B-column-free vehicle body structure, vehicle and assembling method of B-column-free vehicle body structure

Abstract

The invention relates to the technical field of vehicle bodies, in particular to a B-column-free vehicle body structure, a vehicle and an assembling method of the B-column-free vehicle body structure. The B-column-free vehicle body structure comprises a front windshield assembly, a top cover longitudinal beam, a top cover rear assembly, a back door assembly and a lower vehicle body assembly; the front end of the top cover longitudinal beam is fixedly connected with the middle of the upper end of the top cover rear assembly. Gull-wing door installation parts are arranged on the left side and the right side of the middle of the top cover longitudinal beam. The lower end of the front windshield assembly is fixedly lapped with the front part of the lower vehicle body assembly, the lower end of the top cover rear assembly is fixedly lapped with the rear part of the lower vehicle body assembly, and the back door assembly is fixedly connected with the rear sides of the top cover rear assembly and the lower vehicle body assembly; the front windshield assembly, the top cover longitudinal beam, the top cover rear assembly, the back door assembly and the lower automobile body assembly are all aluminum alloy integrally-cast forming parts. The European wing type opening mode of the whole side vehicle door can be met, and on the premise that the performance is met, light-weight and lean design and production of a vehicle body are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle bodies, and in particular to a vehicle body structure without a B-pillar, a vehicle, and an assembly method of the vehicle body structure without a B-pillar. Background Art

[0002] In the global environment of energy conservation and emission reduction, lightweight and lean automobile bodies are key topics in automobile technology research. Traditional automobile bodies are made of hundreds of parts that are welded through multiple processes, from single pieces to sub-assemblies, then sub-assemblies to assemblies, and finally welded into white bodies. They also have to go through electrophoresis treatment for painting. There are many parts, many welding points, complex processes, large plant areas, and long dimensional chains, which are not conducive to lightweight and lean automobile bodies. How to achieve lightweight, lean design and production of automobile bodies through the application of lightweight materials and integrated module design is a bottleneck problem that needs to be solved urgently.

[0003] In the related art, a split automobile body is provided, including an integrated lower body and an integrated upper body, wherein the integrated lower body includes an integrated front cabin, front floor, rear floor, and rear enclosure, wherein the front cabin, front floor, rear floor, and rear enclosure form a frame-like semi-enclosed structure that is open upward; the integrated upper body includes an integrated front side beam, an upper left enclosure, an upper right enclosure, an upper rear enclosure, and a roof cross beam, wherein the front side beam, an upper left enclosure, an upper right enclosure, an upper rear enclosure, and a roof cross beam form a frame-like semi-enclosed structure that is open downward. The integrated structural design reduces the number of parts from hundreds to two, thereby greatly simplifying the complexity of the product design. However, due to the varied shapes and complex structures of the upper body, it is not possible to meet the requirements of the integrated upper body for all models. Summary of the invention

[0004] The object of the present invention is to provide a B-pillar-free body structure, a vehicle and an assembly method of the B-pillar-free body structure, which can meet the gull-wing opening mode of the entire side door and realize lightweight, lean design and production of the body while meeting the performance requirements.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: In the first aspect, the present invention provides a B-pillar-free vehicle body structure, comprising a front windshield assembly, a roof longitudinal beam, a roof rear assembly, a tailgate assembly and a lower vehicle body assembly, wherein the front end of the roof longitudinal beam is fixedly connected to the middle part of the upper end of the front windshield assembly, the rear end of the roof longitudinal beam is fixedly connected to the middle part of the upper end of the roof rear assembly, and gull-wing door mounting parts are provided on the left and right sides of the middle part of the roof longitudinal beam; the lower end of the front windshield assembly is overlapped and fixed to the front part of the lower vehicle body assembly, the lower end of the roof rear assembly is overlapped and fixed to the rear part of the lower vehicle body assembly, and the tailgate assembly is fixedly connected to the rear part of the roof rear assembly and the rear side of the lower vehicle body assembly; the front windshield assembly, the roof longitudinal beam, the roof rear assembly, the tailgate assembly and the lower vehicle body assembly are all one-piece die-cast parts of aluminum alloy.

[0006] Furthermore, the front end of the top cover longitudinal beam is screwed and fixed to the middle part of the upper end of the front windshield assembly, and the rear end of the top cover longitudinal beam is screwed and fixed to the middle part of the upper end of the top cover rear assembly; A positioning member is fixed between the roof longitudinal beam and the front windshield assembly and / or between the roof longitudinal beam and the roof rear assembly.

[0007] Furthermore, the overlapping gap between the roof longitudinal beam and the front windshield assembly and the overlapping gap between the roof longitudinal beam and the roof rear assembly are filled with sealant.

