CN117734830A - Automobile body rear structure and car - Google Patents

Abstract

The invention provides a rear structure of a vehicle body and an automobile, and relates to the technical field of automobile parts. According to the scheme, the rear floor body and the rear wheel cover are arranged separately, and only the rear wheel cover is required to be replaced when the rear floor is applied to different vehicle types, so that the universality of the rear structure of the vehicle body is realized, and the development cost is reduced. And the rear wheel cover is independently formed, so that the rear wheel cover can be ejected from dies in different directions, the flexible design of the reinforcing ribs on the rear wheel cover is facilitated, and meanwhile, the positions are nearer to the pouring gate of the rear wheel cover die, so that the die casting quality is ensured.

Description

Automobile body rear structure and car

Technical Field

The invention relates to the technical field of automobile parts, in particular to a rear structure of an automobile body and an automobile.

Background

With the continuous development of automobile technology, people put higher demands on the safety and the universality of parts of the whole automobile. The rear cast aluminum floor and the wheel cover of the existing vehicle body rear structure generally adopt an integrated forming process, the mounting positions of the shock absorbers on the wheel cover are usually fixed, and when the rear cast aluminum floor and the wheel cover are applied to vehicle types with different wheelbases, the rear cast aluminum floor and the wheel cover are required to be integrally re-molded due to the fact that the mounting positions of the shock absorbers are moved forwards, backwards or upwards, so that the universalization degree of the vehicle body rear structure is low, and the vehicle development cost is increased. Meanwhile, because the rear cast aluminum floor and the wheel covers are integrally formed, under the limit of the left wheel cover and the right wheel cover, the part between the two wheel covers, namely the inner sides of the two wheel covers, can only be demolding along the Z direction (the height direction of the automobile), the demolding direction is limited, so that some key reinforcing ribs cannot be formed, the mold used for integrally forming the rear cast aluminum floor and the wheel covers is large, the pouring opening on the mold is generally in the middle position, the installation positions of the shock absorbers on the wheel covers on the two sides are far away from the pouring opening, the die casting performance of cast aluminum is difficult to guarantee, the extensibility is low, and the safety performance of the whole automobile can be influenced.

Disclosure of Invention

The invention aims to solve the technical problems of low universalization degree and poor safety performance of the existing vehicle body rear structure.

In a first aspect, the invention provides a rear structure of a vehicle body, which comprises a rear floor body and two rear wheel covers, wherein the rear floor body comprises two rear longitudinal beams and a first floor cross beam, the first floor cross beam is arranged between the two rear longitudinal beams, shock absorber mounting parts are respectively arranged on the two rear wheel covers, one ends of the two rear wheel covers facing the lower part of the vehicle are respectively and detachably connected with the corresponding rear longitudinal beams, two ends of the first floor cross beam respectively extend to the upper part of the vehicle to form an extension section, and one ends of the two rear wheel covers facing the front part of the vehicle are respectively and detachably connected with the corresponding extension section.

Compared with the prior art, the vehicle body rear structure has at least the following advantages:

the rear longitudinal beam of the rear floor body is respectively arranged on the left side and the right side of the automobile, the rear longitudinal beam extends along the front-rear direction of the automobile, a first floor cross beam of the rear floor body is connected between the two rear longitudinal beams, one end of a rear wheel cover facing the lower side of the automobile is detachably connected with the rear longitudinal beam, and one end of the rear wheel cover facing the front side of the automobile is detachably connected with the extending section of the first floor cross beam, so that the detachable connection of the rear wheel cover and the rear floor body is realized. The rear wheel cover is provided with the shock absorber installation part, and according to the requirements of different vehicle types or different wheelbases, the position of the rear shock absorber installation part can be adjusted only by replacing the rear wheel cover, so that the universality of the rear floor body is realized, and the development cost of the die is reduced. Meanwhile, the rear wheel cover and the rear floor body are separately arranged, namely, the rear wheel cover can be independently formed, when the die of the die-casting rear wheel cover is drawn, the die can be drawn along the Z direction (the height direction of the automobile) and the Y direction (the left and right directions of the automobile), and the proper reinforcing ribs can be machined on the shock absorber installation part of the rear wheel cover according to requirements so as to better meet the force transmission requirement.

