Vehicle body structure and vehicle

Abstract

The utility model belongs to the technical field of automobile design and manufacturing, and particularly relates to a vehicle body structure and a vehicle. The vehicle body structure comprises an upper vehicle body provided with a first column; the lower vehicle body comprises a front bin longitudinal beam, a front cross beam, two torsion boxes and a floor assembly, each torsion box comprises a torsion box body, a first connecting part, a second connecting part, a third connecting part and a fourth connecting part, and the first connecting parts, the second connecting parts, the third connecting parts and the fourth connecting parts are connected with the torsion box bodies. The front cabin longitudinal beam is detachably connected to the second connecting part of the torsion box, the floor assembly is detachably connected to the third connecting part of the torsion box, and the first column (A column) is detachably connected to the fourth connecting part of the torsion box. By applying the technical scheme, the problems that in the prior art, after a front cabin longitudinal beam and a torsion box have a front collision accident, maintenance and repair work is very difficult, the work efficiency of maintenance and repair is low, and the cost is high are solved.

Description

Technical Field

[0001] This application belongs to the technical field of automotive design and manufacturing, and particularly relates to a vehicle body structure and a vehicle. Background Art

[0002] In the vehicle body structures of related technologies, in order to increase the anti-collision stress and energy absorption and collapse functions of a vehicle during a frontal collision accident, a torque box can be provided between the floor assembly of the lower vehicle body and the front cabin longitudinal beam. In this way, during a frontal collision accident, the torque box can strengthen the anti-collision stress and energy absorption and collapse functions of the vehicle, thereby better protecting the safety of the passengers in the vehicle, especially the safety of the front-row passengers.

[0003] During a frontal collision accident, the front cabin longitudinal beam and the torque box are collided, and then the front cabin longitudinal beam and the torque box are collapsed and deformed to absorb the collision energy, and the collision energy is reduced as much as possible from being transmitted to the front-row passengers to protect the safety of the front-row passengers.

[0004] However, in related technologies, the torque box is generally fixed by welding or riveting in the vehicle body structure, and the torque box is non-removable. In this way, after a frontal collision accident occurs, the collapsed and deformed front cabin longitudinal beam and torque box need to be cut, and then a new front cabin longitudinal beam and a new torque box are fixed by welding or riveting again to repair the vehicle. In this way, after a frontal collision accident occurs, the repair work of the front cabin longitudinal beam and the torque box will be very difficult, and the repair work efficiency is low and the cost is high. Utility Model Content

[0005] The purpose of this application is to provide a vehicle body structure and a vehicle, aiming to solve the problems of difficult repair and low repair work efficiency of the front cabin longitudinal beam and the torque box in related technologies after a frontal collision accident occurs.

[0006] To achieve the above object, according to the first aspect of this application, the technical solution adopted is: A vehicle body structure, comprising:

[0007] An upper vehicle body, including a first pillar (A pillar);

[0008] A lower vehicle body, including a front cabin longitudinal beam, a front cross beam, a torque box and a floor assembly. The torque box includes a torque box main body and a first connecting portion, a second connecting portion, a third connecting portion and a fourth connecting portion connected to the torque box main body. The two ends of the front cross beam are respectively connected to the first connecting portions of two torque boxes. The front cabin longitudinal beam is detachably connected to the second connecting portion of the torque box. The floor assembly is detachably connected to the third connecting portion of the torque box. The first pillar (A pillar) is detachably connected to the fourth connecting portion of the torque box.

[0009] In some embodiments of the present application, the front cabin longitudinal beam is connected to the second connecting portion of the torque box through the first bolt-nut pair, the floor assembly is connected to the third connecting portion of the torque box through the second bolt-nut pair, and the first pillar (A-pillar) is connected to the fourth connecting portion of the torque box through the third bolt-nut pair.

[0010] For a vehicle assembled and formed by applying the vehicle body structure provided by the embodiments of the present application, when a frontal collision accident occurs during driving, the frontal collision energy acts on the front cabin longitudinal beam and the torque box, causing the front cabin longitudinal beam and the torque box to undergo crush deformation. During the repair process of the vehicle body structure, since the second connecting portion of the front cabin longitudinal beam and the torque box is detachably connected through the first bolt-nut pair, the third connecting portion of the floor assembly and the torque box is detachably connected through the second bolt-nut pair, and the fourth connecting portion of the first pillar (A-pillar) of the upper vehicle body and the torque box is detachably connected through the third bolt-nut pair, therefore, only by loosening and removing the first bolt-nut pair, the front cabin longitudinal beam can be detached from the torque box, and only by removing the second bolt-nut pair and the third bolt-nut pair, the torque box can be detached from the first pillar (A-pillar) of the upper vehicle body and the floor assembly. Then, a new front cabin longitudinal beam and a new torque box are replaced, and the first bolt-nut pair, the second bolt-nut pair, and the third bolt-nut pair are locked accordingly again, and the repair of the front cabin longitudinal beam and the torque box deformed and damaged due to the frontal collision accident can be completed. In this way, the difficulty of the repair work of the front cabin longitudinal beam and the torque box is reduced, thereby improving the work efficiency of repairing the front cabin longitudinal beam and the torque box, and also reducing the cost of repairing the front cabin longitudinal beam and the torque box.

