A vehicle body and a rail vehicle

Abstract

The utility model discloses a kind of car body and railway vehicle, it is related to railway vehicle technical field, car body includes mutually perpendicular side wall and end wall, first bending plate is fixedly connected between side wall and end wall;Second bending plate is fixedly connected between first bending plate and side wall, first bending plate, second bending plate and side wall three form first closed cavity;Third bending plate is fixedly connected between first bending plate and end wall, first bending plate, third bending plate and end wall three form second closed cavity.Closed cavity is formed between side wall and end wall and enclosed two independent, constitute complete closed section, provide continuous transmission path for resisting shear flow generated by torsional load, so that closed section compared with open section has higher torsional rigidity, maximum limit inhibits the distortion of car body, guarantee the structural stability of car body, to improve the running safety of whole car.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle technology, and in particular to a car body and a rail vehicle. Background Technology

[0002] The body of a modern rail vehicle mainly consists of four parts: the roof, side walls, end walls, and underframe. To meet the design requirements of lightweighting, high strength, and high rigidity, the roof and side walls are generally made of extruded aluminum alloy profiles and are rigidly connected by welding to form a ring structure to withstand and transmit the complex loads generated during operation.

[0003] When a vehicle passes through a curve, or when the car body between the two bogies twists due to track irregularities, the car body is subjected to a large torque. However, the side walls and end walls are directly connected, failing to form an effective closed loop, resulting in local open sections. When subjected to torque, the stress cannot form an efficient continuous shear flow loop, leading to extremely poor torsional stiffness. This directly affects the overall stiffness of the car body, thus impacting the overall operational safety of the vehicle. Utility Model Content

[0004] The purpose of this utility model is to provide a car body and rail vehicle in which multiple bending plates are added to the side walls and end walls to form two independent closed cavities, which effectively suppresses the torsional deformation of the car body, ensures the structural stability of the car body, and improves the overall operational safety of the vehicle.

[0005] To achieve the above objectives, this utility model provides a vehicle body, including mutually perpendicular side walls and end walls, with a first bent plate fixedly connected between the side walls and the end walls;

[0006] A second bent plate is fixedly connected between the first bent plate and the side wall, and the first bent plate, the second bent plate, and the side wall together form a first closed cavity.

[0007] A third bent plate is fixedly connected between the first bent plate and the end wall, and the first bent plate, the third bent plate, and the end wall together form a second closed cavity.

[0008] In some embodiments, the first bending plate, the second bending plate, and the third bending plate are all Z-shaped structures;

[0009] The first bent plate includes a first longitudinal connecting plate, a first transverse connecting plate, and a first extended connecting plate that are connected vertically in sequence; the second bent plate includes a second longitudinal connecting plate, a second transverse transition plate, and a second extended connecting plate that are connected vertically in sequence; the third bent plate includes a third longitudinal connecting plate, a third transverse transition plate, a third longitudinal transition plate, and a third extended connecting plate that are connected vertically in sequence.

[0010] The first longitudinal connecting plate is fixedly connected to the second longitudinal connecting plate and the third longitudinal connecting plate on both sides respectively; the first transverse connecting plate is fixedly connected to the end wall; the first extension connecting plate is fixedly connected to the side wall; the first longitudinal connecting plate, the first transverse connecting plate, the side wall, and the second transverse transition plate are connected in sequence to form a first closed cavity.

[0011] The second extension connecting plate is fixedly connected to the side wall; the third extension connecting plate is fixedly connected to the end wall; the third transverse transition plate, the third longitudinal transition plate, the end wall and the first longitudinal connecting plate are connected in sequence to form a second closed cavity.

[0012] In some embodiments, a side wall end reinforcement plate is fixedly provided at the end of the side wall away from the end wall, and the side wall end reinforcement plate has an L-shaped structure;

[0013] The sidewall end reinforcement plate includes a longitudinal sidewall reinforcement plate fixedly connected to the side of the sidewall away from the end wall and a transverse sidewall extension plate perpendicular to the longitudinal sidewall reinforcement plate, the transverse sidewall extension plate being bent and extended toward the end wall.

[0014] In some embodiments, a base frame perpendicular to the side wall is also included, and a fourth bent plate is fixedly connected between the side wall and the base frame. The fourth bent plate has an L-shaped structure.

[0015] The base frame is fixed with side reinforcing plates on both sides. The side reinforcing plates are U-shaped. The side reinforcing plates include a longitudinal reinforcing plate and an upper transverse extension plate and a lower transverse extension plate that are perpendicularly connected to the longitudinal reinforcing plate. The longitudinal reinforcing plate is attached to the outer side of the base frame, the upper transverse extension plate is attached to the top side of the base frame, and the lower transverse extension plate is attached to the bottom side of the base frame.

