KR20220059625A - Rear vehicle body structure - Google Patents

Abstract

A rear vehicle body structure is disclosed. According to one exemplary embodiment of the disclosed invention, the rear vehicle body structure comprises: an underbody; and an upper body coupled to the underbody. The rear vehicle body structure is coupled to an upper surface of a rear floor panel provided to a rear side of the upper body while having a set gap from the underbody and respectively connected to a back panel of the upper body and both side rear quarter units.

Description

Rear body structure {REAR VEHICLE BODY STRUCTURE}

An embodiment of the present invention relates to a body structure, and more particularly, to a rear body structure of a PBV (Purpose Built Vehicle) vehicle.

Recently, the automobile industry is introducing a new concept of future mobility vision for realizing a human-centered and dynamic future city. One of these future mobility solutions is a PBV (Purpose Built Vehicle) vehicle as a purpose-based mobility.

PBV vehicles are eco-friendly mobility solutions that provide customized services for passengers during the time they travel from the ground to their destination.

The body of a PBV vehicle is composed of an underbody (also referred to as a rolling chassis or skateboard in the art) and an upper body mounted on the underbody.

Here, in the lower rear of the upper body, the rear follower panel is coupled to the under body with a set gap, in order to prevent collision between parts between the rear follower panel and the under body. Furthermore, in the related art, a reinforcing member for reinforcing the rigidity and collision of the rear side of the vehicle body is mounted on the under body from the lower side of the rear floor panel.

However, since the gap between the rear follower panel and the under body is narrow in the related art, skeletal rigidity and collision performance at the rear side of the vehicle body may be deteriorated due to the limitation of the cross-sectional size of the reinforcing member.

In addition, in the prior art, as the reinforcing member is configured on the lower side of the rear follower panel, the aerodynamic performance may be deteriorated by obstructing the flow of air through the gap between the rear follower panel and the under body.

Matters described in this background section are prepared to enhance understanding of the background of the invention, and may include matters that are not already known to those of ordinary skill in the art to which this technology belongs.

SUMMARY Embodiments of the present invention provide a rear body structure capable of increasing the skeletal rigidity of the rear side of the vehicle body and increasing the aerodynamic performance and rear collision performance of the vehicle body.

A rear body structure according to an embodiment of the present invention is a rear body structure of a vehicle including an under body and an upper body coupled to the under body, and is provided on the rear side of the upper body with a set gap with the under body. It may include a reinforcing member coupled to the upper surface of the rear follower panel and connected to the back panel of the upper body and the rear quarter portions on both sides, respectively.

In addition, in the rear body structure according to an embodiment of the present invention, the reinforcing member is disposed along a longitudinal direction of the vehicle body, a first member connected to the center of the back panel through a rear end, and a front end of the first member It is coupled to and may include a second member connected to the both rear quarter parts, respectively.

Also, in the rear body structure according to an embodiment of the present invention, the second member may be connected to the first member and the both rear quarter parts in an oblique direction.

Also, in the rear body structure according to an embodiment of the present invention, the reinforcing member may be provided in a Y-shape by combining the first and second members.

Also, in the rear body structure according to an embodiment of the present invention, the second member may be respectively connected to the both rear quarter parts through a member rain.

In addition, in the rear body structure according to an embodiment of the present invention, the member rain is connected to the second member through one end, and is connected to the second member through the other end with a quarter rain connected in the vertical direction to the both rear quarters. can

In addition, in the rear body structure according to an embodiment of the present invention, the rear follower panel may be coupled to upper surfaces of both rear side members of the upper body.

In addition, in the rear body structure according to an embodiment of the present invention, the underbody may be coupled to lower surfaces of the both rear side members through both rear chassis frames.

In addition, in the rear body structure according to an embodiment of the present invention, bracket-type body mounting parts may be coupled to the both rear side members under the rear follower panel.

In addition, in the rear body structure according to an embodiment of the present invention, the body mounting part may include fastening parts for fastening the both rear side members and the both rear chassis frames.

In addition, in the rear body structure according to an embodiment of the present invention, the second member is respectively connected to the both rear quarter parts through a member rain, and the coupling part is coupled to the body mounting part to the member rain. A through hole may be formed for this.

