Torque box assembly and automobile

Abstract

The invention belongs to the technical field of body-in-white, and provides a torque box assembly and an automobile. The torque box assembly comprises a lining reinforcing plate, a torque box and a plurality of sleeves; a protruding beam is integrally formed on the surface of the torque box. The lining reinforcing plate comprises a main body part and a plurality of turnups integrally connected with the main body part, the main body part is attached to the protruding beam, and the turnups surround the protruding beam and are fixedly connected with the surface of the torque box; the sleeve penetrates through the lining reinforcing plate and the torque box, and the sleeve is fixedly connected with the lining reinforcing plate and the torque box. Through the fitting design of the lining reinforcing plate and the torque box, multi-flanging surrounding fixing and reinforcing lining edge repair welding, and in combination with the protruding beam reinforcement of the torque box, the torsional rigidity and bending strength of the assembly are obviously improved compared with a traditional structure, and complex loads in the automobile running process can be effectively coped with.

Description

Technical Field

[0001] This invention belongs to the field of body-in-white technology, and specifically relates to a torque box assembly and an automobile. Background Technology

[0002] With the rapid growth of electric vehicle ownership and the continuous upgrading of global automotive collision regulations, the protection of batteries and drivers and occupants in new energy vehicles requires a higher strength body structure, which undoubtedly places more stringent requirements on body structure innovation and poses a greater challenge to body lightweighting and cost reduction.

[0003] The front compartment rear torque box assembly, as an important component of the vehicle body structure, primarily functions to transmit collision forces and also serves as the mounting structure for the subframe. Typically, during a collision, the kinetic energy is transferred from the engine compartment longitudinal beams in the X-direction to the rear longitudinal beams, and then dispersed through the torque box connecting the rear of the left and right longitudinal beams.

[0004] like Figure 1 As shown, this is the existing torque box assembly structure, in which a sleeve c connects the torque box body b and the reinforcing plate a. One end of the sleeve c is welded to the inner surface of the torque box body b, and the other end passes through the reinforcing plate a and is welded thereto. This structural design has obvious defects: First, assembly is achieved solely by bolt tightening, without forming a locking and fixing of the mounting surface. This makes the torque box body b prone to thermal deformation during welding, resulting in an uneven mounting surface and affecting assembly accuracy and structural stability. Second, the torsional stiffness and bending strength of the traditional sleeve c connection method are insufficient, making it difficult to cope with the complex loads during vehicle operation and prone to structural fatigue damage. Third, the bolt connection method carries the risk of loosening, which will affect the service life of the assembly after long-term use and cannot match the life cycle of the entire vehicle. In addition, the existing structural layout is not compact enough, has poor integration, and is difficult to adapt to the spatial layout requirements of the rear of the front compartment. It also cannot provide standardized assembly interfaces for other components, which is not conducive to optimizing the layout of the vehicle's front compartment and improving driving safety and handling stability. Summary of the Invention

[0005] To address the problems in the background art, the present invention proposes a torque box assembly and an automobile.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This application provides a torque box assembly, including an inner reinforcing plate, a torque box, and several sleeves; The surface of the torque box is integrally molded with raised beams; The inner reinforcing plate includes a main body and several flanges integrally connected to the main body. The main body is fitted to the raised beam, and the flanges are fixedly connected to the surface of the torque box around the raised beam. The sleeve pipe penetrates the inner liner reinforcing plate and the torque box, and is fixedly connected with the inner liner reinforcing plate and the torque box respectively.

[0007] Further, the main body part is a sheet metal part matching the shape of the convex beam.

[0008] Further, the flange includes a first flange, a second flange, a third flange and a fourth flange. The first flange is arranged at one end of the main body part. The second flange is arranged at the other end of the main body part away from the first flange. The third flange and the fourth flange are arranged oppositely and are both located between the first flange and the second flange.

[0009] Further, two first flanges are arranged, and the two first flanges are opposite to each other with the main body part as the center. The second flange is arranged with three second flanges, two of which are opposite to each other, and the remaining one is located between the two opposite second flanges.

[0010] Further, the main body part is further provided with a reinforcing flange which is lap welded with the torque box, and the reinforcing flange is located between the two first flanges.

[0011] Further, the main body part is further provided with a reinforcing flange which is lap welded with the torque box, and the reinforcing flange is located between the two first flanges.

[0012] Further, the third flange is further provided with a notch.

[0013] Further, the sleeve pipe includes a first sleeve pipe. The first flange is fixedly connected with the first cylindrical pipe at one end of the first flange. After the first sleeve pipe penetrates the inner liner reinforcing plate and the torque box, the first flange is abutted against the surface of the torque box facing the inner liner reinforcing plate, and the cylindrical pipe penetrates the inner liner reinforcing plate; and the first flange is welded with the torque box to form a weld, and the first cylindrical pipe is welded with the inner liner reinforcing plate to form a weld.

