Rear floor structure, rear floor assembly and vehicle

Abstract

The invention discloses a rear floor structure, a rear floor assembly and a vehicle. The rear floor structure comprises a longitudinal beam section, a first cross beam, a suspension connecting support set and a plurality of swing arm connecting support sets which are integrally formed. The longitudinal beam section comprises a first longitudinal beam and a second longitudinal beam, and the first cross beam is connected between the first longitudinal beam and the second longitudinal beam; the multiple swing arm connecting support sets are distributed on the longitudinal beam sections at intervals in the length direction of the vehicle. Each swing arm connecting support set comprises a pair of swing arm mounting supports symmetrically arranged on the first longitudinal beam and the second longitudinal beam. The suspension connecting support set comprises a third suspension mounting support, a first suspension mounting support and a second suspension mounting support, the first suspension mounting support and the second suspension mounting support are arranged on the first longitudinal beam and the second longitudinal beam respectively, and the third suspension mounting support is connected between the two swing arm mounting supports of one swing arm connecting support set. The first longitudinal beam, the second longitudinal beam and the first cross beam define a closed frame structure. The number of structural parts can be reduced on the premise that the function of the rear floor is met, and the production cost is reduced.

Description

Technical Field

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

[0002] The rear floor structure of a vehicle generally refers to the part of the vehicle body floor behind the passenger compartment. While carrying the various components in the rear floor assembly, it also absorbs energy in collisions, transfers energy, and provides sufficient rigidity for the vehicle body frame. Traditional conventional vehicles are usually front-wheel drive, and their rear floor structures are usually connected to non-independent suspensions. With the improvement of people's quality of life, the rear suspension systems of conventional vehicles have also begun to adopt independent suspensions to further buffer the impact of various uneven roads on the frame or body and improve the riding experience of drivers and passengers. However, when the rear suspension of the vehicle is an independent suspension or the drive form is rear-wheel drive, due to the process limitations of traditional sheet metal parts stamping, there are dual limitations of insufficient rigidity and insufficient precision at the installation point. In order to meet the effective installation of the independent suspension on the vehicle body, the relevant technology can only design a rear subframe on the independent suspension layout to provide installation points for the swing arm and the engine suspension, and then assemble the rear subframe and the rear floor structure together through bolts and other connection methods to solve the above two problems.

[0003] However, in the related art, the conventional rear floor structure involves a large number of parts and various connection types. Multiple parts are connected and assembled through various connection methods such as welding, screwing, and gluing. Not only is the structure complex and the connection levels deep, but the connection accuracy is low and quality control is difficult. At the same time, the conventional rear subframe is large in size and heavy in weight. Combining the two on this basis is not only cumbersome and time-consuming in production and assembly, the process cycle is lengthy, and the manufacturing cost is high, but also the cumulative tolerance of part dimensions is large, and there are defects such as stress concentration, resulting in poor overall stiffness performance and low safety performance of the vehicle. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide a rear floor structure, a rear floor assembly and a vehicle, which can meet the performance requirements of the integrated arrangement of rear subframe functional parts in the rear floor structure and reduce production costs.

[0005] According to one aspect of an embodiment of the present application, a rear floor structure is provided, which is an integrally formed part and includes: a longitudinal beam section, which includes a first longitudinal beam and a second longitudinal beam, which extend in the vehicle length direction and are spaced apart in the vehicle width direction; a first cross beam, which extends in the vehicle width direction and is connected to the first longitudinal beam and the second longitudinal beam at both ends in the vehicle width direction; a swing arm connecting bracket group suitable for connecting a suspension system, wherein the swing arm connecting bracket group is provided with a plurality of groups, and the plurality of groups of swing arm connecting bracket groups are spaced apart in the vehicle length direction; wherein each group of swing arm connecting bracket groups includes a pair of swing arm mounting brackets, and each pair of swing arm mounting brackets extends along the vehicle width direction. The third suspension mounting bracket is arranged between one group of swing arm connecting bracket groups on the side away from the first cross beam, and extends to both ends along the width direction of the vehicle to two swing arm mounting brackets connected to the group of swing arm connecting bracket groups, so as to enclose with the first longitudinal beam, the second longitudinal beam and the first cross beam to form a closed frame structure suitable for installing the suspension system and the suspension system.

[0006] In an exemplary embodiment of the present application, the swing arm connecting bracket group includes a first swing arm connecting bracket group, a second swing arm connecting bracket group, a third swing arm connecting bracket group and a fourth swing arm connecting bracket group, and the first swing arm connecting bracket group, the second swing arm connecting bracket group, the third swing arm connecting bracket group and the fourth swing arm connecting bracket group are distributed in sequence from front to rear along the length direction of the vehicle; wherein, the first swing arm connecting bracket group and the third swing arm connecting bracket group are extended downward along the height direction of the vehicle, so that the positions of the first swing arm connecting bracket group and the third swing arm connecting bracket group in the height direction of the vehicle are lower than the second swing arm connecting bracket group and the fourth swing arm connecting bracket group; the third suspension mounting bracket is correspondingly connected to the third swing arm connecting bracket group.

[0007] In an exemplary embodiment of the present application, the third swing arm connecting bracket group includes a pair of third swing arm mounting brackets, the third swing arm mounting bracket includes a first connecting portion and a third swing arm mounting seat, the first connecting portion extends toward the longitudinal beam section on its side to form a first end portion, and the first end portion is connected to the lower end surface and the inner end surface of the longitudinal beam section; the first connecting portion extends inwardly along the vehicle width direction and downwardly along the vehicle height direction to form a second end portion, and the third swing arm mounting seat is connected to the second end portion; the first connecting portion forms a third end portion toward another third swing arm mounting bracket on the opposite side, and the third end portion is located at the connection between the first end portion and the second end portion; the third suspension mounting bracket includes a second connecting portion and a third suspension mounting seat, the second connecting portion extends along the vehicle width direction, the third suspension mounting seat is located in the middle of the second connecting portion and connected below the second connecting portion; the second connecting portion is connected to the third ends of the third swing arm mounting brackets on both sides at both ends in the vehicle width direction.