In addition, in the rear body structure according to an embodiment of the present invention, the fastening part includes a mounting bolt coupled through the body mounting part, the both sides of the rear side member, and the both sides of the rear chassis frame through the through hole; It may include a mounting nut coupled to the lower surface of the rear chassis frame on both sides and fastened to the mounting bolt.

In addition, in the rear body structure according to an embodiment of the present invention, the reinforcing member includes a first member connected to the center of the back panel, and a first member connected to the first member and the both rear quarters in an oblique direction, respectively. The two members, the body mounting part, and the fastening part may be connected to the both rear side members through the rear floor panel in an M-shape.

In addition, in the rear body structure according to an embodiment of the present invention, the rear follower panel may be coupled to an intermediate cross member connected to the both rear side members in a vehicle width direction.

Also, in the rear body structure according to an embodiment of the present invention, the under body may be provided as a skateboard type.

Embodiments of the present invention may increase the rear-side skeletal rigidity of the under body and the upper body while securing the aerodynamic performance of the vehicle body, and may improve the rear collision performance of the vehicle.

In addition, the effects obtainable or predicted by the embodiments of the present invention are to be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects predicted according to an embodiment of the present invention will be disclosed in the detailed description to be described later.

Since these drawings are for reference in describing an exemplary embodiment of the present invention, the technical spirit of the present invention should not be construed as being limited to the accompanying drawings.
1A and 1B are diagrams illustrating an example of a vehicle applied to a rear body structure according to an embodiment of the present invention.
2 is a combined perspective view illustrating a rear body structure according to an embodiment of the present invention.
3 is a plan view illustrating a rear body structure according to an embodiment of the present invention.
4 is a cross-sectional configuration diagram illustrating a rear body structure according to an embodiment of the present invention.
5 and 6 are views illustrating a coupling portion of a reinforcing member applied to a rear body structure according to an embodiment of the present invention.
7 to 9 are views illustrating a body mounting and fastening portion of a rear body structure according to an embodiment of the present invention.
10 is a view illustrating a connection structure between a reinforcing member and a body mounting portion applied to a rear body structure according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. However, the present invention may be implemented in several different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

Since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the bar shown in the drawings, and the thickness is enlarged to clearly express various parts and regions.

In addition, in the following detailed description, the reason for dividing the names of components into first, second, etc. is to distinguish them in the same relationship, and the order is not necessarily limited in the following description.

Throughout the specification, when a part includes a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

In addition, terms such as ... part, ... means described in the specification mean a unit of a comprehensive configuration that performs at least one function or operation.

1A and 1B are diagrams illustrating an example of a vehicle applied to a rear body structure according to an embodiment of the present invention.

1A and 1B , the rear body structure 100 according to the embodiment of the present invention may be applied to, for example, a Purpose Built Vehicle (PBV) vehicle.

Here, the PBV vehicle is an electric vehicle-based eco-friendly mobile vehicle that provides customized services required for passengers during the time they travel from the ground to their destination, and enables optimal route setting and group driving for each situation, and furthermore, a large indoor space. It may be a box-shaped design vehicle with

Such a PBV vehicle includes a skateboard-type underbody 10 (also referred to as a rolling chassis in the art) and an upper body 20 mounted on the underbody 10 .

The battery assembly 1 may be mounted on the under body 10 . The front chassis frame 11 is formed on both sides of the front part, the rear chassis frame 13 is formed on both sides of the rear part, and the front part and the rear part are formed. The center chassis frame 15 is formed on both sides of the center part between parts.

In addition, a plurality of under cross members 17 for mounting the battery assembly 1 are mounted on the under body 10 through the front, rear and center chassis frames 11 , 13 , and 15 .

Here, the under cross members 17 are connected to the inner sides of the front, rear, and center chassis frames 11, 13, and 15 on both sides along the vehicle width direction through both ends. Then, the battery assembly 1 is coupled to the under cross members 17 through the battery mounting bracket 3 .

On the other hand, the upper body 20 is a body coupled to the under body 10, and constitutes a cabin in the center part between the front part and the rear part, for example, a space frame formed by connecting a steel plate or a pipe to form a skeleton. can be

In the upper body 20, front side members 21 are formed on both sides of the front part, rear side members 23 are formed on both sides of the rear part, and side seals 25 are formed on both sides of the center part between the front part and the rear part. ) is formed.