[0016] The fourth bending plate includes a fourth vertical connecting plate fixedly connected to the side reinforcing plate of the base frame and a fourth transverse connecting plate fixedly connected to the side wall. The fourth vertical connecting plate is attached to the longitudinal reinforcing plate of the base frame, and the fourth transverse connecting plate is parallel to the upper transverse extension plate and the two are spaced apart.

[0017] In some embodiments, the vehicle roof is also connected to the side wall and the end wall respectively, and a fifth bent plate is fixedly connected between the side wall, the end wall and the vehicle roof;

[0018] The fifth bending plate includes a fifth vertical extension plate, a fifth longitudinal connecting plate, a fifth vertical connecting plate and a fifth longitudinal extension plate connected in sequence. The fifth vertical extension plate is fixedly connected to the internal reinforcing rib of the end wall. The sides of both the fifth longitudinal connecting plate and the fifth vertical connecting plate are fixedly connected to the side wall. The side of the roof facing the end wall is provided on the roof longitudinal extension plate, and the fifth longitudinal extension plate is fixedly connected to the roof longitudinal extension plate.

[0019] The side wall facing the roof protrudes to form a top reinforcing rib, which has a U-shaped structure. The top reinforcing rib, the roof, the fifth vertical connecting plate, and the fifth longitudinal connecting plate are connected in sequence to form a third closed cavity.

[0020] In some embodiments, a roof top reinforcing plate is fixed on the side of the roof longitudinal extension plate away from the fifth longitudinal extension plate, and the roof top reinforcing plate has an L-shaped structure.

[0021] The roof top reinforcement plate includes a roof longitudinal reinforcement plate that is attached to the roof longitudinal extension plate and a roof vertical extension plate that is perpendicular to the roof longitudinal reinforcement plate. The roof vertical extension plate bends and extends toward the end wall.

[0022] In some embodiments, a sixth bent plate is fixedly connected between the side beam of the roof and the side wall;

[0023] The side beam includes a side reinforcing plate, a side lap plate that overlaps with the end wall, and an inclined reinforcing plate that is inclined between the side reinforcing plate and the side lap plate.

[0024] The sixth bending plate includes a sixth vertical connecting plate, a sixth transverse transition plate, and a sixth vertical extension plate connected in sequence. The sixth vertical connecting plate is attached to the side lap plate, and the sixth vertical extension plate is attached to the side reinforcing plate. The sixth vertical extension plate, the sixth transverse transition plate, the side lap plate, and the inclined reinforcing plate are connected in sequence to form a fourth closed cavity.

[0025] In some embodiments, at least one roof reinforcement area and at least one roof mounting area are formed on the outer side of the roof; in the longitudinal direction of the vehicle body, the roof mounting area is located between two adjacent roof reinforcement areas;

[0026] The outer side of the roof reinforcement area is provided with several outer reinforcement ribs extending longitudinally along the vehicle body, and all the outer reinforcement ribs are evenly distributed along the transverse side of the vehicle body; the inner side of the roof reinforcement area is provided with several inner reinforcement ribs extending transversely along the vehicle body, and all the inner reinforcement ribs are evenly distributed along the longitudinal side of the vehicle body, and each inner reinforcement rib is an arc-shaped structure protruding towards the outer side of the vehicle body.

[0027] The inner sides of the roof mounting area are provided with several reinforcing ribs extending laterally along the vehicle body. All the reinforcing ribs are distributed longitudinally along the vehicle body. At least one auxiliary reinforcing rib is fixedly connected between any two adjacent reinforcing ribs. The roof mounting area forms at least one through roof mounting hole. The inner and outer sides of the roof mounting hole are provided with roof hole reinforcing ribs.

[0028] In some embodiments, a reinforcement zone installation gap is formed between any two adjacent outer protruding ribs of the reinforcement zone; at least one mounting seat is fixedly provided on the roof, each mounting seat includes at least two mounting support legs, and each mounting support leg is fixedly disposed within the reinforcement zone installation gap.

[0029] This utility model also provides a rail vehicle, including the aforementioned car body.

[0030] Compared with the prior art, the present invention optimizes the connection method between the side wall and the end wall. After optimization, a first bent plate is fixedly connected between the side wall and the end wall; a second bent plate is fixedly connected between the first bent plate and the side wall, and the first bent plate, the second bent plate and the side wall together form a first closed cavity; a third bent plate is fixedly connected between the first bent plate and the end wall, and the first bent plate, the third bent plate and the end wall together form a second closed cavity.