Optionally, the rear wheel cover includes rear wheel cover body and longeron linkage segment, the longeron linkage segment with the rear wheel cover body is connected towards the one end of car below, the longeron linkage segment includes interconnect and each other first linkage segment and the second linkage segment that the angle set up, the rear longeron includes interconnect and each other the back longeron body and the turn-ups that the angle set up, first linkage segment with the laminating of back longeron body is connected, the second linkage segment with the turn-ups laminating is connected.

Optionally, the rear wheel cover further comprises a beam connecting section, the beam connecting section is connected with one end, facing the front of the automobile, of the rear wheel cover body, the beam connecting section is connected with the extending section through a first connecting piece and a second connecting piece, and the first connecting piece and the second connecting piece are arranged in a staggered mode.

Optionally, one end of the rear wheel cover body facing the front of the automobile is bent to one side of the inside of the automobile to form a first transition reinforcing rib, and the rear wheel cover body is in smooth transition connection with the cross beam connecting section through the first transition reinforcing rib.

Optionally, the damper mounting portion includes a longitudinal reinforcement cavity formed by recessing a side of the rear wheel housing body toward the inside of the vehicle.

Optionally, the damper mounting portion further includes a damper mounting boss formed by the rear wheel cover body protruding toward one side of the outside of the automobile, the longitudinal reinforcing cavities are provided with a plurality of at intervals along the front-rear direction, and the damper mounting boss is located between two adjacent longitudinal reinforcing cavities.

Optionally, a horizontal reinforcing rib is arranged in the longitudinal reinforcing cavity between the two shock absorber mounting bosses; and/or the number of the groups of groups,

a second transition reinforcing rib is arranged at one end, facing the upper part of the automobile, of the shock absorber installation boss; and/or the number of the groups of groups,

the back of the shock absorber installation boss forms a concave cavity, and a cross reinforcing rib is arranged in the concave cavity.

Optionally, the vehicle body rear part structure further comprises a D column joint, a C column joint, a D column reinforcing plate, a C column reinforcing plate, a D column upper beam and a C column upper beam, wherein one ends of the two rear wheel covers facing the front of the vehicle are respectively connected with the lower ends of the C column joints through the corresponding C column reinforcing plates, the C column upper beam is connected between the upper ends of the two C column joints, and the rear wheel covers, the C column reinforcing plates, the C column joints, the C column upper beam and the first floor beam enclose to form a first force transmission ring;

the rear floor body further comprises a second floor beam, the second floor beam is arranged between the two rear longitudinal beams, one end, facing the rear of the automobile, of the rear wheel cover is connected with the lower end of the D column joint through corresponding D column reinforcing plates, the upper ends of the D column joints are connected with the D column upper beam, and the rear wheel cover, the D column reinforcing plates, the D column joints, the D column upper beam and the second floor beam enclose to form a second force transmission ring.

Optionally, the D-pillar joint is formed by integral die casting, and/or the C-pillar joint is formed by integral die casting.

In a second aspect, the present invention provides an automobile comprising the above-described vehicle body rear structure. The advantages of the automobile compared with the prior art are the same as those of the automobile body rear structure, and the description is not repeated.

Drawings

Fig. 1 is a schematic structural view of a vehicle body rear structure of an embodiment of the invention;

fig. 2 is an exploded structural view of a vehicle body rear structure of an embodiment of the present invention;

FIG. 3 is a schematic view of a rear wheel cover from a first perspective in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a rear wheel cover from a second perspective in accordance with an embodiment of the present invention;

FIG. 5 is a sectional view of the rear wheel cover and extension of an embodiment of the present invention;

FIG. 6 is a sectional view of a rear wheel cover and rear side rail of an embodiment of the present invention;

fig. 7 is a schematic structural view of a vehicle body rear structure of an embodiment of the invention;

fig. 8 is a schematic diagram of a connection structure of a C-pillar joint, a D-pillar joint, a roof rail, and a triangular window cross member according to an embodiment of the present invention.

