JPH06156167A - Bumper reinforcing member mounting structure of automobile - Google Patents

Abstract

PURPOSE:To provide a bumper reinforcing member mounting structure of an automobile where the bolt tightening rigidity is increased, and the torsional rigidity of the automobile body supporting member is improved by the rigidity of the reinforcing member itself. CONSTITUTION:In a bumper reinforcing member mounting structure, a reinforcing member 20 of an automobile is mounted on a supporting member 22 of the automobile body. The reinforcing member 20 consists of a hollow body having a side wall 24 opposite to the supporting member 22 and a bulkhead 25 which is provided with an interval from the side wall 24 in the longitudinal direction of the automobile body and extends in the vertical direction. The reinforcing member 20 is mounted on the supporting member 22 by penetrating a bolt 34 through the bulkhead 25, the side wall 24 and the supporting member 22, and screwing a nut 36 into the bolt 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bumper reinforcing member mounting structure for an automobile, and more particularly to a mounting structure applicable when the reinforcing member is a hollow body.

[0002]

2. Description of the Related Art For the purpose of reducing the weight of a bumper reinforcing material and, in turn, the weight of an automobile itself, the reinforcing material may be changed from iron to aluminum. At the time of the change, the reinforcing material is formed of a hollow body, Increased rigidity and absorbency of impact force (Japanese Utility Model Publication No. 3-49144). That is, as shown in FIG. 4, the reinforcing member 10 is formed of a hollow body, and vertical ribs 11 and longitudinal ribs 12 are provided, or a plurality of hollow bodies are combined as described in the above publication. Use as a reinforcing material.

Since the reinforcing material 10 has a function of deforming when an impact force is applied and absorbing the impact force, it is necessary to secure a span S as a deformable region in the reinforcing material 10. Therefore, the side wall 14 of the reinforcing material facing the support member 13 of the vehicle body is attached to the support member 13 with the bolt 15 and the nut 16 (FIG. 8 of the above publication).

[0004]

In the above mounting structure,
Since the side wall 14 is attached to only one plate, so to speak, the tightening rigidity of the bolt is low, and the rigidity of the reinforcing material 10 does not contribute to the improvement of the torsional rigidity of the support member 13.

It is an object of the present invention to provide a mounting structure for a bumper reinforcing member of an automobile, which can improve the tightening rigidity of a bolt and the torsional rigidity of a supporting member of a vehicle body by the rigidity of the reinforcing member itself.

[0006]

SUMMARY OF THE INVENTION The present invention is a structure for attaching a reinforcing member for a bumper of an automobile to a supporting member for a vehicle body, the reinforcing member including a side wall facing the supporting member and a side wall of the vehicle body from the side wall. It is made of a hollow body having a partition wall extending in the front-rear direction and extending in the up-down direction, and a bolt penetrates the partition wall, the side wall and the support member, and a nut is screwed into the bolt to attach the reinforcing member. .

[0007]

[Operation and effect] Since the bolt penetrates the partition wall, the side wall and the support member, and the tightening force is received by the closed cross-section portion defined by the side wall and the partition wall in the reinforcing member,
The tightening rigidity of the bolt becomes high.

The tightening rigidity of the bolt is high, and there is a closed cross section having a high rigidity between the reinforcing member and the supporting member, and the reinforcing member is attached to the supporting member through this closed cross section. Therefore, the torsional rigidity of the support member can be increased by the rigidity of the reinforcing material. As a result, it is possible to prevent the support member from vibrating due to a forced input from the tire without providing any reinforcement to the support member, and contribute to the improvement of steering stability.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has a structure in which a reinforcing member 20 for an automobile bumper is attached to a support member 22 for a vehicle body. The structure for connecting the bumper and the reinforcing member 20 is the same as that of the conventional one, and therefore is not shown.