[0011] In some embodiments of the present application, the upper vehicle body has a first contact surface, the front cross beam, the floor assembly, and two torque boxes form a second contact surface, and the first contact surface and the second contact surface are arranged opposite to each other; the vehicle body structure further includes a sealing ring, and the sealing ring is clamped between the first contact surface and the second contact surface to form a sealed setting between the first contact surface and the second contact surface. By providing the sealing ring, the vehicle body structure is divided into a dry area and a wet area, that is, the inside and the outside of the carriage are distinguished, and the inside of the carriage can be kept dry and isolated from the outside of the carriage.

[0012] In some embodiments of the present application, the number of the third bolt-nut pairs is multiple, wherein, a part of the third bolt-nut pairs is located inside the sealing ring, and another part of the third bolt-nut pairs is located outside the sealing ring, that is, multiple third bolt-nut pairs are respectively located on both sides of the sealing ring. In this way, both sides of the sealing ring are evenly squeezed, enabling the sealing ring to undergo elastic deformation evenly, so as to better achieve the sealed setting between the first contact surface and the second contact surface.

[0013] In some embodiments of the present application, the number of the third bolt-nut pairs located inside the sealing ring is more than that of the third bolt-nut pairs located outside the sealing ring. On the premise of ensuring that both sides of the sealing ring can be evenly squeezed by the first contact surface and the second contact surface, and ensuring the connection strength between the first pillar (A-pillar) of the upper vehicle body and the fourth connection part of the torsion box, the number of bolt-nut pairs located outside the carriage is minimized as much as possible, and a larger number of bolt-nut pairs are correspondingly designed to be located inside the carriage, reducing the number of bolt-nut pairs that are difficult to disassemble. Moreover, the bolt-nut pairs located inside the carriage are hardly affected by erosion and are relatively convenient to disassemble, thereby improving the efficiency of detaching the torsion box from the first pillar (A-pillar) of the upper vehicle body.

[0014] In some embodiments of the present application, the number of the third bolt-nut pairs located inside the sealing ring is four, and the four third bolt-nut pairs are arranged at intervals along the extending direction of the sealing ring. This can not only ensure that the torsion box itself has high mechanical strength, but also ensure the connection strength between the first pillar (A-pillar) of the upper vehicle body and the torsion box.

[0015] In some embodiments of the present application, the floor assembly includes two sill beams arranged oppositely, and the end parts of the two sill beams are detachably connected to the third connection parts of the two torsion boxes respectively, which can improve the working efficiency of repairing the torsion box.

[0016] In some embodiments of the present application, the third connection part of the torsion box has a first overlapping side wall, and the end part of the sill beam overlaps on the first overlapping side wall and is then connected through a second bolt-nut pair.

[0017] In some embodiments of the present application, the second connection part of the torsion box is arranged as a plug-in cylinder structure, and the end part of the front compartment longitudinal beam is inserted into the plug-in cylinder structure and then connected through a first bolt-nut pair.

[0018] In some embodiments of the present application, the fourth connection part of the torsion box has a second overlapping side wall, and the end part of the first pillar abuts against the second overlapping side wall and is then connected through a third bolt-nut pair.

[0019] In some embodiments of the present application, both ends of the front cross beam are welded and fixed to the first connection parts of the two torsion boxes respectively; or both ends of the front cross beam are riveted and fixed to the first connection parts of the two torsion boxes respectively. In this way, the mechanical strength of the front end part of the lower vehicle body is improved; or both ends of the front cross beam are connected to the first connection parts of the two torsion boxes through bolt-nut pairs, so that the torsion box can be disassembled separately.

[0020] In some embodiments of the present application, the body structure further includes a front bulkhead, and the torsion box is further provided with a fifth connection part, and the front bulkhead is detachably connected to the fifth connection part, which is beneficial to improving the working efficiency of repairing the front bulkhead.

[0021] In some embodiments of the present application, the upper body further includes a second pillar (B pillar), and the second pillar (B pillar) is detachably connected to the sill beam. The disassembly work of disassembling and separating the upper body from the lower body is convenient and fast.

[0022] In some embodiments of the present application, the second pillar (B pillar) is connected to the sill beam by a fourth bolt-nut pair. The disassembly work of disassembling and separating the upper body from the lower body is convenient and fast.

[0023] According to the second aspect of the present application, a vehicle is provided. The vehicle includes the body structure as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 Schematic diagram of the upper body of the body structure according to the embodiment of the present application;

[0026] Figure 2 Schematic diagram of the lower body of the body structure according to the embodiment of the present application;

[0027] Figure 3 For Figure 2 Enlarged schematic diagram at position A in

[0028] Figure 4 Assembly schematic diagram of the front compartment longitudinal beam, front cross beam, torsion box and sealing ring in the lower body of the body structure according to the embodiment of the present application;

[0029] Figure 5 For Figure 4 Left view of

[0030] Figure 6 For Figure 5 Enlarged schematic diagram at position B in

[0031] Figure 7 Schematic diagram of the vehicle according to the embodiment of the present application.

[0032] Among them, the reference numerals in the drawings are as follows:

[0033] 10. Upper body; 11. First pillar; 12. First contact surface; 13. Second pillar; 14. Third pillar; 15. Floor panel;

[0034] 20. Lower vehicle body; 21. Front cabin longitudinal beam; 22. Front cross beam; 23. Torque box; 231. First connection part; 232. Second connection part; 2321. Insertion cylinder structure; 233. Third connection part; 2331. First overlapping side wall; 234. Fourth connection part; 2341. Second overlapping side wall; 235. Fifth connection part; 236. Torque box main body; 24. Floor assembly; 241. Threshold beam; 242. Seat cross beam; 243. Floor

[0035] 40. Sealing ring

[0036] 100. Vehicle

[0037] 110. Driving motor; 120. Battery; 130. Wheel Detailed implementation mode

[0038] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 therefore should not be construed as limiting the present application.

