JPH077265Y2 - Automobile shock absorption structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention compresses and contracts a main member extending in the vehicle front-rear direction when a shock load is applied from the vehicle front-rear direction due to a collision or the like, and the impact load is applied. The present invention relates to a shock absorbing structure configured to absorb, and particularly to a reinforcing structure capable of improving the rigidity of the main member under normal conditions without adversely affecting the shock absorbing function of the main member.

[Conventional technology]

In many cases, a main member forming the skeleton of an automobile is provided with an attack absorbing structure for absorbing an impact load due to a collision from the front-rear direction of the vehicle. As this shock absorbing structure,
A large number of bead portions are formed on the main member extending in the vehicle front-rear direction fixed to the lower surface of the floor panel, and the impact load is absorbed by compressively breaking the bead portions when an impact load is applied. There is a structure.

[Problems to be solved by the invention]

However, in the case of the structure in which the bead portion is provided, the frame rigidity under normal conditions may be insufficient. If the main member is simply reinforced with a reinforcing plate or the like in order to secure the rigidity required in such a case, there is a concern that the impact absorbing function of the bead portion may be adversely affected.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a shock absorbing structure for an automobile capable of improving the vehicle body rigidity under normal conditions without impairing the shock absorbing function. .

[Means for solving problems]

According to the present invention, a large number of bead portions are provided at predetermined intervals on a main member, which is arranged and fixed on the lower surface of a floor panel and extends in the vehicle front-rear direction, and the bead portions are compressed and destroyed when an impact load is applied to absorb the impact. In the shock absorbing structure for an automobile, a reinforcing plate having a shape covering at least a lower portion of a side wall and a bottom wall of the main member is disposed and fixed to the main member, and the bead portion is provided at a portion corresponding to the bead portion of the reinforcing plate. It is characterized in that a notch portion is formed so that the above is exposed.

[Action]

According to the shock absorbing structure of the present invention, since the main member is reinforced by the reinforcing plate, the rigidity of the vehicle body during normal traveling can be improved. The bead portion, that is, the portion that is crushed and broken when an impact load is applied, is provided with a notch so that the bead portion is exposed to the outside without being covered. Therefore, the rigidity of the bead portion is more than necessary. The impact absorption function is hardly adversely affected.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 are views for explaining a shock absorbing structure for an automobile according to an embodiment of the present invention.

In the figure, reference numeral 1 is a rocker panel, which has a closed cross-sectional shape formed by joining an inner panel 1a and an outer panel 1b and extends in the vehicle front-rear direction. Has been done. The front end of the rear side member 2 which is the main member is connected to the rear end of the rocker panel 1 by welding. The rear side member 2 has a U-shaped cross section with an open upper end, and extends over the flange portion 2a bent outward in the opening and the connecting portion between the rear side member 2 and the rocker panel 1. Thus, the wheel house 3 is arranged and fixed.

The pair of left and right rocker panels 1 and 1 are connected by a front cross member 4, and the left and right rear side members 2 and 2 are connected by a rear cross member 5, respectively. Has been done. A center floor panel 6 and a rear floor panel 7 are arranged so as to cover the rear portion of the vehicle body frame, and the step portion 1c of the rocker panel 1, the rear side member 2, the flange portions 2a of the front and rear cross members 4 and 5 are respectively provided. , 4a, 5a, etc. are welded and fixed.

Further, the rear floor panel 7 is provided with a recessed portion 7a for storing a tire, and the vicinity of the center of the storage portion 7a is formed so as to bulge upward, whereby the bulging portion 7b and the rear cross member 5 are formed. A space A is provided between the flange portion 5a and the flange portion 5a. A reinforcing plate 9 is welded and fixed between the flange portions 5a, 5a in the space A portion.