Reference numerals illustrate:

1. a rear floor body; 11. a rear side member; 111. a rear side member body; 112. flanging; 12. a first floor beam; 121. an extension section; 13. a second floor beam; 2. a rear wheel cover; 21. a rear wheel cover body; 211. a first transition reinforcing rib; 212. a damper mounting boss; 2121. a damper mounting hole; 2122. a second transition reinforcing rib; 2123. cross reinforcing ribs; 213. a longitudinal stiffening cavity; 2131. horizontal reinforcing ribs; 22. a stringer connecting section; 221. a first connection section; 222. a second connection section; 23. a beam connection section; 31. a first connector; 32. a second connector; 41. a roof side rail; 42. triangular window cross beams; 43. a D column joint; 44. a C-pillar joint; 5. d column reinforcing plates; 6. a C column reinforcing plate; 7. a D column upper cross beam; 8. and C column upper cross beam.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "coupled," and "mated" are to be construed broadly, and may be, for example, fixedly coupled, detachably coupled, or integrally coupled; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

In addition, in the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", etc. in the embodiments indicate terms of orientation, and only for simplifying the positional relationship of the description based on the drawings of the specification, it does not represent that the elements and devices etc. referred to must be operated according to the operations and methods and configurations defined in the specific orientation and limitation of the present invention, and such orientation terms do not constitute limitations of the present invention.

An XYZ coordinate system is established herein, wherein the X-axis represents the front of the car, the X-axis forward represents the rear of the car, the Y-axis reverse represents the left-right direction of the car, the Y-axis forward represents the right-hand direction of the car, and the Z-axis up-down direction of the car, wherein the Z-axis forward represents the upper direction of the car, and the Z-axis reverse represents the lower direction of the car.

As shown in fig. 1-2, an embodiment of the present invention provides a rear structure of a vehicle body, including a rear floor body 1 and two rear wheel covers 2, where the rear floor body 1 includes two rear stringers 11 and a first floor cross member 12, the first floor cross member 12 is disposed between the two rear stringers 11, shock absorber mounting portions are disposed on the two rear wheel covers 2, one ends of the two rear wheel covers 2 facing the lower side of the vehicle are detachably connected with the corresponding rear stringers 11, two ends of the first floor cross member 12 extend upward of the vehicle to form an extension section 121, and one ends of the two rear wheel covers 2 facing the front side of the vehicle are detachably connected with the corresponding extension section 121.

Specifically, the rear floor body 1 may include two floor beams and two rear stringers 11, the rear stringers 11 extend along the direction shown in the X-axis, and two front and rear floor beams are disposed between the two rear stringers 11, wherein one floor beam is a first floor beam 12, and the left and right ends of the first floor beam 12 extend upward to form a C-shaped structure with an upward opening. The rear wheel covers 2 are respectively arranged on the left side and the right side of the automobile, the two rear wheel covers 2 have the same structure and are symmetrically arranged about the X axis.

In the present embodiment, the end of the rear wheel cover 2 facing the lower side of the automobile is detachably connected to the rear side member 11, and the end of the rear wheel cover 2 facing the front side of the automobile is detachably connected to the extension 121 of the first floor cross member 12, thereby realizing the detachable connection of the rear wheel cover 2 to the rear floor body 1. The rear wheel cover 2 is provided with the shock absorber installation part, and according to the requirements of different vehicle types or different wheelbases, the position of the rear shock absorber installation part can be adjusted only by replacing the rear wheel cover 2, so that the rear floor body 1 is universal, the framework bandwidth is large, and the development cost of a die is reduced. Meanwhile, the rear wheel cover 2 and the rear floor body 1 are separately arranged, namely the rear wheel cover 2 is independently formed, the die casting of the rear wheel cover 2 is particularly carried out, when a die of the inner surface (the surface close to one side in a vehicle) of the die casting rear wheel cover 2 is drawn, the die can be drawn in the Z direction (the height direction of the vehicle) or in the Y direction (the left and right directions of the vehicle), proper reinforcing ribs can be machined on the shock absorber mounting part of the rear wheel cover 2 according to requirements, so that the force transmission requirement can be better met, in addition, the forming die of the rear wheel cover 2 is smaller, the distance between any position of the rear wheel cover 2 and a pouring opening of the die is relatively close, the die casting expansion rate of the rear wheel cover 2 is improved, the die casting expansion rate of the rear wheel cover 2 can be improved from 5% to about 10%, the rigidity of the shock absorber mounting part on the rear wheel cover 2 is ensured, and the safety performance of the vehicle is improved. In some extreme cases, the damper mounting portion fails in strength or the rear wheel housing 2 collides with the crush deformation, which can be replaced easily.

