Rear automobile body structure and automobile

Abstract

The utility model provides a rear automobile body structure and an automobile, in the rear automobile body structure, a floor framework assembly comprises two floor longitudinal beams and at least two cross beams arranged between the two floor longitudinal beams; each rear wheel cover assembly comprises a rear wheel cover main body and at least two rear wheel cover reinforcing plates arranged on the rear wheel cover main body at intervals; the number of the rear wheel cover connecting plates is at least two, each rear wheel cover reinforcing plate is in lap joint with the first end of one rear wheel cover connecting plate, and the second end of each rear wheel cover connecting plate is in lap joint with the cross beam, so that a force transmission channel is formed among the rear wheel cover reinforcing plates, the rear wheel cover connecting plates and the cross beam in lap joint with the rear wheel cover reinforcing plates and the rear wheel cover connecting plates. According to the utility model, a force transmission channel is formed among the rear wheel cover reinforcing plate, the rear wheel cover connecting plate and the cross beam which is lapped with the rear wheel cover reinforcing plate and the rear wheel cover connecting plate, so that the whole rear vehicle body structure can be communicated, the force transmission path of the whole rear vehicle body structure is more coherent and tightly combined, and the bending rigidity, durability, reliability and NVH (Noise Vibration and Harshness) performance of the whole vehicle are greatly improved.

Description

Technical Field

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

[0002] With the rapid development of automotive technology, demands for vehicle performance and reliability are becoming increasingly stringent. Rear body structures have a large number of parts, complex joints, and are subject to impact loads from the chassis. Simplifying these complexities and improving the durability and reliability of rear body structures has become a research priority for a growing number of automakers.

[0003] In the existing rear body structure, the welding and assembly process between the rear wheel cover assembly and the floor frame assembly is complicated, the force transmission path of the entire rear body structure is not consistent enough, and the welding strength and durability reliability are difficult to guarantee. Utility Model Content

[0004] The utility model provides a rear body structure and a car, which solve the problems of the existing rear body structure in that the force transmission path is not consistent enough and the welding strength and durability reliability are difficult to ensure.

[0005] A rear vehicle body structure includes a floor frame assembly, a rear wheel cover connecting plate, and two rear wheel cover assemblies symmetrically arranged on both sides of the floor frame assembly;

[0006] The floor frame assembly includes two floor longitudinal beams and at least two cross beams arranged between the two floor longitudinal beams;

[0007] Each of the rear wheel cover assemblies includes a rear wheel cover body and at least two rear wheel cover reinforcement plates spaced apart from each other on the rear wheel cover body;

[0008] There are at least two rear wheel cover connecting plates, each of the rear wheel cover reinforcement plates is overlapped with the first end of a rear wheel cover connecting plate, and the second end of each rear wheel cover connecting plate is overlapped with the cross beam, so that a force transmission channel is formed between the rear wheel cover reinforcement plate, the rear wheel cover connecting plate and the cross beam they are overlapped with.

[0009] Preferably, the rear wheelhouse connecting plate includes a first rear wheelhouse connecting plate and a second rear wheelhouse connecting plate, the rear wheelhouse reinforcement plate of each rear wheelhouse assembly includes a first rear wheelhouse reinforcement plate and a second rear wheelhouse reinforcement plate spaced apart and arranged on the rear wheelhouse main body, and the crossbeam includes a first crossbeam and a second crossbeam;

[0010] Each of the first rear wheelhouse reinforcement plates overlaps a first end of a first rear wheelhouse connecting plate, and a second end of each of the first rear wheelhouse connecting plates overlaps one end of the first crossbeam, so that a first force transmission channel is formed between the two first rear wheelhouse reinforcement plates, the two first rear wheelhouse connecting plates, and the overlapped first crossbeam;

[0011] Each of the second rear wheel cover reinforcement plates is overlapped with the first end of a second rear wheel cover connecting plate, and the second end of each of the second rear wheel cover connecting plates is overlapped with one end of the second cross beam, so that a second force transmission channel is formed between the two second rear wheel cover reinforcement plates, the two second rear wheel cover connecting plates and the second cross beam they are overlapped with.

[0012] Preferably, the rear body structure further comprises two rear side inner panels;

[0013] The two rear side inner panels are respectively connected to the two ends of the first force transmission channel, and the two rear side inner panels are respectively connected to the two ends of the second force transmission channel.

[0014] Preferably, the rear vehicle body structure further includes two rear side inner panel reinforcement plates and two rear side inner panel connecting plates;

[0015] The first end of each of the rear side panel inner panel reinforcement plates is connected to the first force transmission channel, and the second end of each of the rear side panel inner panel reinforcement plates is connected to one of the rear side panel inner panels;

[0016] The first end of each of the rear side panel inner panel connecting plates is connected to the second force transmission channel, and the second end of each of the rear side panel inner panel connecting plates is connected to one of the rear side panel inner panels.

