Vehicle body assembly and vehicle

Abstract

A vehicle body assembly and a vehicle. The vehicle body assembly comprises a back door frame, a rear floor, a rear floor upper cross beam, a top cover rear cross beam, two side inner panels, two rear wheel housings, two joints and two reinforcement members, wherein the back door frame comprises two side frames, the rear floor upper cross beam is connected between the two joints, the top cover rear cross beam is connected between the two side frames, each reinforcement member is connected between the corresponding side frame and the corresponding joint and comprises a first reinforcement member and a second reinforcement member connected to each other, and a first cavity is provided between the rear floor, each rear wheel housing, and the joint corresponding to the rear wheel housing. By means of the above-mentioned structure, the rigidity and structural strength of the vehicle body can be enhanced, and the stability of the vehicle body and the safety of passengers in the vehicle can be improved.

Description

Body assembly and vehicle

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202520461170.3, filed on March 14, 2025, entitled "Body Assembly and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of vehicle body technology, and more specifically, to a vehicle body assembly and a vehicle. Background Technology

[0004] During vehicle operation, the rear structure is continuously subjected to vibrations and impacts from the ground, affecting the overall structural strength and rigidity, and posing significant risks to vehicle operation and safety. Therefore, strengthening the structural strength of the vehicle body is a crucial issue in the design of the vehicle assembly. Summary of the Invention

[0005] The purpose of this disclosure is to provide a body assembly and a vehicle to solve the technical problem of how to increase the structural strength of the body.

[0006] To achieve the above objectives, this disclosure provides a vehicle body assembly including a rear tailgate frame, a rear floor, a rear floor crossbeam, a roof rear crossbeam, two opposing side panel inner panels, two opposing rear wheel arches, two opposing joints, and two opposing reinforcing members.

[0007] The rear door frame includes two opposing side frames. A rear floor crossbeam is located above the rear floor and connected between the two joints. A top cover rear crossbeam is connected between the two side frames. A reinforcing member is connected between the corresponding side frame and the corresponding joint. Each reinforcing member includes a first reinforcing member and a second reinforcing member connected together. The first reinforcing member is located on the corresponding rear wheel arch and connected to the corresponding joint. The second reinforcing member is located on the corresponding inner side panel and connected to the corresponding side frame.

[0008] A first cavity is provided between the rear floor, the rear wheel arch, and the joint corresponding to the rear wheel arch.

[0009] Optionally, the rear floor, the rear wheel arch, and the joint corresponding to the rear wheel arch are configured as at least a portion of the cavity wall of the first cavity.

[0010] Optionally, the first cavity is used to accommodate a high-voltage wiring harness or a low-voltage wiring harness.

[0011] Optionally, the first cavity is provided with a protective sleeve for covering the high-voltage wire harness or the low-voltage wire harness.

[0012] Optionally, a second cavity is formed between the first reinforcing member and the corresponding rear wheel cover, wherein the first reinforcing member and the corresponding rear wheel cover are configured as at least a portion of the cavity wall of the second cavity.

[0013] Optionally, the second cavity is located at the arc-shaped position where the vertical and circumferential surfaces of the rear wheel cover connect.

[0014] Optionally, the rear wheel cover has a boss on the side facing the corresponding connector, and the first reinforcing member and the corresponding connector are connected at the position of the corresponding boss.

[0015] Optionally, the side frame includes a connected frame body and a transition portion, the rear crossbeam of the top cover is connected between the transition portions of the two side frames, and the upper end of the second reinforcing member is connected to the corresponding transition portion.

[0016] Optionally, at the overlap position of the second reinforcement and the corresponding adapter, the second reinforcement has an overlap edge extending along the width direction of the vehicle assembly.

[0017] Optionally, the vehicle body assembly includes two reinforcing beams, which are disposed on the corresponding inner side panels and located behind the corresponding reinforcing members. The first end of the reinforcing beam is connected to the corresponding side frame, and the second end of the reinforcing beam is connected to the corresponding rear wheel arch. The rear wheel arch is provided with three ribs, one of which is connected to the reinforcing beam, and the rib connected to the reinforcing beam is located between the other two ribs.

[0018] Optionally, the projections of the rear roof crossbeam and the rear floor crossbeam in the height direction of the vehicle assembly at least partially overlap; and / or,

[0019] A rear longitudinal beam is provided below the rear floor, and a subframe mounting seat is provided on the rear longitudinal beam. The projection of at least one of the crossbeam on the rear floor and the joint at least partially coincides with the projection of the corresponding subframe mounting seat in the height direction of the vehicle assembly.

[0020] Optionally, a subframe mounting reinforcement liner is provided below the rear floor. The subframe mounting reinforcement liner and the subframe mounting seat are at least partially opposite each other in the width direction of the vehicle assembly. At least one of the rear longitudinal beam and the subframe mounting seat is connected to the corresponding subframe mounting reinforcement liner. The projection of at least one of the crossbeam on the rear floor and the joint at least partially coincides with the projection of the corresponding subframe mounting reinforcement liner in the height direction of the vehicle assembly.

