Vehicle body rear structure, vehicle body structure and automobile

Abstract

The present invention relates to a rear vehicle body structure, a vehicle body structure, and an automobile. The rear vehicle body structure includes a lower vehicle body welding assembly, a right side panel inner panel assembly, a top cover middle cross beam assembly, and a left side panel inner panel assembly. The lower vehicle body welding assembly includes a lower vehicle body welding assembly body and a rear seat mounting cross beam assembly. The rear seat mounting cross beam assembly and the lower vehicle body welding assembly body form a first cavity structure. The right side panel inner panel assembly has a second cavity structure, the top cover middle cross beam assembly has a third cavity structure, and the left side panel inner panel assembly has a fourth cavity structure. The first cavity structure and the third cavity structure are connected through the second cavity structure and the fourth cavity structure to form an annular cavity structure. The rear vehicle body structure, the vehicle body structure, and the automobile provided by the embodiments of the present invention facilitate the dispersion of impact energy in a side collision, optimize the force transmission path, and improve the side collision performance of the automobile.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to a vehicle body rear structure, a vehicle body structure and an automobile. Background Art

[0002] A car's crashworthiness is a crucial indicator of its performance and a reliable guarantee of comfort and safety for its users. Side impact performance, a key component of crashworthiness, is a crucial indicator. With the tightening requirements of the latest version of the China New Car Assessment Program (C-NCAP), the requirements for side impact performance have also increased accordingly.

[0003] Currently, in conventional automobile structural designs, the rear side panel assembly has a cavity structure, but the cavity structure in the rear side panel assembly and other structures of the vehicle body do not form an effective force transmission channel, and thus cannot meet the latest anti-collision requirements of the rear side panel C-pillar area, that is, cannot meet the required improved side collision performance. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a vehicle body rear structure to solve the technical problem that the vehicle body rear structure in the prior art cannot meet the requirements for improved side collision performance; the second purpose is to provide a vehicle body structure; and the third purpose is to provide a car.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A vehicle body rear structure, comprising a lower body welding assembly, a right side panel inner panel assembly, a roof center crossbeam assembly, and a left side panel inner panel assembly, wherein the lower body welding assembly includes a lower body welding assembly body and a rear seat mounting crossbeam assembly, wherein the rear seat mounting crossbeam assembly and the lower body welding assembly body form a first cavity structure;

[0007] The right side inner panel assembly has a second cavity structure, the top cover middle beam assembly has a third cavity structure, and the left side inner panel assembly has a fourth cavity structure. The first cavity structure and the third cavity structure are connected through the second cavity structure and the fourth cavity structure to form an annular cavity structure.

[0008] According to the above technical means, the first cavity structure and the third cavity structure are connected through the second cavity structure and the fourth cavity structure to form an annular cavity structure. When the right side inner panel assembly is subjected to a side collision, the impact energy of the collision will be transmitted through the second cavity structure of the right side inner panel assembly to the third cavity structure of the top cover middle crossbeam assembly and the first cavity structure of the lower body welding assembly, and then to the fourth cavity structure of the left side inner panel assembly, which facilitates the dispersion of the impact energy of the side collision, optimizes the force transmission path, and improves the side collision performance of the vehicle to meet the side collision performance requirements of the latest version of C-NCAP, solving the problem in the existing technology that the rear vehicle body structure cannot meet the required improved side collision performance; in addition, due to the high strength and stability of the rear seat mounting crossbeam assembly, the second cavity structure of the right side inner panel assembly and the fourth cavity structure of the left side inner panel assembly are connected to the first cavity structure formed by the rear seat mounting crossbeam assembly and the lower body welding assembly, which can further improve the side collision performance of the vehicle.

[0009] Furthermore, the right side panel inner panel assembly includes a first side panel rocker reinforcement rear connecting plate, a first side panel rear lower inner panel reinforcement connected to the first side panel rocker reinforcement rear connecting plate, a first rear wheel bulge outer panel front connecting plate connected to the first side panel rear lower inner panel reinforcement, a first side panel rear upper inner panel connecting member connected to the first rear wheel bulge outer panel front connecting plate, and a first rear wheel bulge inner panel inner reinforcement connected to the first side panel rear upper inner panel connecting member;

[0010] The first side panel rocker reinforcement rear connecting plate, the first side panel rear lower inner panel reinforcement, the first rear wheel bulge outer panel front connecting plate, the first rear wheel bulge inner panel inner reinforcement and the first side panel rear upper inner panel connecting member form the second cavity structure.

[0011] According to the above-mentioned technical means, by setting the front connecting plate of the first rear wheel bulge outer panel, the first side panel rear lower inner panel reinforcement and the first side panel rear upper inner panel connecting member can be connected, and together with the first rear wheel bulge inner panel inner reinforcement, a cavity is formed, thereby expanding the cavity structure of the right side panel inner panel assembly and improving the collision resistance of the right side panel inner panel assembly.

[0012] Furthermore, the left side panel inner panel assembly includes a second side panel rocker reinforcement rear connecting plate, a second side panel rear lower inner panel reinforcement connected to the second side panel rocker reinforcement rear connecting plate, a second rear wheel hub outer panel front connecting plate connected to the second side panel rear lower inner panel reinforcement, a second side panel rear upper inner panel connecting member connected to the second rear wheel hub outer panel front connecting plate, and a second rear wheel hub inner panel inner reinforcement connected to the second side panel rear upper inner panel connecting member;

[0013] The second side panel rocker reinforcement rear connecting plate, the second side panel rear lower inner panel reinforcement, the second rear wheel bulge outer panel front connecting plate, the second rear wheel bulge inner panel inner reinforcement and the second side panel rear upper inner panel connecting member form the fourth cavity structure.

[0014] According to the above technical means, by setting the front connecting plate of the second rear wheel bulge outer panel, the second side panel rear lower inner panel reinforcement and the second side panel rear upper inner panel connecting member can be connected, and together with the second rear wheel bulge inner panel inner reinforcement, a cavity is formed, thereby expanding the cavity structure of the left side panel inner panel assembly and improving the collision resistance of the left side panel inner panel assembly.

