Automobile body rear cabin assembly and automobile

Abstract

The invention discloses an automobile body rear cabin assembly and an automobile, and relates to the technical field of automobile manufacturing, the automobile body rear cabin assembly comprises a first supporting column assembly, a wheel cover assembly, a side longitudinal beam assembly and a cross beam assembly, the first supporting column assembly comprises a supporting column plate extending in the vertical direction, and the wheel cover assembly comprises a wheel cover main body structure and a wheel cover inner plate reinforcing plate; the wheel cover body structure and the wheel cover inner plate reinforcing plate are arranged at intervals in the transverse direction and connected with the lower end of the supporting column plate, the edge longitudinal beam assembly comprises an edge longitudinal beam extending in the longitudinal direction and a chassis fixing plate arranged at one end of the edge longitudinal beam in the transverse direction, and the edge longitudinal beam and the chassis fixing plate are both arranged below the wheel cover body structure. The chassis fixing plate is connected with the wheel cover body structure, the cross beam assembly comprises a cross beam structure extending in the transverse direction and an end plate arranged on the cross beam structure, the cross beam structure is in lap joint with part of the side longitudinal beam, and the end plate is connected with the cross beam structure and the wheel cover inner plate reinforcing plate. Therefore, the mechanical performance, NVH performance and the like of the vehicle body rear cabin assembly and the vehicle body can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and particularly relates to a rear cabin assembly of a vehicle and an automobile. Background Art

[0002] As a part of the basic components of a whole vehicle, the mechanical properties such as the structural strength and stiffness of the vehicle body, and the NVH performance are important indicators for measuring the quality of an automobile. With the continuous improvement of requirements for the safety, comfort, etc. of the whole vehicle, the technical indicators of the whole vehicle have been gradually improved. The existing solutions are lacking in meeting the needs of consumers, improving the performance quality of vehicle models, and enhancing the competitiveness of vehicle models. Summary of the Invention

[0003] The main object of the present invention is to provide a rear cabin assembly of a vehicle and an automobile, optimize the spatial configuration of the rear cabin area of the vehicle body, improve the mechanical properties of the vehicle body, optimize the stiffness and mode of the vehicle body, improve the NVH performance of the vehicle body, and comprehensively improve the safety of the whole vehicle and the comfort of the vehicle occupants.

[0004] To achieve the above object, the rear cabin assembly of the vehicle proposed by the present invention includes:

[0005] A first pillar assembly, including a pillar plate extending in the up-down direction;

[0006] A wheelhouse assembly, including a wheelhouse main structure and a wheelhouse inner panel reinforcement plate. The wheelhouse main structure and the wheelhouse inner panel reinforcement plate are spaced apart in the transverse direction and are both connected to the lower end of the pillar plate;

[0007] A side sill assembly, including a side sill extending in the longitudinal direction and a chassis fixing plate provided at one end of the side sill in the transverse direction. The side sill and the chassis fixing plate are both provided below the wheelhouse main structure, and the chassis fixing plate is connected to the wheelhouse main structure; and,

[0008] A crossbeam assembly, including a crossbeam structure extending in the transverse direction and an end plate provided on the crossbeam structure. The crossbeam structure is partially overlapped and connected with the side sill, and the end plate is connected to the crossbeam structure and the wheelhouse inner panel reinforcement plate;

[0009] Wherein, a first force-bearing node is provided at the position of the chassis fixing plate. The first force-bearing node is connected and supported by the end plate, the wheelhouse inner panel reinforcement plate, the wheelhouse main structure, and the side sill, and is used for fixing a chassis shock absorber. The upper end of the pillar plate forms a second force-bearing node, the end of the crossbeam structure away from the side sill forms a third force-bearing node, and the two ends of the side sill in the longitudinal direction respectively form a fourth force-bearing node and a fifth force-bearing node.

[0010] In one embodiment, the strut plate includes a strut inner plate and a strut outer plate that are laterally spaced apart, and the strut inner plate and the strut outer plate enclose a first reinforcing cavity;

[0011] The wheelhouse main structure includes a wheelhouse inner plate, a wheelhouse outer plate, and a wheelhouse support plate. The wheelhouse outer plate connects the strut inner plate and the strut outer plate. The wheelhouse support plate is disposed below the wheelhouse outer plate to connect the wheelhouse outer plate and the chassis fixing plate. The wheelhouse inner plate is disposed on one lateral side of the wheelhouse outer plate and the wheelhouse support plate and connects the wheelhouse outer plate and the wheelhouse support plate. The wheelhouse inner plate, the wheelhouse outer plate, and the wheelhouse support plate enclose a second reinforcing cavity;

[0012] The wheelhouse inner plate reinforcement plate, the wheelhouse inner plate, the wheelhouse outer plate, the wheelhouse support plate, the chassis fixing plate, and the end plate enclose a third reinforcing cavity.

[0013] In one embodiment, the rear body compartment assembly further includes a floor, and the floor is disposed on one lateral side of the side longitudinal beam and connects to the side longitudinal beam;

[0014] The crossbeam structure includes an upper crossbeam and a lower crossbeam that are vertically spaced apart. The upper crossbeam and the lower crossbeam are respectively disposed on two vertical sides of the floor and are respectively lapped at two vertical ends of the side longitudinal beam;

[0015] The upper crossbeam, the floor, and the side longitudinal beam enclose a fourth reinforcing cavity;

[0016] The lower crossbeam, the floor, and the side longitudinal beam enclose a fifth reinforcing cavity;

[0017] The side longitudinal beam has a cavity extending longitudinally, and the cavity of the side longitudinal beam forms a sixth reinforcing cavity.

[0018] In one embodiment, a first sidewall force-bearing node is formed at the upper end of the strut plate, and a second sidewall force-bearing node is formed in the middle in the vertical direction;

[0019] The rear cabin assembly of the vehicle further includes a second pillar assembly and a longitudinal connection assembly. The second pillar assembly is located on one side of the pillar plate in the longitudinal direction and is inclined upward from bottom to the pillar plate. The upper end of the second pillar assembly is connected to the pillar plate, and the lower end is connected to the side sill. The longitudinal connection assembly is arranged longitudinally between the pillar plate and the second pillar assembly and connects the pillar plate and the second pillar assembly. Third side wall stress nodes and fourth side wall stress nodes are respectively formed at the upper and lower ends of the second pillar assembly in the vertical direction, and a fifth side wall stress node is formed in the middle in the vertical direction. A sixth side wall stress node is formed at the connection between the wheelhouse outer panel and the longitudinal connection assembly, and a seventh side wall stress node is formed at the connection between the wheelhouse outer panel, the second pillar assembly and the longitudinal connection assembly;

[0020] The wheelhouse main structure includes a wheelhouse outer panel. The wheelhouse outer panel is arranged below the longitudinal connection assembly and is connected to the pillar plate, the second pillar assembly and the longitudinal connection assembly. Eighth side wall stress nodes and ninth side wall stress nodes are respectively formed at the longitudinal two ends of the wheelhouse main structure, and a tenth side wall stress node is formed in the middle in the longitudinal direction. An eleventh side wall stress node is formed at the connection between the wheelhouse main structure and the lower end of the pillar plate;

[0021] Wherein, the first side wall stress node is arranged corresponding to the second stress node, and the third side wall stress node is arranged corresponding to the fifth stress node.