[0040] In addition, the terms "first", "second", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0041] In the present application, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] With the continuous improvement of people's material living quality, the frequency of people using cars for transportation has gradually increased, thus driving the continuous development of the automotive industry. The growth and development of new energy electric vehicles have been particularly significant in recent years, covering vehicle types such as family cars for daily travel, buses for short-distance passenger transportation, rail trains for long-distance passenger transportation, and small trucks for short-distance freight transportation. Among them, the development momentum of new energy electric vehicles (hereinafter simply referred to as electric vehicles, and in a narrow sense, electric vehicles refer to family cars for daily travel) has been particularly rapid, and the market share of electric vehicles in the automotive market has been increasing year by year.

[0043] When a vehicle has a frontal collision accident during driving, the collision energy will be transmitted from front to back along the front longitudinal beam, torque box, floor assembly, etc. Therefore, the first to resist the frontal collision energy is the front longitudinal beam, then the torque box, and then the floor assembly. In order to protect the safety of the front-row passengers as much as possible when a frontal collision accident occurs, in the design of the vehicle body structure, it should be ensured that as much of the frontal collision energy as possible is absorbed by the front longitudinal beam and the torque box, and even the front longitudinal beam and the torque box can completely absorb all the frontal collision energy, and as much as possible to prevent the frontal collision energy from being transmitted to the floor assembly and causing harm to the front-row passengers.

[0044] After a frontal collision accident occurs, the front longitudinal beam and the torque box will undergo crush deformation due to absorbing the frontal collision energy. In order for the vehicle to continue to be driven and used, it is necessary to repair the front longitudinal beam and the torque box.

[0045] In the related art, the torque box is generally fixed by welding or riveting in the vehicle body structure, and the torque box is not detachable. Thus, after a frontal collision accident occurs, the crushed and deformed front longitudinal beam and torque box need to be cut, and then a new front longitudinal beam and a new torque box are fixed by welding or riveting again to repair the vehicle. In this way, after a frontal collision accident occurs, it will lead to very difficult repair work for the front longitudinal beam and the torque box, and the repair work efficiency is low and the cost is high.

[0046] Based on the above considerations, the embodiments of the present application provide a vehicle body structure and a vehicle having the vehicle body structure. For a vehicle assembled and formed using the vehicle body structure provided by the present application, it can simplify the repair difficulty of the front longitudinal beam and the torque box, thereby improving the repair work efficiency of the front longitudinal beam and the torque box, and can also reduce the repair cost of the front longitudinal beam and the torque box.

[0047] Such as Figures 1 to 6As shown in the figure, the embodiments of the present application provide a vehicle body structure. Among them, the vehicle body structure includes an upper vehicle body 10 and a lower vehicle body 20, and the vehicle body structure is assembled and formed by an up-and-down splicing and assembly method. The upper vehicle body 10 includes a first pillar 11 (A-pillar). The lower vehicle body 20 includes a front cabin longitudinal beam 21, a front cross beam 22, a torque box 23, and a floor assembly 24. The torque box 23 includes a torque box main body 236 and a first connecting portion 231, a second connecting portion 232, a third connecting portion 233, and a fourth connecting portion 234 connected to the torque box main body 236. When assembling and manufacturing the vehicle body structure, both ends of the front cross beam 22 are respectively connected to the first connecting portions 231 of two torque boxes 23, the front cabin longitudinal beam 21 is detachably connected to the second connecting portion 232 of the torque box 23, the floor assembly 24 is detachably connected to the third connecting portion 233 of the torque box 23, and the first pillar 11 (A-pillar) is detachably connected to the fourth connecting portion 234 of the torque box 23.

[0048] Specifically, in some embodiments of the present application, the front cabin longitudinal beam 21 is detachably connected to the second connecting portion 232 of the torque box 23 through a first bolt-nut pair, the floor assembly 24 is detachably connected to the third connecting portion 233 of the torque box 23 through a second bolt-nut pair, and the first pillar 11 (A-pillar) is detachably connected to the fourth connecting portion 234 of the torque box 23 through a third bolt-nut pair.

[0049] In some other embodiments of the present application, between the front cabin longitudinal beam 21 and the second connecting portion 232 of the torque box 23, between the floor assembly 24 and the third connecting portion 233 of the torque box 23, and between the first pillar 11 (A-pillar) and the fourth connecting portion 234 of the torque box 23, other detachable connection methods other than bolt-nut pairs can also be used for connection, as long as the connection strength requirements of the vehicle body structure can be ensured.