[0015] Furthermore, the lower body welding assembly further includes a first sill side beam, a second sill side beam, a first rear floor front connecting member, and a second rear floor front connecting member, wherein the first sill side beam and the second sill side beam are respectively connected to two ends of the rear seat mounting crossbeam assembly, the first rear floor front connecting member is connected to the first sill side beam, and the second rear floor front connecting member is connected to the second sill side beam;

[0016] The right side panel inner panel assembly further includes a first rear wheel hub outer panel connected to the first side panel sill reinforcement rear connecting plate; the first rear floor front connecting piece, the first rear wheel hub outer panel, and the first side panel sill reinforcement rear connecting plate form a right lower connecting cavity; the first sill side beam has a first sill cavity; the second cavity structure is connected to the first cavity structure through the right lower connecting cavity and the first sill cavity;

[0017] The left side inner panel assembly also includes a second rear wheel hub package outer panel connected to the rear connecting plate of the second side side sill reinforcement. The second rear floor front connecting piece, the second rear wheel hub package outer panel and the rear connecting plate of the second side side sill reinforcement form a left lower connecting cavity. The second sill side beam has a second sill cavity. The fourth cavity structure is connected to the first cavity structure through the left lower connecting cavity and the second sill cavity.

[0018] According to the above technical means, the first rear floor front connecting member, the first sill side beam, the second rear floor front connecting member and the second sill side beam are reasonably utilized to achieve the connection between the first cavity structure, the second cavity structure and the fourth cavity structure, thereby saving costs.

[0019] Furthermore, the rear connecting plate of the first side panel rocker reinforcement is a thermoformed sheet metal part, the first side panel rear lower inner panel reinforcement is a thermoformed sheet metal part, the rear connecting plate of the second side panel rocker reinforcement is a thermoformed sheet metal part, and the second side panel rear lower inner panel reinforcement is a thermoformed sheet metal part.

[0020] According to the above technical means, the rear connecting plate of the first side panel sill reinforcement, the rear lower inner panel reinforcement of the first side panel, the rear connecting plate of the second side panel sill reinforcement, and the rear lower inner panel reinforcement of the second side panel can have extremely high strength and ductility, thereby improving the collision resistance of the right side panel inner panel assembly and the left side panel inner panel assembly.

[0021] Furthermore, the roof middle cross beam assembly includes a roof middle cross beam inner plate and a roof middle cross beam outer plate connected to the roof middle cross beam inner plate, and the roof middle cross beam inner plate and the roof middle cross beam outer plate form the third cavity structure;

[0022] The right side inner panel assembly further includes a first inner connecting plate and a first outer connecting plate connected to the first inner connecting plate, wherein the first outer connecting plate and the first inner connecting plate form a right upper connecting cavity, and the third cavity structure is connected to the second cavity structure through the right upper connecting cavity;

[0023] The left side inner panel assembly also includes a second inner connecting plate and a second outer connecting plate connected to the second inner connecting plate. The second outer connecting plate and the second inner connecting plate form an upper left connecting cavity. The third cavity structure is connected to the fourth cavity structure through the upper left connecting cavity.

[0024] According to the above technical means, the connection between the third cavity structure and the second cavity structure is realized by setting the first outer connecting plate and the first inner connecting plate, and the connection between the third cavity structure and the fourth cavity structure is realized by setting the second outer connecting plate and the second inner connecting plate. The first outer connecting plate, the first inner connecting plate, the second outer connecting plate and the second inner connecting plate are reasonably utilized to realize the connection between the third cavity structure and the second cavity structure and the fourth cavity structure, thereby saving costs.

[0025] Furthermore, the first rear floor front connecting piece is welded to the first rear wheel hub package outer plate, and the second rear floor front connecting piece is welded to the second rear wheel hub package outer plate;

[0026] The inner plate of the top cover middle cross beam is welded to the first inner connecting plate, the outer plate of the top cover middle cross beam is welded to the first outer connecting plate, the inner plate of the top cover middle cross beam is welded to the second inner connecting plate, and the outer plate of the top cover middle cross beam is welded to the second outer connecting plate.

[0027] According to the above technical means, the connection performance of the lower body welding assembly with the right side inner panel assembly and the left side inner panel assembly is guaranteed, and the connection performance of the top cover middle cross beam assembly with the right side inner panel assembly and the left side inner panel assembly is guaranteed.

[0028] Furthermore, the front connecting plate of the first rear wheel bulge outer panel is welded to the first side panel rear lower inner panel reinforcement, and the front connecting plate of the first rear wheel bulge outer panel is welded to the first side panel rear upper inner panel connecting piece;

[0029] The front connecting plate of the second rear wheel bulge outer panel is welded to the second side panel rear lower inner panel reinforcement, and the front connecting plate of the second rear wheel bulge outer panel is welded to the second side panel rear upper inner panel connecting piece.

[0030] According to the above technical means, the connection strength of the front connecting plate of the first rear wheel bulge outer plate is met, and the connection performance of the front connecting plate of the first rear wheel bulge outer plate is better; the connection strength of the front connecting plate of the second rear wheel bulge outer plate is met, and the connection performance of the front connecting plate of the second rear wheel bulge outer plate is better.

[0031] Furthermore, the thickness of the rear connecting plate of the first side panel sill reinforcement is 1.3mm-1.5mm, the thickness of the first side panel rear lower inner panel reinforcement is 1.3mm-1.5mm, the thickness of the rear connecting plate of the second side panel sill reinforcement is 1.3mm-1.5mm, and the thickness of the second side panel rear lower inner panel reinforcement is 1.3mm-1.5mm.

[0032] According to the above technical means, the strength of the first side panel sill reinforcement rear connecting plate, the first side panel rear lower inner panel reinforcement, the second side panel sill reinforcement rear connecting plate, and the second side panel rear lower inner panel reinforcement is improved.

[0033] Further, along the first direction, the position of the first end of the third cavity structure is aligned with the position of the first end of the upper right connecting cavity, the position of the second end of the third cavity structure is aligned with the position of the first end of the upper left connecting cavity, the position of the second end of the upper right connecting cavity is aligned with the position of the second cavity structure near one end of the crossbeam assembly in the top cover, and the position of the second end of the upper left connecting cavity is aligned with the position of the fourth cavity structure near one end of the crossbeam assembly in the top cover, and the first direction is perpendicular to the extension direction of the rear seat mounting crossbeam assembly.

[0034] According to the above technical means, the effect of dispersing the impact energy during a side collision can be ensured.

