties of the underframe 1a and the side wall 1c.

[0077] It should be noted that the specific values of the first adjustment gap 161, the second adjustment gap 162, the third adjustment gap 163, and the fourth adjustment gap 164 are not limited in this embodiment. Exemplarily, the specific values of the first adjustment gap 161, the second adjustment gap 162, the third adjustment gap 163, and the fourth adjustment gap 164 are known values determined according to experience or multiple repeated tests.

[0078] In one embodiment, the cross-sectional area of the beam 131 of the underframe 1a is larger than the cross-sectional area of the beam 131 of the roof 1b. It can be understood that the load-bearing requirement of the underframe 1a is higher than that of the roof 1b. By making the cross-sectional area of the beam 131 of the underframe 1a larger than the cross-sectional area of the beam 131 of the roof 1b, on the premise that the structural strengths of both the underframe 1a and the roof 1b can meet the requirements, the material used for the beam 131 can be reduced, and the cost can be lowered.

[0079] In one embodiment, the cross-sectional area of the beam 131 of the underframe 1a is larger than that of the beam 131 of the side wall 1c. It can be understood that the load-bearing requirement of the underframe 1a is higher than that of the side wall 1c. By making the cross-sectional area of the beam 131 of the underframe 1a larger than that of the beam 131 of the side wall 1c, the material used for the beam 131 can be reduced and the cost can be lowered on the premise that the structural strengths of both the underframe 1a and the side wall 1c can meet the requirements.

[0080] In one embodiment, the cross-sectional area of the beam 131 of the underframe 1a is larger than that of the beam 131 of the end wall 1d. It can be understood that the load-bearing requirement of the underframe 1a is higher than that of the end wall 1d. By making the cross-sectional area of the beam 131 of the underframe 1a larger than that of the beam 131 of the end wall 1d, the material used for the beam 131 can be reduced and the cost can be lowered on the premise that the structural strengths of both the underframe 1a and the end wall 1d can meet the requirements.

[0081] In one embodiment, the multiple beams 131 of the framework 13 include intermediate beams 131 and side beams 131 for surrounding the outside of the intermediate beams 131; the cross-sectional area of the side beams 131 is larger than that of the intermediate beams 131. It should be noted that during assembly, usually the side beams 131 of two adjacent vehicle body parts are connected. By making the cross-sectional area of the side beams 131 larger than that of the intermediate beams 131, it has the effect of improving the structural strength of the side beams 131, and thus can improve the connection reliability between multiple vehicle body parts and the safety performance of the vehicle body structure.

[0082] It should be noted that for any beam 131, the cross-section of the beam 131 is a section perpendicular to the extending direction of the beam 131.

[0083] In one embodiment, the intermediate beam 131 includes a first tubular structure, and the side beam 131 includes a second tubular structure. The wall thickness of the first tubular structure is larger than that of the second tubular structure. Since during assembly, usually the side beams 131 of two adjacent vehicle body parts are connected. By making the wall thickness of the first tubular structure larger than that of the second tubular structure, it has the effect of improving the structural strength of the side beams 131, and thus can improve the connection reliability between multiple vehicle body parts and the safety performance of the vehicle body structure.

[0084] It should be noted that in this embodiment, the shapes and dimensions of the cross-sections of the beams 131 of the underframe 1a, the roof 1b, the side wall 1c, and the end wall 1d are not limited.

[0085] It can be understood that multiple beams 131 of the framework 13 intersect and are fixedly connected to form partition cavities between adjacent multiple beams 131. Exemplarily, multiple beams 131 of the framework 13 are connected by fasteners such as bolts. As an alternative, multiple beams 131 of the framework 13 can also be connected by mortise and tenon structures. The connection method of multiple beams 131 of the framework 13 in this embodiment is not limited.

[0086] Specifically, multiple beams 131 of the underframe 1a include the above-mentioned bottom side beams 1a2 and buffer beams 1a3, as well as multiple bottom cross beams extending in the width direction of the vehicle body structure and multiple bottom longitudinal beams extending in the length direction of the vehicle body structure; multiple bottom cross beams and multiple bottom longitudinal beams are both located within the annular bottom frame formed by the connection of two bottom side beams 1a2 and two buffer beams 1a3.

[0087] Furthermore, multiple beams 131 of the roof 1b include multiple top cross beams extending in the width direction of the vehicle body structure and multiple top longitudinal beams extending in the length direction of the vehicle body structure; along the width direction of the vehicle body structure, the outermost top longitudinal beam is the top side longitudinal beam 1b1; along the length direction of the vehicle body structure, the outermost top cross beam is the top side cross beam 1b2.

