Pre-buckling assembly of body-in-white and vehicle

Abstract

The utility model discloses a pre-buckling assembly of a body in white and a vehicle, relates to the technical field of vehicles, and aims to solve the technical problem that the production and manufacturing cost of the pre-buckling assembly is relatively high. The pre-buckling assembly comprises a lower vehicle body welding assembly, a side wall welding assembly and a buckling piece, a limiting groove is formed in the end of the lower vehicle body welding assembly, the buckling piece is connected to the side, facing the lower vehicle body welding assembly, of the side wall welding assembly, and at least part of the buckling piece is located in the limiting groove so that the lower vehicle body welding assembly and the side wall welding assembly can be pre-buckled.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a pre-fastened assembly for a body-in-white and a vehicle. Background Technology

[0002] As the culmination of modern industrial civilization, vehicles undergo a series of complex and precise processes from conceptual design to final product delivery. While the pre-fastening of the body-in-white welding assembly is not frequently mentioned, it plays a crucial role in ensuring vehicle performance, quality, and production efficiency.

[0003] Typically, the body-in-white welding assembly of a vehicle requires pre-clamping before welding. Pre-clamping ensures that body parts are in the correct position and condition before welding, effectively controlling the relative positional accuracy between components. Furthermore, pre-clamped parts are accurately positioned during welding, eliminating the need for extensive adjustments and alignment during the welding process, thus reducing welding time and improving production efficiency.

[0004] In related technologies, patent CN218396406U discloses a pre-fastening assembly for automotive body welding. This pre-fastening assembly includes a lower body welding assembly, a side panel welding assembly, and a pre-fastening structure. The A-pillar, B-pillar, and C-pillar of the side panel welding assembly all have pre-fastening positions at their lower ends. The pre-fastening structure is located at these positions and is a pre-fastening flange with its opening facing downwards. In use, the pre-fastening structure is hung upside down on the lower body's overlapping parts from top to bottom, connecting the side panel welding assembly and the lower body welding assembly into a single unit. This eliminates the need for pre-fastening tooling for bending and pre-fastening, satisfying the requirements of flexible production lines for multiple vehicle models and saving on the cost of pre-fastening tooling. However, the design of the pre-fastening flange requires consideration of parameters such as its opening size, flange angle, and thickness. It must ensure sufficient strength and rigidity for reliable connection while also meeting the convenience and flexibility of assembly. This places high demands on manufacturing and increases production costs. Utility Model Content

[0005] This application provides a pre-fastening assembly for a body-in-white and a vehicle, which addresses the technical problem of high manufacturing costs for pre-fastening assemblies.

[0006] According to a first aspect of this application, a pre-fastening assembly for a body-in-white is provided, comprising: a lower body welding assembly, a side panel welding assembly, and a fastener. The lower body welding assembly has a limiting groove at its end. The side panel welding assembly is connected to the side facing the lower body welding assembly with the fastener. At least a portion of the fastener is located within the limiting groove, so that the lower body welding assembly and the side panel welding assembly are pre-fastened.

[0007] Based on the aforementioned technical means, the limiting groove can cooperate with the fastening component, thus ensuring the accurate positioning of the side panel welding assembly and the lower body welding assembly during pre-fastening. Since the fastening component is located within the limiting groove, it restricts the horizontal and vertical movement of the side panel welding assembly, fixing their relative positions and providing a precise positioning basis for subsequent welding, thereby improving the assembly accuracy of the vehicle body.

[0008] Furthermore, in the manufacturing process, the limiting groove of the lower body welding assembly of this application can be obtained by stamping or machining, while the fasteners on the side welding assembly can also be manufactured using conventional processes such as stamping or welding. These processes are common in automobile manufacturing, are technically mature, have easily controllable processing accuracy, and are relatively easy to manufacture. Compared to related technologies that use a pre-fastening structure with a pre-fastening flange to hang the pre-fastening assembly inverted with the lower body, the processing accuracy and difficulty of this application are both lower, which helps to improve the production efficiency of the pre-fastening assembly and reduce the production cost of the pre-fastening assembly.