[0014] Further, the sleeve pipe further includes a second sleeve pipe. The second flange is fixedly connected with the second cylindrical pipe at one end of the second flange. After the second sleeve pipe penetrates the inner liner reinforcing plate and the torque box, the second flange is abutted against the surface of the torque box away from the inner liner reinforcing plate, and the cylindrical pipe penetrates the inner liner reinforcing plate and the torque box; and the second flange is welded with the torque box to form a weld, and the second cylindrical pipe is provided with a projection nut at the end away from the second flange, and the projection nut is welded with the inner liner reinforcing plate.

[0015] Further, the torque box is further connected with a side connecting cross beam at one end.

[0016] The application also provides an automobile integrated with the torque box assembly.

[0017] The application has the following beneficial effects: 1. The torque box assembly is fixed by the inner lining reinforcing plate and the torque box through the design of the inner lining reinforcing plate and the torque box, the surrounding of the inner lining reinforcing plate by multiple flanges, the reinforcement of the torque box by the protruding beam, and the obvious improvement of the torsional stiffness and bending strength of the torque box assembly compared with the traditional structure, which can effectively cope with the complex load in the driving process of the automobile. 2. The sleeve is matched and positioned by the flange and the first and second through holes, so that the assembly precision and structural stability are not affected even if the installation surface of the torque box is uneven. 3. The sleeve is fixed by double welding, which avoids the loosening risk of bolt connection and further improves the assembly precision and structural stability. 4. The assembly structure is compact, which can be directly integrated in the rear part of the automobile front compartment, improves the overall structural stability of the automobile body, provides a standardized assembly interface for other components, helps to optimize the layout design of the automobile front compartment, and improves the driving safety and control stability of the automobile.

[0018] Other features and advantages of the present application will be described in the following description, and some will become apparent from the description, or will be understood from the practice of the present application. The purposes and other advantages of the present application can be achieved and obtained by the structures indicated in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 A sectional view of the existing torque box assembly is shown; Figure 2 A structural schematic view of a torque box assembly of the present application is shown; Figure 3 A structural schematic view of an inner lining reinforcing plate of the present application is shown; Figure 4 An exploded view of a torque box assembly of the present application is shown; Figure 5 A front view of a vehicle side connecting cross beam of the present application is shown; Figure 6 A schematic diagram of the structure of the inner surface of the torque box of the present invention is shown; Figure 7 It shows Figure 6 A cross-sectional view of the AA plane; Figure 8 A schematic diagram of the torque box assembly of the present invention is shown, cut out with the second sleeve as the center; Figure 9 An axonometric view of the side connecting beam of the present invention is shown.

[0021] In the diagram: 1. Inner reinforcing plate; 101. Main body; 102. First flange; 103. Second flange; 104. Third flange; 105. Fourth flange; 106. First through hole; 107. Second through hole; 108. Notch; 109. Reinforcing lining; 2. First sleeve; 201. First flange; 202. First columnar tube; 3. Torque box; 301. Raised beam; 4. Side connecting beam; 5. Projection weld nut; 6. Front bulkhead; 7. Weld; 8. Second sleeve; 801. First flange; 802. Second columnar tube; 9. Resistance welding marking. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figure 2 The image shows a torque box assembly, mainly composed of an inner reinforcing plate 1, a torque box 3, and several sleeves. The torque box 3 is the basic component of the assembly, combined with... Figure 4 It is known that the surface of the protruding beam 301 is formed by an integral molding process. The setting of the protruding beam 301 can directly improve the structural rigidity of the torque box 3 itself, provide a fitting reference for the assembly of the inner reinforcing plate 1, and enhance the resistance to deformation during the torque transmission process.

[0024] like Figure 3As shown, the inner reinforcing plate 1 is a sheet metal part, including a main body 101 and several flanges integrally connected to the main body 101. The shape of the main body 101 is adapted to the protruding beam 301 and surface of the torque box 3 to achieve tight assembly. Specifically, a sheet metal structure adapted to the shape of the protruding beam 301 is adopted to ensure that the main body 101 can be completely fitted with the protruding beam 301, maximizing the contact area to improve force transmission efficiency; moreover, a first through hole 106 is opened on the surface of the main body 101 for installing a sleeve; a reinforcing lining edge 109 is also provided at one end, which is fixed to the torque box 3 by lap welding, further improving the connection reliability between the inner reinforcing plate 1 and the torque box 3.