[0031] Therefore, the side walls and end walls enclose two independent closed cavities, forming a complete closed cross-section, providing a continuous transmission path for the shear flow generated by torsional loads. From a mechanical perspective, when the vehicle body is subjected to torque, a shear stress flow will circulate along the closed cross-section in the cross-sectional wall, effectively transferring the shear stress within the cross-section. This results in the closed cross-section having higher torsional stiffness compared to the open cross-section, maximizing the suppression of torsional deformation of the vehicle body, ensuring the structural stability of the vehicle body, and thus improving the overall operational safety of the vehicle. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 A schematic diagram of the vehicle body provided in an embodiment of this utility model;

[0034] Figure 2 for Figure 1 Cross-sectional view of the connection between the middle side wall and the end wall;

[0035] Figure 3 for Figure 1 Schematic diagram of the transverse section;

[0036] Figure 4 for Figure 3 A magnified view of part A in the image;

[0037] Figure 5 for Figure 3 A magnified view of part B in the image;

[0038] Figure 6 for Figure 1 A longitudinal section diagram;

[0039] Figure 7 for Figure 6 A local part of C;

[0040] Figure 8 for Figure 1 A schematic diagram of the roof of the central vehicle;

[0041] Figure 9 for Figure 1 A frontal view of the reinforced area on the roof of the vehicle;

[0042] Figure 10 for Figure 9 A diagram of the back of the building;

[0043] Figure 11 for Figure 1 Another frontal view of the reinforced area on the roof of the vehicle;

[0044] Figure 12 for Figure 11 A diagram of the back of the building;

[0045] Figure 13 for Figure 1 A frontal view of the installation area on the roof of the vehicle;

[0046] Figure 14 for Figure 13 A diagram of the back of the building;

[0047] Figure 15 for Figure 8 A magnified view of a portion of the image.

[0048] The attached figures are labeled as follows:

[0049] Side wall 1, end wall 2, first bent plate 3, second bent plate 4, first enclosed cavity 5, third bent plate 6, second enclosed cavity 7, side wall end reinforcing plate 8, base frame 9, fourth bent plate 10, base frame side reinforcing plate 11, roof 12, fifth bent plate 13, roof longitudinal extension plate 14, side wall top reinforcing rib 15, third enclosed cavity 16, roof top reinforcing plate 17, sixth bent plate 18, fourth enclosed cavity 19 and mounting base 20;

[0050] First longitudinal connecting plate 31, first transverse connecting plate 32 and first extension connecting plate 33;

[0051] Second longitudinal connecting plate 41, second transverse transition plate 42, and second extension connecting plate 43;

[0052] The third longitudinal connecting plate 61, the third transverse transition plate 62, the third longitudinal transition plate 63, and the third extension connecting plate 64;

[0053] Side wall longitudinal reinforcing plate 81 and side wall transverse extension plate 82;

[0054] The fourth vertical connecting plate 101 and the fourth horizontal connecting plate 102;

[0055] The base frame longitudinal reinforcing plate 111 and the upper transverse extension plate 112;

[0056] Side beam 121, roof reinforcement area 122 and roof mounting area 123, roof mounting hole 124 and reinforcement area mounting gap 125;

[0057] Side reinforcing plate 1211, side overlapping plate 1212 and inclined reinforcing plate 1213;

[0058] External reinforcing rib 1221 and internal reinforcing rib 1222 of the reinforcing zone;

[0059] Inner reinforcing rib 1231 of the installation area and auxiliary reinforcing rib 1232 of the installation area;

[0060] Roof hole reinforcing rib 1241;

[0061] Fifth vertical extension plate 131, fifth longitudinal connecting plate 132, fifth vertical connecting plate 133 and fifth longitudinal extension plate 134;

[0062] The roof longitudinal reinforcement plate 171 and the roof vertical extension plate 172;

[0063] The sixth vertical connecting plate 181, the sixth horizontal transition plate 182, and the sixth vertical extension plate 183. Detailed Implementation

[0064] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0065] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] First, it should be noted that the longitudinal direction of the vehicle body in the text refers to the length direction of the vehicle body, that is, the X-axis direction in the figure; the lateral direction refers to the width direction of the vehicle body, that is, the Y-axis direction in the figure; and the vertical direction refers to the height direction of the vehicle body, that is, the Z-axis direction in the figure.

[0067] This utility model discloses a vehicle body, as shown in the attached figure. Figure 1 As shown, the vehicle body includes two side walls 1 and two end walls 2 that are perpendicular to each other. Specifically, the vehicle body includes two side walls 1 and two end walls 2. The two side walls 1 are parallel to each other, and the two end walls 2 are respectively provided at both ends.

