Rear vehicle body reinforcing structure

A structure for reinforcing a rear vehicle body may include a roof side rail extending in the longitudinal direction of a vehicle and forming the roof of the vehicle which is overlapped and coupled to a quarter panel extending rearward in the longitudinal direction of the vehicle and coupled to the upper portions of a rear pillar, a rear wheel housing, and a rear combination, and the rear end of the roof side rail in the longitudinal direction of the vehicle is extended and coupled to the rear end of the quarter panel in the longitudinal direction of the vehicle.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to Korean Patent Application No. 10-2013-0157537 filed Dec. 17, 2013, the entire contents of which is incorporated herein for all purposes by this reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a structure for reinforcing a rear vehicle body. More particularly, the present invention relates to a structure for reinforcing a rear vehicle body which may have improved collision performance, distortion strength, riding comfort, and steering stability by using a multi-ring structure.

2. Description of Related Art

In general, the rear vehicle bodies of vehicles may include a real floor panel that forms the bottoms of the passenger room and the trunk room by elongating in the longitudinal direction of the vehicles, and a rear pillar, a rear wheel housing, and a rear combination are sequentially arranged to the rear in the longitudinal direction the vehicles, at both sides of the rear floor panel in the width direction of the vehicles.

A back panel cross member and a transverse member that are elongated in the width direction of the vehicles are arranged above a spare tire rear well at the rear in the longitudinal direction of the vehicles to increase the width-directional strength of the vehicles.

Further, a quarter panel is disposed above the rear pillar and the rear wheel housing and a roof side rail forming the roof of the vehicles is disposed ahead of the quarter panel in the longitudinal direction of the vehicles.

However, in the structures of the rear vehicle bodies, the roof side rail and the quarter upper panel are not connected and the rear combination and the quarter upper panel are also not connected, that is, several parts of the rear vehicle bodies are not firmly connected, such that the connection strength and distortion strength of the rear vehicle bodies are low, the riding comfort and steering stability are decreased, and it is difficult to effectively cope with a rear collision.

BRIEF SUMMARY

Various aspects of the present invention are directed to providing a structure for reinforcing a rear vehicle body having advantageous of being configured to keep passengers more safe by effectively distributing and absorbing shock energy in a rear collision, improve riding comfort and steering stability of a vehicle by increasing the connection strength and distortion strength of the rear vehicle body, and improve driving stability of the vehicle body by increasing the vehicle body input point strength of the rear suspension in a wheel housing, by using a multi-ring structure so that several parts of the rear vehicle body are integrally connected.

In an aspect of the present invention, a structure for reinforcing a rear vehicle body may include a roof side rail extending in the longitudinal direction of a vehicle and forming a roof of the vehicle which may be overlapped and coupled to a quarter panel extending rearward in the longitudinal direction of the vehicle and coupled to the upper portions of a rear pillar, a rear wheel housing, and a rear combination, wherein a rear end of the roof side rail in the longitudinal direction of the vehicle is extended and coupled to a rear end of the quarter panel in the longitudinal direction of the vehicle.

The structure for reinforcing a rear vehicle body may further include a first connecting portion where the rear end of the roof side rail and the rear end of the quarter panel are coupled, where at the first connecting portion, an upper end of a rear wheel housing reinforcing member may be coupled by a first connection bracket and a lower end of the rear wheel housing reinforcing bracket in a height direction of the vehicle may be coupled to the rear wheel housing to reinforce the rear wheel housing.

The lower end of a rear reinforcing member in the height direction of the vehicle may be coupled to the rear end in the longitudinal direction of the rear side member extending in the longitudinal direction of the vehicle, and the upper end of the rear reinforcing member in the height direction of the vehicle may be coupled to the first connection bracket.

The structure for reinforcing a rear vehicle body may further include a second connection portion where lower end of the rear reinforcing member may be coupled to the rear end of the rear side member by a second connection bracket, and one end of a back panel cross member extending in the width direction of the vehicle may be coupled to the second connection bracket, such that the second connecting portion may be formed.

The lower end of the rear reinforcing member in the height direction of the vehicle may be coupled to a transverse member extending in the width direction of the vehicle.

The first connecting portion may be coupled to the rear combination.

The rear side members may be coupled to the left and right sides in the width direction of the vehicle of a rear floor panel that extends in the longitudinal direction of the vehicle and forms the floor of the interior and the trunk room of the vehicle, spare tire wells that form a space for a spare tire may be formed at the rear floor panel, the rear pillar may vertically extend in the height direction of the vehicle and is coupled to the rear side member, the rear wheel housing may be coupled to the rear pillar, and the rear combination may be coupled to the rear wheel housing.

A first ring structure may be formed by connecting the rear pillar and the roof side rail, a second ring structure may be formed by connecting an upper portion of the quarter panel and the roof side rail, a third ring structure connecting the rear wheel housing, the wheel housing reinforcing member, and the quarter panel may be formed, a fourth ring structure connecting the rear side member with the rear reinforcing member and the rear combination with the wheel housing reinforcing member may be formed, a fifth ring structure connecting the spare tire wells may be formed, a sixth ring structure connecting the back panel cross member, the rear reinforcing member, and the transverse member may be formed, and a seventh ring structure connecting the transverse member, the rear reinforcing member, and a rear upper vehicle body may be formed.

