JP3663927B2 - Rear body structure of automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rear body structure of an automobile.
[0002]
[Prior art]
As a conventional rear body structure of an automobile, for example, there is a structure as disclosed in JP-A-5-16837. In other words, a long-length reinforcement in the front-rear direction is provided before and after the wheel house part via a gap as an impact absorbing part. In particular, the front end is connected to the lower part of the rear pillar so that the rear pillar, which forms the rear edge of the door opening formed on the side of the vehicle body, receives input applied from the rear due to a rear collision, etc. Has been. Therefore, when input from the rear is applied, the rear side force moves forward by an amount corresponding to the shock absorbing part to absorb some shock, and then pushes the front side force to input the lower part of the rear pillar. To communicate.
[0003]
[Problems to be solved by the invention]
However, in such a conventional technique, although the input from the rear is absorbed to some extent by the shock absorbing portion, the input is basically transmitted to the lower part of the rear pillar via the front and rear reinforcements. The lower part is deformed and the repair becomes troublesome. Further, since the front-side reinforcement needs to be a large size connected to the lower part of the rear pillar, it is disadvantageous in terms of weight and cost.
[0004]
The present invention has been made by paying attention to such a conventional technique, and even when receiving an input from the rear, the rear part of the automobile is advantageous in terms of weight and cost while minimizing deformation of the lower portion of the rear pillar. A vehicle body structure is provided.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a rear pillar that constitutes a rear edge portion of the door opening formed on the side of the vehicle body, a rear fender that extends rearward from the rear pillar, and a position below the rear pillar and the rear fender. In the rear body structure of an automobile having an arch-shaped wheel house outer, a rear window is connected to the outside of the wheel house outer with a lower end connected to the rear of the top of the wheel house outer and an upper end connected to the upper part of the rear pillar. An outer reinforcement that is connected to the vicinity of the glass opening and has a shape that is long in the vertical direction is provided so that the entire outer reinforcement is located behind the top of the wheel house outer, and the front side of the outer reinforcement to, via the shock absorbing portion of the predetermined intervals, and a reinforcing plate which is bonded to the upper surface of the wheel house outer, the foils The interior side of the Usuauta, in which the rear end is provided with a substantially matching inner reinforcement to the rear end of the reinforcing plate.
[0006]
According to the first aspect of the present invention, since the outer reinforcement has a shape that is long in the vertical direction, the rear window glass on the upper part of the rear pillar is input via the outer reinforcement by a rear collision or the like. It is transmitted to the vicinity of the opening and is not easily transmitted to the front side. The vicinity of the rear window glass opening at the top of the rear pillar is more easily deformed by input from the rear than the vicinity of the door opening on the side of the vehicle body. There is no disadvantage in terms of The input from the rear is weakened by deforming the lower part of the outer reinforcement, and then further weakened by the shock absorbing portion in front of the outer reinforcement. On the other hand, the part provided with the reinforcing plate is relatively stiffer than the shock absorbing part, so that the original shape is maintained without causing large deformation, and the deformation of the lower part of the rear pillar corresponding to the door opening on the side of the vehicle body is minimized. To the limit. In addition, 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.
In addition, since the wheel house outer always bends and deforms from the top, if the entire outer reinforcement is displaced rearward from the top of the wheel house outer, the wheel house outer is sure to be bent and deformed sufficiently. Energy absorption can be performed.
In addition, since the reinforcing plate can be reduced in size, there are less restrictions on welding points, and an inner reinforcement can be attached to the inside of the wheel house outer in the reinforcing plate portion to increase the rigidity of the vehicle body. Furthermore, by making the rear end of the inner reinforcement substantially coincide with the rear end of the reinforcing plate, the difference in strength between the reinforcing member and the impact absorbing portion can be further increased, and the deformation of the vehicle body at the time of collision can be easily controlled. it can.
[0009]
According to a second aspect of the present invention, the impact absorbing portion is at a position substantially coincident with the top portion of the wheel house outer.
