Pure flat rear vehicle body module and vehicle

Abstract

The invention belongs to the technical field of vehicle structure design and manufacturing, and particularly relates to a flat-panel rear vehicle body module and a vehicle. The invention discloses a flat-panel rear vehicle body module with a low ground clearance. The flat-panel rear vehicle body module comprises a rear floor assembly and a rear anti-collision beam assembly, the rear floor assembly comprises a rear floor panel and a rear floor beam frame assembly; the rear anti-collision beam assembly comprises a rear anti-collision beam body and an energy absorption box assembly. The rear anti-collision beam body is connected to the side, away from the rear floor assembly, of the energy absorption box assembly. The rear floor beam frame assembly comprises a rear floor longitudinal beam which is supported on the rear floor panel in the Z direction, and a first cavity is formed in the rear floor longitudinal beam; the energy absorption box assembly is higher than the rear floor longitudinal beam in the Z direction, a second cavity is formed in the energy absorption box assembly, and the first cavity and the second cavity are arranged to partially coincide in the Z direction.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle structure design and manufacturing, and in particular, relates to a flat rear body module and a vehicle. Background Art

[0002] Regarding the common front and rear floor step problem in existing vehicles, this phenomenon is often caused by the discontinuity and non-flat characteristics of the front and rear floor panel design. In particular, there is often a significant step under the rear seats (such as Figure 1 As shown in the figure, this design directly leads to the increase of the height of the rear floor assembly from the ground, which limits the vertical height of the interior space and reduces the utilization of the space.

[0003] Therefore, an ultra-low and flat front and rear floor structure is currently designed. However, the applicant has found in actual application that the current ultra-low and flat front and rear floor structure, such as when the rear floor longitudinal beam height is designed to be 340-380mm, is too low from the ground during a corresponding collision; especially when a low-speed collision occurs, the rear structure of the vehicle cannot effectively absorb and disperse the collision energy, thereby failing to meet the safety requirements of the vehicle in a rear low-speed collision. At this time, key components such as the rear bumper, sensors, and lighting may suffer serious damage.

[0004] Therefore, the vehicle structure in the prior art still has some limitations in the design of the rear chassis module, based on which the present application is proposed. Summary of the invention

[0005] In order to solve the above problems, it is necessary to develop a more flexible rear chassis module structural design to optimize vehicle space and reduce the height of the rear cargo compartment from the ground to better realize cargo loading and unloading. At the same time, a structure with an optimized force transmission path can be provided on this basis to improve the vehicle's safety and maintenance economy in low-speed collisions.

[0006] According to one aspect of the present application, a pure flat rear body module with low ground clearance is provided, comprising a rear floor assembly and a rear anti-collision beam assembly; the rear floor assembly comprises a rear floor panel and a rear floor beam assembly; the rear anti-collision beam assembly comprises a rear anti-collision beam body and an energy absorption box assembly, wherein the rear anti-collision beam body is connected to a side of the energy absorption box assembly facing away from the rear floor assembly; the rear floor beam assembly comprises a rear floor longitudinal beam supported on the rear floor panel in the Z direction, wherein the rear floor longitudinal beam contains a first cavity; the energy absorption box assembly is higher than the rear floor longitudinal beam in the Z direction and contains a second cavity, wherein the first cavity and the second cavity are arranged to partially overlap in the Z direction.

[0007] In a further solution of the present application, the flat rear body module also includes a rear panel assembly, which is arranged between the rear floor assembly and the rear anti-collision beam assembly; wherein, the rear panel assembly includes a rear panel inner panel module and a rear panel outer panel module, and the rear panel outer panel module is arranged between the rear floor assembly and the energy absorption box assembly.

[0008] In a further solution of the present application, the reinforcing bracket includes a connecting portion and a supporting portion, the connecting portion is connected to the rear anti-collision beam body, and the supporting portion extends in the Z direction away from the rear anti-collision beam body.

[0009] In a further solution of the present application, the abutting portion is arranged obliquely, and an end portion of the abutting portion along the X direction protrudes from the energy absorbing box assembly or is flush with the energy absorbing box assembly.