[0021] According to a second aspect of this disclosure, a vehicle is provided, including the aforementioned body assembly.

[0022] Through the above technical solution, in the vehicle assembly provided in this disclosure, the rear crossbeam of the roof, the two side frames of the tailgate frame, the two first reinforcing members and the two second reinforcing members, the two joints, and the crossbeam on the rear floor together form a closed first ring structure. This ring structure design enhances the body rigidity and structural strength at the rear wheel arch location. In the event of a rollover or side collision, the ring structure can better disperse and absorb collision energy, reducing the direct impact on the passenger compartment and better protecting the safety of the passengers inside. Furthermore, the second reinforcing members are connected to the side frames of the tailgate frame, supporting the tailgate frame and improving the stability of the tailgate at the tailgate frame. Additionally, a first cavity is provided between the rear floor, the rear wheel arch, and the joint corresponding to the rear wheel arch. This allows external loads to be transferred from the first reinforcing members through the joints to the crossbeam on the rear floor, preventing the load from being directly transferred to the rear floor and avoiding large-area deformation of the rear floor.

[0023] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 is a schematic diagram of a portion of the structure of a vehicle body assembly provided in an exemplary embodiment of the present disclosure.

[0026] Figure 2 is a schematic diagram of a portion of the structure of a vehicle body assembly provided in an exemplary embodiment of the present disclosure.

[0027] Figure 3 is a schematic diagram of a partial structure of a vehicle body assembly provided in an exemplary embodiment of the present disclosure, wherein a first annular structure is shown.

[0028] Figure 4 is a partially enlarged view of the first annular structure in the vehicle body assembly provided by an exemplary embodiment of the present disclosure.

[0029] Figure 5 is a partial enlarged view of the overlap position of the second reinforcing member and the adapter in a vehicle body assembly provided by an exemplary embodiment of the present disclosure.

[0030] Figure 6 is a partial enlarged view of the rear wheel arch position in a vehicle body assembly provided by an exemplary embodiment of the present disclosure.

[0031] Figure 7 is a bottom view of a vehicle body assembly provided in an exemplary embodiment of the present disclosure, which illustrates a subframe mounting bracket, a subframe mounting reinforcement liner, and a shock absorber mounting bracket;

[0032] Figure 8 is a schematic diagram of a vehicle provided in an exemplary embodiment of the present disclosure.

[0033] Explanation of reference numerals in the attached drawings: 1-Rear floor; 21-Rear floor crossbeam; 22-Rear roof crossbeam; 23-Joint; 24-Reinforcing member; 241-First reinforcing member; 242-Second reinforcing member; 2420-Overlapping edge; 251-First cavity; 252-Second cavity; 253-Protective sleeve; 31-Subframe mounting seat; 32-Subframe mounting reinforcing liner; 33-Shock absorber mounting seat; 4-Rear longitudinal beam; 5-Rear wheel arch; 50-Boss; 501-Vertical surface; 502-Circumferential surface; 51-Rib; 6-Rear door frame; 60-Side frame; 61-Rear panel; 62-Frame body; 621-Main body; 622-Lower connecting part; 63-Transfer part; 7-Inner side panel; 8-Reinforcing beam; 9-Body assembly; 10-Vehicle. Detailed Implementation

[0034] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0035] In this disclosure, unless otherwise stated, directional terms such as "up," "down," "front," "right," "left," and "right" generally refer to the normal driving direction of the vehicle. In the figures, the X direction refers to the front-rear direction of the vehicle assembly, the Y direction refers to the width direction of the vehicle assembly, and the Z direction refers to the height direction of the vehicle assembly. "Inner" and "outer" refer to the inner and outer sides relative to the outer contour of the vehicle. Furthermore, when the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications.

[0036] In this disclosure, as shown in Figures 1 to 7, a vehicle body assembly 9 is provided. The vehicle body assembly 9 includes a rear tailgate frame 6, a rear floor 1, a rear floor crossbeam 21, a roof rear crossbeam 22, two opposing side panel inner panels 7, two opposing rear wheel arches 5, two opposing connectors 23, and two opposing reinforcing members 24. The rear tailgate frame 6 includes two opposing side frames 60. The rear floor crossbeam 21 is located above the rear floor 1 and connected between the two connectors 23. The roof rear crossbeam 22 is connected between the two side frames 60. The reinforcing members 24 are connected between the corresponding side frame 60 and the corresponding connector 23. Each reinforcing member 24 includes a first reinforcing member 241 and a second reinforcing member 242 connected together. The first reinforcing member 241 is located on the corresponding rear wheel arch 5 and connected to the corresponding connector 23. The second reinforcing member 242 is located on the corresponding side panel inner panel 7 and connected to the corresponding side frame 60. A first cavity 251 is provided between the rear floor 1, the rear wheel cover 5, and the connector 23 corresponding to the rear wheel cover 5.