As shown in fig. 1 and 6, optionally, the rear wheel cover 2 includes a rear wheel cover body 21 and a longitudinal beam connecting section 22, the longitudinal beam connecting section 22 is connected with one end of the rear wheel cover body 21 facing the lower side of the automobile, the longitudinal beam connecting section 22 includes a first connecting section 221 and a second connecting section 222 which are connected with each other and are arranged at an angle, the rear longitudinal beam 11 includes a rear longitudinal beam body 111 and a flange 112 which are connected with each other and are arranged at an angle, the first connecting section 221 is in fit connection with the rear longitudinal beam body 111, and the second connecting section 222 is in fit connection with the flange 112.

Specifically, the rear wheel casing body 21 and the longitudinal beam connecting section 22 are integrally formed, the longitudinal beam connecting section 22 can be in an L shape, the rear longitudinal beam body 111 is approximately rectangular and comprises a first connecting section 221 which is arranged in a Y direction and a second connecting section 222 which is arranged in a Z direction, one end, close to the outside of an automobile, of the rear longitudinal beam body 111 is provided with a flange 112 which extends upwards, the first connecting section 221 is connected with the upper surface of the rear longitudinal beam body 111 in a fitting manner, structural adhesive can be coated at the connecting position and is connected through an FDS (fully drawn wire) circulation screw connection technology, tensile performance can be provided for Z-direction connection, the second connecting section 222 is connected with the flange 112 in a fitting manner, structural adhesive can be coated at the connecting position and is riveted through rivets, and the shearing resistance of the rivets can be fully utilized by Y-direction connection.

In this embodiment, the longitudinal beam connecting section 22 at the lower end of the rear wheel cover 2 is connected with the rear longitudinal beam 11 in a double manner in the Y direction and the Z direction, so that the tensile and shearing resistance performances are improved, the connection stability between the rear wheel cover 2 and the rear longitudinal beam 11 is ensured, and the torsional rigidity and the rear torsion mode of the whole vehicle are improved.

The rear wheel cover 2 may refer to the whole rear wheel cover, or may refer to a portion of the rear wheel cover, or a portion of the rear wheel cover provided with the damper mounting portion, and surrounds the rear wheel cover with other portions of the rear floor body 1 to form the whole rear wheel cover, and the portion of the rear wheel cover provided with the damper mounting portion needs to be reinforced.

As shown in fig. 1 and 5, optionally, the rear wheel cover 2 further includes a beam connecting section 23, the beam connecting section 23 is connected with an end of the rear wheel cover body 21 facing the front of the vehicle, the beam connecting section 23 is connected with the extension section 121 through a first connecting piece 31 and a second connecting piece 32, and the first connecting piece 31 and the second connecting piece 32 are arranged in a dislocation manner.

In this embodiment, the beam connecting section 23 and the rear wheel casing body 21 are integrally formed, the first connecting member 31 and the second connecting member 32 may be rivets or bolts, and the rivets may be directly used for extrusion deformation to realize riveting between the two, and if bolting is adopted, bolt holes need to be machined in advance on the beam connecting section 23 and the extension section 121.

The beam connecting section 23 is gradually bent towards the inside of the automobile from top to bottom, the first connecting piece 31 is arranged at intervals in the bending direction of the beam connecting section 23, the second connecting piece 32 is similar to the first connecting piece 31, that is, the first connecting piece 31 and the second connecting piece 32 are respectively provided with a row, and the dislocation arrangement of the first connecting piece 31 and the second connecting piece 32 means that: a second connecting piece 32 is arranged between the two first connecting pieces 31, so that the connecting line of every adjacent three connecting pieces forms a triangle from top to bottom, and the connecting stability between the cross beam connecting section 23 or the rear wheel cover 2 and the extension section 121 can be improved by adopting the arrangement mode. Structural glue may be provided at the junction of the beam connecting section 23 and the extension section 121.

As shown in fig. 5, alternatively, an end of the rear wheel housing body 21 toward the front of the vehicle is bent toward the vehicle interior side to form a first transitional reinforcement rib 211, and the rear wheel housing body 21 is smoothly transitional coupled to the cross member connecting section 23 by the first transitional reinforcement rib 211.

In this embodiment, the first transition reinforcing rib 211 is an R-angle transition reinforcing rib, and the rear wheel cover body 21 is connected with the beam connecting section 23 in a smooth transition manner through the R-angle transition reinforcing rib, and the outer surface of the beam connecting section 23, that is, the surface facing the outside of the air side is connected with the extending section 121 in a fitting manner, so as to ensure the strength of the lap joint between the beam connecting section 23 and the extending section 121.

