A vehicle body rear structure and a vehicle body rear assembly

Abstract

The application discloses a rear body structure and a rear body assembly, wherein the rear body structure is annularly arranged and comprises a top cross beam, two side wall reinforcing assemblies and a bottom cross beam; the top cross beam is used for being connected with a top of a carriage to support the top of the carriage; the two side wall reinforcing assemblies are fixedly installed on rear side wall panels of the body; each side wall reinforcing assembly comprises a first connecting part and a second connecting part; one end of the top cross beam is fixedly connected with the first connecting part of one side wall reinforcing assembly; the other end of the top cross beam is fixedly connected with the first connecting part of the other side wall reinforcing assembly; and the bottom cross beam is used for being connected with a bottom of the carriage; one end of the bottom cross beam is fixedly connected with the second connecting part of one side wall reinforcing assembly; and the other end of the bottom cross beam is fixedly connected with the second connecting part of the other side wall reinforcing assembly. The application aims at solving the problem that the body is not light enough in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts, in particular to a rear body structure and a rear body assembly. BACKGROUND

[0002] In the prior art, in order to improve the torsional stiffness of the whole vehicle and improve the riding experience of the rear passengers, engineers generally arrange a partition plate at the rear of the vehicle body to connect the left and right side walls. In addition, the partition plate can also provide a storage space for the passengers to place pillows and other small items, and provide mounting space for the rear seat belt retractor mounting structure. However, since the partition plate spans the entire vehicle body in the width direction, its arrangement is not conducive to the lightweighting requirements of the overall vehicle body. SUMMARY

[0003] The main purpose of the present application is to provide a rear body structure and a rear body assembly, which aims to solve the problem of excessive weight of the vehicle body caused by the rear body partition plate structure in the prior art, thereby adversely affecting the lightweighting of the overall vehicle body.

[0004] To achieve the above purpose, the present application provides a rear body structure, wherein the rear body structure is arranged in a ring shape, and the rear body structure comprises:

[0005] a top cross beam for connecting with the top of the vehicle cabin to support the top of the vehicle cabin;

[0006] two side wall reinforcement assemblies for fixedly mounting on the rear body side wall panel, each of the side wall reinforcement assemblies comprises a first connecting portion and a second connecting portion, wherein the first connecting portion of one of the side wall reinforcement assemblies is fixedly connected with one end of the top cross beam, and the first connecting portion of the other side wall reinforcement assembly is fixedly connected with the other end of the top cross beam; and

[0007] a bottom cross beam for connecting with the bottom of the vehicle cabin, one end of the bottom cross beam is fixedly connected with the second connecting portion of one of the side wall reinforcement assemblies, and the other end of the bottom cross beam is fixedly connected with the second connecting portion of the other side wall reinforcement assembly.

[0008] Optionally, each of the side wall reinforcement assemblies comprises:

[0009] a C-ring connecting plate and a C-ring connecting reinforcement plate, one end of the C-ring connecting plate is fixedly connected with the top cross beam, the C-ring connecting reinforcement plate is fixedly connected with the side edge of the C-ring connecting plate, and the C-ring connecting reinforcement plate is used to connect the C-ring connecting plate, the rear body side wall panel and the rear wheel cover assembly; and

[0010] A C-ring assembly is connected to a C-ring connecting plate on one side and connected to the bottom cross beam on the other side, and is arranged in an included angle between the rear wheel cover assembly and the bottom of the carriage;

[0011] The first connecting part comprises the C-ring connecting plate and the C-ring connecting reinforcing plate.

[0012] The second connecting part comprises the C-ring assembly.

[0013] Optionally, the C-ring connecting plate and the C-ring connecting reinforcing plate are connected by welding; and / or,

[0014] The C-ring connecting reinforcing plate, the rear side wall plate of the vehicle body and the rear wheel cover assembly are connected by welding and bolting.

[0015] Optionally, the C-ring assembly and the C-ring connecting plate are connected by welding and bolting; and / or,

[0016] The C-ring assembly and the bottom cross beam are connected by welding.