[0088] Furthermore, multiple beams 131 of the side wall 1c include multiple side cross beams extending in the length direction of the vehicle body structure and multiple side columns extending in the height direction of the rail vehicle; along the height direction of the vehicle body structure, the outermost side cross beam is the side beam (including the lower side beam 1c1 and the upper side beam 1c2); along the length direction of the vehicle body structure, the outermost side column is the side column 1c3.

[0089] Furthermore, multiple beams 131 of the end wall 1d include multiple end cross beams extending in the width direction of the vehicle body structure and multiple end columns extending in the height direction of the vehicle body structure; along the height direction of the vehicle body structure, the outermost end cross beam is the end side beam 1d1; along the width direction of the vehicle body structure, the outermost end column is the end side column 1d2. In this embodiment, the roof 1b is an arc-shaped roof. Therefore, both the top cross beam and the end side beam 1d1 are curved beams. It should be noted that the end wall 1d also includes a door frame. Exemplarily, the door frame is made by connecting an end cross beam and two end columns respectively connected to both ends of the end cross beam.

[0090] In one embodiment, the shapes and sizes of the cross-sections of the top cross beam, the top longitudinal beam, the end cross beam, and the end column are the same. That is to say, the cross-sections of the top cross beam, the top longitudinal beam, the end cross beam, and the end column are completely the same, and the cross-sections of the top cross beam, the top longitudinal beam, the end cross beam, and the end column can be interchanged. Furthermore, the top cross beam, the top longitudinal beam, the end cross beam, and the end column can be manufactured using the same mold, reducing the number of molds required for the pultrusion process and lowering the production cost.

[0091] In one embodiment, the cross-sections of the side beams and the bottom beams have the same shape and dimensions. That is to say, the cross-sections of the side beams and the bottom beams are exactly the same, and the cross-sections of the side beams and the bottom beams can be interchanged. Thus, the same mold can be used to manufacture the side beams and the bottom beams, reducing the number of molds required for the pultrusion process and lowering the production cost.

[0092] In one embodiment, the inner sides of two adjacent vehicle body parts are connected by a connecting member, which can strengthen the two adjacent vehicle body parts through the connecting member and is beneficial to improving the rigidity of the vehicle body structure.

[0093] For the sake of convenience of description, the two adjacent vehicle body parts are respectively denoted as the first vehicle body part and the second vehicle body part.

[0094] In one embodiment, at one end where the first vehicle body part is adjacent to the second vehicle body part, the outer skin 11 and the inner skin 12 of the first vehicle body part are connected as a whole, and the outer skin 11 and the inner skin 12 of the first vehicle body part cover the connection between the first vehicle body part and the second vehicle body part, thereby improving the airtightness and aesthetics of the vehicle body structure. Preferably, the outer skin 11 of the first vehicle body part completely covers the connection between the first vehicle body part and the second vehicle body part, and the outer skin 11 of the first vehicle body part is connected to the second vehicle body part.

[0095] In one embodiment, at one end where the second vehicle body part is adjacent to the first vehicle body part, the outer skin 11 and the inner skin 12 of the second vehicle body part are connected as a whole, and the outer skin 11 and the inner skin 12 of the second vehicle body part cover the connection between the first vehicle body part and the second vehicle body part, thereby improving the airtightness and aesthetics of the vehicle body structure. Preferably, the inner skin 12 of the second vehicle body part completely covers the connection between the first vehicle body part and the second vehicle body part, and the inner skin 12 of the second vehicle body part is connected to the first vehicle body part.

[0096] Specifically, the outer skin 11 and the inner skin 12 of the first vehicle body part connected as a whole and the outer skin 11 and the inner skin 12 of the second vehicle body part connected as a whole are respectively located on both sides of the connection between the first vehicle body part and the second vehicle body part, and the airtightness is better.

[0097] In a specific embodiment of the present invention, as Figure 6 shown, for the underframe 1a and the side wall 1c, on the inner side of the vehicle body structure, the bottom side beam 1a2 of the underframe 1a is connected to the lower side beam 1c1 of the side wall 1c; on the outer side of the vehicle body structure, the outer skin 11 of the side wall 1c is connected to the bottom side beam 1a2 of the underframe 1a; further, at one end where the side wall 1c is adjacent to the underframe 1a, the outer skin 11 and the inner skin 12 of the side wall 1c are connected as a whole and cover the connection between the bottom side beam 1a2 of the underframe 1a and the lower side beam 1c1 of the side wall 1c, thereby improving the airtightness of the vehicle body structure.

[0098] Furthermore, as Figure 7 shown, for the roof 1b and the side wall 1c, on the inner side of the car body structure, the upper side sill 1c2 of the side wall 1c is connected to the top side longitudinal beam 1b1 of the roof 1b; on the outer side of the car body structure, at one end where the roof 1b is adjacent to the side wall 1c, the outer skin 11 and the inner skin 12 of the roof 1b are connected as a whole and connected to the upper side sill 1c2 of the side wall 1c. A first adjustment gap 161 is provided between the side wall 1c and the car body to ensure the dimensions and tolerances after the overall assembly of the car body structure.

