CN218858541U

CN218858541U - Backrest ring assembly and automobile

Info

Publication number: CN218858541U
Application number: CN202223590991.2U
Authority: CN
Inventors: 张书任; 张涛; 贺志杰; 陈强; 高鹏; 武文波
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-04-14
Anticipated expiration: 2032-12-29

Abstract

The utility model provides a backrest ring assembly and an automobile, the backrest ring assembly of the utility model comprises a backrest ring with the bottom connected on the rear floor, wherein the left side and the right side of the backrest ring are both connected with a B-column connecting component extending forwards and a rear connecting plate extending backwards; the B-column connecting assemblies on each side respectively comprise an upper connecting plate and a lower connecting plate which are arranged at intervals, and the front ends of the upper connecting plate and the lower connecting plate are connected to the B columns on the same side; the rear ends of the rear connecting plates on all sides are connected to the rear wheel covers on the same side. The utility model discloses a back ring assembly, through the anterior and B post connection of back ring, the rear portion is connected with the rear wheel casing, and the bottom is connected with the back floor, can improve the holistic torsional rigidity in back ring position, also is favorable to promoting car collision security.

Description

Backrest ring assembly and automobile

Technical Field

The utility model relates to the technical field of automobiles, in particular to back ring assembly. The utility model discloses still relate to the car that is equipped with above-mentioned back ring assembly.

Background

Convertible automobiles are generally cars with foldable openable roofs and are gaining increasing consumer popularity due to their novel styling, excellent visibility, and a full sense of technology.

In the prior art, most convertible automobiles are provided with two rows of seats, namely a front row of seats and a rear row of seats, and some automobile types are provided with a backrest ring at the rear part of the rear row of seats so as to support the rear row of seats. In the open car body structure, due to the loss of the upper car body, a force transmission channel between B pillars on two sides is reduced, and when a car is laterally collided, the B pillars are easy to cause large position intrusion amount, so passengers in the car are injured, and the safety of the lateral collision is influenced.

In addition, among the present convertible car body structure, the back ring is connected with the side wall of both sides usually, not only causes the whole torsional rigidity in back ring position to lower to the back ring often can't participate in the transmission of collision force when the car bumps, causes the power transmission passageway to lack, is unfavorable for the transmission dispersion to the collision force, and can influence the promotion of convertible car collision security.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a backrest ring assembly for improving the safety of vehicle collision.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a backrest ring assembly comprises a backrest ring, wherein the bottom of the backrest ring is connected to a rear floor, and the left side and the right side of the backrest ring are both connected with a B-pillar connecting assembly extending forwards and a rear connecting plate extending backwards;

the B column connecting assemblies on each side respectively comprise upper connecting plates and lower connecting plates which are arranged at intervals, and the front ends of the upper connecting plates and the lower connecting plates are connected to the B columns on the same side;

the rear ends of the rear connecting plates on all sides are connected to the rear wheel covers on the same side.

Furthermore, the backrest ring comprises two longitudinal beams which are respectively arranged on the left side and the right side, a bottom cross beam connected with the bottoms of the two longitudinal beams, and a middle cross beam connected between the tops of the two longitudinal beams;

the bottom cross beam is connected to the rear floor, the rear ends of the upper connecting plate and the lower connecting plate on each side are connected to the longitudinal beam on the same side, and the front end of the rear connecting plate on each side is connected to the longitudinal beam on the same side.

Furthermore, the left end and the right end of the bottom cross beam are respectively connected with longitudinal beam connecting plates, and each longitudinal beam connecting plate is connected with the rear floor longitudinal beam on the same side.

Furthermore, headrest mounting brackets are arranged on the left side and the right side of the middle cross beam respectively, and each headrest mounting bracket is connected between the longitudinal beam and the middle cross beam on the same side.

Furthermore, both sides all be equipped with hollow installation cavity in the longeron, just the uncovered setting in top of installation cavity.

Furthermore, connecting supports are respectively arranged on the longitudinal beams on the two sides, the rear ends of the upper connecting plate and the lower connecting plate on each side are connected to the connecting supports on the same side, and the front ends of the rear connecting plates on each side are connected to the connecting supports on the same side.