[0022] In an embodiment, there are two side sill assemblies. The two side sill assemblies are respectively arranged on the two sides of the crossbeam structure in the transverse direction and are respectively connected to the two ends of the crossbeam structure. First floor stress nodes and second floor stress nodes are formed at the connections between the two side sill assemblies and the crossbeam structure;

[0023] The crossbeam assembly further includes a middle crossbeam, a rear crossbeam and a tail crossbeam. The middle crossbeam and the rear crossbeam are respectively arranged on the two sides of the crossbeam structure in the longitudinal direction. The tail crossbeam is arranged on the side of the rear crossbeam away from the crossbeam structure. The middle crossbeam, the rear crossbeam and the tail crossbeam are all connected to the two side sill assemblies. Third floor stress nodes and fourth floor stress nodes are formed at the connections between the middle crossbeam and the two side sill assemblies. Fifth floor stress nodes and sixth floor stress nodes are formed at the connections between the rear crossbeam and the two side sill assemblies. Seventh floor stress nodes and eighth floor stress nodes are formed at the connections between the tail crossbeam and the two side sill assemblies;

[0024] The rear body compartment assembly further includes a connection assembly, which includes a first connecting plate, a second connecting plate, and a third connecting plate. The first connecting plate connects the middle cross beam and the cross beam structure, and respectively forms a ninth floor stress node and a tenth floor stress node at the corresponding connection points. The second connecting plate connects the rear cross beam and the cross beam structure, and respectively forms an eleventh floor stress node and a twelfth floor stress node at the corresponding connection points. The third connecting plate connects the tail cross beam and the rear cross beam, and respectively forms a thirteenth floor stress node and a fourteenth floor stress node at the corresponding connection points;

[0025] Wherein, the first floor stress node and the second floor stress node are respectively arranged corresponding to the third stress nodes at both ends of the cross beam structure, the third floor stress node and the fourth floor stress node are respectively arranged corresponding to the fourth stress nodes of the two side longitudinal beams, and the seventh floor stress node and the eighth floor stress node are respectively arranged corresponding to the fifth stress nodes of the two side longitudinal beams.

[0026] In an embodiment, the cross beam assembly further includes a roof cross beam, which extends horizontally. There are two end plates, and the two end plates are spaced apart horizontally;

[0027] There are two first pillar assemblies and two wheel well assemblies. The two first pillar assemblies and the two wheel well assemblies are respectively arranged on both sides of the cross beam structure in the horizontal direction. The two first pillar assemblies respectively connect the two ends of the roof cross beam in the horizontal direction. The two wheel well inner panel reinforcement plates respectively connect the two end plates. The roof cross beam, the cross beam structure, the two end plates, the two first pillar assemblies, the two wheel well assemblies, and the two side longitudinal beam assemblies enclose and form a first strengthening ring.

[0028] In an embodiment, the rear body compartment assembly further includes two second pillar assemblies. The two second pillar assemblies are both located on one side of the pillar plate in the longitudinal direction and are spaced apart horizontally. The two second pillar assemblies both extend in the up and down direction;

[0029] The cross beam assembly further includes a tail cross beam and a rear top cross beam. The tail cross beam and the rear top cross beam both extend horizontally. The tail cross beam is located on one side of the cross beam structure in the longitudinal direction, and the two lower ends of the two second pillar assemblies are respectively connected to the two ends of the tail cross beam in the horizontal direction. The rear top cross beam is arranged above the tail cross beam, and the two upper ends of the two second pillar assemblies are respectively connected to the two ends of the rear top cross beam in the horizontal direction.

[0030] In an embodiment, each of the second pillar assemblies is provided with a cavity structure, and the cavity of the second pillar assembly forms a seventh strengthening cavity.

[0031] In one embodiment, the tail crossbeam has a cavity extending transversely, and the cavity of the tail crossbeam forms an eighth reinforcing cavity; and / or,

[0032] The rear top crossbeam has a cavity extending transversely, and the cavity of the rear top crossbeam forms a ninth reinforcing cavity.

[0033] The present invention also provides an automobile, including the above-mentioned vehicle rear compartment assembly.

[0034] In the technical solution of the present invention, a first stress node is provided at the position of the chassis fixing plate. The first stress node is connected and supported by the end plate, the inner reinforcing plate of the wheel housing, the main structure of the wheel housing, and the side longitudinal beam, and is used to fix the chassis shock absorber. The upper end of the pillar plate forms a second stress node, and one end of the crossbeam structure away from the side longitudinal beam forms a third stress node. The two longitudinal ends of the side longitudinal beam respectively form a fourth stress node and a fifth stress node. At this time, the first stress node and the second stress node form a first stress path, the first stress node and the third stress node form a second stress path, the first stress node and the fourth stress node form a third stress path, and the first stress node and the fifth stress node form a fourth stress path. Also, because the first stress node is used to fix the chassis shock absorber, when the first stress node is subjected to an external excitation, under the combined action of the stress node and the stress path, the external force received at the installation point can be effectively and stably dispersed, which is beneficial to improving the dynamic stiffness of the installation point, improving the vehicle body NVH performance, improving the comfort of vehicle occupants, and enhancing the competitiveness of the vehicle model. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0036] Figure 1 It is a schematic structural diagram of an embodiment (one direction) of the vehicle rear compartment assembly provided by the present invention;

[0037] Figure 2 It is Figure 1 a schematic structural diagram of the vehicle rear compartment assembly (another direction) in the middle vehicle;

[0038] Figure 3 It is Figure 1 a schematic diagram of the stress nodes and stress areas of the vehicle rear compartment assembly (one direction) in the middle vehicle;

[0039] Figure 4 For Figure 1 Schematic diagram of force-bearing nodes and force-bearing areas of the rear cabin assembly of the vehicle body (in another direction);

[0040] Figure 5 For Figure 1 Schematic diagram of force-bearing nodes and force-bearing areas of the rear cabin assembly of the vehicle body (in yet another direction);

[0041] Figure 6 For Figure 5 Schematic diagram of the cross-section of M1 - M2 in the vehicle;

[0042] Figure 7 For Figure 6 Schematic diagram of the cross-section of M1 - M4 in the vehicle;

