JPH042103Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a bumper mounting structure for a traveling vehicle.

An example of a conventional bumper mounting structure is shown in FIG. In this figure, a bumper stay 2 extends in a direction perpendicular to the bumper 1 indicated by a chain line,
Supports bumper 1. On the other hand, the front pillar outer 3 stands up on both sides in the width direction of the traveling vehicle (not shown) and has a concave cross section with openings facing each other, and the front pillar inner 4 has a concave cross section with openings facing each other. It is closed and cooperates with the front pillar outer 3 to form a cylindrical cross section, and the two are substantially integrated through spot welding. Bumper stay reinforcement 5 is bumper stay 2
This reinforcing plate has approximately the same width as the front pillar outer 3 and has a length that can be accommodated inside the front pillar outer 3. The bumper stay 2 and the bumper stay reinforcement 5 sandwich the front pillar inner 4,
The three pieces are tightened by two sets of bolts 6 and nuts 7.

With the above configuration, when the impact force F shown in the figure acts on the bumper 1, the impact force F acts to move the bumper stay 2 in the direction of force F, but the front pillar inner The impact force F is absorbed by applying force to 4 and causing it to deform. Therefore, the distance a from the bumper 1 to the bolt 6 on the bumper 1 side is an area that hardly functions to absorb the impact force F, and in order to shorten the distance a, the front pillar outer 3 must be made large as a result. This resulted in a problem of increased weight and cost.

The present invention was made in order to solve the conventional problems, and an object of the present invention is to provide a lightweight bumper mounting structure that absorbs the impact force applied to the bumper.

In order to achieve this objective, the present invention is characterized in that the bumper retaining force, whose ends are fixed to the bumper stay with bolts, is arranged so as to be centered on the vertical wall on the bumper side of the front pillar outer. It is something.

The illustrated embodiment will be described in detail below.
In FIG. 1, the bumper stay 12 supporting the bumper 1 has approximately the same length as the conventional one, but the bumper stay 15 is longer than the conventional one and one end 15a is closer to the bumper 1. As is conventional, the front pillar inner 14 is sandwiched between the bumper stay 12 and the bumper stay reinforcement 15, and is spot welded so as to close the opening of the front pillar outer 13. However, the feature of the present invention is that the opening width of the front pillar outer 13 is formed narrowly, and the vertical wall 13a on the bumper 1 side is located approximately at the center of the bumper stay reinforcement 15.
Bolts 16A, 16B and nuts 17A, 17B are located on both sides of point a, respectively. That is, on the outside of the vertical wall 13a, the bumper stay 12 and the bumper stay reinforcement 15 are firmly tightened with bolts 16A and nuts 17A with the front pillar inner 14 in between, and inside the front pillar outer 13, the bolts 16B and It is similarly tightened with nut 17. In addition, front pillar inner 1
4. It is important that the bumper stay reinforcement 15 and the front pillar outer 13 are substantially integrated by spot welding S. Furthermore, the number of bolts is not limited to two, and may be three or more.

With the above configuration, the impact force applied to the bumper 1 is transmitted to the bumper stay 12, and then transmitted to the bumper stay support 15 by the bolts 16A, and further to the front pillar inner 14 and front pillar outer vertical wall 13a. Dispersed and absorbed. In other words, impact energy is absorbed much more efficiently than in the past. Moreover, the front pillar outer 13 is made smaller.

Therefore, the bumper mounting structure according to the present invention efficiently absorbs the impact force applied to the bumper, reduces the distance from the bolt 16A to the bumper, and exhibits the advantages of being lightweight and low cost.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing a bumper mounting structure according to the present invention, and FIG. 2 is a partially cutaway perspective view showing a conventional example. 1... Bumper, 2, 12... Bumper stay, 3, 13... Front pillar outer, 4, 1
4... Front pillar inner, 5, 15... Bumper stay reinforcement, 6, 16A, 16B...
...Bolt, 7, 17A, 17B...Natsuto.

Claims (1)

[Scope of utility model registration request] a front pillar outer having a concave cross section; a front pillar inner having a cylindrical cross section formed on the front pillar outer through spot welding;
A bumper stay that is attached to this front pillar inner and supports the bumper, a bumper stay reinforcement that is opposed to this bumper stay via the front pillar inner, and these bumper stays, front pillar inner, and bumper stay. Tighten 3 pieces of force 2
In a bumper mounting structure having more than one bolt, at least one bolt is located between the bumper and the front pillar outer, and the bumper side edge of the front pillar outer connects the bumper stay face and the front pillar inner. A bumper mounting structure characterized by being substantially fixed together through spot welding.