As shown in fig. 4, the damper mounting portion may alternatively include a longitudinal reinforcing cavity 213, the longitudinal reinforcing cavity 213 being formed by recessing the rear wheel housing body 21 toward the vehicle interior side.

In this embodiment, the longitudinal reinforcing cavity 213 may be an arc reinforcing cavity that is curved along the Z direction, and the extending direction of the longitudinal reinforcing cavity 213 is matched with the rear wheel cover body 21, so as to transfer the load transferred from the shock absorber to the rear wheel cover 2 to the rear longitudinal beam 11 with higher strength, thereby greatly improving the dynamic and static stiffness of the shock absorber installation portion in the Y direction.

As shown in fig. 4, optionally, the damper mounting part further includes a damper mounting boss 212, the damper mounting boss 212 is formed by protruding the rear wheel housing body 21 toward one side of the vehicle exterior, the longitudinal reinforcing cavities 213 are provided in plurality at intervals in the vehicle front-rear direction, and the damper mounting boss 212 is located between two adjacent longitudinal reinforcing cavities 213.

In this embodiment, three longitudinal reinforcing cavities 213 may be disposed at intervals along the front-rear direction of the automobile, a damper mounting boss 212 is disposed between two adjacent longitudinal reinforcing cavities 213, the damper mounting boss 212 may be a square boss, a vertically through damper mounting hole 2121 is disposed at the bottom of the damper mounting boss 212, and a damper is mounted between the damper mounting holes of the two damper mounting bosses 212. The damper mounting boss 212 is formed by protruding the rear wheel housing body 21 outward, that is, the damper mounting portion is integrally formed with the rear wheel housing body 21, ensuring strength. By recessing the sides of the damper mounting boss 212 in opposite directions to form the longitudinal reinforcing cavity 213, which is equivalent to increasing the bending resistance section of the damper mounting boss 212, it is advantageous to improve the structural strength of the damper mounting boss 212.

As shown in fig. 3-4, optionally, a horizontal stiffener 2131 is provided within the longitudinal stiffener cavity 213 between two of the shock absorber mounting bosses 212. The horizontal reinforcing ribs 2131 are arranged along the direction generally indicated by the X axis, two ends of the horizontal reinforcing ribs 2131 along the X direction are respectively connected with two opposite side walls of the longitudinal reinforcing cavity 213, the horizontal reinforcing ribs 2131 can be used for reinforcing the strength of the middle longitudinal reinforcing cavity 213, the shock absorber mounting bosses 212 on two sides are prevented from being deformed, and the horizontal reinforcing ribs 2131 are not arranged in the longitudinal reinforcing cavities 213 on two sides, so that the strength is improved, the overall weight is reduced, and the light weight is facilitated.

The end of the damper mounting boss 212 facing upward of the vehicle is provided with a second transition bead 2122. The second transition rib 2122 may be an R-angle transition rib, and the damper mounting boss 212 may be smoothly connected to the surrounding rear wheel cover body 21 through the second transition rib 2122 to strengthen the damper mounting portion.

The damper mounting boss 212 may be formed by partially bending outward of the rear wheel housing 2, and a recess is formed in the rear surface of the damper mounting boss 212, i.e., the surface facing the inside of the automobile, and a cross rib 2123 is provided in the recess. The cross rib 2123 includes two ribs disposed in a crossing manner, and the strength of the damper mounting boss 212 is increased by the cross rib 2123 to strengthen the damper load transmission path. After the cross reinforcing ribs 2123 are die-cast, the upper die is required to be removed along the Y direction, and the rear wheel cover 2 and the rear floor body 1 are detachably arranged, so that the structure form of the cross reinforcing ribs 2123 is flexibly arranged on the inner side surface of the rear wheel cover 2.

