JPH09207816A - Vehicular front part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible for an upper member to be axially compressively deformed due to a heavy load, and for the upper member to be collapsed in a stable manner in the process of axial compressive deformation. SOLUTION: A bead 20 is formed on the side wall part 12C of an upper member outer panel 12, namely the outer side wall part across the vehicle width of an upper member 10. A notch 22 is formed on the side wall part 12C of the upper member outer panel 12. The notch 22 cuts upper side ridge lines 20C, 20D and lower side ridge lines 20E, 20F of the bead 20 separately. A rear side face 20G of the bead 20 positioned behind the notch 22 with respect to the vehicle is positioned on the outside across the vehicle width from the front side face 20H positioned ahead of the notch 22 with respect to the vehicle. When a rearward load is applied to the upper member 10, the front side face 20H of the bead 20 is structured to thrust into the inner side in the crosswise direction of the rear side face 20G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body front structure, and more particularly to a vehicle body front structure having an upper member extending in a vehicle front-rear direction.

[0002]

2. Description of the Related Art Conventionally, as an example of a vehicle body front portion structure of a vehicle such as an automobile having an upper member extending in the vehicle front-rear direction in a vehicle body front portion, there is Japanese Patent Laid-Open No. 4-63775.

As shown in FIG. 6, in this vehicle body front structure, a front part 70A of an apron lower frame 70 extending substantially horizontally in the vehicle front-rear direction and a front pillar 72 extend obliquely to an apron upper frame 74 (upper member). Also referred to as). Also, the rear half 70B of the apron lower frame 70 and the apron upper frame 74
The beads 76 and 78 are formed on the side surface of the rear half 74A of the vehicle, and when the front portion of the vehicle body receives an impact force,
Starting from 78, the second half 70B of the apron lower frame 70
Then, the rear half portion 74A of the apron upper frame 74 is deformed to absorb the impact force.

[0004]

However, in this vehicle body front structure, in order to increase the compression amount of the rear half portion 74A of the apron upper frame 74, the width of the bead 78 is widened or the number of the beads 78 is increased. These need to be increased, but these are the latter half 7 of the apron upper frame 74.
4A leads to a decrease in rigidity, and there is a possibility that the apron upper frame 74 may not be crushed in a stable manner during the axial compression deformation process under a high load.

In view of the above facts, it is an object of the present invention to obtain a vehicle body front structure in which the upper member undergoes axial compression deformation under a high load, and how the upper member is crushed during the axial compression deformation process is stable.

[0006]

According to a first aspect of the present invention, in a vehicle body front structure having an upper member extending in the vehicle front-rear direction, a bead extending in the vehicle front-rear direction on a vehicle width direction outer side wall portion of the upper member, A notch that divides the upper and lower ridges of the bead and extends in the up-and-down direction, and a rear side surface of the bead located at the vehicle rear side of the notch with respect to a front side surface of the bead located at the vehicle front of the notch The feature is that it is offset in the vehicle width direction.

Therefore, when a rearward load is applied to the upper member, the front side surface of the bead located in front of the vehicle in the cutout bites into a position offset in the vehicle width direction with respect to the rear side surface of the bead located in the rear of the cutout vehicle.

According to a second aspect of the present invention, in a vehicle body front structure having an upper member extending in the vehicle front-rear direction, a bead extending in the vehicle front-rear direction on a vehicle width direction outer side wall portion of the upper member, and upper and lower ridge lines of the bead. And a notch extending in the up-and-down direction, and a rear side surface of the bead located at the vehicle rear side of the notch is positioned outside the front side surface of the bead located at the vehicle front side of the notch in the vehicle width direction. It is characterized by being.

Therefore, when a rearward load is applied to the upper member, the front side surface of the bead located in front of the vehicle in the cutout bites into the inner side in the vehicle width direction of the rear side surface of the bead located in the rear of the cutout vehicle.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a vehicle body front structure of the present invention will be described with reference to FIGS.

In the figure, an arrow FR indicates a vehicle front direction, an arrow IN indicates a vehicle width inside direction, and an arrow UP indicates a vehicle upward direction.