[0008] Furthermore, the lower end of the front windshield assembly is screwed and / or riveted to the front of the lower body assembly; the lower end of the top cover rear assembly is screwed and / or riveted to the rear of the lower body assembly.

[0009] Furthermore, a guide positioning member is fixed between the lower end of the front windshield assembly and the front portion of the lower body assembly and / or between the lower end of the top cover rear assembly and the rear portion of the lower body assembly.

[0010] Furthermore, the tailgate assembly is screwed and / or riveted to the rear side of the top cover rear assembly and the lower body assembly.

[0011] Furthermore, it also includes side panels fixed to the left and right sides of the vehicle.

[0012] Furthermore, it also includes a top cover outer panel fixed to the top surface of the vehicle.

[0013] In a second aspect, the present invention provides a vehicle comprising the above-mentioned B-pillar-free body structure.

[0014] In a third aspect, the present invention provides a method for assembling a vehicle body structure without a B-pillar, comprising: Connecting the front windshield assembly, the roof longitudinal beam, and the roof rear assembly into an upper vehicle body assembly, wherein the front end of the roof longitudinal beam is fixedly connected to the middle portion of the upper end of the front windshield assembly, and the rear end of the roof longitudinal beam is fixedly connected to the middle portion of the upper end of the roof rear assembly; The upper body assembly is overlapped and fixed with the lower body assembly, the lower end of the front windshield assembly is overlapped and fixed with the front part of the lower body assembly, and the lower end of the top cover rear assembly is overlapped and fixed with the rear part of the lower body assembly; The back door assembly is fixedly connected to the rear assembly of the top cover and the rear side of the lower body assembly to obtain a body structure without a B-pillar.

[0015] The present invention has the following unexpected beneficial effects: 1. The front end of the roof longitudinal beam of the present invention is fixedly connected to the middle of the upper end of the front windshield assembly, and the rear end of the roof longitudinal beam is connected to the middle of the upper end of the roof rear assembly. This connection method not only enhances the overall rigidity of the vehicle body, but also provides a safer and more stable riding environment for passengers. It is worth noting that gull-wing door mounting parts are also designed on the left and right sides of the middle of the roof longitudinal beam, which provides users with a unique door opening experience, improves the comfort of users getting on and off the vehicle, and meets users' needs for diversified and cool door opening.

[0016] 2. The B-pillar-free vehicle body structure of the present invention includes a front windshield assembly, a roof longitudinal beam, a roof rear assembly, a back door assembly and a lower vehicle body assembly, and the front windshield assembly, the roof longitudinal beam, the roof rear assembly, the back door assembly and the lower vehicle body assembly are all aluminum alloy one-piece die-casting parts. The material density of aluminum alloy material is only one-third of that of steel, which greatly reduces the weight of the vehicle body compared to a steel vehicle body. In addition, the one-piece die-casting structure has a high degree of design freedom. Through CAE simulation analysis, the material thickness and reinforcement rib design are precisely designed, which can be more conducive to the achievement of various performance goals, achieve lightweight effects, and reduce weight by more than 25%.

[0017] 3. The B-pillar-free body structure of the present invention integrates nearly 400 traditional parts into five parts, with a high degree of parts integration, which greatly reduces the development costs of tooling such as molds, fixtures, and gauges, reduces the investment in R&D and production manpower costs, realizes lean production of products, reduces the accumulation of dimensional chain errors, has high precision, can reduce the body development and debugging time, and shortens the project development cycle to a certain extent.

[0018] 4. The B-pillar-free body structure of the present invention has a simple layout. According to the distribution of force loads, the upper body assembly adopts a ring design concept and is divided into a "three-ring and one-beam" structure, namely: the front windshield ring, the rear ring of the roof, the rear door ring and the longitudinal beam of the roof. Each ring itself forms an independent closed structure with strong reliability. The lower body assembly adopts a one-piece integral molding, and the bottom beam system forms an independent front and rear penetrating frame structure. The frame has a smooth transition and ensures smooth force transmission, which can better transmit and absorb collision energy. In addition, the integrated die-casting aluminum alloy molding process is adopted to greatly reduce the number of connection points, and the key joint positions are integrally molded to reduce the risk of failure of welding points in traditional body structures and improve the safety performance of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0020] Figure 1 is an exploded view of the vehicle body structure without a B-pillar according to the present invention; Figure 2 is an axial view of the vehicle body structure without a B-pillar according to the present invention; Figure 3 yes Figure 2 The schematic diagram of the installation section at the partial view I shown; Figure 4 yes Figure 2 The schematic diagram of the installation section at the partial view II is shown; Figure 5 yes Figure 2 Partial view shown Figure III Installation section diagram; Figure 6 yes Figure 2 Partial view shown Figure IV Installation section diagram; Figure 7 This is one of the schematic diagrams of the assembly process of the vehicle body structure without a B-pillar according to the present invention; Figure 8 This is the second schematic diagram of the assembly process of the vehicle body structure without a B-pillar according to the present invention; Fig. 9 It is an axial view of the vehicle body structure without a B-pillar (with doors) described in the present invention.