[0010] In a further scheme of the present application, the rear floor assembly also includes an anti-collision beam reinforcement plate connected to the rear floor panel and the rear floor beam frame assembly; the rear anti-collision beam reinforcement plate includes a reinforcing cross plate and a reinforcing vertical plate, the reinforcing cross plate extends in a direction away from the rear anti-collision beam assembly and is connected to the rear floor assembly, the reinforcing vertical plate is arranged along the Z direction and is connected to the rear panel assembly, and the highest point of the reinforcing vertical plate is higher than the energy absorption box assembly.

[0011] In a further solution of the present application, the rear anti-collision beam assembly also includes a mounting plate, which is connected to one end of the energy absorption box assembly away from the rear anti-collision beam body; a first screw hole is provided on the reinforcing vertical plate; a first mounting hole corresponding to the first screw hole is provided on the mounting plate; wherein the rear panel outer panel module is provided between the mounting plate and the reinforcing vertical plate.

[0012] In a further scheme of the present application, the mounting plate protrudes in the Z-upward portion beyond the rear anti-collision beam body and a second mounting hole is provided in the protruding portion; the rear floor beam frame assembly also includes a rear connecting plate of the rear longitudinal beam, one end of the rear connecting plate of the rear longitudinal beam is connected to the end of the rear floor longitudinal beam, and the other end is parallel to the mounting plate and is provided with a second screw hole corresponding to the second mounting hole; wherein, the rear panel outer panel module is arranged between the mounting plate and the rear connecting plate of the rear longitudinal beam.

[0013] In a further scheme of the present application, the rear anti-collision beam body includes a collision portion and a connecting portion; the collision portion includes a fitting section connected to the end face of the energy absorption box assembly, and a collision section protruding in the X direction, and the collision section is located on the upper side of the fitting section; the collision portion and the connecting portion are enclosed and formed to form a groove facing the energy absorption box assembly, and the energy absorption box assembly is embedded in the groove.

[0014] In a further embodiment of the present application, the flat rear body module further includes fasteners, which include bolts and gaskets; one bolt passes through the first screw hole and the first mounting hole respectively, and is fastened by the gasket; the other bolt passes through the second screw hole and the second mounting hole respectively, and is fastened by the gasket.

[0015] In a further solution of the present application, the flat rear body module also includes a rear bumper, which is arranged on a side of the rear anti-collision beam body away from the energy absorption box assembly.

[0016] In a second aspect of the present application, a vehicle is also provided, comprising the above flat rear body module.

[0017] Based on a general inventive concept of an embodiment of the present invention, specifically, the present invention provides a pure flat rear body module with low ground clearance, the rear chassis module includes a rear floor assembly and a rear anti-collision beam assembly; the rear floor assembly includes a rear floor panel and a rear floor beam assembly; the rear anti-collision beam assembly includes a rear anti-collision beam body and an energy absorption box assembly, the rear anti-collision beam body is connected to the side of the energy absorption box assembly away from the rear floor assembly; the rear floor beam assembly includes a rear floor longitudinal beam supported on the rear floor panel in the Z direction, and the rear floor longitudinal beam has a first cavity; the energy absorption box assembly is higher than the rear floor longitudinal beam in the Z direction and has a second cavity inside, wherein the first cavity and the second cavity are arranged to partially overlap in the Z direction; the scheme has at least the following beneficial effects:

[0018] Through the above design, the effective collision height of the energy absorption box assembly can be increased based on the flat floor of the ultra-low cargo platform. The first cavity of the energy absorption box assembly and the second cavity of the rear floor longitudinal beam partially overlap in the Z direction, making the entire rear chassis module more continuous in structure. When the rear of the vehicle is hit, the rear anti-collision beam assembly can quickly and effectively transfer the collision force to the rear floor beam frame assembly. Ensure that the collision force can be quickly dispersed to the entire chassis structure instead of being concentrated and squeezed in a specific place, thereby significantly improving the stability and safety of the vehicle after the collision; especially for low-speed collisions, it can avoid damage and failure of key components such as the rear bumper, sensors and lighting, and improve the economic efficiency of maintenance.

[0019] Other features and advantages of the embodiments of the present application will be described in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the structure of a vehicle exemplified by the present invention;

[0022] Figure 2 This is a schematic axial view of a flat rear body module provided by an embodiment of the present invention;

[0023] Figure 3 A cross-sectional view of a flat rear body module provided by an embodiment of the present invention at AA;

[0024] Figure 4 A schematic structural diagram of a rear anti-collision beam assembly provided by an embodiment of the present invention;

[0025] Figure 5 It is an enlarged schematic diagram of a point P in a flat rear vehicle body module provided by an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the structure of a reinforcement bracket provided by an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of the structure of an anti-collision beam reinforcement plate provided in an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of the structure of a mounting plate provided by an embodiment of the present invention;

[0029] Fig. 9 A cross-sectional view of a flat rear body module and a collision device provided by an embodiment of the present invention.