[0017] The application further provides a rear body assembly, which comprises a rear body structure, and the rear body structure comprises:

[0018] A top cross beam is arranged to be connected to the top of the carriage to support the top of the carriage.

[0019] Two side wall reinforcing assemblies are arranged to be fixedly connected to the rear side wall plate of the vehicle body, and each side wall reinforcing assembly comprises a first connecting part and a second connecting part, wherein one end of the top cross beam is fixedly connected to the first connecting part of one side wall reinforcing assembly, and the other end of the top cross beam is fixedly connected to the first connecting part of the other side wall reinforcing assembly.

[0020] A bottom cross beam is arranged to be connected to the bottom of the carriage, one end of the bottom cross beam is fixedly connected to the second connecting part of one side wall reinforcing assembly, and the other end of the bottom cross beam is fixedly connected to the second connecting part of the other side wall reinforcing assembly.

[0021] The rear body assembly further comprises:

[0022] A rear side wall plate of the vehicle body is fixedly connected to the rear body structure.

[0023] A rear wheel cover assembly is fixedly connected to the rear body structure, and the rear wheel cover assembly is arranged below the rear side wall plate of the vehicle body.

[0024] A safety belt mounting bracket is arranged on the rear body structure.

[0025] a seat belt retractor for winding and unwinding a seat belt, mounted to one end of the seat belt mounting bracket; and

[0026] a buckle mounting bracket for mounting a rear seat buckle, arranged on the other end of the seat belt mounting bracket and fixedly connected with the seat belt mounting bracket.

[0027] Optionally, each of the side wall reinforcing assemblies comprises a C-ring connecting reinforcing plate.

[0028] The seat belt mounting bracket is arranged on the C-ring connecting reinforcing plate, one end of the seat belt mounting bracket is fixedly connected with the C-ring connecting reinforcing plate, and one side end of the seat belt mounting bracket is fixedly connected with the rear side wall panel of the vehicle body.

[0029] Optionally, the seat belt mounting bracket comprises:

[0030] a first mounting portion for mounting the seat belt retractor, one end of the first mounting portion is fixedly connected with the C-ring connecting reinforcing plate, and one side end of the first mounting portion is fixedly connected with the rear side wall panel of the vehicle body.

[0031] a second mounting portion, one end of which is used for fixedly connecting the buckle mounting bracket, and one side end of the second mounting portion is fixedly connected with the rear side wall panel of the vehicle body; and

[0032] a bending connecting portion for connecting the first mounting portion and the second mounting portion, arranged in a bending manner.

[0033] Optionally, one end of the first mounting portion is fixedly connected with the C-ring connecting reinforcing plate in a welding manner, and one side end of the first mounting portion is fixedly connected with the rear side wall panel of the vehicle body in a welding manner; and / or,

[0034] one end of the second mounting portion is fixedly connected with the buckle mounting bracket in a welding manner, and one side end of the second mounting portion is fixedly connected with the rear side wall panel of the vehicle body in a welding manner.

[0035] Optionally, the bottom of the buckle mounting bracket is fixedly connected with the rear wheel cover assembly, and / or,

[0036] the side of the buckle mounting bracket is fixedly connected with the rear side wall panel of the vehicle body.

[0037] Optionally, the bottom of the buckle mounting bracket is fixedly connected with the rear wheel cover assembly in a welding manner, and / or,

[0038] the side of the buckle mounting bracket is fixedly connected with the rear side wall panel of the vehicle body in a welding manner.