[0021] In the figure, 1 is a front windshield assembly, 11 is a first mounting boss, 12 is a positioning boss, 13 is a first overlapping edge, 2 is a top cover longitudinal beam, 21 is a second mounting boss, 22 is a positioning pin, 3 is a top cover rear assembly, 31 is a guide groove, 4 is a back door assembly, 41 is a screw, 5 is a lower body assembly, 51 is a second overlapping edge, 52 is a guide block, 6 is a side panel outer plate, 7 is a top cover outer plate, 71 is a first plate body, 72 is a second plate body, and 73 is a third plate body; 10—first bolt, 20—second bolt, 30—third bolt, 40—nut; 50—car door, 60—strut, 70—sealing strip. DETAILED DESCRIPTION

[0022] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0024] In one embodiment, see Figure 1 As shown, the present invention provides a B-pillar-free vehicle body structure, including a front windshield assembly 1, a roof longitudinal beam 2, a roof rear assembly 3, a back door assembly 4 and a lower vehicle body assembly 5, wherein the front end of the roof longitudinal beam 2 is fixedly connected to the middle part of the upper end of the front windshield assembly 1, the rear end of the roof longitudinal beam 2 is fixedly connected to the middle part of the upper end of the roof rear assembly 3, and gull-wing door mounting parts are provided on the left and right sides of the middle part of the roof longitudinal beam 2. The lower end of the front windshield assembly 1 is overlapped and fixed to the front part of the lower vehicle body assembly 5, the lower end of the roof rear assembly 3 is overlapped and fixed to the rear part of the lower vehicle body assembly 5, and the back door assembly 4 is fixedly connected to the rear side of the roof rear assembly 3 and the lower vehicle body assembly 5. The front windshield assembly 1, the roof longitudinal beam 2, the roof rear assembly 3, the back door assembly 4 and the lower vehicle body assembly 5 are all aluminum alloy integral die-casting parts.

[0025] The front windshield assembly 1 is located at the front end of the vehicle body and is designed to install a front windshield. The lower end of the front windshield assembly 1 is fixedly connected to the front part of the lower vehicle body assembly 5 by overlapping to ensure the stability and sealing of the vehicle body.

[0026] The roof longitudinal beam 2 serves as the core support structure of the top of the vehicle body. The front end of the roof longitudinal beam 2 is fixedly connected to the middle of the upper end of the front windshield assembly 1, and the rear end of the roof longitudinal beam 2 is connected to the middle of the upper end of the roof rear assembly 3. This connection method not only enhances the overall rigidity of the vehicle body, but also provides passengers with a safer and more stable riding environment. It is worth noting that gull-wing door installation parts are also designed on the left and right sides of the middle of the roof longitudinal beam 2, which provides users with a unique door opening experience, improves the comfort of users getting on and off the vehicle, and meets users' needs for diversified and cool door opening.

[0027] The top cover rear component 3 is located at the top rear end of the vehicle body, and is designed to be connected to the back door component 4. The lower end of the top cover rear component 3 is fixed to the rear of the lower vehicle body component 5 by overlapping, which further strengthens the stability of the vehicle body structure.

[0028] The back door assembly 4 is fixedly connected to the rear side of the top cover rear assembly 3 and the lower body assembly 5, and is generally used to install a rear windshield and provide a passage to enter the rear of the vehicle.

[0029] The lower body assembly 5 is the bottom structure of the vehicle body. The lower body assembly 5 not only bears the weight of the entire vehicle body, but is also responsible for connecting various upper assemblies. The lower body assembly 5 is fixed to the front windshield assembly 1 and the top cover rear assembly 3 by overlapping, ensuring the integrity and safety of the vehicle body.

[0030] It is particularly worth mentioning that the front windshield assembly 1, the roof longitudinal beam 2, the rear roof assembly 3, the back door assembly 4 and the lower body assembly 5 all adopt the aluminum alloy die-casting integrated molding technology, which improves the strength and precision of the body parts. The material density of the aluminum alloy material is only one-third of that of steel, which greatly reduces the weight of the body compared to the steel body. In addition, the one-piece die-casting structure has a high degree of freedom in design. Through CAE simulation analysis, the material thickness and reinforcement rib design are precisely designed, which can be more conducive to the achievement of various performance goals, achieve lightweight effects, and reduce weight by more than 25%, which helps to improve the fuel economy and handling performance of the vehicle.