Furthermore, the connecting support comprises an upper support and a lower support which are arranged at intervals, the upper connecting plate on each side is connected with the upper support on the same side, and the lower connecting plate and the rear connecting plate on each side are connected with the lower support on the same side.

Further, at least one of the longitudinal beam, the bottom cross beam, the middle cross beam, the upper connecting plate, the lower connecting plate and the connecting bracket is made of extruded aluminum profiles.

Furthermore, the rear ends of the rear connecting plates on the two sides are connected with the rear shock absorber reinforcing plate on the rear wheel cover on the same side.

Compared with the prior art, the utility model discloses following advantage has:

backrest ring assembly, through the B post coupling assembling that constitutes by upper junction plate and lower connecting plate, and the setting of back connecting plate, make the anterior and B post connection of backrest ring, the rear portion is connected with the rear wheel casing, the bottom is connected with the back floor, it utilizes the connection between each parts of backrest ring and periphery from this, not only can improve the holistic torsional rigidity in backrest ring position, also can establish the biography power passageway between backrest ring and periphery parts simultaneously, help the transmission dispersion of collision force, thereby be favorable to promoting the car security.

In addition, the backrest ring is composed of longitudinal beams on two sides, a bottom cross beam and a middle cross beam, the structure is simple, and the structural strength of the backrest ring is guaranteed by utilizing the characteristic that the backrest ring is of a frame type structure. The two ends of the bottom cross beam are connected with the rear floor longitudinal beams through the longitudinal beam connecting plates, namely a cross beam structure is additionally arranged between the rear floor longitudinal beams on the two sides, so that the rigidity of the rear floor can be improved, and the rigidity of the position of the backrest ring can also be improved by utilizing the rear floor longitudinal beams on the two sides. The headrest installing support is arranged, so that the headrest of the back row seat can be conveniently installed, the headrest installing support is connected between the longitudinal beam and the middle cross beam, and the stability of the headrest installing support can be guaranteed. The longitudinal beam is internally provided with the mounting cavity, so that the installation of the bouncing mechanism at the backrest ring can be facilitated.

In addition, the connecting support is arranged, so that the upper connecting plate, the lower connecting plate and the rear connecting plate are connected with the connecting support, and the upper connecting plate, the lower connecting plate and the rear connecting plate can be conveniently connected with the longitudinal beam in the backrest ring. The connecting support on each side is composed of the upper support and the lower support, so that the preparation of the connecting support is facilitated, the weight reduction of the connecting support is also facilitated, and the light weight design of the whole backrest ring is facilitated. The longitudinal beam, the bottom cross beam, the middle cross beam, the upper connecting plate, the lower connecting plate and the connecting support are made of extruded aluminum profiles, so that the longitudinal beam, the bottom cross beam, the middle cross beam, the upper connecting plate, the lower connecting plate and the connecting support are convenient to process and manufacture, and the characteristics of the extruded aluminum profiles can be utilized, so that the weight reduction is facilitated, and the structural strength of each beam body or each plate body is ensured. The rear end of the rear connecting plate is connected with the rear shock absorber reinforcing plate on the rear wheel cover, so that the reliability of the connection between the rear connecting plate and the rear wheel cover can be ensured, and the torsional rigidity of the backrest ring position can be further improved.

Another object of the present invention is to provide a car, wherein the backrest ring assembly is disposed in the car.

The car set up above-mentioned back ring assembly, can improve back ring position whole torsional rigidity, be favorable to promoting car collision security, and have fine practicality.

Drawings

The accompanying drawings, which form a part of the present disclosure, are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and together with the description serve to explain the present disclosure. In the drawings:

fig. 1 is a schematic structural view of a backrest ring assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view from the rear of the structure of FIG. 1;

FIG. 3 is a schematic view from the bottom of the structure of FIG. 1;

fig. 4 is a schematic structural view of a backrest ring according to an embodiment of the present invention;

FIG. 5 is a schematic view from the rear of the structure of FIG. 4;

fig. 6 is a schematic structural view of an upper bracket according to an embodiment of the present invention;

description of the reference numerals:

1. a rear floor; 2. a back ring; 3. a B-pillar connecting assembly; 4. a column B; 5. a rear floor stringer; 6. a rear wheel cover; 7. a rear connecting plate; 8. a rear damper stiffener plate; 9. a threshold beam;

