JP2000053028A - Automobile rear body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile rear body structure restraining deformation of the lower part of a rear pillar to a minimum when dynamic force is received from the rear and being advantageous with respect to weight and cost. SOLUTION: A vertically long-shaped outer reinforcement 9 is provided on the vehicular external side of a wheel house outer 3 with its lower end connected more to the rear than the top 3a of the wheel house outer 3 and its upper end connected close to a rear window glass opening 8 on the upper part of a rear pillar 7 and a reinforcement plate 10 connected to the upper surface of the wheel house outer 3 is provided in the front of the outer reinforcement 9 through impact absorbing parts S at specific intervals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rear body structure of an automobile.

[0002]

2. Description of the Related Art A conventional rear body structure of an automobile includes:
For example, there is a structure as disclosed in JP-A-5-16837. That is, before and after the wheel house section,
Reinforces each having a long shape in the front-rear direction are provided through a gap as a shock absorbing portion. In particular, the front reinforcement connects the front end to the lower part of the rear pillar so that the rear pillar constituting the rear edge of the door opening formed on the side of the vehicle body receives input from the rear due to a rear collision or the like. Have been. Therefore, when an input from the rear is applied, the rear reinforcement moves forward by an amount corresponding to the shock absorbing part to absorb some shock, and then pushes the front reinforcement to input the lower part of the rear pillar. To communicate.

[0003]

However, in such a prior art, although the input from the rear is absorbed to some extent by the shock absorbing portion, the input is basically transmitted through the front and rear reinforcements to the rear pillar. To the lower part of the rear pillar, the lower part of the rear pillar is deformed, and the repair becomes troublesome. In addition, the front reinforcement must be large in size connected to the lower portion of the rear pillar, which is disadvantageous in terms of weight and cost.

The present invention has been made by paying attention to such a conventional technique, and minimizes the deformation of the lower portion of the rear pillar even when receiving an input from the rear, and is advantageous in terms of weight and cost. A rear body structure of an automobile is provided.

[0005]

According to the first aspect of the present invention,
A rear pillar constituting a rear edge of a door opening formed in a vehicle body side portion, a rear fender extending rearward from the rear pillar, and an arch-shaped wheel house outer located below the rear pillar and the rear fender In the rear body structure of the automobile equipped with, the lower end is connected to the vehicle exterior of the wheel house outer, the rear end is connected to the rear of the wheel house outer from the top, and the upper end is connected to the vicinity of the rear window glass opening above the rear pillar. An outer reinforcement having a vertically long shape is provided, and a reinforcing plate joined to the upper surface of the wheel house outer is provided on the front side of the outer reinforcement via a shock absorbing portion at a predetermined interval. .

According to the first aspect of the present invention, since the outer reinforcement has a vertically long shape, an input from the rear due to a rear collision or the like is made via the outer reinforcement to the upper portion of the rear pillar. It is transmitted near the rear window glass opening and hardly transmitted to the front side. The area near the rear window glass opening at the top of the rear pillar is easily deformed by input from the rear compared to the area near the door opening on the side of the vehicle body, so even if input is guided to this part and deformed, repairability There is no disadvantage in terms of. The input from the rear is weakened by deforming the lower portion of the outer reinforce, and is further weakened by the shock absorbing portion in front of the outer reinforce.
On the other hand, the part where the reinforcing plate is provided has relatively higher rigidity than the shock absorbing part, so it keeps its original shape without significant deformation and minimizes the deformation of the lower rear pillar corresponding to the door opening on the side of the vehicle body Can be minimized. Further, the reinforcing plate only needs to be relatively stiffer than the shock absorbing portion and can be reduced in size, which is advantageous in terms of weight and cost.

[0007] According to the second aspect of the present invention, the entire outer reinforcement is located behind the top of the wheel house outer.

According to the second aspect of the present invention, since the wheel house outer is always bent upward from the top, if the entire outer reinforce is displaced rearward from the top of the wheel house outer, the wheel house outer may be deformed. Bending deformation can be ensured, and sufficient energy can be absorbed by the deformation.

According to the third aspect of the present invention, the shock absorbing portion is located at a position substantially coincident with the top of the wheel house outer.

According to the third aspect of the present invention, since the shock absorbing portion is substantially aligned with the top of the wheel house outer which is originally apt to break, energy absorption due to upward bending deformation from the top of the wheel house outer is more stably and surely performed. It can be carried out.