[0008] In an exemplary embodiment of the present application, the third suspension mounting bracket also includes a third connecting portion, which is extended along the vehicle width direction and connected to the bottom of the third suspension mounting seat corresponding to the second connecting portion; the third connecting portion is respectively connected to the third swing arm mounting seats of the third swing arm mounting brackets on both sides at both ends in the vehicle width direction.

[0009] In an exemplary embodiment of the present application, the fourth swing arm connecting bracket group includes a pair of fourth swing arm mounting brackets, the fourth swing arm mounting bracket includes a fourth connecting part, a fifth connecting part and a fourth swing arm mounting seat, one end of the fourth connecting part is connected to the longitudinal beam section on its side, and the other end extends downward along the vehicle height direction to a height position corresponding to the third end portion; one end of the fifth connecting part is connected to the other end of the fourth connecting part, and the other end of the fifth connecting part extends inward along the vehicle width direction to a position corresponding to the third end portion, and bends forward along the vehicle length direction to extend to connect to the first connecting part; the fourth swing arm mounting seat is connected to the bending part of the fifth connecting part, and is arranged toward the inner side of the bending part.

[0010] In an exemplary embodiment of the present application, a stabilizer bar mounting seat is also connected to the lower end surface of the fourth connecting portion.

[0011] In an exemplary embodiment of the present application, the first swing arm connecting bracket group includes a pair of first swing arm mounting brackets, one end of the first swing arm mounting bracket is connected to the lower end surface of the longitudinal beam section on its side, and the other end is extended downward along the vehicle height direction, and the lower end of the first swing arm mounting bracket is connected to the first swing arm mounting seat; the second swing arm connecting bracket group includes a pair of second swing arm mounting brackets, one end of the second swing arm mounting bracket is connected to the longitudinal beam section on its side, and the other end is extended inward along the vehicle width direction, and the other end of the second swing arm mounting bracket is connected to the second swing arm mounting seat; wherein, the height position of the first swing arm mounting seat in the vehicle height direction corresponds to the third swing arm mounting seat, and the height position of the second swing arm mounting seat in the vehicle height direction corresponds to the fourth swing arm mounting seat.

[0012] In an exemplary embodiment of the present application, the first swing arm mounting bracket is also connected to a fifth swing arm mounting seat; the fifth swing arm mounting seat is connected to the middle part of the first swing arm mounting bracket and extends outward along the vehicle width direction; the first swing arm mounting seat is connected to the bottom of the fifth swing arm mounting seat.

[0013] In an exemplary embodiment of the present application, the rear floor structure also includes: a first wheel cover, which is formed on the upper end surface of the first longitudinal beam, and a first shock absorber mounting seat is provided in the first wheel cover, and first reinforcing ribs extend from the upper and lower sides of the first shock absorber mounting seat in the vehicle height direction, and the first reinforcing ribs extend upward to be connected to the upper end of the first wheel cover, and extend downward to be connected to the first longitudinal beam; and a second wheel cover, which is formed on the upper end surface of the second longitudinal beam corresponding to the first wheel cover, and a second shock absorber mounting seat is provided in the second wheel cover, and second reinforcing ribs extend from the upper and lower sides of the second shock absorber mounting seat in the vehicle height direction, and the second reinforcing ribs extend upward to be connected to the upper end of the second wheel cover, and extend downward to be connected to the second longitudinal beam; wherein the positions of the first shock absorber mounting seat and the second shock absorber mounting seat in the vehicle length direction correspond to the third suspension mounting bracket.

[0014] In an exemplary embodiment of the present application, the first crossbeam includes a crossbeam main section and a first support portion and a second support portion respectively formed at both ends of the crossbeam main section in the vehicle width direction; the first longitudinal beam includes a first connecting section and a first main section, one end of the first connecting section is connected to the first support portion, and the other end is connected to the first main section; the second longitudinal beam includes a second connecting section and a second main section, one end of the second connecting section is connected to the second support portion, and the other end is connected to the second main section; wherein the relative inner side profiles of the first support portion and the second support portion are first structural surfaces, and the first structural surfaces extend inwardly from bottom to top along the vehicle height direction to the lower end surface of the crossbeam main section; the relative outer side profiles of the first connecting section and the second connecting section are second structural surfaces, and the second structural surfaces extend outwardly from back to front along the vehicle length direction to the relative outer side surfaces of the first support portion and the second support portion.

[0015] According to a second aspect of an embodiment of the present application, a rear floor assembly is provided, comprising a second cross beam and any of the above-mentioned rear floor structures, wherein the second cross beam extends in the vehicle width direction, and the first longitudinal beam and the second longitudinal beam extend forward in the vehicle length direction until they extend beyond the first cross beam and are connected to both ends of the second cross beam in the vehicle width direction.

[0016] According to a third aspect of an embodiment of the present application, a vehicle is provided, comprising any one of the above-mentioned rear floor structures or the above-mentioned rear floor assembly.

[0017] The rear floor structure of the present application realizes the installation of left and right suspensions and part of the swing arms by arranging a suspension connecting bracket group and a swing arm connecting bracket group on the first longitudinal beam and the second longitudinal beam, and then connects the third suspension mounting bracket with one of the swing arm connecting bracket groups as a whole, so as to cooperate to realize the installation of the rear suspension and the swing arm there, thereby replacing the rear subframe to meet the installation requirements of the suspension system and the suspension system in the rear floor; at the same time, the third suspension mounting bracket and the swing arm mounting brackets on both sides of it are enclosed with the first longitudinal beam, the second longitudinal beam and the first cross beam to form an integrated closed frame structure, which can not only realize the effective transmission of torque and achieve the purpose of improving the overall structural strength, but also reduce the number of parts, improve the assembly efficiency of the whole vehicle, thereby reducing the production cost of the whole vehicle, shortening the development cycle of the whole vehicle, and facilitating the lightweighting of the vehicle body.

[0018] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of a rear floor assembly according to an embodiment of the present application is shown;

[0021] Figure 2 A schematic diagram of the upper structure of the rear floor assembly described in an embodiment of the present application is shown;

[0022] Figure 3 A schematic diagram of the lower structure of the rear floor assembly described in an embodiment of the present application is shown;

[0023] Figure 4 A structural schematic diagram of the rear floor structure according to an embodiment of the present application is shown;

[0024] Figure 5 A left side view of the rear floor structure according to an embodiment of the present application is shown;

[0025] Figure 6 A schematic diagram showing the connection of the rear floor assembly described in an embodiment of the present application within the vehicle is shown.

