Vehicle body rear assembly and vehicle

Abstract

The invention discloses a vehicle body rear assembly and a vehicle and relates to the technical field of vehicles, the vehicle body rear assembly is used for improving the anti-collision capacity of the vehicle body rear, the vehicle body rear assembly comprises a rear floor assembly, a transverse beam component and an energy absorption part, and the transverse beam component is arranged on the rear side of the rear floor assembly in the length direction of the vehicle body and arranged in the width direction of the vehicle body. The energy absorption piece is connected between the rear floor assembly and the transverse beam component; the energy absorption part comprises a plurality of separation parts and a plurality of crumple parts, the separation parts are arranged at intervals in the length direction, the crumple parts are arranged between any two adjacent separation parts, the crumple parts are connected with the adjacent separation parts, and the crumple parts are arranged at intervals in the width direction. The vehicle body rear assembly is used for supporting and protecting the rear portion of the vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and in particular, to a rear body assembly and a vehicle. Background Art

[0002] With the development of vehicle technology, the technological performance of vehicles has made great progress. At the same time, the safety performance of vehicles also needs to meet requirements.

[0003] In related technologies, the rear part of the rear floor member of a vehicle has a cross beam and a longitudinal beam. The cross beam and the longitudinal beam can play a role in buffering and energy absorption after a collision occurs at the rear of the vehicle, so as to reduce the collision force transmitted to the vehicle cockpit. However, the buffering effect of the cross beam and the longitudinal beam is limited, so the anti-collision ability of the rear part of the vehicle is limited. Summary of the Invention

[0004] To solve the above technical problems, the present application provides a rear body assembly and a vehicle, which are used to improve the anti-collision ability of the rear part of the vehicle.

[0005] The present application is implemented through the following technical solutions.

[0006] A first aspect of the present application provides a rear body assembly, including a rear floor assembly, a transverse beam member, and an energy absorption member. Along the length direction of the vehicle body, the transverse beam member is disposed behind the rear floor assembly and is arranged along the width direction of the vehicle body. The energy absorption member is connected between the rear floor assembly and the transverse beam member; the energy absorption member includes a plurality of partition parts and a plurality of crush parts. The plurality of partition parts are arranged at intervals along the length direction, and a plurality of crush parts are arranged between any two adjacent partition parts. The crush parts are respectively connected to the adjacent partition parts, and the plurality of crush parts are arranged at intervals along the width direction.

[0007] In the technical solution of the embodiment of the present application, the rear floor assembly, the transverse beam member, and the energy absorption member constitute the rear body assembly. When the rear body assembly is impacted, the transverse beam member will first receive the collision force, and then the collision force is transmitted to the rear floor assembly through the energy absorption member. During the transmission of the collision force, the transverse beam member, the energy absorption member, and the rear floor assembly can all absorb a part of the collision force, thereby reducing the collision force transmitted to the front side of the rear body assembly and improving the safety of the personnel in the cockpit located on the front side of the rear body assembly.

[0008] Since the energy absorption member includes a plurality of partition parts and a plurality of crush parts, along the length direction of the vehicle body, the collision force will be alternately transmitted between the plurality of partition parts and the plurality of crush parts. During the transmission process, the partition parts and the crush parts will buffer the collision force through deformation, so as to achieve the effect of crush energy absorption. The energy absorption member with such a structure has a good energy absorption and buffering effect, and can effectively improve the anti-collision ability of the rear body assembly.

[0009] In some embodiments of the present application, the middle part of the collapsible portion in the length direction protrudes to one side in the width direction.

[0010] With such a setting, when the collision force is transmitted to the collapsible portion, since the middle part of the collapsible portion protrudes to one side in the width direction and there is a space on one side of the collapsible portion in the width direction, the collapsible portion can deform through the space on one side in the width direction to relieve the force, so that a better collapsible energy absorption effect can be achieved.

[0011] In some embodiments of the present application, the multiple collapsible portions between any adjacent partition portions include a first collapsible portion; in the length direction, the first collapsible portions between any adjacent two partition portions are arranged in sequence, and the middle parts of any adjacent first collapsible portions protrude in opposite directions in the length direction.

[0012] With such a setting, since the first collapsible portions between any adjacent two partition portions are arranged in sequence and the middle parts of any adjacent first collapsible portions protrude in opposite directions, during the transmission of the collision force, in the length direction, the guiding directions of the adjacent first collapsible portions for the collision force are opposite, so that a better collapsible energy absorption effect can be achieved.

[0013] In some embodiments of the present application, the multiple collapsible portions between any adjacent two partition portions further include a second collapsible portion adjacent to the first collapsible portion; between the same adjacent partition portions, the middle part of the first collapsible portion in the length direction and the middle part of the second collapsible portion in the length direction protrude in opposite directions, and the first collapsible portion and the second collapsible portion close to the transverse beam member protrude in opposite directions, and the first collapsible portion and the second collapsible portion close to the rear floor assembly protrude in the direction of approaching each other.

[0014] With such a setting, since the first collapsible portion and the second collapsible portion close to the transverse beam member protrude in opposite directions, while the first collapsible portion and the second collapsible portion close to the rear floor assembly protrude in the direction of approaching each other, the first space between the first collapsible portion and the second collapsible portion close to the transverse beam member is larger than the second space between the first collapsible portion and the second collapsible portion close to the rear floor assembly. The first space can provide a larger deformation space than the second space, so that a gradually decreasing energy absorption can be realized in the direction from the rear part to the front part of the vehicle body.

[0015] In some embodiments of the present application, the plurality of crush parts between any adjacent partition parts further includes: a third crush part. Along the width direction, the third crush part is provided on both sides of the first crush part and the second crush part that face away from each other. Among two adjacent partition parts close to the rear floor assembly, the two adjacent partition parts, the adjacent third crush part, and the first crush part enclose a first buffer space, and the two adjacent partition parts, the adjacent third crush part, and the second crush part enclose a second buffer space. The energy absorber further includes an inclined part, and the inclined part is inclined and supported in at least one of the first buffer space and the second buffer space. The inclination direction of the inclined part intersects both the width direction and the length direction.

[0016] With such an arrangement, the inclined part can improve the structural stability of the first buffer space and / or the second buffer space, thereby improving the overall crush energy absorption effect of the energy absorber.