In the invention according to claim 4, the reinforcing plate extends forward along the wheel house outer, and the front end does not reach the door opening.

According to the fourth aspect of the invention, since the front end of the reinforcing plate does not reach the door opening, deformation of the door opening can be minimized.

According to a fifth aspect of the present invention, an inner reinforcement having a rear end substantially coincident with a rear end of the reinforcing plate is provided inside the wheel house outer.

According to the fifth aspect of the present invention, since the reinforcing plate can be reduced in size, restrictions on welding points are reduced,
By attaching an inner reinforcement to the inside of the wheel house outer in the reinforcing plate portion, the rigidity of the vehicle body can be increased. Also, the rear end of this inner reinforce
By substantially matching the rear end of the reinforcing plate, the difference in strength between the reinforcing member and the shock absorbing portion can be further increased, and the deformation of the vehicle body during a collision can be easily controlled.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a side view showing a rear portion of a motor vehicle.
Indicates a door opening formed on the side of the vehicle body. Behind the door opening 1, a rear fender 2 forming an outer wall of the vehicle body is formed. An arch-shaped wheel house outer 3 is formed at the lower end of the rear fender 2 inside the vehicle.

A portion of the rear fender 2 corresponding to the rear edge of the door opening 1 includes a roof 4 and a side sill 5.
The rear pillar 7 is joined to the rear fender 2 from the inside of the vehicle with the pillar inner 6 and the wheel house outer 3 so as to form a rear pillar 7 having a closed cross-sectional structure in the vertical direction. The front side of the rear pillar 7 corresponds to the door opening 1 on the side of the vehicle body, while the upper rear corresponds to the rear window glass opening 8.

At the outer side of the wheel house outer 3 and the pillar inner 6, the lower end is located at the wheel house outer 3.
An outer reinforce 9 is connected to the rear of the top 3a, and the upper end is connected to a rear window glass opening 8 formed above the rear pillar 7. The outer reinforcement 9 has a hat-shaped cross section and has a vertically long shape and is joined to the rear pillar inner 6 and the wheel house outer 3 to form a closed cross section (see FIG. 4). The upper side of the outer reinforcement 9 is slightly inclined backward, and the whole is located behind the top 3 a of the wheel house outer 3.

On the front side of the outer reinforcement 9,
A reinforcing plate 10 having a substantially L-shaped cross section is provided on the upper surface of the wheel house outer 3 with a predetermined distance between the shock absorbing portions S located at the top 3a of the wheel house outer 3 therebetween. The reinforcing plate 10 extends forward along the wheel house outer 3, but does not reach the door opening 1. The reinforcing plate 10 only needs to be relatively rigid than the shock absorbing portion S, and has a small size that does not reach the door opening 1.

As described above, the reinforcing plate 10 is small in size and has few restrictions on welding points.
The inner reinforce 11 having a hat-shaped cross section can be attached to the inside of the wheel house outer 3 in the vehicle body, thereby increasing the rigidity of the vehicle body. This inner reinforce 11
Has a tapered shape with a narrow upper width in a side view, and a rear end thereof substantially coincides with a rear end of the reinforcing plate 10.

Next, the operation when the input F due to a rear collision or the like is applied to the rear of the vehicle body from the rear, and the advantages of this embodiment will be described.

When an input F from the rear is applied to the rear part of the vehicle body, the input F is applied to the rear window above the rear pillar 7 through the outer reinforcement 9 because the outer reinforcement 9 has a vertically long shape. The light is transmitted to the vicinity of the glass opening 8 and is hardly transmitted to the front side. Therefore,
The vicinity of the rear window glass opening 8 above the rear pillar 7 is easily deformed, but the front side is less likely to be deformed than the outer reinforcement 9. Originally, rear window glass opening 8
The vicinity is closer to the input F from the rear than the vicinity of the door opening 1.
Accordingly, since the portion is originally easily deformed, even if the input F is guided and deformed in this portion, there is no disadvantage in terms of repairability.

The input F from the rear is weakened by deforming the lower portion of the outer reinforcement 9, and is further weakened by the shock absorbing portion S in front of the outer reinforcement 9. On the other hand, the portion where the reinforcing plate 10 is provided has relatively higher rigidity than the shock absorbing portion S, so that the original shape is maintained without causing large deformation, and deformation of the lower portion of the rear pillar 7 corresponding to the door glass opening is minimized. Can be suppressed. Particularly, since the front end of the reinforcing plate 10 does not reach the door opening 1, deformation of the door opening 1 can be minimized.