[0026] Description of Figure Numbers:

[0027] 1-longitudinal beam section, 11-first longitudinal beam, 111-first connecting section, 112-first main body section, 113 / 113'-second structural surface, 12-second longitudinal beam, 121-second connecting section, 122-second main body section,

[0028] 21-first crossbeam, 211-crossbeam main section, 212-first support portion, 213-second support portion, 214-first structural surface, 22-second crossbeam,

[0029] 3-Swing arm connecting bracket set,

[0030] 31-first swing arm connecting bracket group, 311-first swing arm mounting bracket, 3111-first swing arm mounting seat, 3112-fifth swing arm mounting seat,

[0031] 32-second swing arm connecting bracket set, 321-second swing arm mounting bracket, 3211-second swing arm mounting seat,

[0032] 33-third swing arm connecting bracket group, 331-third swing arm mounting bracket, 3311-first connecting portion, 33111-first end portion, 33112-second end portion, 33113-third end portion, 3312-third swing arm mounting seat, 3313-spring mounting seat,

[0033] 34-fourth swing arm connecting bracket group, 341-fourth swing arm mounting bracket, 3411-fourth connecting part, 3412-fifth connecting part, 3413-fourth swing arm mounting seat, 3414-stabilizer bar mounting seat,

[0034] 4-suspension connection bracket group, 41-first suspension mounting bracket, 42-second suspension mounting bracket, 43-third suspension mounting bracket, 431-second connecting portion, 432-third suspension mounting seat, 433-third connecting portion,

[0035] 51 - first wheel cover, 511 - first shock absorber mounting seat, 512 - first reinforcing rib, 52 - second wheel cover, 521 - second shock absorber mounting seat, 522 - second reinforcing rib.

[0036] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0038] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0039] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0040] like Figures 1 to 3 As shown, this embodiment provides a rear floor structure, which is an integrally formed part, including a longitudinal beam section 1, a first cross beam 21, a suspension connection bracket group 4 and a plurality of swing arm connection bracket groups 3; the longitudinal beam section 1 includes a first longitudinal beam 11 and a second longitudinal beam 12, and the first longitudinal beam 11 and the second longitudinal beam 12 are respectively arranged along the vehicle length direction ( Figure 1 The front-to-rear direction shown) extends in the vehicle width direction ( Figure 1The first cross beam 21 is extended along the width direction of the vehicle, and its two ends in the width direction of the vehicle are respectively connected to the first longitudinal beam 11 and the second longitudinal beam 12; the swing arm connecting bracket group 3 is suitable for connecting the swing arm or connecting rod of the suspension system, and the swing arm connecting bracket group 3 is provided with a plurality of groups, and the plurality of swing arm connecting bracket groups 3 are spaced apart along the length direction of the vehicle; wherein each group of the swing arm connecting bracket group 3 includes a pair of swing arm mounting brackets, and each pair of the swing arm mounting brackets is symmetrically arranged on the first longitudinal beam 11 and the second longitudinal beam 12 along the width direction of the vehicle; the suspension connecting bracket group 4 is suitable for connecting the suspension system, and the suspension connecting bracket group 4 includes a first suspension mounting bracket 41, a second suspension mounting bracket 42 and a third suspension mounting bracket 43, and the first suspension mounting bracket 41 and the second suspension mounting bracket 42 are respectively arranged on the side of the first longitudinal beam 11 and the second longitudinal beam 12 close to the first cross beam 21, so as to be suitable for connecting For the left suspension and the right suspension, the third suspension mounting bracket 43 is arranged between one group of swing arm connecting bracket groups 3 on the side away from the first cross beam 21, and extends to both ends along the width direction of the vehicle to the two swing arm mounting brackets connected to the group of swing arm connecting bracket groups 3, so as to realize the installation of the rear suspension. At the same time, the third suspension mounting bracket 43 and the swing arm mounting brackets on both sides thereof are enclosed in the horizontal plane with the first longitudinal beam 11, the second longitudinal beam 12 and the first cross beam 21 to form a closed frame structure suitable for installing the suspension system and the suspension system. In this way, not only the effective transmission of torque can be realized, but also the overall structural strength can be improved, so as to replace the rear subframe to meet the installation requirements of the suspension system and the suspension system in the rear floor; at the same time, the closed frame structure enclosed in the horizontal direction is an integrated molded part, which can effectively reduce the number of parts, improve the assembly efficiency of the whole vehicle, thereby shortening the development cycle of the whole vehicle and reducing the production cost of the whole vehicle.

[0041] It is understandable that the one-piece molding method of the rear floor structure mentioned above and in the following text can be formed by high-pressure integrated die-casting. The one-piece die-casting parts can effectively reduce the occurrence of defects such as pores and shrinkage holes by melting and casting in a high-pressure closed environment, thereby improving the density and strength of the rear floor structure. In this way, it is possible to reduce the number of parts and improve the assembly efficiency of the whole vehicle while ensuring that all performance requirements of the rear floor structure are met, thereby reducing the production cost of the whole vehicle, shortening the vehicle development cycle, and facilitating the lightweighting of the vehicle body.

[0042] It can also be understood that the number of the above-mentioned swing arm connection bracket groups, the spacing between adjacent swing arm connection bracket groups, and the structural length, height, width and shape of the swing arm mounting brackets in each swing arm connection bracket group can be designed and selected according to the suspension type, such as independent suspension in the form of double wishbone, multi-link, etc., and are not specifically limited here. The first suspension mounting bracket 41 and the second suspension mounting bracket 42 in the above-mentioned suspension connection bracket group 4 can be arranged correspondingly or symmetrically in the vehicle width direction on the side of the longitudinal beam section 1 close to the first cross beam 21, and the third suspension mounting bracket 43 is selected from one of the swing arm connection bracket groups 3 on the side of the longitudinal beam section 1 away from the first cross beam 21 for connection and arrangement, so as to form a three-point support structure with the first suspension mounting bracket 41 and the second suspension mounting bracket 42 and build a storage space suitable for accommodating structures such as the suspension system and the drive system, so as to meet the installation requirements of the suspension system or the drive system in the rear floor structure.