[0017] In some embodiments of the present application, the inclined parts in the first buffer space and the inclined parts in the second buffer space have opposite inclination trends.

[0018] With such an arrangement, the inclined parts in the first buffer space and the inclined parts in the second buffer space are approximately symmetric or symmetric about the length direction. In this way, the approximate similarity of the crush energy absorption effects on both sides of the energy absorber about the length direction can be ensured, so as to improve the overall crush energy absorption effect of the energy absorber.

[0019] In some embodiments of the present application, the rear floor assembly includes a rear floor member and two longitudinal beam members. The longitudinal beam members are connected to one side of the rear floor member close to the transverse beam member and extend along the length direction. The two longitudinal beam members are spaced apart along the width direction. An energy absorber is provided between the longitudinal beam member and the transverse beam member.

[0020] With such an arrangement, since the energy absorber is provided between the transverse beam member and the longitudinal beam member, the collision force received by the transverse beam member will be transmitted to the longitudinal beam member through the energy absorber, and then transmitted to the rear floor member, so as to achieve multi-stage crush energy absorption of the collision force. The space between the two longitudinal beam members can provide space for the deformation of the transverse beam member, so as to facilitate the removal of the collision force received by the transverse beam member.

[0021] In some embodiments of the present application, the rear floor assembly further includes a transverse strengthening member. The transverse strengthening member is connected between the two longitudinal beam members and extends along the width direction. The cross-section of the transverse strengthening member perpendicular to its extending direction is a groove-like structure.

[0022] With such a setting, the transverse reinforcing member can enhance the mutual acting force between the two longitudinal beam members in the width direction, thereby ensuring the structural strength. Since the cross-section of the transverse reinforcing member perpendicular to its extending direction is a groove-like structure, not only is the weight of the transverse reinforcing member reduced, but also the area enclosed by the cross-section of the transverse reinforcing member is ensured, thereby ensuring the structural strength of the transverse reinforcing member and its anti-collision ability.

[0023] In some embodiments of the present application, the rear body assembly further includes a reinforcing member disposed along the circumferential direction of the longitudinal beam member; the reinforcing member extends from the peripheral wall surface of the longitudinal beam member towards the energy-absorbing member and away from the longitudinal beam member, and a buffer cavity is formed between the reinforcing member and the intersection of the energy-absorbing member and the longitudinal beam member. The reinforcing member abuts against the side of the energy-absorbing member facing away from the transverse beam member and is connected to the longitudinal beam member.

[0024] With such a setting, along the length direction, the reinforcing member can provide backward support for the energy-absorbing member. Thus, when the energy-absorbing member is subjected to a forward collision force, the reinforcing member can improve the setting stability of the energy-absorbing member. Since the cross-section of the buffer cavity perpendicular to the radial direction of the longitudinal beam member is triangular, more sufficient support can be provided for the energy-absorbing member. Moreover, due to the existence of the buffer cavity, a certain buffer space can be provided for the deformation of the energy-absorbing member, thereby further improving the crash energy absorption effect.

[0025] The second aspect of the present application provides a vehicle including the rear body assembly in any of the above embodiments.

[0026] In the technical solution of the embodiments of the present application, since the rear body assembly in any of the above embodiments is included, the same beneficial effects can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0028] Figure 1 is an external structural schematic diagram of a rear body assembly provided in some embodiments of the present application;

[0029] Figure 2 is a top view schematic diagram of an energy-absorbing member provided in some embodiments of the present application;

[0030] Figure 3 is an exploded schematic diagram of an energy-absorbing member and a transverse beam member provided in some embodiments of the present application;

[0031] Figure 4An exploded schematic view of the rear body assembly provided for some embodiments of the present application;

[0032] Figure 5 A top view schematic of the rear body assembly provided for some embodiments of the present application;

[0033] Figure 6 A bottom view schematic of the rear body assembly provided for some embodiments of the present application;

[0034] Figure 7 A side view schematic of the rear body assembly provided for some embodiments of the present application;

[0035] Figure 8 A partial side view of the rear body assembly provided for some embodiments of the present application;

[0036] Figure 9 For Figure 5 The sectional schematic view at A-A in

[0037] Figure 10 For Figure 9 The sectional view within the range of E1-E1 in

[0038] Figure 11 For Figure 5 The sectional schematic view at B-B in

[0039] Figure 12 For Figure 11 The sectional view within the range of E2-E2 in

[0040] Figure 13 For Figure 5 The sectional schematic view at C-C in

[0041] Figure 14 The first external structural schematic of the reinforcement provided on the longitudinal beam member for some embodiments of the present application;

[0042] Figure 15 The second external structural schematic of the reinforcement provided on the longitudinal beam member for some embodiments of the present application;

[0043] Figure 16 The first exploded schematic of the longitudinal beam member and the reinforcement for some embodiments of the present application;

[0044] Figure 17 The second exploded schematic of the longitudinal beam member and the reinforcement for some embodiments of the present application;

[0045] Figure 18 The first sectional schematic of the connection between the longitudinal beam member and the reinforcement for some embodiments of the present application;

[0046] Figure 19 The second cross-sectional schematic diagram of the connection between the longitudinal beam member and the reinforcement provided for some embodiments of the present application;

[0047] Figure 20 The external structural schematic diagram of the energy absorption member provided for some embodiments of the present application.

[0048] Explanation of reference numerals

[0049] 1 - Rear body assembly; 100 - Rear floor assembly; 110 - Rear floor member; 111 - Rear floor body; 112 - Plate group; 1121 - First plate body; 1122 - Second plate body; 1123 - Third plate body; 1124 - Third overlapping portion; a - Opening; 120 - Longitudinal beam member; 121 - Second overlapping portion; 130 - Transverse reinforcement member; 131 - First overlapping portion; 200 - Transverse beam member; 300 - Energy absorption member; 310 - Partition portion; 320 - Crushing portion; 32a - First crushing portion; 32b - Second crushing portion; 32c - Third crushing portion; c - First buffer space; c1 - First buffer sub - space; c2 - Second buffer sub - space; d - Second buffer space; d1 - Third buffer sub - space; d2 - Fourth buffer sub - space; e1 - First space; e2 - Second space; 321 - First sub - portion; 322 - Protrusion; 323 - Second sub - portion; 330 - Oblique portion; 331 - First oblique portion; 332 - Second oblique portion; k1 - First intersection point; k2 - Second intersection point; k3 - Third intersection point; k4 - Fourth intersection point; k5 - Fifth intersection point; k6 - Sixth intersection point; k7 - Seventh intersection point; k8 - Eighth intersection point; 400 - Reinforcement; 410 - Reinforcement portion; b - Buffer cavity; 411 - First reinforcement portion; 412 - Second reinforcement portion; 500 - Transfer member; 510 - First transfer plate; 520 - Second transfer plate; 521 - First clamping plate; 522 - Second clamping plate; M1 - First frame; M2 - Second frame; M2 - Third frame; X - Length direction; Y - Width direction; Z - Height direction. Detailed implementation manners

[0050] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above - mentioned drawings are intended to cover non - exclusive inclusion.