[0035] A vehicle body structure comprises any one of the above-mentioned rear vehicle body structures.

[0036] An automobile comprises any one of the above-mentioned rear vehicle body structures.

[0037] Beneficial effects of the present invention:

[0038] In an embodiment of the present invention, the first cavity structure and the third cavity structure are connected through the second cavity structure and the fourth cavity structure to form an annular cavity structure. When the right side inner panel assembly is subjected to a side collision, the impact energy of the collision will be transmitted through the second cavity structure of the right side inner panel assembly to the third cavity structure of the top cover middle crossbeam assembly and the first cavity structure of the lower body welding assembly, and then to the fourth cavity structure of the left side inner panel assembly. This facilitates the dispersion of the impact energy of the side collision, optimizes the force transmission path, and improves the side collision performance of the vehicle to meet the side collision performance requirements of the latest version of C-NCAP, solving the problem in the prior art that the rear vehicle body structure cannot meet the required improved side collision performance. In addition, due to the high strength and stability of the rear seat mounting crossbeam assembly, the second cavity structure of the right side inner panel assembly and the fourth cavity structure of the left side inner panel assembly are connected to the first cavity structure formed by the rear seat mounting crossbeam assembly and the lower body welding assembly, which can further improve the side collision performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic structural diagram of a vehicle body rear structure provided by an embodiment of the present invention;

[0040] Figure 2 A schematic structural diagram of a lower body welding assembly in a rear vehicle body structure provided by an embodiment of the present invention;

[0041] Figure 3 A schematic structural diagram of the right side inner panel assembly in the rear vehicle body structure provided by an embodiment of the present invention;

[0042] Figure 4 A schematic structural diagram of a middle cross beam assembly of a roof in a rear vehicle body structure according to an embodiment of the present invention;

[0043] Figure 5 A schematic structural diagram of a left side inner panel assembly in a vehicle body rear structure provided by an embodiment of the present invention;

[0044] Figure 6 for Figure 3 AA-direction cross-sectional view;

[0045] Figure 7 A schematic diagram of the connection between the lower body welding assembly and the right side panel assembly in the rear vehicle body structure provided by an embodiment of the present invention;

[0046] Figure 8 A schematic structural diagram of a force transmission path of a vehicle body rear structure provided by an embodiment of the present invention;

[0047] Figure 9 for Figure 2 BB-direction cross-sectional view;

[0048] Figure 10 for Figure 3 Schematic diagram of CC section;

[0049] Figure 11 for Figure 4 DD-direction cross-sectional view;

[0050] Figure 12 for Figure 5 Schematic diagram of the EE section.

[0051] Among them, 1-lower body welding assembly, 11-rear seat mounting crossbeam assembly, 12-first sill side beam, 13-first rear floor front connector, 14-second rear floor front connector, 15-second sill side beam, 16-lower body welding assembly, 2-right side panel assembly, 21-first rear wheel hub outer panel, 22-first side panel sill reinforcement rear connecting plate, 23-first side panel rear lower inner panel reinforcement, 24-first rear wheel bulge outer panel front connecting plate, 25-first rear wheel bulge inner panel inner reinforcement, 26-first side panel rear upper inner panel connector, 27-first An outer connecting plate, 28-first inner connecting plate, 29-first rear wheel hub package inner plate, 3-top cover middle cross beam assembly, 31-top cover middle cross beam inner plate, 32-top cover middle cross beam outer plate, 4-left side panel inner plate assembly, 41-second rear wheel hub package outer plate, 42-second side panel sill reinforcement rear connecting plate, 43-second side panel rear lower inner plate reinforcement, 44-second rear wheel bulge outer plate front connecting plate, 45-second rear wheel bulge inner plate inner reinforcement, 46-second side panel rear upper inner plate connecting piece, 47-second outer connecting plate, 48-second inner connecting plate, 49-second rear wheel hub package inner plate. DETAILED DESCRIPTION

[0052] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0053] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0054] With the increased requirements of the 2024 C-NCAP, including heavier side impact barriers, increased speeds, and the addition of a far-side impact assessment, the barrier's X-direction (i.e., length) dimension has increased from 1685mm to 1800mm. This places increased demands on the impact protection structure in the rear C-pillar area, and consequently, on side impact performance. With the industry's focus on lightweighting and high performance, particularly with the exploration of new energy vehicles, research on the impact protection structure in the rear C-pillar area is a key area of ​​focus for the automotive industry. Currently, conventional automotive structural designs incorporate a cavity structure within the rear side assembly. However, this cavity structure lacks an effective force transmission channel with other vehicle body structures, and therefore cannot meet the latest impact protection requirements for the rear C-pillar area, specifically the increased side impact performance requirements. To address these issues, embodiments of the present invention provide a rear body structure, a vehicle body structure, and a vehicle.

[0055] First, refer to Figures 1 to 12 An embodiment of the present invention proposes a rear vehicle body structure, including a lower body welding assembly 1, a right side panel inner panel assembly 2, a top cover middle cross beam assembly 3 and a left side panel inner panel assembly 4. The lower body welding assembly 1 includes a lower body welding assembly body 16 and a rear seat mounting cross beam assembly 11. The rear seat mounting cross beam assembly 11 and the lower body welding assembly body 16 form a first cavity structure; the right side panel inner panel assembly 2 has a second cavity structure, the top cover middle cross beam assembly 3 has a third cavity structure, and the left side panel inner panel assembly 4 has a fourth cavity structure. The first cavity structure and the third cavity structure are connected through the second cavity structure and the fourth cavity structure to form an annular cavity structure.

[0056] Specifically, the rear vehicle body structure provided in the embodiments of the present invention is applied to an automobile, which can be of various types, such as a sedan, a commercial vehicle, an off-road vehicle, or a sport utility vehicle. It should be noted that in the description of the embodiments of the present invention, the up-down, front-back, left-right, and inside-outside directions are consistent with the up-down, front-back, left-right, and inside-outside directions of the vehicle.