[0043] For example, Figures 1 to 3 As shown, the swing arm connecting bracket group 3 includes a first swing arm connecting bracket group 31, a second swing arm connecting bracket group 32, a third swing arm connecting bracket group 33 and a fourth swing arm connecting bracket group 34, and the first swing arm connecting bracket group 31, the second swing arm connecting bracket group 32, the third swing arm connecting bracket group 33 and the fourth swing arm connecting bracket group 34 are sequentially distributed from front to back along the length direction of the vehicle; wherein, the first swing arm connecting bracket group 31 and the third swing arm connecting bracket group 33 are arranged along the height direction of the vehicle ( Figure 1 The first swing arm connecting bracket group 31 and the third swing arm connecting bracket group 33 are arranged to extend downward in the vehicle height direction, so that the positions of the first swing arm connecting bracket group 31 and the third swing arm connecting bracket group 33 in the vehicle height direction are lower than the second swing arm connecting bracket group 32 and the fourth swing arm connecting bracket group 34; the third suspension mounting bracket 43 is connected to the third swing arm connecting bracket group 33 accordingly. In this way, by setting the first swing arm connecting bracket group 31 and the third swing arm connecting bracket group 33 downward in the vehicle height direction, the four swing arm connecting bracket groups are staggered up and down in a one-three, two-four arrangement, forming an avoidance space for the swing arm or connecting rod to move and for the installation of the suspension system, so as to meet the installation requirements of various types of independent suspensions.

[0044] In some embodiments, Figures 2 to 4As shown, the third swing arm connecting bracket group 33 includes a pair of third swing arm mounting brackets 331. Taking the third swing arm mounting bracket 331 on the side of the first longitudinal beam 11 as an example, the third swing arm mounting bracket 331 includes a first connecting portion 3311 and a third swing arm mounting seat 3312. The first connecting portion 3311 can be a box-type frame structure, the interior of which is hollowed out to reduce its own weight, and is provided with structural reinforcement ribs to improve structural strength; the third swing arm mounting seat 3312 can be an ear-type structure, by configuring mounting points on the ears on both sides and through bolts and bushings to achieve connection with the swing arm or connecting rod, and hollowing out the surface between the two mounting points to avoid the swing arm movement envelope; wherein the first connecting portion 3311 extends toward the longitudinal beam section 1 on its side, i.e., the first longitudinal beam 11 The first connecting portion 3311 extends inwardly along the vehicle width direction and downwardly along the vehicle height direction to form a second end portion 33112, and the third swing arm mounting seat 3312 is connected to the second end portion 33112 to realize the downward setting of the third swing arm connecting bracket group 33; the first connecting portion 3311 is formed with a third end portion 33113 toward another third swing arm mounting bracket 331 on the opposite side, i.e., the second longitudinal beam 12 side, and the third end portion 33113 is located at the connection between the first end portion 33111 and the second end portion 33112; the third suspension mounting bracket 331 is connected to the third swing arm mounting bracket 331 on the opposite side, i.e., the second longitudinal beam 12 side. The frame 43 includes a second connection portion 431 and a third suspension mounting seat 432. The second connection portion 431 can be a box-type frame structure, the interior of which is hollowed out to reduce its own weight, and is provided with structural reinforcement ribs to improve the structural strength; the third suspension mounting seat 432 can be a cylindrical structure with a sleeve to adapt to the installation of the suspension vibration damping bushing; wherein the second connection portion 431 is extended along the vehicle width direction, and the second connection portion 431 is connected to the third end portions 33113 of the third swing arm mounting brackets 331 on both sides at both ends in the vehicle width direction, so as to connect the third suspension mounting bracket 43 with the third swing arm mounting brackets 331 on both sides in the vehicle width direction as a whole, and then enclose the first longitudinal beam 11, the second longitudinal beam 12 and the first cross beam 21 to form a A closed frame structure suitable for installing the suspension system and the suspension system is formed, so as to achieve the purpose of improving the overall structural strength, load-bearing capacity and collision performance; at the same time, the third suspension mounting seat 432 is located in the middle of the second connecting part 431 and is connected to the bottom of the second connecting part 431. On the one hand, the load on the third suspension mounting seat 432 can be evenly transmitted to both sides. On the other hand, the second connecting part 431 is connected to the third end 33113, and the third suspension mounting seat 432 is located below the second connecting part 431, so that the overall position of the third suspension mounting bracket 43 in the vehicle height direction is below the longitudinal beam part, which not only provides more accommodating space for the suspension system and / or the drive system, but also reduces the probability of motion interference with the suspension system.Similarly, the structure and configuration of another third swing arm mounting bracket 331 on the side of the second longitudinal beam 12 is the same as above, and is symmetrically arranged along the width direction of the vehicle, which will not be repeated here.

[0045] Preferably, the structural reinforcement ribs in the first connection part 3311 and the structural reinforcement ribs in the second connection part 431 are correspondingly connected in the vehicle width direction, which can ensure the continuity of the force transmission path of the third suspension mounting bracket 43 and the third swing arm mounting brackets 331 on both sides of the vehicle width direction, thereby effectively improving the bearing capacity of the structure at this location.

[0046] Furthermore, if Figure 4 As shown, the third suspension mounting bracket 43 also includes a third connection part 433, which can be a box-type frame structure, the interior of which is hollowed out to reduce its own weight, and is equipped with structural reinforcement ribs to improve structural strength; the third connection part 433 is extended along the vehicle width direction, and is connected to the bottom of the third suspension mounting seat 432 corresponding to the second connection part 431, and the third connection part 433 is respectively connected to the third swing arm mounting seat 3312 of the third swing arm mounting bracket 331 on both sides at both ends in the vehicle width direction. In this way, the first connection part 3311, the second connection part 431 and the third connection part 433 can form a closed and complete frame structure, which not only ensures the strength and rigidity of the mounting point of the structure, but also improves the torsional rigidity of the rear floor structure and reduces the deformation risk of the rear floor structure.