[0043] Figure 8 For Figure 6 Schematic diagram of the cross-section of M3 - M2 in the vehicle;

[0044] Figure 9 For Figure 5 Schematic diagram of the cross-section of N1 - N2 in the vehicle;

[0045] Figure 10 For Figure 9 Schematic diagram of the cross-section of N3 - N4 in the vehicle;

[0046] Figure 11 For Figure 9 Schematic diagram of the cross-section of N4 - N2 in the vehicle;

[0047] Figure 12 For Figure 1 Schematic diagram of the sidewall force-bearing nodes of the rear cabin assembly of the vehicle body;

[0048] Figure 13 For Figure 1 Schematic diagram of the floor force-bearing nodes of the rear cabin assembly of the vehicle body;

[0049] Figure 14 For Figure 1 Schematic diagram of the structure of the first reinforcing ring in the vehicle;

[0050] Figure 15 For Figure 1 Schematic diagram of the structure of the second reinforcing ring in the vehicle;

[0051] Figure 16 For Figure 15 Schematic diagram of the cross-section of the second reinforcing ring along the transverse direction in the vehicle;

[0052] Figure 17 For Figure 15 Schematic diagram of the cross-section of the second reinforcing ring along the vertical direction in the vehicle.

[0053] Explanation of the reference numerals in the attached drawings:

[0054] 100, Rear cabin assembly of vehicle body; 1, First pillar assembly; 11, Pillar plate; 111, Inner pillar plate; 112, Outer pillar plate; 12, First strengthening cavity; 2, Wheelhouse assembly; 21, Main structure of wheelhouse; 211, Inner wheelhouse plate; 212, Outer wheelhouse plate; 213, Wheelhouse support plate; 22, Reinforcement plate for inner wheelhouse plate; 23, Second strengthening cavity; 24, Third strengthening cavity; 3, Side longitudinal beam assembly; 31, Side longitudinal beam; 32, Chassis fixing plate; 33, Sixth strengthening cavity; 4, Crossbeam assembly; 41, Crossbeam structure; 411, Upper crossbeam; 412, Lower crossbeam; 42, End plate; 43, Fourth strengthening cavity; 44, Fifth strengthening cavity; 45, Middle crossbeam; 46, Rear crossbeam; 47, Tail crossbeam; 471, Eighth strengthening cavity; 48, Roof crossbeam; 49, Rear roof crossbeam; 491, Ninth strengthening cavity; 5, Floor; 6, Second pillar assembly; 61, Seventh strengthening cavity; 7, Longitudinal connection assembly; 8, Connection assembly; 81, First connecting plate; 82, Second connecting plate; 83, Third connecting plate.

[0055] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0056] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0057] It should be noted that if there are directional indications (such as up, down, left, right, front, rear...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0058] In addition, if the embodiments of the present invention involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] The present invention provides a rear body compartment assembly and an automobile, which optimize the spatial configuration of the rear body compartment area, improve the mechanical properties of the vehicle body, optimize the body stiffness and mode, improve the body NVH performance, and comprehensively improve the overall vehicle safety and the comfort of the vehicle occupants.

[0060] Please refer to Figure 1-4 , in an embodiment of the present invention, the rear body compartment assembly 100 includes a first pillar assembly 1, a wheelhouse assembly 2, a side sill assembly 3, and a crossbeam assembly 4. The first pillar assembly 1 includes a pillar plate 11 extending in the up-down direction. The wheelhouse assembly 2 includes a wheelhouse main structure 21 and a wheelhouse inner panel reinforcement plate 22. The wheelhouse main structure 21 and the wheelhouse inner panel reinforcement plate 22 are spaced apart in the transverse direction and are both connected to the lower end of the pillar plate. The side sill assembly 3 includes a side sill 31 extending in the longitudinal direction and a chassis fixing plate 32 provided at one end of the side sill in the transverse direction. The side sill 31 and the chassis fixing plate 32 are both provided below the wheelhouse main structure 21. The chassis fixing plate 32 is connected to the wheelhouse main structure 21. The crossbeam assembly 4 includes a crossbeam structure 41 extending in the transverse direction and an end plate 42 provided on the crossbeam structure 41. The crossbeam structure 41 is partially overlapped and connected to the side sill. The end plate 42 is connected to the crossbeam structure 41 and the wheelhouse inner panel reinforcement plate 22. Wherein, a first force-bearing node is provided at the position of the chassis fixing plate 32. The first force-bearing node is connected and supported by the end plate 42, the wheelhouse inner panel reinforcement plate 22, the wheelhouse main structure 21, and the side sill 31, and is used to fix the chassis shock absorber. The upper end of the pillar plate 11 forms a second force-bearing node. The end of the crossbeam structure 41 away from the side sill forms a third force-bearing node. The two ends of the side sill in the longitudinal direction respectively form a fourth force-bearing node and a fifth force-bearing node.

[0061] In the technical solution of the present invention, a first force-bearing node is provided at the position of the chassis fixing plate 32. The first force-bearing node is connected and supported by the end plate 42, the inner wheelhouse reinforcement plate 22, the wheelhouse main structure 21, and the side longitudinal beam 31, and is used to fix the chassis shock absorber. The upper end of the pillar plate 11 forms a second force-bearing node, and one end of the crossbeam structure 41 away from the side longitudinal beam forms a third force-bearing node. The two longitudinal ends of the side longitudinal beam respectively form a fourth force-bearing node and a fifth force-bearing node. At this time, the first force-bearing node O and the second force-bearing node A form a first force path OA, the first force-bearing node O and the third force-bearing node B form a second force path OB, the first force-bearing node O and the fourth force-bearing node C form a third force path OC, and the first force-bearing node O and the fifth force-bearing node D form a fourth force path OD. Also, since the first force-bearing node O is used to fix the chassis shock absorber, when the first force-bearing node O is subjected to an external excitation, under the combined action of the force-bearing nodes and the force paths, the external force received at the installation point can be effectively and stably dispersed, which is beneficial to improving the dynamic stiffness of the installation point, improving the vehicle body NVH performance, improving the comfort of vehicle occupants, and enhancing the competitiveness of the vehicle model.

[0062] Please refer to Figure 3-4 , in the present invention, the first force-bearing node is O, the second force-bearing node is A, the third force-bearing node is B, the fourth force-bearing node is C, and the fifth force-bearing node is D.