[0030] The reference numerals are as follows:

[0031] 100. Rear body module;

[0032] 10. Rear floor assembly;

[0033] 11. Rear floor panel; 121. Rear floor longitudinal beam; 122. Rear connecting plate of rear longitudinal beam;

[0034] 12. Rear floor beam assembly;

[0035] 13. Anti-collision beam reinforcement plate; 131. Reinforced horizontal plate; 132. Reinforced vertical plate; 133. Second reinforcement rib;

[0036] 20. Rear anti-collision beam assembly;

[0037] 21. Anti-collision beam body; 211. Collision portion; 212. Connection portion; 2111. Lamination section; 2112. Collision section;

[0038] 22. Energy absorption box assembly;

[0039] 23. Reinforcement bracket; 231. Connecting portion; 232. Abutting portion; 233. First reinforcing rib;

[0040] 24. Mounting plate;

[0041] 30. Rear panel assembly;

[0042] 31. Rear panel inner panel module; 32. Rear panel outer panel module;

[0043] 40. Fasteners;

[0044] 41. bolt; 42. gasket;

[0045] 50. Rear bumper. DETAILED DESCRIPTION

[0046] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear to indicate the orientation or position relationship, unless otherwise specified, they are understood to be based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0047] In addition, if there is a feature defined as "first" or "second", it is only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Features defined as "first" or "second" may explicitly or implicitly include at least one of the defined features. If there is a description of "plurality", the general meaning is to include at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and so on should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In the description of this specification, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0050] like Figures 1 to 3 The embodiment of the present invention first provides a rear body module 100 with a low ground clearance. The flat rear body module 100 of the flat vehicle adopts a completely flat floor structure at the front and rear, allowing the interior space of the vehicle to be maximized. The low ground clearance can make the cargo platform of the vehicle lower, and the cargo can be loaded and unloaded more conveniently.

[0051] Based on the premise that the rear body module 100 is flat and has a low ground clearance, this embodiment is proposed:

[0052] The rear body module 100 includes a rear floor assembly 10 and a rear anti-collision beam assembly 20. The rear floor assembly 10 is one of the main load-bearing structures of the rear body module. It extends from the middle of the vehicle body to the rear of the vehicle. It supports the weight of the rear of the vehicle, including passengers, cargo, etc. The rear anti-collision beam assembly 20 is located at the rear end of the vehicle and is used to provide protection when the vehicle is rear-ended.

[0053] In the embodiment of the present invention, the rear floor assembly 10 includes a rear floor panel 11 and a rear floor beam assembly 12; the rear floor panel 11 is the supporting part of the rear floor assembly 10, and is usually used to carry seats, passengers, etc. The rear floor beam assembly 12 is the bottom support and peripheral reinforcement of the rear floor panel 11, that is, used to support the rear floor and enhance the rigidity and strength of the rear floor panel 11 at the peripheral side.

[0054] like Figure 2 In one exemplary embodiment, the rear floor beam assembly 12 is respectively arranged on both sides of the rear floor panel 11 along the Y direction and the bottom along the Z direction. The beams on both sides along the Y direction increase the lateral rigidity and stability of the rear floor, preventing deformation caused by uneven road surface or lateral force during driving. The bottom beam along the Z direction increases the longitudinal rigidity and load-bearing capacity of the rear floor, and also provides a connection point with other chassis components of the vehicle (such as the suspension system, transmission system, etc.).

[0055] like Figure 3 as well as Figure 4The rear anti-collision beam assembly 20 includes a rear anti-collision beam body 21 and an energy absorption box assembly 22. The rear anti-collision beam body 21 is connected to the side of the energy absorption box assembly 22 away from the rear floor assembly 10, ensuring that the rear anti-collision beam can effectively play its role when a collision occurs, while avoiding excessive impact on the rear floor assembly.