[0047] It can be understood that when the second connection part 431 and the third connection part 433 are respectively arranged on the upper and lower sides of the third suspension mounting seat 432, two hollow structures are formed between the two on both sides of the third suspension mounting seat 432 along the width direction of the vehicle. In this way, on the one hand, the material consumption and the dead weight can be reduced, and on the other hand, wires and pipelines can be allowed to pass through the two hollow structures to facilitate the layout of the pipelines.

[0048] In some embodiments, Figures 2 to 4As shown, the fourth swing arm connecting bracket group 34 includes a pair of fourth swing arm mounting brackets 341. Taking the fourth swing arm mounting bracket 341 on the side of the first longitudinal beam 11 as an example, the fourth swing arm mounting bracket 341 includes a fourth connecting portion 3411, a fifth connecting portion 3412 and a fourth swing arm mounting seat 3413. The fourth connecting portion 3411 and the fifth connecting portion 3412 can both be box-type frame structures, the interior of which is hollowed out to reduce its own weight, and is configured with structural reinforcement ribs to improve structural strength; the fourth swing arm mounting seat 3413 can be an ear-type structure, by configuring mounting points on the ears on both sides and using bolts and bushings to achieve connection between the swing arm or the connecting rod, and the surface between the two mounting points is hollowed out to avoid the swing arm movement envelope. One end of the fourth connection part 3411 is connected to the longitudinal beam section 1 on its side, i.e., the first longitudinal beam 11, and the other end extends downward along the vehicle height direction to a height position corresponding to the third end 33113; one end of the fifth connection part 3412 is connected to the other end of the fourth connection part 3411, and the other end of the fifth connection part 3412 extends inward along the vehicle width direction to a position corresponding to the third end 33113, and bends forward along the vehicle length direction to connect to the first connection part 3311, specifically, the intersection of the first end 33111, the second end 33112 and the third end 33113 of the first connection part 3311; the fourth swing arm mounting seat 3413 is connected to the bending part of the fifth connection part 3412 and is arranged toward the inner side of the bending part. In this way, on the one hand, the load of the third swing arm mounting bracket 331 can be shared by the fourth swing arm mounting bracket 341, and on the other hand, two horizontal supports can be provided to the fourth swing arm mounting bracket 3413 to ensure the structural strength of the fourth swing arm mounting bracket 341. Similarly, the structure and configuration of another fourth swing arm mounting bracket 341 on the side of the second longitudinal beam 12 are the same as above, and are symmetrically arranged along the width direction of the vehicle, which will not be repeated here.

[0049] In some embodiments, Figure 3 As shown, based on the good structural strength of the double-supporting point structure of the fourth swing arm mounting bracket 341, the mounting point of the stabilizer bar, i.e., the stabilizer bar mounting seat 3414, can also be set on the fourth swing arm mounting bracket 341 to be suitable for connecting the stabilizer bar. Preferably, the stabilizer bar mounting seat 3414 is connected to the lower end surface of the fourth connecting portion 3411, and the fourth swing arm mounting seat 3413 can be constructed as a circular column structure recessed in the lower end surface of the fourth connecting portion 3411, and the connection of the stabilizer bar is achieved through bolts and connecting sheets; the circular column structure, i.e., the fourth swing arm mounting seat 3413, can be connected to the structural reinforcement ribs in the fourth connecting portion 3411 to improve its connection stability and force transmission effect.

[0050] In some embodiments, Figures 3 to 5As shown, the first swing arm connecting bracket group 31 includes a pair of first swing arm mounting brackets 311. Taking the first swing arm mounting bracket 311 on the side of the first longitudinal beam 11 as an example, the first swing arm mounting bracket 311 can be a box-type frame structure, the interior of which is hollowed out to reduce its own weight, and is configured with structural reinforcement ribs to improve structural strength; one end of the first swing arm mounting bracket 311 is connected to the longitudinal beam section 1 on its side, that is, the lower end surface of the first longitudinal beam 11, and the other end is extended downward along the height direction of the vehicle, and the lower end of the first swing arm mounting bracket 311 is connected to the first swing arm mounting seat 3111; the first swing arm mounting seat 3111 can be an ear-type structure, by configuring mounting points on the ears on both sides and through bolts and bushings to achieve the connection of the swing arm or connecting rod, and the surface between the two mounting points is hollowed out to avoid the swing arm movement envelope; the second swing arm connecting bracket group 32 includes a pair of second swing arm mounting brackets 321. Taking the second swing arm mounting bracket 321 on the side of the first longitudinal beam 11 as an example, the second swing arm One end of the mounting bracket 321 is connected to the longitudinal beam section 1 on its side, i.e., the first longitudinal beam 11, and the other end is extended inwardly along the vehicle width direction, and the other end of the second swing arm mounting bracket 321 is connected to the second swing arm mounting seat 3211. In the present embodiment, the second swing arm mounting seat 3211 is constructed as an ear-type structure, by configuring mounting points on the ears on both sides and using bolts and bushings to achieve the connection of the swing arm or connecting rod, and the surface between the two mounting points is hollowed out to avoid the swing arm movement envelope, and the second swing arm mounting bracket 321 can be used as an extension of the second swing arm mounting seat 3211, extending the distance between the second swing arm mounting seat 3211 and the first longitudinal beam 11 to avoid the boundary of the first longitudinal beam 11 from interfering with the movement of the swing arm or connecting rod; wherein, the height position of the first swing arm mounting seat 3111 in the vehicle height direction corresponds to the third swing arm mounting seat 3312, and the height position of the second swing arm mounting seat 3211 in the vehicle height direction corresponds to the fourth swing arm mounting seat 3413. In this way, the force transmission path of the suspension system can be optimized and the handling performance of the suspension system can be improved.

[0051] In some embodiments, Figures 3 to 5As shown, the first swing arm mounting bracket 311 is also connected to the fifth swing arm mounting seat 3112. The fifth swing arm mounting seat 3112 can be an ear-type structure, by configuring mounting points on the ears on both sides and using bolts and bushings to achieve the connection of the swing arm or the connecting rod, and the surface between the two mounting points is hollowed out to avoid the swing arm movement envelope; the fifth swing arm mounting seat 3112 is formed in the middle of the first swing arm mounting bracket 311 and extends outward along the vehicle width direction. In this embodiment, the side walls of the middle of the first swing arm mounting bracket 311 can be used as ears on both sides to configure mounting points, and the first swing arm mounting seat 3111 is connected to the bottom of the fifth swing arm mounting seat 3112. In this way, when applied to a five-link independent suspension system, the fifth swing arm mounting seat 3112 can provide installation requirements for the rear upper transverse tie rod or the rear wheel toe link, and the first swing arm mounting seat 3111 is used to connect the rear lower transverse tie rod, which can effectively optimize the force transmission path between the first swing arm mounting seat 3111 and the fifth swing arm mounting seat 3112.