[0009] In this way, by cooperating with the fastener and the limiting groove, the lower body welding assembly and the side wall welding assembly can be quickly pre-fastened. Compared with the pre-fastening structure with pre-fastening flange and hanging it upside down with the lower body, the assembly steps and time are reduced, production efficiency is improved and production costs are reduced.

[0010] In one possible implementation, the limiting groove is a U-shaped groove.

[0011] Based on the aforementioned technical means, the U-shaped groove provides three-sided constraint for the fasteners. Compared to other groove shapes, the U-shaped groove better restricts the movement of the fasteners in the horizontal and vertical directions, making the pre-fastening between the side panel welding assembly and the lower body welding assembly more secure, thus improving the stability and reliability of the vehicle body assembly. Furthermore, the larger opening of the U-shaped groove makes it easier to align and insert the fasteners during assembly, requiring relatively lower skill levels from assembly workers and reducing the risk of poor fastening due to assembly errors. Even if the fasteners deviate slightly during insertion, the shape of the U-shaped groove can guide them to the correct position to a certain extent, providing good fault tolerance and helping to improve assembly efficiency and the first-time assembly success rate.

[0012] In one possible implementation, the fastener includes a stud, one side of which is connected to the side panel welding assembly and protrudes from the end face of the side panel welding assembly near the lower body welding assembly, and the other side of the stud is adapted to abut against a U-shaped groove.

[0013] According to the aforementioned technical means, since one side of the stud connects to the side panel welding assembly and the other side abuts against the U-shaped groove, and the stud protrudes from the end face of the side panel welding assembly near the lower body welding assembly, the stud, when engaged with the U-shaped groove, can provide accurate positioning for the side panel welding assembly. Because the stud's position is relatively fixed and its engagement with the U-shaped groove is highly precise, it ensures that the positional deviation of the side panel welding assembly is controlled within a small range when assembled onto the lower body welding assembly, which is beneficial for improving the overall assembly quality and dimensional accuracy of the vehicle body.

[0014] Furthermore, studs are common standard parts with high versatility. Therefore, in the body-in-white design of different vehicle models, different specifications of studs can be selected as fasteners based on the specific body structure and assembly requirements, eliminating the need to design special fastening structures for each model. This helps reduce design and manufacturing costs and improve production efficiency.

[0015] In one possible implementation, the circumferential wall of the stud is in line contact or surface contact with the inner wall of the U-shaped groove.

[0016] According to the aforementioned technical means, when the circumferential wall of the stud contacts the inner wall of the U-shaped groove, for example, the contact point between the stud and the U-shaped groove forms a curve. This linear contact can precisely limit the position of the stud within the U-shaped groove, thereby increasing the relative positional accuracy between the side panel welding assembly and the lower body welding assembly, which is beneficial for ensuring the overall assembly accuracy of the vehicle body. When the circumferential wall of the stud contacts the inner wall of the U-shaped groove, the contact area between the stud and the U-shaped groove is larger. This allows the stud to distribute the external forces borne by the vehicle body more evenly, reducing the pressure per unit area and ensuring higher load-bearing capacity. This better withstands various loads during vehicle use, improving the stability and reliability of the vehicle body structure.

[0017] In one possible implementation, a limiting portion is provided on the stud, which is adapted to restrict the lower body welding assembly from sliding along the axial direction of the stud when the limiting groove abuts against the stud.

[0018] According to the above technical means, when the limiting groove abuts against the stud, the limiting part can prevent the lower body welding assembly from sliding along the axial direction of the stud, ensuring that the relative position of the lower body welding assembly and the side wall welding assembly is fixed in this direction, improving the accuracy and stability of the body assembly, and helping to ensure the dimensional accuracy of the overall body structure.

[0019] In one possible implementation, the stud includes a stud body and a head, one end of the stud body being connected to the head, and a limiting portion being provided on the circumferential wall surface of the stud body on the side away from the head.

[0020] Based on the aforementioned technical means, a limiting part is provided on the circumferential wall surface of the column on the side away from the head. This allows for precise restriction of the sliding of the lower body welded assembly along the stud axial direction when the stud engages with the limiting groove of the lower body welded assembly. Because the limiting part is located at a specific position on the column, when the stud extends into the limiting groove, the limiting part interacts with the inner wall of the limiting groove, preventing the lower body welded assembly from displacing in the axial direction. This ensures the relative positional accuracy between the lower body welded assembly and the side panel welded assembly, contributing to improved overall vehicle assembly quality.