[0068] As attached Figure 2 As shown, a first bent plate 3 is fixedly connected between the side wall 1 and the end wall 2; a second bent plate 4 is fixedly connected between the first bent plate 3 and the side wall 1, and the first bent plate 3, the second bent plate 4, and the side wall 1 together form a first closed cavity 5; a third bent plate 6 is fixedly connected between the first bent plate 3 and the end wall 2, and the first bent plate 3, the third bent plate 6, and the end wall 2 together form a second closed cavity 7. Preferably, both the first closed cavity 5 and the second closed cavity 7 are rectangular cavities.

[0069] The side wall 1 and end wall 2 enclose two independent closed cavities, forming a complete closed section that provides a continuous transmission path for the shear flow generated by torsional loads. From a mechanical perspective, when the vehicle body is subjected to torque, a shear stress flow will circulate along the closed section in the section wall, effectively transmitting the shear stress within the section. This results in the closed section having higher torsional stiffness compared to the open section, maximizing the suppression of torsional deformation of the vehicle body, ensuring the structural stability of the vehicle body, and thus improving the overall operational safety of the vehicle.

[0070] In addition, besides improving the rigidity of the vehicle body, the two independent enclosed cavities also have sound insulation properties, effectively suppressing vibration transmission, reducing structural noise, and improving the overall comfort of the vehicle.

[0071] As a preferred embodiment, the first bending plate 3, the second bending plate 4, and the third bending plate 6 are all Z-shaped structures, which are easy to standardize and manufacture, reduce the difficulty of processing and assembly, facilitate integration with other parts of the vehicle body, and enhance the manufacturability.

[0072] The first bent plate 3 includes a first longitudinal connecting plate 31, a first transverse connecting plate 32, and a first extension connecting plate 33 connected vertically in sequence; the second bent plate 4 includes a second longitudinal connecting plate 41, a second transverse transition plate 42, and a second extension connecting plate 43 connected vertically in sequence; the third bent plate 6 includes a third longitudinal connecting plate 61, a third transverse transition plate 62, a third longitudinal transition plate 63, and a third extension connecting plate 64 connected vertically in sequence.

[0073] The first longitudinal connecting plate 31 is fixedly connected to the second longitudinal connecting plate 41 and the third longitudinal connecting plate 61 on both sides respectively; the first transverse connecting plate 32 is fixedly connected to the end wall 2; the first extension connecting plate 33 is fixedly connected to the side wall 1; the first longitudinal connecting plate 31, the first transverse connecting plate 32, the side wall 1, and the second transverse transition plate 42 are connected in sequence to form a first closed cavity 5. This cavity directly connects the side wall 1 and the end wall 2 with the first bending plate 3, providing strong internal transverse support for the side wall 1 and preventing it from bulging.

[0074] The second extension connecting plate 43 is fixedly connected to the side wall 1; the third extension connecting plate 64 is fixedly connected to the end wall 2; the third transverse transition plate 62, the third longitudinal transition plate 63, the end wall 2 and the first longitudinal connecting plate 31 are connected in sequence to form a second closed cavity 7. This cavity structure is deeper and effectively resists the out-of-plane deformation of the end wall 2, especially when the vehicle is subjected to longitudinal impact.

[0075] This utility model utilizes three Z-shaped bent plates to form a three-dimensional truss structure, which effectively solves the problem of abrupt stiffness change at the connection between the side wall 1 and the end wall 2, realizes multi-path load diversion, and efficiently absorbs collision energy, meeting the design requirements of lightweight, high strength and high safety.

[0076] As a preferred embodiment, a side wall end reinforcement plate 8 is fixedly provided at the end of the side wall 1 away from the end wall 2. The side wall end reinforcement plate 8 has an L-shaped structure, which enhances the stiffness and bending resistance of the free edge of the side wall 1 and prevents it from warping or local deformation under load.

[0077] Specifically, the side wall end reinforcement plate 8 includes a side wall longitudinal reinforcement plate 81 fixedly connected to the side of the side wall 1 away from the end wall 2 and a side wall transverse extension plate 82 perpendicular to the side wall longitudinal reinforcement plate 81. The side wall transverse extension plate 82 bends and extends laterally toward the end wall 2 along the vehicle body.

[0078] As a preferred embodiment, as shown in the appendix Figure 3 As shown, the vehicle body also includes a chassis 9 perpendicular to the side wall 1. A fourth bending plate 10 is fixed between the side wall 1 and the chassis 9. The fourth bending plate 10 has an L-shaped structure. When the vehicle body starts or brakes and generates a large longitudinal load, the fourth bending plate 10 effectively diverts part of the longitudinal load to the side wall 1, so that the side wall 1 also participates in bearing the longitudinal load, reducing the burden on the chassis 9 and achieving a better load distribution.