[0050] For a vehicle formed by assembling and molding the body structure provided in the embodiments of the present application, when a frontal collision accident occurs during driving, the frontal collision energy acts on the front cabin longitudinal beam 21 and the torque box 23, causing the front cabin longitudinal beam 21 and the torque box 23 to undergo crush deformation. During the process of repairing and restoring the body structure of the vehicle, since the second connecting portion 232 of the front cabin longitudinal beam 21 and the torque box 23 is detachably connected by a first bolt and nut pair, the third connecting portion 233 of the floor assembly 24 and the torque box 23 is detachably connected by a second bolt and nut pair, and the fourth connecting portion 234 of the first pillar 11 (A-pillar) of the upper body 10 and the torque box 23 is detachably connected by a third bolt and nut pair, therefore, simply loosening and removing the first bolt and nut pair can detach the front cabin longitudinal beam 21 from the torque box 23, and simply removing the second bolt and nut pair and the third bolt and nut pair can detach the torque box 23 from the first pillar 11 (A-pillar) and the floor assembly 24 of the upper body 10. Then, replacing the damaged front cabin longitudinal beam 21 and the torque box 23 with new ones and re-locking the first bolt and nut pair, the second bolt and nut pair, and the third bolt and nut pair accordingly can complete the repair of the front cabin longitudinal beam 21 and the torque box 23 damaged and deformed due to the frontal collision accident. In this way, the difficulty of repairing the front cabin longitudinal beam 21 and the torque box 23 is reduced, thereby improving the work efficiency of repairing the front cabin longitudinal beam 21 and the torque box 23, and also reducing the cost of repairing the front cabin longitudinal beam 21 and the torque box 23 (mainly but not limited to saving the time cost and labor cost of straightening and repairing the damaged and deformed front cabin longitudinal beam 21 and torque box 23).

[0051] In fact, when a frontal collision accident occurs, the following situations may exist:

[0052] In the first situation, it is a relatively minor frontal collision accident, and only the front cabin longitudinal beam 21 undergoes crush deformation to completely absorb the frontal collision energy. At this time, during the subsequent repair work, simply loosening and removing the first bolt and nut pair can detach the front cabin longitudinal beam 21 damaged and deformed due to the frontal collision accident from the torque box 23, and then replacing and assembling a new front cabin longitudinal beam 21 can complete the repair of the front cabin longitudinal beam 21 damaged and deformed due to the frontal collision accident;

[0053] In the second case, it is a slightly more serious frontal collision accident, which causes the front cabin longitudinal beam 21 and the torque box 23 to both undergo buckling deformation, so as to completely absorb the frontal collision energy. At this time, in the subsequent repair work, it is necessary to replace the new front cabin longitudinal beam 21 and the new torque box 23 at the same time. That is, not only the first bolt-nut pair needs to be loosened and disassembled, but also the second bolt-nut pair and the third bolt-nut pair need to be disassembled, so as to disassemble the front cabin longitudinal beam 21 and the torque box 23 that are deformed and damaged due to the frontal collision accident, and then replace and assemble the new front cabin longitudinal beam 21 and the new torque box 23, and the front cabin longitudinal beam 21 and the torque box 23 that are deformed and damaged due to the frontal collision accident can be repaired and restored;

[0054] In the third case, it is a relatively serious frontal collision accident. Not only the front cabin longitudinal beam 21 and the torque box 23 both undergo buckling deformation, but also the frontal collision energy continues to be transmitted backward, resulting in the floor assembly 24 also undergoing buckling deformation. At this time, the safety of the front row occupants will be affected, and moreover, the body structure is severely damaged, resulting in the body structure having lost the necessity of repair. For this situation, the vehicle generally adopts the scrapping treatment method.

[0055] Wherein:

[0056] The upper body 10 refers to the sheet metal shell of the carriage. The upper body 10 includes the body door frame and the carriage ceiling. Generally, the sheet metal shell is integrally formed by stamping process, so that the upper body 10 has good integrity and high mechanical strength;

[0057] The lower body 20 refers to the components of the vehicle located below the upper body 10. The lower body 20 is composed of the front cabin longitudinal beam 21, the torque box 23, the floor assembly 24, the trunk assembly, the driving system assembly and other corresponding components. In the body structure provided by the embodiment of the present application, the upper body 10 covers the lower body 20, and the upper body 10 and the lower body 20 are spliced and assembled by the detachable connection method of the bolt-nut pair. Therefore, the upper body 10 and the lower body 20 can be separated and disassembled from each other by disassembling the corresponding bolt-nut pair;

[0058] The difference between the design structure of the torque box 23 adopted in the present application and the torque box in the related technology is that the connecting part of the torque box 23 for connecting with other structures is improved to adopt the connecting part structure form locked by the bolt-nut pair. The rest of the structure of the torque box 23 can be substantially the same as the torque box structure in the related technology, and will not be elaborated here.

[0059] In some embodiments of the present application, the lower vehicle body 20 includes four torque boxes 23, and the four torque boxes 23 are respectively located at the four corner positions of the floor assembly 24 one by one. That is, in the traveling direction of the vehicle, the front cabin longitudinal beam 21 and the floor assembly 24 are assembled and fixed through two torque boxes 23 (these two torque boxes 23 can be called the front-end torque boxes), and the trunk assembly and the floor assembly 24 are assembled and fixed through the other two torque boxes 23 (these two torque boxes 23 can be called the rear-end torque boxes), and the two rear-end torque boxes are connected by a rear cross beam. In addition, the upper vehicle body 10 is also provided with two third pillars 14 (C pillars), and the two third pillars 14 (C pillars) are respectively detachably connected and fixed to the two rear-end torque boxes through bolt-nut pairs, and the two first pillars 11 (A pillars) of the upper vehicle body 10 are respectively detachably connected and fixed to the two front-end torque boxes through third bolt-nut pairs.