[0052] In the description of the embodiments of the present application, technical terms such as "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise clearly and specifically defined.

[0053] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0054] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0055] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed, operated or used in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0057] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0058] Below, this application is described in detail.

[0059] With the development of vehicle technology, the technological performance of vehicles has made great progress. At the same time, the safety performance of vehicles also needs to meet the requirements. For example, for new energy vehicles, since batteries are flammable and explosive objects, the anti-collision ability requirements of the vehicle body are getting higher and higher.

[0060] Based on this, the present application provides a vehicle, which includes a rear body assembly.

[0061] Among them, the rear body assembly refers to the components located at the rear of the body and near the trunk of the vehicle, which perform supporting and safety protection functions.

[0062] By arranging the rear body assembly on the vehicle, the rear body assembly can play a supporting and protective function. In this way, after the rear of the vehicle is hit, the rear body assembly can play a buffering effect to protect the safety of people in the cockpit located in front of the rear body assembly.

[0063] In the related art, the rear vehicle assembly includes a rear floor member, a crossbeam and a longitudinal beam. The longitudinal beam is located between the crossbeam and the rear floor member. After a collision occurs at the rear of the vehicle, the crossbeam and the longitudinal beam can play a buffering and energy-absorbing role to reduce the collision force transmitted to the front side of the vehicle in the cockpit. However, the buffering effect of the crossbeam and the longitudinal beam is limited, so the anti-collision ability of the rear of the vehicle is limited.

[0064] Based on this, Figures 1 - 3 As shown, the present application also provides a vehicle body rear assembly 1, which includes a rear floor assembly 100, a transverse beam member 200 and an energy absorbing member 300. The transverse beam member 200 is arranged at the rear side of the rear floor assembly 100 along the length direction X of the vehicle body, and is arranged along the width direction Y of the vehicle body. The energy absorbing member 300 is connected between the rear floor assembly 100 and the transverse beam member 200; the energy absorbing member 300 includes a plurality of partitions 310 and a plurality of crushed portions 320, the plurality of partitions 310 are arranged at intervals along the length direction X, and a plurality of crushed portions 320 are arranged between any two adjacent partitions 310, and the crushed portions 320 are respectively connected to the adjacent partitions 310, and the plurality of crushed portions 320 are arranged at intervals along the width direction Y.

[0065] It should be explained that the transverse beam member 200 extends along the width direction Y, which does not mean that the transverse beam member 200 extends in a fixed direction in a strict sense, but that a certain angle deviation relative to the width direction Y is allowed, and in the process of extension, the extension shape of the transverse beam member 200 is not limited, as long as the trend is to extend along the width direction Y. In addition, the plurality of partitions 310 are arranged at intervals along the length direction X, which does not mean that the plurality of partitions 310 are arranged at intervals along a fixed direction in a strict sense, but that a certain angle deviation relative to the length direction X is allowed. Similarly, the plurality of collapse portions 320 are arranged at intervals along the width direction Y, which does not mean that the collapse portions 320 are arranged at intervals along a fixed direction in a strict sense, but that a certain angle deviation relative to the width direction Y is allowed.

[0066] It can be understood that the rear floor assembly 100 refers to a component that is at least partially located at the bottom of the trunk of the vehicle and plays a load-bearing role.

[0067] In some examples, along the length direction X, the middle portion of the transverse beam member 200 protrudes away from the rear floor assembly 100 to form an arc-shaped member, and such a configuration can more effectively disperse the collision force F and exert a better buffering effect. In this case, in order to facilitate the energy absorbing member 300 to be attached and connected to the arc-shaped transverse beam member 200, the connection surface of the energy absorbing member 300 and the transverse beam member 200 will be adapted to the arc-shaped surface of the transverse beam member 200, so as to ensure the stability of the connection.

[0068] In some examples, the cross section of the transverse beam member 200 perpendicular to its extension direction is in the shape of a Chinese character "日", which can improve the crushing energy absorption capacity of the transverse beam member 200 and thus better absorb the collision energy.

[0069] In some examples, the transverse beam member 200 is an aluminum alloy extruded profile, which has high integration, good lightness, and good crush energy absorption effect.

[0070] In some examples, the transverse beam member 200 is connected to the energy absorbing member 300 by welding, so as to ensure the connection strength between the energy absorbing member 300 and the transverse beam member 200. Exemplarily, the partition 310 close to the transverse beam member 200 is in close contact with the transverse beam member 200 and welded.

[0071] In some examples, the partition 310 is a plate-like structure with thickness, and the thickness direction of the partition 310 may be parallel to the length direction X or form an acute angle with the length direction X. This can facilitate the deformation of the partition 310 under force.

[0072] In some examples, the crush part 320 is a plate-like structure with a thickness. The thickness direction of the crush part 320 can be parallel to the width direction Y or form an acute angle with the width direction Y. In this way, when the crush part 320 is subjected to the collision force F, the collision force F will be transmitted along the plate surface direction of the crush part 320. Thus, the crush part 320 can provide a better crush energy absorption effect.

[0073] In some examples, the number of the partition parts 310 is at least three. In this way, along the length direction X, the crush parts 320 between the multiple partition parts 310 can form a multi-stage crush energy absorption structure to absorb the collision energy step by step.

[0074] In some examples, the multiple partition parts 310 and the multiple crush parts 320 are an integrally formed structure. This can improve the overall structural strength of the multiple partition parts 310 and the multiple crush parts 320 to enhance the crush energy absorption ability of the energy absorption member 300.