[0079] The base frame 9 is fixed with side reinforcing plates 11 on both sides. The side reinforcing plates 11 have a U-shaped structure, which wrap around the edges of the base frame 9 to improve the deformation resistance of the base frame 9. The side reinforcing plates 11 include a longitudinal reinforcing plate 111 and an upper transverse extension plate 112 and a lower transverse extension plate that are perpendicularly connected to the longitudinal reinforcing plate 111. The longitudinal reinforcing plate 111 is attached to the outer side of the base frame 9, the upper transverse extension plate 112 is attached to the top side of the base frame 9, and the lower transverse extension plate is attached to the bottom side of the base frame 9.

[0080] The fourth bending plate 10 is connected to the side reinforcing plate 11 of the base frame. The load from the side wall 1 is transmitted through the fourth bending plate 10 and then directly to the side reinforcing plate 11 of the base frame. This allows the load to spread longitudinally along the side reinforcing plate 11 of the base frame and be quickly distributed to the longitudinal direction of the entire base frame 9. This avoids excessive local stress and helps to extend the service life of the base frame 9, thereby improving the service life of the entire structure.

[0081] Specifically, the fourth bending plate 10 includes a fourth vertical connecting plate 101 fixedly connected to the side reinforcing plate 11 of the underframe and a fourth transverse connecting plate 102 fixedly connected to the side wall 1. The fourth vertical connecting plate 101 is attached to the longitudinal reinforcing plate 111 of the underframe, and the fourth transverse connecting plate 102 is parallel to the upper transverse extension plate 112 and the two are spaced apart, so that the fourth vertical connecting plate 101, the fourth transverse connecting plate 102, the side wall 1 and the upper transverse extension plate 112 together form a new closed cavity, which improves the torsional stiffness at the connection between the underframe 9 and the side wall 1. Compared with the existing overlapping connection, it is beneficial to further improve the structural stability of the vehicle body.

[0082] As a preferred embodiment, as shown in the appendix Figure 6 As shown, the vehicle body also includes a roof 12 connected to the side wall 1 and the end wall 2 respectively. A fifth bending plate 13 is fixedly connected between the side wall 1, the end wall 2 and the roof 12. When the vehicle body is subjected to torsional load, the deformation of the roof 12 is transmitted to the node of the side wall 1 and the end wall 2 through the fifth bending plate 13, and then to the underframe 9, so that the vehicle body maintains structural stability.

[0083] Specifically, as shown in the attached document Figure 7As shown, the fifth bending plate 13 includes a fifth vertical extension plate 131, a fifth longitudinal connecting plate 132, a fifth vertical connecting plate 133, and a fifth longitudinal extension plate 134 connected in sequence. The fifth vertical extension plate 131 is fixedly connected to the internal reinforcing rib of the end wall 2. The sides of both the fifth longitudinal connecting plate 132 and the fifth vertical connecting plate 133 are fixedly connected to the side wall 1. The side of the roof 12 facing the end wall 2 is provided with the longitudinal extension plate 14 of the roof 12. The fifth longitudinal extension plate 134 is fixedly connected to the longitudinal extension plate 14 of the roof 12. The huge load from the roof 12 is distributed to the side wall 1 through the fifth bending plate 13, which effectively reduces the stress at the connection between the side wall 1 and the roof 12, thereby extending the fatigue life of the vehicle body.

[0084] The side wall 1 protrudes towards the roof 12, forming a top reinforcing rib 15. The U-shaped structure of the top reinforcing rib 15 enhances the bending capacity of the top of the side wall 1, providing a solid foundation for the installation of the roof 12. The top reinforcing rib 15, the roof 12, the fifth vertical connecting plate 133, and the fifth longitudinal connecting plate 132 are sequentially connected to form a third closed cavity 16, ensuring efficient transmission of force from the roof 12 to the chassis 9, improving the torsional stiffness at the connection between the roof 12 and the side wall 1, and thus enhancing the structural stability of the vehicle body.

[0085] As a preferred embodiment, a roof top reinforcing plate 17 is fixed on the side of the longitudinal extension plate 14 of the roof 12 away from the fifth longitudinal extension plate 134. The roof top reinforcing plate 17 has an L-shaped structure, which enhances the rigidity and bending resistance of the free edge of the roof 12, prevents it from warping or local deformation under load, eliminates stress concentration at the edge of the roof 12, and improves the fatigue strength of the edge of the roof 12.