[0052] It is understandable that when the above rear floor structure is applied to a five-link independent suspension, the first swing arm mounting seat 3111 is suitable for connecting the rear lower lateral tie rod of the suspension system, the second swing arm mounting seat 3211 is suitable for connecting the rear upper diagonal tie rod of the suspension system, the third swing arm mounting group is suitable for connecting the rear lower swing arm of the suspension system, the fourth swing arm mounting seat 3413 is suitable for connecting the rear lower diagonal tie rod of the suspension system, and the fifth swing arm mounting seat 3112 is suitable for connecting the rear upper lateral tie rod of the suspension system, which can meet the performance requirements of the rear suspension system layout when the rear subframe is eliminated. When the above rear floor structure is applied to a non-five-link independent suspension, there is no need to connect the swing arm or the connecting rod at the fifth swing arm mounting seat 3112, so that the same first swing arm mounting bracket 311 can meet the installation requirements of multiple solutions, saving development costs.

[0053] In some embodiments, Figures 1 to 5As shown, the rear floor structure also includes a first wheel cover 51 and a second wheel cover 52. The first wheel cover 51 is formed on the upper end surface of the first longitudinal beam 11. A first shock absorber mounting seat 511 is provided in the first wheel cover 51. First reinforcing ribs 512 extend from the upper and lower sides of the first shock absorber mounting seat 511 along the height direction of the vehicle. The first reinforcing ribs 512 extend upward to be connected to the upper end of the first wheel cover 51 and extend downward to be connected to the first longitudinal beam 11. The second wheel cover 52 is formed on the upper end surface of the second longitudinal beam 12 corresponding to the first wheel cover 51. A second shock absorber mounting seat 521 is provided in the second wheel cover 52. The second reinforcing ribs 522 are extended along the vehicle height direction on the upper and lower sides of the mounting seat 521, and the second reinforcing ribs 522 extend upward to be connected to the upper end of the second wheel cover 52, and extend downward to be connected to the second longitudinal beam 12; wherein, the positions of the first shock absorber mounting seat 511 and the second shock absorber mounting seat 521 in the vehicle length direction correspond to the third suspension mounting bracket 43, so that the first wheel cover 51 and the second wheel cover 52 can be used as the extended support structure of the third suspension mounting bracket 43 and the third swing arm connecting bracket group 33 in the vehicle height direction, so as to realize the installation and torque transmission of the shock absorber, and at the same time, Figure 6 As shown, the first reinforcing rib 512 and the second reinforcing rib 522 can extend upward along the vehicle height direction to the wheel house stop and connect with the upper body side enclosure, so that the third suspension mounting bracket 43, the third swing arm connecting bracket group 33, the first wheel house 51 and the second wheel house 52 (the first reinforcing rib 512 and the second reinforcing rib 522) and the side enclosure C-pillar and the upper body roof cover cross beam in the plane inner enclosure formed in the vehicle height direction and the vehicle width direction form a complete closed annular structure, thereby increasing the corresponding moment of inertia and improving its structural strength and collision performance.

[0054] Furthermore, if Figures 3 to 5 As shown, the first longitudinal beam 11 is further connected to a spring mounting seat 3313 at the lower end surface of the first end portion 33111, so as to be suitable for connecting the spring of the suspension system. Through the above arrangement, the force transmission path of the suspension spring can be optimized to the above Figure 6 In the ring structure shown, the connection stability of the overall structure is guaranteed.

[0055] In some embodiments, the longitudinal beam section 1 and the first cross beam 21 may also be structurally optimized to improve the structural strength and bearing capacity of the rear floor structure; Figures 3 to 5As shown, in this embodiment, the first cross beam 21 includes a cross beam main section 211 extending in the vehicle width direction and a first support portion 212 and a second support portion 213 respectively formed at both ends of the cross beam main section 211 in the vehicle width direction; the first longitudinal beam 11 includes a first connecting section 111 and a first main section 112, one end of the first connecting section 111 is connected to the first support portion 212, and the other end is connected to the first main section 112; the second longitudinal beam 12 includes a second connecting section 121 and a second main section 122, one end of the second connecting section 121 is connected to the second support portion 212, and the other end is connected to the first main section 112. The support portion 213 has its other end connected to the second main body section 122; wherein, the relatively inner side profile of the first support portion 212 and the second support portion 213 is a first structural surface 214, and the first structural surface 214 extends inwardly from bottom to top along the vehicle height direction to the lower end surface of the cross beam main body section 211; the relatively outer side profile of the first connecting section 111 and the second connecting section 121 is a second structural surface 113 / 113', and the second structural surface 113 / 113' extends outwardly from back to front along the vehicle length direction to the relatively outer side surfaces of the first support portion 212 and the second support portion 213. In this way, by setting the first structural surface 214, the first support portion 212 and the second support portion 213 can be constructed as an arched support of the first cross beam 21, thereby improving the structural strength and load-bearing capacity of the first cross beam 21 and the connection strength of the connection between the first cross beam 21 and the longitudinal beam section 1; by setting the second structural surface 113 / 113', the bending and torsional rigidity of the rear floor structure are further improved, and when a collision occurs, the force from the rear of the vehicle can be guided to the front to better absorb and reduce the impact force caused by the collision.

[0056] It is understandable that the first structural surface 214 can be a curved surface with a smooth transition upward, or a plurality of stepped surfaces extending upward step by step, which can be set according to specific design requirements or simulation results, and is not specifically limited here. The second structural surface 113 / 113' can be a curved surface with a smooth transition forward, thereby ensuring the continuity of the collision force transmission path and improving the torque transmission effect.