[0057] The right side inner panel assembly 2 and the left side inner panel assembly 4 are respectively arranged on the right and left sides of the lower body welding assembly 1, and the roof center cross beam assembly 3 is located above the lower body welding assembly 1. The lower body welding assembly 1 has a first cavity structure, which extends along the width direction of the car. The third cavity structure of the roof center cross beam assembly 3 extends along the width direction of the car. Figure 9The rear seat mounting crossbeam assembly 11 and the lower body welded assembly 16 form a first cavity structure. The rear seat mounting crossbeam assembly 11 and the lower body welded assembly 16 can be connected by welding, riveting, screwing, etc. The first cavity structure is connected to the lower portion of the second cavity structure and the lower portion of the fourth cavity structure at both ends along the width of the vehicle. The third cavity structure is connected to the upper portion of the second cavity structure and the upper portion of the fourth cavity structure at both ends along the width of the vehicle.

[0058] Reference Figure 8 When the right side panel assembly 2 is subjected to a side collision, the impact energy of the collision is transmitted through the second cavity structure of the right side panel assembly 2 to the third cavity structure of the top cover center cross beam assembly 3 and the first cavity structure of the lower body welding assembly 1, and then to the fourth cavity structure of the left side panel assembly 4. When the left side panel assembly 4 is subjected to a side collision, the impact energy of the collision is transmitted through the fourth cavity structure of the left side panel assembly 4 to the third cavity structure of the top cover center cross beam assembly 3 and the first cavity structure of the lower body welding assembly 1, and then to the second cavity structure of the right side panel assembly 2. The latest side collision performance requirements increase the side collision energy of the side collision performance test by 97% compared to the previous requirements. The rear vehicle body structure provided by the embodiment of the present invention can still meet the side collision performance requirements under the test with a 97% increase in side collision energy. In other words, the rear vehicle body structure provided by the embodiment of the present invention improves the side collision performance by at least 97% compared to the existing structure.

[0059] In the embodiment of the present invention, the first cavity structure and the third cavity structure are connected through the second cavity structure and the fourth cavity structure to form an annular cavity structure. When the right side panel inner panel assembly 2 is subjected to a side collision, the impact energy of the collision is transmitted through the second cavity structure of the right side panel inner panel assembly 2 to the third cavity structure of the top cover middle crossbeam assembly 3 and the first cavity structure of the lower body welding assembly 1, and then to the fourth cavity structure of the left side panel inner panel assembly 4. This facilitates the dispersion of the impact energy of the collision, optimizes the force transmission path, and improves the side collision performance of the vehicle to meet the side collision performance requirements of the latest version of C-NCAP, solving the problem in the prior art that the rear vehicle body structure cannot meet the required improved side collision performance. In addition, due to the high strength and stability of the rear seat mounting crossbeam assembly 11, the second cavity structure of the right side panel inner panel assembly 2 and the fourth cavity structure of the left side panel inner panel assembly 4 are connected to the first cavity structure formed by the rear seat mounting crossbeam assembly 11 and the lower body welding assembly body 16, which can further improve the side collision performance of the vehicle.

[0060] Reference Figure 3 and Figure 6 、 Figure 10The right side panel inner panel assembly 2 includes a first side panel sill reinforcement rear connecting plate 22, a first side panel rear lower inner panel reinforcement 23 connected to the first side panel sill reinforcement rear connecting plate 22, a first rear wheel bulge outer panel front connecting plate 24 connected to the first side panel rear lower inner panel reinforcement 23, a first side panel rear upper inner panel connecting piece 26 connected to the first rear wheel bulge outer panel front connecting plate 24, and a first rear wheel bulge inner panel inner reinforcement 25 connected to the first side panel rear upper inner panel connecting piece 26; the first side panel sill reinforcement rear connecting plate 22, the first side panel rear lower inner panel reinforcement 23, the first rear wheel bulge outer panel front connecting plate 24, the first rear wheel bulge inner panel inner reinforcement 25 and the first side panel rear upper inner panel connecting piece 26 form a second cavity structure.

[0061] Specifically, the first rear wheel bulge outer panel front connecting plate 24 is used to connect the first side panel rear lower inner panel reinforcement 23 and the first side panel rear upper inner panel connecting member 26. The first side panel sill reinforcement rear connecting plate 22 and the first side panel rear lower inner panel reinforcement 23 can be connected by welding, riveting, screwing, etc. The first side panel rear lower inner panel reinforcement 23 and the first rear wheel bulge outer panel front connecting plate 24 can be connected by welding, riveting, screwing, etc. The first rear wheel bulge outer panel front connecting plate 24 and the first side panel rear upper inner panel connecting member 26 can be connected by welding, riveting, screwing, etc. The first rear wheel bulge inner panel inner reinforcement 25 and the first side panel rear upper inner panel connecting member 26 can be connected by welding, riveting, screwing, etc.

[0062] In the embodiment of the present invention, by setting the front connecting plate 24 of the first rear wheel bulge outer panel, the first side panel rear lower inner panel reinforcement 23 and the first side panel rear upper inner panel connecting member 26 can be connected, and together with the first rear wheel bulge inner panel inner reinforcement 25, a cavity is formed, thereby expanding the cavity structure of the right side panel inner panel assembly 2 and improving the collision resistance of the right side panel inner panel assembly 2.

[0063] Reference Figure 5 and Figure 12 The left side panel inner panel assembly 4 includes a second side panel sill reinforcement rear connecting plate 42, a second side panel rear lower inner panel reinforcement 43 connected to the second side panel rear lower inner panel reinforcement 43, a second rear wheel bulge outer panel front connecting plate 44 connected to the second side panel rear lower inner panel reinforcement 43, a second side panel rear upper inner panel connector 46 connected to the second rear wheel bulge outer panel front connecting plate 44, and a second rear wheel bulge inner panel inner reinforcement 45 connected to the second side panel rear upper inner panel connector 46; the second side panel sill reinforcement rear connecting plate 42, the second side panel rear lower inner panel reinforcement 43, the second rear wheel bulge outer panel front connecting plate 44, the second rear wheel bulge inner panel inner reinforcement 45 and the second side panel rear upper inner panel connector 46 form the fourth cavity structure.

[0064] Specifically, the second rear wheel bulge outer panel front connecting plate 44 is used to connect the second side panel rear lower inner panel reinforcement 43 and the second side panel rear upper inner panel connecting member 46. The second side panel sill reinforcement rear connecting plate 42 and the second side panel rear lower inner panel reinforcement 43 can be connected by welding, riveting, screwing, etc. The second side panel rear lower inner panel reinforcement 43 and the second rear wheel bulge outer panel front connecting plate 44 can be connected by welding, riveting, screwing, etc. The second rear wheel bulge outer panel front connecting plate 44 and the second side panel rear upper inner panel connecting member 46 can be connected by welding, riveting, screwing, etc. The second side panel rear upper inner panel connecting member 46 and the second rear wheel bulge inner panel inner reinforcement 45 can be connected by welding, riveting, screwing, etc.