[0099] Furthermore, as Figure 8 shown, for the end wall 1d and the side wall 1c, on the inner side of the car body structure, the side column 1c3 of the side wall 1c is connected to the end column 1d2 of the end wall 1d through a first connecting member 171; on the outer side of the car body structure, at one end where the side wall 1c is adjacent to the end wall 1d, the outer skin 11 and the inner skin 12 of the side wall 1c are connected as a whole and connected to the end column 1d2 of the end wall 1d. A second adjustment gap 162 is provided between the side wall 1c and the end wall 1d to ensure the dimensions and tolerances after the overall assembly of the car body structure. Exemplarily, the first connecting member 171 is of a right-angled structure and has higher strength.

[0100] Furthermore, as Figure 9 shown, for the end wall 1d and the roof 1b, on the inner side of the car body structure, the top cross beam 1b2 of the roof 1b is connected to the end beam 1d1 of the end wall 1d; on the outer side of the car body structure, at one end where the roof 1b is adjacent to the end wall 1d, the outer skin 11 and the inner skin 12 of the roof 1b are connected as a whole and connected to the end beam 1d1 of the end wall 1d. A third adjustment gap 163 is provided between the roof 1b and the end wall 1d to ensure the dimensions and tolerances after the overall assembly of the car body structure.

[0101] Furthermore, as Figure 10 shown, for the end wall 1d and the underframe 1a, on the inner side of the car body structure, the buffer beam 1a3 of the underframe 1a is connected to the inner skin 12 of the end wall 1d through a second connecting member 172; on the outer side of the car body structure, at one end where the end wall 1d is adjacent to the underframe 1a, the outer skin 11 and the inner skin 12 of the end wall 1d are connected as a whole and connected to the buffer beam 1a3 of the underframe 1a; further, at one end where the end wall 1d is adjacent to the underframe 1a, the outer skin 11 and the inner skin 12 of the end wall 1d are connected as a whole and cover the connection between the buffer beam 1a3 of the underframe 1a and the end wall 1d, thereby improving the airtightness of the car body structure. Exemplarily, the second connecting member 172 is of a right-angled structure and has higher strength.

[0102] Furthermore, as Figure 11As shown, in the direction from the inner side to the outer side of the vehicle body structure, the floor 1a1 of the underframe 1a includes a viscoelastic material layer, an inner skin 12, a framework 13, a foaming member 14 disposed in the cavity of the framework 13, and an outer skin 11 that are sequentially connected. Through the foaming member 14 inside the underframe 1a and the viscoelastic material layer on the inner surface of the underframe 1a, the sound insulation and heat insulation performance of the underframe 1a are improved, and at the same time, the thickness of the underframe 1a is increased, thereby replacing the existing interior floor 1a1 of the vehicle body structure, not only reducing the cost but also improving the stiffness of the underframe 1a.

[0103] Furthermore, as Figure 12 shown, in the direction from the inner side to the outer side of the vehicle body structure, the side wall 1c includes a viscoelastic material layer, an inner skin 12, a framework 13, a foaming member 14 disposed in the cavity of the framework 13, and an outer skin 11 that are sequentially connected. Through the foaming member 14 inside the side wall 1c and the viscoelastic material layer on the inner surface of the side wall 1c, the sound insulation and heat insulation performance of the side wall 1c are improved, reducing the use of sound insulation and heat insulation materials in the interior part of the vehicle body structure and lowering the cost.

[0104] Note that the above is only the preferred embodiment of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A vehicle body structure, characterized in that: It includes multiple body parts, which are connected and surrounded to form an interior space; the body parts include an outer skin and an inner skin, and a skeleton sandwiched between the outer skin and the inner skin, the skeleton includes multiple beams, and the beams are formed by a pultrusion process, and multiple beams are connected to form multiple compartments, and foam parts are arranged in the compartments; the outer skin, the skeleton, the foam parts and the inner skin of the body parts are integrally formed by a hot autoclave molding process or an OOA molding process.

2. The vehicle body structure according to claim 1, characterized in that: An adjustment gap is provided between two adjacent vehicle body sections.

3. The vehicle body structure according to claim 1, characterized in that: The multiple body parts include a chassis, a roof, two side walls arranged relatively spaced apart along the width direction of the body structure, and two end walls arranged relatively spaced apart along the length direction of the body structure, the two side walls are connected to the two end walls, the chassis is connected to the bottom ends of the two side walls and the two end walls, and the roof is connected to the top ends of the two side walls and the two end walls to enclose and form the interior space of the vehicle.