As shown in FIG. 1, in the vehicle body front structure according to the first embodiment, a pair of left and right upper members 10 are arranged on the upper portion of the vehicle body along the vehicle front-rear direction, and these upper members 10 are respectively arranged. It is arranged outside the suspension tower 11 in the vehicle width direction. The upper member 10 is composed of an upper member outer panel 12 that constitutes an outer side portion of the upper member 10 in the vehicle width direction, and an upper member inner panel 14 that constitutes an inner side portion of the upper member 10 in the vehicle width direction.

The cross-sectional shape of the upper member outer panel 12 when viewed from the front of the vehicle is a U-shape with the opening facing the inner side of the vehicle width, and the upper flange formed at the upper end of the opening and extending inward the vehicle width. 12A and a lower flange 12B formed at the lower end of the opening and extending downward in the vehicle, respectively, and an upper flange 14A formed at the upper end of the upper member inner panel 14 and extending in the vehicle width direction, and an upper member inner panel 14 of the upper member inner panel 14. It is welded to the lower edge 14B.

Therefore, the upper member 10 has a closed cross-section portion 16 formed by the upper member outer panel 12 and the upper member inner panel 14 and extending in the vehicle front-rear direction. The rear end of the upper member 10 is connected to the front pillar 18.

A bead 2 extending in the vehicle front-rear direction is provided in a vehicle vertical direction center portion of a side wall portion 12C of the upper member outer panel 12 which is an outer side wall portion of the upper member 10 in the vehicle width direction.
0 is formed. The bead 20 is recessed inward in the vehicle width direction, the front end portion 20A is located near the vehicle front side of the suspension tower 11, and the rear end 20B is located near the vehicle front side of the front pillar 18. .

Side wall portion 1 of the upper member outer panel 12
A cutout 22 extending in the vehicle up-down direction is formed in 2C. The notch 22 has an oval shape in a side view, and the upper ridge lines 20C and 20D of the bead 20 and the lower ridge line 2 are formed.
0E and 20F are divided respectively.

As shown in FIG. 2, the rear side surface 20G of the bead 20 located rearward of the notch 22 in the vehicle is located outside the front side surface 20H of the bead 20 located forward of the notch 22 in the vehicle width direction. When a rearward load is applied to the upper member 10, as shown by the phantom line in FIG.
The front side surface 20H of the front side bites into the inside of the rear side surface 20G of the bead 20 located behind the vehicle in the notch 22 in the vehicle width direction.

Next, the operation of the first embodiment will be described. In the first embodiment, when a rearward load (arrow F in FIG. 3) acts on the upper member 10, the front side surface 20H of the bead 20 and the rear side surface 20G of the bead 20 do not come into contact with each other.
As shown in, the front surface 20H of the bead 20 has a cutout 2
2 of the bead 20 located at the rear of the vehicle bites into the rear side surface 20G of the bead 20 in the vehicle width direction.

Therefore, the compression amount of the upper member 10 can be increased even with one notch 22. Further, since the bead 20 is formed, the rigidity of the upper member 10 in the front-rear direction does not significantly decrease, the upper member 10 is axially compressed and deformed under a high load, and the manner in which the upper member 10 is crushed during the axially compressive deformation process is stabilized.

Next, a second embodiment of the vehicle body front structure of the present invention will be described with reference to FIGS.

The same members as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 4, in the second embodiment, the rear side surface 20G of the bead 20 located at the vehicle rear side of the notch 22 is more than the vehicle width than the front side surface 20H of the bead 20 located at the vehicle front side of the notch 22. When the rear load is applied to the upper member 10, the front side surface 20H of the bead 20 is located on the inner side in the direction, and the rear side surface 20G of the bead 20 located on the rear side of the vehicle in the notch 22 is positioned as shown by an imaginary line. It is designed to bite outside in the vehicle width direction.

Next, the operation of the second embodiment will be described. In the second embodiment, when a rearward load (arrow F in FIG. 3) acts on the upper member 10, the front side surface 20H of the bead 20 and the rear side surface 20G of the bead 20 do not come into contact with each other.
As shown in, the front surface 20H of the bead 20 has a cutout 2
No. 2 bite to the outside of the rear side surface 20G of the bead 20 located behind the vehicle in the vehicle width direction.