[0065] In the embodiment of the present invention, by setting the front connecting plate 44 of the second rear wheel bulge outer panel, the second side panel rear lower inner panel reinforcement 43 and the second side panel rear upper inner panel connecting member 46 can be connected, and together with the second rear wheel bulge inner panel inner reinforcement 45, a cavity is formed, thereby expanding the cavity structure of the left side panel inner panel assembly 4 and improving the collision resistance of the left side panel inner panel assembly 4.

[0066] Reference Figures 1 to 3 、 Figure 5 and Figure 7 The lower body welding assembly 1 also includes a first sill side beam 12, a second sill side beam 15, a first rear floor front connecting member 13 and a second rear floor front connecting member 14. The first sill side beam 12 and the second sill side beam 15 are respectively connected to the two ends of the rear seat mounting crossbeam assembly 11, the first rear floor front connecting member 13 is connected to the first sill side beam 12, and the second rear floor front connecting member 14 is connected to the second sill side beam 15; the right side inner panel assembly 2 also includes a first rear wheel hub outer panel 21 connected to the first side sill reinforcement rear connecting plate 22, the first rear floor front connecting member 13, the first rear wheel hub outer panel 21 and the first The rear connecting plate 22 of the side sill reinforcement forms a right lower connecting cavity, the first sill side beam 12 has a first sill cavity, and the second cavity structure is connected to the first cavity structure through the right lower connecting cavity and the first sill cavity; the left side inner panel assembly 4 also includes a second rear wheel hub package outer plate 41 connected to the second side sill reinforcement rear connecting plate 42, the second rear floor front connecting piece 14, the second rear wheel hub package outer plate 41 and the second side sill reinforcement rear connecting plate 42 form a left lower connecting cavity, the second sill side beam 15 has a second sill cavity, and the fourth cavity structure is connected to the first cavity structure through the left lower connecting cavity and the second sill cavity.

[0067] Specifically, the first sill side beam 12 and the second sill side beam 15 can be connected to the rear seat mounting crossbeam assembly 11 by welding, riveting, screwing, etc., the first rear floor front connector 13 can be connected to the first sill side beam 12 by welding, riveting, screwing, etc., and the second rear floor front connector 14 can be connected to the second sill side beam 15 by welding, riveting, screwing, etc. The first sill cavity and the second sill cavity are respectively connected to the two ends of the first cavity structure. The lower right connecting cavity is connected to the second cavity structure, and the lower right connecting cavity is connected to the first sill cavity. The lower left connecting cavity is connected to the fourth cavity structure, and the lower left connecting cavity is connected to the second sill cavity.

[0068] The right side inner panel assembly 2 also includes a first rear hub package inner panel 29 connected to the first rear hub package outer panel 21. The first rear hub package outer panel 21 and the first rear hub package inner panel 29 can be connected by welding, riveting, screwing, etc., and the first rear hub package outer panel 21 and the first side sill reinforcement rear connecting plate 22 can be connected by welding, riveting, screwing, etc. The left side inner panel assembly 4 also includes a second rear hub package inner panel 49 connected to the second rear hub package outer panel 41. The second rear hub package outer panel 41 and the second rear hub package inner panel 49 can be connected by welding, riveting, screwing, etc., and the second rear hub package outer panel 41 and the second side sill reinforcement rear connecting plate 42 can be connected by welding, riveting, screwing, etc.

[0069] In the embodiment of the present invention, the right lower connecting cavity and the first sill side beam 12 are formed by the first rear floor front connecting member 13, the first rear wheel hub package outer panel 21 and the first side sill reinforcement rear connecting plate 22, thereby realizing the connection between the second cavity structure and the first cavity structure. The left lower connecting cavity and the second sill side beam 15 are formed by the second rear floor front connecting member 14, the second rear wheel hub package outer panel 41 and the second side sill reinforcement rear connecting plate 42, thereby realizing the connection between the fourth cavity structure and the first cavity structure. That is, the first rear floor front connecting member 13, the first sill side beam 12, the second rear floor front connecting member 14 and the second sill side beam 15 are reasonably utilized to realize the connection between the first cavity structure and the second cavity structure and the fourth cavity structure, thereby saving costs.

[0070] The first side panel sill reinforcement rear connecting plate 22 is a thermoformed sheet metal part, the first side panel rear lower inner panel reinforcement 23 is a thermoformed sheet metal part, the second side panel sill reinforcement rear connecting plate 42 is a thermoformed sheet metal part, and the second side panel rear lower inner panel reinforcement 43 is a thermoformed sheet metal part.

[0071] Specifically, the first side sill reinforcement rear connecting plate 22, the first side rear lower inner panel reinforcement 23, the second side sill reinforcement rear connecting plate 42, and the second side rear lower inner panel reinforcement 43 are all thermoformed sheet metal parts. A thermoformed sheet metal part is a workpiece made of high-strength steel through hot stamping. In this embodiment of the present invention, the configuration of the first side sill reinforcement rear connecting plate 22, the first side rear lower inner panel reinforcement 23, the second side sill reinforcement rear connecting plate 42, and the second side rear lower inner panel reinforcement 43 as thermoformed sheet metal parts ensures that the first side sill reinforcement rear connecting plate 22, the first side rear lower inner panel reinforcement 23, the second side sill reinforcement rear connecting plate 42, and the second side rear lower inner panel reinforcement 43 have extremely high strength and ductility, thereby improving the collision resistance of the right side inner panel assembly 2 and the left side inner panel assembly 4.