[0017] Preferably, the rear body structure further includes a roof rear cross member and two D-pillar assemblies;

[0018] The two D-pillar assemblies are respectively connected to the two rear side wall inner panels;

[0019] The two ends of the rear cross beam of the top cover are respectively connected to the two D-pillar assemblies.

[0020] Preferably, the crossbeam further comprises a third crossbeam;

[0021] The rear body structure also includes two rear side reinforcement panels;

[0022] The first end of each rear side reinforcement plate overlaps with a floor longitudinal beam and is aligned with the third cross beam, so that a third force transmission channel is formed between the two rear side reinforcement plates, the two floor longitudinal beams and the overlapped third cross beam.

[0023] Preferably, the rear vehicle body structure further comprises a floor panel, and the floor panel is arranged on the floor frame assembly;

[0024] The floor frame assembly further comprises a floor reinforcement member, which is provided on at least one transverse beam and / or at least one floor longitudinal beam of the floor frame assembly.

[0025] Preferably, the floor frame assembly and the rear wheel cover assembly are both integrally formed structures.

[0026] Preferably, the rear wheel cover assembly also includes a rear spring tower seat bracket; the rear spring tower seat bracket is arranged on the side of the rear wheel cover body away from the rear wheel cover connecting plate; the rear spring tower seat bracket is arranged corresponding to one of the rear wheel cover reinforcement plates.

[0027] An automobile comprises the rear body structure.

[0028] In the aforementioned rear vehicle body structure and automobile, the floor frame assembly includes two floor longitudinal beams and at least two cross beams. During installation, the two floor longitudinal beams are positioned opposite each other in the left-right direction of the vehicle, and the at least two cross beams are spaced apart between the two floor longitudinal beams in the front-to-back direction of the vehicle. Two rear wheelhouse assemblies are symmetrically positioned on either side of the floor frame assembly. Each rear wheelhouse assembly includes a rear wheelhouse body and at least two rear wheelhouse reinforcement plates. During installation, the two rear wheelhouse bodies are positioned on the two floor longitudinal beams, respectively, and the at least two rear wheelhouse reinforcement plates are spaced apart on each rear wheelhouse body in the front-to-back direction of the vehicle. There are at least two rear wheelhouse connecting plates, each of which overlaps a first end of a rear wheelhouse connecting plate and overlaps a second end of each rear wheelhouse connecting plate with the cross beam. This arrangement connects the floor frame assembly and the rear wheelhouse assembly via the rear wheelhouse connecting plates, simplifying the welding and assembly processes between the rear wheelhouse assembly and the floor frame assembly. The welded layers do not need to avoid each other or require cutting holes, thereby improving overall rigidity and durability while also ensuring weld point strength. In this example, a force transmission channel is formed between the rear wheel arch reinforcement plate, the rear wheel arch connecting plate and the crossbeam they overlap, which can integrate the entire rear body structure, making the force transmission path of the entire rear body structure more coherent and tightly integrated, greatly improving the vehicle's bending and torsional stiffness, durability, reliability and NVH performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 This is an isometric view of the first portion of the rear vehicle body structure in one embodiment of the present invention;

[0031] Figure 2 This is an isometric view of the second portion of the rear vehicle body structure in one embodiment of the present invention;

[0032] Figure 3This is an isometric view of a rear wheel housing connecting plate in one embodiment of the present invention;

[0033] Figure 4 This is a top view of a floor frame assembly in one embodiment of the present utility model;

[0034] Figure 5 yes Figure 1 Cross-sectional view at AA in the middle;

[0035] Figure 6 yes Figure 1 Cross-sectional view at the middle BB;

[0036] Figure 7 yes Figure 1 Cross-sectional view at CC;

[0037] Figure 8 yes Figure 1 Cross-sectional view at DD in the middle;

[0038] Figure 9 This is an axonometric view of the rear vehicle body structure in one embodiment of the present invention;

[0039] Figure 10 It is a force transmission path diagram of the rear vehicle body structure in one embodiment of the present utility model.