[0060] In some embodiments of the present application, as Figure 1 and Figure 2 shown, the upper vehicle body 10 is also provided with a first contact surface 12. That is, the circumferential opening edge of the integrally stamped upper vehicle body 10 facing the lower vehicle body 20 forms a circumferential first contact surface 12. Correspondingly, the front cross beam 22, the floor assembly 24 and the two torque boxes 23 form a second contact surface. When the upper vehicle body 10 and the lower vehicle body 20 are covered, the first contact surface 12 and the second contact surface are arranged opposite to each other. In addition, the body structure further includes a sealing ring 40, and the sealing ring 40 is clamped between the first contact surface 12 and the second contact surface. That is, after the upper vehicle body 10 and the lower vehicle body 20 are locked and fixed through corresponding bolt-nut pairs, the first contact surface 12 and the second contact surface squeeze the sealing ring 40 to cause elastic deformation of the sealing ring 40, and then the sealing ring 40 elastically deformed by extrusion makes a sealing arrangement between the first contact surface 12 and the second contact surface. In this way, by providing the sealing ring 40, the body structure is divided into a dry area and a wet area, that is, the inside and the outside of the carriage are distinguished, and the inside of the carriage can be guaranteed to be dry and isolated from the outside of the carriage. When the vehicle travels through a wading section, it is avoided that the lower vehicle body 20 of the body structure is soaked by accumulated water and water seeps into the carriage interior between the first contact surface 12 and the second contact surface, and the situation of the body being flooded is avoided.

[0061] In some embodiments of the present application, as Figures 3 to 6As shown, the number of the third bolt-nut pairs for connecting the first column 11 (A-pillar) of the upper vehicle body 10 and the fourth connecting portion 234 of the torque box 23 is multiple. Through the mutual assistance of multiple third bolt-nut pairs during assembly, the connection strength between the first column 11 (A-pillar) of the upper vehicle body 10 and the fourth connecting portion 234 of the torque box 23 can be improved, ensuring that the body structure has sufficient mechanical strength. Among them, a part of the multiple third bolt-nut pairs is located inside the sealing ring 40, and the other part is located outside the sealing ring 40, that is, the multiple third bolt-nut pairs are respectively located on both sides of the sealing ring 40. In this way, the third bolt-nut pairs on both sides of the sealing ring 40 cause the sealing ring 40 to be subjected to the extrusion forces from the first contact surface 12 and the second contact surface on both sides, so that both sides of the sealing ring 40 are evenly squeezed. That is, the sealing ring 40 can elastically deform evenly, so as to better achieve the sealing between the first contact surface 12 and the second contact surface. When the vehicle drives through a wading section, it can prevent the lower vehicle body 20 of the body structure from being soaked by accumulated water and water from seeping into the interior of the compartment between the first contact surface 12 and the second contact surface, avoiding the situation of the body being flooded, and the interior of the compartment can be kept dry and isolated from the outside of the compartment.

[0062] Since the third bolt-nut pairs located outside the compartment are affected by environmental factors such as dust and water vapor, the bolt-nut pairs located outside the compartment are easily eroded, and then it is more difficult to disassemble the bolt-nut pairs located outside the compartment. Therefore, in some embodiments of the present application, the number of the third bolt-nut pairs located inside the sealing ring 40 is more than the number of the third bolt-nut pairs located outside the sealing ring 40. Under the condition of ensuring that both sides of the sealing ring 40 can be evenly squeezed by the first contact surface 12 and the second contact surface, and ensuring the connection strength between the first column 11 (A-pillar) of the upper vehicle body 10 and the fourth connecting portion 234 of the torque box 23, the number of the bolt-nut pairs located outside the compartment is minimized as much as possible, and a larger number of bolt-nut pairs are correspondingly designed to be located inside the compartment. In this way, the number of the bolt-nut pairs that are difficult to disassemble is reduced, and the bolt-nut pairs located inside the compartment are hardly affected by erosion and are relatively easy to disassemble, so that the efficiency of detaching the torque box 23 from the first column 11 (A-pillar) of the upper vehicle body 10 can be improved, and the working efficiency of repairing the damaged and deformed torque box 23 can also be improved.

[0063] Among them: "inside the sealing ring 40" means the interior of the compartment formed after the assembly of the upper vehicle body 10 and the lower vehicle body 20 is completed, and all belong to the range inside the sealing ring 40; correspondingly, "outside the sealing ring 40" means the exterior of the compartment formed after the assembly of the upper vehicle body 10 and the lower vehicle body 20 is completed, and all belong to the range outside the sealing ring 40.

[0064] In some embodiments of the present application, according to the volume and extension length of the torsion box 23, the number of the third bolt-nut pairs located inside the sealing ring 40 is four, and the four third bolt-nut pairs located inside the sealing ring 40 are arranged at intervals along the extension direction of the sealing ring 40. The connection effect of multiple third bolt-nut pairs between the first column 11 (A-pillar) of the upper vehicle body 10 and the torsion box 23 is mainly determined by the third bolt-nut pairs located inside the sealing ring 40, while the third bolt-nut pairs located outside the sealing ring 40 play an auxiliary connection role in the connection between the first column 11 (A-pillar) and the torsion box 23. If the number of the third bolt-nut pairs located inside the sealing ring 40 is set too many, then a corresponding number of through holes for passing bolts need to be drilled on the torsion box 23, which will cause the structural stress concentration of the torsion box 23 itself, and then lead to the reduction of the mechanical strength of the torsion box 23 itself; however, if the number of the third bolt-nut pairs located inside the sealing ring 40 is set too few, it will result in insufficient connection strength between the first column 11 (A-pillar) of the upper vehicle body 10 and the torsion box 23. Therefore, in this embodiment, the number of the third bolt-nut pairs located inside the sealing ring 40 is designed to be four, which can not only ensure that the torsion box 23 itself has a high mechanical strength, but also ensure the connection strength between the first column 11 (A-pillar) of the upper vehicle body 10 and the torsion box 23.