[0037] It should be noted that the two side inner panels 7 can be the left and right inner panels that are arranged opposite each other along the width of the vehicle, and the two rear wheel covers 5 can be the left and right rear wheel covers that are arranged opposite each other along the width of the vehicle. The two reinforcing members 24 can be a left reinforcing member and a right reinforcing member arranged opposite each other along the width direction of the vehicle. For example, they can be a left C-pillar reinforcing plate and a right C-pillar reinforcing plate. The left reinforcing member includes a connected left first reinforcing member and a left second reinforcing member. For example, they can be a left lower C-pillar reinforcing plate and a left upper C-pillar reinforcing plate. The right reinforcing member includes a connected right first reinforcing member and a right second reinforcing member. For example, they can be a right lower C-pillar reinforcing plate and a right upper C-pillar reinforcing plate. The left first reinforcing member is located on the left rear wheel arch, and the right first reinforcing member is located on the right rear wheel arch. The left second reinforcing member is located on the left inner panel, and the right second reinforcing member is located on the right inner panel. The two joints 23 can be a left joint and a right joint arranged opposite each other along the width direction of the vehicle. The left joint is connected between the left end of the rear floor crossbeam 21 and the left first reinforcing member, and the right joint is connected between the right end of the rear floor crossbeam 21 and the right first reinforcing member. The two side frames 60 can be a left frame and a right frame arranged opposite each other along the width direction of the vehicle. The left second reinforcement is connected to the left frame, and the right second reinforcement is connected to the right frame to form a closed first ring structure, thereby forming a closed C-pillar ring.

[0038] In this disclosure, a first cavity 251 is provided on the left side of the vehicle assembly 9 between the rear floor 1, the left rear wheel cover, and the left connector corresponding to the left rear wheel cover. On the right side of the vehicle assembly 9, a first cavity 251 is also provided between the rear floor 1, the right rear wheel cover, and the right connector corresponding to the right rear wheel cover.

[0039] In the vehicle body assembly 9 disclosed herein, the roof rear crossbeam 22, left side frame, left second reinforcing member, left first reinforcing member, left connector, rear floor crossbeam 21, right connector, right first reinforcing member, right second reinforcing member, and right side frame together form a closed first ring structure. This ring structure design enhances the body rigidity and structural strength at the rear wheel arch location. In the event of a rollover or side collision, the ring structure better disperses and absorbs collision energy, reducing direct impact on the passenger compartment and better protecting the safety of passengers. Furthermore, the second reinforcing member 242 is connected to the side frame 60 of the rear tailgate frame 6, supporting the rear tailgate frame 6 and improving the stability of the tailgate at the rear tailgate frame 6. Additionally, a first cavity 251 is provided between the rear floor 1, the rear wheel arch 5, and the connector 23 corresponding to the rear wheel arch 5. This allows external loads to be transferred from the first reinforcing member 241 through the connector 23 to the rear floor crossbeam 21, preventing direct load transfer to the rear floor 1 and avoiding large-area deformation of the rear floor 1. In this disclosure, the side frame 60 includes a connected frame body 62 and a transition portion 63. The rear crossbeam 22 of the top cover is connected between the transition portions 63 of the two side frames 60, and the upper end of the second reinforcing member 242 is connected to the corresponding transition portion 63. With this design, the second reinforcing member 242 can support the rear door frame 6 through the transition portion 63 to provide greater support and stability. Specifically, as shown in Figure 2, a vehicle body assembly 9 is provided. The vehicle body assembly 9 includes a tailgate frame 6, and a tailgate can be installed at the tailgate frame 6. The tailgate frame 6 includes a roof rear crossbeam 22, a rear panel 61, and two oppositely arranged side frames 60. Each side frame 60 includes a connected frame body 62 and a connecting part 63. The roof rear crossbeam 22 is connected between the two connecting parts 63, and both ends are connected to the corresponding frame body 62 through the connecting parts 63 respectively. The rear panel 61 is connected between the two frame bodies 62. Here, the two side frames 60 can be a left side frame and a right side frame arranged opposite each other along the vehicle width direction. The two connecting parts 63 can be a left connecting part and a right connecting part arranged opposite each other along the vehicle width direction. The two frame bodies 62 can be a left frame body and a right frame body arranged opposite each other along the vehicle width direction. The left side frame includes a connected left frame body and a left connecting part, and the right side frame includes a connected right frame body and a right connecting part. A left second reinforcing member is connected to the left connecting part, and a right second reinforcing member is connected to the right connecting part.