[0010]
According to the invention described in claim 2 , since the shock absorbing portion is made to substantially coincide with the top portion of the wheel house outer that is originally easy to be broken, the energy absorption by the upward bending deformation from the top portion of the wheel house outer can be performed more stably and reliably. it can.
[0011]
In the invention according to claim 3 , the reinforcing plate extends to the front side along the wheel house outer, and the front end does not reach the door opening.
[0012]
According to the invention described in claim 3 , since the front end of the reinforcing plate does not reach the door opening, the deformation of the door opening can be minimized.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
[0016]
FIG. 1 is a side view showing a rear part of an automobile, and 1 shows a door opening formed in a side part of a vehicle body. A rear fender 2 that forms the outer wall of the vehicle body is formed behind the door opening 1. An arch-shaped wheel house outer 3 is formed on the inner side of the lower end of the rear fender 2.
[0017]
A part corresponding to the rear edge of the door opening 1 in the rear fender 2 is joined to the rear fender 2 from the inside of the vehicle by the pillar inner 6 and the wheel house outer 3 in the range from the roof 4 part to the side sill 5. A rear pillar 7 having a closed cross-sectional structure is formed in the direction. The front side of the rear pillar 7 corresponds to the door opening 1 on the side of the vehicle body, but the upper rear corresponds to the rear window glass opening 8.
[0018]
The lower ends of the wheel house outer 3 and the pillar inner 6 are connected to the rear of the top 3a of the wheel house outer 3, and the upper ends are connected to a rear window glass opening 8 formed at the upper part of the rear pillar 7. The outer reinforcement 9 is provided. The outer reinforcement 9 has a hat-shaped cross section and is elongated in the vertical direction, and forms a closed cross section by being joined to the rear pillar inner 6 and the wheel house outer 3 (see FIG. 4). The outer reinforcement 9 is slightly inclined rearward on the upper side, and the entire outer reinforcement 9 is located behind the top 3 a of the wheel house outer 3.
[0019]
On the front side of the outer reinforcement 9, a reinforcing plate having a substantially L-shaped cross section joined to the upper surface of the wheel house outer 3 with an impact absorbing portion S positioned at the top 3a of the wheel house outer 3 at a predetermined interval. 10 is provided. 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 stiffer than the shock absorbing portion S, and has a small size that does not reach the door opening 1.
[0020]
Thus, since the reinforcing plate 10 is small in size and has few restrictions on welding points, an inner reinforcement 11 having a hat-shaped cross section is attached to the inside of the wheel house outer 3 of the reinforcing plate 10 to provide a vehicle body. Stiffness can be increased. The inner reinforcement 11 has a tapered shape with a narrow upper width in a side view, and its rear end substantially coincides with the rear end of the reinforcing plate 10.
[0021]
Next, an operation when the input F due to a rear collision or the like is applied from the rear to the rear portion of the vehicle body and advantages of the present embodiment will be described.
[0022]
When an input F from the rear is applied to the rear part of the vehicle body, the outer reinforcement 9 has a shape that is long in the vertical direction. Therefore, the input F passes through the outer reinforcement 9 and the rear window glass opening at the upper part of the rear pillar 7. It is transmitted to the vicinity of 8 and is not easily transmitted to the front side. Accordingly, the vicinity of the rear window glass opening 8 above the rear pillar 7 is easily deformed, but the front side of the outer reinforcement 9 is not easily deformed. Originally, the vicinity of the rear window glass opening 8 is easily deformed by the input F from the rear as compared to the vicinity of the door opening 1, so that even if the input F is led to this part and deformed, the repairability is improved. There is no disadvantage in terms.
[0023]
The input F from the rear is weakened by deforming the lower portion of the outer reinforcement 9 and then further weakened by the shock absorbing portion S in front of the outer reinforcement 9. On the other hand, since the portion provided with the reinforcing plate 10 is relatively higher in rigidity than the shock absorbing portion S, the original shape is maintained without causing a large deformation, and the deformation of the lower part of the rear pillar 7 corresponding to the door glass opening is minimized. Can be suppressed. In particular, 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.