[0025] like Figure 3 As shown, the flanges are fixedly connected to the surface of the torque box 3 around the protruding beam 301, specifically including a first flange 102, a second flange 103, a third flange 104, and a fourth flange 105. The layout and quantity of each flange are designed as follows: Two first flanges 102 are provided, symmetrically distributed at one end of the main body 101, facing away from each other. The two first flanges 102 are connected to the torque box 3 by four resistance welds. The aforementioned reinforcing lining 109 is located between the two first flanges 102 and is connected to the torque box 3 by one resistance weld. Three second flanges 103 are provided, two of which are facing away from each other, and the remaining one is located between the two facing-away second flanges 103, distributed at the end of the main body 101 away from the first flanges 102, thereby improving the connection strength through multi-directional contact. The third flange 104 and the fourth flange 105 are arranged opposite each other and are both located between the first flange 102 and the second flange 103, forming a closed connection trend around the protruding beam 301. The third flange 104 and the fourth flange 105 are connected to the torque box 3 by a total of seven resistance welding points. The surface of the third flange 104 is provided with a second through hole 107, which cooperates with the first through hole 106 of the main body 101 for installing the sleeve. The third flange 104 is also provided with a notch 108 to facilitate positioning and avoidance during the assembly process and improve the ease of installation.

[0026] It should be noted that, based on the first through hole 106 and the second through hole 107, the torque box 3 and the sleeve are connected by MAG welding, typically using three 15mm sections for connection, thus forming a closed cavity structure. This provides effective cross-sectional force, sufficient to support the dynamic stiffness requirements and static strength load requirements required for the chassis frame installation, and to withstand the fatigue and durability issues of sheet metal and connection processes. In a traditional frame structure, the frame is mounted on the bottom surface of the torque box 3 (e.g., Figure 1 As shown, the chassis frame mounting sleeve only achieves bolt tightening and does not bear the responsibility of mounting surface engagement. Torque box 3 is prone to thermal deformation, resulting in uneven mounting surface.

[0027] The sleeves penetrate the inner reinforcing plate 1 and the torque box 3, and are fixedly connected to both respectively, including the first sleeve 2 and the second sleeve 8. The structure and assembly logic of the two sleeves are as follows: like Figure 7 As shown, one end of the first sleeve 2 is provided with a first flange 201 and a first cylindrical tube 202, and the first flange 201 is fixedly connected to one end of the first cylindrical tube 202. During assembly, the first sleeve 2 penetrates the inner lining reinforcing plate 1 and the torque box 3, so that the first flange 201 and the torque box 3 abut against the surface of the inner lining reinforcing plate 1, and the first cylindrical tube 202 penetrates the inner lining reinforcing plate 1; the connection and fixation are achieved by welding. The first flange 201 and the torque box 3 form a weld 7 by metal active gas arc welding (MAG), and the first cylindrical tube 202 is fixed to the inner lining reinforcing plate 1 by MAG welding to form weld 7. Figure 6 It can be seen that weld 7 is evenly distributed around the first sleeve 2. Double welding ensures connection strength, while the flange structure can distribute pressure and avoid local stress concentration.

[0028] It should be noted that, Figure 7 The first flange 201 is set up to both lock the bolts and bear the interlocking function of the mounting surface. This way, the torque box 3 will not cause fluctuations in the frame mounting surface after thermal deformation. Moreover, the mounting surface of this part is thicker than that of the existing sheet metal parts, and the dynamic stiffness of the mounting surface can be increased by 2 to 3 times, thereby achieving the purpose of improvement. Figure 8 Similarly, the structure must not only tighten the bolts and bear the interlocking function of the mounting surface, but also prevent the bottom surface of the torque box 3 from thermally deforming, which would cause unevenness of the chassis mounting surface and lead to torque attenuation and NVH noise at the chassis frame mounting points after the vehicle is driven.

[0029] like Figure 8 As shown, the second sleeve 8 is provided with a second flange 801 and a second columnar tube 802, with one end of the second flange 801 fixedly connected to the second columnar tube 802. During assembly, the second sleeve 8 passes through the inner reinforcing plate 1 and the torque box 3, so that the second flange 801 abuts against the surface of the torque box 3 away from the inner reinforcing plate 1, and the second columnar tube 802 passes through the inner reinforcing plate 1 and the torque box 3. During connection and fixation, the second flange 801 and the torque box 3 are welded to form a weld 7, and a projection weld nut 5 is installed at the end of the second columnar tube 802 away from the second flange 801, and the projection weld nut 5 is welded and fixed to the inner reinforcing plate 1. Through the double fixing method, the reliability of the connection between the sleeve and the main structure is ensured, and a stable interface is provided for the subsequent assembly of external components.

[0030] It should be noted that the projection weld nut 5 is used to connect and install the power battery mounting point. When the vehicle is involved in a frontal collision, the force in the X direction can be transmitted to the battery pack through the rear torque box assembly, thus forming an effective transmission path.