[0072] Reference Figures 3 to 6 The top cover middle cross beam assembly 3 includes a top cover middle cross beam inner plate 31 and a top cover middle cross beam outer plate 32 connected to the top cover middle cross beam inner plate 31, and the top cover middle cross beam inner plate 31 and the top cover middle cross beam outer plate 32 form a third cavity structure; the right side inner panel assembly 2 also includes a first inner connecting plate 28 and a first outer connecting plate 27 connected to the first inner connecting plate 28, the first outer connecting plate 27 and the first inner connecting plate 28 form a right upper connecting cavity, and the right upper connecting cavity is connected to the second cavity structure; the left side inner panel assembly 4 also includes a second inner connecting plate 48 and a second outer connecting plate 47 connected to the second inner connecting plate 48, the second outer connecting plate 47 and the second inner connecting plate 48 form a left upper connecting cavity, and the left upper connecting cavity is connected to the fourth cavity structure.

[0073] Specifically, the first outer connecting plate 27 and the first inner connecting plate 28 can be connected by welding, riveting, screwing, etc. The first outer connecting plate 27 is also connected to the first rear wheel bulge inner panel inner reinforcement 25. The first outer connecting plate 27 and the first rear wheel bulge inner panel inner reinforcement 25 can be connected by welding, riveting, screwing, etc. The first inner connecting plate 28 is also connected to the first rear wheel bulge inner panel inner reinforcement 25. The first inner connecting plate 28 and the first rear wheel bulge inner panel inner reinforcement 25 can be connected by welding, riveting, screwing, etc.

[0074] The second outer connecting plate 47 and the second inner connecting plate 48 can be connected by welding, riveting, screwing, etc. The second outer connecting plate 47 is also connected to the second rear wheel bulge inner plate inner reinforcement 45. The second outer connecting plate 47 and the second rear wheel bulge inner plate inner reinforcement 45 can be connected by welding, riveting, screwing, etc. The second inner connecting plate 48 is also connected to the second rear wheel bulge inner plate inner reinforcement 45. The second inner connecting plate 48 and the second rear wheel bulge inner plate inner reinforcement 45 can be connected by welding, riveting, screwing, etc.

[0075] Reference Figure 11 , the inner plate 31 of the middle cross beam of the top cover and the outer plate 32 of the middle cross beam of the top cover form a third cavity structure. The connection method between the inner plate 31 of the middle cross beam of the top cover and the outer plate 32 of the middle cross beam of the top cover can be welding, riveting, screwing, etc. The third cavity structure has a first end and a second end along the width direction of the car. The first end of the third cavity structure is connected to the second cavity structure through the upper right connecting cavity, and the second end of the third cavity structure is connected to the fourth cavity structure through the upper left connecting cavity. The first end of the third cavity structure is connected to the upper right connecting cavity, and the upper right connecting cavity is connected to the second cavity structure. The second end of the third cavity structure is connected to the upper left connecting cavity, and the upper left connecting cavity is connected to the fourth cavity structure. In the embodiment of the present invention, the connection between the third cavity structure and the second cavity structure is achieved by the arrangement of the first outer connecting plate 27 and the first inner connecting plate 28, and the connection between the third cavity structure and the fourth cavity structure is achieved by the arrangement of the second outer connecting plate 47 and the second inner connecting plate 48.

[0076] The first rear floor front connecting piece 13 is welded to the first rear wheel hub package outer panel 21, and the second rear floor front connecting piece 14 is welded to the second rear wheel hub package outer panel 41; the top cover middle cross beam inner panel 31 is welded to the first inner connecting plate 28, the top cover middle cross beam outer panel 32 is welded to the first outer connecting plate 27, the top cover middle cross beam inner panel 31 is welded to the second inner connecting plate 48, and the top cover middle cross beam outer panel 32 is welded to the second outer connecting plate 47.

[0077] Specifically, the roof center cross beam inner panel 31 has a first end and a second end along the width direction of the vehicle. The first end of the roof center cross beam inner panel 31 is welded to the first inner connecting plate 28, and the second end of the roof center cross beam inner panel 31 is welded to the second inner connecting plate 48. The roof center cross beam outer panel 32 has a first end and a second end along the width direction of the vehicle. The first end of the roof center cross beam outer panel 32 is welded to the first outer connecting plate 27, and the second end of the roof center cross beam outer panel 32 is welded to the second outer connecting plate 47.

[0078] In the embodiment of the present invention, through the above-mentioned arrangement, the connection performance between the lower body welding assembly 1 and the right side inner panel assembly 2 and the left side inner panel assembly 4 is guaranteed, and the connection performance between the top cover middle cross beam assembly 3 and the right side inner panel assembly 2 and the left side inner panel assembly 4 is guaranteed.

[0079] The first rear wheel bulge outer panel front connecting plate 24 is welded to the first side panel rear lower inner panel reinforcement 23, and the first rear wheel bulge outer panel front connecting plate 24 is welded to the first side panel rear upper inner panel connecting piece 26. In this embodiment of the present invention, by welding the first rear wheel bulge outer panel front connecting plate 24 to the first side panel rear lower inner panel reinforcement 23 and the first side panel rear upper inner panel connecting piece 26, the connection strength of the first rear wheel bulge outer panel front connecting plate 24 is met, and the connection performance of the first rear wheel bulge outer panel front connecting plate 24 is good.

[0080] The second rear wheel bulge outer panel front connecting plate 44 is welded to the second side panel rear lower inner panel reinforcement 43, and the second rear wheel bulge outer panel front connecting plate 44 is welded to the second side panel rear upper inner panel connecting piece 46. In this embodiment of the present invention, by welding the second rear wheel bulge outer panel front connecting plate 44 to the second side panel rear lower inner panel reinforcement 43 and the second side panel rear upper inner panel connecting piece 46, the connection strength of the second rear wheel bulge outer panel front connecting plate 44 is met, and the connection performance of the second rear wheel bulge outer panel front connecting plate 44 is good.

[0081] The thickness of the rear connecting plate 22 of the first side panel sill reinforcement is 1.3mm-1.5mm, the thickness of the first side panel rear lower inner panel reinforcement 23 is 1.3mm-1.5mm, the thickness of the rear connecting plate 42 of the second side panel sill reinforcement is 1.3mm-1.5mm, and the thickness of the second side panel rear lower inner panel reinforcement 43 is 1.3mm-1.5mm.