[0056] Based on a general inventive concept of an embodiment of the present invention, the rear floor beam assembly 12 includes a rear floor longitudinal beam 121 supported on the rear floor panel 11 in the Z direction, and the rear floor longitudinal beam 121 has a first cavity A; the energy absorption box assembly 22 is higher than the rear floor longitudinal beam 121 in the Z direction and has a second cavity B inside, wherein the first cavity A and the second cavity B are arranged to partially overlap in the Z direction.

[0057] It should be noted that the X direction, Z direction, etc. mentioned in this article are all described based on the vehicle body coordinate system as a reference. For example, the X direction is usually parallel to the vehicle's forward direction (this article only describes the direction without distinguishing between positive and negative), and the Z direction is the height direction.

[0058] It can be understood that the rear floor longitudinal beam 121 supports the rear floor panel 11 in the Z direction (i.e., the vertical direction) to ensure the stability and load-bearing capacity of the entire rear floor structure. The interior of the rear floor longitudinal beam 121 is designed as a first cavity A, which means that the rear floor longitudinal beam 121 has a certain thickness in the Z direction and a hollow design, so that it can not only be used to reduce weight and achieve lightweight, but also can be used to install certain functional components or arrange wiring harnesses.

[0059] The interior of the energy absorption box assembly 22 is designed as a second cavity B. The first cavity A and the second cavity B mentioned above partially overlap in the Z direction, that is, the first cavity A and the second cavity B are staggered, and the second cavity B is higher than the first cavity A. This design can increase the ground clearance of the energy absorption box assembly 22; ensuring that when a rear-end collision occurs, the energy absorption box assembly 22 can first contact the collision object and absorb the collision energy. The energy absorption box assembly 22 and the rear floor longitudinal beam 121 are structurally continuous, and the collision force can be dispersed along the rear floor longitudinal beam 121 to the entire chassis structure, rather than concentrated in a specific area, thereby significantly improving the stability and safety of the vehicle after the collision; especially for low-speed collisions, it can avoid damage and failure of key components such as the rear bumper, sensors, and lighting, and improve the economic efficiency of maintenance.

[0060] Continue reading Figure 1 In the embodiment of the present invention, the flat rear vehicle body module 100 further includes a rear panel assembly 30, which is disposed between the rear floor assembly 10 and the rear anti-collision beam assembly 20. Specifically, the rear panel assembly 30 includes a rear panel inner panel module 31 and a rear panel outer panel module 32, which is disposed between the rear floor assembly 10 and the energy absorption box assembly 22.

[0061] That is, the rear panel assembly 30 forms an upright plate-like structure at the rear end of the rear floor panel 11 in the X direction, and the rear panel assembly 30 can realize the installation of the rear anti-collision beam assembly 20; and together with the rear floor beam frame assembly 12, a complete surrounding structure is formed, which increases the structural rigidity of the rear part of the vehicle. At the same time, the rear floor assembly 10 and the rear anti-collision beam assembly 20 are tightly connected to both sides of the rear panel assembly 30, forming a stable and strong frame, which can effectively absorb the impact energy in a low-speed collision and improve the torsional rigidity of the lower part of the D-pillar.

[0062] like Figure 3 , Figure 5 as well as Figure 6 The rear anti-collision beam assembly 20 further includes a reinforcement bracket 23, which is connected to the rear anti-collision beam body 21 to further increase the collision height of the rear anti-collision beam body 21;

[0063] In a specific solution, the reinforcing bracket 23 is designed to be an L-shaped bend, which includes a connecting portion 231 and a supporting portion 232. The connecting portion 231 is connected to the upper side of the rear anti-collision beam body 21 by welding or screwing to ensure the stability between the reinforcing bracket 23 and the rear anti-collision beam body 21. The supporting portion 232 extends in the Z direction (i.e., the vertical direction of the vehicle) in the direction away from the rear anti-collision beam body 21. This design is intended to increase the height of the rear anti-collision beam body 21 in the Z direction. In this way, it is ensured that the rear anti-collision beam body 21 has an overlap with the collision object when a rear collision occurs. The height is increased by reinforcing the bracket 23, rather than by increasing the cross-section of the energy absorption box or the cross-section of the rear anti-collision beam body 21, so as to achieve a lightweight structure.