[0040] In addition, the rear crossbeam 22 of the top cover, the rear panel 61, the two frame bodies 62, and the two transition parts 63 together form a closed second ring structure, forming the tailgate ring. Through the design of a complete tailgate ring, the rigidity and structural strength at the tailgate frame position can be effectively improved, thereby ensuring the stability and reliability of the tailgate installation and avoiding abnormal noise.

[0041] In this disclosure, the first annular structure and / or the second annular structure are each designed as a cavity structure to form a force-transmitting cavity and a complete annular shape, further enhancing the overall rigidity. This disclosure includes embodiments where only the first annular structure is designed as a force-transmitting cavity, embodiments where only the second annular structure is designed as a force-transmitting cavity, and embodiments where both the first and second annular structures are designed as force-transmitting cavities.

[0042] As shown in Figures 1 to 3, each reinforcing member 24 includes a first reinforcing member 241 and a second reinforcing member 242 connected together. The first reinforcing member 241 is located on the inner side of the corresponding rear wheel arch 5 and is positioned near the center. The second reinforcing member 242 is located on the corresponding side panel 7. The two first reinforcing members 241 are connected to the corresponding connectors 23, and the two second reinforcing members 242 are connected to the transition part 63 of the corresponding side frame 60. The first reinforcing member 241, the second reinforcing member 242, the rear floor crossbeam 21, and the two connectors 23 are all U-shaped structures. The first reinforcing member 241 and the corresponding rear wheel arch 5 form a cavity. The second reinforcing member 242 is fastened to the corresponding side panel 7 to form a cavity. The rear floor crossbeam 21 is fastened to the rear floor 1 to form a cavity. The two connectors 23 are located on the inner side of the corresponding rear wheel arch 5 and are used to connect the rear floor crossbeam 21 and the first reinforcing member 241 to form a complete and continuous annular cavity structure.

[0043] As shown in Figure 4, in this disclosure, a first cavity 251 is formed between the rear floor 1, the rear wheel arch 5, and the connector 23 corresponding to the rear wheel arch 5. In this embodiment, the connector 23 may have a first section connected to the rear wheel arch 5, a second section connected to the rear floor 1, and a third section located between the first and second sections. The three sections are arranged at an angle to each other. The overlap position of the connector 23 with the corresponding rear wheel arch 5 is raised to form the first cavity 251, forming a stable support structure and increasing the torsional rigidity of the rear of the vehicle. The first reinforcing member 241 is connected to the crossbeam 21 on the rear floor through the connector 23 to form the first cavity 251, instead of the first reinforcing member 241 directly contacting the rear floor 1 panel. This transfers the load from the first reinforcing member 241 to the crossbeam 21 on the rear floor through the connector 23, preventing the load from being directly transferred to the rear floor 1 and avoiding large-area deformation of the rear floor 1.

[0044] In this disclosure, the rear floor 1, the rear wheel arch 5, and the connector 23 corresponding to the rear wheel arch 5 constitute at least a portion of the cavity wall of the first cavity 251. This disclosure includes embodiments where the entire cavity wall of the first cavity 251 is formed by the rear floor 1, the rear wheel arch 5, and the connector 23 corresponding to the rear wheel arch 5, and also embodiments where a portion of the cavity wall of the first cavity 251 is formed by the rear floor 1, the rear wheel arch 5, and the connector 23 corresponding to the rear wheel arch 5. In the latter embodiment, the rear wheel arch 5 has a boss 50 on the side facing the corresponding connector 23, and the rear floor 1, the rear wheel arch 5, and the connector 23 can be enclosed with the boss 50 to form the first cavity 251. The first cavity 251 can be of any shape, and all are within the protection scope of this disclosure. In other embodiments, the vehicle assembly 9 includes a connecting plate disposed above the rear floor 1, the connecting plate being used to connect the rear floor 1 and the corresponding rear wheel arch 5. The first cavity 251 can be formed by the connector 23, the connecting plate and the rear wheel cover 5, or the connecting plate can include a connected base plate and an extension plate. The base plate is located above the rear floor 1 and connected to the rear floor 1, and the extension plate extends upward from one end of the base plate and is connected to the rear wheel cover 5. The first cavity 251 is formed by the connector 23, the base plate and the extension plate.

[0045] In this disclosure, the first cavity 251 can be used to accommodate high-voltage wiring harnesses or low-voltage wiring harnesses. The first cavity 251 can provide space for the wiring harness layout of the whole vehicle, avoiding the wiring harnesses from taking up space in other places.

[0046] Furthermore, the first cavity 251 is provided with a protective sleeve 253 for covering the high-voltage or low-voltage wire harness, which can better protect the wire harness inside the first cavity 251 and prevent wear.