[0039] In the technical scheme of the present application, the rear body structure is annularly arranged, and the rear body structure comprises a top beam, two side wall reinforcing assemblies and a bottom beam. The top beam is used to connect with the top of the vehicle cabin to support the top of the vehicle cabin, and the two ends of the top beam can also be used to connect relevant components. The two side wall reinforcing assemblies are used to be fixedly installed on the rear side wall panels of the vehicle body, and each side wall reinforcing assembly comprises a first connecting portion and a second connecting portion. One end of the top beam is fixedly connected with the first connecting portion of one side wall reinforcing assembly, and the other end of the top beam is fixedly connected with the first connecting portion of the other side wall reinforcing assembly. The bottom beam is used to connect with the bottom of the vehicle cabin, one end of the bottom beam is fixedly connected with the second connecting portion of one side wall reinforcing assembly, and the other end of the bottom beam is fixedly connected with the second connecting portion of the other side wall reinforcing assembly. That is, the two ends of the top beam and the first connecting portions of the two side wall reinforcing assemblies are connected, and the two ends of the bottom beam and the second connecting portions of the two side wall reinforcing assemblies are connected to form an annular structure. The annular structure is fixedly connected with the rear body. In addition, since the top beam structure is fixedly connected with the top of the vehicle cabin, the top beam structure can be used as a reinforcing rib of the top of the vehicle cabin. Without changing the thickness of the top of the vehicle cabin, the overall strength and rigidity of the top of the vehicle cabin can be improved, deformation or torsion is not easy to occur under external force, material consumption is saved, the weight of the vehicle body is reduced, and the same effect can be achieved by the bottom beam and the rear side wall panels of the vehicle body. The annular structure formed by the top beam, the two side wall reinforcing assemblies and the bottom beam can replace the rear body partition plate structure in the prior art to improve the torsional rigidity of the vehicle. At the same time, since the rear body partition plate structure is cancelled, the weight of the vehicle body is reduced, and the lightweight requirement of the vehicle body is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0041] Figure 1 It is a three-dimensional schematic view of the rear body partition plate assembly in the prior art.

[0042] Figure 2 It is a three-dimensional schematic view of the rear body partition plate structure in the prior art. Figure 1

[0043] Figure 3 It is a three-dimensional schematic view of an embodiment of the rear body structure provided by the present application from one perspective.​

[0044] Figure 4 for Figure 3 A perspective view of an embodiment of the rear structure of the vehicle body;

[0045] Figure 5 for Figure 3 A perspective view of an embodiment of the middle side reinforcement component and bottom crossbeam;

[0046] Figure 6 for Figure 3 A perspective view of an embodiment of the middle side reinforcement assembly and bottom crossbeam;

[0047] Figure 7 for Figure 3 A three-dimensional schematic diagram of the C-ring connecting plate from one perspective;

[0048] Figure 8 A perspective view of an embodiment of the rear vehicle assembly provided by the present invention;

[0049] Figure 9 for Figure 8 A three-dimensional schematic diagram of the installation of the center seat belt mounting bracket from a first-view perspective;

[0050] Figure 10 for Figure 8 A three-dimensional schematic diagram of the assembly of the seat belt retractor and seat belt mounting bracket;

[0051] Figure 11 for Figure 8 A three-dimensional schematic diagram of the middle seat belt mounting bracket assembly from another perspective;

[0052] Figure 12 for Figure 8 A three-dimensional schematic diagram of the seatbelt mounting bracket;

[0053] Figure 13 for Figure 8 A three-dimensional schematic diagram of the assembly of the seat belt mounting bracket and the buckle mounting bracket.

[0054] Explanation of icon numbers:

[0055] Reference Name Reference Name 100 Body rear structure 4 Body rear quarter panel 1 Top cross beam 5 Rear wheel house assembly 2 Side reinforcement assembly 6 Safety belt mounting bracket 21 First connecting portion 61 First mounting portion 211 C-ring connecting plate 62 Second mounting portion 212 C-ring connecting reinforcement plate 63 Bent connecting portion 22 Second connecting portion 7 Safety belt retractor 221 C-ring assembly 8 Lock catch mounting bracket 3 Bottom cross beam 200 Body rear bulkhead assembly 1000 Body rear assembly 9 Bulkhead

[0056] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0057] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0058] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, motion condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0059] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0060] In the prior art, in order to improve the torsional stiffness of the whole vehicle and improve the riding experience of the rear passengers, the engineers generally arrange a partition plate at the rear of the vehicle body to connect the left and right side walls. In addition, the partition plate can also provide a storage space for the passengers to place pillows and other small items, and provide mounting space for the rear seat belt retractor mounting structure. However, since the partition plate spans the entire vehicle body in the width direction, its arrangement is not conducive to the lightweight demand of the overall vehicle body.