[0063] It can be understood that in the present invention, the first force path OA extends in the up-and-down direction to transfer the external force received at the first force-bearing node O in the up-and-down direction; the second force path OB extends in the transverse direction to transfer the external force received at the first force-bearing node O in the transverse direction; the third force path OC and the fourth force path OD extend in the longitudinal direction, and the fourth force-bearing node C and the fifth force-bearing node D are respectively arranged on the opposite sides of the first force-bearing node O in the longitudinal direction. The external force received at the first force-bearing node O can be transferred in the longitudinal direction and to the opposite sides; under the combined action of the force-bearing nodes and the force paths, the external force received at the force-bearing node is gradually and sequentially dispersed and transferred, which is beneficial to improving the performance such as the dynamic stiffness at the first force-bearing node O, improving the vehicle body mechanics and NVH performance, and improving the comfort of vehicle occupants.

[0064] It should be noted that in a further embodiment of the present invention, the second force-bearing node A, the fourth force-bearing node C, and the fifth force-bearing node D form an ACD spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100; the first force-bearing node O, the second force-bearing node A, and the fifth force-bearing node D form an AOD spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100; the first force-bearing node O, the second force-bearing node A, and the fourth force-bearing node C form an AOC spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100; the third force-bearing node B, the fourth force-bearing node C, and the fifth force-bearing node D form a BCD spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100; the first force-bearing node O, the third force-bearing node B, and the fourth force-bearing node C form a BOC spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100; the first force-bearing node O, the third force-bearing node B, and the fifth force-bearing node D form a BOD spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100; the second force-bearing node A, the third force-bearing node B, the fourth force-bearing node C, and the fifth force-bearing node D form an ACBD spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100. With such an arrangement, each of the spatial force-bearing regions can optimize the force-bearing configuration of the vehicle rear cabin assembly 100 in the corresponding region. At the same time, the layout and design of multiple spatial force-bearing regions can further improve the mechanical properties of the vehicle rear cabin assembly 100, enhance the overall structural strength of the vehicle rear cabin assembly 100, optimize the stiffness and modal of the vehicle rear cabin assembly 100, and improve the NVH performance of the whole vehicle.

[0065] It should also be noted that in another embodiment of the present invention, the first force-bearing node O, the second force-bearing node A, and the third force-bearing node B form an AOB spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100; the second force-bearing node A, the third force-bearing node B, and the fourth force-bearing node C form an ABC spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100; the second force-bearing node A, the third force-bearing node B, and the fifth force-bearing node D form an ABD spatial force-bearing region within the macroscopic spatial layout region of the vehicle rear cabin assembly 100. Further setting multiple spatial force-bearing regions can effectively and stably disperse the external forces received by the vehicle rear cabin assembly 100, further enhance the overall structural strength of the vehicle rear cabin assembly 100, improve the body NVH performance, and improve the competitiveness of the vehicle model.

[0066] In addition, the unique cross-section layout design, effective cross-section structural features, and novel cross-section lap matching relationship are one of the significant innovation points of the present invention. Through the cross-section structure, the spatial configuration inside the rear body compartment assembly 100 described in the present invention can be more clearly shown. Please refer to Figure 5-11 , in an embodiment of the present invention, the pillar plate 11 includes a pillar inner plate 111 and a pillar outer plate 112 that are spaced apart in the transverse direction. The pillar inner plate 111 and the pillar outer plate 112 enclose a first strengthening cavity 12. The wheelhouse main body structure 21 includes a wheelhouse inner plate 211, a wheelhouse outer plate 212, and a wheelhouse support plate 213. The wheelhouse outer plate 212 connects the pillar inner plate 111 and the pillar outer plate 112. The wheelhouse support plate 213 is disposed below the wheelhouse outer plate 212 to connect the wheelhouse outer plate 212 and the chassis fixing plate 32. The wheelhouse inner plate 211 is disposed on one side of the wheelhouse outer plate 212 and the wheelhouse support plate 213 in the transverse direction and connects the wheelhouse outer plate 212 and the wheelhouse support plate 213. The wheelhouse inner plate 211, the wheelhouse outer plate 212, and the wheelhouse support plate 213 enclose a second strengthening cavity 23. The wheelhouse inner plate reinforcement plate 22, the wheelhouse inner plate 211, the wheelhouse outer plate 212, the wheelhouse support plate 213, the chassis fixing plate 32, and the end plate 42 enclose a third strengthening cavity 24.

[0067] In this embodiment, the third strengthening cavity 24 is disposed close to the first force application node O. Thus, when the first force application node O is excited, the third strengthening cavity 24 transfers the node force along the cavity to the second strengthening cavity 23 and the first strengthening cavity 12. The first strengthening cavity 12, the second strengthening cavity 23, and the third strengthening cavity 24 are spaced apart in the vertical and transverse directions, and the cavity extends longitudinally. The arrangement and design of the multiple force-bearing cavities form a unique spatial configuration. Therefore, the settings of the first strengthening cavity 12, the second strengthening cavity 23, and the third strengthening cavity 24 are beneficial to the multi-directional transfer and uniform distribution of the force along the cavity, enabling the force to be effectively diffused step by step in sequence, improving the mechanical properties of the rear body compartment assembly 100 and the vehicle body, improving the stiffness and modal properties, improving the NVH performance, and improving the comfort of the vehicle occupants.

[0068] Similarly, to further optimize the comprehensive mechanical and NVH performance of the rear body compartment assembly 100 in all directions, in another embodiment of the present invention, the rear body compartment assembly 100 further includes a floor 5. The floor 5 is disposed on one side of the side longitudinal beam in the transverse direction and is connected to the side longitudinal beam. The cross beam structure 41 includes an upper cross beam 411 and a lower cross beam 412 that are spaced apart in the vertical direction. The upper cross beam 411 and the lower cross beam 412 are respectively disposed on both sides of the floor in the vertical direction and are respectively lapped at both ends of the side longitudinal beam in the vertical direction. The upper cross beam 411, the floor, and the side longitudinal beam enclose a fourth strengthening cavity 43, and the lower cross beam 412, the floor, and the side longitudinal beam enclose a fifth strengthening cavity 44. The side longitudinal beam has a cavity extending along the longitudinal direction, and the cavity of the side longitudinal beam forms a sixth strengthening cavity 33.

[0069] In this embodiment, the first force application node O is disposed on one side of the sixth strengthening cavity 33. When the first force application node O is excited, the sixth strengthening cavity 33 receives the external force transmitted from the first force application node O and transmits the force to the fourth strengthening cavity 43 and the fifth strengthening cavity 44. The sixth strengthening cavity 33, the fourth strengthening cavity 43, and the fifth strengthening cavity 44 are arranged at intervals in the transverse direction. The fourth strengthening cavity 43 and the fifth strengthening cavity 44 are arranged at intervals in the vertical direction, and the cavities of the sixth strengthening cavity 33, the fourth strengthening cavity 43, and the fifth strengthening cavity 44 extend along the longitudinal direction. Therefore, the settings of the fourth strengthening cavity 43, the fifth strengthening cavity 44, and the sixth strengthening cavity 33 are beneficial to the multi-directional transmission and uniform distribution of the force along the cavity, enabling the force to be effectively diffused step by step in sequence, improving the mechanical performance of the rear body compartment assembly 100 and the vehicle body, improving the stiffness and mode, improving the NVH performance, and improving the comfort of the vehicle occupants.

