JP3225973B2 - Vehicle bumper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Object of the invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcement used in a vehicle bumper device.

[0003]

2. Description of the Related Art Conventionally, as this type of reinforcement, one disclosed in Japanese Utility Model Laid-Open Publication No. 1-120457 is known. This is because a rear wall fixed to the vehicle, a step portion disposed opposite the rear wall, a front portion having a predetermined distance to the rear wall, and a predetermined distance shorter than the front portion to the rear wall. A front wall having a rear portion having a front wall, an upper wall and a lower wall connecting the rear wall and the front wall, and a front wall provided between the upper wall and the lower wall in front of a stepped portion between the rear wall and the front wall. And a middle wall connecting the partial side, and a load input to the bumper device is received by the front wall at the time of a vehicle collision or the like, and the load is applied to the upper wall, the lower wall, and the middle wall. It was absorbed by buckling deformation and the like.

[0004]

However, in the above-described reinforcement, the intermediate wall is connected to the front portion of the step and connects the rear wall and the front wall. An acute portion exists due to the step at the connection portion with the wall. For this reason, in the formation of the reinforcement by extrusion or pulling out, a portion where the sharp portion of the mold is formed has a sharp shape, and wear of the portion is shortened, such as accelerated wear or breakage at this portion. It was. In addition, if the radius of the portion is increased or the build-up is performed in order to eliminate the sharp portion, not only the weight is increased but also the molding becomes difficult.

Accordingly, an object of the present invention is to provide a reinforcement having a cross-sectional shape that can improve the life of a molding die.

[0006]

Configuration of the Invention

[0007]

The technical measures taken in the present invention to solve the above-mentioned technical problems include a rear wall fixed to a vehicle, and at least one step arranged opposite to the rear wall. A front wall having a portion, a front portion having a predetermined distance with respect to the rear wall, and a rear portion having a predetermined distance shorter than the front portion with respect to the rear wall; and the rear wall and the front wall. Having an upper wall and a lower wall to be connected to each other, and an intermediate wall disposed between the upper wall and the lower wall to connect the rear wall and the rear part of the front wall to the rear portion of the stepped portion. is there.

[0008]

The above technical means operates as follows. Since the intermediate wall is connected to the rear portion of the step portion and connects the rear wall and the front wall, no sharp portion is formed at the connection portion between the intermediate wall and the front wall. As a result, there is no sharp part in the mold, and abnormal wear and breakage are reduced,
Mold life can be improved.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the bumper device 1 comprises:
Reinforcement 2, urethane 3, and skin 4 are provided. The reinforcement 2 is fixed to the vehicle body 5 via a bracket (not shown),
The urethane 3 is disposed in front of the reinforcement 2 to form a shape as the bumper device 1 and to absorb a load inputted in a vehicle collision or the like to some extent. The skin 4 is fixed to the vehicle body 5 and the reinforcement 2 and covers the reinforcement 2 and the urethane 3 to form an exterior.

As shown in FIGS. 1 and 2, the reinforcement 2 has a cross section including a rear wall 6, a front wall 7, an upper wall 8 and a lower wall 9 to which a bracket held by a vehicle body 5 is fixed. It has a rectangular shape and is integrally formed by extruding or drawing aluminum material or the like. The rear wall 6 is fixed to a bracket 7 held by the vehicle body, and the front wall 7 is arranged opposite to the rear wall 6 and holds the urethane 3. It is connected by a lower wall 9. The front wall 7 is formed with a stepped portion 7a formed at an angle, a front portion 7b having a predetermined distance A with respect to the rear wall 6 is formed above the front, and a lower portion with respect to the rear wall 6 below. A rear portion 7c having a predetermined interval B shorter than the interval A is formed. An intermediate wall 10 that connects the rear wall 6 and the front wall 7 is provided integrally between the upper wall 8 and the lower wall 9.
The intermediate wall 10 is connected to the front wall 7 at a rear portion side 7d of the step portion 7a.

In the bumper device 1 having the above-described configuration, when a load due to an impact is inputted, such as at the time of a vehicle collision, the load is received by the front wall 7 and the upper wall 8, the lower wall 9 and the intermediate wall 10
Buckling deformation.

As described above, the intermediate wall 10 is connected to the front wall 7 at the rear portion side 7d of the step portion 7a, and does not form an acute angle at the connected portion. As a result, in forming the reinforcement 2, there is no sharp portion in the mold, and abnormal wear and breakage are reduced. As a result, the mold life is improved. Also, the specially large R
It does not require a portion or a build-up, and does not cause an increase in weight or difficulty in molding. Further, since the intermediate wall 10 is substantially shortened, the weight is reduced and the buckling strength is improved.

The step 7a of the front wall 7 may be a step 7e parallel to the intermediate wall 10, as shown in FIG. Further, as shown in FIG. 4, an intermediate wall 11 may be provided in addition to the intermediate wall 10 according to the size of the reinforcement 2.

[0015]

According to the present invention, there is provided a vehicle bumper device having a reinforcement internally fixed to a vehicle.
The reinforcement includes a rear wall fixed to a vehicle, at least one stepped portion disposed opposite to the rear wall, a front portion having a predetermined distance from the rear wall, and a rear wall. A front wall having a rear portion having a shorter predetermined distance than the front portion, an upper wall and a lower wall connecting the rear wall and the front wall, and being disposed between the upper wall and the lower wall. Since the vehicle bumper device includes the rear wall and an intermediate wall connecting the rear portion side of the stepped portion of the front wall, the following effects are obtained.

In the formation of the reinforcement, there is no sharp portion in the mold, and abnormal wear and breakage are reduced. As a result, the life of the mold can be improved.

It is possible to prevent an increase in weight and difficulty in molding without the need for a specially large R portion or buildup.

The intermediate wall is substantially shortened, so that the weight and the buckling strength can be further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a bumper device according to the present invention.

FIG. 2 is a sectional view showing the reinforcement of FIG. 1;

FIG. 3 is a cross-sectional view corresponding to FIG. 2, showing a modification of the reinforcement.

FIG. 4 is a sectional view corresponding to FIG. 2, showing a modification of the reinforcement.

[Explanation of symbols]

 2 Reinforcement 6 Rear wall 7 Front wall 8 Upper wall 9 Lower wall 10 Intermediate wall 7a Stepped portion 7b Front portion 7c Rear portion

Claims (1)

(57) [Claims] 1. An extruder or puller internally secured to a vehicle.
In a vehicle bumper device having a punched reinforce, the reinforcement includes a rear wall fixed to a vehicle, at least one stepped portion disposed opposite the rear wall, and a rear wall. A front wall having a front portion having a predetermined distance with respect to the front wall and a rear portion having a predetermined distance shorter than the front portion with respect to the rear wall; and an upper wall and a lower portion connecting the rear wall and the front wall. A middle wall disposed between the upper wall and the lower wall, the middle wall connecting the rear wall and a rear portion of the stepped portion of the front wall.
And a front wall, wherein a sharp portion is not generated at a connection portion between the vehicle and the front wall .