[0057] Preferably, if Figure 4 and Figure 5As shown, in this embodiment, the first connecting section 111 and the second connecting section 121 are constructed to extend forward along the length direction of the vehicle and obliquely downward along the height direction of the vehicle, so that the first cross beam 21 is suitable for connecting the floor and the middle frame of the vehicle body, and dispersing the received force and vibration forward to the entire vehicle structure, so that the vehicle body can better absorb and reduce vibration and impact force during driving. At the same time, the first suspension mounting bracket 41 in the suspension connecting bracket group 4 can also be arranged on the first connecting section 111 of the first longitudinal beam 11, and the second suspension mounting bracket 42 can be arranged on the second connecting section 121 of the second longitudinal beam 12. Without changing the structure of the first suspension mounting bracket 41 and the second suspension mounting bracket 42, the downward inclined connecting section can be used to correct the height positions of the first suspension mounting bracket 41 and the second suspension mounting bracket 42 in the vehicle height direction to ensure that the two correspond to the third suspension mounting bracket 43, thereby improving the installation stability of the suspension system or the drive system; and a plurality of swing arm connecting bracket groups are symmetrically arranged on the first main body section 112 and the second main body section 122, and the regular structure of the first main body section 112 and the second main body section 122 is used to ensure the support performance requirements, and the installation of the suspension system, the drive system and the suspension system can be facilitated, thereby improving the assembly efficiency of the vehicle.

[0058] At the same time, preferably, the rear floor structure can also be configured with a number of structural reinforcement ribs connected horizontally and vertically on the surface or inside of the above-mentioned longitudinal beam section 1, the first cross beam 21, the suspension connecting bracket group 4 and the plurality of swing arm connecting bracket groups according to the structural direction. The structural reinforcement ribs are die-cast integrally with the various components of the rear floor structure, which can guide the torque transmission and improve the structural strength and collision performance of the rear floor structure; the number, direction and size of the structural reinforcement ribs can be optimized through topological analysis according to specific design requirements or simulation results, and are not specifically limited here.

[0059] like Figures 1 to 3 As shown, in another embodiment, a rear floor assembly is also provided, which includes a second cross beam 22 and the rear floor structure of the above embodiment, the second cross beam 22 is extended in the vehicle width direction, the first longitudinal beam 11 and the second longitudinal beam 12 are extended forward in the vehicle length direction to extend beyond the first cross beam 21, and are connected to the two ends of the second cross beam 22 in the vehicle width direction. Through the arrangement of the second cross beam 22, the vehicle structure including the middle floor, the middle side wall, the door sill beam or the battery can be connected forward, the torsional rigidity of the rear floor assembly is ensured, and the force and vibration received by the rear floor assembly during driving or collision are effectively dispersed to the entire vehicle structure, so that the vehicle body can better absorb and reduce the vibration and impact force during driving.

[0060] Preferably, the second cross beam 22 and the rear floor structure are connected as one body by die-casting, which can further improve the bending and torsional rigidity of the rear floor assembly and reduce the risk of deformation at the connection.

[0061] In addition, in another embodiment, a vehicle is provided, which includes the rear floor structure of the above embodiment or the rear floor assembly of the above embodiment. It can be understood that, in the above rear floor assembly and vehicle, other structures and working principles of the rear floor structure can be referred to the above description of the embodiment of the rear floor structure. Since the rear floor structure has the above technical effects, the rear floor assembly having the rear floor structure, the vehicle having the rear floor structure or the vehicle having the rear floor assembly should also have corresponding technical effects, which will not be described in detail here.

[0062] It is understood that in this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined. And the description of the terms "some embodiments", "exemplarily", etc. 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.

[0064] 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 different embodiments or examples and features of different embodiments or examples described in this specification without contradicting each other.

[0065] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. A rear floor structure, characterized in that: The rear floor structure is an integrally formed part, comprising: A longitudinal beam section, wherein the longitudinal beam section includes a first longitudinal beam and a second longitudinal beam, wherein the first longitudinal beam and the second longitudinal beam extend in a vehicle length direction and are spaced apart in a vehicle width direction; a first cross beam, the first cross beam extending along the vehicle width direction, and having two ends in the vehicle width direction connected to the first longitudinal beam and the second longitudinal beam respectively; A swing arm connecting bracket group suitable for connecting the suspension system, wherein the swing arm connecting bracket group is provided with a plurality of groups, and the plurality of groups of the swing arm connecting bracket groups are spaced apart along the length direction of the vehicle; wherein each group of the swing arm connecting bracket group comprises a pair of swing arm mounting brackets, and each pair of the swing arm mounting brackets are symmetrically arranged on the first longitudinal beam and the second longitudinal beam along the width direction of the vehicle; and A suspension connecting bracket group suitable for connecting a suspension system, the suspension connecting bracket group includes a first suspension mounting bracket, a second suspension mounting bracket and a third suspension mounting bracket, the first suspension mounting bracket and the second suspension mounting bracket are respectively arranged on the side of the first longitudinal beam and the second longitudinal beam close to the first cross beam, the third suspension mounting bracket is arranged between one group of the swing arm connecting bracket groups on the side away from the first cross beam, and extends to both ends along the vehicle width direction to the two swing arm mounting brackets connected to the group of the swing arm connecting bracket groups, so as to enclose the first longitudinal beam, the second longitudinal beam and the first cross beam to form a closed frame structure suitable for installing the suspension system and the suspension system.

2. The rear floor structure according to claim 1, characterized in that: The swing arm connecting bracket group includes a first swing arm connecting bracket group, a second swing arm connecting bracket group, a third swing arm connecting bracket group and a fourth swing arm connecting bracket group, and the first swing arm connecting bracket group, the second swing arm connecting bracket group, the third swing arm connecting bracket group and the fourth swing arm connecting bracket group are distributed in sequence from front to rear along the length direction of the vehicle; wherein, the first swing arm connecting bracket group and the third swing arm connecting bracket group are extended downward along the height direction of the vehicle, so that the positions of the first swing arm connecting bracket group and the third swing arm connecting bracket group in the height direction of the vehicle are lower than the second swing arm connecting bracket group and the fourth swing arm connecting bracket group; the third suspension mounting bracket is correspondingly connected to the third swing arm connecting bracket group.