As described above, the rear side panel 2 has a U-shape with an open upper end, and the left and right side walls 2b located below the flange 2a bent at the upper end are beaded at a predetermined pitch. The portion 2c is formed to extend in the vertical direction and to be concave inward. The bead portion 2c is for absorbing the impact load by compressing and breaking it when an impact load in the vehicle front-rear direction acts on the rear side member 2.

A reinforcing plate 11 is arranged and fixed in the vicinity of the connecting portion of the rear side member 2 with the rear cross member 5.
The reinforcing plate 11 is provided on the side wall 2b and the bottom wall 2e of the rear side member 2.
It has a U-shaped cross section and covers the rear half of the vehicle in the front-rear direction. Further, a cutout portion 11b that exposes the bead portion 2c outward is formed in a portion of the inclined side wall 11a of the reinforcing member 11 corresponding to each bead portion 2c.

Next, the function and effect of this embodiment will be described.

In the shock absorbing structure of this embodiment, when a shock load in the front-rear direction of the vehicle is applied and a shock load in that direction acts, the bead portion 2c of the rear side member 2 is compressed and broken, and the member 2
The whole contracts, and at that time, the shock is absorbed. Since the bead portion 2c is set to be weaker in strength than the other portions, there is a concern that the bead portion 2c may reduce the rigidity of the vehicle body frame during normal operation. On the other hand, in this embodiment, since the lower half portion of the rear side member 2 is covered with the reinforcing plate 11 having a U-shaped cross section and fixed by welding, the rigidity of the rear side member 2 during normal traveling can be improved. Therefore, the rigidity of the entire body frame during normal traveling can be secured.

On the other hand, if such a reinforcing plate is added, the impact absorbing function of the bead portion 2c may be impaired depending on the shape and the like. Therefore, in this embodiment, the notch 11b is formed in the portion corresponding to the bead portion 2c of the reinforcing plate 11, and the bead portion 2c is formed.
Is exposed to the outside. Therefore, it is possible to prevent the strength of the bead portion 2c from increasing more than necessary, and the original shock absorbing function for the shock load in the vehicle front-rear direction is not impaired.

In the above embodiment, the reinforcing plate 11 is configured to cover only the lower half of the side wall 2b of the rear side member 2, but the reinforcing plate may be configured to cover the upper half of the side wall 2b. Good.

Further, in the above embodiment, the case where the present invention is applied to the rear side member 2 has been described, but the present invention can be applied to other than the rear side member as long as it is a main member extending in the vehicle front-rear direction. For example, it can be applied to a main member extending in the vehicle front-rear direction at a position on the front side of the vehicle compartment.

[Effect of device]

As described above, according to the shock absorbing structure for an automobile of the present invention, the main member extending in the front-rear direction of the vehicle body is provided with a large number of bead portions, and the reinforcing plate having a shape covering at least the lower portion of the main member is arranged and fixed. Further, since the notch is formed in the portion corresponding to the bead portion of the reinforcing plate so that the bead portion is exposed, there is an effect that the rigidity during normal traveling can be secured without impairing the shock absorbing function.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 4 are views for explaining a shock absorbing structure of a vehicle according to an embodiment of the present invention, and FIG.
FIG. 2 is a sectional view taken along line II of FIG. 1, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. 4 is a perspective view of this embodiment. is there. In the figure, 2 is a rear side member (main member), 2c is a bead portion, 7 is a floor panel, 11 is a reinforcing plate, and 11b is a notch.

Claims (1)

[Scope of utility model registration request] 1. A main member, which is arranged and fixed to the lower surface of a floor panel and extends in the vehicle front-rear direction, is provided with a large number of bead portions at predetermined intervals, and the bead portions are compressed and destroyed when an impact load is applied. In a shock absorbing structure for an automobile configured to absorb a shock load, a reinforcing plate is disposed and fixed so as to cover at least a lower portion of the main member, and the bead portion is exposed at a portion corresponding to the bead portion of the reinforcing plate. A shock absorbing structure for an automobile, characterized in that a notch is formed as described above.