[0061] In view of this, the present application provides a vehicle body rear structure and a vehicle body rear assembly, Figures 1-2 is a schematic view of the partition plate assembly in the prior art, Figures 3-13 The embodiments of the vehicle body rear structure and the vehicle body rear assembly provided by the present application will be described below in conjunction with specific drawings.

[0062] Please refer to Figures 3-4In the technical scheme of the present application, the rear body structure 100 is annularly arranged, and comprises a top beam 1, two side wall reinforcing assemblies 2 and a bottom beam 3. The top beam 1 is used to connect with the top of the vehicle compartment to support the top of the vehicle compartment, and the two ends of the top beam 1 can also be used to connect relevant components. The two side wall reinforcing assemblies 2 are fixedly installed on the rear side wall panels 4 of the vehicle body, and each side wall reinforcing assembly 2 comprises a first connecting portion 21 and a second connecting portion 22. One end of the top beam 1 is fixedly connected with the first connecting portion 21 of one side wall reinforcing assembly 2, and the other end of the top beam 1 is fixedly connected with the first connecting portion 21 of the other side wall reinforcing assembly 2. The bottom beam 3 is used to connect with the bottom of the vehicle compartment, one end of the bottom beam 3 is fixedly connected with the second connecting portion 22 of one side wall reinforcing assembly 2, and the other end of the bottom beam 3 is fixedly connected with the second connecting portion 22 of the other side wall reinforcing assembly 2.

[0063] That is, in the technical scheme of the present application, the rear body structure is connected by the two ends of the top beam 1 and the first connecting portions 21 of the two side wall reinforcing assemblies 2, and the two ends of the bottom beam 3 and the second connecting portions 22 of the two side wall reinforcing assemblies 2, to form an annular structure. The annular structure is fixedly connected with the rear body, and the top beam 1 is fixedly connected with the top of the vehicle compartment and can be used as a reinforcing rib of the top of the vehicle compartment. In this way, the overall strength and rigidity of the top of the vehicle compartment can be improved without changing the thickness of the top of the vehicle compartment, and the material usage is saved and the weight of the vehicle body is reduced. Similarly, the bottom beam 3 and the rear side wall panels 4 of the vehicle body can also have the same effect, and the annular structure formed by the bottom beam 3 and the two side wall reinforcing assemblies 2 can replace the rear body partition plate structure in the prior art to improve the torsional rigidity of the vehicle. At the same time, the rear body partition plate structure is cancelled, the weight of the vehicle body is reduced, and the lightweight requirement of the vehicle body is met.

[0064] For reference Figures 5-7Since the two side wall reinforcing assemblies 2 are symmetrically arranged, only the connection mode of one of the side wall reinforcing assemblies 2 is described, and the connection mode of the other side wall reinforcing assembly 2 is the same. In detail, the side wall reinforcing assembly 2 comprises a C-ring connecting plate, a C-ring connecting reinforcing plate and a C-ring assembly. The C-ring connecting plate is arranged in a top-down extending manner, the upper end of the C-ring connecting plate is fixedly connected with the top cross beam 1, the lower end of the C-ring connecting plate is fixedly connected with the C-ring assembly, the side edge of the C-ring connecting plate close to the vehicle head is fixedly connected with the C-ring connecting reinforcing plate, and the side edge of the C-ring connecting plate close to the vehicle tail is fixedly connected with the rear side wall plate 4 of the vehicle body. In addition, the C-ring connecting reinforcing plate is approximately trapezoidal in shape, the top side thereof is fixedly connected with the top cross beam 1, one side edge thereof is fixedly connected with the C-ring connecting plate, the other side edge thereof is fixedly connected with the rear side wall plate 4 of the vehicle body, and the bottom side thereof is connected with the rear wheel cover assembly 5. The C-ring assembly is connected with the lower end of the C-ring connecting plate on one side and connected with the bottom cross beam 3 on the other side, and is arranged in an included angle between the rear wheel cover assembly 5 and the bottom of the vehicle compartment, thereby playing a role in transition connection. The first connecting part 21 comprises the C-ring connecting plate and the C-ring connecting reinforcing plate, and the second connecting part 22 comprises the C-ring assembly.