[0064] As a preferred solution of the embodiment of the present invention, the abutting portion 232 is inclined, and its inclination direction is inclined outward away from the energy absorbing box assembly 22 as shown in the figure; when a collision occurs, due to the inclined characteristics of the inclined abutting portion 232, the collision force can first act on the abutting portion 232, and cause it to bend and collapse in the direction of the rear floor assembly 10. In this process, the abutting portion will absorb and disperse part of the energy generated by the collision, thereby reducing the impact of the collision on the vehicle structure. Furthermore, the end of the abutting portion 232 along the X direction protrudes from the energy absorbing box assembly 22 or is flush with the energy absorbing box assembly 22. When a collision occurs, the abutting portion 232 first contacts the collision object, and then guides the collision force to be transmitted to the energy absorbing box assembly 22. This ensures that the energy absorbing box can more effectively exert its energy absorption function, further improving the collision performance of the entire rear anti-collision beam assembly 20.

[0065] In an optional solution in the embodiment of the present invention, the reinforcing bracket 23 also includes a first reinforcing rib 233, which is respectively arranged on the side surfaces of the connecting portion 231 and the supporting portion 232 along the Y direction, and can improve the bending and twisting resistance of the reinforcing bracket 23.

[0066] like Figure 3 and Figure 7 In a further scheme of the embodiment of the present invention, the rear floor assembly 10 also includes an anti-collision beam reinforcement plate 13 connected to the rear floor panel 11 and the rear floor beam frame assembly 12; the rear anti-collision beam reinforcement plate 13 is also L-shaped, and includes a reinforcing transverse plate 131 and a reinforcing vertical plate 132, the reinforcing transverse plate 131 extends in a direction away from the rear anti-collision beam assembly 20 and is connected to the rear floor assembly 10, the reinforcing vertical plate 132 is arranged along the Z direction and is connected to the rear panel assembly 30, and the highest point of the reinforcing vertical plate 132 is higher than the energy absorption box assembly 22.

[0067] Furthermore, second reinforcing ribs 133 are further provided on both sides of the reinforcing transverse plate 131 and the reinforcing vertical plate 132 along the Y direction to improve the structural strength of the anti-collision beam reinforcing plate 13 .

[0068] When the energy absorption box assembly 22 absorbs the collision force, the reinforcing vertical plate 132 can absorb and buffer the force by bending, and then transmit the force to other parts of the vehicle body through the rear floor beam assembly 12 and the rear floor panel 11. This transmission path can effectively reduce the degree of damage to the vehicle structure caused by the collision and reduce the damage to the occupants.

[0069] like Figure 3 , Figure 7 as well as Figure 8 In a further solution of the embodiment of the present invention, the rear anti-collision beam assembly 20 further includes a mounting plate 24, which is connected to one end of the energy absorption box assembly 22 away from the rear anti-collision beam body 21, so as to provide support and fixing points for the entire rear anti-collision beam assembly 20. Through the mounting plate 24, the rear anti-collision beam assembly can be more firmly mounted on the vehicle body (i.e., the rear floor assembly 10 and the rear panel assembly 30), thereby improving the structural rigidity and collision safety of the entire vehicle.

[0070] The reinforcing vertical plate 132 is provided with a first screw hole a1; the mounting plate 24 is provided with a first mounting hole a2 corresponding to the first screw hole; wherein the rear panel outer plate module 32 is provided between the mounting plate 24 and the reinforcing vertical plate 132. The rear panel outer plate module 32 can be clamped between the mounting plate 24 and the reinforcing vertical plate 132 and fixed by bolts or other fasteners, so as to improve the installation stability of the rear panel outer plate module 32, and also help optimize the vehicle body structure and improve the torsional rigidity.

[0071] The rear floor beam assembly 12 further includes a rear longitudinal beam rear connecting plate 122, one end of which is connected to the end of the rear floor longitudinal beam 121, and the other end is parallel to the mounting plate 24 and is provided with a first screw hole b1 corresponding to the second mounting hole b2; the mounting plate 24 partially protrudes from the rear anti-collision beam body 21 in the Z direction, and the second mounting hole b2 is provided at the protruding portion; this enables the mounting plate 24 to be accurately aligned and connected with the rear longitudinal beam rear connecting plate 122 of the rear floor beam assembly 12. One end of the rear longitudinal beam rear connecting plate 122 is connected to the end of the rear floor longitudinal beam 121, and the other end is parallel to the mounting plate 24, and is provided with a first screw hole b1 corresponding to the second mounting hole b2. The rear floor longitudinal beam 121 can be firmly connected to the mounting plate 24 by passing bolts or other fasteners through these corresponding mounting holes. Through the above design, the rear floor longitudinal beam 121 is just connected to the mounting plate 24 correspondingly and the first cavity A and the second cavity B are partially overlapped. This allows the two cavities to work together during a collision to more effectively absorb and disperse the collision energy.