[0070] In summary, through the first strengthening cavity 12, the second strengthening cavity 23, the third strengthening cavity 24, the fourth strengthening cavity 43, the fifth strengthening cavity 44, and the sixth strengthening cavity 33, the force is transmitted in multiple directions and evenly distributed along the cavity, enabling the force to be effectively diffused step by step in sequence, improving the mechanical and NVH performance of the rear body compartment assembly 100 and the vehicle body, and improving the comfort of the vehicle occupants.

[0071] In addition, through layout and configuration optimization, the present invention achieves comprehensive improvement in the mechanical properties and NVH performance of the rear body compartment assembly 100. For example, in an embodiment of the present invention, a first sidewall force-bearing node is formed at the upper end of the strut plate 11, and a second sidewall force-bearing node is formed in the middle in the up-and-down direction. The rear body compartment assembly 100 further includes a second strut assembly 6 and a longitudinal connection assembly 7. The second strut assembly 6 is located on one side of the strut plate 11 in the longitudinal direction and is inclined upward toward the strut plate 11. The upper end of the second strut assembly 6 is connected to the strut plate 11, and the lower end is connected to the side longitudinal beam. The longitudinal connection assembly 7 is disposed longitudinally between the strut plate 11 and the second strut assembly 6 and connects the strut plate 11 and the second strut assembly 6. The second strut assembly 6 forms a third sidewall force-bearing node and a fourth sidewall force-bearing node at the two ends in the up-and-down direction respectively, and a fifth sidewall force-bearing node is formed in the middle in the up-and-down direction. A sixth sidewall force-bearing node is formed at the connection between the wheelhouse outer panel 212 and the longitudinal connection assembly 7. A seventh sidewall force-bearing node is formed at the connection between the wheelhouse outer panel 212, the second strut assembly 6, and the longitudinal connection assembly 7. The wheelhouse main structure 21 includes the wheelhouse outer panel 212. The wheelhouse outer panel 212 is disposed below the longitudinal connection assembly 7 and is connected to the strut plate 11, the second strut assembly 6, and the longitudinal connection assembly 7. The wheelhouse main structure 21 forms an eighth sidewall force-bearing node and a ninth sidewall force-bearing node at the two ends in the longitudinal direction respectively, and a tenth sidewall force-bearing node is formed in the middle in the longitudinal direction. An eleventh sidewall force-bearing node is formed at the connection between the wheelhouse main structure 21 and the lower end of the strut plate 11.

[0072] It should be noted that, please refer to Figure 12 , in this embodiment, the first sidewall force-bearing node is E1, the second sidewall force-bearing node is E2, the third sidewall force-bearing node is E3, the fourth sidewall force-bearing node is E4, the fifth sidewall force-bearing node is E5, the sixth sidewall force-bearing node is E6, the seventh sidewall force-bearing node is E7, the eighth sidewall force-bearing node is E8, the ninth sidewall force-bearing node is E9, the tenth sidewall force-bearing node is E10, and the eleventh sidewall force-bearing node is E11.

[0073] Furthermore, it should be noted that, in this embodiment, the first sidewall force-bearing node is arranged corresponding to the second force-bearing node, and the third sidewall force-bearing node is arranged corresponding to the fifth force-bearing node.

[0074] In this embodiment, there are eleven side wall force-bearing nodes, namely E1 - E11. Multiple force paths are formed by the intersection of these side wall force-bearing nodes. For example, in a specific embodiment of the present invention, an external force is transmitted from the first force-bearing node O to the third side wall force-bearing node E3, then transmitted from the third side wall force-bearing node E3 to the fifth side wall force-bearing node E5, and then transmitted from the fifth side wall force-bearing node E5 to the fourth side wall force-bearing node E4.

[0075] Alternatively, in another specific embodiment of the present invention, the external force is transmitted from the first force-bearing node O to the eleventh side wall force-bearing node E11, then transmitted from the eleventh side wall force-bearing node E11 to the second side wall force-bearing node E2, and then transmitted from the second side wall force-bearing node E2 to the second force-bearing node A (i.e., the first side wall force-bearing node E1), realizing the sequential transmission and distribution of the external force step by step.

[0076] With such an arrangement, the force paths between multiple side wall force-bearing nodes and multiple force-bearing nodes intersect to form a composite grid area. Under the combined action of the side wall force-bearing nodes, the force-bearing nodes, the force paths, and the composite grid area, the spatial force-bearing configuration of the rear cabin assembly 100 of the vehicle is optimized, realizing the comprehensive improvement of the mechanical properties and NVH performance of the rear cabin assembly 100 of the vehicle in multiple directions, thereby enhancing the comfort of the vehicle occupants.

[0077] It should also be noted that in a further embodiment of the present invention, the first side wall force-bearing node E1, the fourth side wall force-bearing node E4, the third side wall force-bearing node E3, and the eighth side wall force-bearing node E8 form an E1E4E3E8 spatial force-bearing area within the macroscopic spatial layout area of the rear cabin assembly 100 of the vehicle, improving the mechanical properties of the rear cabin assembly 100 of the vehicle and the body, improving the stiffness and mode, improving the NVH performance, and improving the comfort of the vehicle occupants.

[0078] To further optimize the force-bearing form of the rear body compartment assembly 100, in another embodiment of the present invention, there are two side longitudinal beam assemblies 3. The two side longitudinal beam assemblies 3 are respectively arranged on both lateral sides of the cross beam structure 41 and are respectively connected to both ends of the cross beam structure 41. First floor force-bearing nodes and second floor force-bearing nodes are formed at the connection positions of the two side longitudinal beam assemblies 3 and the cross beam structure 41. The cross beam assembly 4 further includes an intermediate cross beam 45, a rear cross beam 46, and a tail cross beam 47. The intermediate cross beam 45 and the rear cross beam 46 are respectively arranged on both longitudinal sides of the cross beam structure 41. The tail cross beam 47 is arranged on the side of the rear cross beam 46 away from the cross beam structure 41. The intermediate cross beam 45, the rear cross beam 46, and the tail cross beam 47 are all connected to the two side longitudinal beam assemblies 3. Third floor force-bearing nodes and fourth floor force-bearing nodes are formed at the connection positions of the intermediate cross beam 45 and the two side longitudinal beam assemblies 3. Fifth floor force-bearing nodes and sixth floor force-bearing nodes are formed at the connection positions of the rear cross beam 46 and the two side longitudinal beam assemblies 3. Seventh floor force-bearing nodes and eighth floor force-bearing nodes are formed at the connection positions of the tail cross beam 47 and the two side longitudinal beam assemblies 3. The rear body compartment assembly 100 further includes a connection assembly 8. The connection assembly 8 includes a first connection plate 81, a second connection plate 82, and a third connection plate 83. The first connection plate 81 connects the intermediate cross beam 45 and the cross beam structure 41, and ninth floor force-bearing nodes and tenth floor force-bearing nodes are respectively formed at the corresponding connection positions. The second connection plate 82 connects the rear cross beam 46 and the cross beam structure 41, and eleventh floor force-bearing nodes and twelfth floor force-bearing nodes are respectively formed at the corresponding connection positions. The third connection plate 83 connects the tail cross beam 47 and the rear cross beam 46, and thirteenth floor force-bearing nodes and fourteenth floor force-bearing nodes are respectively formed at the corresponding connection positions.