[0086] Specifically, the roof top reinforcing plate 17 includes a roof longitudinal reinforcing plate 171 that is attached to the roof longitudinal extension plate 14 and a roof vertical extension plate 172 that is perpendicular to the roof longitudinal reinforcing plate 171. The roof vertical extension plate 172 bends and extends along the vertical direction of the vehicle body toward the end wall 2.

[0087] As a preferred embodiment, as shown in the appendix Figure 5 As shown, a sixth bent plate 18 is fixed between the side beam 121 of the roof 12 and the side wall 1, so that the load borne by the roof 12 is transmitted downward through the side beam 121 and then evenly to the side wall 1 through the sixth bent plate 18, instead of letting the load all rush to the fifth bent plate 13, avoiding excessive stress concentration at the corner nodes, making the stress distribution more uniform, and effectively improving the fatigue life of the corner nodes.

[0088] The side beam 121 includes a side reinforcing plate 1211, a side overlapping plate 1212 that overlaps and connects with the end wall 2, and an inclined reinforcing plate 1213 that is inclinedly connected between the side reinforcing plate 1211 and the side overlapping plate 1212. The side reinforcing plate 1211 has a circular arc structure.

[0089] The sixth bending plate 18 includes a sixth vertical connecting plate 181, a sixth transverse transition plate 182, and a sixth vertical extension plate 183 connected in sequence. The sixth vertical connecting plate 181 is attached to the side overlapping plate 1212, and the sixth vertical extension plate 183 is attached to the side reinforcing plate 1211. The sixth vertical extension plate 183, the sixth transverse transition plate 182, the side overlapping plate 1212, and the inclined reinforcing plate 1213 are connected in sequence to form a fourth closed cavity 19. This closed cavity is arranged at the connection between the roof 12 and the side wall 1, thereby improving the torsional stiffness at the connection, effectively resisting the opening or compression tendency between the roof 12 and the side wall 1, and also helping to improve the structural stability of the vehicle body.

[0090] As a preferred embodiment, as shown in the appendix Figure 8 As shown, the outer surface of the roof 12 has at least one roof reinforcement area 122 and at least one roof mounting area 123. In the longitudinal direction of the vehicle body, the roof mounting area 123 is located between two adjacent roof reinforcement areas 122, enabling the roof 12 to achieve reasonable functional zoning. The roof reinforcement area 122, as a high-rigidity support frame, provides the main longitudinal and lateral stiffness for the entire roof 12 and plays a key role in transmitting the overall load. The roof mounting area 123, on the other hand, serves as a functional platform specifically designed to bear and distribute concentrated loads from the top equipment. Placing the mounting area between the two reinforcement areas means that the mounting area can directly rely on the solid reinforcement areas on both sides as its boundary support, thereby transferring the force borne by the mounting point to the main load-bearing structure through the shortest path, avoiding stress concentration in non-reinforced areas, and making the material distribution more reasonable. While ensuring the overall structural strength and stiffness, it also achieves a lightweight design for the roof 12.

[0091] As attached Figures 9 to 12 As shown, the outer side of the roof reinforcement area 122 is provided with a number of reinforcement outer ribs 1221 extending longitudinally along the vehicle body. All reinforcement outer ribs 1221 are evenly distributed along the transverse direction of the vehicle body, which can efficiently transfer and disperse the longitudinal load from the front and rear directions of the vehicle body, and are used to bear the overall bending stiffness of the vehicle body.

[0092] The inner side of the roof reinforcement area 122 is fixed with a number of inner reinforcement ribs 1222 extending laterally along the vehicle body. All the inner reinforcement ribs 1222 are evenly distributed along the longitudinal direction of the vehicle body, serving as a transverse skeleton. They complement the outer protruding ribs 1221 of the reinforcement area and together divide the roof 12 into numerous small plates, which greatly restricts the degree of freedom of deformation of the roof 12 under pressure and is used to resist the local buckling of the roof 12.

[0093] The outer reinforcing ribs 1221 and the inner reinforcing ribs 1222 of the reinforcing area are staggered, forming an orthogonal grid-like reinforcing structure on both the inner and outer sides of the roof 12, effectively improving the overall rigidity of the roof 12 under complex loads. Each inner reinforcing rib 1222 is an arc-shaped structure protruding towards the outer side of the vehicle body. Compared with straight ribs, it can provide stronger bending load-bearing capacity with a lighter weight, thereby effectively improving the local bending and dent resistance of the roof 12 in both longitudinal and vertical directions.