[0021] In one possible implementation, an external thread is provided on the circumferential wall surface of the column on the side away from the head, and the external thread constitutes a limiting part.

[0022] Based on the above technical means, the external thread can not only cooperate with components such as nuts to play a role in connection and fastening, but also act as a limiting part to restrict the sliding of the lower body welded assembly along the stud axis, thus realizing the integration of functions, reducing the number and complexity of parts, and helping to reduce production costs and vehicle weight.

[0023] In one possible implementation, the pre-locking assembly further includes a nut located on the side of the sidewall weld assembly opposite to the head, adapted to be threaded into the external thread of the column.

[0024] Using the aforementioned technical methods, a significant preload can be generated between the side panel welded assembly and the lower body welded assembly by tightening nuts, thereby achieving a tight connection. This connection method can effectively resist various external forces experienced by the vehicle body during use, such as vibration and impact, ensuring the stability and reliability of the vehicle body structure.

[0025] In one possible implementation, the side panel welding assembly includes: a lower end of the B-pillar and a lower end of the C-pillar, and the fasteners include: a first fastener connected to the lower end of the B-pillar and a second fastener connected to the lower end of the C-pillar;

[0026] The end of the lower body welding assembly is provided with a first limiting groove and a second limiting groove, at least a portion of the first fastener is located in the first limiting groove, and at least a portion of the second fastener is located in the second limiting groove.

[0027] Based on the aforementioned technical means, by setting a first fastening member at the lower end of the B-pillar and a second fastening member at the lower end of the C-pillar, which respectively cooperate with the first and second limiting grooves on the lower body welding assembly, positioning of the side panel welding assembly and the lower body welding assembly at multiple locations can be achieved. This multi-point positioning method can effectively limit the movement of the side panel welding assembly during assembly, improve the stability of the connection, and ensure the dimensional accuracy of the overall vehicle body structure. Furthermore, the B-pillar and C-pillar are important structural components of the vehicle body, bearing significant loads during vehicle operation. Setting the fastening members at the lower ends of the B-pillar and C-pillar, and firmly connecting them to the lower body welding assembly, can enhance the connection strength of the vehicle body at these critical locations, effectively distribute and transfer loads, improve the vehicle body's resistance to deformation and durability, and enhance vehicle safety performance.

[0028] According to a second aspect of this application, a vehicle is also provided, the vehicle including the pre-fastening component described in the first aspect above.

[0029] Since the vehicle provided in this application includes the pre-fastening component in the first aspect, it can solve the same technical problems as the pre-fastening component described above and achieve the same technical effects, so it will not be described again here. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0031] Figure 1 This illustration shows a partial structural diagram of a lower body welding assembly provided in an embodiment of this application;

[0032] Figure 2 This illustration shows a structural schematic diagram of the connection between the lower body welding assembly and the side wall welding assembly according to an embodiment of this application;

[0033] Figure 3 This illustration shows a structural schematic diagram from another perspective of the connection between the lower body welding assembly and the side wall welding assembly provided in an embodiment of this application;

[0034] Figure 4 A schematic diagram of the structure of a fastener provided in an embodiment of this application is shown.

[0035] Icon labels:

[0036] 100-Pre-fastened component;

[0037] 10-Lower body welding assembly; 11-Limiting groove; 111-First limiting groove; 112-Second limiting groove;

[0038] 20 - Side panel welding assembly; 21 - Lower end of B-pillar; 22 - Lower end of C-pillar;

[0039] 30-Fastener; 30A-Stud; 30A1-Pillar; 30A2-Head; 31-First Fastener; 32-Second Fastener. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0044] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0045] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0046] In a first aspect, embodiments of this application provide a pre-fastening component for a body-in-white, such as... Figure 1 , Figure 2 and Figure 3 As shown, the pre-fastening assembly 100 includes a lower body welding assembly 10, a side panel welding assembly 20, and a fastening element 30. The body-in-white refers to the welded assembly of the vehicle body structural components and body panels. This body-in-white is made of high-strength steel or aluminum alloy and includes longitudinal beams, cross beams, and pillars, providing basic support and strength for the vehicle body and bearing various loads during vehicle operation.