[0075] In some examples, the number of the partition parts 310 is three, and the number of the crush parts 320 between any adjacent partition parts 310 is four. This can not only ensure the overall light weight of the energy absorption member 300, but also ensure the crush energy absorption effect of the energy absorption member 300.

[0076] Through the above settings, the rear floor assembly 100, the transverse beam member 200 and the energy absorption member 300 form the rear body assembly 1. When the rear body assembly 1 is impacted, the transverse beam member 200 will be first subjected to the collision force F, and then the collision force F is transmitted to the rear floor assembly 100 through the energy absorption member 300. During the transmission of the collision force F, the transverse beam member 200, the energy absorption member 300 and the rear floor assembly 100 can all absorb a part of the force, thereby reducing the collision force F transmitted to the front side of the rear body assembly 1 and improving the safety of the personnel in the cockpit located on the front side of the rear body assembly 1.

[0077] Since the energy absorption member 300 includes multiple partition parts 310 and multiple crush parts 320, after the rear part of the rear body assembly 1 receives the collision force F, along the length direction X of the vehicle body, the collision force F will be alternately transmitted between the multiple partition parts 310 and the multiple crush parts 320 in turn. During the transmission process, the partition parts 310 and the crush parts 320 will deform to buffer the collision force F, so as to achieve the effect of crush energy absorption. The energy absorption member 300 with such a structure has a good energy absorption and buffering effect and can effectively improve the anti-collision ability of the rear body assembly 1.

[0078] In some embodiments, such as Figures 4 - 8As shown, the rear floor assembly 100 includes a rear floor member 110 and two longitudinal beam members 120. The longitudinal beam member 120 is connected to one side of the rear floor member 110 close to the transverse beam member 200 and extends along the length direction X. The two longitudinal beam members 120 are arranged at intervals along the width direction Y. An energy absorbing member 300 is arranged between the longitudinal beam member 120 and the transverse beam member 200.

[0079] In some examples, the rear floor member 110 is an integral die-casting. The rear floor member 110 configured in this way has the advantages of high integration, light weight, and high structural strength.

[0080] In some examples, the cross section of the longitudinal beam member 120 perpendicular to its extension direction is in the shape of a Chinese character “日”, which can improve the crushing energy absorption effect of the longitudinal beam member 120 .

[0081] In some examples, such as Figures 4 - 8 As shown, the rear floor component 110 includes a connected rear floor body 111 and two plate groups 112. The rear floor component 110 is connected to the longitudinal beam component 120 through the plate group 112. The plate group 112 includes a first plate body 1121, a second plate body 1122 and a third plate body 1123. Around the extension direction of the longitudinal beam component 120, the first plate body 1121, the second plate body 1122 and the third plate body 1123 are arranged in sequence and are all connected to the longitudinal beam component 120. Around the extension direction of the longitudinal beam component 120, an opening a is formed between the first plate body 1121 and the third plate body 1123, and the opening a can allow the longitudinal beam component 120 to enter or leave the space enclosed by the first plate body 1121, the second plate body 1122 and the third plate body 1123.

[0082] In this way, the arrangement of the plate group 112 can not only facilitate the installation and disassembly of the longitudinal beam component 120, but the first plate body 1121, the second plate body 1122 and the third plate body 1123 can also provide support and connection for the longitudinal beam component 120 from multiple directions, thereby improving the connection strength of the longitudinal beam component 120, thereby improving the anti-collision ability here.

[0083] Exemplarily, the longitudinal beam member 120 may be connected to the first plate body 1121 , the second plate body 1122 , and the third plate body 1123 respectively by welding, bolt connection, or FDS (Flow Drill Screw) connection.

[0084] Exemplarily, along the width direction Y, the openings a of the two plate groups 112 corresponding to the two longitudinal beam members 120 face in directions away from each other, which can facilitate installation and disassembly of the two longitudinal beam members 120 .

[0085] For example, the rear floor member 110 is detachably connected to the longitudinal beam member 120 through a plate group 112. In this way, when the cross beam member 200, the longitudinal beam member 120, and the energy absorption member 300 are damaged in a collision and need to be replaced, the cross beam member 200, the longitudinal beam member 120, and the energy absorption member 300 can be disassembled and replaced as a whole through the plate group 112. This effectively improves the collision maintainability of the whole vehicle, reduces the maintenance cost, and provides a good customer experience.

[0086] Exemplarily, on opposite sides of the rear floor body 111 along the width direction Y, there are multiple reinforcing ribs arranged in a crisscross pattern, and the multiple reinforcing ribs form a honeycomb structure, which can increase the energy absorption performance of the rear floor body 111 during collapse.

[0087] Exemplarily, along the length direction X, the honeycomb structures on the cross beam member 200, the energy absorption member 300, the longitudinal beam member 120, and the rear floor body 111 are arranged in sequence. In this way, along the length direction X, the collision force F will be transmitted through the honeycomb structures on the cross beam member 200, the energy absorption member 300, the longitudinal beam member 120, and the rear floor body 111 in sequence, so as to achieve multi-stage collapse energy absorption and ensure the overall energy absorption effect of the rear body assembly 1.

[0088] In some examples, the energy absorption member 300 is connected to the cross beam member 200 and the longitudinal beam member 120 by welding respectively. This can ensure the flatness of the connection position and the connection strength.

[0089] With the above settings, since the energy absorption member 300 is arranged between the cross beam member 200 and the longitudinal beam member 120, the collision force F received by the cross beam member 200 will be transmitted to the longitudinal beam member 120 through the energy absorption member 300, and then transmitted to the rear floor member 110, thereby realizing multi-stage collapse energy absorption of the collision force F. The space between the two longitudinal beam members 120 can not only provide space for the deformation of the cross beam member 200, so as to facilitate the removal of the collision force F received by the cross beam member 200, but also control the overall weight of the rear floor assembly 100 and ensure lightweight design.

[0090] In some embodiments, as Figures 4 - 6 shown, the rear floor assembly 100 further includes a transverse strengthening member 130. The transverse strengthening member 130 is connected between the two longitudinal beam members 120 and extends along the width direction Y. The cross section of the transverse strengthening member 130 perpendicular to its extending direction is a groove-like structure.

[0091] Wherein, the notch of the groove-like structure can face upward, downward, leftward or rightward. It can be specifically selected and set according to needs.