[0094] In addition, as attached Figure 13 and 14 As shown, several reinforcing ribs 1231 extending laterally along the vehicle body are provided between the inner surfaces of the roof mounting area 123. All reinforcing ribs 1231 are distributed longitudinally along the vehicle body, enhancing the bending stiffness of the roof mounting area 123 in both longitudinal and lateral dimensions, preventing local indentation or instability deformation under stress. At least one auxiliary reinforcing rib 1232 is fixedly connected between any two adjacent reinforcing ribs 1231, forming a dense grid-like reinforcement structure, thereby effectively suppressing vibration and enhancing the local stiffness and load-bearing capacity of the roof mounting area 123. The roof mounting area 123 forms at least one through roof mounting hole 124 for fixing external devices such as air conditioners. Roof mounting hole 124 opening is reinforced with roof hole opening ribs 1241 on both the inner and outer sides of the opening, effectively dispersing the concentrated force acting on the mounting hole, reducing stress concentration at the hole edge, preventing cracks due to fatigue damage, and ensuring the structural integrity and long-term reliability of the roof mounting hole 124.

[0095] As a preferred embodiment, as shown in the appendix Figure 15 As shown, a reinforcing zone installation gap 125 is formed between any two adjacent outer protruding ribs 1221 of the reinforcing zone; the roof 12 is fixedly provided with at least one mounting seat 20, each mounting seat 20 including at least two mounting support legs, each mounting support leg being fixed in the reinforcing zone installation gap 125, that is, the mounting support leg is embedded and fixed in the reinforcing zone installation gap 125, which is equivalent to directly transferring the load on the mounting point to the outer protruding rib 1221 of the reinforcing zone, reducing local stress, and enhancing the anti-overturning and anti-torsion ability of the mounting seat 20 itself, ensuring the connection stability of the mounting seat 20.

[0096] Specifically, the mounting base 20 includes a wire frame mounting base 20, a pantograph mounting base 20, a surge arrester mounting base 20, and an equipment mounting base 20, which are used to install wire harnesses, pantographs, surge arresters, and equipment on the roof 12, respectively.

[0097] This utility model also provides a rail vehicle, including the aforementioned car body, which has the same beneficial effects.

[0098] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0099] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A vehicle body, characterized in that, It includes mutually perpendicular side walls and end walls, and a first bent plate is fixedly connected between the side walls and the end walls; A second bent plate is fixedly connected between the first bent plate and the side wall, and the first bent plate, the second bent plate, and the side wall together form a first closed cavity; A third bent plate is fixedly connected between the first bent plate and the end wall, and the first bent plate, the third bent plate and the end wall together form a second closed cavity.

2. The vehicle body according to claim 1, characterized in that, The first bent plate, the second bent plate, and the third bent plate are all Z-shaped structures; The first bent plate includes a first longitudinal connecting plate, a first transverse connecting plate, and a first extended connecting plate connected vertically in sequence; the second bent plate includes a second longitudinal connecting plate, a second transverse transition plate, and a second extended connecting plate connected vertically in sequence; the third bent plate includes a third longitudinal connecting plate, a third transverse transition plate, a third longitudinal transition plate, and a third extended connecting plate connected vertically in sequence. The first longitudinal connecting plate is fixedly connected to the second longitudinal connecting plate and the third longitudinal connecting plate on both sides respectively; the first transverse connecting plate is fixedly connected to the end wall; the first extension connecting plate is fixedly connected to the side wall; the first longitudinal connecting plate, the first transverse connecting plate, the side wall, and the second transverse transition plate are sequentially connected to form the first closed cavity; The second extension connecting plate is fixedly connected to the side wall; the third extension connecting plate is fixedly connected to the end wall; the third transverse transition plate, the third longitudinal transition plate, the end wall and the first longitudinal connecting plate are sequentially connected to form the second closed cavity.

3. The vehicle body according to claim 2, characterized in that, A side wall end reinforcement plate is fixedly provided at the end of the side wall away from the end wall, and the side wall end reinforcement plate has an L-shaped structure; The sidewall end reinforcement plate includes a longitudinal sidewall reinforcement plate fixedly connected to the side of the sidewall away from the end wall and a transverse sidewall extension plate perpendicular to the longitudinal sidewall reinforcement plate, wherein the transverse sidewall extension plate bends and extends toward the end wall.