201. a stringer; 202. a bottom cross member; 203. a middle cross beam; 204. a headrest mounting bracket; 205. connecting a bracket; 2051. an upper bracket; 2052. a lower bracket; 206. a longitudinal beam connecting plate;

301. an upper connecting plate; 302. a lower connecting plate;

q, mounting a cavity; K. mounting grooves; m, mounting surface.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that if terms indicating directions or positional relationships such as "up", "down", "inside", "outside", etc. appear, they are based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same order, but are to be construed as referring to the same order.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in conjunction with the specific situation for a person of ordinary skill in the art.

In the description of the present invention, the vehicle longitudinal direction (X direction), the vehicle lateral direction (Y direction), and the vehicle vertical direction (Z direction) are the vehicle height direction.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The embodiment relates to a backrest ring assembly which can improve the torsional rigidity of the position of a backrest ring 2 in a convertible car and is beneficial to the dispersion and transmission of collision force at the position of the backrest ring 2, so that the collision safety of the car can be improved.

In an overall structure, as shown in fig. 1 and fig. 2, the backrest ring assembly of the present embodiment includes a backrest ring 2 connected to the rear floor 1 at the bottom, and B-pillar connecting members 3 extending forward and a rear connecting plate 7 extending rearward are connected to both left and right sides of the backrest ring 2. Wherein, each side B post coupling assembling 3 all includes the upper junction plate 301 and the lower connecting plate 302 that the interval set up, and the front end of upper junction plate 301 and lower connecting plate 302 also all is connected on the B post 4 of homonymy. The rear ends of the rear connecting plates 7 on the sides are connected to the rear wheel covers 6 on the same side.

More specifically, as shown in fig. 4 and 5, the upper connecting plate 301 and the lower connecting plate 302 on both sides of the present embodiment are formed in an arch structure that is arched toward the vehicle exterior side, which facilitates the arrangement of the rear seats in front of the back ring 2. At the same time, the upper connection plate 301 and the lower connection plate 302 are made to arch toward the vehicle exterior side, and also contribute to the connection between the two, the B-pillar 4 and the back ring 2.

In addition, as a preferred embodiment, the backrest ring 2 of the present embodiment includes two longitudinal beams 201 disposed on the left and right sides, a bottom cross beam 202 connected to the bottoms of the two longitudinal beams 201, and a middle cross beam 203 connected between the tops of the two longitudinal beams 201. The longitudinal beams 201 on the two sides are connected with the bottom cross beam 202 on the bottom and the middle cross beam 203 on the top, so that the backrest ring 2 is integrally in a rectangular frame type structure, and at the moment, it can be understood that the backrest ring 2 is composed of the longitudinal beams 201 on the two sides, the bottom cross beam 202 and the middle cross beam 203, and not only is the structure simple and convenient for preparing the backrest ring 2, but also the characteristic that the backrest ring 2 is in the frame type structure can be utilized, and the structural strength of the backrest ring 2 is guaranteed.

On the basis of the above-described structural configuration of the backrest ring 2, the bottom cross member 202 is connected to the rear floor 1, so that the connection between the bottom of the backrest ring 2 and the rear floor 1 is realized. Meanwhile, the rear ends of the upper tie plate 301 and the lower tie plate 302 in each side B-pillar connecting assembly 3 are connected to the same side member 201, and the front end of each side rear tie plate 7 is also connected to the same side member 201.

However, it should be noted that, in addition to the above structure, the backrest ring 2 of the present embodiment may also be formed in other structures, as long as the backrest ring 2 has better structural strength and can be adapted and connected with the B-pillar connecting members 3 and the rear connecting plates 7 on both sides.

Still by way of example, the backrest ring 2 of the above-described configuration is described, and in this embodiment, as a preferred embodiment, the side member attachment plates 206 are connected to the left and right ends of the bottom cross member 202, respectively, and each side member attachment plate 206 is connected to the rear floor side member 5 on the same side. At this time, the two ends of the bottom cross beam 202 are connected with the rear floor longitudinal beams 5 through the longitudinal beam connecting plates 206, which is equivalent to adding a cross beam structure between the two side rear floor longitudinal beams 5, and the cross beam structure not only can improve the rigidity of the rear floor 1, but also can utilize the two side rear floor longitudinal beams 5 to improve the rigidity of the position of the backrest ring 2 because the cross beam structure is mainly composed of the bottom cross beam 202.