[0040] Among them, 1. Floor frame assembly; 11. Floor longitudinal beam; 12. Cross beam; 121. First cross beam; 122. Second cross beam; 123. Third cross beam; 124. Fourth cross beam; 13. Floor reinforcement; 2. Rear wheelhouse connecting plate; 21. First rear wheelhouse connecting plate; 22. Second rear wheelhouse connecting plate; 3. Rear wheelhouse assembly; 31. Rear wheelhouse main body; 32. Rear wheelhouse reinforcement plate; 321. First rear wheelhouse reinforcement plate; 322. Second rear wheelhouse reinforcement plate; 33. Rear spring tower seat bracket; 4. Rear side panel reinforcement plate; 5. Floor panel; 6. Rear side panel inner panel; 7. D-pillar assembly; 71. D-pillar inner reinforcement plate; 72. D-pillar outer reinforcement plate; 8. Top cover rear cross beam; 9. Rear side panel inner panel reinforcement plate; 10. Rear side panel inner panel connecting plate. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0043] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0044] The embodiment of the utility model provides a rear vehicle body structure, referring to Figure 1-10 The rear vehicle body structure includes a floor frame assembly 1, a rear wheelhouse connecting plate 2 and two rear wheelhouse assemblies 3 symmetrically arranged on both sides of the floor frame assembly 1; the floor frame assembly 1 includes two floor longitudinal beams 11 and at least two cross beams 12 arranged between the two floor longitudinal beams 11; each rear wheelhouse assembly 3 includes a rear wheelhouse body 31 and at least two rear wheelhouse reinforcement plates 32 spaced apart on the rear wheelhouse body 31; there are at least two rear wheelhouse connecting plates 2, each rear wheelhouse reinforcement plate 32 overlaps a first end of a rear wheelhouse connecting plate 2, and the second end of each rear wheelhouse connecting plate 2 overlaps the cross beam 12, so that a force transmission channel is formed between the rear wheelhouse reinforcement plate 32, the rear wheelhouse connecting plate 2 and the cross beam 12 overlapped therewith.

[0045] As an example, the rear vehicle body structure includes a floor frame assembly 1, a rear wheelhouse connecting plate 2, and two rear wheelhouse assemblies 3. The floor frame assembly 1 includes two floor longitudinal beams 11 and at least two cross beams 12. During installation, the two floor longitudinal beams 11 are positioned opposite each other in the left-right direction of the vehicle, and the at least two cross beams 12 are spaced apart between the two floor longitudinal beams 11 in the front-to-back direction of the vehicle. The two rear wheelhouse assemblies 3 are symmetrically positioned on either side of the floor frame assembly 1. Each rear wheelhouse assembly 3 includes a rear wheelhouse body 31 and at least two rear wheelhouse reinforcement plates 32. During installation, the two rear wheelhouse bodies 31 are respectively positioned on the two floor longitudinal beams 11, and the at least two rear wheelhouse reinforcement plates 32 are spaced apart on each rear wheelhouse body 31 in the front-to-back direction of the vehicle. There are at least two rear wheelhouse connecting plates 2. Each rear wheelhouse reinforcement plate 32 overlaps the first end of a rear wheelhouse connecting plate 2, and the second end of each rear wheelhouse connecting plate 2 overlaps the crossbeam 12. This arrangement connects the floor frame assembly 1 and the rear wheelhouse assembly 3 via the rear wheelhouse connecting plates 2, simplifying the welding and assembly process between the rear wheelhouse assembly 3 and the floor frame assembly 1. The overall welding layers do not need to avoid each other, and there is no need to cut through holes, which improves the overall stiffness and durability performance while also ensuring the strength of the overall weld points. In this example, a force transmission channel is formed between the rear wheelhouse reinforcement plate 32, the rear wheelhouse connecting plate 2, and the crossbeam 12 to which they overlap, which can achieve a thorough integration of the entire rear body structure, making the force transmission path of the entire rear body structure more coherent and tightly integrated, significantly improving the vehicle's bending and torsional stiffness, durability, reliability, and NVH performance.

[0046] In one embodiment, referring to Figure 1 and Figure 2 The rear wheel housing connecting plate 2 includes a first rear wheel housing connecting plate 21 and a second rear wheel housing connecting plate 22. The rear wheel housing reinforcement plate 32 of each rear wheel housing assembly 3 includes a first rear wheel housing reinforcement plate 321 and a second rear wheel housing reinforcement plate 322. The cross beam 12 includes a first cross beam 121 and a second cross beam 122. Each first rear wheel housing reinforcement plate 321 overlaps with a first end of a first rear wheel housing connecting plate 21, and the second end of each first rear wheel housing connecting plate 21 overlaps with a first end of the first cross beam 121, so that the two A first force transmission channel is formed between the first rear wheel cover reinforcement plate 321, the two first rear wheel cover connecting plates 21 and the first cross beam 121 overlapped therewith; each second rear wheel cover reinforcement plate 322 is overlapped with the first end of a second rear wheel cover connecting plate 22, and the second end of each second rear wheel cover connecting plate 22 is overlapped with one end of the second cross beam 122, so as to form a second force transmission channel between the two second rear wheel cover reinforcement plates 322, the two second rear wheel cover connecting plates 22 and the second cross beam 122 overlapped therewith.