[0031] The B-pillar-free body structure of the present invention integrates nearly 400 traditional parts into five parts, with a high degree of parts integration, which greatly reduces the development costs of tooling such as molds, fixtures, and inspection tools, reduces the investment in research and development and production manpower costs, realizes lean production of products, reduces the accumulation of dimensional chain errors, has high precision, can reduce the body development and debugging time, and shortens the project development cycle to a certain extent.

[0032] The B-pillar-free body structure of the present invention has a simple layout. According to the distribution of force loads, the upper body assembly adopts a ring design concept and is divided into a "three-ring and one-beam" structure, namely: the front windshield ring in the front windshield assembly 1, the top cover rear ring in the top cover rear assembly 3, the back door ring in the back door assembly 4, and the top cover longitudinal beam 2. Each ring forms an independent closed structure with strong reliability. The lower body assembly 5 is formed in one piece with one part, and the bottom beam system forms an independent front-to-back frame structure. The frame has a smooth transition and ensures smooth force transmission, which can better transmit and absorb collision energy. In addition, the integrated die-casting aluminum alloy molding process is adopted to greatly reduce the number of connection points, and the key joint positions are formed in one piece, which reduces the risk of failure of welding points in traditional body structures and improves the safety performance of the whole vehicle.

[0033] In summary, the B-pillar-less vehicle body structure design of the present invention achieves lightweight, high strength and excellent safety performance of the vehicle body structure through innovative connection methods and high-performance aluminum alloy die-casting parts.

[0034] In a preferred embodiment, see Figure 2 and Figure 3 As shown, the front end of the roof longitudinal beam 2 is screwed and fixed to the middle of the upper end of the front windshield assembly 1, and the rear end of the roof longitudinal beam 2 is screwed and fixed to the middle of the upper end of the roof rear assembly 3. This connection method not only has a high connection strength, ensuring the stability of the entire vehicle body top structure, but also facilitates disassembly and maintenance, improving the maintainability of the vehicle body structure.

[0035] For example, see Figure 2 and Figure 3 As shown, a mounting groove is provided at a position corresponding to the front end of the top cover longitudinal beam 2 in the middle of the upper end of the front windshield assembly 1, and four first mounting bosses 11 extending upward are integrally formed in the mounting groove, and four second mounting bosses 21 corresponding to the positions of the first mounting bosses 11 are integrally formed at the front end of the top cover longitudinal beam 2. A threaded hole matching the first bolt 10 is provided in the first mounting boss 11, and the threaded hole is made by machining. A through hole for the second bolt 10 to pass through is provided in the second mounting boss 21. During installation, the second bolt 10 is passed through the through hole on the second mounting boss 21 and matched with the threaded hole in the first mounting boss 11 to achieve a stable connection between the top cover longitudinal beam 2 and the front windshield assembly 1. In order to ensure assembly accuracy, the matching surfaces of the first mounting boss 11 and the second mounting boss 21 are machined.

[0036] Similarly, the roof longitudinal beam 2 and the roof rear component 3 are firmly connected by providing a mounting boss.

[0037] In order to further enhance the connection stability and positioning accuracy between the roof longitudinal beam 2 and the front windshield assembly 1 and between the roof longitudinal beam 2 and the roof rear assembly 3, positioning components are fixed between the roof longitudinal beam 2 and the front windshield assembly 1 and between the roof longitudinal beam 2 and the roof rear assembly 3. The positioning components can be special positioning pins, positioning blocks or other forms of positioning devices, and their function is to provide accurate positioning references for various components during the assembly process to ensure the accuracy and consistency of the vehicle body structure.

[0038] The fixing method of the positioning member can be selected according to the actual situation, which can be welding, screwing or other reliable connection methods. By fixing the positioning member, the problem of overall structural instability or reduced precision caused by slight deviations between components during the assembly process can be greatly reduced, thereby improving the overall quality and performance of the body structure.

[0039] Exemplarily, the positioning member includes a positioning pin and a positioning hole. Figure 3 As shown, a positioning boss 12 extending upward is provided at the bottom of the installation groove of the front windshield assembly 1, a positioning hole is provided in the positioning boss 12, and a positioning pin 22 adapted to the positioning hole is integrally formed on the lower side of the front end of the roof longitudinal beam 2. In order to facilitate positioning and matching, a guide element is provided at the opening of the positioning hole of the positioning boss 12, and a guide cone angle is provided at the periphery of the lower end of the positioning pin 22.