[0079] It should be noted that, please refer to Figure 13 , in this embodiment, the first floor force-bearing node is F1, the second floor force-bearing node is F2, the third floor force-bearing node is F3, the fourth floor force-bearing node is F4, the fifth floor force-bearing node is F5, the sixth floor force-bearing node is F6, the seventh floor force-bearing node is F7, the eighth floor force-bearing node is F8, the ninth floor force-bearing node is F9, the tenth floor force-bearing node is F10, the eleventh floor force-bearing node is F11, the twelfth floor force-bearing node is F12, the thirteenth floor force-bearing node is F13, and the fourteenth floor force-bearing node is F14.

[0080] It should be further noted that, in this embodiment, the first floor stress node F1 and the second floor stress node F2 are respectively arranged corresponding to the third stress node B at both ends of the crossbeam structure, the third floor stress node F3 and the fourth floor stress node F4 are respectively arranged corresponding to the fourth stress node C of the two side longitudinal beams, and the seventh floor stress node F7 and the eighth floor stress node F8 are respectively arranged corresponding to the fifth stress node D of the two side longitudinal beams.

[0081] It can be understood that, in this embodiment, there are fourteen floor stress nodes, namely F1 - F14. Multiple stress paths are formed by the intersection of the fourteen floor stress nodes. For example, in a specific embodiment of the present invention, an external force can be transmitted from the third floor stress node F3 (i.e., the fourth stress node C) to the first floor stress node F1, and then transmitted from the first floor stress node F1 to the fifth floor stress node F5, and then transmitted from the fifth floor stress node F5 to the seventh floor stress node F7 (i.e., the fifth stress node D).

[0082] In another specific embodiment of the present invention, an external force can be transmitted from the third floor stress node F3 and / or the fourth floor stress node F4 to the ninth floor stress node F9, and then transmitted from the ninth floor stress node F9 to the tenth floor stress node F10, and then transmitted from the tenth floor stress node F10 to the eleventh floor stress node F11. After that, it is transmitted from the eleventh floor stress node F11 to the twelfth floor stress node F12, then from the twelfth floor stress node F12 to the sixth floor stress node F6, and then from the sixth floor stress node F6 to the eighth floor stress node F8 (i.e., the fifth stress node D).

[0083] With such an arrangement, multiple floor stress nodes and the stress paths between the multiple stress nodes intersect to form a composite grid area. Under the combined action of the floor stress nodes, the stress nodes, the stress paths, and the composite grid area, the spatial stress configuration of the rear cabin assembly 100 of the vehicle is optimized, realizing the comprehensive improvement of the mechanical performance and NVH performance of the rear cabin assembly 100 of the vehicle in multiple directions, thereby improving the comfort of the vehicle occupants.

[0084] In summary, in the present invention, by arranging multiple side wall stress nodes and multiple floor stress nodes, a composite grid area and a spatial stress area are formed, optimizing the spatial configuration and structural characteristics of the rear cabin assembly 100 of the vehicle, improving the stiffness and modal of the rear cabin assembly 100 of the vehicle, and enhancing the mechanical and NVH and other performances of the rear cabin assembly 100 of the vehicle and the vehicle body.

[0085] In addition, please refer to Figure 14 In an embodiment of the present invention, the crossbeam assembly 4 further includes a roof crossbeam 48 which extends horizontally. There are two end plates 42, and the two end plates 42 are spaced apart horizontally. There are two of the first pillar assemblies 1 and two of the wheelhouse assemblies 2. The two first pillar assemblies 1 and the two wheelhouse assemblies 2 are respectively arranged on both sides of the crossbeam structure 41 horizontally. The two first pillar assemblies 1 are respectively connected to the two ends of the roof crossbeam 48 horizontally. The two inner wheelhouse reinforcing plates 22 are respectively connected to the two end plates 42. The roof crossbeam 48, the crossbeam structure 41, the two end plates 42, the two first pillar assemblies 1, the two wheelhouse assemblies 2, and the two side longitudinal beam assemblies 3 enclose to form a first strengthening ring. The setting of the first strengthening ring enhances the tightness of the mutual connection and coupling between the composite grid regions in all directions of the rear body compartment assembly 100, constitutes an integral composite space frame structure, forms a space section, improves the stiffness and mode of the rear body compartment assembly 100 and the body, as well as the corresponding mechanical and NVH performances, and improves the comfort of the vehicle occupants.

[0086] Of course, considering the space dimensions of the rear body compartment assembly 100 and the body, multiple space ring structures can be arranged longitudinally to optimize the mechanical performance of the rear body compartment assembly 100. Please refer to Figure 15 In another embodiment of the present invention, the rear body compartment assembly 100 further includes two second pillar assemblies 6. The two second pillar assemblies 6 are both located on one side of the pillar plate 11 longitudinally and are spaced apart horizontally. The two second pillar assemblies 6 both extend vertically. The crossbeam assembly 4 further includes a tail crossbeam 47 and a rear top crossbeam 49. The tail crossbeam 47 and the rear top crossbeam 49 both extend horizontally. The tail crossbeam 47 is located on one side of the crossbeam structure 41 longitudinally, and the two lower ends of the two second pillar assemblies 6 are respectively connected to the two ends of the tail crossbeam 47 horizontally. The rear top crossbeam 49 is arranged above the tail crossbeam 47, and the two upper ends of the two second pillar assemblies 6 are respectively connected to the two ends of the rear top crossbeam 49 horizontally. With such a setting, the second pillar assemblies 6, the tail crossbeam 47, and the rear top crossbeam 49 enclose to form a second strengthening ring. The setting of the second strengthening ring enhances the tightness of the mutual connection and coupling between the composite grid regions in all directions of the rear body compartment assembly 100, constitutes an integral composite space frame structure, forms a space section, improves the stiffness and mode of the rear body compartment assembly 100 and the body, as well as the corresponding mechanical and NVH performances, and improves the comfort of the vehicle occupants.