[0092] In addition, the transverse strengthening member 130 can be made of hot-formed steel.

[0093] In some examples, such as Figures 8 - 12 shown, in the height direction Z of the vehicle body, the recessed portion of the groove-like structure is located on the lower side of the longitudinal beam member 120. In this way, sufficient space can be reserved above the groove-like structure, which is convenient for arranging other structures above the groove-like structure.

[0094] In some examples, the number of the transverse strengthening members 130 is multiple, and the multiple transverse strengthening members 130 are sequentially arranged at intervals along the length direction X. In this way, the multiple transverse strengthening members 130 can all play the role of strengthening the mutual acting force between the two longitudinal beam members 120 in the width direction Y, thereby ensuring the structural strength.

[0095] Exemplarily, such as Figure 6 shown, the number of the transverse strengthening members 130 is two. In this way, along the length direction X, the rear floor member 110, an adjacent transverse strengthening member 130, and the two longitudinal beam members 120 form a first frame M1, the rear floor member 110, the other transverse strengthening member 130, and the two longitudinal beam members 120 form a second frame M2, and the rear floor member 110, the transverse beam member 200, and the two longitudinal beam members 120 form a third frame M3. The first frame M1, the second frame M2, and the third frame M3 can serve as three energy absorption areas. In this way, the anti-collision ability of the rear assembly 1 of the vehicle body can be greatly improved. During a collision, the three energy absorption areas can absorb energy and relieve the force layer by layer.

[0096] In some examples, such as Figures 8 - 12 shown, along the width direction Y, first lapping portions 131 are provided at both ends of the transverse strengthening member 130, a second lapping portion 121 is connected to the longitudinal beam member 120, and a third lapping portion 1124 is connected to the plate group 112. Along the height direction Z, the first lapping portion 131 on the transverse strengthening member 130 close to the transverse beam member 200 laps on the second lapping portion 121, and the connection between the transverse strengthening member 130 close to the transverse beam member 200 and the plate group 112 is realized through the lapping of the first lapping portion 131 and the second lapping portion 121. The first lapping portion 131 on the transverse strengthening member 130 close to the rear floor member 110 laps on the third lapping portion 1124, and the connection between the transverse strengthening member 130 and the longitudinal beam member 120 is realized through the lapping of the first lapping portion 131 and the third lapping portion 1124. In this way, the stability and convenience of the connection can be ensured.

[0097] Among them, the connection method in which the first lapping portion 131 laps on the second lapping portion 121 can be welding or screw connection. The connection method in which the first lapping portion 131 laps on the third lapping portion 1124 can be welding or screw connection.

[0098] Exemplarily, along the height direction Z, the second overlapping portion 121 is provided at the bottom edge of the longitudinal beam member 120, and the concave portion of the trough-shaped structure is located below the first overlapping portion 131. Thus, after the first overlapping portion 131 overlaps on the second overlapping portion 121, the concave portion of the trough-shaped structure can be located below the longitudinal beam member 120. Similarly, along the height direction Z, the third overlapping portion 1124 is provided at the bottom edge of the plate group 112, and the concave portion of the trough-shaped structure is located below the first overlapping portion 131. Thus, after the first overlapping portion 131 overlaps on the third overlapping portion 1124, the concave portion of the trough-shaped structure can be located below the longitudinal beam member 120 and the plate group 112.

[0099] Through the above arrangement, the transverse strengthening member 130 can increase the mutual acting force between the two longitudinal beam members 120 in the width direction Y, thereby ensuring the structural strength. Since the cross-section of the transverse strengthening member 130 perpendicular to its extending direction is a trough-shaped structure, not only the weight of the transverse strengthening member 130 is reduced, but also the area enclosed by the cross-section of the transverse strengthening member 130 is ensured, thereby ensuring the structural strength of the transverse strengthening member 130 and its anti-collision ability.

[0100] In some embodiments, as Figures 13 - 19 shown, the rear body assembly 1 further includes a strengthening member 400. The strengthening member 400 is arranged along the circumferential direction of the longitudinal beam member 120. The strengthening member 400 extends from the peripheral wall surface of the longitudinal beam member 120 towards the direction close to the energy absorption member 300 and away from the longitudinal beam member 120, and a buffer cavity b is formed between the strengthening member 400 and the intersection of the energy absorption member 300 and the longitudinal beam member 120. The strengthening member 400 abuts against the side of the energy absorption member 300 facing away from the transverse beam member 200 and is connected to the longitudinal beam member 120.

[0101] It can be understood that, as Figure 13 shown, the strengthening member 400 being arranged along the circumferential direction of the longitudinal beam member 120 means that the strengthening member 400 is arranged around the extending direction of the longitudinal beam member 120.

[0102] In some examples, as Figures 14 - 17As shown, the reinforcing member 400 includes a plurality of reinforcing portions 410. The plurality of reinforcing portions 410 are sequentially arranged along the circumferential direction of the longitudinal beam member 120. Each reinforcing member 400 extends from the circumferential wall surface of the longitudinal beam member 120 towards the energy absorption member 300 and away from the longitudinal beam member 120, and a sub-cavity is formed between the intersection of the energy absorption member 300 and the longitudinal beam member 120. The plurality of sub-cavities constitute the buffer cavity b, and each reinforcing portion 410 abuts against the side of the energy absorption member 300 facing away from the transverse beam member 200 and is connected to the longitudinal beam member 120. Such an arrangement can facilitate the processing, production and setting of the reinforcing member 400, facilitate the connection between the reinforcing portion 410 and the longitudinal beam member 120, and facilitate the abutment between the reinforcing portion 410 and the energy absorption member 300.

[0103] Exemplarily, one reinforcing member 400 includes four reinforcing portions 410. The four reinforcing portions 410 include two first reinforcing portions 411 and two second reinforcing portions 412. Along the height direction Z, there is one first reinforcing portion 411 on each side of the longitudinal beam member 120, and along the width direction Y, there is one second reinforcing portion 412 on each side of the longitudinal beam member 120. In this way, the energy absorption member 300 can be abutted from four directions of up, down, left and right to provide sufficient support for the energy absorption member 300, and the number of the reinforcing portions 410 can also be controlled to achieve lightweight design on the basis of ensuring the abutment strength.