[0082] Specifically, the thickness of the first side sill reinforcement rear connecting plate 22 can be 1.3 mm, 1.4 mm, 1.5 mm, etc., and preferably 1.4 mm. The thickness of the first side sill reinforcement rear connecting plate 22 can be 1.3 mm, 1.4 mm, 1.5 mm, etc., and preferably 1.4 mm. The thickness of the first side rear lower inner panel reinforcement 23 can be 1.3 mm, 1.4 mm, 1.5 mm, etc., and preferably 1.4 mm. The thickness of the second side sill reinforcement rear connecting plate 42 can be 1.3 mm, 1.4 mm, 1.5 mm, etc., and preferably 1.4 mm. The thickness of the second side rear lower inner panel reinforcement 43 can be 1.3 mm, 1.4 mm, 1.5 mm, etc., and preferably 1.4 mm. In the embodiment of the present invention, by setting the thickness of the first side panel sill reinforcement rear connecting plate 22, the thickness of the first side panel rear lower inner panel reinforcement 23, the thickness of the second side panel sill reinforcement rear connecting plate 42, and the thickness of the second side panel rear lower inner panel reinforcement 43 within this range, the strength of the first side panel sill reinforcement rear connecting plate 22, the first side panel rear lower inner panel reinforcement 23, the second side panel sill reinforcement rear connecting plate 42, and the second side panel rear lower inner panel reinforcement 43 is improved.

[0083] Reference Figure 1Along the first direction, the position of the first end of the third cavity structure is aligned with the position of the first end of the upper right connecting cavity, the position of the second end of the third cavity structure is aligned with the position of the first end of the upper left connecting cavity, the position of the second end of the upper right connecting cavity is aligned with the position of one end of the second cavity structure close to the cross beam assembly 3 in the top cover, and the position of the second end of the upper left connecting cavity is aligned with the position of one end of the fourth cavity structure close to the cross beam assembly 3 in the top cover. The first direction is perpendicular to the extension direction of the rear seat mounting cross beam assembly 11.

[0084] Specifically, the extension direction of the rear seat mounting crossbeam assembly 11 is the width direction of the car, and the first direction is the length direction of the car. The third cavity structure has a first end and a second end along the width direction of the car. The upper right connecting cavity has a first end close to the third cavity structure and a second end away from the third cavity structure, and the upper left connecting cavity has a first end close to the third cavity structure and a second end away from the third cavity structure. The position of the first end of the third cavity structure is aligned with the position of the first end of the upper right connecting cavity, that is, along the length direction of the car, there is no misalignment between the first end of the third cavity structure and the first end of the upper right connecting cavity. The position of the second end of the third cavity structure is aligned with the position of the first end of the upper left connecting cavity, that is, along the length direction of the car, there is no misalignment between the second end of the third cavity structure and the first end of the upper left connecting cavity.

[0085] The second end of the upper right connecting cavity is aligned with the position of the second cavity structure near the end of the top cover center cross beam assembly 3, that is, along the length of the vehicle, there is no misalignment between the second end of the upper right connecting cavity and the end of the second cavity structure near the top cover center cross beam assembly 3. The second end of the upper left connecting cavity is aligned with the position of the fourth cavity structure near the end of the top cover center cross beam assembly 3, that is, along the length of the vehicle, there is no misalignment between the second end of the upper left connecting cavity and the end of the fourth cavity structure near the top cover center cross beam assembly 3. In this embodiment of the present invention, the above-mentioned arrangement ensures that the impact energy during a side collision can be dispersed.

[0086] It should be noted that, along the length of the vehicle, a 150mm misalignment is permitted between the second end of the upper right connecting cavity and the end of the fourth cavity structure near the roof center cross beam assembly 3. Along the length of the vehicle, a 150mm misalignment is permitted between the second end of the upper left connecting cavity and the end of the second cavity structure near the roof center cross beam assembly 3.

[0087] It can be understood that the above examples are merely examples listed for a better understanding of the technical solutions of the embodiments of the present invention, and are not intended to be the sole limitation on the embodiments of the present invention.

[0088] In a second aspect, embodiments of the present invention provide a vehicle body structure comprising any of the rear vehicle body structures described in the first aspect. Because the vehicle body structure comprises the aforementioned rear vehicle body structure, it also exhibits the beneficial effects of the aforementioned rear vehicle body structures. The vehicle body structure provided by embodiments of the present invention includes the various components of the rear vehicle body structure described in any of the aforementioned embodiments, and to avoid repetition, these components are not further described here.

[0089] In a third aspect, embodiments of the present invention provide an automobile, comprising any of the rear vehicle body structures described in the first aspect. Because the automobile comprises the aforementioned rear vehicle body structure, it also exhibits the beneficial effects of the aforementioned rear vehicle body structure. The automobile provided by the embodiments of the present invention includes the various components of the rear vehicle body structure described in any of the aforementioned embodiments, which will not be described in detail here to avoid repetition.

[0090] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A vehicle body rear structure, characterized in that: The vehicle comprises a lower body welding assembly (1), a right side inner panel assembly (2), a top cover middle crossbeam assembly (3) and a left side inner panel assembly (4), wherein the lower body welding assembly (1) comprises a lower body welding assembly body (16) and a rear seat mounting crossbeam assembly (11), and the rear seat mounting crossbeam assembly (11) and the lower body welding assembly body (16) form a first cavity structure; The right side inner panel assembly (2) has a second cavity structure, the top cover middle cross beam assembly (3) has a third cavity structure, and the left side inner panel assembly (4) has a fourth cavity structure, and the first cavity structure and the third cavity structure are connected through the second cavity structure and the fourth cavity structure to form an annular cavity structure; The right side inner panel assembly (2) includes a first side panel door sill reinforcement rear connecting plate (22), a first side panel rear lower inner panel reinforcement (23) connected to the first side panel door sill reinforcement rear connecting plate (22), a first rear wheel bulge outer panel front connecting plate (24) connected to the first side panel rear lower inner panel reinforcement (23), a first side panel rear upper inner panel connecting member (26) connected to the first rear wheel bulge outer panel front connecting plate (24), and a first rear wheel bulge inner panel inner reinforcement (25) connected to the first side panel rear upper inner panel connecting member (26); the first side panel door sill reinforcement rear connecting plate (22), the first side panel rear lower inner panel reinforcement (23), the first rear wheel bulge outer panel front connecting plate (24), the first rear wheel bulge inner panel inner reinforcement (25) and the first side panel rear upper inner panel connecting member (26) form the second cavity structure; The lower body welding assembly (1) further includes a first sill side beam (12) and a first rear floor front connecting member (13), wherein the first rear floor front connecting member (13) is connected to the first sill side beam (12); the right side inner panel assembly (2) further includes a first rear wheel hub outer panel (21) connected to the first side sill reinforcement rear connecting plate (22), wherein the first rear floor front connecting member (13), the first rear wheel hub outer panel (21) and the first side sill reinforcement rear connecting plate (22) form a right lower connecting cavity, the first sill side beam (12) has a first sill cavity, and the second cavity structure is connected to the first cavity structure through the right lower connecting cavity and the first sill cavity.