[0072] Likewise, the rear panel outer panel module 32 is disposed between the mounting plate 24 and the rear longitudinal beam rear connecting plate 122 , further enhancing the rigidity and stability of the entire structure.

[0073] Continue reading Figure 3 as well as Figure 4 In a preferred embodiment of a rear anti-collision beam body 21 provided by the present invention, the rear anti-collision beam body 21 includes a collision portion 211 and a connecting portion 212; the collision portion 211 includes a fitting section 2111 connected to the end surface of the energy absorption box assembly 22, and a collision section 2112 protruding from the fitting section 2111 in the X direction, and the collision section 2112 is located on the upper side of the fitting section 2111; wherein the collision section 2112 is more likely to contact with the collision object during a collision, thereby increasing the contact height of the collision, and the protruding setting can provide a buffering effect, which helps to better disperse the collision force.

[0074] Furthermore, the collision portion 211 and the connection portion 212 are enclosed and combined to form a groove C facing the energy absorption box assembly 22, and the energy absorption box assembly 22 is embedded in the groove C. The groove C provides a precise positioning and installation position for the energy absorption box assembly 22. When the energy absorption box assembly 22 is embedded in the groove C, the connection between the two is more stable. At the same time, the design of the groove C makes the rear anti-collision beam body 21 more compact in the X direction, reducing the length of the vehicle body and achieving lightweight.

[0075] In an optional manner, the flat rear body module further includes a fastener 40, which includes a bolt 41 and a gasket 42; one of the bolts 41 passes through the first screw hole a and the first mounting hole b, respectively, and is fastened by the gasket 42; the other bolt 41 passes through the second screw hole a and the second mounting hole b, respectively, and is fastened by the gasket 42. Through the cooperation of the bolt 41 and the gasket 42, a stable connection between the rear floor assembly 10 and the rear anti-collision beam assembly 20 is achieved, and it is ensured that they can withstand large tension and shear forces, and the convenience of disassembly of the rear anti-collision beam assembly 20 is taken into account, thereby improving the maintenance economy.

[0076] like Fig. 9 The flat rear body module also includes a rear bumper 50, which is arranged on the side of the rear anti-collision beam body 21 away from the energy absorption box assembly 22. When a minor collision occurs to the vehicle, due to its rear-mounted design, the rear bumper 50 can bear and disperse the collision force in the first place, effectively reducing the direct damage to the rear of the vehicle caused by the collision. And through the above arrangement, by strengthening the collision force absorption and conduction from the bracket 23, the anti-collision beam body 21, the energy absorption box assembly 22 to the rear floor assembly 10, it responds quickly when a collision occurs, effectively absorbs and disperses the collision force, and can protect the rear bumper, sensors, lighting and other key components from damage to the greatest extent.

[0077] In this diagram, the "low ground clearance" mentioned above may refer to the height of the rear floor panel 11 from the ground L1; in the embodiment of the present invention, it may be 340 mm to 380 mm. The collision height L2 (optionally 450 mm) of the collision object is simulated by the collision device. Through the above design, the reinforcing bracket 23 can completely overlap the collision height, and the collision force can be transmitted more directly and efficiently through the reinforcing bracket 23, thereby achieving efficient collision force transmission and excellent collision performance for the flat rear floor vehicle with low ground clearance. This helps to improve the safety and stability of the vehicle and reduce maintenance costs.

[0078] Those skilled in the art should understand that if all or part of the parts of the flat rear body module 100 involved in the various products provided in the embodiments of the present invention are combined or replaced by simple changes, mutual conversions, etc., such as moving the positions of the components; or setting the products they constitute as one; or designing them to be detachable; it also falls within the protection scope of the present invention.

[0079] In another aspect of the present application, a vehicle is provided, which includes the above-mentioned pure flat rear body module 100; obviously, the vehicle has all the beneficial effects brought by the above-mentioned pure flat rear body module 100. For example, the design optimizes the spatial layout of the vehicle, reduces the ground clearance, has efficient collision force transmission and excellent collision performance, and has light weight, etc. Of course, the vehicle also has other advantages brought by the above-mentioned pure flat rear body module 100, which will not be repeated here one by one.