[0104] Exemplarily, along the width direction Y, the sub-cavity formed by the first reinforcing portion 411 is provided in a through manner. Since when the energy absorption member 300 is subjected to the collision force F, the collision force F mainly acts on the first reinforcing member 400, making the sub-cavity formed by the first reinforcing portion 411 through can increase the volume of the triangular sub-cavity, thereby providing a sufficient support effect. Along the vertical direction, the sub-cavity formed by the second reinforcing portion 412 is only located in the middle position of the second reinforcing portion 412, which can also provide a certain degree of support effect.

[0105] In some other examples, the reinforcing member 400 extends one week along the circumferential direction of the longitudinal beam member 120. This can also provide sufficient support for the energy absorption member 300.

[0106] In some examples, such as Figure 3 、 Figures 14 - 17As shown, the rear body assembly 1 further includes a transfer member 500. The transfer member 500 is disposed between the energy absorption member 300 and the longitudinal beam member 120. The transfer member 500 includes a first transfer plate 510 and a second transfer plate 520. Along the length direction X, the first transfer plate 510 and the second transfer plate 520 are arranged in sequence and are attached and connected. The first transfer plate 510 is disposed close to the energy absorption member 300, and the second transfer plate 520 is disposed close to the longitudinal beam member 120. The first transfer plate 510 is connected to the energy absorption member 300, and the second transfer plate 520 is connected to the longitudinal beam member 120. The reinforcing member 400 abuts against the side of the second transfer plate 520 facing away from the first transfer plate 510. The cross-section of the first transfer plate 510 perpendicular to the length direction X and the cross-section of the second transfer plate 520 perpendicular to the length direction X are both larger than the cross-section of the energy absorption member 300 perpendicular to the length direction X.

[0107] With such an arrangement, the connection between the longitudinal beam member 120 and the energy absorption member 300 can be achieved through the connection of the first transfer plate 510 and the second transfer plate 520. In addition, since the cross-sections of the first transfer plate 510 and the second transfer plate 520 are both larger than the cross-section of the energy absorption member 300, the contact area between the energy absorption member 300 and the longitudinal beam member 120 can be ensured through the arrangement of the first transfer plate 510 and the second transfer plate 520, thereby ensuring the stability of the transmission of the collision force F and the stability of energy absorption.

[0108] In this case, the buffer cavity b is formed between the intersection of the second transfer plate 520 and the longitudinal beam member 120 and the reinforcing member 400.

[0109] In some examples, as Figures 17 - 19 shown, the second transfer plate 520 has a first clamping plate 521 and a second clamping plate 522. Along the height direction Z, the first clamping plate 521 and the upper first reinforcing portion 411 are clamped on opposite sides of the upper side wall plate of the longitudinal beam member 120, and fasteners such as screws sequentially pass through the upper first reinforcing portion 411, the upper side wall plate of the longitudinal beam member 120, and the first clamping plate 521 to realize the connection of the second transfer plate 520, the upper first reinforcing portion 411, and the longitudinal beam member 120. Along the height direction Z, the second clamping plate 522 and the lower first reinforcing portion 411 are clamped on opposite sides of the lower side wall plate of the longitudinal beam member 120, and fasteners such as screws sequentially pass through the lower first reinforcing portion 411, the lower side wall plate of the longitudinal beam member 120, and the second clamping plate 522 to realize the connection of the second transfer plate 520, the lower first reinforcing portion 411, and the longitudinal beam member 120. With such an arrangement, the connection stability can be ensured.

[0110] With the above settings, along the length direction X, the reinforcement member 400 can provide backward support for the energy absorption member 300. Thus, when the energy absorption member 300 is subjected to a forward collision force F, the reinforcement member 400 can improve the setting stability of the energy absorption member 300. Since the buffer cavity b has a triangular cross-section perpendicular to the radial direction of the longitudinal beam member 120, it can provide more sufficient support for the energy absorption member 300. Moreover, due to the existence of the buffer cavity b, it can provide a certain buffer space for the deformation of the energy absorption member 300, thereby further improving the crash energy absorption effect.

[0111] The structural form of the energy absorption member 300 is diverse, and the structure of the energy absorption member 300 will be introduced in detail below.

[0112] Among them, the collapsible part 320 in the energy absorption member 300 can be a flat plate-like structure, an irregular three-dimensional structure, or the collapsible part 320 can also be a structure with its middle protruding towards one side in the width direction Y. The following is a specific introduction.

[0113] In some embodiments, as Figure 20 shown, the middle part of the collapsible part 320 in the length direction X protrudes towards one side in the width direction Y.

[0114] In some examples, along the length direction X and pointing from the rear of the vehicle body towards the front, the collapsible part 320 includes a first sub-part 321, a protruding part 322, and a second sub-part 323 connected in sequence. The protruding part 322 protrudes towards one side relative to the first sub-part 321 and the second sub-part 323 in the width direction Y. Thus, the collision force F on the transverse beam member 200 will be transmitted to the separator, and then transmitted to the collapsible part 320. On the collapsible part 320, the collision force F will pass through the first sub-part 321, the protruding part 322, and the second sub-part 323 in sequence. When the collision force F passes through the protruding part 322, the protruding part 322 will guide the collision force F, so that the protruding part 322 deforms towards one side in the width direction Y. Thus, it can facilitate the collapsible part 320 to unload the force through deformation.

[0115] Exemplarily, along the height direction Z, the protruding part 322 extends from one end of the first sub-part 321 to the other end of the first sub-part 321. Thus, in the height direction Z, the crash energy absorption effect of the collapsible part 320 can be ensured.

[0116] Exemplarily, the protruding part 322 has a circular cross-section perpendicular to the height direction Z. Thus, it can facilitate the transmission of the collision force F, and the collapsible part 320 undergoes a collapsible deformation, thereby facilitating the absorption of the collision force F, and thus improving the crash energy absorption effect of the collapsible part 320.

[0117] Of course, the cross-section of the protruding part 322 perpendicular to the height direction Z can also be triangular, square or other shapes, or the cross-section of the protruding part 322 perpendicular to the height direction Z can also be an irregular shape.

