JPH0646762Y2 - Bumper mounting structure - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a bumper mounting structure for an automobile,
In particular, it relates to a structure for increasing the mounting strength of the bumper to the vehicle body.

[Conventional technology]

2. Description of the Related Art In automobiles, bumpers are attached to the front and rear ends of a vehicle body to absorb the impact of a light collision of the vehicle. 3 to 5 are views for explaining an example of such a conventional front bumper mounting structure. FIG. 3 is an external view of a general vehicle body, and FIG. 4 is a front view of FIG. FIG. 5 is an enlarged perspective view of a portion B of the bumper, FIG. 5 is an enlarged view of a mounting portion (C portion) of the front bumper of FIG. 4, FIG. 5A is a perspective view, and FIG. ) Is a cross-sectional view taken along the line Vb-Vb of FIG.

In the figure, reference numeral 2 is a resin-made front bumper attached to the vehicle body 1, and box-shaped bumper attachment portions 3 and 4 are formed in the lower center portion and the rear surface sides of the both side portions. The bottom surfaces of these mounting portions 3 and 4 are mounting surfaces 3a and 4a, respectively.The mounting surface 3a has a bumper mounting bolt hole 3b, and the mounting surface 4a has a bumper mounting bolt hole and a temporary fixing pin ( (Not shown) is formed. The inside of the mounting portion 4, that is, the surface side of the front bumper 2 also serves as a storage portion for the signal lamp.

The front bumper 2 is mounted by temporarily fixing it to a predetermined position on the vehicle body side using the temporary fixing pin, and in this state, the lower mounting portion 3 is attached to the nut 6b fixed to the bracket 5 at the lower center of the front surface of the vehicle body. The bolt 6a is fixed by screwing it in, and the side mounting portion 4 is fastened and fixed to a bracket (not shown) on the side of the vehicle body by a bolt or the like. Then, the bumper accessories such as a signal lamp (not shown) are attached.

[Problems to be solved by the invention]

However, in the conventional front bumper mounting structure, a flat surface continues around the lower mounting portion 3 of the front bumper 2 as shown in FIG. 5, and the rigidity of the entire mounting portion 3 is not so high. Therefore, for example, when the front bumper is subjected to an inertial force due to the vertical movement of the vehicle body during traveling or a shock during a collision, a large dynamic deformation is likely to occur.

The present invention has been made to solve such a problem, and it is possible to increase the rigidity of the entire mounting portion of the bumper to the vehicle body side with a simple structure, thereby increasing the mounting strength of the bumper. The purpose is to obtain a bumper mounting structure that can

[Means for solving problems]

In the bumper mounting structure according to the present invention, a step is provided between a predetermined portion of the resin bumper surface and a bumper base surface around the predetermined portion to form the predetermined portion as a bumper support portion, and a part of the bumper support portion is provided. It is characterized in that it is recessed into a concave shape to form an attachment portion with the vehicle body side.

Here, the present invention can be applied to both the front bumper and the rear bumper.

[Action]

In this invention, since a step is formed between the bumper support portion on the surface of the resin bumper and the bumper base surface around the bumper support portion, a vertical wall standing upright from the bumper base surface is formed around the bumper support portion. The vertical wall increases the surface rigidity. Therefore, when the mounting portion of the bumper is fixed to the vehicle body side, the mounting strength between the bumper and the vehicle body side can be increased. As a result, even if an inertial force due to the vertical movement of the vehicle body during traveling or an impact force due to a collision acts on the front bumper, dynamic deformation of the front bumper can be suppressed as much as possible.

Further, since the rigidity is increased by forming a step between the mounting portion of the bumper and the peripheral portion thereof, the structure is simple and the cost is not increased.

〔Example〕

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

1 and 2 are views for explaining a front bumper mounting structure according to an embodiment of the present invention. FIG. 1 is a partial perspective view showing a lower mounting portion of the front bumper, and FIG. ) Is an enlarged perspective view showing the side portion (A portion) of the front bumper in FIG. 1, and FIG. 2 (b) is IIb-IIb in FIG. 2 (a).
It is a line sectional view.

In the figure, 7 is a bumper support portion formed in the lower center of the front bumper 2, and the surface of the portion 7 projects slightly forward with respect to the surface of the bumper base portion 2a around the support portion. Bumper support part 7 and bumper base 2a
A vertical wall 7a that stands upright is formed at a boundary portion between and. Reference numeral 8 denotes a box-shaped bumper mounting portion, which is formed on the bumper support portion 7 so as to project toward the vehicle body. The mounting surface 8a, which is the bottom surface of the bumper mounting portion 8 with the bracket 4 on the vehicle body side, is similar to the conventional structure shown in FIG.
A bumper mounting bolt hole 8b is formed.