[0065] In some embodiments of the present application, the number of the third bolt-nut pairs located outside the sealing ring 40 is only set to one. Through this third bolt-nut pair, the first contact surface 12 and the second contact surface squeeze the part of the sealing ring 40 tending to the outside, so that the sealing ring 40 can uniformly undergo elastic deformation. In this way, it can better achieve the sealing setting between the first contact surface 12 and the second contact surface. When the vehicle travels through a wading section, it can prevent the lower vehicle body 20 of the vehicle body structure from being soaked by accumulated water, so that water does not seep into the interior of the vehicle compartment from between the first contact surface 12 and the second contact surface, avoiding the situation of the vehicle body being flooded, and the interior of the vehicle compartment can be kept dry and isolated from the outside of the vehicle compartment.

[0066] In some other embodiments of the present application, on the premise of ensuring that the torsion box 23 itself has a high mechanical strength, the number of the third bolt-nut pairs located outside the sealing ring 40 can also be set to multiple. And, the multiple third bolt-nut pairs located outside the sealing ring 40 are arranged at intervals along the extension direction of the sealing ring 40.

[0067] Specifically, as Figure 2 shown, the fourth connection part 234 of the torsion box 23 has a second overlapping side wall 2341, and the end of the first column 11 (A-pillar) abuts against the second overlapping side wall 2341, and then the end of the first column 11 (A-pillar) and the fourth connection part 234 are connected by a third bolt-nut pair.

[0068] In some embodiments of the present application, as Figure 2 shown, the floor assembly 24 includes two relatively arranged sill beams 241. Further, the floor assembly 24 further includes a seat cross beam 242, an expansion beam, a floor protection plate 15 (as Figure 7 shown), a floor 243, a battery and other components. The two ends of the seat cross beam 242 are respectively connected to the two sill beams 241. The two ends of the expansion beam are respectively connected to the two sill beams 241. The battery is assembled through the expansion beam. The floor protection plate 15 is welded and fixed to the bottom sides of the two sill beams 241 (that is, the floor protection plate 15 is located on the side of the sill beam 241 facing the ground, and the distance between the floor protection plate 15 and the ground is generally used as the ground clearance of the vehicle). The floor 243 is welded and fixed to the top sides of the two sill beams 241 (that is, the floor 243 is located on the side of the sill beam 241 facing the inside of the carriage). The expansion beam and the battery are located between the floor protection plate 15 and the floor 243. The end parts of the two sill beams 241 are respectively detachably connected to the third connection parts 233 of the two torque boxes 23 through second bolt and nut pairs. When a frontal collision accident causes the front bulkhead longitudinal beam 21 and the torque box 23 to undergo crush deformation, during the process of repairing and restoring the vehicle body structure, after removing the third bolt and nut pair between the first pillar 11 (A-pillar) of the upper vehicle body 10 and the fourth connection part 234 of the torque box 23, the second bolt and nut pair between the end part of the sill beam 241 and the third connection part 233 of the torque box 23 is removed, so as to detach the torque box 23 from the sill beam 241, and then a new torque box 23 is replaced and assembled, and thus the torque box 23 deformed and damaged due to the frontal collision accident can be repaired and restored. In this way, the working efficiency of repairing the torque box 23 can be improved.

[0069] Specifically, as Figure 6 shown, the third connection part 233 of the torque box 23 has a first overlapping side wall 2331, and the end part of the sill beam 241 overlaps on the first overlapping side wall 2331, and then the end part of the sill beam 241 and the third connection part 233 are connected through a second bolt and nut pair.

[0070] In some embodiments of the present application, as Figure 3 shown, the second connection part 232 of the torque box 23 is arranged as a plug-in cylinder structure 2321, and the end part of the front bulkhead longitudinal beam 21 is inserted into the plug-in cylinder structure 2321, and then the end part of the front bulkhead longitudinal beam 21 and the plug-in cylinder structure 2321 are connected through a first bolt and nut pair. By connecting the front bulkhead longitudinal beam 21 to the torque box 23 in an insertion and locking manner with a bolt and nut pair, the front bulkhead longitudinal beam 21 has better connection strength and the vehicle body structure is more stable.

[0071] In some embodiments of the present application, as Figures 2 to 4As shown, both ends of the front crossbeam 22 are fixedly welded to the first connection parts 231 of the two torsion boxes 23 respectively, so that the front crossbeam 22 and the two torsion boxes 23 form an integral structure. In this way, the mechanical strength of the front end part of the lower vehicle body 20 is improved, and the overall protection performance of the vehicle body structure is better. When a frontal collision accident causes the front longitudinal beam 21 and the torsion box 23 to undergo crush deformation, during the process of repairing and restoring the vehicle body structure, after removing the third bolt-nut pair between the first pillar 11 (A-pillar) of the upper vehicle body 10 and the fourth connection part 234 of the torsion box 23 and the second bolt-nut pair between the end of the sill beam 241 and the third connection part 233 of the torsion box 23, the two torsion boxes 23 and the front crossbeam 22 can be detached from the floor assembly 24 together, improving the work efficiency of disassembly and thus the work efficiency of maintenance.