In the present embodiment, as a preferred embodiment, the center cross member 203 is also provided with headrest mounting brackets 204 provided on the left and right sides. In specific implementation, the headrest mounting brackets 204 on two sides are arranged on the side of the middle cross beam 203 facing the vehicle head, and each headrest mounting bracket 204 is also connected between the longitudinal beam 201 and the middle cross beam 203 on the same side. In this way, the headrest mounting bracket 204 is arranged, so that the headrest of the back seat can be conveniently mounted, the headrest mounting bracket 204 is connected between the longitudinal beam 201 and the middle cross beam 203, and the stability of the arrangement of the headrest mounting bracket 204 can be ensured by utilizing the common reinforcing effect of the longitudinal beam 201 and the middle cross beam 203.

It should be noted that the headrest mounting bracket 204 may be a conventional bracket structure for mounting a headrest in an existing automobile, and generally has two mounting sleeves arranged side by side for inserting a headrest rod to mount the headrest. In addition, the headrest mounting bracket 204 may be generally connected between the center cross member 203 and the side member 201 by welding, but, instead of welding, the headrest mounting bracket 204 may be provided by a conventional method such as screwing or riveting.

In this embodiment, as a preferred implementation form, a hollow installation cavity Q is provided in each of the side stringers 201, and the top of the installation cavity Q is open. At this time, by providing the mounting cavity Q in the longitudinal beam 201 and making the top thereof open, a mounting point may be provided in the longitudinal beam 201, and the backrest ring pop-up mechanism may be mounted in the longitudinal beam 201, so as to facilitate the mounting of the pop-up mechanism.

With continued reference to fig. 1, 2, and 4 to 6, as a possible implementation form of this embodiment, the connecting brackets 205 are respectively provided on the side stringers 201, and the rear ends of the upper connecting plate 301 and the lower connecting plate 302 on each side are connected to the connecting bracket 205 on the same side, and at the same time, the front end of the rear connecting plate 7 on each side is also connected to the connecting bracket 205 on the same side. At this time, the connection between the upper connecting plate 301, the lower connecting plate 302 and the rear connecting plate 7 and the longitudinal beam 201 in the back ring 2 can be facilitated by the connecting brackets 205 respectively provided on both sides and by making the upper connecting plate 301, the lower connecting plate 302 and the rear connecting plate 7 connected to the connecting brackets 205.

In practical implementation, it is preferable that the embodiment also enables the connecting brackets 205 on each side to include upper brackets 2051 and lower brackets 2052 arranged at intervals, and the upper connecting plate 301 on each side is connected with the upper bracket 2051 on the same side, and the lower connecting plate 302 on each side and the rear connecting plate 7 on each side are connected with the lower bracket 2052 on the same side. The connecting brackets 205 on each side are composed of the upper bracket 2051 and the lower bracket 2052, and it can be understood that the connecting brackets 205 can be manufactured easily, and compared with the case of only using one connecting bracket 205, the size of the connecting bracket 205 can be reduced, the weight of the connecting bracket 205 can be reduced, and the light weight design of the whole backrest ring 2 can be facilitated.

In the specific structure of the upper support 2051 and the lower support 2052, taking the upper support 2051 as an example, the embodiment is a preferred embodiment, and a mounting groove K in a "U" shape is provided thereon. The notch of this mounting groove K is located the lateral part of upper bracket 2051, and during the assembly, the rear end of upper junction plate 3 clamps earlier in this mounting groove K, then links firmly alright together with upper bracket 2051 through FDS (Flow Drill screen, rotatory tapping riveting) or spiro union mode again.

Of course, instead of providing the mounting groove K for the connection between the upper bracket 2051 and the upper connection plate 301, it is also possible to use other conventional structures for the connection therebetween. Meanwhile, the lower support 2052 has the same structure as the upper support 2051, and the connection between the lower connection plate 302 and the lower support 2052 can be made as described above.