[0031] pass Figure 1 It can be seen that one end of the torque box 3 is also connected to a side connecting beam 4. Through Figure 5 and Figure 9 It can be seen that the connecting crossbeam 4 on this side is U-shaped and has a five-sided welding surface structure. After it is attached to the torque box 3 on five sides, it is connected by resistance welding at multiple points (preferably six points). Resistance welding markings 9 can be set at the welding points (see details). Figure 1 This is sufficient to form a strong reinforcing rib structure. When a collision force is transmitted, it can transmit the force in the Y direction to the body structure on the symmetrical side. At the same time, the cage-like body structure formed by overlapping and closing with the front bulkhead 6 can also improve the overall rigidity and strength, effectively improving vehicle safety and the driving experience of the driver and passengers.

[0032] The present invention also protects an automobile that integrates the aforementioned torque box assembly. The torque box assembly is mounted in the rear of the front compartment of the automobile. Its enhanced structural performance improves the overall rigidity, torsional strength and load-bearing capacity of the automobile body. At the same time, through a standardized sleeve assembly structure, it provides stable support for the installation of other components in the front compartment of the automobile, such as suspension and electrical components, and adapts to the overall assembly requirements of the automobile.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A torque box assembly, characterized in that, Includes an inner reinforcing plate (1), a torque box (3), and several sleeves; The surface of the torque box (3) is integrally formed with a raised beam (301). The inner lining reinforcement plate (1) includes a main body (101) and a plurality of flanges integrally connected to the main body (101). The main body (101) is fitted to the protruding beam (301), and the flanges are fixedly connected to the surface of the torque box (3) around the protruding beam (301). The sleeve passes through the inner lining reinforcement plate (1) and the torque box (3), and the sleeve is fixedly connected to the inner lining reinforcement plate (1) and the torque box (3) respectively.

2. The torque box assembly according to claim 1, characterized in that, The main body (101) is a sheet metal part adapted to the shape of the protruding beam (301).

3. The torque box assembly according to claim 1, characterized in that, The flange includes a first flange (102), a second flange (103), a third flange (104), and a fourth flange (105). A plurality of the first flanges (102) are disposed at one end of the main body (101); A plurality of second flanges (103) are disposed at one end of the main body (101) away from the first flange (102); The third flange (104) and the fourth flange (105) are arranged opposite to each other and are both located between the first flange (102) and the second flange (103).

4. A torque box assembly according to claim 3, characterized in that, There are two first flanges (102), and the two first flanges (102) are opposite to each other with the main body (101) as the center; There are three second flanges (103), two of which are opposite to each other, and the remaining second flange (103) is located between the two opposite second flanges (103).

5. A torque box assembly according to claim 4, characterized in that, One end of the main body (101) is also provided with a reinforcing liner (109) that is welded to the torque box (3), and the reinforcing liner (109) is located between the two first flanges (102).

6. A torque box assembly according to claim 3, characterized in that, The main body (101) has a first through hole (106) on its surface and the third flange (104) has a second through hole (107) on its surface. Both the first through hole (106) and the second through hole (107) are used to install the sleeve.

7. A torque box assembly according to claim 3, characterized in that, The third flange (104) is also provided with a notch (108).

8. A torque box assembly according to claim 1, characterized in that, The sleeve includes a first sleeve (2); The first sleeve (2) is provided with a first flange (201) and a first columnar tube (202) at one end, and the first flange (201) is fixedly connected to one end of the first columnar tube (202); After the first sleeve (2) passes through the inner lining reinforcement plate (1) and the torque box (3), the first flange (201) abuts against the surface of the torque box (3) facing the inner lining reinforcement plate (1), and the first columnar tube (202) passes through the inner lining reinforcement plate (1); and the first flange (201) is welded to the torque box (3) to form a weld (7), and the first columnar tube (202) is welded to the inner lining reinforcement plate (1) to form a weld (7).

9. A torque box assembly according to claim 3 or 8, characterized in that, The sleeve also includes a second sleeve (8); The second sleeve (8) is provided with a second flange (801) and a second columnar tube (802), and the second flange (801) is fixedly connected to one end of the second columnar tube (802); After the second sleeve (8) passes through the inner lining reinforcement plate (1) and the torque box (3), the second flange (801) abuts against the surface of the torque box (3) away from the inner lining reinforcement plate (1), and the columnar tube passes through the inner lining reinforcement plate (1) and the torque box (3); and the second flange (801) is welded to the torque box (3) to form a weld (7), and a projection weld nut (5) is installed at the end of the second columnar tube (802) away from the second flange (801), and the projection weld nut (5) is welded to the inner lining reinforcement plate (1).

10. A torque box assembly according to claim 1, characterized in that, One end of the torque box (3) is also connected to a side connecting beam (4).

11. A car, characterized in that, The assembly integrates a torque box assembly as described in any one of claims 1-10.

Images