[0047] It should be noted that the lower body welding assembly 10 is an important component of the automobile body-in-white. This lower body welding assembly 10 may include: a floor assembly, longitudinal and transverse beams, suspension mounting brackets, and engine compartment components, etc. As the lower structure of the vehicle body, the lower body welding assembly 10 bears the weight of the entire vehicle. For example, it can support the weight of components including the engine, transmission, seats, passengers, and luggage, and distribute this weight evenly to the wheels, ensuring the vehicle's driving stability and safety.

[0048] The side panel welding assembly 20 is mainly located on both sides of the vehicle body, serving to connect various parts of the vehicle body, protect passengers, and support the body panels. This side panel welding assembly 20 may include: outer side panel, inner side panel, pillars (such as A-pillars, B-pillars, and C-pillars), sill beams, etc. As an important component of the vehicle body structure, the side panel welding assembly 20 connects the top, bottom, front, and rear of the vehicle body to form a complete body frame, providing the necessary strength and rigidity to ensure the stability and reliability of the vehicle body under various driving conditions.

[0049] In addition, a limiting groove 11 is provided at the end of the lower body welding assembly 10, that is, a limiting groove 11 is provided at the end of the lower body welding assembly 10 near the side wall welding. A fastening member 30 is connected to the side of the side wall welding assembly 20 facing the lower body welding assembly 10. At least part of the fastening member 30 is located in the limiting groove 11 so that the lower body welding assembly 10 and the side wall welding assembly 20 are pre-fastened.

[0050] Pre-fastening refers to the process of using a specific structure (such as the cooperation between the fastener 30 and the limiting groove 11) to achieve a preliminary and relatively fixed connection state for the relevant parts of the automobile body (such as the side panel welding assembly 20 and the lower body welding assembly 10) before the final welding and fixing, so as to provide a basis for subsequent precise adjustment and welding operations.

[0051] Because the limiting groove 11 can cooperate with the fastener 30, the side panel welding assembly 20 and the lower body welding assembly 10 can be accurately positioned during pre-fastening. Since the fastener 30 is partially located within the limiting groove 11, it restricts the movement of the side panel welding assembly 20 in the horizontal and vertical directions, fixing their relative positions and providing a precise positioning basis for subsequent welding, which helps to improve the assembly accuracy of the vehicle body.

[0052] Furthermore, in the manufacturing process, the limiting groove 11 of the lower body welding assembly 10 can be obtained by stamping or machining, while the fastener 30 on the side welding assembly 20 can also be manufactured using conventional processes such as stamping or welding. These processes are common in automobile manufacturing, are technically mature, have easily controllable processing accuracy, and are relatively easy to manufacture. Compared to related technologies that use a pre-fastening structure with a pre-fastening flange to hang the lower body upside down, the processing accuracy and difficulty of this application are both lower, which helps to improve the production efficiency of the pre-fastening assembly 100 and reduce the production cost of the pre-fastening assembly 100.

[0053] In this way, by cooperating with the fastener 30 and the limiting groove 11, the lower body welding assembly 10 and the side wall welding assembly 20 can be quickly pre-fastened. Compared with the pre-fastening structure with pre-fastening flange and hanging it upside down with the lower body, the assembly steps and time are reduced, the production efficiency is improved and the production cost is reduced.

[0054] In some embodiments of this application, the limiting groove 11 is a U-shaped groove, that is, the limiting groove 11 has a "U" shape design. Since the shape of the U-shaped groove can provide three-sided constraint for the fastener 30, compared with other shapes of grooves, the U-shaped groove can better restrict the movement of the fastener 30 in the horizontal and vertical directions, making the pre-fastening of the side panel welding assembly 20 and the lower body welding assembly 10 more stable, and improving the stability and reliability of the vehicle body assembly. In addition, the opening of the U-shaped groove is relatively large, making it easier for the fastener 30 to be aligned and inserted into the groove during the assembly process. This requires relatively low operational skills from the assembly workers and reduces the problem of poor fastening caused by assembly errors. Even if the fastener 30 deviates slightly during insertion, the shape of the U-shaped groove can guide the fastener 30 to be correctly positioned to a certain extent, which has good fault tolerance and helps to improve assembly efficiency and the success rate of first-time assembly.

