JP2795010B2 - Car front side member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front side member of an automobile, and more particularly, to a front side member of an automobile, which is formed by an inner panel and an outer panel so as to have a closed sectional shape and has sufficient rigidity against a force applied during normal running. On the other hand, the present invention relates to a front side member of a vehicle that buckles and deforms to absorb impact energy when the vehicle collides.

[0002]

2. Description of the Related Art When a vehicle collides, a front side member that buckles and absorbs impact energy is formed to have a closed cross section by an inner panel and an outer panel. (Japanese Utility Model Laid-Open No. 3-16580).

[0003]

In this case, the front side member can be formed by a thin plate material, and the weight can be reduced. On the other hand, if you make the board thinner,
Absorption of impact energy applied from the front becomes insufficient.

Incidentally, in order to facilitate buckling deformation of the front side member when impact energy is applied from the front, a rib extending vertically may be provided on the inner panel and the outer panel of the front side member (see the above publications). It is known that when such a rib is provided, the rib is buckled and deformed so as to become a valley.

An object of the present invention is to provide a front side member of an automobile which can be formed of a thin plate material and which can enhance the absorbing ability of impact energy.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to an inner panel having a plurality of vertically extending beads at a predetermined pitch, and an outer panel defining a closed section in combination with the inner panel, the plurality of beads extending vertically. Having a bead at a pitch substantially equal to the bead of the inner panel;
And an outer panel in which the plurality of beads are displaced by a half pitch with respect to the beads of the inner panel. A reinforce is disposed in the closed section. The reinforcement is formed in a corrugated shape protruding toward the bead at a portion corresponding to the bead of the inner panel and the outer panel.

[0007]

[Operation and effect] When impact energy is applied from the front,
The front side member is deformed in a bellows shape so that a bead between the inner panel and the outer panel becomes a valley. At this time, since the convex portion of the reinforce is located corresponding to each bead, the reinforce comes to resist deformation of the inner panel and the outer panel, and the reinforce and the inner panel and the outer panel are connected to each other. Deform while interfering with each other.

[0008] Since the reinforcement and the inner panel and the outer panel are deformed while interfering with each other, the deformation load of the front side member is increased, so that the ability to absorb impact energy is increased.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A front side member 10 of an automobile is disposed on each side of an engine room of the automobile. As shown in FIGS.
, An outer panel 14 and a reinforcement 16.

The inner panel 12 is formed of a flat plate, and has a plurality of beads 18 extending in a vertical direction at a predetermined pitch P. The bead 18 is formed as a recess in the embodiment shown, but it can also be outwardly convex. It is preferable that the length of the bead 18 in the vertical direction is determined so as not to reach the joint between the inner panel 12 and the outer panel 14.

The outer panel 14 is formed of a member having a U-shaped cross section. The outer panel 14 defines a closed cross section as shown in FIG. 2 in combination with the inner panel 12, and includes a plurality of beads 20 extending in the vertical direction. At a pitch P substantially equal to that of the bead 18. The bead 20 is formed as a concave when the bead 18 is concave, and as a convex when the bead 18 is convex outward.

The plurality of beads 20 of the outer panel 14 are
The outer panel 14 is disposed so as to be shifted by a half pitch with respect to the bead 18 of the inner panel 12,
And the outer panel 14 are spot-welded. Thereby, the inner panel 12 and the outer panel 14 have a closed cross section, and the bead 18 of the inner panel and the bead 20 of the outer panel are alternately positioned.

The reinforcement 16 is an inner panel 1.
2 and the outer panel 14 are arranged in a closed section defined by the outer panel 14 and the outer panel 14. As shown in FIG. 3, the reinforcement 16 has a projection 22 toward the bead 18 at a portion of the inner panel 12 corresponding to the bead 18, and further has a bead 20 at a portion corresponding to the bead 20 of the outer panel 14.
Is formed in a wave shape that becomes a convex 24 toward. As a result, in the plan view of FIG. 3, a substantially same curve as the sine curve is drawn. The reinforcement 16 is spot-welded to the outer panel 14 by upper and lower flanges.

When impact energy is applied from the front, the front side member 10 moves the bead 18 of the inner panel 12 and the outer panel 14 as shown by the imaginary line 11 in FIG.
Is deformed in a bellows shape so that the bead 20 is formed as a valley.
At this time, the convex portion 22 of the reinforce 16
Is the bead 18 and the convex portion 24 is the bead 20
, The reinforcement 16 resists deformation of the inner panel 12 and the outer panel 14, and the reinforcement 16 and the inner panel 12 and the outer panel 14 deform while interfering with each other. As a result, the deformation load of the front side member 10 becomes A in FIG. 4, which is larger than the deformation load B of the conventional one, and the impact absorption energy is increased by the hatch in the figure.

[Brief description of the drawings]

FIG. 1 is a perspective view of a front side member according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a schematic view showing the operation of the front side member according to the present invention in a planar state.

FIG. 4 is a characteristic diagram showing a correlation between a load and an amount of deformation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Front side member 12 Inner panel 14 Outer panel 16 Reinforcement 18, 20 Bead 22, 24 Convex part

Claims (1)

(57) [Claims] 1. An inner panel having a plurality of beads extending in a vertical direction at a predetermined pitch, and an outer panel defining a closed section in combination with the inner panel, the plurality of beads extending in the vertical direction being a bead of the inner panel. An outer panel having substantially equal pitches and an outer panel in which the plurality of beads are displaced by a half pitch with respect to the beads of the inner panel, wherein the outer side member is disposed in the closed cross section. A front side member of an automobile, comprising a reinforcement, wherein the reinforcement is formed in a wave shape that is convex toward the bead at a portion corresponding to the bead of the inner panel and the outer panel.