4. The vehicle body structure according to claim 3, characterized in that: A first adjustment gap is provided between the side wall and the roof; and / or, A second adjustment gap is provided between the side wall and the end wall; and / or, A third adjustment gap is provided between the end wall and the roof.

5. The vehicle body structure according to claim 4, characterized in that: The base frame comprises: floor; Two bottom side beams, the two bottom side beams are respectively connected to two sides of the floor along the width direction of the vehicle body structure; Two buffer beams are respectively connected to two sides of the floor along the length direction of the vehicle body structure, and both of the two buffer beams are connected to the two bottom side beams.

6. The vehicle body structure according to claim 5, characterized in that: The bottom side beam of the base frame is connected to the bottom end of the side wall, and a fourth adjustment gap is provided between the bottom side beam and the floor.

7. The vehicle body structure according to claim 1, characterized in that: The multiple body parts include a roof arranged at the top of the vehicle interior space, and an end wall arranged at one side of the vehicle interior space along the length direction of the vehicle body structure, the multiple beams of the roof include a top cross beam extending along the width direction of the vehicle body structure, and a top longitudinal beam extending along the length direction of the vehicle body structure, and the multiple beams of the end wall include an end cross beam extending along the width direction of the vehicle body structure, and an end column extending along the height direction of the vehicle body structure; the cross-section of the top cross beam, the cross-section of the top longitudinal beam, the cross-section of the end cross beam, and the cross-section of the end column are all the same in shape and size; and / or, The multiple body parts include a base frame arranged at the bottom of the vehicle interior space, and a side wall arranged on one side of the vehicle interior space along the width direction of the vehicle body structure. The multiple beams of the side wall include a side cross beam extending along the length direction of the vehicle body structure, and the multiple beams of the base frame include a bottom cross beam extending along the width direction of the vehicle body structure; the cross-section of the side cross beam and the cross-section of the bottom cross beam are the same in shape and size.

8. The vehicle body structure according to claim 1, characterized in that: The plurality of vehicle body parts include a chassis arranged at the bottom of the vehicle interior space, and the inner skin of the chassis is provided with a bottom decorative layer; and / or, The plurality of vehicle body sections include a side wall arranged at one side of the vehicle interior space along the width direction of the vehicle body structure, and the inner skin of the side wall is provided with a side decorative layer.

9. The vehicle body structure according to claim 1, characterized in that: The plurality of vehicle body parts include a chassis arranged at the bottom of the vehicle interior space, and the outer skin, the frame, the foamed part and the inner skin of the chassis are integrally formed by an autoclave molding process; and / or, The plurality of vehicle body parts include a roof disposed at the top of the vehicle interior space, wherein the outer skin, the frame, the foaming part and the inner skin of the roof are integrally formed by an OOA molding process; and / or, The plurality of vehicle body sections include a side wall provided on one side of the vehicle interior space along the width direction of the vehicle body structure, wherein the outer skin, the frame, the foaming part and the inner skin of the side wall are integrally formed by an OOA molding process; and / or, The multiple body parts include an end wall arranged at one end of the interior space of the vehicle along the length direction of the body structure, and the outer skin, the frame, the foam part and the inner skin of the end wall are integrally formed through the OOA molding process.

10. The vehicle body structure according to any one of claims 1 to 9, characterized in that: The plurality of vehicle body sections include a bottom frame disposed at the bottom of the vehicle interior space, and a roof disposed at the top of the vehicle interior space, wherein the cross-sectional area of ​​the beam of the bottom frame is greater than the cross-sectional area of ​​the beam of the roof; and / or, The plurality of vehicle body sections include a chassis disposed at the bottom of the vehicle interior space, and a side wall disposed at one side of the vehicle interior space along the width direction of the vehicle body structure, wherein the cross-sectional area of ​​the beam of the chassis is greater than the cross-sectional area of ​​the beam of the side wall; and / or, The multiple body parts include a base frame arranged at the bottom of the vehicle interior space, and an end wall arranged at one side of the vehicle interior space along the length direction of the vehicle body structure, and the cross-sectional area of ​​the beam of the base frame is larger than the cross-sectional area of ​​the beam of the end wall.

11. The vehicle body structure according to claim 10, characterized in that: The plurality of beams of the frame include a middle beam and side beams arranged around the outside of the middle beam; The cross-sectional area of ​​the side beam is greater than the cross-sectional area of ​​the middle beam; and / or, The middle beam comprises a first tubular structure, and the side beam comprises a second tubular structure, wherein the wall thickness of the first tubular structure is greater than the wall thickness of the second tubular structure.

12. A rail vehicle, characterized in that: Comprising a vehicle body structure as described in any one of claims 1-11.

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