[0118] With the above settings, when the collision force F is transmitted to the crush section 320, since the middle part of the crush section 320 along the length direction X protrudes to one side along the width direction Y and there is space on one side of the crush section 320 along the width direction Y, the crush section 320 can deform through the space on the side along the width direction Y to relieve the force, so that the collision force F gradually decreases during the transmission process, thereby enabling the energy-absorbing member 300 to achieve a good crush energy-absorbing effect.

[0119] In some embodiments, as Figure 20 shown, the multiple crush sections 320 between any adjacent partition sections 310 include a first crush section 32a. Along the length direction X, the first crush sections 32a between any two adjacent partition sections 310 are arranged in sequence, and the middle parts of any adjacent first crush sections 32a protrude in opposite directions along the length direction X.

[0120] That is to say, the protruding directions of the protruding parts 322 in any adjacent first crush sections 32a are opposite.

[0121] It can be understood that the first crush section 32a is one of the multiple crush sections 320. Here, naming and distinguishing with the first crush section 32a is only for the convenience of subsequent description. In addition, since the first crush sections 32a between any two adjacent partition sections 310 are arranged in sequence along the length direction X, it can be explained that the number of partition sections 310 is at least three. For the convenience of understanding, the following description of this application will be described by taking the number of partition sections 310 as three as an example.

[0122] Exemplarily, when observing from the rear of the vehicle body to the front of the vehicle body, along the length direction X, the first crush section 32a close to the energy-absorbing member 300 protrudes to the left, and the first crush section 32a close to the rear floor assembly 100 protrudes to the right.

[0123] Or, when observing from the rear of the vehicle body to the front of the vehicle body, along the length direction X, the first crush section 32a close to the energy-absorbing member 300 protrudes to the right, and the first crush section 32a close to the rear floor assembly 100 protrudes to the left.

[0124] With the above settings, since the first crush sections 32a between any two adjacent partition sections 310 are arranged in sequence and the middle parts of any adjacent first crush sections 32a protrude in opposite directions, during the transmission process of the collision force F, along the length direction X, the guiding directions of the adjacent first crush sections 32a for the collision force F are opposite, so that a better crush energy-absorbing effect can be achieved.

[0125] In some embodiments, as Figure 20As shown, the multiple crush portions 320 between any two adjacent partition portions 310 further include a second crush portion 32b disposed adjacent to the first crush portion 32a. Between the same adjacent partition portions 310, the middle portion of the first crush portion 32a along the length direction X and the middle portion of the second crush portion 32b along the length direction X protrude in opposite directions, and the first crush portion 32a and the second crush portion 32b close to the transverse beam member 200 protrude in directions away from each other, and the first crush portion 32a and the second crush portion 32b close to the rear floor assembly 100 protrude in directions approaching each other.

[0126] With the above arrangement, since the first crush portion 32a and the second crush portion 32b close to the transverse beam member 200 protrude in directions away from each other, while the first crush portion 32a and the second crush portion 32b close to the rear floor assembly 100 protrude in directions approaching each other, the first space e1 between the first crush portion 32a and the second crush portion 32b close to the transverse beam member 200 is larger than the second space e2 between the first crush portion 32a and the second crush portion 32b close to the rear floor assembly 100. The first space e1 can provide a larger deformation space than the second space e2. Then, in the direction from the rear of the vehicle body to the front, the first space e1 and the second space e2 can provide a gradually decreasing energy absorption effect, so that the energy absorption member 300 can exert a better crush energy absorption effect.

[0127] Of course, in some other embodiments, the protruding directions of the middle portions of the multiple crush portions 320 between the same adjacent partition portions 310 along the length direction X can be the same. Further, the protruding directions of the middle portions of all the crush portions 320 between any two adjacent partition portions 310 along the length direction X are the same.

[0128] In some embodiments, as Figure 20 shown, the multiple crush portions 320 between any two adjacent partition portions 310 further include a third crush portion 32c. Along the width direction Y, both sides of the first crush portion 32a and the second crush portion 32b that are away from each other have a third crush portion 32c. Among the two adjacent partition portions 310 close to the rear floor assembly 100, the two adjacent partition portions 310, the adjacent third crush portion 32c, and the first crush portion 32a enclose a first buffer space c, and the two adjacent partition portions 310, the adjacent third crush portion 32c, and the second crush portion 32b enclose a second buffer space d. The energy absorption member 300 further includes an inclined portion 330. The inclined portion 330 is inclinedly supported in at least one of the first buffer space c and the second buffer space d, and the inclined direction of the inclined portion 330 intersects both the width direction Y and the length direction X.

[0129] Wherein, the third crush portion 32c can be a flat plate structure, or the third crush portion 32c can also protrude to one side along the width direction Y at the middle portion along the length direction X.

[0130] In some examples, when observing from the rear of the vehicle body towards the front of the vehicle body, the third crush section 32c adjacent to the first crush section 32a and the adjacent partition section 310 intersect at a first intersection point k1 and a second intersection point k2 in sequence. The first crush section 32a and the adjacent partition section 310 intersect at a third intersection point k3 and a fourth intersection point k4 in sequence. The diagonal section 330 provided in the first buffer space c is the first diagonal section 331. The first diagonal section 331 extends from the first intersection point k1 to the fourth intersection point k4. Since the first diagonal section 331 divides the first buffer space c into a triangular first buffer sub-space c1 and a triangular second buffer sub-space c2, and the triangular structure has good stability, good support can be provided, so that the first buffer space c has good stability.

[0131] Of course, the first diagonal section 331 can also extend from the third intersection point k3 to the second intersection point k2.

[0132] In some examples, when observing from the rear of the vehicle body towards the front of the vehicle body, the third crush section 32c adjacent to the second crush section 32b and the adjacent partition section 310 intersect at a fifth intersection point k5 and a sixth intersection point k6 in sequence. The second crush section 32b and the adjacent partition section 310 intersect at a seventh intersection point k7 and an eighth intersection point k8 in sequence. The diagonal section 330 provided in the second buffer space d is the second diagonal section 332. The second diagonal section 332 extends from the fifth intersection point k5 to the eighth intersection point k8, so as to support the fifth intersection point k5 and the eighth intersection point k8 by means of the second diagonal section 332. Since the second diagonal section 332 divides the second buffer space d into a triangular third buffer sub-space d1 and a triangular fourth buffer sub-space d2, and the triangular structure has good stability, good support can be provided, so that the second buffer space d has good stability.