An air guide port 9 for guiding air to the inside of the vehicle body is formed in the bumper support portion 7 adjacent to the bumper mounting portion 8. A flange portion 9a is bent inward at the peripheral portion of the air guide port 9, and the rigidity of the air guide port 9 is increased by the flange 9a.

The other structure is the same as that of the front bumper shown in FIG.

Next, the function and effect will be described.

In such a front bumper mounting structure of the present embodiment, a step is formed between the predetermined surface portion of the resin front bumper 2 and the bumper base portion 2a around the predetermined portion to form the predetermined portion as the bumper support portion 7, Since the mounting portion 8 for mounting on the vehicle body side is arranged on the supporting portion 7, a vertical wall 7a is formed between the supporting portion 7 and the peripheral portion 2a thereof, and thus the surface rigidity of these portions is increased. Will increase. Therefore, when the mounting portion 8 of the bumper 2 is fixed to the vehicle body side, the mounting strength between the bumper 2 and the vehicle body side can be increased. For example, the dynamic deformation of the front bumper can be suppressed as much as possible even if the inertial force due to the vertical movement of the vehicle body during traveling or the impact force due to the collision acts on the front bumper 2.

Further, since the rigidity of the support portion 7 of the bumper and the peripheral portion 2a thereof is increased by forming a step in these portions, the structure for reinforcement is simple and there is no adverse effect such as cost increase.

Furthermore, since the front bumper 2 is fixed to the vehicle body side by the mounting portions 4 on both sides thereof and the mounting portion 8 at the central lower portion, the front bumper 2 and the vehicle body side can be mounted more firmly.

Furthermore, since the air guide port 9 of the bumper support portion 7 is formed, the traveling wind can be introduced to the engine room side, and the cooling performance can be improved. In this case, since the flange 9a is formed on the peripheral edge of the air guide port 9, it is possible to avoid the deterioration of rigidity due to the formation of the air guide port.

In the above embodiment, the vertical wall is formed by projecting the bumper support portion 7 forward, but the vertical wall may be formed by denting the bumper backward.

Further, in the above-mentioned embodiment, the mounting portions of the front bumper 2 to the vehicle body are arranged on both side portions and the lower center portion of the vehicle body. However, the mounting position of the mounting portion is not limited to this, and the bumper supporting portion is also the It may be arranged at an appropriate position depending on the arrangement position.

[Effect of device]

As described above, according to the bumper mounting structure according to the present invention, a step is formed between the predetermined surface portion of the resin bumper and the bumper base portion around the predetermined portion, and the predetermined portion serves as a bumper support portion, Since the attachment portion for attachment to the vehicle body side is formed in the support portion, a vertical wall is formed between the bumper support portion and its peripheral portion, and the surface rigidity of these portions increases. As a result, the rigidity of the entire mounting portion of the bumper to the vehicle body side can be increased, and as a result, the mounting strength of the bumper can be increased.

Further, by providing a step between the support portion of the bumper and its peripheral portion to increase the rigidity of these portions, there is an effect that the structure is simple and no adverse effects such as cost increase are brought about.

[Brief description of drawings]

1 and 2 are views for explaining a front bumper mounting structure according to an embodiment of the present invention. FIG. 1 is a partial perspective view showing a lower mounting portion of the front bumper, and FIG. ) Is an enlarged perspective view showing the side portion (A portion) of the front bumper in FIG. 1, and FIG. 2 (b) is IIb-IIb in FIG. 2 (a).
Line sectional views, FIGS. 3 to 5 are views for explaining an example of a conventional front bumper mounting structure, FIG. 3 is an external view of a general vehicle body, and FIG. 4 is a view of FIG. FIG. 5 (a) is a fourth perspective view showing an enlarged portion B of the front bumper.
The enlarged perspective view of the mounting portion (C portion) of the front bumper in the figure,
FIG. 5 (b) is a sectional view taken along the line Vb-Vb of FIG. 5 (a). In the figure, 2 is a front bumper, 2a is a bumper base, 5
Is a vehicle body side bracket, 7 is a bumper support portion, 8 is a bumper mounting portion, and 8a is a mounting surface (bottom surface of the mounting portion).

Claims (1)

[Scope of utility model registration request] 1. A bumper mounting structure in which a mounting portion for a vehicle body side is formed on a part of a resin bumper, and the mounting portion is fixed to the vehicle body side, a predetermined portion of the resin bumper surface, and a periphery of the predetermined portion. A bumper mounting structure characterized in that a step is formed between the bumper base surface and the predetermined portion as a bumper supporting portion, and the mounting portion is formed by immersing a part of the bumper supporting portion in a concave shape. .