[0072] In some other embodiments of the present application, both ends of the front crossbeam 22 are riveted and fixed to the first connection parts 231 of the two torsion boxes 23 respectively, that is, the front crossbeam 22 and the two torsion boxes 23 form an integral module. This can also ensure that the front end part of the lower vehicle body 20 has high mechanical strength. When a frontal collision accident causes the front longitudinal beam 21 and the torsion box 23 to undergo crush deformation, during the process of repairing and restoring the vehicle body structure, after removing the third bolt-nut pair between the first pillar 11 (A-pillar) of the upper vehicle body 10 and the fourth connection part 234 of the torsion box 23 and the second bolt-nut pair between the end of the sill beam 241 and the third connection part 233 of the torsion box 23, the two torsion boxes 23 and the front crossbeam 22 can be detached from the floor assembly 24 together, improving the work efficiency of disassembly and thus the work efficiency of maintenance.

[0073] In still some other embodiments of the present application, both ends of the front crossbeam 22 are detachably connected to the first connection parts 231 of the two torsion boxes 23 through bolt-nut pairs. In this way, when disassembling the torsion box 23 that has undergone crush deformation, the torsion box 23 can be disassembled individually, and then the new torsion boxes 23 can be disassembled and replaced one by one, improving the work efficiency of maintenance.

[0074] In some embodiments of the present application, the vehicle body structure further includes a front fender (commonly known as a front wing), as Figures 2 to 6As shown, the torsion box 23 is further provided with a fifth connecting portion 235, and the front bulkhead is detachably connected to the fifth connecting portion 235. As the front appearance of the body structure, the connection relationship between the front bulkhead and the fifth connecting portion 235 of the torsion box 23 needs to be hidden. Therefore, the front bulkhead and the fifth connecting portion 235 can be connected by a snap connection method or by screwing. When the front bulkhead is connected to the torsion box 23 by screwing, threaded blind holes are provided on the inner side of the front bulkhead, and screws are driven from the inner side of the torsion box 23 to hide the screws.

[0075] Moreover, there is also a connection relationship between the front bulkhead and the front compartment longitudinal beam 21 to ensure that the front bulkhead can always remain stable. When a very minor frontal collision occurs, for example, the severity of the frontal collision is less than that of the frontal collision in the first case above, the front bulkhead directly contacts the external collision object. That is, the frontal collision energy directly acts on the front bulkhead, causing the front bulkhead to collapse and deform (in this case, the front bulkhead is generally a sheet metal part) or break (in this case, the front bulkhead is generally a plastic part). The front bulkhead absorbs all the frontal collision energy, that is, the frontal collision energy will not be transmitted to the front compartment longitudinal beam 21 and the torsion box 23. When repairing the front bulkhead, only the deformed sheet metal front bulkhead needs to be reshaped by re-bending or a new sheet metal front bulkhead needs to be replaced to complete the repair, or a new plastic front bulkhead needs to be replaced for the damaged plastic front bulkhead to complete the repair, which is beneficial to improving the work efficiency of repairing the front bulkhead.

[0076] In some embodiments of the present application, as Figure 1 shown, the upper body 10 is further provided with a second pillar 13 (B-pillar), and the second pillar 13 (B-pillar) is detachably connected to the sill beam 241 through a fourth bolt and nut pair. In this way, during the process of disassembling and separating the upper body 10 and the lower body 20, not only the bolt and nut pairs between the first pillar 11 (A-pillar) and the front-end torsion box and the bolt and nut pairs between the third pillar 14 (C-pillar) and the rear-end torsion box need to be disassembled, but also the fourth bolt and nut pair between the second pillar 13 (B-pillar) and the sill beam 241 needs to be disassembled, so that the upper body 10 and the lower body 20 can be disassembled and separated, and the disassembly work is convenient and fast. Thus, the work difficulty of repairing the body structure can be reduced, and the work efficiency of repair can be improved.

[0077] Among them: Taking a general four-door five-seat sedan as an example, the upper body 10 of the body structure has a first pillar 11 (A-pillar), a second pillar 13 (B-pillar) and a third pillar 14 (C-pillar), as Figure 1As shown in the figure. The first pillar 11 (A-pillar) is the two pillars between the windshield and the left front door and between the windshield and the right front door; the second pillar 13 (B-pillar) is between the front seat and the rear seat in the vehicle compartment, that is, the longitudinal pillar between the two doors on each side, extending from the roof to the bottom of the vehicle. Looking from the inside, the seat belt of the front row seat is assembled on the second pillar 13 (B-pillar); the third pillar 14 (C-pillar) is on both sides of the rear row seat. The first pillar 11 (A-pillar), the second pillar 13 (B-pillar) and the third pillar 14 (C-pillar) are key parts to support the structural strength of the vehicle and protect the safety of the passengers in the vehicle.

[0078] According to the second aspect of the present application, a vehicle 100 is provided as designed, as Figure 7 shown. Among them, the vehicle includes the body structure as described above.

[0079] Specifically, the vehicle 100 is an electric vehicle, and the electric vehicle includes a drive motor 110, a battery 120 and wheels 130. The drive motor 110 and the wheels 130 are both assembled on the lower vehicle body 20, and the drive motor 110 drives the wheels 130 to rotate, so that the electric vehicle can run normally. The battery 120 is one of the components of the floor assembly 24.