[0040] In order to further ensure the positioning effect, the top cover longitudinal beam 2 adopts front and rear main and auxiliary positioning, that is, one of the positioning pins at the front and rear ends of the top cover longitudinal beam 2 is used as the main positioning pin, and the other is used as the auxiliary positioning pin. If the positioning pin is the main positioning pin, the positioning hole corresponding to the main positioning pin is designed as a round hole to limit the movement of the main positioning pin in the front and rear and left and right directions. If the positioning pin is the auxiliary positioning pin, the positioning hole corresponding to the auxiliary positioning pin is designed as an oblong hole extending along the front and rear direction to limit the movement of the auxiliary positioning pin in the left and right directions. The above positioning holes need to be machined to ensure accuracy.

[0041] In summary, this preferred embodiment further improves the connection stability and positioning accuracy of the B-pillar-free vehicle body structure by adopting a screw-fixed connection method and adding a positioning component design, thereby providing passengers with a safer and more reliable riding environment.

[0042] Furthermore, in order to ensure the sealing requirement, the overlapping gap between the roof longitudinal beam 2 and the front windshield assembly 1 and the overlapping gap between the roof longitudinal beam 2 and the roof rear assembly 3 are filled with sealant.

[0043] The sealant is a self-drying sealant, which is designed to be self-drying, meaning that it can cure on its own without the need for an external heat source or special equipment, thereby simplifying the construction process and improving production efficiency. In addition, depending on the specific application scenario and performance requirements, you can also choose to use a self-drying structural adhesive for filling. Compared with ordinary sealants, structural adhesives generally have higher strength and better durability, and can maintain stable sealing performance under harsher environmental conditions. Therefore, in vehicles that need to withstand large loads or experience extreme climatic conditions, using a self-drying structural adhesive for gap filling would be a more appropriate choice.

[0044] Regardless of the type of sealant you choose, the filling process needs to be strictly controlled to ensure the sealing effect. Before filling, the overlap gap should be thoroughly cleaned and dried to remove any impurities and moisture that may affect the sealing performance. Then, use appropriate tools to evenly apply the sealant in the gap, ensuring that there is no omission or excessive application. Finally, wait for the sealant to fully cure before proceeding with subsequent assembly and testing.

[0045] By adopting the method of filling the sealant, the present invention not only improves the sealing performance of the B-pillar-free vehicle body structure, but also effectively prevents the intrusion of rain, dust and other dirt, thereby providing passengers with a more comfortable, safe and reliable riding environment.

[0046] In a preferred embodiment, see Figure 2 , Figure 4 and Figure 5 As shown, the lower end of the front windshield assembly 1 is screwed and / or riveted to the front of the lower body assembly 5, and the lower end of the top cover rear assembly 3 is screwed and / or riveted to the rear of the lower body assembly 5.

[0047] Specifically, the connection between the lower end of the front windshield assembly 1 and the front of the lower body assembly 5 can be achieved by bolts or rivets. Bolt connection has the advantages of easy disassembly and reassembly, and is convenient for maintenance and repair; while riveting provides stronger connection strength and durability, especially in areas that need to withstand greater stress. According to specific design requirements and vehicle use environment, bolt connection alone, riveting alone, or a combination of the two can be selected to achieve the best connection effect.

[0048] For example, the connection between the lower end of the front windshield assembly 1 and the front part of the lower body assembly 5 is achieved by combining bolts and rivets, see Figure 4 As shown, the left and right A-pillar regions of the front windshield assembly 1 and the front of the lower body assembly 5 are connected at positions where a double-layer bolt connection structure is used. The second bolts 20 installed and fixed inside and outside are arranged symmetrically. The number of connection points is preferably four inside and four outside, and the specific number is subject to CAE simulation analysis. Specifically, a first overlap edge 13 is provided at the lower end of the A-pillar region of the front windshield assembly 1, and a second overlap edge 51 matching the first overlap edge 13 is provided at the front of the lower body assembly 5. The second bolt 20 passes through the second overlap edge 51 and is connected with the threaded hole on the first overlap edge 13 to achieve a stable connection between the front windshield assembly 1 and the lower body assembly 5. The remaining overlap areas between the front windshield assembly 1 and the lower body assembly 5, such as the overlap area between the front wall plate on the lower body assembly 5 and the front windshield assembly 1, are fixed by riveting. After riveting, a self-drying sealant is applied to the rivet surface at the punctured end to play an anti-corrosion role.