According to the structure for reinforcing a rear vehicle body of an aspect of the present invention, the rear end of the rear roof side rail in the longitudinal direction of a vehicle extends to the rear end of the quarter inner upper member in the longitudinal direction of the vehicle, the rear end of the rear roof side rail, the rear end of the quarter inner upper member, and the front end of the rear combination are integrally connected, the rear end of the quarter inner upper member and the front end of the rear combination are integrally connected, and the lower end of the rear reinforcing member is integrally connected with the rear side member, the back panel cross member, and the transverse member, such that a multi-ring structure is formed. Accordingly, the up-down and left-right connection strength and distortion strength of the rear vehicle body are effectively increased.

Accordingly, shock energy applied to the rear vehicle body in a rear collision of a vehicle is effectively distributed and absorbed by the parts of the rear vehicle body, such that it is possible to keep passengers more safe and stabilize the vehicle body of the vehicle in motion. Accordingly, it is possible to improve steering stability and driving stability.

Further, the input point strength of a rear suspension system in a wheel housing is increased, such that the rear suspension system stably supports the vehicle body and the riding comfort can be improved.

The methods and apparatuses of the present invention may have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention.

Reference numerals set forth in the Drawings may include reference to the following elements as further discussed below

DETAILED DESCRIPTION

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the Field of the Invention to which the present invention pertains may carry out the exemplary embodiments.

Referring toFIG. 1, a rear vehicle body structure may include a rear floor panel10that extends in the longitudinal direction of a vehicle and forms the bottom of a rear floor and a trunk room.

Rear side members20extending in the longitudinal direction of the vehicle are attached to both sides of the rear floor panel10in the width direction of the vehicle.

A rear pillar30, a rear wheel housing40, and a rear combination50are attached to the rear side member20sequentially at the rear of the vehicle.

A quarter panel60extending in the longitudinal direction of the vehicle is attached to the upper portions of the rear pillar30, the rear wheel housing40, and the rear combination50.

A roof side rail70that forms the roof of the vehicle extends in the longitudinal direction of the vehicle and a rear end of the roof side rail70extends to almost fit the rear end of the quarter panel60in the longitudinal direction of the vehicle and is coupled thereto.

That is, the roof side rail70extends rearward in the longitudinal direction of the vehicle together with the quarter panel60without disconnecting from the quarter panel60.

Further, one end of a wheel housing reinforcing member80is connected to a side of the wheel housing40and the other end is integrally coupled to a first connecting portion A to which the rear end of the roof side rail70and the rear end of the quarter panel60are connected, in order to reinforce the support strength of the rear wheel housing40. The first connecting portion is coupled to the rear combination.

A back panel cross member90extending in the width direction of the vehicle is integrally connected to the rear end of the rear side member20in the longitudinal direction of the vehicle and a transverse member110extending in the width direction of the vehicle is coupled to a spare tire rear well100.

A lower end of a rear reinforcing member120, which is added in accordance with an aspect of the present invention, is integrally coupled to a second connecting portion B to which the rear end of the rear side member20and one end of the back panel cross member90are connected, and the upper end of the rear reinforcing member120extends outside in the width direction of the vehicle and in the height direction of the vehicle and is integrally coupled to the first connecting portion A.

Therefore, according to the structure for reinforcing a rear vehicle body of an aspect of the present invention, a multi-ring structure having a closed-loop structure is formed, such that the connection strength and distortion strength of the rear vehicle body are effectively increased.

That is, a first ring structure R1may be formed by connecting the rear pillar30and the roof side rail70, a second ring structure R2may be formed by connecting the upper portion of the quarter panel60and the roof side rail70, and a third ring structure R3connecting the wheel housing40, the wheel housing reinforcing member80, and the quarter panel60may be formed.

Further, a fourth ring structure R4connecting the rear side member20with the rear reinforcing member120and the rear combination50with the wheel housing reinforcing member80may be formed, a fifth ring structure R5connecting the spare tire front well, rear well, and left and right wells may be formed, a sixth ring structure R6connecting the back panel cross member90, the rear reinforcing member120, and the transverse member110may be formed, and a seventh ring structure R7connecting the transverse member110, the rear reinforcing member120, and the rear upper vehicle body may be formed.

Further, as shown in the figures, the adjacent ring structures are connected.

As described above, when the multi-ring structure without disconnection is used, the connection strength and distortion strength of the rear vehicle body are effectively increased, shock energy transmitted to the ring structures is distributed and absorbed by them, and the shock energy that is not absorbed by the ring structures is distributed and absorbed by other ring structures, such that the performance of distributing and absorbing shock energy is effectively improved.

Referring toFIG. 2, at the first connecting portion A, the rear end of the roof side rail70is extended and coupled to the rear end of the quarter panel60outside the vehicle in the width direction, and at the joint, the upper end of the wheel housing reinforcing member80and the upper end of the rear reinforcing member120are coupled by attaching a first connection bracket130.

Accordingly, the roof side rail70, quarter panel60, rear combination50, rear reinforcing member120, and wheel housing reinforcing member80are integrally connected by the first connection bracket130.

Referring toFIG. 3, at the second connecting portion B, a second connection bracket140is coupled to the rear end of the rear side member20, one end of the back panel cross member90and the lower end of the rear reinforcing member120are coupled by the second connection bracket140, and the lower end of the rear reinforcing member120overlaps the transverse member110.

Accordingly, the rear side member20, back panel cross member90, rear reinforcing member120, and transverse member110can be connected by the second connection bracket140.

The members may be coupled by welding or bolting.