[0047] As an example, the rear wheelhouse connecting plate 2 includes a first rear wheelhouse connecting plate 21 and a second rear wheelhouse connecting plate 22, the rear wheelhouse reinforcement plate 32 of each rear wheelhouse assembly 3 includes a first rear wheelhouse reinforcement plate 321 and a second rear wheelhouse reinforcement plate 322, and the crossbeam 12 includes a first crossbeam 121 and a second crossbeam 122. During installation, each first rear wheelhouse reinforcement plate 321 is overlapped with the first end of a first rear wheelhouse connecting plate 21, and the second end of each first rear wheelhouse connecting plate 21 is overlapped with one end of the first crossbeam 121, so that a first force transmission channel is formed between the two first rear wheelhouse reinforcement plates 321, the two first rear wheelhouse connecting plates 21 and the first crossbeam 121 overlapped therewith, that is, an H-shaped channel is formed; each second rear wheelhouse reinforcement plate 322 is overlapped with the first end of a second rear wheelhouse connecting plate 22, and the second end of each second rear wheelhouse connecting plate 22 is overlapped with the second crossbeam One end of 122 is overlapped to form a second force transmission channel between the two second rear wheel cover reinforcement plates 322, the two second rear wheel cover connecting plates 22 and the second cross beam 122 overlapped therewith, that is, another H-shaped channel is formed; with this arrangement, the floor frame assembly 1, the rear wheel cover connecting plate 2 and the rear wheel cover reinforcement plate 32 form an H-shaped double-channel annular force transmission structure, which can realize the integration of the entire rear body structure, making the force transmission path of the entire rear body structure more coherent and tightly integrated, thereby greatly improving the bending and torsional stiffness, durability reliability and NVH performance of the vehicle.

[0048] In one embodiment, referring to Figure 2 、 Figure 9 and Figure 10 The rear body structure also includes two rear side inner panels 6; the two rear side inner panels 6 are respectively connected to the two ends of the first force transmission channel, and the two rear side inner panels 6 are respectively connected to the two ends of the second force transmission channel.

[0049] As an example, the rear body structure also includes two rear side inner panels 6. During installation, the two rear side inner panels 6 are respectively connected to the two ends of the first force transmission channel, and the two rear side inner panels 6 are respectively connected to the two ends of the second force transmission channel. Specifically, the two rear side inner panels 6 are respectively connected to the two first rear wheel cover reinforcement panels 321, and the two rear side inner panels 6 are respectively connected to the two second rear wheel cover reinforcement panels 322. In this way, the first force transmission channel and the second force transmission channel can be connected through the rear side inner panels 6, further realizing the integration of the entire rear body structure, making the force transmission path of the entire rear body structure more coherent and tightly integrated, greatly improving the bending and torsional stiffness, durability reliability and NVH performance of the vehicle.

[0050] In one embodiment, referring to Figure 2 、 Figure 9 and Figure 10The rear body structure also includes two rear side inner panel reinforcement plates 9 and two rear side inner panel connecting plates 10; the first end of each rear side inner panel reinforcement plate 9 is connected to the first force transmission channel, and the second end of each rear side inner panel reinforcement plate 9 is connected to the rear side inner panel 6; the first end of each rear side inner panel connecting plate 10 is connected to the second force transmission channel, and the second end of each rear side inner panel connecting plate 10 is connected to the rear side inner panel 6.

[0051] As an example, the rear vehicle body structure also includes two rear side panel reinforcement plates 9 and two rear side panel connection plates 10; during installation, the first end of each rear side panel reinforcement plate 9 is connected to the second rear wheel cover reinforcement plate 322 of the first force transmission channel, and the second end of each rear side panel reinforcement plate 9 is connected to the rear side panel 6; the first end of each rear side panel connection plate 10 is connected to the first rear wheel cover reinforcement plate 321 in the second force transmission channel, and the second end of each rear side panel connection plate 10 is connected to the rear side panel 6; in this way, the first crossbeam 121 of the floor frame assembly 1 and the two first rear wheel cover connection plates 21 , two first rear wheel cover reinforcement plates 321, two rear side inner panel reinforcement plates 9 and rear side inner panel 6 form a force transmission structure; the second crossbeam 122 of the floor frame assembly 1, two second rear wheel cover connecting plates 22, two second rear wheel cover reinforcement plates 322, two rear side inner panel connecting plates 10 and rear side inner panel 6 form a force transmission structure; the two force transmission structures cooperate to form an H-shaped double-channel annular force transmission structure, which optimizes the rear body structure, greatly improves the vehicle's bending and torsional stiffness, bending and torsional modal performance, NVH performance, rear seat ride comfort performance and vehicle durability and reliability, greatly reducing the market complaint rate and vehicle maintenance costs.