As shown in fig. 7, optionally, the rear structure of the vehicle body further includes a D-pillar joint 43, a C-pillar joint 44, a D-pillar reinforcing plate 5, a C-pillar reinforcing plate 6, a D-pillar upper beam 7, and a C-pillar upper beam 8, wherein one ends of the two rear wheel covers 2 facing the front of the vehicle are respectively connected with the lower ends of the C-pillar joint 44 through the corresponding C-pillar reinforcing plates 6, the C-pillar upper beam 8 is connected between the upper ends of the two C-pillar joints 44, and the rear wheel covers 2, the C-pillar reinforcing plates 6, the C-pillar joint 44, the C-pillar upper beam 8, and the first floor beam 12 enclose to form a first force transmission ring;

the rear floor body 1 further comprises a second floor beam 13, the second floor beam 13 is arranged between the two rear longitudinal beams 11, one end, facing the rear of the automobile, of the rear wheel cover 2 is connected with the lower end of the D column joint 43 through corresponding D column reinforcing plates 5, the upper ends of the D column joints 43 are connected with the D column upper beam 7, and the rear wheel cover 2, the D column reinforcing plates 5, the D column joints 43, the D column upper beam 7 and the second floor beam 13 are enclosed to form a second force transmission ring.

In this embodiment, a first floor beam 12 and a second floor beam 13 are disposed between two rear stringers 11, where the first floor beam is located in front of the second floor beam 13, an extension 121 at the left end of the first floor beam 12 is connected to a left C-pillar joint 44 through a corresponding C-pillar reinforcing plate 6, an extension 121 at the right end of the first floor beam 12 is connected to a right C-pillar joint 44 through a corresponding C-pillar reinforcing plate 6, the rear end of the rear wheel cover 2 on the left is connected to a left D-pillar joint 43 through a corresponding D-pillar reinforcing plate 5, the rear end of the rear wheel cover 2 on the right is connected to a right D-pillar joint 43 through a corresponding D-pillar reinforcing plate, the rear wheel cover 2, the C-pillar joint 44, the C-pillar upper beam 8 and the first floor beam 12 enclose a first force transmission ring, and the rear wheel cover 2, the D-pillar reinforcing plate 5, the D-pillar joint 43, the D-pillar upper beam 7 and the second floor beam 13 enclose a second force transmission ring. The load of the shock absorber is effectively decomposed into the vehicle body through the double force transmission closed loop channels, the strength and durability of the vehicle body are improved, and the overall bearing capacity and bandwidth of the rear structure of the vehicle body are improved. By adopting the structure, the rear torsion mode of the automobile body and the NVH performance of the whole automobile can be greatly improved, the vibration and noise in the driving process are reduced, and the comfort of a driver and passengers is improved.

As shown in fig. 7-8, the D-pillar joint 43 may alternatively be integrally die cast; and/or the number of the groups of groups,

the C-pillar joint 44 is integrally die-cast.

In the present embodiment, the ends of the C-pillar joint 44 and the D-pillar joint 43 are connected by the roof rail 41 and the triangular window cross rail 42, respectively. The C column joint 44 and the D column joint 43 are cast aluminum joint pieces, are integrally formed by die casting, can be provided with back door hinge mounting holes, and are high in structural integration level, good in light weight effect, high in structural rigidity and high in bearing capacity. In other embodiments, the C-pillar joint 44, D-pillar joint 43, roof rail 41, and triangular window cross rail 42 may be integrally die cast.

The C pillar joint 44 and the D pillar joint 43 are disposed obliquely from bottom to top approximately toward the vehicle interior, the triangular window cross beam 42 is located at the outer side of the vehicle compared with the roof side rail 41, the triangular window cross beam 42 and the two rear side rails 11 are disposed around to form a cage-like structure, diagonal deformation of the vehicle body rear door and the rear back door opening can be greatly reduced, torsional rigidity of the vehicle body can be improved, and the torsional rigidity can reach 3800n.m/deg. The rear door opening of the vehicle body is generally formed by enclosing a C column, a D column and other parts of the vehicle body.

A further embodiment of the present invention provides an automobile including the above-described vehicle body rear structure. The advantages of the automobile compared with the prior art are the same as those of the automobile body rear structure, and the description is not repeated.

Although the invention is disclosed above, the scope of the invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications will fall within the scope of the invention.

Claims (10)

1. The utility model provides a rear structure of vehicle body, its characterized in that includes rear floor body (1) and two rear wheel covers (2), rear floor body (1) include two back longerons (11) and first floor crossbeam (12), two be equipped with between back longeron (11) first floor crossbeam (12), two be equipped with bumper shock absorber installation department on rear wheel cover (2) respectively, two rear wheel cover (2) towards the one end of car below respectively with corresponding back longeron (11) detachable connection, the both ends of first floor crossbeam (12) extend respectively to car top in order to form extension section (121), two rear wheel cover (2) towards the one end of car front respectively with corresponding extension section (121) detachable connection.