Therefore, the compression amount of the upper member 10 can be increased even with one notch 22. Further, since the bead 20 is formed, the rigidity of the upper member 10 in the front-rear direction does not significantly decrease, the upper member 10 is axially compressed and deformed under a high load, and the manner in which the upper member 10 is crushed during the axially compressive deformation process is stabilized.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are included in the scope of the present invention. It is clear to a person skilled in the art that is possible. For example, in each of the above-described embodiments, the bead 20 is recessed inward in the vehicle width direction, but instead of this, the bead 20 is recessed.
May be recessed outward in the vehicle width direction. Further, in each of the above-described embodiments, the bead 20 and the notch 22 are each one, but a plurality of the bead 20 and the notch 22 may be formed.

[0026]

According to the present invention described in claim 1, there is provided a vehicle body front structure having an upper member extending in a vehicle front-rear direction,
The upper member has a bead extending in the vehicle front-rear direction on the outer side wall in the vehicle width direction, and a notch that extends in the up-down direction by dividing the upper and lower ridge lines of the bead, and the rear side surface of the bead located behind the notch has a notch. Since it is configured to be offset in the vehicle width direction with respect to the front side surface of the bead located in front of the vehicle, the upper member undergoes axial compression deformation under high load, and the crushing of the upper member during the axial compression deformation process is stable. Has excellent effect.

According to a second aspect of the present invention, in a vehicle body front structure having an upper member extending in the vehicle front-rear direction, a bead extending in the vehicle front-rear direction on a vehicle width direction outer side wall portion of the upper member and upper and lower ridge lines of the bead are divided. Since the rear side surface of the bead located at the vehicle rear side of the notch is positioned outside the front side surface of the bead located at the vehicle front side of the notch, the notch extends in the vehicle width direction. This has an excellent effect that the upper member is axially compressed and deformed under a high load, and the crushing manner of the upper member in the axial compressive deformation process is stable.

[Brief description of drawings]

FIG. 1 is a perspective view of a vehicle body front structure according to a first exemplary embodiment of the present invention, as viewed from a vehicle diagonally outer side.

FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1 showing a part of FIG.

FIG. 3 is a perspective view showing an operation of the vehicle body front structure relating to the first exemplary embodiment of the present invention, as seen from the vehicle diagonally outer side.

FIG. 4 is a sectional view corresponding to FIG. 2, showing a vehicle body front structure according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing an operation of the vehicle body front structure according to the second exemplary embodiment of the present invention, as viewed from the vehicle front diagonally outer side.

FIG. 6 is a perspective view showing a vehicle body front structure according to a conventional embodiment, as viewed obliquely from the front and outside of the vehicle.

[Explanation of symbols]

 10 Upper member 12 Upper member outer panel 12C Upper member outer panel side wall portion 14 Upper member inner panel 20 Bead 20C Bead upper ridge line 20D Bead upper ridge line 20E Bead lower ridge line 20F Bead lower ridge line 20G After bead Side 20H Front side of bead 22 Notch

Claims (2)

[Claims] 1. In a vehicle body front structure having an upper member extending in the vehicle front-rear direction, a bead extending in the vehicle front-rear direction on a vehicle width direction outer side wall portion of the upper member and an upper ridge line of the bead are divided to extend in the vertical direction. A notch, wherein a rear side surface of the bead located on the vehicle rear side of the notch is offset in the vehicle width direction with respect to a front side surface of the bead located on the vehicle front side of the notch. Body front structure. 2. A vehicle body front structure having an upper member extending in the vehicle front-rear direction, wherein a bead extending in the vehicle front-rear direction on a vehicle width direction outer side wall of the upper member and an upper and lower ridge line of the bead are divided to extend in the up-down direction. A vehicle body, comprising: a notch, wherein a rear side surface of the bead located at a vehicle rear side of the notch is located outside a front side surface of the bead located at a vehicle front side of the notch in a vehicle width direction. Front structure.