[0052] In one embodiment, referring to Figure 9 and Figure 10 The rear body structure also includes a roof rear cross beam 8 and two D-pillar assemblies 7; the two D-pillar assemblies 7 are respectively connected to the two rear side inner panels 6; the two ends of the roof rear cross beam 8 are respectively connected to the two D-pillar assemblies 7.

[0053] As an example, the rear vehicle body structure also includes a roof rear cross member 8 and two D-pillar assemblies 7. During installation, the two D-pillar assemblies 7 are respectively connected to the two rear side panel inner panels 6. Specifically, the D-pillar assemblies 7 include a D-pillar inner reinforcement plate 71 and a D-pillar outer reinforcement plate 72. One end of the D-pillar inner reinforcement plate 71 is connected to the rear side panel inner panel reinforcement plate 9, and the other end of the D-pillar inner reinforcement plate 71 is connected to the D-pillar outer reinforcement plate 72. One end of the D-pillar outer reinforcement plate 72 is connected to the rear side panel inner panel 6, and the other end of the D-pillar outer reinforcement plate 72 is used to connect to the trunk frame. This facilitates the transmission of force from the front to the rear to the trunk frame, expands the force transmission path range, and improves the force transmission effect. Connecting the two ends of the roof rear cross member 8 to the two D-pillar assemblies 7 respectively connects the structures of the rear vehicle body structure that are arranged opposite each other along the left and right directions of the vehicle, thereby transmitting collision forces and improving the supporting strength of the rear vehicle body structure.

[0054] In one embodiment, referring to Figure 1 、 Figure 2 、 Figure 4 、 Figure 9 and Figure 10 The cross beam 12 also includes a third cross beam 123; the rear vehicle body structure also includes two rear side reinforcement plates 4; the first end of each rear side reinforcement plate 4 overlaps a floor longitudinal beam 11 and is aligned with the third cross beam 123, so that the two rear side reinforcement plates 4, the two floor longitudinal beams 11 and the third cross beam 123 overlapped therewith form a third force transmission channel.

[0055] As an example, the cross beam 12 also includes a third cross beam 123, which is arranged between the two floor longitudinal beams 11; the first cross beam 121, the second cross beam 122 and the third cross beam 123 are arranged at intervals along the front and rear directions of the vehicle, specifically, the second cross beam 122 is located in the middle, the third cross beam 123 is located in front of the second cross beam 122, and the first cross beam 121 is located behind the second cross beam 122, which can improve the connectivity between the two floor longitudinal beams 11 and further increase the supporting strength of the floor frame assembly 1. The rear body structure also includes two rear side reinforcement plates 4; the first end of each rear side reinforcement plate 4 overlaps a floor longitudinal beam 11 and is aligned with the third cross beam 123, so that the two rear side reinforcement plates 4, the two floor longitudinal beams 11 and the third cross beam 123 overlapped therewith form a third force transmission channel, and each rear side reinforcement plate 4 is also overlapped with a rear side inner panel connecting plate 10; with this arrangement, the third force transmission channel cooperates with the second force transmission channel and the first force transmission channel to form a double H-type three-channel annular force transmission structure, so that the rear body structure is optimized, and the vehicle's bending and torsional stiffness, bending and torsional modal performance, NVH performance, rear seat ride comfort performance and vehicle durability and reliability are greatly improved, greatly reducing the market complaint rate and vehicle maintenance costs.

[0056] In one embodiment, referring to Figure 1 、 Figure 2 and Figure 4 The rear vehicle body structure also includes a floor panel 5, which is arranged on the floor frame assembly 1; the floor frame assembly 1 also includes a floor reinforcement 13, which is provided on at least one cross beam 12 and / or at least one floor longitudinal beam 11 of the floor frame assembly 1.

[0057] As an example, the rear vehicle body structure further includes a floor panel 5 , which is arranged on the floor longitudinal beams 11 and the cross beams 12 of the floor frame assembly 1 , thereby ensuring that the overall structure of the floor frame assembly 1 is more stable and has better supporting strength.

[0058] As an example, the floor frame assembly 1 also includes a floor reinforcement 13. During design, floor reinforcement 13 is provided on at least one cross member 12 and / or at least one floor longitudinal member 11 of the floor frame assembly 1 to increase local stiffness and strength. For example, cross member 12 is used to mount seats, and floor reinforcement 13 is provided on cross member 12 to enhance seat mounting strength and improve seat comfort. Floor longitudinal member 11 is used to mount the rear overhang, and floor reinforcement 13 is provided on floor longitudinal member 11 to enhance rear overhang mounting point strength and improve vehicle body load-bearing strength.