2. The vehicle body rear structure according to claim 1, characterized in that the rear wheel cover (2) includes a rear wheel cover body (21) and a side member connecting section (22), the side member connecting section (22) is connected with one end of the rear wheel cover body (21) toward the vehicle lower side, the side member connecting section (22) includes a first connecting section (221) and a second connecting section (222) which are connected to each other and are disposed at an angle to each other, the rear side member (11) includes a rear side member body (111) and a flange (112) which are connected to each other and are disposed at an angle to each other, the first connecting section (221) is bonded to the rear side member body (111), and the second connecting section (222) is bonded to the flange (112).

3. The vehicle body rear structure according to claim 2, characterized in that the rear wheel cover (2) further includes a cross member connecting section (23), the cross member connecting section (23) is connected with one end of the rear wheel cover body (21) facing the front of the vehicle, the cross member connecting section (23) is connected with the extension section (121) through a first connecting piece (31) and a second connecting piece (32), and the first connecting piece (31) and the second connecting piece (32) are arranged in a staggered manner.

4. A vehicle body rear structure according to claim 3, characterized in that an end of the rear wheel house body (21) facing the front of the vehicle is bent to the vehicle interior side to form a first transitional reinforcing bead (211), and the rear wheel house body (21) is smoothly transitional connected with the cross member connecting section (23) through the first transitional reinforcing bead (211).

5. The vehicle body rear structure according to claim 2, characterized in that the damper mounting portion includes a longitudinal reinforcement cavity (213), the longitudinal reinforcement cavity (213) being formed by the rear wheel house body (21) being recessed toward the vehicle interior side.

6. The vehicle body rear structure according to claim 5, characterized in that the damper mounting portion further includes a damper mounting boss (212), the damper mounting boss (212) is formed by the rear wheel house body (21) protruding toward the vehicle exterior side, the longitudinal reinforcing cavities (213) are provided in plurality at intervals in the vehicle front-rear direction, and the damper mounting boss (212) is located between adjacent two of the longitudinal reinforcing cavities (213).

7. The vehicle body rear structure according to claim 6, characterized in that a horizontal reinforcing rib (2131) is provided in the longitudinal reinforcing cavity (213) between two of the damper mounting bosses (212); and/or the number of the groups of groups,

a second transition reinforcing rib (2122) is arranged at one end, facing the upper part of the automobile, of the shock absorber installation boss (212); and/or the number of the groups of groups,

the back of the shock absorber installation boss (212) forms a concave cavity, and a cross reinforcing rib (2123) is arranged in the concave cavity.

8. The vehicle body rear structure according to claim 1, further comprising a D-pillar joint (43), a C-pillar joint (44), a D-pillar reinforcement plate (5), a C-pillar reinforcement plate (6), a D-pillar upper cross member (7), and a C-pillar upper cross member (8), wherein one ends of the two rear wheel covers (2) facing forward are respectively connected with the lower ends of the C-pillar joints (44) through the corresponding C-pillar reinforcement plates (6), the C-pillar upper cross member (8) is connected between the upper ends of the two C-pillar joints (44), and the rear wheel covers (2), the C-pillar reinforcement plate (6), the C-pillar joint (44), the C-pillar upper cross member (8), and the first floor cross member (12) enclose to form a first force transmission ring;

the rear floor body (1) further comprises a second floor beam (13), the second floor beam (13) is arranged between the rear longitudinal beams (11), the two rear wheel covers (2) are respectively connected with the lower ends of the D column joints (43) through corresponding D column reinforcing plates (5), the two upper ends of the D column joints (43) are connected with the D column upper beam (7), the rear wheel covers (2), the D column reinforcing plates (5), the D column joints (43), the D column upper beam (7) and the second floor beam (13) are enclosed to form a second force transmission ring.

9. The vehicle body rear structure according to claim 8, characterized in that the D-pillar joint (43) is integrally die-cast; and/or the number of the groups of groups,

the C-pillar joint (44) is integrally formed by die casting.

10. An automobile comprising the vehicle body rear structure according to any one of claims 1 to 9.