[0087] In this embodiment, the combined arrangement of the first reinforcing ring and the second reinforcing ring closely associates and couples the composite grid areas in all directions of the rear body compartment assembly 100 to form an integral space, forming a basic frame and cabin structure. Each layout feature is intertwined and complementary, improving the stiffness, mode, and corresponding mechanical NVH and other performances of the rear body compartment assembly 100 and the vehicle body, and improving the comfort of the vehicle occupants.

[0088] It should be noted that since the second reinforcing ring is arranged near the tail of the rear body compartment assembly 100, to further improve the mechanical performance of the second reinforcing ring, please refer to Figure 16 , in an embodiment of the present invention, each of the second strut assemblies 6 is provided with a cavity structure, and the cavity of the second strut assembly 6 forms a seventh reinforcing cavity 61. In this way, the setting of the seventh reinforcing cavity 61 improves the stiffness, mode, and other performances of the second strut assembly 6. Also, since the second strut assembly 6 is a part of the second reinforcing ring, therefore, the setting of the seventh reinforcing cavity 61 further improves the mechanical and NVH and other performances of the second reinforcing ring.

[0089] Please refer to Figure 17 , in another embodiment of the present invention, the tail cross beam 47 has a cavity extending transversely, and the cavity of the tail cross beam 47 forms an eighth reinforcing cavity 471. In this way, the setting of the eighth reinforcing cavity 471 improves the stiffness, mode, and other performances of the tail cross beam 47. Also, since the tail cross beam 47 is also a part of the second reinforcing ring, therefore, the setting of the eighth reinforcing cavity 471 further improves the mechanical and NVH and other performances of the second reinforcing ring.

[0090] In still another embodiment of the present invention, the rear top cross beam 49 has a cavity extending transversely, and the cavity of the rear top cross beam 49 forms a ninth reinforcing cavity 491. Similarly, the setting of the ninth reinforcing cavity 491 improves the stiffness, mode, and other performances of the rear top cross beam 49, and the rear top cross beam 49 is also a part of the second reinforcing ring. Therefore, the setting of the ninth reinforcing cavity 491 further improves the mechanical and NVH and other performances of the second reinforcing ring.

[0091] In this embodiment, the settings of the seventh reinforcing cavity 61, the eighth reinforcing cavity 471, and the ninth reinforcing cavity 491 improve the mechanical performances such as the structural strength of the second reinforcing ring, as well as the NVH performances such as stiffness and mode, and improve the comfort of the vehicle occupants.

[0092] In summary, the present invention is designed with force-bearing nodes, force paths, force cavities, spatial force regions, spatial cross-sections, composite grid regions, composite spatial frame structures, etc. Combining unique cross-section layout designs, effective cross-section structural features, and novel cross-section lap matching relationships, it realizes the improvement of the overall performance of the rear body compartment assembly and the vehicle body. By setting multiple force-bearing nodes, multiple force path forms are constructed, and under the combined action of the force-bearing nodes and force paths, the externally applied forces are effectively and stably dispersed. The setting of multiple force cavities forms a unique spatial structure, which is conducive to the multi-directional transfer and uniform distribution of forces along the cavities. The composite intersection and cooperation of the force-bearing nodes, force paths, and force cavities enable the forces to be transferred and diffused step by step in sequence. The force paths at the intersections of multiple sidewall force-bearing nodes, multiple floor force-bearing nodes, and multiple force-bearing nodes form a composite grid region. The setting of the first strengthening ring and the second strengthening ring forms a spatial cross-section. The composite grid region and the spatial cross-section are closely related and coupled. Each layout feature is intertwined and complementary, constituting an integral composite spatial frame structure, building the basic framework of the rear body compartment assembly, thereby optimizing the force configuration of the rear body compartment assembly, improving the stiffness, modal properties, and corresponding mechanical and NVH performance of the rear body compartment assembly and the vehicle body, and improving the comfort of the vehicle occupants.

[0093] The present invention also provides an automobile, which includes a rear body compartment assembly 100. The specific structure of the rear body compartment assembly 100 refers to the above-mentioned embodiments. Since this automobile adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one.

[0094] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A vehicle body rear compartment assembly, characterized in that: include: The first support column assembly includes a support column plate extending in an up-down direction; A wheel cover assembly, comprising a wheel cover main structure and a wheel cover inner plate reinforcement plate, wherein the wheel cover main structure and the wheel cover inner plate reinforcement plate are arranged at intervals in the transverse direction and are both connected to the lower end of the support plate; A side longitudinal beam assembly, comprising a side longitudinal beam extending in the longitudinal direction, and a chassis fixing plate arranged at one end of the side longitudinal beam in the transverse direction, wherein the side longitudinal beam and the chassis fixing plate are both arranged below the main structure of the wheel cover, and the chassis fixing plate is connected to the main structure of the wheel cover; and A crossbeam assembly, comprising a crossbeam structure extending in a transverse direction, and an end plate provided on the crossbeam structure, wherein the crossbeam structure is overlapped and connected with a portion of the side longitudinal beam, and the end plate connects the crossbeam structure and the wheel house inner plate reinforcement plate; Among them, a first stress node is arranged at the position of the chassis fixing plate, the first stress node is connected and supported by the end plate, the wheel house inner plate reinforcement plate, the wheel house main structure, and the side longitudinal beam, and is used to fix the chassis shock absorber, the upper end of the support plate forms a second stress node, the end of the crossbeam structure away from the side longitudinal beam forms a third stress node, and the two ends of the side longitudinal beam form a fourth stress node and a fifth stress node respectively.

2. The vehicle body rear compartment assembly according to claim 1, characterized in that: The pillar plate includes a pillar inner plate and a pillar outer plate which are spaced apart in the transverse direction, and the pillar inner plate and the pillar outer plate enclose a first reinforcement cavity; The wheel cover main structure comprises a wheel cover inner plate, a wheel cover outer plate and a wheel cover support plate, the wheel cover outer plate connects the pillar inner plate and the pillar outer plate, the wheel cover support plate is arranged below the wheel cover outer plate to connect the wheel cover outer plate and the chassis fixing plate, the wheel cover inner plate is arranged on one side of the wheel cover outer plate and the wheel cover support plate in the lateral direction, and connects the wheel cover outer plate and the wheel cover support plate, the wheel cover inner plate, the wheel cover outer plate and the wheel cover support plate enclose a second reinforcement cavity; The wheel house inner panel reinforcement plate, the wheel house inner panel, the wheel house outer panel, the wheel house support plate, the chassis fixing plate and the end plate together form a third reinforcement cavity.