[0059] Reference Figure 1 and Figure 5 As shown in the AA section of the vehicle, the ends of the second cross member 122 in the cross member 12 correspond to the first rear wheelhouse reinforcement plates 321 in the two rear wheelhouse assemblies 3. This creates a continuous cavity structure enclosed by the first rear wheelhouse reinforcement plates 321, the second cross member 122, and the floor panel 5. Compared to conventional structures, this cavity structure is not interrupted by the intersection of the second cross member 122 and the floor longitudinal member 11. This significantly improves joint stiffness, thereby enhancing the overall stiffness and durability of the rear body structure. Simultaneously, the first rear wheelhouse connecting plate 21 overlaps this continuous cavity structure to form a triangular cavity structure in the Y direction, significantly improving the torsional resistance of the rear body structure. The AA section structure also forms the first continuous force transmission path between the upper and lower bodies.

[0060] Reference Figure 1 and Figure 6As shown in the BB section: the two ends of the first crossbeam 121 in the crossbeam 12 are respectively arranged to correspond to the second rear wheel cover reinforcement plates 322 in the two rear wheel cover assemblies 3, so that the continuous cavity structure surrounded by the second rear wheel cover reinforcement plate 322, the first crossbeam 121 and the floor panel 5 is also greatly improved in joint stiffness because its joints are continuous and not interrupted. At the same time, a second continuous cavity is formed on the upper side with the second rear wheel cover connecting plate 22, and a third continuous cavity is formed on the left side with the rear spring tower seat bracket 33. These continuous cavity structures not only ensure the joint stiffness of the rear body structure, greatly improve the bending and torsional stiffness, durability and reliability and NVH performance of the vehicle, but also can effectively transmit the chassis impact load; at the same time, the BB section structure forms a second force transmission path that is continuous between the upper and lower bodies.

[0061] Reference Figure 7 As shown in the CC section: the closed cavity structure formed by the one-piece rear wheel cover main body 31, the rear wheel cover reinforcement plate 32, and the rear spring tower seat bracket 33 are welded in pairs. The welding level is simple, which can ensure that the entire rear wheel cover area is evenly and effectively transmitted from bottom to top, and the structural stiffness gradient is uniform, which greatly reduces the risk of cracking of sheet metal and welds.

[0062] Reference Figure 8 As shown in the DD section of the figure, the integrated thermoformed floor frame assembly 1 has a coherent overall frame structure and good joint stiffness, which greatly improves the durability and reliability of the entire vehicle. At the same time, the integrated structural design is relatively flexible, and reinforcement plates can be flexibly added to improve local stiffness and strength.

[0063] In one embodiment, referring to Figure 1 、 Figure 2 、 Figure 4 、 Figure 9 and Figure 10 The floor frame assembly 1 and the rear wheel cover assembly 3 are both integrally formed structures.

[0064] As an example, the floor frame assembly 1 is an integrally molded structure. The cross member 12 also includes a fourth cross member 124, which is disposed between the two floor longitudinal beams 11. The first cross member 121, the second cross member 122, the third cross member 123, and the fourth cross member 124 are spaced apart along the vehicle's fore-aft direction, thereby improving connectivity between the two floor longitudinal beams 11 and further increasing the supporting strength of the floor frame assembly 1. Specifically, the floor longitudinal beams 11, the first cross member 121, the second cross member 122, the third cross member 123, and the fourth cross member 124 are integrally molded, reducing the number of parts and welds, improving integration, and significantly reducing mold costs, as well as process costs such as welding and assembly. The rear wheel cover assembly 3 is an integrally formed structure, specifically the rear wheel cover main body 31 and the rear wheel cover reinforcement plate 32 are integrally formed, specifically using one-piece hot forming, which can reduce the number of parts and the number of spot welds, and improve the integration; it can not only transmit the chassis impact load, but also due to the high integration, the number of welding points is small, the welding level is simple, and the welding strength and durability reliability are greatly improved.

[0065] In one embodiment, referring to Figure 2 、 Figure 4 、 Figure 9 and Figure 10 The first cross-member 121, the second cross-member 122, the third cross-member 123, and the fourth cross-member 124 are sequentially spaced apart along the vehicle's fore-and-aft direction, forming four transverse force transmission paths and improving force transmission efficiency. The first and second cross-members 121, 122 are positioned at a higher height than the third and fourth cross-members 123, 124. The lengths of the first and second cross-members 121, 122 are shorter than the lengths of the third and fourth cross-members 123, 124. This ensures that the floor frame assembly 1 meets vehicle design requirements.