The reinforcing member 20 is a hollow body having a side wall 24 facing the support member 22 and a partition wall 25 extending from the side wall 24 in the longitudinal direction of the vehicle body and extending in the vertical direction.

In the illustrated embodiment, the stiffener 20 is a partition wall 2.
5, a side wall 26 spaced from the upper part, an upper piece 27, and a lower piece 28.
And the side walls 24, 26, the upper piece 27 and the lower piece 28 have a substantially square cross section. The reinforcing material 20 is obtained by extruding aluminum. At the time of molding, it is preferable to form, outside the partition wall 25, a central rib 29 extending in the front-rear direction and ribs 30 to be positioned above and below a bolt described later. Further, a rib 31 extending in the vertical direction can be provided if necessary. The reinforcing member 20 is formed so that the cross-sectional shape of FIG. 1 is continuous in the direction perpendicular to the paper surface, that is, in the lateral direction of the vehicle body.

The distance L2 between the side wall 24 and the partition wall 25 is an appropriate length in consideration of the length L1 of the reinforcing member 20 in the front-rear direction and the span S of the deformable region required for the reinforcing member 20. .

The reinforcing member 20 is attached to the supporting member 22 by penetrating the bolt 34 through the partition wall 25, the side wall 24 and the supporting member 22 of the reinforcing member 20 and screwing the nut 36 into the bolt 34.

A hole 38, which is larger than the diameter of the head of the bolt 34 and into which a tool is inserted, is formed in the side wall 26 of the reinforcing member 20, and a bolt hole 40 is formed in the partition wall 25 and a bolt hole 4 is formed in the side wall 24.
Open two. As shown in FIG. 3, the three holes 38, 40 and 42 are opened so that the centers of the holes 38, 40 and 42 are located on the same straight line. The two bolt holes 40 and 42 have the same diameter.

When the rib 30 is provided close to the bolt 34, as shown in FIG. 2, the rib 30 is positioned closer to the bolt 34 than the outer peripheral surface 45 of the washer or collar 44, that is, the outer peripheral surface. The position of the rib 30 is determined so that the distance a (≧ 0) exists between the rib 45 and the rib 30. This prevents the partition wall 25 from buckling when the reinforcing member 20 is attached to the support member 22, and further enhances the tightening rigidity of the bolt 34.

In the illustrated embodiment, the support member 22 comprises a front side member 50, a reinforcement 52 welded to the front end of the front side member 50, and a reinforcement 54 welded to the reinforcement 52.
Bolt holes 56 are formed in the two reinforcements 52 and 54, respectively.

To attach the reinforcing member 20 to the support member 22, the nut 36 is aligned with the bolt holes 56 of the reinforcements 52 and 54 and welded in advance, and the bolts 34 are attached.
Insert the tool through the hole 38 and insert the bolt holes 40, 4
Insert in 2 and screw in. As a result, the bolt 34 is fixed to the support member 22 via the closed cross section defined by the side wall 24, the partition wall 25, a part of the upper piece 27 and a part of the lower piece 28.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of an attachment structure for a bumper reinforcement member for an automobile according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing the vicinity of the bolt of FIG.

FIG. 3 is a perspective view showing a part of the bumper reinforcement member shown in FIG.

FIG. 4 is a vertical cross-sectional view of a conventional bumper reinforcement attachment structure.

[Explanation of symbols]

 20 Reinforcement Material 22 Support Member 24, 26 Side Wall 25 Partition Wall 29, 30 Rib 34 Bolt 36 Nut

Claims (1)

[Claims] 1. A structure for attaching a reinforcing member for a bumper of an automobile to a supporting member for a vehicle body, wherein the reinforcing member is provided with a side wall facing the supporting member and a space from the side wall in a front-rear direction of the vehicle body. And a partition wall extending in the up-and-down direction, which is a hollow body. A bolt penetrates the partition wall, the side wall, and the support member, and a nut is screwed into the bolt to mount the reinforcing member. Construction.