[0133] Of course, the second diagonal section 332 can also extend from the seventh intersection point k7 to the sixth intersection point k6.

[0134] Through the above designs of the first diagonal section 331 and the second diagonal section 332, not only sufficient support is provided for the first buffer space c and the second buffer space d, but also along the length direction X, when the collision force F is transmitted to the middle partition section 310, the collision force F can continue to be transmitted through the first crush section 32a, the second crush section 32b, the two third crush sections 32c, the first diagonal section 331 and the second diagonal section 332. That is to say, there are six paths for the transmission of the collision force F, so that the collision force F can be effectively dispersed, and thus the collision force F can be effectively absorbed.

[0135] With the above settings, the diagonal portion 330 can improve the structural stability of the first buffer space c and / or the second buffer space d, thereby improving the structural strength of the portion of the energy absorber 300 close to the rear floor assembly 100, and thus improving the energy absorption effect of the portion of the energy absorber 300 close to the rear floor assembly 100, so as to improve the overall crash energy absorption effect of the energy absorber 300.

[0136] In some embodiments, as Figure 20 shown, the diagonal portions 330 in the first buffer space c and the diagonal portions 330 in the second buffer space d have opposite tilting trends.

[0137] In some examples, the first diagonal portion 331 extends from the first intersection point k1 to the fourth intersection point k4, and the second diagonal portion 332 extends from the fifth intersection point k5 to the eighth intersection point k8. Thus, when observing from the rear of the vehicle body towards the front of the vehicle body, the extension lines of the first diagonal portion 331 and the second diagonal portion 332 form a V-like shape, and the opening a of the V faces backward. In this way, relatively symmetric supports can be provided for the first buffer space c and the second buffer space d in the length direction X, thereby ensuring the balance of energy absorption on the relatively two sides of the energy absorber 300 in the length direction X.

[0138] In some other examples, the first diagonal portion 331 extends from the second intersection point k2 to the third intersection point k3, and the second diagonal portion 332 extends from the sixth intersection point k6 to the seventh intersection point k7. Thus, when observing from the rear of the vehicle body towards the front of the vehicle body, the extension lines of the first diagonal portion 331 and the second diagonal portion 332 form a V-like shape, and the opening a of the V faces forward. In this way, relatively symmetric supports can be provided for the first buffer space c and the second buffer space d in the length direction X, thereby ensuring the balance of energy absorption on the relatively two sides of the energy absorber 300 in the length direction X.

[0139] With the above settings, the diagonal portions 330 in the first buffer space c and the diagonal portions 330 in the second buffer space d are approximately symmetric or symmetrically arranged with respect to the length direction X. In this way, the approximate nature of the crash energy absorption effect on both sides of the energy absorber 300 in the length direction X can be ensured, so as to improve the overall crash energy absorption effect of the energy absorber 300.

[0140] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present application.

Claims

1. A rear body assembly, characterized in that, Comprising: A rear floor assembly; A transverse beam member disposed at the rear side of the rear floor assembly along the length direction of the vehicle body and arranged along the width direction of the vehicle body; An energy-absorbing member connected between the rear floor assembly and the transverse beam member; the energy-absorbing member includes a plurality of partition portions and a plurality of crush portions, the plurality of partition portions are spaced along the length direction, and a plurality of the crush portions are provided between any two adjacent partition portions, the crush portions are respectively connected to the adjacent partition portions, and the plurality of crush portions are spaced along the width direction.

2. The rear body assembly according to claim 1, characterized in that, The middle part of the crush portion along the length direction protrudes to one side along the width direction.

3. The rear body assembly according to claim 2, characterized in that, The plurality of crush portions between any two adjacent partition portions include a first crush portion; Along the length direction, the first crush portions between any two adjacent partition portions are arranged in sequence, and the middle parts of any two adjacent first crush portions protrude in opposite directions along the length direction.

4. The rear body assembly according to claim 3, wherein, The plurality of crush portions between any two adjacent partition portions further include a second crush portion adjacent to the first crush portion; Between the same adjacent partition portions, the middle part of the first crush portion along the length direction and the middle part of the second crush portion along the length direction protrude in opposite directions, and the first crush portion and the second crush portion close to the transverse beam member protrude in opposite directions, and the first crush portion and the second crush portion close to the rear floor assembly protrude in directions close to each other.

5. The rear body assembly according to claim 4, characterized in that, The plurality of crush portions between any two adjacent partition portions further include: a third crush portion, and the third crush portion is provided on both sides of the first crush portion and the second crush portion that are opposite to each other along the width direction; Among two adjacent partition portions close to the rear floor assembly, the two adjacent partition portions, the adjacent third crush portion, the first crush portion enclose a first buffer space, and the two adjacent partition portions, the adjacent third crush portion, and the second crush portion enclose a second buffer space; The energy-absorbing member further includes an inclined portion, and the inclined portion is inclined and supported in at least one of the first buffer space and the second buffer space, and the inclination direction of the inclined portion intersects both the width direction and the length direction.

6. The rear body assembly according to claim 5, wherein The inclined portions in the first buffer space and the second buffer space have opposite inclination trends.

7. The rear body assembly according to any one of claims 1-6, characterized in that, The rear floor assembly includes: A rear floor member; Two longitudinal beam members connected to one side of the rear floor member close to the transverse beam member and extending along the length direction, and the two longitudinal beam members are spaced along the width direction; The energy-absorbing member is provided between the longitudinal beam member and the transverse beam member.

8. The rear body assembly according to claim 7, characterized in that, The rear floor assembly further includes a transverse strengthening member connected between the two longitudinal beam members and extending along the width direction; The cross-section of the transverse strengthening member perpendicular to its extending direction is a groove-like structure.

9. The rear body assembly according to claim 7, wherein, The rear vehicle body assembly further includes a strengthening member arranged along the circumferential direction of the longitudinal beam member; The reinforcing member extends from the peripheral wall surface of the longitudinal beam member towards the direction close to the energy-absorbing member and away from the longitudinal beam member, and a buffer cavity is formed between the reinforcing member and the intersection of the energy-absorbing member and the longitudinal beam member. The reinforcing member is respectively connected to the energy-absorbing member and the longitudinal beam member.

10. A vehicle, characterized in that, It includes the rear body assembly according to any one of claims 1-9.

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