[0066] In one embodiment, referring to Figure 1 and Figure 2 The rear wheel cover assembly 3 also includes a rear spring tower seat bracket 33; the rear spring tower seat bracket 33 is arranged on the side of the rear wheel cover body 31 away from the rear wheel cover connecting plate 2; the rear spring tower seat bracket 33 is corresponding to a rear wheel cover reinforcement plate 32.

[0067] As an example, the rear wheel cover assembly 3 also includes a rear spring tower support 33; the rear spring tower support 33 is arranged on the rear wheel cover main body 31 away from the rear wheel cover connecting plate 2, and the rear spring tower support 33 is arranged corresponding to a rear wheel cover reinforcement plate 32, which can withstand the chassis impact load, thereby improving the strength of the rear wheel cover assembly 3.

[0068] An embodiment of the utility model provides an automobile, comprising a rear body structure.

[0069] As an example, a vehicle includes a rear body structure comprising a floor frame assembly 1, a rear wheelhouse connecting plate 2, and two rear wheelhouse assemblies 3. The floor frame assembly 1 includes two floor longitudinal beams 11 and at least two cross beams 12. During installation, the two floor longitudinal beams 11 are positioned opposite each other in the left-right direction of the vehicle, and the at least two cross beams 12 are spaced apart between the two floor longitudinal beams 11 in the front-to-back direction of the vehicle. The two rear wheelhouse assemblies 3 are symmetrically positioned on either side of the floor frame assembly 1. Each rear wheelhouse assembly 3 includes a rear wheelhouse body 31 and at least two rear wheelhouse reinforcement plates 32. During installation, the two rear wheelhouse bodies 31 are respectively positioned on the two floor longitudinal beams 11, and the at least two rear wheelhouse reinforcement plates 32 are spaced apart on each rear wheelhouse body 31 in the front-to-back direction of the vehicle. There are at least two rear wheelhouse connecting plates 2. Each rear wheelhouse reinforcement plate 32 overlaps the first end of a rear wheelhouse connecting plate 2, and the second end of each rear wheelhouse connecting plate 2 overlaps the crossbeam 12. This arrangement connects the floor frame assembly 1 and the rear wheelhouse assembly 3 via the rear wheelhouse connecting plates 2, simplifying the welding and assembly process between the rear wheelhouse assembly 3 and the floor frame assembly 1. The overall welding layers do not need to avoid each other, and there is no need to cut through holes, which improves the overall stiffness and durability performance while also ensuring the strength of the overall weld points. In this example, a force transmission channel is formed between the rear wheelhouse reinforcement plate 32, the rear wheelhouse connecting plate 2, and the crossbeam 12 to which they overlap, which can achieve a thorough integration of the entire rear body structure, making the force transmission path of the entire rear body structure more coherent and tightly integrated, significantly improving the vehicle's bending and torsional stiffness, durability, reliability, and NVH performance.

[0070] In this example, the integrally formed floor frame assembly 1 can be stamped from sheet metal of variable thickness based on performance requirements; the rear wheel housing body 31 and rear wheel housing reinforcement plate 32 in the rear wheel housing assembly 3 can be stamped from sheet metal of variable thickness based on performance requirements. The integrally formed floor frame assembly 1 and the rear wheel housing body 31 and rear wheel housing reinforcement plate 32 in the rear wheel housing assembly 3 can be connected to the rear wheel housing connecting plate 2 by welding, riveting, or screwing. The integrally formed floor frame assembly 1, two rear wheel housing bodies 31, two first rear wheel housing reinforcement plates 321, two second rear wheel housing reinforcement plates 322, two first rear wheel housing connecting plates 21, two second rear wheel housing connecting plates 22, two rear side panel reinforcement plates 4, two rear side panel inner panels 6, two rear side panel inner panel reinforcement plates 9, two rear side panel inner panel connecting plates 10, the D-pillar assembly 7, and the roof rear cross member 8 form a ring structure. Among them, the upper end of the first rear wheel cover connecting plate 21 is overlapped and aligned with the first rear wheel cover reinforcement plate 321, and the lower end is overlapped and aligned with the first cross beam 121; the upper end of the second rear wheel cover connecting plate 22 is overlapped and aligned with the second rear wheel cover reinforcement plate 322, and the lower end is overlapped and aligned with the second cross beam 122; the third cross beam 123 is overlapped and aligned with the rear side reinforcement plate 4 through the floor longitudinal beam 11; thereby forming a double H-shaped three-channel annular force transmission structure for the entire rear body, integrating the entire rear body, making the force transmission path of the entire rear body more coherent and tightly combined, greatly improving the vehicle's bending and torsional stiffness, durability and reliability, and NVH performance; the rear-seat ride comfort performance and the durability and reliability of the vehicle are greatly improved, greatly reducing the market complaint rate and vehicle maintenance costs; at the same time, the structure is relatively flexible and suitable for platform-based multi-model structures, with high feasibility and great market potential.