[0080] For the vehicle assembled and formed by applying the body structure provided by the embodiment of the present application, when a frontal collision accident occurs during driving, the frontal collision energy acts on the front cabin longitudinal beam 21 and the torque box 23, causing the front cabin longitudinal beam 21 and the torque box 23 to undergo crush deformation. During the process of repairing and restoring the body structure of the vehicle, since the second connection part 232 between the front cabin longitudinal beam 21 and the torque box 23 is detachably connected by the first bolt-nut pair, the third connection part 233 between the floor assembly 24 and the torque box 23 is detachably connected by the second bolt-nut pair, and the fourth connection part 234 between the first pillar 11 (A-pillar) of the upper vehicle body 10 and the torque box 23 is detachably connected by the third bolt-nut pair, therefore, just loosen and disassemble the first bolt-nut pair, the front cabin longitudinal beam 21 can be disassembled relative to the torque box 23, and just disassemble the second bolt-nut pair and the third bolt-nut pair, the torque box 23 can be disassembled relative to the first pillar 11 (A-pillar) and the floor assembly 24 of the upper vehicle body 10. Then replace the new front cabin longitudinal beam 21 and the new torque box 23, and lock the first bolt-nut pair, the second bolt-nut pair and the third bolt-nut pair correspondingly again, and the repair of the deformed and damaged front cabin longitudinal beam 21 and torque box 23 due to the frontal collision accident can be completed. In this way, the difficulty of the repair work of the front cabin longitudinal beam 21 and the torque box 23 is reduced, thereby improving the work efficiency of repairing the front cabin longitudinal beam 21 and the torque box 23, and also reducing the cost of repairing the front cabin longitudinal beam 21 and the torque box 23.

[0081] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A vehicle body structure, characterized in that: include: The upper body, including the first column; The lower vehicle body includes a front compartment longitudinal beam, a front cross beam, a torsion box and a floor assembly, wherein the torsion box includes a torsion box body and a first connection part, a second connection part, a third connection part and a fourth connection part connected to the torsion box body, the two ends of the front cross beam are respectively connected to the first connection parts of the two torsion boxes, the front compartment longitudinal beam is detachably connected to the second connection part of the torsion box, the floor assembly is detachably connected to the third connection part of the torsion box, and the first column is detachably connected to the fourth connection part of the torsion box.

2. The vehicle body structure according to claim 1, characterized in that: The front compartment longitudinal beam is connected to the second connection part of the torsion box through a first bolt and nut pair, the floor assembly is connected to the third connection part of the torsion box through a second bolt and nut pair, and the first column is connected to the fourth connection part of the torsion box through a third bolt and nut pair.

3. The vehicle body structure according to claim 2, characterized in that: The upper vehicle body has a first contact surface, the front cross beam, the floor assembly and the two torsion boxes form a second contact surface, and the first contact surface is arranged opposite to the second contact surface; The vehicle body structure further includes a sealing ring, which is clamped between the first contact surface and the second contact surface.

4. The vehicle body structure according to claim 3, characterized in that: The number of the third bolt and nut pairs is plural, wherein a portion of the third bolt and nut pairs are located on the inner side of the sealing ring, and another portion of the third bolt and nut pairs are located on the outer side of the sealing ring.

5. The vehicle body structure according to claim 4, characterized in that: The number of the third bolt-nut pairs located inside the sealing ring is greater than the number of the third bolt-nut pairs located outside the sealing ring.

6. The vehicle body structure according to claim 4, characterized in that: The number of the third bolt and nut pairs located on the inner side of the sealing ring is four, and the four third bolt and nut pairs are arranged at intervals along the extending direction of the sealing ring.

7. The vehicle body structure according to any one of claims 2 to 6, characterized in that: The floor assembly comprises two sill beams arranged opposite to each other, and the ends of the two sill beams are detachably connected to the third connecting parts of the two torsion boxes respectively.

8. The vehicle body structure according to claim 7, characterized in that: The third connection portion of the torsion box has a first overlapping side wall, and the end of the door sill beam is overlapped on the first overlapping side wall and then connected through the second bolt and nut pair.

9. The vehicle body structure according to any one of claims 2 to 6, characterized in that: The second connection portion of the torque box is configured as a plug-in tube structure, and the end of the front compartment longitudinal beam is inserted into the plug-in tube structure and connected via a first bolt and nut pair.

10. The vehicle body structure according to any one of claims 2 to 6, characterized in that: The fourth connection portion of the torsion box has a second overlapping side wall, and the end of the first column abuts against the second overlapping side wall and is connected through the third bolt and nut pair.

11. The vehicle body structure according to any one of claims 1 to 6, characterized in that: The two ends of the front cross beam are respectively welded and fixed to the first connecting parts of the two torsion boxes; Alternatively, the two ends of the front cross beam are respectively fixed to the first connecting parts of the two torsion boxes by riveting; Alternatively, the two ends of the front cross beam are respectively connected to the first connecting parts of the two torsion boxes through bolt and nut pairs.

12. The vehicle body structure according to any one of claims 1 to 6, characterized in that: The vehicle body structure further includes a dash panel, and the torque box further includes a fifth connection portion connected to the torque box body, and the dash panel is detachably connected to the fifth connection portion.

13. The vehicle body structure according to claim 7, characterized in that: The upper vehicle body further comprises a second column, and the second column is detachably connected to the door sill beam.

14. The vehicle body structure according to claim 13, characterized in that: The second column is connected to the door sill beam via a fourth bolt and nut pair.

15. A vehicle, characterized in that: Comprising a vehicle body structure as described in any one of claims 1-14.

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