[0047] As shown in Figure 4, a second cavity 252 is provided between the first reinforcing member 241 and the corresponding rear wheel arch 5. The second cavity 252 also increases the structural rigidity of the vehicle body assembly 9 and reduces the deformation of the vehicle body assembly 9 during a collision. In this disclosure, the first reinforcing member 241 and the corresponding rear wheel arch 5 are constructed as at least part of the cavity wall of the second cavity 252. This disclosure includes embodiments in which the entire cavity wall of the second cavity 252 is formed by the first reinforcing member 241 and the rear wheel arch 5, and also includes embodiments in which part of the cavity wall of the second cavity 252 is formed by the first reinforcing member 241 and the rear wheel arch 5. In the latter embodiment, the rear wheel arch 5 has a boss 50 on the side facing the corresponding joint 23. The first reinforcing member 241 and the rear wheel arch 5 can be enclosed with the boss 50 to form the first cavity 251, and the second cavity 252 can be formed in any shape, all of which are within the protection scope of this disclosure.

[0048] The second cavity 252 is located at the arc-shaped position where the vertical surface 501 and the circumferential surface 502 of the rear wheel cover 5 meet. This design optimizes the overlap of the first reinforcing member 241 at the arc position and reduces the difficulty of connecting the first reinforcing member 241 to the rear wheel cover 5 or the connector 23.

[0049] The rear wheel arch 5 has a boss 50 on the side facing the corresponding connector 23. The boss 50 can be located on the vertical surface 501 of the rear wheel arch 5. The first reinforcing member 241 and the corresponding connector 23 are connected at the position of the corresponding boss 50. Specifically, the left rear wheel arch has a left boss, and the right rear wheel arch has a right boss. The left first reinforcing member and the left connector are connected at the position of the left boss, and the right first reinforcing member and the right connector are connected at the position of the right boss. The boss structure on the rear wheel arch reduces the difficulty of connecting the first reinforcing member and the connector.

[0050] In this disclosure, the rear crossbeam 22 of the roof, the rear panel 61, the frame body 62, and the transition part 63 all form a force transmission cavity and a complete ring structure, thereby improving the rigidity of the vehicle body at the rear door frame position.

[0051] Additionally, as shown in Figure 2, each frame body 62 includes a main body 621 and a lower connecting part 622. The lower connecting part 622 is inclined along the height direction of the vehicle assembly 9. The first end of the main body 621 is connected to the adapter 63, and the second end extends obliquely downward along the front-rear direction of the vehicle assembly 9 in a direction away from the rear crossbeam 22 of the roof and connects to the lower connecting part 622. The upper part of the side frame 60 is connected to the rear crossbeam 21 of the roof and extends towards the rear of the vehicle. It is connected to the rear panel 61 through the lower connecting part 622. The overall structure matches the fastback styling design of the vehicle, making the overall appearance of the vehicle more sporty and smooth. Thus, the two reinforcing members 24 provide support for the tailgate with a large fastback trend, solving the stability problem of the tailgate with a large fastback trend.

[0052] In this disclosure, the first ring structure and the second ring structure are designed together, as shown in Figures 2 and 3. The upper end of the second reinforcing member 242 is connected to the transition part 63 of the second ring structure. In this way, the two reinforcing members 24 can form a stable support structure for the second ring structure, strengthening the strength of the rear door frame 6. At the same time, the second ring structure and the first ring structure overlap at the position of the rear crossbeam 22 of the roof, incorporating the rear crossbeam 22 of the roof into the ring structure of the C-pillar ring and the rear door ring, thereby enhancing the strength of the rear door frame 6 and the strength at the position of the rear wheel arch 5.

[0053] As shown in Figure 5, at the overlap position between the second reinforcing member 242 and the corresponding transition part 63, the second reinforcing member 242 has an overlap edge 2420 extending along the width direction of the vehicle assembly 9. The addition of the overlap edge 2420 at the upper end of the second reinforcing member 242 increases the volume of the C-pillar ring at the overlap position, increases the overlap area of ​​the cavity at the overlap position between the C-pillar ring and the tailgate ring, ensures the efficiency of force transmission from the tailgate ring to the C-pillar ring after being subjected to load, optimizes the force transmission path, and ensures smoother force transmission.

[0054] Furthermore, in this disclosure, the projections of the rear crossbeam 22 of the roof and the rear floor crossbeam 21 in the height direction of the vehicle assembly 9 at least partially overlap. The projections of the front part of the tailgate ring, namely the rear crossbeam 22 of the roof and the rear floor crossbeam 21 of the C-pillar ring, in the height direction at least partially overlap. The rear crossbeam 22 of the roof and the rear floor crossbeam 21 can overlap in the front-rear direction of the vehicle assembly 9, thereby achieving overlapping reinforcement of the tailgate ring and the C-pillar ring. The two force transmission ring structures are coupled to each other, increasing the torsional stiffness of the vehicle body and improving the vehicle's handling performance.