2. The vehicle body rear structure according to claim 1, characterized in that: The left side panel assembly (4) includes a second side panel door sill reinforcement rear connecting plate (42), a second side panel rear lower inner panel reinforcement (43) connected to the second side panel door sill reinforcement rear connecting plate (42), a second rear wheel bulge outer panel front connecting plate (44) connected to the second side panel rear lower inner panel reinforcement (43), a second side panel rear upper inner panel connecting member (46) connected to the second rear wheel bulge outer panel front connecting member (44), and a second rear wheel bulge inner panel inner reinforcement (45) connected to the second side panel rear upper inner panel connecting member (46); The second side panel door sill reinforcement rear connecting plate (42), the second side panel rear lower inner panel reinforcement (43), the second rear wheel bulge outer panel front connecting plate (44), the second rear wheel bulge inner panel inner side reinforcement (45) and the second side panel rear upper inner panel connecting member (46) form the fourth cavity structure.

3. The vehicle body rear structure according to claim 2, characterized in that: The lower body welding assembly (1) further includes a second door sill side beam (15) and a second rear floor front connecting member (14), wherein the first door sill side beam (12) and the second door sill side beam (15) are respectively connected to two ends of the rear seat mounting crossbeam assembly (11), and the second rear floor front connecting member (14) is connected to the second door sill side beam (15); The left side panel assembly (4) further includes a second rear wheel hub outer panel (41) connected to the second side panel sill reinforcement rear connecting plate (42); the second rear floor front connecting member (14), the second rear wheel hub outer panel (41) and the second side panel sill reinforcement rear connecting plate (42) form a left lower connecting cavity; the second sill side beam (15) has a second sill cavity; the fourth cavity structure is connected to the first cavity structure through the left lower connecting cavity and the second sill cavity.

4. The vehicle body rear structure according to claim 2, wherein: The first side panel door sill reinforcement rear connecting plate (22) is a thermoformed sheet metal part, the first side panel rear lower inner panel reinforcement (23) is a thermoformed sheet metal part, the second side panel door sill reinforcement rear connecting plate (42) is a thermoformed sheet metal part, and the second side panel rear lower inner panel reinforcement (43) is a thermoformed sheet metal part.

5. The vehicle body rear structure according to claim 3, characterized in that: The top cover middle cross beam assembly (3) comprises a top cover middle cross beam inner plate (31) and a top cover middle cross beam outer plate (32) connected to the top cover middle cross beam inner plate (31), wherein the top cover middle cross beam inner plate (31) and the top cover middle cross beam outer plate (32) form the third cavity structure; The right side inner panel assembly (2) further comprises a first inner connecting plate (28) and a first outer connecting plate (27) connected to the first inner connecting plate (28), wherein the first outer connecting plate (27) and the first inner connecting plate (28) form a right upper connecting cavity, and the third cavity structure is connected to the second cavity structure through the right upper connecting cavity; The left side inner panel assembly (4) further includes a second inner connecting plate (48) and a second outer connecting plate (47) connected to the second inner connecting plate (48), wherein the second outer connecting plate (47) and the second inner connecting plate (48) form an upper left connecting cavity, and the third cavity structure is connected to the fourth cavity structure through the upper left connecting cavity.

6. The vehicle body rear structure according to claim 5, characterized in that: The first rear floor front connecting piece (13) is welded to the first rear wheel hub outer plate (21), and the second rear floor front connecting piece (14) is welded to the second rear wheel hub outer plate (41); The inner plate (31) of the top cover middle cross beam is welded to the first inner connecting plate (28), the outer plate (32) of the top cover middle cross beam is welded to the first outer connecting plate (27), the inner plate (31) of the top cover middle cross beam is welded to the second inner connecting plate (48), and the outer plate (32) of the top cover middle cross beam is welded to the second outer connecting plate (47).

7. The vehicle body rear structure according to claim 2, characterized in that: The first rear wheel bulge outer panel front connecting plate (24) is welded to the first side panel rear lower inner panel reinforcement (23), and the first rear wheel bulge outer panel front connecting plate (24) is welded to the first side panel rear upper inner panel connecting member (26); The second rear wheel bulge outer panel front connecting plate (44) is welded to the second side enclosure rear lower inner panel reinforcement (43), and the second rear wheel bulge outer panel front connecting plate (44) is welded to the second side enclosure rear upper inner panel connecting member (46).

8. The vehicle body rear structure according to claim 2, wherein: The thickness of the rear connecting plate (22) of the first side panel sill reinforcement is 1.3 mm to 1.5 mm, the thickness of the rear lower inner panel reinforcement (23) of the first side panel is 1.3 mm to 1.5 mm, the thickness of the rear connecting plate (42) of the second side panel sill reinforcement is 1.3 mm to 1.5 mm, and the thickness of the rear lower inner panel reinforcement (43) of the second side panel is 1.3 mm to 1.5 mm.

9. The vehicle body rear structure according to claim 5, characterized in that: Along the first direction, the position of the first end of the third cavity structure is aligned with the position of the first end of the right upper connecting cavity, the position of the second end of the third cavity structure is aligned with the position of the first end of the left upper connecting cavity, the position of the second end of the right upper connecting cavity is aligned with the position of the second cavity structure near one end of the cross beam assembly (3) in the top cover, and the position of the second end of the left upper connecting cavity is aligned with the position of the fourth cavity structure near one end of the cross beam assembly (3) in the top cover. The first direction is perpendicular to the extension direction of the rear seat mounting cross beam assembly (11).

10. A vehicle body structure, characterized in that: The vehicle body rear structure comprises the vehicle body rear structure according to any one of claims 1 to 9.

11. An automobile, characterized in that: The vehicle body rear structure comprises the vehicle body rear structure according to any one of claims 1 to 9.

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