[0049] Similarly, the connection between the lower end of the top cover rear assembly 3 and the rear of the lower body assembly 5 is also fixed by screwing and riveting. This connection method ensures a tight fit and stable connection between the top cover and the lower body, and effectively prevents loosening or abnormal noise caused by bumps or vibrations during driving. Figure 5As shown, a third bolt 30 is used to connect the lower end of the C-pillar area of ​​the top cover rear component 3 and the rear of the lower body component 5, and the remaining matching areas of the C-pillar are fixed by riveting. After riveting, a self-drying sealant is applied to the rivet surface at the punctured end to play an anti-corrosion role.

[0050] In summary, by adopting the method of screwing and / or riveting, the connection between the front windshield assembly 1 and the front part of the lower body assembly 5 and the connection between the rear part of the top cover assembly 3 and the rear part of the lower body assembly 5 is effectively guaranteed, providing a solid foundation for the overall structural stability and safety of the vehicle.

[0051] In a preferred embodiment, guide positioning components are fixed between the lower end of the front windshield assembly 1 and the front portion of the lower body assembly 5 and between the lower end of the top cover rear assembly 3 and the rear portion of the lower body assembly 5 .

[0052] The design of the guide and positioning components is intended to simplify the assembly process, improve assembly accuracy, and ensure the stability and consistency of the vehicle body structure. These components can be various forms of positioning pins, guide blocks or guide grooves, etc., which are accurately installed at the corresponding positions of the front windshield assembly 1, the rear roof assembly 3 and the lower body assembly 5.

[0053] During the assembly process, the guide and positioning components play a role in guiding and aligning. When the front window assembly 1 or the top cover rear assembly 3 is placed on the lower body assembly 5, these components are automatically aligned and inserted into the predetermined holes or slots, thereby ensuring the precise fit between the various components. This design not only improves assembly efficiency, but also effectively reduces assembly problems caused by human operation errors.

[0054] In addition, the guide and positioning components also have a certain fixing function. After the assembly is completed, they can assist bolts, rivets and other connectors to firmly fix the various components together to form a stable body structure. This design enhances the rigidity and durability of the body and improves the stability and safety of the vehicle during driving.

[0055] In summary, by introducing the guide positioning member, the present invention further optimizes the assembly process of the B-pillar-free body structure, improves the assembly accuracy and efficiency, and ensures the stability and consistency of the body structure. This design not only improves the overall performance of the vehicle, but also provides passengers with a safer and more comfortable riding experience.

[0056] For example, see Figure 5As shown, the guide positioning member between the lower end of the top cover rear component 3 and the rear of the lower body component 5 includes a guide block 52 and a guide groove 31. The guide block 52 is integrally formed with the lower body component 5, and a chamfer is provided on the outer peripheral edge of the upper end of the guide block 52. The guide groove 31 is integrally formed on the top cover rear component 3, with the opening facing downward, and a chamfer is provided at the opening position of the guide groove 31 to ensure that the guide hole 52 can be smoothly inserted into the guide groove 31.

[0057] In order to ensure assembly accuracy, the surfaces of the guide block 52 and the guide groove 31 are machined. The upper end of the guide block 52 contacts and cooperates with the bottom of the guide groove 31 to ensure the relative position accuracy between the top cover rear component 3 and the lower body component 5 in the vertical direction.

[0058] In a preferred embodiment, see Figure 2 and Figure 6 As shown, the back door assembly 4 is screwed and / or riveted to the rear side of the top cover rear assembly 3 and the lower body assembly 5. This connection method not only provides structural firmness, but also ensures the stability and reliability of the back door during opening and closing.

[0059] Specifically, bolting and riveting are both common mechanical connection methods that connect two or more parts together through fasteners such as bolts, nuts or rivets. Bolting has the advantage of easy disassembly and reassembly, which is convenient for maintenance and repair; while riveting provides stronger connection strength and durability, especially in areas that need to withstand greater stress.

[0060] In the connection between the back door assembly 4 and the rear side of the top cover rear assembly 3 and the lower body assembly 5, bolt connection, riveting, or a combination of the two can be selected according to specific design requirements and vehicle use environment. This flexible selectivity enables the connection design to adapt to different application scenarios and performance requirements.