[0055] In this disclosure, the C-pillar ring and the rear suspension system are designed in a coordinated manner to enhance ride comfort. For example, the C-pillar ring can be designed in conjunction with the subframe mounting and shock absorber mounting, such as with the subframe mounting bracket 31, the subframe mounting reinforcement plate 32, and the shock absorber mounting bracket 33. Furthermore, in the embodiments provided in this disclosure, the projection of the C-pillar ring in the height direction of the vehicle assembly 9 can be the surface where the rear floor crossbeam 21 contacts the rear floor 1. The statement that the projections in the height direction of the vehicle assembly 9 at least partially overlap includes embodiments where the projections are arranged at an angle to each other on the surface of the rear floor 1, as well as embodiments where they overlap in the longitudinal direction. Additionally, the phrase "at least partially overlap" throughout the text includes embodiments where the projections completely overlap, as well as embodiments where they substantially overlap, all of which fall within the scope of this disclosure.

[0056] In the body assembly 9 disclosed herein, the forces on the subframe mount 31, the subframe mount reinforcement liner 32, and the shock absorber mount 33 can be transmitted to the C-pillar ring. The C-pillar ring disperses the forces on the subframe mount 31, the subframe mount reinforcement liner 32, and the shock absorber mount 33, thus contributing to the ride comfort of the rear suspension of the chassis. Furthermore, the C-pillar ring can reinforce the subframe mount 31, the subframe mount reinforcement liner 32, and the shock absorber mount 33, thereby improving the structural strength at these locations, optimizing the force transmission path from ground excitation, and enhancing the durability of these locations.

[0057] In an exemplary embodiment of this disclosure, as shown in FIG2, a rear longitudinal beam 4 extending in the front-rear direction of the vehicle is provided below the rear floor 1, and a subframe mounting seat 31 is provided on the rear longitudinal beam 4. The subframe mounting seat 31 is used to connect with the subframe. The projection of at least one of the crossbeam 21 and the joint 23 on the rear floor at least partially coincides with the projection of the corresponding subframe mounting seat 31 in the height direction of the vehicle assembly 9. Here, a left subframe mounting seat is provided corresponding to the left end and left side joint of the rear floor crossbeam 21, and a right subframe mounting seat is provided corresponding to the right end and right side joint of the rear floor crossbeam 21. This disclosure includes embodiments where the projections of the subframe mounting seat 31 and the joint 23 in the height direction of the body assembly 9 at least partially overlap; embodiments where the projections of the subframe mounting seat 31 and the rear floor crossbeam 21 in the height direction of the body assembly 9 at least partially overlap; and embodiments where the projections of both the rear floor crossbeam 21 and the joint 23 in the height direction of the body assembly 9 at least partially overlap with the projection of the subframe mounting seat 31 in the height direction of the body assembly 9. The subframe mounting seat 31 serves as a subframe mounting point, and the position of the subframe mounting seat 31 can correspond exactly to the position of the joint 23 in the front-rear direction of the body assembly 9. The subframe mounting point is reinforced by a complete C-pillar ring structure.

[0058] For example, the subframe mounting base 31 can be a bowl-shaped structure with an opening fastened to the bottom surface of the rear longitudinal beam 4, the edge of the bowl-shaped structure extending to the side and bottom surface of the rear longitudinal beam 4. The subframe mounting point is formed by combining the bowl-shaped sheet metal part with the rear longitudinal beam 4, and the edge of the bowl-shaped structure overlaps the Y-plane and Z-plane of the rear longitudinal beam 4, which can further improve the connection strength between the subframe mounting base 31 and the rear longitudinal beam 4.

[0059] In this disclosure, a subframe mounting reinforcement liner 32 is provided below the rear floor 1. The subframe mounting reinforcement liner 32 and the subframe mounting seat 31 are at least partially opposite each other in the width direction of the vehicle assembly 9. At least one of the rear longitudinal beam 4 and the subframe mounting seat 31 is connected to the corresponding subframe mounting liner 32. The subframe mounting reinforcement liner 32 can extend along the width direction of the vehicle, with one end connected to the side of the rear longitudinal beam 4 and connected to the subframe mounting seat 31. The subframe mounting reinforcement liner 32 can further strengthen the structural strength at the subframe mounting point. In the height direction of the vehicle assembly 9, the projection of at least one of the rear floor crossbeam 21 and the joint 23 at least partially coincides with the projection of the subframe mounting reinforcement liner 32. In this embodiment, a left subframe mounting reinforcement liner is provided corresponding to the left subframe mounting seat, and a right subframe mounting reinforcement liner is provided corresponding to the right subframe mounting seat, respectively, to strengthen the connection strength at the corresponding side subframe mounting seat 31.