Then, the wheel house outer 3 is bent upward from the top 3a by the input F, so that energy can be absorbed. In this embodiment, since the entire outer reinforcement 9 is displaced rearward from the top 3a of the wheel house outer 3, the upward bending deformation of the wheel house outer 3 is reliable, and sufficient energy can be absorbed by the deformation. it can.

Further, since the shock absorbing portion S is substantially coincident with the top 3a of the foil house outer 3 which is originally easily broken,
Energy absorption due to upward bending deformation from the top 3a of the wheel house outer 3 can be performed more stably and reliably.

Further, by making the rear end of the inner reinforcement 11 substantially coincide with the rear end of the reinforcing plate 10, the difference in strength between the reinforcing plate 10 and the shock absorbing portion S can be further increased, and the deformation of the vehicle body in the event of a collision can be reduced. Can be easily controlled.

[0027]

According to the first aspect of the present invention, since the outer reinforcement has a vertically long shape,
An input from the rear due to a rear collision or the like is transmitted to the vicinity of the rear window glass opening above the rear pillar via the outer reinforcement, and is hardly transmitted to the front side. Since the part where the reinforcing plate is provided has relatively higher rigidity than the shock absorbing part, the original shape is maintained without significant deformation,
The deformation of the lower portion of the rear pillar corresponding to the door opening on the side of the vehicle body can be minimized. Further, the reinforcing plate only needs to be relatively stiffer than the shock absorbing portion and can be reduced in size, which is advantageous in terms of weight and cost.

According to the second aspect of the invention, since the wheel house outer is always bent upward from the top, if the entire outer reinforce is displaced rearward from the top of the wheel house outer, the wheel house outer may be deformed. Bending deformation can be ensured, and sufficient energy can be absorbed by the deformation.

According to the third aspect of the present invention, since the shock absorbing portion is substantially aligned with the top of the wheel house outer which is originally easily broken, the energy absorption due to the upward bending deformation from the top of the wheel house outer is more stably and surely performed. It can be carried out.

According to the fourth aspect of the invention, since the front end of the reinforcing plate does not reach the door opening, the deformation of the door opening can be minimized.

According to the fifth aspect of the present invention, since the reinforcing plate can be reduced in size, restrictions on welding points are reduced,
By attaching an inner reinforcement to the inside of the wheel house outer in the reinforcing plate portion, the rigidity of the vehicle body can be increased. Also, the rear end of this inner reinforce
By substantially matching the rear end of the reinforcing plate, the difference in strength between the reinforcing member and the shock absorbing portion can be further increased, and the deformation of the vehicle body during a collision can be easily controlled.

[Brief description of the drawings]

FIG. 1 is a side view showing a rear body structure of an automobile according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 3 is a sectional view taken along the line SB-SB shown in FIG. 1;

FIG. 4 is a sectional view taken along the line SC-SC shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 door opening 2 rear fender 3 wheel house outer 3 a top 4 roof 5 side sill 6 pillar inner 7 rear pillar 8 rear window glass opening 9 outer reinforcement 10 reinforcing plate 11 inner reinforcement F rearward input S shock absorbing part

Claims (5)

[Claims] 1. A rear pillar constituting a rear edge of a door opening formed on a side of a vehicle body, a rear fender extending rearward from the rear pillar, and an arch located below the rear pillar and the rear fender. In a rear body structure of a vehicle having a wheel house outer having a shape, a lower end is connected to a vehicle outer side of the wheel house outer, a rear end is connected to a rear side of a top of the wheel house outer, and an upper end is a rear window glass opening above a rear pillar. In addition to providing an outer reinforce having a vertically long shape connected in the vicinity, a reinforcing plate joined to the upper surface of the wheel house outer through a shock absorbing portion at a predetermined interval on the front side of the outer reinforce. A rear body structure of an automobile characterized by being provided. 2. The entire outer reinforce is located rearward of the top of the wheel house outer.
Rear body structure of the vehicle as described. 3. The rear body structure of an automobile according to claim 1, wherein the shock absorbing portion is located at a position substantially coincident with the top of the wheel house outer. 4. The vehicle according to claim 1, wherein the reinforcing plate extends forward along the wheel house outer, and the front end does not reach the door opening.
The rear body structure of an automobile according to any one of claims 3 to 7. 5. The rear body structure of an automobile according to claim 1, wherein an inner reinforcement having a rear end substantially coincident with a rear end of the reinforcing plate is provided inside the wheel house outer.