3. The rear floor structure according to claim 2, characterized in that: The third swing arm connecting bracket group includes a pair of third swing arm mounting brackets, the third swing arm mounting bracket includes a first connecting portion and a third swing arm mounting seat, the first connecting portion extends toward the longitudinal beam section on the side where the first connecting portion is located to form a first end portion, the first end portion is connected to the lower end surface and the inner end surface of the longitudinal beam section; the first connecting portion extends inwardly along the vehicle width direction and downwardly along the vehicle height direction to form a second end portion, the third swing arm mounting seat is connected to the second end portion; the first connecting portion forms a third end portion toward the other third swing arm mounting bracket on the opposite side, the third end portion is located at the connection between the first end portion and the second end portion; The third suspension mounting bracket includes a second connecting portion and a third suspension mounting seat, the second connecting portion is extended along the width direction of the vehicle, the third suspension mounting seat is located in the middle of the second connecting portion and connected to the bottom of the second connecting portion; the second connecting portion is respectively connected to the third end portions of the third swing arm mounting brackets on both sides at both ends in the width direction of the vehicle.

4. The rear floor structure according to claim 3, characterized in that: The third suspension mounting bracket also includes a third connecting portion, which is extended along the vehicle width direction and connected to the bottom of the third suspension mounting seat corresponding to the second connecting portion; the third connecting portion is respectively connected to the third swing arm mounting seats of the third swing arm mounting brackets on both sides at both ends in the vehicle width direction.

5. The rear floor structure according to claim 4, characterized in that: The fourth swing arm connecting bracket group includes a pair of fourth swing arm mounting brackets, and the fourth swing arm mounting bracket includes a fourth connecting portion, a fifth connecting portion and a fourth swing arm mounting seat, one end of the fourth connecting portion is connected to the longitudinal beam section on its side, and the other end extends downward along the vehicle height direction to a height position corresponding to the third end portion; one end of the fifth connecting portion is connected to the other end of the fourth connecting portion, and the other end of the fifth connecting portion extends inward along the vehicle width direction to a position corresponding to the third end portion, and bends forward along the vehicle length direction to extend to connect to the first connecting portion; the fourth swing arm mounting seat is connected to the bending part of the fifth connecting portion, and is arranged toward the inner side of the bending part.

6. The rear floor structure according to claim 5, characterized in that: The lower end surface of the fourth connecting portion is also connected to a stabilizing rod mounting seat.

7. The rear floor structure according to claim 6, characterized in that: The first swing arm connecting bracket group includes a pair of first swing arm mounting brackets, one end of the first swing arm mounting bracket is connected to the lower end surface of the longitudinal beam section on the side where the first swing arm mounting bracket is located, and the other end is extended downward along the height direction of the vehicle, and the lower end of the first swing arm mounting bracket is connected to a first swing arm mounting seat; The second swing arm connecting bracket group includes a pair of second swing arm mounting brackets, one end of the second swing arm mounting bracket is connected to the longitudinal beam section on the side where the second swing arm mounting bracket is located, and the other end is extended inwardly along the vehicle width direction, and the other end of the second swing arm mounting bracket is connected to a second swing arm mounting seat; wherein, The height position of the first swing arm mounting seat in the vehicle height direction corresponds to the third swing arm mounting seat, and the height position of the second swing arm mounting seat in the vehicle height direction corresponds to the fourth swing arm mounting seat.

8. The rear floor structure according to claim 7, characterized in that: The first swing arm mounting bracket is also connected to a fifth swing arm mounting seat; the fifth swing arm mounting seat is connected to the middle part of the first swing arm mounting bracket and extends outward along the vehicle width direction; the first swing arm mounting seat is connected to the bottom of the fifth swing arm mounting seat.

9. The rear floor structure according to any one of claims 1 to 8, characterized in that: The rear floor structure further comprises: a first wheel cover, wherein the first wheel cover is formed on an upper end surface of the first longitudinal beam, a first shock absorber mounting seat is provided in the first wheel cover, first reinforcing ribs are extended along the height direction of the vehicle at upper and lower sides of the first shock absorber mounting seat, and the first reinforcing ribs extend upward to be connected to an upper end of the first wheel cover and extend downward to be connected to the first longitudinal beam; and A second wheel cover, wherein the second wheel cover is formed on the upper end surface of the second longitudinal beam corresponding to the first wheel cover, a second shock absorber mounting seat is provided in the second wheel cover, and second reinforcing ribs are extended along the height direction of the vehicle on upper and lower sides of the second shock absorber mounting seat, and the second reinforcing ribs extend upward to be connected to the upper end of the second wheel cover and extend downward to be connected to the second longitudinal beam; wherein, Positions of the first shock absorber mounting seat and the second shock absorber mounting seat in the length direction of the vehicle correspond to the third suspension mounting bracket.

10. The rear floor structure according to claim 9, characterized in that: The first cross beam comprises a cross beam main section and a first support portion and a second support portion respectively formed at two ends of the cross beam main section in the vehicle width direction; The first longitudinal beam comprises a first connecting section and a first main section, one end of the first connecting section is connected to the first supporting portion, and the other end is connected to the first main section; The second longitudinal beam includes a second connecting section and a second main section, one end of the second connecting section is connected to the second supporting portion, and the other end is connected to the second main section; wherein, The inner profiles of the first supporting portion and the second supporting portion are opposite to each other and are first structural surfaces, and the first structural surfaces extend inwardly from bottom to top along the height direction of the vehicle to the lower end surface of the main section of the cross beam; The opposite outer side profiles of the first connecting section and the second connecting section are second structural surfaces, and the second structural surfaces extend outwardly from rear to front along the length direction of the vehicle to the opposite outer side surfaces of the first supporting portion and the second supporting portion.

11. A rear floor assembly, characterized in that: It includes a second cross beam and the rear floor structure according to any one of claims 1 to 10, wherein the second cross beam is extended along the vehicle width direction, and the first longitudinal beam and the second longitudinal beam extend forward along the vehicle length direction to extend beyond the first cross beam and are connected to both ends of the second cross beam in the vehicle width direction.

12. A vehicle, characterized in that: It comprises the rear floor structure according to any one of claims 1 to 10 or the rear floor assembly according to claim 11.

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