4. The vehicle body according to claim 1, characterized in that, It also includes a base frame perpendicular to the side wall, and a fourth bent plate is fixedly connected between the side wall and the base frame. The fourth bent plate has an L-shaped structure. The base frame is fixed with side reinforcing plates on both sides, and the side reinforcing plates are U-shaped. The side reinforcing plates include a longitudinal reinforcing plate and an upper transverse extension plate and a lower transverse extension plate that are perpendicularly connected to the longitudinal reinforcing plate. The longitudinal reinforcing plate is attached to the outer side of the base frame, the upper transverse extension plate is attached to the top side of the base frame, and the lower transverse extension plate is attached to the bottom side of the base frame. The fourth bending plate includes a fourth vertical connecting plate fixedly connected to the side reinforcing plate of the base frame and a fourth transverse connecting plate fixedly connected to the side wall. The fourth vertical connecting plate is attached to the longitudinal reinforcing plate of the base frame, and the fourth transverse connecting plate is parallel to the upper transverse extension plate and the two are spaced apart.

5. The vehicle body according to claim 1, characterized in that, It also includes a vehicle roof that is connected to the side wall and the end wall respectively, and a fifth bent plate is fixedly connected between the side wall, the end wall and the vehicle roof; The fifth bending plate includes a fifth vertical extension plate, a fifth longitudinal connecting plate, a fifth vertical connecting plate, and a fifth longitudinal extension plate connected in sequence. The fifth vertical extension plate is fixedly connected to the internal reinforcing rib of the end wall. The sides of both the fifth longitudinal connecting plate and the fifth vertical connecting plate are fixedly connected to the side wall. The side of the roof facing the end wall is provided on the roof longitudinal extension plate, and the fifth longitudinal extension plate is fixedly connected to the roof longitudinal extension plate. The side wall protrudes towards the roof and forms a top reinforcing rib, which has a U-shaped structure. The top reinforcing rib, the roof, the fifth vertical connecting plate, and the fifth longitudinal connecting plate are sequentially connected to form a third closed cavity.

6. The vehicle body according to claim 5, characterized in that, A roof top reinforcing plate is fixed on the side of the roof longitudinal extension plate away from the fifth longitudinal extension plate, and the roof top reinforcing plate has an L-shaped structure. The roof top reinforcing plate includes a roof longitudinal reinforcing plate that is attached to the roof longitudinal extension plate and a roof vertical extension plate that is perpendicular to the roof longitudinal reinforcing plate. The roof vertical extension plate bends and extends toward the end wall.

7. The vehicle body according to claim 5, characterized in that, A sixth bent plate is fixedly connected between the side beam of the roof and the side wall; The side beam includes a side reinforcing plate, a side overlapping plate that overlaps and connects with the end wall, and an inclined reinforcing plate that is inclinedly connected between the side reinforcing plate and the side overlapping plate. The sixth bending plate includes a sixth vertical connecting plate, a sixth transverse transition plate, and a sixth vertical extension plate connected in sequence. The sixth vertical connecting plate is attached to the side overlapping plate, and the sixth vertical extension plate is attached to the side reinforcing plate. The sixth vertical extension plate, the sixth transverse transition plate, the side overlapping plate, and the inclined reinforcing plate are connected in sequence to form a fourth closed cavity.

8. The vehicle body according to claim 5, characterized in that, The outer surface of the roof has at least one roof reinforcement area and at least one roof mounting area; in the longitudinal direction of the vehicle body, the roof mounting area is located between two adjacent roof reinforcement areas; The outer side of the roof reinforcement area is provided with a plurality of outer reinforcement ribs extending longitudinally along the vehicle body, and all of the outer reinforcement ribs are evenly distributed transversely along the vehicle body; the inner side of the roof reinforcement area is provided with a plurality of inner reinforcement ribs extending transversely along the vehicle body, and all of the inner reinforcement ribs are evenly distributed longitudinally along the vehicle body, and each inner reinforcement rib is an arc-shaped structure protruding toward the outer side of the vehicle body. The inner sides of the roof mounting area are provided with a number of inner reinforcing ribs extending laterally along the vehicle body. All the inner reinforcing ribs of the mounting area are distributed longitudinally along the vehicle body. At least one auxiliary reinforcing rib of the mounting area is fixedly connected between any two adjacent inner reinforcing ribs of the mounting area. The roof mounting area forms at least one through roof mounting hole. The inner and outer sides of the opening of the roof mounting hole are respectively provided with roof opening reinforcing ribs.

9. The vehicle body according to claim 8, characterized in that, A reinforcement zone installation gap is formed between any two adjacent outer protruding ribs of the reinforcement zone; at least one mounting seat is fixedly provided on the roof, each mounting seat includes at least two mounting support legs, and each mounting support leg is fixedly provided within the reinforcement zone installation gap.

10. A rail vehicle, characterized in that, Includes the vehicle body as described in any one of claims 1 to 9.

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