3. The vehicle body rear compartment assembly according to claim 1, characterized in that: The vehicle body rear compartment assembly further includes a floor, which is arranged on one side of the side longitudinal beam in the transverse direction and connected to the side longitudinal beam; The crossbeam structure includes an upper crossbeam and a lower crossbeam spaced apart in the vertical direction, wherein the upper crossbeam and the lower crossbeam are respectively arranged on both sides of the floor in the vertical direction and overlapped at both ends of the side longitudinal beam in the vertical direction; The upper cross beam, the floor and the side longitudinal beams enclose a fourth reinforcement cavity; The lower cross beam, the floor and the side longitudinal beams enclose a fifth reinforcement cavity; The side longitudinal beam has a cavity extending in the longitudinal direction, and the cavity of the side longitudinal beam forms a sixth reinforcement cavity.

4. The vehicle body rear compartment assembly according to claim 1, characterized in that: The upper end of the support plate is formed with a first side-enclosing force node, and the middle part in the vertical direction is formed with a second side-enclosing force node; The vehicle body rear compartment assembly also includes a second pillar assembly and a longitudinal connection assembly, the second pillar assembly is located on one side of the pillar plate in the longitudinal direction, and is inclined from bottom to top toward the pillar plate, the upper end of the second pillar assembly is connected to the pillar plate, and the lower end is connected to the side longitudinal beam, the longitudinal connection assembly is arranged between the pillar plate and the second pillar assembly in the longitudinal direction, and connects the pillar plate and the second pillar assembly, the second pillar assembly is respectively formed with a third side surrounding force node and a fourth side surrounding force node at both ends in the up-down direction, and a fifth side surrounding force node is formed in the middle part in the up-down direction, a sixth side surrounding force node is formed at the connection between the wheel house outer panel and the longitudinal connection assembly, and a seventh side surrounding force node is formed at the connection between the wheel house outer panel, the second pillar assembly and the longitudinal connection assembly; The wheel cover main structure comprises a wheel cover outer plate, the wheel cover outer plate is arranged at the lower side of the longitudinal connection assembly, and connects the pillar plate, the second pillar assembly and the longitudinal connection assembly, the wheel cover main structure is respectively formed with an eighth side surrounding force node and a ninth side surrounding force node at both ends in the longitudinal direction, a tenth side surrounding force node is formed in the middle in the longitudinal direction, and an eleventh side surrounding force node is formed at the connection between the wheel cover main structure and the lower end of the pillar plate; Among them, the first side enclosure force node is set corresponding to the second force node, and the third side enclosure force node is set corresponding to the fifth force node.

5. The vehicle body rear compartment assembly according to claim 1, characterized in that: There are two side longitudinal beam assemblies, which are arranged on both sides of the cross beam structure in the transverse direction and are respectively connected to the two ends of the cross beam structure, and the connection between the two side longitudinal beam assemblies and the cross beam structure forms a first floor stress node and a second floor stress node; The cross beam assembly also includes a middle cross beam, a rear cross beam and a tail cross beam, the middle cross beam and the rear cross beam are respectively arranged on both sides of the cross beam structure in the longitudinal direction, the tail cross beam is arranged on a side of the rear cross beam away from the cross beam structure, and the middle cross beam, the rear cross beam and the tail cross beam are all connected to the two side longitudinal beam assemblies, a third floor stress node and a fourth floor stress node are formed at the connection between the middle cross beam and the two side longitudinal beam assemblies, a fifth floor stress node and a sixth floor stress node are formed at the connection between the rear cross beam and the two side longitudinal beam assemblies, and a seventh floor stress node and an eighth floor stress node are formed at the connection between the tail cross beam and the two side longitudinal beam assemblies; The vehicle body rear compartment assembly also includes a connection component, which includes a first connection plate, a second connection plate and a third connection plate, the first connection plate connects the middle cross beam and the cross beam structure, and respectively forms a ninth floor force node and a tenth floor force node at corresponding connections, the second connection plate connects the rear cross beam and the cross beam structure, and respectively forms an eleventh floor force node and a twelfth floor force node at corresponding connections, the third connection plate connects the tail cross beam and the rear cross beam, and respectively forms a thirteenth floor force node and a fourteenth floor force node at corresponding connections; Among them, the first floor force node and the second floor force node respectively correspond to the third force node settings at both ends of the beam structure, the third floor force node and the fourth floor force node respectively correspond to the fourth force node settings of the two side longitudinal beams, and the seventh floor force node and the eighth floor force node respectively correspond to the fifth force node settings of the two side longitudinal beams.

6. The vehicle body rear compartment assembly as claimed in claim 1, characterized in that: The crossbeam assembly further comprises a roof crossbeam, the roof crossbeam is arranged to extend in the transverse direction, two end plates are provided, and the two end plates are arranged at intervals in the transverse direction; The first pillar assembly and the wheel house assembly are each provided with two, and the two first pillar assemblies and the two wheel house assemblies are respectively arranged on both sides of the crossbeam structure in the horizontal direction, and the two first pillar assemblies are respectively connected to the two ends of the roof crossbeam in the horizontal direction, and the two wheel house inner panel reinforcement plates are respectively connected to the two end plates, and the roof crossbeam, the crossbeam structure, the two end plates, the two first pillar assemblies, the two wheel house assemblies, and the two side longitudinal beam assemblies enclose a first reinforcement ring.

7. The vehicle body rear compartment assembly according to claim 1, characterized in that: The vehicle body rear compartment assembly further includes two second pillar assemblies, both of which are located on one side of the pillar plate in the longitudinal direction and are arranged at intervals in the transverse direction, and both of which are extended in the up-down direction; The crossbeam assembly also includes a tail crossbeam and a rear top crossbeam, both of which are extended in the transverse direction. The tail crossbeam is located on one side of the crossbeam structure in the longitudinal direction, and its two ends in the transverse direction are respectively connected to the lower ends of the two second pillar assemblies. The rear top crossbeam is arranged above the tail crossbeam, and its two ends in the transverse direction are respectively connected to the upper ends of the two second pillar assemblies.

8. The vehicle body rear compartment assembly according to claim 7, characterized in that: Each of the second pillar assemblies is provided with a cavity structure, and the cavity of the second pillar assembly forms a seventh reinforcement cavity.

9. The vehicle body rear compartment assembly according to claim 7, characterized in that: The tail cross beam has a cavity extending in a transverse direction, and the cavity of the tail cross beam forms an eighth reinforcement cavity; and / or, The rear top cross beam has a cavity extending in the transverse direction, and the cavity of the rear top cross beam forms a ninth reinforcement cavity.

10. An automobile, characterized in that: It comprises a vehicle body rear compartment assembly as described in any one of claims 1 to 9.

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