The front side member 21 is coupled to the front chassis frame 11 of the under body 10 , and the rear side member 23 is coupled to the rear chassis frame 13 of the under body 10 , and a side sill ( 25 is coupled to the center chassis frame 15 of the under body 10 .

Further, in the upper body 20 , a front follower panel 22 is coupled to the front side member 21 , a rear follower panel 24 is coupled to the rear side member 23 , and a center is provided on the side sill 25 . The follower panel 26 is coupled.

Here, the rear follower panel 24 is coupled to the rear side member 23 with a gap set between its lower surface and the rear chassis frame 13 of the under body 10 . The above-described gap is formed to prevent collision between components between the rear follower panel 24 and the rear chassis frame 13 of the under body 10 .

Further, in the upper body 20, front quarter parts 27 connected to the front side member 21 are provided on both sides of the front part, and rear quarter parts connected to the rear side member 23 are provided on both sides of the rear part ( 29) is provided.

In the industry, the vehicle width direction is referred to as the L direction, the vehicle body length direction (front and rear direction) is referred to as the T direction, and the height direction of the vehicle body is referred to as the H direction. However, in the embodiment of the present invention, instead of setting the LTH direction as described above as the reference direction, the vehicle width direction, the vehicle body length direction, and the vertical direction will be set to describe the following components.

In addition, an end (one/one end or the other/one end) in the following may be defined as either end, and is defined as a certain part (one/one end or the other/one end) including the end. it might be

The rear body structure 100 according to the embodiment of the present invention has a structure capable of increasing the skeletal rigidity of the rear side of the vehicle body and increasing the aerodynamic performance and rear collision performance of the vehicle body.

2 is a combined perspective view showing a rear body structure according to an embodiment of the present invention, FIG. 3 is a plan configuration view showing a rear body structure according to an embodiment of the present invention, and FIG. 4 is an embodiment of the present invention It is a cross-sectional configuration diagram showing the structure of the rear body according to the

1A, 1B to 4 , the rear body structure 100 according to an embodiment of the present invention basically includes a reinforcing member 30 , a body mounting part 50 , and a fastening part 70 . It is configured as follows, and the description for each configuration is as follows.

In an embodiment of the present invention, the reinforcing member 30 is provided as a reinforcing unit for reinforcing the rear-side skeletal rigidity and rear collision of the vehicle body. The reinforcing member 30 is provided on the upper surface of the rear follower panel 24 so as not to obstruct the flow of air flowing into the gap between the lower surface of the rear follower panel 24 and the rear chassis frame 13 of the under body 10 . is coupled to

The reinforcing member 30 is connected to the center of the back panel 28 forming the tailgate opening on the rear side of the upper body 20 on the upper surface of the rear follower panel 24, and the upper body 20 ) are respectively connected to the rear quarter portions 29 of both sides. The reinforcing member 30 includes a first member 31 and a second member 32 .

The first member 31 is disposed along the longitudinal direction of the vehicle body from the upper surface of the rear follower panel 24, is joined to the upper surface of the rear follower panel 24 by welding through a joining flange, and is connected to the back panel ( 28) is connected to the center. The rear end of the first member 31 is welded to the center of the back panel 28 through a joint flange, as shown in FIG. 5 .

In addition, the second member 32 is provided as a pair on the upper surface of the rear follower panel 24, is connected to the front end of the first member 31 through one end, and both rear quarter parts 29 through the other end. is practically connected to The second member 32 is welded to the upper surface of the rear follower panel 24 through the joining flange, and joined to the front end of the first member 31 by welding.

Here, the second members 32 are respectively connected to the front end and both sides of the rear quarter portions 29 of the first member 31 in an oblique direction, and accordingly, the reinforcing member 30 according to the embodiment of the present invention. is provided in a Y-shape by the coupling of the first and second members 31 and 32 .

Furthermore, as shown in FIG. 6 , the second members 32 are respectively connected to both rear quarters 28 through the member rains 33 . The member rescue 33 is welded to the upper surface of the rear follower panel 24 through a joint flange.

This member retain 33 is connected to the second member 32 through one end, and is connected to both rear quarter portions 28 through the other end. One end of the member retainer 33 is welded to the other end of the second member 32 through a joint flange, and the other end of the member retainer 33 is a quarter connected in the vertical direction to both rear quarters 28 . It is joined to the rain 28a by welding through a joining flange.