[0061] For example, see Figure 2 and Figure 6 As shown, threaded connection structures are provided at the left and right corner areas of the upper part of the back door assembly 4. There are four threaded connection structures on the left and right sides, and the specific number and thread specifications are selected according to the adaptability of the structure and CAE simulation analysis. For details, see Figure 6A connecting boss is integrally formed on the back door assembly 4, and a screw 41 is arranged on the connecting boss. To ensure that the back door frame assembly does not interfere, the connecting screw 41 is arranged horizontally (i.e., in the front-to-back direction) and is made by machining. A mechanical mounting hole is provided on the rear cover assembly 3, and is fastened and connected by a nut 40. The overlapping areas of the remaining body frame subassemblies and the back door assembly 4, such as the rear crossbeam area of ​​the top cover and the rear enclosure matching area, are fixed by riveting. After riveting, a self-drying sealant is applied to the pierced end rivet surface to play an anti-corrosion role.

[0062] In summary, by adopting the method of screwing and / or riveting, the connection between the back door assembly 4 and the rear side of the top cover rear assembly 3 is effectively guaranteed, the stability and safety of the vehicle body structure are improved, and a more reliable and comfortable riding experience is provided for passengers. At the same time, it also meets the requirements of the modern automobile manufacturing industry for efficient, precise and reliable connection technology.

[0063] In a preferred embodiment, see Figure 1 As shown, the B-pillar-free body structure also includes side panels 6 fixed to the left and right sides of the vehicle. The side panels 6 are an important part of the body structure, which covers the side of the vehicle and provides necessary protection and support. In the B-pillar-free body structure, since the traditional B-pillar design is removed, the role of the side panels 6 becomes more critical. They not only need to withstand lateral impact forces, but also need to work closely with the roof and chassis structure to ensure the overall rigidity and stability of the body.

[0064] The side outer panel 6 adopts a carbon fiber structure. If cost is a concern, a lower-cost engineering plastic can be used to reduce the weight of the vehicle body and improve fuel economy.

[0065] The side outer panels 6 are fixed to other parts of the vehicle body (such as the rear roof assembly and the lower body assembly) by adhesive bonding to form a complete vehicle body structure. Specifically, the two side outer panels 6 are respectively bonded to the left and right sides of the vehicle using self-drying structural adhesive, and rivets are added locally based on CAE simulation analysis results.

[0066] In a preferred embodiment, see Figure 1 As shown, it also includes a roof outer panel 7 fixed to the top surface of the vehicle.

[0067] The roof outer panel 7 is a covering part of the top of the vehicle, which provides a smooth surface and beautiful appearance of the roof. In the vehicle body structure without B-pillars, the roof outer panel 7 is closely matched with the roof longitudinal beam 2 and the roof rear assembly 3 and other structural parts to form a load-bearing and protection system for the roof part. Figure 1As shown, the top cover outer panel 7 includes a first plate body 71 matching the upper end of the front windshield assembly 1 , a second plate body 72 matching the top cover longitudinal beam 2 , and a third plate body 73 matching the upper side of the top cover rear assembly 3 .

[0068] When the material of the top cover outer plate 7 is glass, glass glue is selected to be connected to the top surface of the vehicle. When the material of the top cover outer plate 7 is engineering plastic or carbon fiber material, structural glue and local rivets are selected to be connected to the top surface of the vehicle to ensure the stability and safety of the roof structure.

[0069] In summary, the main frame of the B-pillar-free body structure described in the present invention is made of aluminum alloy die-casting material, the surface of the component ends is treated with anti-corrosion, the appearance parts are made of carbon fiber, engineering plastics or glass, the appearance can be pasted with film according to needs, and cold connection technologies such as threading, gluing, and riveting are used between the components. After the components are delivered by the supplier, all processes are completed directly in the final assembly workshop, eliminating the stamping, welding, and painting workshops, subverting the traditional automobile manufacturing process.

[0070] In one embodiment, see Fig. 9 As shown, the present invention provides a vehicle, including the above-mentioned B-pillar-free body structure. An integral door opening stopper is formed on the side of the B-pillar-free body structure, the stopper has a smooth transition, and a sealing strip 70 is clamped and fixed around the stopper to ensure the sealing performance of the side integral door. Two electric struts 60 are arranged on the top of the body, and the door lock is arranged in the middle position of the lower part of the body to ensure that the entire side door 50 can be opened and locked.

[0071] In one embodiment, see Figure 7 As shown, the present invention provides an assembly method of a vehicle body structure without a B-pillar, comprising: Step 1: Connect the front windshield assembly 1, the top cover longitudinal beam 2, and the top cover rear assembly 3 into an upper body assembly, wherein the front end of the top cover longitudinal beam 2 is fixedly connected to the middle part of the upper end of the front windshield assembly 1, and the rear end of the top cover longitudinal beam 2 is fixedly connected to the middle part of the upper end of the top cover rear assembly 3.