[0024]
And by the input F, the wheel house outer 3 is bent upward from the top part 3a, and can absorb energy. In this embodiment, since the entire outer reinforcement 9 is displaced rearward from the top 3a of the wheel house outer 3, the upper folding deformation of the wheel house outer 3 is reliable, and sufficient energy absorption by the deformation can be performed. it can.
[0025]
Further, since the shock absorbing portion S is made to substantially coincide with the top portion 3a of the wheel house outer 3 that is originally easy to break, the energy absorption by the upward bending deformation from the top portion 3a of the wheel house outer 3 can be performed more stably and reliably.
[0026]
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 vehicle body deformation at the time of collision can be easily controlled. can do.
[0027]
According to the first aspect of the present invention, since the outer reinforcement has a shape that is long in the vertical direction, the rear window glass on the upper part of the rear pillar is input via the outer reinforcement by a rear collision or the like. It is transmitted to the vicinity of the opening and is not easily transmitted to the front side. The part provided with the reinforcing plate is relatively stiffer than the shock absorbing part, so that the original shape is maintained without causing large deformation, and the deformation of the lower part of the rear pillar corresponding to the door opening on the side of the vehicle body is minimized. Can be suppressed. In addition, 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.
In addition, since the wheel house outer always bends and deforms from the top, if the entire outer reinforcement is displaced rearward from the top of the wheel house outer, the wheel house outer is sure to be bent and deformed sufficiently. Energy absorption can be performed.
In addition, since the reinforcing plate can be reduced in size, there are less restrictions on welding points, and an inner reinforcement can be attached to the inside of the wheel house outer in the reinforcing plate portion to increase vehicle body rigidity. Furthermore, by making the rear end of the inner reinforcement substantially coincide with the rear end of the reinforcing plate, the difference in strength between the reinforcing member and the impact absorbing portion can be further increased, and the deformation of the vehicle body at the time of collision can be easily controlled. it can.
[0029]
According to the invention described in claim 2 , since the shock absorbing portion is made to substantially coincide with the top portion of the wheel house outer that is originally easy to be broken, the energy absorption by the upward bending deformation from the top portion of the wheel house outer can be performed more stably and reliably. it can.
[0030]
According to the invention of claim 3 , since the front end of the reinforcing plate does not reach the door opening, the deformation of the door opening can be minimized.
[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 cross-sectional view taken along the line SA-SA shown in FIG.
3 is a cross-sectional view taken along line SB-SB in FIG.
4 is a sectional view taken along the line SC-SC shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door opening part 2 Rear fender 3 Wheel house outer 3a Top part 4 Roof 5 Side sill 6 Pillar inner 7 Rear pillar 8 Rear window glass opening part 9 Outer rain force 10 Reinforcement board 11 Inner rain force F Input S from rear S Shock absorption part

Claims (3)

A rear pillar that forms a rear edge portion of a door opening formed on the side of the vehicle body, a rear fender extending rearward from the rear pillar, and an arch-shaped wheel house outer positioned below the rear pillar and the rear fender In the rear body structure of an automobile equipped with
An outer rain having a shape that is long in the up-down direction, having a lower end connected to the rear side of the wheel house outer and a rear window glass opening in the upper part of the rear pillar. The force is provided so that the entire outer rain force is located behind the top of the wheel house outer,
A reinforcing plate joined to the upper surface of the wheel house outer on the front side of the outer reinforcement through shock absorbing portions at a predetermined interval ;
A rear body structure of an automobile, wherein an inner reinforcement having a rear end substantially coinciding with a rear end of the reinforcing plate is provided on the inner side of the wheel house outer . 2. The rear body structure of an automobile according to claim 1, wherein the shock absorbing portion is positioned substantially coincident with the top of the wheel house outer. The rear body structure of the automobile according to claim 1 or 2, wherein the reinforcing plate extends forward along the wheel house outer and the front end does not reach the door opening.

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