Meanwhile, referring to the drawings disclosed above and FIGS. 7 to 9 , in an embodiment of the present invention, the rear follower panel 24 is coupled to the upper surface of the rear side member 23 of the upper body 20 , the under body Reference numeral 10 is coupled to lower surfaces of both rear side members 23 through the rear chassis frame 13 .

Furthermore, the rear follower panel 24 as described above is coupled to the intermediate cross members 23a connected to both rear side members 23 in the vehicle width direction.

In the above, the intermediate cross member 23a is for connecting the rear follower panel 24 and the above-mentioned center follower panel 26 . The intermediate cross member 23a is welded through both ends to the inner sides of the rear side members 23 on both sides, and is welded to the lower surfaces of the rear follower panel 24 and the center follower panel 26 .

In an embodiment of the present invention, the body mounting part 50 and the fastening part 70 are both rear chassis frames 13 of the under body 10 and the rear side members ( 23) to combine.

In the above, the body mounting unit 50 includes a mounting bracket 51 . The mounting bracket 51 is coupled to both rear side members 23 at the lower side of the rear follower panel 24 .

In addition, the fastening part 70 is for substantially fastening the both rear chassis frames 13 of the under body 10 and the both rear side members 23 of the upper body 20 through the body mounting part 50 . will be.

The fastening part 70 is provided in the body mounting part 50 , the member reinforcement 33 of the reinforcing member 30 , the body mounting part 50 , the both rear side members 23 , and both rear chassis. The frame 13 may be integrally fastened. Here, a through hole 35 for coupling the fastening part 70 to the body mounting part 50 is formed in the member rescue 33 .

The fastening part 70 includes a mounting bolt 71 and a mounting nut 73 . The mounting bolts 71 are coupled through the mounting bracket 51 , the both rear side members 23 , and the both rear chassis frames 13 through the through-holes 35 of the member rains 33 .

In addition, the mounting nut 73 is a weld nut, which is coupled to the lower surfaces of the rear chassis frame 13 on both sides by welding and is fastened to the mounting bolt 71 .

On the other hand, as described above, the member rain 33, the body mounting part 50, the both sides of the rear side member 23, and the both sides of the rear chassis frame 13 are integrally fastened through the fastening part 70 as described above. , as shown in FIG. 10, connecting the first member 31 of the reinforcing member 30 to the center of the back panel 28, and connecting the second member 32 to the first member 31 and both rear quarters As it is connected to the part 28 in an oblique direction, the reinforcing member 30 according to the embodiment of the present invention is connected to both rear side members 23 through the rear follower panel 24 in an M-shape.

Hereinafter, the effects of the rear body structure 100 according to the embodiment of the present invention configured as described above will be described in detail with reference to the previously disclosed drawings.

First, in the embodiment of the present invention, the rear floor panel 24 of the upper body 20 is disposed with a set gap with the rear chassis frame 13 of the under body 10, and the upper surface of the rear floor panel 24 A reinforcing member 30 is attached to the

Accordingly, in the embodiment of the present invention, collision between components between the rear follower panel 24 and the rear chassis frame 13 of the under body 10 can be prevented. In addition, in the embodiment of the present invention, as the reinforcing member 30 is mounted on the upper surface of the rear floor panel 24 , the flow of air introduced into the gap between the rear floor panel 24 and the rear chassis frame 13 . Since it does not interfere with the vehicle body, it is possible to improve the aerodynamic performance of the vehicle body.

In addition, in the embodiment of the present invention, the reinforcing member 30 connects the first member 31 to the center of the back panel 28 of the upper body 20, and connects the second member 32 to the first member ( 31) and the rear quarter portions 29 on both sides of the upper body 20 in an oblique direction.

Accordingly, in the embodiment of the present invention, the torsion of the rear portion of the vehicle body caused by the load input through the both rear quarter portions 29 is absorbed through the Y-shaped reinforcing member 30, while increasing the skeletal rigidity of the rear portion. It is possible to increase the rigidity of the tailgate opening.