[0065] Further, the C-ring connecting plate and the C-ring connecting reinforcing plate are connected by welding, in some other embodiments, structural glue connection or buckle structure design can also be used for connection. In this application, welding is used for connection. Welding is a commonly used metal connection method, and the structural strength after welding is relatively high, can bear a large load, and has high reliability, is not easy to loosen or fall off, can maintain a connected state for a long time, further improves the strength of the structure connection, and is beneficial to improving the torsional stiffness of the rear structure 100 of the vehicle body. In addition, the edges of the C-ring connecting plate and the C-ring connecting reinforcing plate are designed as a flange structure, which can facilitate welding and further improve the stability of the connection between the C-ring connecting plate and the C-ring connecting reinforcing plate. In addition, the C-ring connecting reinforcing plate and the top cross beam 1, the rear side wall plate 4 of the vehicle body and the rear wheel cover assembly 5 are connected by welding and bolt fixing. In some positions where welding is not convenient, the relevant structures can be first fixed by bolts, and then the next step of welding can be performed, which can strengthen the connection stability while facilitating the actual production operation.

[0066] In addition, in some embodiments, the C-ring assembly is C-shaped, used to connect the overall side wall reinforcement assembly 2 and the bottom cross beam 3 at the corner, and the periphery of the C-ring assembly is formed with a flange structure, facilitating welding and fixing with the rear wheel cover assembly 5 and the vehicle compartment bottom; in addition, the C-ring assembly and the C-ring connecting plate are connected by welding and bolting, and in some positions where welding is not convenient, the relevant structure can be first fixed by bolting, and then the next step of welding is carried out, which can improve the connection stability while facilitating the actual production operation; the C-ring assembly and the bottom cross beam 3 are connected by welding, which can further improve the strength of the structure connection and improve the torsional stiffness of the rear body structure 100.

[0067] Please refer to Figure 8 The application further provides a rear body assembly 1000, which comprises the rear body structure 100 and comprises the above-mentioned features, which will not be repeated here. Since the partition plate structure in the prior art is cancelled, the mounting position and mounting mode of the original safety belt winding structure need to be adjusted and changed accordingly, therefore, on the basis of the rear body structure 100, the rear body assembly 1000 further comprises relevant structures: a rear body side wall plate 4, a rear wheel cover assembly 5, a safety belt mounting bracket 6, a safety belt winder 7 and a lock buckle mounting bracket 8. The rear body side wall plate 4 is fixedly connected with the rear body structure 100; the rear wheel cover assembly 5 is fixedly connected with the rear body structure 100, and the rear wheel cover assembly 5 is located below the rear body side wall plate 4; the safety belt mounting bracket 6 is arranged on the rear body structure 100; the safety belt winder 7 is used for winding and unwinding a safety belt and is mounted on one end of the safety belt mounting bracket 6; and the lock buckle mounting bracket 8 is used for mounting a rear seat lock buckle, is arranged on the other end of the safety belt mounting bracket 6 and is fixedly connected with the safety belt mounting bracket 6, and the installation problems of the safety belt winder 7 and the lock buckle mounting bracket 8 are solved by adding the safety belt mounting bracket 6.

[0068] Please refer to Figures 9-11 Each of the side wall reinforcement assemblies 2 comprises a C-ring connecting reinforcement plate, the safety belt mounting bracket 6 is arranged on the C-ring connecting reinforcement plate, one end of the safety belt mounting bracket 6 is fixedly connected with the C-ring connecting reinforcement plate, and one side end of the safety belt mounting bracket 6 is fixedly connected with the rear body side wall plate 4, so that the stability of the safety belt bracket connection can be met, the strength of the safety belt winder 7 mounting point is improved, the corresponding laws and regulations can be met, and the safety of the passengers can be protected.