[0055] In some other embodiments of this application, the limiting groove 11 can also be a V-shaped groove. The V-shaped limiting groove 11 has good guiding properties, can guide the fastener 30 to accurately enter the limiting groove 11, and can clamp the fastener 30, making it more stable in the limiting groove 11.

[0056] In other embodiments of this application, the limiting groove 11 can also be a rectangular groove. The rectangular groove has a simple shape, is easy to process, and can provide a larger contact area, making the connection between the fastener 30 and the limiting groove 11 more stable.

[0057] In some embodiments of this application, the fastener 30 may be a strip-shaped, column-shaped, or cylindrical structure, with one side of the fastener 30 connected to the side wall welding assembly 20. The other side of the fastener 30 abuts against the U-shaped groove.

[0058] In other embodiments of this application, such as Figure 4 As shown, the fastener 30 includes a stud 30A, one side of which is connected to the side panel welding assembly 20. Optionally, the stud 30A can be fixedly connected to the side panel welding assembly 20 by means of bonding, threaded connection, welding, snap-fit, etc. In addition, the stud 30A protrudes from the end face of the side panel welding assembly 20 near the lower body welding assembly 10, and the other side of the stud 30A is adapted to abut against the U-shaped groove.

[0059] Optionally, the circumferential wall of the stud 30A makes line contact with the inner wall of the U-shaped groove. For example, the contact point between the stud 30A and the U-shaped groove forms a curve. This line contact can precisely limit the position of the stud 30A within the U-shaped groove, thereby improving the relative positional accuracy between the side panel welding assembly 20 and the lower body welding assembly 10, which helps to ensure the overall assembly accuracy of the vehicle body.

[0060] Optionally, the circumferential wall of the stud 30A contacts the inner wall of the U-shaped groove. This results in a larger contact area between the stud 30A and the U-shaped groove, allowing the stud 30A to distribute the external forces borne by the vehicle body more evenly, reducing the pressure per unit area, ensuring higher load-bearing capacity, and thus better withstanding various loads during vehicle use, improving the stability and reliability of the vehicle body structure.

[0061] Since one side of the stud 30A connects to the side panel welding assembly 20, and the other side abuts against the U-shaped groove, and the stud 30A protrudes from the end face of the side panel welding assembly 20 near the lower body welding assembly 10, the stud 30A, when engaged with the U-shaped groove, can provide accurate positioning for the side panel welding assembly 20. Because the position of the stud 30A is relatively fixed and the engagement precision with the U-shaped groove is high, it ensures that the positional deviation of the side panel welding assembly 20 is controlled within a small range when assembled onto the lower body welding assembly 10, which is beneficial to improving the overall assembly quality and dimensional accuracy of the vehicle body.

[0062] Furthermore, stud 30A is a common standard part with high versatility. Therefore, in the body-in-white design of different vehicle models, different specifications of stud 30A can be selected as the fastening component 30 according to the specific body structure and assembly requirements, eliminating the need to design special fastening structures for each vehicle model. This helps reduce design and manufacturing costs and improve production efficiency.

[0063] In some embodiments of this application, a limiting portion is provided on the stud 30A. The limiting portion is adapted to restrict the lower body welding assembly 10 from sliding axially along the stud 30A when the limiting groove 11 abuts against the stud 30A. When the limiting groove 11 abuts against the stud 30A, the limiting portion can prevent the lower body welding assembly 10 from sliding axially along the stud 30A, ensuring that the relative position of the lower body welding assembly 10 and the side panel welding assembly 20 is fixed in this direction, improving the accuracy and stability of the body assembly, and helping to ensure the dimensional accuracy and consistency of the overall body structure.

[0064] It should be noted that the stud 30A may include a stud body 30A1 and a head 30A2, and the stud body 30A1 and the head 30A2 may be an integral structure.