[0060] The subframe mounting reinforcement plate 32 can be a sheet metal part welded to the inner side (Y-plane) of the rear longitudinal beam 4 and the lower surface of the rear floor 1. This disclosure includes embodiments where the subframe mounting reinforcement plate 32 and the rear floor crossbeam 21 extend in the same direction and overlap in the longitudinal direction of the vehicle. It also includes embodiments where the projections of the rear floor crossbeam 21 and the joint 23 in the height direction overlap, which can further enhance the strength at the subframe mounting point. Of course, it also includes embodiments where the projections of the subframe mounting reinforcement plate 32 and the joint 23 in the height direction at least partially overlap. In addition, the subframe mounting reinforcement plate 32 overlaps with the subframe mounting seat 31 in the longitudinal direction and with the rear floor crossbeam 21 in the longitudinal direction, which can improve the dynamic stiffness of the front mounting point of the subframe through the C-pillar ring.

[0061] For example, the first end of the subframe mounting reinforcement liner 32 extends to the side of the rear longitudinal beam 4, and the subframe mounting reinforcement liner 32 is a flat structure with its height gradually decreasing in the direction away from the first end. The subframe mounting reinforcement liner 32 has a cavity-flattened design, which can optimize the overall layout space under the rear floor.

[0062] In this disclosure, as shown in FIG3, a shock absorber mounting seat 33 is provided on the rear wheel arch 5. As shown in FIG7, at least two of the shock absorber mounting seat 33, subframe mounting seat 31, and subframe mounting reinforcement plate 32 overlap in their positions in the vehicle's longitudinal direction. The shock absorber mounting seat 33 can also utilize the C-pillar ring to enhance the dynamic stiffness of the mounting point. The shock absorber mounting seat 33 can be a rear shock absorber sliding pillar mounting point. In this embodiment, as shown in FIG3, in the width direction and / or height direction of the vehicle assembly 9, the projection of at least one of the first reinforcement member 241 and the second reinforcement member 242 at least partially coincides with the projection of the corresponding shock absorber mounting seat 33. Here, shock absorber mounting seats 33 are respectively provided on the left and right rear wheel arches. The left shock absorber mounting seat corresponding to the left first reinforcement member and the left second reinforcement member is provided on the left rear wheel arch, and the right shock absorber mounting seat corresponding to the right first reinforcement member and the right second reinforcement member is provided on the right rear wheel arch. Taking the second reinforcing member 242 as an example, the projections of the second reinforcing member 242 and the shock absorber mounting seat 33 in the width direction of the vehicle assembly 9 at least partially overlap, ensuring that the shock absorber mounting seat 33 and the second reinforcing member 242 are positioned in the front-rear direction. The projections of the second reinforcing member 242 and the shock absorber mounting seat 33 in the height direction of the vehicle assembly 9 at least partially overlap. The outer surface of the rear wheel arch 5 adopts a concave design at the position corresponding to the shock absorber mounting seat 33, ensuring that the two overlap in the height direction. The shock absorber mounting point is reinforced through the overall structure of the C-pillar ring.

[0063] Furthermore, in this disclosure, the body assembly 9 also includes two reinforcing beams 8, which are located on the corresponding side inner panels 7 and behind the corresponding reinforcing members 24. A left reinforcing beam is provided on the left side inner panel, and a right reinforcing beam is provided on the right side inner panel. The first end of each reinforcing beam 8 is connected to the corresponding side frame 60 and can be connected to the frame body 62 of the corresponding side frame 60. The second end of each reinforcing beam 8 is connected to the rear wheel arch 5. The first end of the left reinforcing beam can be connected to the left side frame body, and the second end of the left reinforcing beam can be connected to the left rear wheel arch. The first end of the right reinforcing beam can be connected to the right side frame body, and the second end of the right reinforcing beam can be connected to the right rear wheel arch. This design provides crucial support for the tailgate ring, ensuring the overall rigidity of the body.

[0064] In this disclosure, as shown in FIG6, at least one raised rib 51 extending in the height direction is provided on the rear wheel arch 5 at the rear part of the C-pillar ring. The raised rib 51 can extend in the vertical direction, which can increase the rigidity of the vertical surface 501 of the rear wheel arch and prevent deformation.

[0065] For example, the rear wheel arch 5 is provided with three protruding ribs 51. In order to cooperate with the reinforcing beam 8, one of the protruding ribs 51 is connected to the reinforcing beam 8, and the protruding rib 51 connected to the reinforcing beam 8 is located between the other two protruding ribs 51. After the reinforcing beam 8 is connected to the middle protruding rib 51, the load transmitted from the rear door frame 6 is transferred to the rear floor 1 and the rear longitudinal beam 4 through the protruding rib 51. For example, the cross-section of the reinforcing beam 8 can be a Z-shaped structure, and the opening of the Z-shaped structure is fastened to the inner side panel 7 and forms a cavity. In other embodiments, the reinforcing beam 8 can be a plate-shaped sheet metal part welded and fixed to the inner side panel 7. This disclosure does not limit this.