[0071] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A rear vehicle body structure, characterized in that: It includes a floor frame assembly, a rear wheel cover connecting plate and two rear wheel cover assemblies symmetrically arranged on both sides of the floor frame assembly; The floor frame assembly includes two floor longitudinal beams and at least two cross beams arranged between the two floor longitudinal beams; Each of the rear wheel cover assemblies includes a rear wheel cover body and at least two rear wheel cover reinforcement plates spaced apart from each other on the rear wheel cover body; There are at least two rear wheel cover connecting plates, each of the rear wheel cover reinforcement plates is overlapped with the first end of a rear wheel cover connecting plate, and the second end of each rear wheel cover connecting plate is overlapped with the cross beam, so that a force transmission channel is formed between the rear wheel cover reinforcement plate, the rear wheel cover connecting plate and the cross beam they are overlapped with.

2. The rear vehicle body structure according to claim 1, wherein: The rear wheel cover connecting plate includes a first rear wheel cover connecting plate and a second rear wheel cover connecting plate, the rear wheel cover reinforcement plate of each rear wheel cover assembly includes a first rear wheel cover reinforcement plate and a second rear wheel cover reinforcement plate spaced apart and arranged on the rear wheel cover body, and the cross beam includes a first cross beam and a second cross beam; Each of the first rear wheelhouse reinforcement plates overlaps a first end of a first rear wheelhouse connecting plate, and a second end of each of the first rear wheelhouse connecting plates overlaps one end of the first crossbeam, so that a first force transmission channel is formed between the two first rear wheelhouse reinforcement plates, the two first rear wheelhouse connecting plates, and the overlapped first crossbeam; Each of the second rear wheel cover reinforcement plates is overlapped with the first end of a second rear wheel cover connecting plate, and the second end of each of the second rear wheel cover connecting plates is overlapped with one end of the second cross beam, so that a second force transmission channel is formed between the two second rear wheel cover reinforcement plates, the two second rear wheel cover connecting plates and the second cross beam they are overlapped with.

3. The rear vehicle body structure according to claim 2, wherein: The rear body structure further includes two rear side inner panels; The two rear side inner panels are respectively connected to the two ends of the first force transmission channel, and the two rear side inner panels are respectively connected to the two ends of the second force transmission channel.

4. The rear vehicle body structure according to claim 3, characterized in that: The rear body structure further includes two rear side inner panel reinforcement plates and two rear side inner panel connecting plates; The first end of each of the rear side panel inner panel reinforcement plates is connected to the first force transmission channel, and the second end of each of the rear side panel inner panel reinforcement plates is connected to one of the rear side panel inner panels; The first end of each of the rear side panel inner panel connecting plates is connected to the second force transmission channel, and the second end of each of the rear side panel inner panel connecting plates is connected to one of the rear side panel inner panels.

5. The rear vehicle body structure according to claim 3, wherein: The rear body structure also includes a roof rear cross member and two D-pillar assemblies; The two D-pillar assemblies are respectively connected to the two rear side wall inner panels; The two ends of the rear cross beam of the top cover are respectively connected to the two D-pillar assemblies.

6. The rear vehicle body structure according to claim 1, wherein: The crossbeam further includes a third crossbeam; The rear body structure also includes two rear side reinforcement panels; The first end of each rear side reinforcement plate overlaps with a floor longitudinal beam and is aligned with the third cross beam, so that a third force transmission channel is formed between the two rear side reinforcement plates, the two floor longitudinal beams and the overlapped third cross beam.

7. The rear vehicle body structure according to claim 1, wherein: The rear vehicle body structure further includes a floor panel, which is disposed on the floor frame assembly; The floor frame assembly further comprises a floor reinforcement member, which is provided on at least one transverse beam and / or at least one floor longitudinal beam of the floor frame assembly.

8. The rear vehicle body structure according to claim 1, wherein: The floor frame assembly and the rear wheel cover assembly are both integrally formed structures.

9. The rear vehicle body structure according to claim 1, wherein: The rear wheel cover assembly also includes a rear spring tower seat bracket; the rear spring tower seat bracket is arranged on the side of the rear wheel cover body away from the rear wheel cover connecting plate; the rear spring tower seat bracket is arranged corresponding to one of the rear wheel cover reinforcement plates.

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

Images