[0072] Step 2: overlap and fix the upper body assembly with the lower body assembly 5, overlap and fix the lower end of the front windshield assembly 1 with the front part of the lower body assembly 5, and overlap and fix the lower end of the top cover rear assembly 3 with the rear part of the lower body assembly 5.

[0073] Step three, the back door assembly 4 is fixedly connected to the rear side of the top cover rear assembly 3 and the lower body assembly 5 to obtain a body structure without a B-pillar.

[0074] Further, see Figure 8 As shown, the assembly method further includes: Step 5: Connect the left and right side outer panels 6 to the left and right sides of the vehicle body structure without a B-pillar, respectively.

[0075] Step six, connect the top cover outer panel 7 to the top surface of the body structure without a B-pillar.

[0076] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A vehicle body structure without a B-pillar, characterized in that: The vehicle comprises a front windshield assembly (1), a roof longitudinal beam (2), a roof rear assembly (3), a back door assembly (4) and a lower body assembly (5), wherein the front end of the roof longitudinal beam (2) is fixedly connected to the middle part of the upper end of the front windshield assembly (1), the rear end of the roof longitudinal beam (2) is fixedly connected to the middle part of the upper end of the roof rear assembly (3), and gull-wing door mounting parts are provided on the left and right sides of the middle part of the roof longitudinal beam (2); The lower end of the front windshield assembly (1) is overlapped and fixed to the front portion of the lower body assembly (5), the lower end of the top cover rear assembly (3) is overlapped and fixed to the rear portion of the lower body assembly (5), and the back door assembly (4) is fixedly connected to the top cover rear assembly (3) and the rear side of the lower body assembly (5); The front windshield assembly (1), the top cover longitudinal beam (2), the top cover rear assembly (3), the back door assembly (4) and the lower body assembly (5) are all integrally formed aluminum alloy die-cast parts.

2. The B-pillar-less vehicle body structure according to claim 1, characterized in that: The front end of the top cover longitudinal beam (2) is screwed and fixed to the middle part of the upper end of the front windshield assembly (1), and the rear end of the top cover longitudinal beam (2) is screwed and fixed to the middle part of the upper end of the top cover rear assembly (3); A positioning component is fixed between the roof longitudinal beam (2) and the front windshield assembly (1) and / or between the roof longitudinal beam (2) and the roof rear assembly (3).

3. The B-pillar-less vehicle body structure according to claim 1, characterized in that: The overlapping gap between the top cover longitudinal beam (2) and the front windshield assembly (1) and the overlapping gap between the top cover longitudinal beam (2) and the top cover rear assembly (3) are both filled with sealant.

4. The B-pillar-less vehicle body structure according to claim 1, characterized in that: The lower end of the front windshield assembly (1) is screwed and / or riveted to the front of the lower vehicle body assembly (5); The lower end of the top cover rear component (3) is screwed and / or riveted to the rear of the lower body component (5).

5. The B-pillar-less vehicle body structure according to claim 1, characterized in that: A guide positioning component is fixed between the lower end of the front windshield assembly (1) and the front portion of the lower body assembly (5) and / or between the lower end of the top cover rear assembly (3) and the rear portion of the lower body assembly (5).

6. The B-pillar-less vehicle body structure according to claim 1, characterized in that: The back door assembly (4) is screwed and / or riveted to the rear side of the top cover rear assembly (3) and the lower body assembly (5).

7. The B-pillar-less vehicle body structure according to claim 1, characterized in that: It also includes side outer panels (6) bonded and fixed to the left and right sides of the vehicle.

8. The B-pillar-less vehicle body structure according to claim 1, characterized in that: It also includes a top cover outer panel (7) which is adhesively fixed to the top surface of the vehicle.

9. A vehicle, characterized in that: It comprises a B-pillar-free vehicle body structure as described in any one of claims 1 to 8.

10. A method for assembling a vehicle body structure without a B-pillar, characterized in that: include: The front windshield assembly (1), the top cover longitudinal beam (2), and the top cover rear assembly (3) are connected to form an upper vehicle body assembly, wherein the front end of the top cover longitudinal beam (2) is fixedly connected to the middle portion of the upper end of the front windshield assembly (1), and the rear end of the top cover longitudinal beam (2) is fixedly connected to the middle portion of the upper end of the top cover rear assembly (3); The upper body assembly is overlapped and fixed to the lower body assembly (5), the lower end of the front windshield assembly (1) is overlapped and fixed to the front portion of the lower body assembly (5), and the lower end of the top cover rear assembly (3) is overlapped and fixed to the rear portion of the lower body assembly (5); The back door assembly (5) is fixedly connected to the top cover rear assembly (3) and the rear side of the lower body assembly (5) to obtain a body structure without a B-pillar.

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