Further, in the embodiment of the present invention, the member reinforcement 33 of the reinforcing member 30 through the fastening part 70, the body mounting part 50, the both rear side members 23, and the both rear chassis frame ( 13) is integrally fastened, and the reinforcing member 30 is connected to both rear side members 23 through the rear follower panel 24 in an M-shape.

And, in the embodiment of the present invention, the member reinforcement 33 of the reinforcing member 30 has a structure in which the quarter reinforcement 28a connected in the vertical direction to the rear quarter parts 28 on both sides is coupled.

Accordingly, in the embodiment of the present invention, the rigidity of the rear part of the skeleton and the rigidity of the tailgate opening is further increased, and the vertical connection of the reinforcing member 30 through the quarter rescue 28a is strengthened, and the reinforcing member 30 ) can increase the stiffness of the input point according to the lateral connection.

In addition, in the embodiment of the present invention, the center portion of the back panel 28 is supported through the reinforcing member 30 and a path for transmitting the load to the intermediate cross member 23a is formed, thereby improving the rear collision performance of the vehicle body. can do it

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and it is possible to carry out various modifications within the scope of the claims, the detailed description of the invention, and the accompanying drawings, and this also It goes without saying that it falls within the scope of the invention.

1: Battery assembly 3: Battery mounting bracket
10: Underbody 11: Front chassis frame
13: rear chassis frame 15: center chassis frame
17: under cross member 20: upper body
21: front side member 22: front floor panel
23: rear side member 23a: intermediate cross member
24: rear floor panel 25: side sill
26: center follower panel 27: front quarter part
28: back panel 28a: quarter reinforcement
29: rear quarter part 30: reinforcement member
31: first member 32: second member
33: member reinforcement 35: through hole
50: body mounting unit 51: mounting bracket
70: fastening part 71: mounting bolt
73: mounting nut 100: rear body structure.

Claims (13)

A rear body structure of a vehicle comprising an under body and an upper body coupled to the under body,
a reinforcing member coupled to an upper surface of a rear follower panel provided on a rear side of the upper body with a set gap with the under body, and respectively connected to the back panel and both rear quarters of the upper body;
A rear body structure comprising a. According to claim 1,
The reinforcing member is
a first member disposed along the longitudinal direction of the vehicle body and connected to the center of the back panel through a rear end;
A second member coupled to the front end of the first member and connected to the both rear quarter portions, respectively
A rear body structure comprising a. 3. The method of claim 2,
The second member is
A rear body structure connected to the first member and the both rear quarters in an oblique direction. 4. The method of claim 3,
The reinforcing member is
A rear body structure provided in a Y-shape by the coupling of the first and second members. 3. The method of claim 2,
The second member is
A rear body structure that is respectively connected to the rear quarters on both sides through a member rain. 6. The method of claim 5,
The member Reinf,
A rear body structure connected to the second member through one end, and connected through the other end and a quarter rain connected in the vertical direction to the both rear quarters. 3. The method of claim 2,
The rear follower panel is coupled to upper surfaces of both rear side members of the upper body,
The underbody is a rear body structure coupled to lower surfaces of the both rear side members through both rear chassis frames. 8. The method of claim 7,
A bracket-type body mounting part is coupled to the both rear side members on the lower side of the rear follower panel,
The rear body structure of the body mounting part is provided with fastening parts for fastening the both rear side members and the both sides of the rear chassis frame. 9. The method of claim 8,
The second member is respectively connected to the both rear quarters through a member rain,
A rear body structure in which a through hole for coupling the fastening part to the body mounting part is formed in the member rain. 10. The method of claim 9,
The fastening part,
a mounting bolt coupled through the body mounting part, the both rear side members, and the both sides of the rear chassis frame through the through hole;
A mounting nut coupled to the lower surface of the rear chassis frame on both sides and fastened to the mounting bolt
A rear body structure comprising a. 8. The method of claim 7,
The reinforcing member is
A first member connected to the center of the back panel, a second member connected to the first member and the both rear quarters in an oblique direction, respectively, through the rear follower panel by the body mounting part and the fastening part The rear body structure connected to both rear side members in an M shape. 8. The method of claim 7,
The rear floor panel is
A rear body structure coupled to an intermediate cross member connected to the both rear side members in a vehicle width direction. According to claim 1,
A rear body structure in which the under body is a skateboard type.

Images