[0066] Referring to FIG8, according to a second aspect of the present disclosure, a vehicle 10 is provided, the vehicle 10 including the body assembly 9 described above, the vehicle 10 having all the beneficial effects of the body assembly 9, which will not be elaborated further here.

[0067] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0068] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0069] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A vehicle body assembly (9), characterized in that, The back door frame (6), the rear floor (1), the rear floor upper cross beam (21), the roof rear cross beam (22), two oppositely arranged side wall inner plates (7), two oppositely arranged rear wheel covers (5), two oppositely arranged joints (23), and two oppositely arranged reinforcing members (24), The rear floor (1), the rear wheel cover (5), and the joint (23) corresponding to the rear wheel cover (5) are provided with a first cavity (251). The rear floor (1), the rear wheel cover (5), and the joint (23) corresponding to the rear wheel cover (5) are configured as at least part of the cavity wall of the first cavity (251).

2. The vehicle body assembly (9) according to claim 1, characterized in that The first cavity (251) is used to accommodate high-voltage wiring harness or low-voltage wiring harness.

3. The vehicle body assembly (9) according to claim 1 or 2, characterized in that The first cavity (251) is provided with a protective sleeve (253) for covering the high-voltage wiring harness or the low-voltage wiring harness.

4. The vehicle body assembly (9) according to claim 3, characterized in that The first reinforcing member (241) and the corresponding rear wheel cover (5) are provided with a second cavity (252), and the first reinforcing member (241) and the corresponding rear wheel cover (5) are configured as at least part of the cavity wall of the second cavity (252).

5. The vehicle body assembly (9) according to any one of claims 1-4, characterized in that, The second cavity (252) is arranged at an arc-shaped position where the vertical surface (501) and the circumferential surface (502) of the rear wheel cover (5) are connected.

6. The vehicle body assembly (9) according to claim 5, characterized in that The rear wheel cover (5) is provided with a boss (50) on the side facing the corresponding joint (23), and the first reinforcing member (241) and the corresponding joint (23) are connected at the position of the corresponding boss (50).

7. The vehicle body assembly (9) according to any one of claims 1-6, characterized in that, The side frame (60) includes a frame body (62) and an adapter (63) connected thereto, the roof rear cross beam (22) is connected between the adapter (63) of the two side frames (60), and the upper end of the second reinforcing member (242) is connected to the corresponding adapter (63).

8. The vehicle body assembly (9) according to any one of claims 1-7, characterized in that, At the overlapping position of the second reinforcing member (242) and the corresponding adapter (63), the second reinforcing member (242) has an overlapping edge (2420) extending in the width direction of the vehicle body assembly (9).

9. The vehicle body assembly (9) according to claim 8, characterized in that ​ 10. The vehicle body assembly (9) according to any one of claims 1-9, characterized in that, The vehicle body assembly (9) comprises two reinforcing beams (8) arranged on the corresponding side inner panels (7) and located behind the corresponding reinforcing members (24), the first ends of the reinforcing beams (8) are connected to the corresponding side frames (60), and the second ends of the reinforcing beams (8) are connected to the corresponding rear wheel covers (5); three protrusions (51) are arranged on the rear wheel cover (5), one of the three protrusions (51) is connected to the reinforcing beam (8), and the protrusion (51) connected to the reinforcing beam (8) is located between the other two protrusions (51).

11. The vehicle body assembly (9) according to any one of claims 1-10, characterized in that The top cover rear cross beam (22) and the rear floor upper cross beam (21) at least partially overlap in the height direction of the vehicle body assembly (9); and / or, The rear floor (1) is provided with rear longitudinal beams (4), the rear longitudinal beams (4) are provided with subframe mounting seats (31), and the projections of at least one of the rear floor upper cross beam (21) and the joint (23) and the projection of the corresponding subframe mounting seat (31) at least partially overlap in the height direction of the vehicle body assembly (9).

12. The vehicle body assembly (9) according to claim 11, characterized in that The rear floor (1) is provided with subframe mounting reinforcing lining plates (32), the subframe mounting reinforcing lining plates (32) are at least partially opposite to the subframe mounting seats (31) in the width direction of the vehicle body assembly, and at least one of the rear longitudinal beams (4) and the subframe mounting seats (31) is connected to the corresponding subframe mounting reinforcing lining plate (32), and the projection of at least one of the rear floor upper cross beam (21) and the joint (23) and the projection of the corresponding subframe mounting reinforcing lining plate (32) at least partially overlap in the height direction of the vehicle body assembly (9).

13. A vehicle (10) characterized by, The vehicle body assembly (9) comprises the vehicle body assembly (9) according to any one of claims 1-12. The vehicle body assembly (9) comprises the vehicle body assembly (9) according to any one of claims 1-12.

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