[0065] In one possible structural design, one end of the column 30A1 is connected to the head 30A2, and a limiting part is provided on the circumferential wall surface of the column 30A1 on the side away from the head 30A2. Because the limiting part is provided on the circumferential wall surface of the column 30A1 on the side away from the head 30A2, the sliding of the lower body welding assembly 10 along the axial direction of the stud 30A can be precisely limited when the stud 30A engages with the limiting groove 11 of the lower body welding assembly 10. Since the limiting part is located at a specific position on the column 30A1, when the stud 30A extends into the limiting groove 11, the limiting part interacts with the inner wall of the limiting groove 11, preventing the lower body welding assembly 10 from displacing in the axial direction. This ensures the relative positional accuracy between the lower body welding assembly 10 and the side panel welding assembly 20, contributing to improved overall vehicle assembly quality.

[0066] For example, the circumferential wall surface of the column 30A1 away from the head 30A2 is provided with an external thread, which constitutes a limiting part. In this way, the external thread can both cooperate with components such as nuts to provide a connection and fastening function, and also act as a limiting part to restrict the lower body welded assembly 10 from sliding along the axial direction of the stud 30A, thereby achieving functional integration, reducing the number and complexity of parts, and helping to reduce production costs and vehicle weight.

[0067] In another possible structural design, one end of the stud 30A1 is connected to the head 30A2, and a limiting groove is provided between the other end of the stud 30A and the head 30A2, which constitutes a limiting part. In this way, the limiting groove can prevent the lower body welding assembly 10 from sliding along the axial direction of the stud 30A, ensuring that the relative position of the lower body welding assembly 10 and the side wall welding assembly 20 is fixed in this direction, improving the accuracy and stability of the body assembly, and helping to ensure the dimensional accuracy and consistency of the overall body structure.

[0068] In some embodiments of this application, the pre-fastening assembly 100 further includes a nut located on the side of the sidewall welding assembly 20 away from the head 30A2, and is adapted to be threadedly connected to the external thread of the column 30A1.

[0069] In this way, a large preload can be generated between the side panel welding assembly 20 and the lower body welding assembly 10 by tightening the nuts, thereby achieving a tight connection. This connection method can effectively resist various external forces, such as vibration and impact, that the vehicle body is subjected to during use, ensuring the stability and reliability of the vehicle body structure.

[0070] In some embodiments of this application, the side panel welding assembly 20 includes: a lower end of B-pillar 21 and a lower end of C-pillar 22; the fastener 30 includes: a first fastener 31 connected to the lower end of B-pillar 21 and a second fastener 32 connected to the lower end of C-pillar 22; the lower body welding assembly 10 has a first limiting groove 111 and a second limiting groove 112 at its end, at least a portion of the first fastener 31 is located in the first limiting groove 111, and at least a portion of the second fastener 32 is located in the second limiting groove 112.

[0071] Thus, by setting a first fastening member 31 at the lower end 21 of the B-pillar and a second fastening member 32 at the lower end 22 of the C-pillar, which respectively cooperate with the first limiting groove 111 and the second limiting groove 112 on the lower body welding assembly 10, the side wall welding assembly 20 and the lower body welding assembly 10 can be positioned at multiple locations. This multi-point positioning method can effectively limit the movement of the side wall welding assembly 20 during assembly, improve the stability of the connection, and ensure the dimensional accuracy of the overall vehicle body structure. In addition, the B-pillar and C-pillar are important structural components of the vehicle body, bearing significant loads during vehicle operation. Setting the fastening members 30 at the lower ends of the B-pillar and C-pillar and firmly connecting them to the lower body welding assembly 10 can enhance the connection strength of the vehicle body in these critical locations, effectively distribute and transfer loads, improve the deformation resistance and durability of the vehicle body, and enhance the vehicle's safety performance.

[0072] Secondly, embodiments of this application also provide a vehicle, including a pre-fastening component 100. The pre-fastening component 100 can be referred to in the description of the first aspect above, and will not be repeated here.