[0069] Further, please refer to Figure 12, the safety belt mounting bracket 6 is designed as an inverted "Z" shape, comprising a first mounting portion 61, a second mounting portion 62, and a bending portion. The first mounting portion 61 is provided with a mounting hole and can be used to mount the safety belt retractor 7. One end of the first mounting portion 61 is fixedly connected to the C-ring connecting reinforcement plate, and the side end of the first mounting portion 61 is fixedly connected to the rear side wall panel 4 of the vehicle body, further enhancing the stability of the safety belt mounting bracket 6. One end of the second mounting portion 62 is used to fixedly connect the lock buckle mounting bracket 8, and the side end of the second mounting portion 62 is fixedly connected to the rear side wall panel 4 of the vehicle body, further enhancing the stability of the safety belt mounting bracket 6. The bending connecting portion 63 is used to connect the first mounting portion 61 and the second mounting portion 62 and is designed as a bending structure.

[0070] In some other embodiments, the safety belt mounting bracket 6 can also be designed as a straight plate type without a bending structure, and the side end portion of the safety belt mounting bracket 6 is fixedly connected to the rear side wall panel 4 of the vehicle body. In this embodiment, the safety belt mounting bracket 6 is designed as an inverted "Z" shape, and both the first mounting portion 61 and the second mounting portion 62 are fixedly connected to the rear side wall panel 4 of the vehicle body, thereby increasing the fixing points of the safety belt mounting bracket 6 and the rear side wall panel 4 of the vehicle body and enhancing the stability of the safety belt mounting bracket 6.

[0071] Further, please refer to Figure 11 , the first mounting portion 61 is designed with a flange near one end of the C-ring connecting reinforcement plate and is fixedly connected to the C-ring connecting reinforcement plate by welding. The side end portion of the first mounting portion 61 is designed with a flange and is fixedly connected to the rear side wall panel 4 of the vehicle body by welding. In addition, one end of the second mounting portion 62 is fixedly connected to the flange structure of the lock buckle mounting bracket 8 by welding. The side end of the second mounting portion 62 is designed with a flange and is fixedly connected to the rear side wall panel 4 of the vehicle body by welding. The flange structure can facilitate welding, thereby improving the stability of the connection.

[0072] In addition, please refer to Figure 13 , in some embodiments, the bottom of the lock buckle mounting bracket 8 is designed with a flange, and the flange structure is fixedly connected to the rear wheel cover assembly 5. The side portion of the lock buckle mounting bracket 8 is designed with a flange, and the flange structure is fixedly connected to the rear side wall panel 4 of the vehicle body. The bottom of the lock buckle mounting bracket 8 is fixedly connected to the rear wheel cover assembly 5 by welding, and the side portion of the lock buckle mounting bracket 8 is fixedly connected to the rear side wall panel 4 of the vehicle body by welding. The flange structure can facilitate welding, thereby improving the stability of the connection.

[0073] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural changes made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A rear structure of a vehicle body, characterized in that, The rear structure of the vehicle body is arranged in a ring shape, and the rear structure of the vehicle body includes: A top crossbeam is used to connect to the top of the carriage to support the top of the carriage; Two side panel reinforcement assemblies are used for fixed installation on the rear side panel of the vehicle body. Each side panel reinforcement assembly includes a first connecting portion and a second connecting portion. The first connecting portion of one side panel reinforcement assembly is fixedly connected to one end of the top crossbeam, and the first connecting portion of the other side panel reinforcement assembly is fixedly connected to the other end of the top crossbeam. A bottom crossbeam is used to connect to the bottom of the carriage. One end of the bottom crossbeam is fixedly connected to the second connecting part of one of the side wall reinforcement components, and the other end of the bottom crossbeam is fixedly connected to the second connecting part of another side wall reinforcement component. Each of the aforementioned sidewall reinforcement components includes: A C-ring connecting plate and a C-ring connecting reinforcing plate, one end of the C-ring connecting plate being fixedly connected to the top crossbeam; and... The C-ring assembly has a C-ring connecting plate on one side and the bottom crossbeam on the other end. The C-ring assembly is located within the angle between the rear wheel arch assembly and the bottom of the vehicle body. The first connecting part includes the C-ring connecting plate and the C-ring connecting reinforcing plate; The second connecting part includes the C-ring assembly; The C-ring connecting reinforcement plate and the side edge of the C-ring connecting plate near the front of the vehicle are fixedly connected. The other side of the C-ring connecting plate, that is, the side edge near the rear of the vehicle, is fixedly connected to the rear side panel of the vehicle body. In addition, the C-ring connecting reinforcement plate is approximately trapezoidal in shape. Its top edge is fixedly connected to the top crossbeam, one side is fixedly connected to the C-ring connecting plate, the other side is fixedly connected to the rear side panel of the vehicle body, and its bottom edge is connected to the rear wheel arch assembly. This eliminates the rear partition plate structure of the vehicle body, which can reduce the weight of the vehicle body.