Further, in addition to the installation groove K, as a preferable embodiment, the present embodiment is also provided with the installation surface M on both the side of the upper rack 2051 and the lower rack 2052 facing the vehicle rear. The mounting surface M may be generally flat and the front end of the rear link 7 may be attached to the mounting surface M on the lower bracket 2052, for example, while the mounting surfaces M on the upper and

lower brackets

2051, 2052 may be used to mount other accessories on the back of the back ring 2, in addition to being used to connect to the rear link 7.

In this embodiment, it should be noted that, as a preferred embodiment, the longitudinal beams 201, the bottom cross beam 202, the middle cross beam 203, the upper connecting plate 301, the lower connecting plate 302 and the connecting brackets 205 can be made of extruded aluminum profiles. The longitudinal beam 201, the bottom cross beam 202, the middle cross beam 203, the upper connecting plate 301, the lower connecting plate 302 and the connecting bracket 205 are made of extruded aluminum profiles, so that the processing and the preparation of each beam body or plate body can be facilitated, the characteristics of light weight and high strength of the extruded aluminum profiles can be utilized, the weight reduction can be realized, and the structural strength of each beam body or plate body can be ensured.

Of course, instead of being made of extruded aluminum profiles, one or more of the longitudinal beams 201, the bottom transverse beam 202, the middle transverse beam 203, the upper connecting plate 301, the lower connecting plate 302 and the connecting bracket 205 of the present embodiment may also be made of other materials, and for example, it may be made of stamped sheet metal parts, welded sheet metal beam bodies, or carbon fiber composite materials, etc.

When extruded aluminum profiles are used, the different beams can be connected by MIG Welding (Melt Inert-gas Welding), and the plate body and the beams can be connected by FDS or screwing.

Furthermore, the bottom cross beam 202 and the rear floor 1 of the present embodiment may be connected by a screw or rivet method, the connecting brackets 205 on both sides may be connected to the longitudinal beam 201 by MIG welding, and the upper connecting plate 301 and the lower connecting plate 302 in the B-pillar connecting assembly 3 may be connected to the B-pillar 4 by a screw. In addition, the headrest mounting bracket 204 of the present embodiment is preferably made of an extruded aluminum profile, and the welding method between the headrest mounting bracket, the middle cross beam 203 and the longitudinal beam 201 may be MIG welding.

In this embodiment, as shown in fig. 2 in combination with fig. 3, on the basis that the rear ends of the rear connecting plates 7 on both sides are connected to the rear wheel house 6 on the same side, as a preferred embodiment, the rear ends of the rear connecting plates 7 on both sides are also connected to the rear shock absorber reinforcing plate 8 on the rear wheel house 6 on the same side. The rear shock absorption tower reinforcing plate 8 and the rear connecting plate 7 are respectively located on two sides of the rear wheel casing 6, and during specific implementation, the rear connecting plate 7, the rear wheel casing 6 and the rear shock absorber reinforcing plate 8 can be fixedly connected together in a threaded connection mode.

It can be understood that the present embodiment can ensure the reliability of the connection between the rear connecting plate 7 and the rear wheel house 6 by connecting the rear end of the rear connecting plate 7 and the rear shock absorber reinforcing plate 8 on the rear wheel house 6, thereby contributing to further increase of the torsional rigidity of the back ring 2.

The backrest ring assembly of this embodiment is connected with the rear floor 1 through the bottom of the backrest ring 2, the B-pillar connecting component 3 composed of the upper connecting plate 301 and the lower connecting plate 302 is connected with the B-pillar 4, and through the arrangement of the rear connecting plate 7 and the rear wheel casing 6, the front portion of the backrest ring 2 can be connected with the B-pillar, the rear portion is connected with the rear wheel casing 6, and the bottom portion is connected with the rear floor 1.

When the automobile collides, the frontal collision force can be transmitted to the backrest ring 2 through the doorsill beam 9 and the B-pillar 4 and then through the B-pillar connecting component 3, and can be transmitted and dispersed at the backrest ring 2 along the width direction of the whole automobile and transmitted and dispersed to the rear through the rear connecting plate 7. As for the rear collision force, it can be transmitted to the back ring 2 through the rear floor rail 5 and the rear wheel house 6, and transmitted in the entire vehicle width direction at the back ring 2, and transmitted forward through the B-pillar connecting assembly 3, the B-pillar, and the rocker beam 9. As for the side collision force, it can be transmitted to the backrest ring 2 through the B-pillar 4 and the B-pillar connecting member 3, and transmitted in the entire vehicle width direction at the backrest ring 2, and also can be dispersed forward and rearward by the rocker 9 and the rear floor stringer 5, respectively.