[0073] Because the limiting groove 11 can cooperate with the fastener 30, the side panel welding assembly 20 and the lower body welding assembly 10 can be accurately positioned during pre-fastening. Since the fastener 30 is partially located within the limiting groove 11, it restricts the movement of the side panel welding assembly 20 in the horizontal and vertical directions, fixing their relative positions and providing a precise positioning basis for subsequent welding, which helps to improve the assembly accuracy of the vehicle.

[0074] In addition, by cooperating with the fastener 30 and the limiting groove 11, the lower body welding assembly 10 and the side wall welding assembly 20 can be quickly pre-fastened. Compared with the pre-fastening structure with pre-fastening flange and hanging it upside down with the lower body, the assembly steps and time are reduced, production efficiency is improved and production costs are reduced.

[0075] In understanding the scope of this application, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of a described feature, element, component, group, whole, and / or step, but do not exclude the presence of other undescribed features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "comprising," "having," and their derivatives.

[0076] The term "attached" or "joined" as used herein includes: a construction in which one element is directly fixed to another element by fixing it directly to another element; a construction in which one element is indirectly fixed to another element by fixing it to an intermediate member, which in turn is fixed to another element; and a construction in which one element is integral with another element, that is, one element is substantially part of another element. This definition also applies to words with similar meanings, such as "connect," "joint," "couple," "install," "adhere," "fix," and their derivatives. Finally, degree terms such as "substantially," "approximately," and "approximately" as used herein indicate the amount of deviation from which modifications to the terminology do not significantly alter the final result.

[0077] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0078] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application.

Claims

1. A pre-fastening assembly for a body-in-white, characterized in that, include: The vehicle body welding assembly (10), the side wall welding assembly (20), and the fastener (30) are provided. The end of the lower body welding assembly (10) is provided with a limiting groove (11). The side wall welding assembly (20) is connected to the fastener (30) on the side facing the lower body welding assembly (10). At least a portion of the fastener (30) is located in the limiting groove (11) so that the lower body welding assembly (10) and the side wall welding assembly (20) are pre-fastened.

2. The pre-fastening assembly according to claim 1, characterized in that, The limiting groove (11) is a U-shaped groove.

3. The pre-fastening assembly according to claim 2, characterized in that, The fastener (30) includes a stud (30A), one side of which is connected to the side wall welding assembly (20), and the stud (30A) protrudes from the end face of the side wall welding assembly (20) near the lower body welding assembly (10), and the other side of the stud (30A) is adapted to abut against the U-shaped groove.

4. The pre-fastening assembly according to claim 3, characterized in that, The circumferential wall of the stud (30A) is in line contact or surface contact with the inner wall of the U-shaped groove.

5. The pre-fastening assembly according to claim 3 or 4, characterized in that, The stud (30A) is provided with a limiting part, which is adapted to restrict the lower body welding assembly (10) from sliding along the axial direction of the stud (30A) when the limiting groove abuts against the stud (30A).

6. The pre-fastening assembly according to claim 5, characterized in that, The stud (30A) includes a stud (30A1) and a head (30A2), one end of the stud (30A1) is connected to the head (30A2), and the limiting part is provided on the circumferential wall surface of the stud (30A1) away from the head (30A2).

7. The pre-fastening assembly according to claim 6, characterized in that, The column (30A1) has an external thread on the circumferential wall surface away from the head (30A2), and the external thread constitutes the limiting part.

8. The pre-fastening assembly according to claim 7, characterized in that, It also includes a nut, located on the side of the side weld assembly (20) away from the head (30A2), adapted to be threadedly connected to the external thread of the column (30A1).

9. The pre-fastening assembly according to claim 8, characterized in that, The side wall welding assembly (20) includes: a lower end of B-pillar (21) and a lower end of C-pillar (22), and the fastener (30) includes: a first fastener (31) connected to the lower end of B-pillar (21) and a second fastener (32) connected to the lower end of C-pillar (22); The lower body welding assembly (10) is provided with a first limiting groove (111) and a second limiting groove (112) at its end. At least a portion of the first fastener (31) is located in the first limiting groove (111), and at least a portion of the second fastener (32) is located in the second limiting groove (112).

10. A vehicle, characterized in that, Includes the pre-fastening component (100) as described in any one of claims 1-9.

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