2. The rear structure of the vehicle body as described in claim 1, characterized in that, The C-ring connecting plate and the C-ring connecting reinforcing plate are connected by welding; and / or, The C-ring connecting reinforcement plate, the rear side panel of the vehicle body, and the rear wheel arch assembly are connected by welding and bolting.

3. The rear structure of the vehicle body as described in claim 1, characterized in that, The C-ring assembly and the C-ring connecting plate are connected by welding and bolting; and / or, The C-ring assembly and the bottom crossbeam are connected by welding.

4. A rear body assembly, characterized in that, include: The rear structure of the vehicle body includes the rear structure of the vehicle body as described in any one of claims 1 to 3; The rear side panel of the vehicle body is fixedly connected to the rear structure of the vehicle body; The rear wheel arch assembly is fixedly connected to the rear structure of the vehicle body, and the rear wheel arch assembly is located below the rear side panel of the vehicle body; Seatbelt mounting brackets are installed on the rear structure of the vehicle body; A seatbelt retractor, used for retracting and extending the seatbelt, is mounted to one end of the seatbelt mounting bracket; and... A buckle mounting bracket is used to install rear seat buckles. It is located on the other end of the seat belt mounting bracket and is fixedly connected to the seat belt mounting bracket.

5. The rear vehicle assembly as described in claim 4, characterized in that, Each of the aforementioned side reinforcement components includes a C-ring connecting reinforcement plate; The seat belt mounting bracket is mounted on the C-ring connecting reinforcement plate. One end of the seat belt mounting bracket is fixedly connected to the C-ring connecting reinforcement plate, and one side end of the seat belt mounting bracket is fixedly connected to the rear side panel of the vehicle body.

6. The rear vehicle assembly as described in claim 5, characterized in that, The seat belt mounting bracket includes: The first mounting part is used to install the seat belt retractor. One end of the first mounting part is fixedly connected to the C-ring connecting reinforcement plate, and the side end of the first mounting part is fixedly connected to the rear side panel of the vehicle body. The second mounting part has one end for fixedly connecting to the latch mounting bracket, and its side end is fixedly connected to the rear side panel of the vehicle body; and... The bent connecting part, used to connect the first mounting part and the second mounting part, is configured in a bent shape.

7. The rear vehicle assembly as described in claim 6, characterized in that, One end of the first mounting part is fixedly connected to the C-ring connecting reinforcement plate by welding; the side end of the first mounting part is fixedly connected to the rear side panel of the vehicle body by welding; and / or, One end of the second mounting part is fixedly connected to the latch mounting bracket by welding, and the side end of the second mounting part is fixedly connected to the rear side panel of the vehicle body by welding.

8. The rear vehicle assembly as described in claim 4, characterized in that, The bottom of the latch mounting bracket is fixedly connected to the rear wheel arch assembly; and / or, The side of the latch mounting bracket is fixedly connected to the rear side panel of the vehicle body.

9. The rear body assembly as described in claim 8, characterized in that, The bottom of the latch mounting bracket and the rear wheel arch assembly are fixedly connected by welding; and / or, The side of the latch mounting bracket and the rear side panel of the vehicle body are fixedly connected by welding.

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