So, the back ring assembly of this embodiment utilizes the connection between back ring 2 and each part of periphery, not only can improve the holistic torsional rigidity in back ring 2 position, also can establish the biography power passageway simultaneously between back ring 2 and peripheral part, helps the transmission dispersion of collision force, security when can promoting the car collision, and has fine practicality.

Example two

The present invention relates to a vehicle, and more particularly to a convertible vehicle, in which a backrest ring assembly of the first embodiment is provided. The automobile of this embodiment can improve the whole torsional rigidity in back ring position through setting up the back ring assembly in the embodiment one, is favorable to promoting the car collision security, and has fine practicality.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A back ring assembly, comprising:

the backrest comprises a backrest ring (2) with the bottom connected to a rear floor (1), wherein the left side and the right side of the backrest ring (2) are both connected with a B-column connecting assembly (3) extending forwards and a rear connecting plate (7) extending backwards;

the B-column connecting assembly (3) on each side comprises an upper connecting plate (301) and a lower connecting plate (302) which are arranged at intervals, and the front ends of the upper connecting plate (301) and the lower connecting plate (302) are connected to the B columns (4) on the same side;

the rear ends of the rear connecting plates (7) on all sides are connected to the rear wheel covers (6) on the same side.

2. The back ring assembly of claim 1, wherein:

the backrest ring (2) comprises two longitudinal beams (201) which are respectively arranged on the left side and the right side, a bottom cross beam (202) connected with the bottoms of the two longitudinal beams (201), and a middle cross beam (203) connected between the tops of the two longitudinal beams (201);

the bottom cross beam (202) is connected to the rear floor (1), the rear ends of the upper connecting plate (301) and the lower connecting plate (302) on all sides are connected to the longitudinal beam (201) on the same side, and the front end of the rear connecting plate (7) on all sides is connected to the longitudinal beam (201) on the same side.

3. The back ring assembly of claim 2, wherein:

both ends are connected with longeron connecting plate (206) respectively about end frame (202), each longeron connecting plate (206) all links to each other with back floor longeron (5) with one side.

4. The back ring assembly of claim 2, wherein:

headrest mounting brackets (204) which are respectively arranged on the left side and the right side are arranged on the middle cross beam (203), and each headrest mounting bracket (204) is connected between the longitudinal beam (201) and the middle cross beam (203) on the same side.

5. The back ring assembly of claim 2, wherein:

both sides all be equipped with hollow installation cavity (Q) in longeron (201), just the open setting in top of installation cavity (Q).

6. The back ring assembly of claim 2, wherein:

the longitudinal beams (201) on the two sides are respectively provided with a connecting support (205), the rear ends of the upper connecting plate (301) and the lower connecting plate (302) on the two sides are connected to the connecting support (205) on the same side, and the front ends of the rear connecting plates (7) on the two sides are connected to the connecting support (205) on the same side.

7. The back ring assembly of claim 6, wherein:

the connecting bracket (205) comprises an upper bracket (2051) and a lower bracket (2052) which are arranged at intervals, the upper connecting plate (301) on each side is connected with the upper bracket (2051) on the same side, and the lower connecting plate (302) and the rear connecting plate (7) on each side are connected with the lower bracket (2052) on the same side.

8. The back ring assembly of claim 6, wherein:

at least one of the longitudinal beam (201), the bottom cross beam (202), the middle cross beam (203), the upper connecting plate (301), the lower connecting plate (302) and the connecting bracket (205) is made of extruded aluminum profiles.

9. The back ring assembly according to any one of claims 1 to 8, wherein:

the rear ends of the rear connecting plates (7) on the two sides are connected with a rear shock absorber reinforcing plate (8) on the rear wheel cover (6) on the same side.

10. An automobile, characterized in that:

the automobile is provided with the backrest ring assembly of any one of claims 1 to 9.