[0080] The various technical features described above can be combined arbitrarily. Although all possible combinations of these technical features are not described, any combination of these technical features should be considered to be covered by this specification as long as there is no contradiction in such combination.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still adjust the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these adjustments or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A flat rear body module with low ground clearance, It is characterized in that Including rear floor assembly and rear anti-collision beam assembly; The rear floor assembly includes a rear floor panel and a rear floor beam assembly; The rear anti-collision beam assembly includes a rear anti-collision beam body and an energy absorption box assembly, wherein the rear anti-collision beam body is connected to a side of the energy absorption box assembly away from the rear floor assembly; The rear floor beam assembly includes a rear floor longitudinal beam supported on the rear floor panel in the Z direction, and the rear floor longitudinal beam has a first cavity inside; the energy absorption box assembly is higher than the rear floor longitudinal beam in the Z direction and has a second cavity inside, wherein the first cavity and the second cavity are configured to partially overlap in the Z direction.

2. The flat rear body module according to claim 1, It is characterized in that The flat rear body module further includes a rear panel assembly, which is arranged between the rear floor assembly and the rear anti-collision beam assembly; Wherein, the rear panel assembly includes a rear panel inner panel module and a rear panel outer panel module, and the rear panel outer panel module is arranged between the rear floor assembly and the energy absorption box assembly.

3. The flat rear body module according to claim 2, It is characterized in that The rear anti-collision beam assembly also includes a reinforcing bracket, which includes a connecting portion and a supporting portion. The connecting portion is connected to the rear anti-collision beam body, and the supporting portion extends in the Z direction away from the rear anti-collision beam body.

4. The flat rear body module according to claim 3, It is characterized in that The rear floor assembly also includes an anti-collision beam reinforcement plate connected to the rear floor panel and the rear floor beam frame assembly; The rear anti-collision beam reinforcement plate includes a reinforcement transverse plate and a reinforcement vertical plate. The reinforcement transverse plate extends in a direction away from the rear anti-collision beam assembly and is connected to the rear floor assembly. The reinforcement vertical plate is arranged along the Z direction and is connected to the rear panel assembly, and the highest point of the reinforcement vertical plate is higher than the energy absorption box assembly.

5. The flat rear body module according to claim 4, It is characterized in that The rear anti-collision beam assembly further includes a mounting plate, wherein the mounting plate is connected to an end of the energy absorption box assembly away from the rear anti-collision beam body; The reinforcing vertical plate is provided with a first screw hole; the mounting plate is provided with a first mounting hole corresponding to the first screw hole; Wherein, the rear panel outer panel module is arranged between the mounting plate and the reinforcing vertical plate.

6. The flat rear body module according to claim 5, It is characterized in that The mounting plate partially protrudes from the rear anti-collision beam body in the Z direction and a second mounting hole is provided in the protruding portion; The rear floor beam frame assembly further includes a rear longitudinal beam rear connecting plate, one end of which is connected to the end of the rear floor longitudinal beam, and the other end of which is parallel to the mounting plate and is provided with a second screw hole corresponding to the second mounting hole; Wherein, the rear panel outer panel module is arranged between the mounting plate and the rear connecting plate of the rear longitudinal beam.

7. The flat rear body module according to claim 1, It is characterized in that The rear anti-collision beam body includes a collision portion and a connection portion; the connection portion is connected to the energy absorption box assembly; The collision portion includes a fitting section connected to the end surface of the energy absorption box assembly, and a collision section protruding from the fitting section in the X direction, and the collision section is located on the upper side of the fitting section; The collision portion and the connection portion are combined to form a groove facing the energy absorption box assembly, and the energy absorption box assembly is embedded in the groove.

8. The flat rear body module according to claim 5, It is characterized in that The flat rear body module further includes a fastener, wherein the fastener includes a bolt and a washer; One of the bolts passes through the first screw hole and the first mounting hole respectively, and is fastened by the gasket; Another bolt passes through the second screw hole and the second mounting hole respectively and is fastened by the gasket.

9. The flat rear body module according to claim 1, It is characterized in that The flat rear body module further comprises a rear bumper, which is arranged on a side of the rear anti-collision beam body away from the energy absorption box assembly.

10. A vehicle, It is characterized in that Comprising a flat rear body module according to any one of claims 1 to 9.

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