KR20070080911A - Structure of bumper for vehicle - Google Patents

Abstract

A shock absorbing bumper structure for a vehicle is provided to simplify the structure for supporting or fixing a foam, and to improve shock absorbing property and corrosion resistance of the foam. A shock absorbing bumper structure for a vehicle includes a bumper beam(10), an aluminum foam(20), and a bracket(30). The bumper beam is mounted in a vehicle bumper, and has a length equal to the vehicle width. The aluminum foam is arranged on the outer side of the bumper beam. The bracket covers the bumper beam and the foam, and has an inner surface with a flange(31) having a bolt hole(32). The bumper beam and the foam are coupled with each other through convex-concave structures thereof.

Description

Bumper structure for shock absorption {STRUCTURE OF BUMPER FOR VEHICLE}

1 is an exploded perspective view of a bumper structure according to an embodiment of the present invention.

Figure 2 is a perspective view showing the assembled state of the bumper structure according to an embodiment of the present invention.

3 is a cross-sectional view of the bumper structure according to the embodiment of the present invention.

4 is a cross-sectional view showing an installation state of a bumper structure according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: bumper beam 11: groove

20: metal foam 21: protrusion

30: bracket 31: flange

32: bolt hole

The present invention is built into a bumper installed in the front and rear of the vehicle, while having a buffering effect, while improving the assembly and workability and lowering the cost of parts, bumper beam having a longitudinal groove on one side and the groove of the groove The present invention relates to a shock absorbing bumper structure consisting of an aluminum foam having a “T” shape to be inserted at an optional position, and a bracket which is fixed to the vehicle body by a flange formed at the rear while preventing the aluminum foam from being separated from the bumper beam.

A conventional vehicle bumper is used as a shock absorber to minimize the impact on the occupant by absorbing physical force from the outside of the vehicle, and its structure includes a bumper beam mounted in the vehicle width direction through a body stay configured at the front and rear of the vehicle. The shock absorbing member may be disposed on an outer surface of the bumper beam, and a bumper cover may cover the outside of the bumper beam and the shock absorbing member.

Such a bumper requires a shock absorbing condition and a certain amount of rigidity for maintaining the vehicle body. In addition, in recent years, a lightweight material is preferred for improving fuel efficiency of a vehicle. As a raw material to be mentioned, an aluminum foam foamed using aluminum is mentioned.

However, the conventional bumper structure using aluminum foam has a complicated structure for supporting or fixing the foam, not only good assemblability, but also a lot of material cost is required to deteriorate the structure.

Accordingly, the present invention is to apply the aluminum foam to the vehicle bumper that can satisfy the light weight of the vehicle and high shock absorption and stiffness at the same time as described above, by simplifying the structure to improve the assembly and productivity, and also to increase the cost of parts The purpose is to provide a shock absorbing bumper structure that can be reduced.

The present invention for achieving the above object is a bumper beam formed with a longitudinal groove on one side, an aluminum foam in the form of a "T" to be inserted in the optional position of the groove, and the aluminum foam so as not to be separated from the bumper beam At the same time it is characterized by consisting of a bracket fixed to the vehicle body by a flange formed on the rear.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In the following description, the descriptions of the 'outer surface' and 'inner surface' refer to the outer and inner surfaces of the vehicle center. Will be described.

1 is an exploded perspective view of a bumper structure according to an embodiment of the present invention.

Referring to FIG. 1, the bumper beam 10 is mounted in the vehicle width direction to form a skeleton of the bumper, and the groove 11 in the longitudinal direction is provided on an outer surface thereof to have a cross-section of the letter “c”.

The foam 20 mounted on the outer surface of the bumper beam 10 is provided with a protrusion 21 inserted into the groove 11 on the inner surface thereof integrally, and its cross section is in the form of a “T” shape. It is selectively installed at the center, left and right ends with respect to the length of the bumper beam 10.

The foam 20 is foamed using a metal material, preferably aluminum, and is prepared by mixing, stirring, foaming, and curing various additives including a blowing agent after dissolving aluminum. It is produced so that it is lightweight and has excellent conditions for shock absorption, sound absorption and corrosion resistance.

On the other hand, the bracket 30 is formed when the foam 20 is inserted into the bumper beam 10 to surround the outer surface in order to maintain their mutually coupled state, the rear surface of the bracket 30 bolt holes A flange 31 having a 32 is provided, and the flange 31 is mounted on a vehicle body stay (not shown), and is fixed to the stay by means of fastening means such as a bolt using the bolt holes 32.

2 is a perspective view showing the assembled state of the bumper structure according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the bumper structure according to an embodiment of the present invention, the bumper beam 10 described above with reference to FIGS. , The mutual coupling structure of the foam 20 and the bracket 30 can be specifically confirmed.

As shown in the drawing, the assembly sequence is first inserted into the center of the bumper beam 10, both left and right ends selectively, and then the bracket 30 is adjusted to the position of the foam 20. The foam 20 is fixed so as not to be separated from the bumper beam 10, and then fixed to the vehicle body through a flange 31 located at the rear surface of the bracket 30.

As described above, the foam 20 may be installed only at the center of the bumper beam 10 or only at both ends of the left and right sides, and may be simultaneously applied to both the center and the left and right ends as shown.

4 is a cross-sectional view illustrating an installation state of a bumper structure according to an exemplary embodiment of the present invention.

Referring to FIG. 4, a bumper cover 50 constituting a bumper may be provided on an outer surface of the bracket 30, and the shock absorbing member may be provided between the bumper cover 50 and the bracket 30 as shown in FIG. 4. 40 may be further provided.

The shock absorbing member 40 may take a conventional synthetic resin foam, more specifically, a urethane foam, and the bumper configured as described above absorbs the primary shock by elasticity of the shock absorbing member 40 and is made of aluminum. The foam 20 is able to absorb the impact while folded during the secondary impact to constitute a better shock absorbing structure.

Although the above description has been illustrated and described only with respect to preferred embodiments of the present invention, it is not limited only to the examples, and it is obvious that a combination of many functions and optional additions of the present invention described above can be changed.

For example, when the bumper beam 10 and the foam 20 are combined with each other in the form of irregularities, the position of the irregularities may be changed, such as in the utility model registration claims of the present invention described below. Those skilled in the art to which the present invention pertains can understand that various modifications can be made without departing from the technical spirit provided by the present invention.

According to the bumper structure for shock absorption according to the present invention as described above, while the lightweight and high impact absorbency and rigidity can be obtained simultaneously with the use of aluminum foam, the structure is simple and the material cost is reduced, and assembling is easy to assemble This is a very useful invention that can increase productivity and competitiveness.

Claims (4)

A bracket having a bumper beam mounted inside a bumper of a vehicle having a vehicle width length, an aluminum foam mounted on an outer surface of the bumper beam, and a flange having a bolt hole on the inner surface of the bumper beam and the outer surface of the foam. Shock-absorbing bumper structure, characterized in that the structure made. The method according to claim 1, The bumper beam and the foam is a shock-absorbing bumper structure, characterized in that coupled to each other uneven (凹凸) shape. The method according to claim 1 or 2, The foam is a shock-absorbing bumper structure, characterized in that located at least one or more selected from the center, left / right end with respect to the length of the bumper beam. The method according to any one of claims 1 to 3, Bumper cover is disposed on the outside of the bracket, the bumper structure characterized in that the shock absorbing member is interposed between the bracket and the bumper cover.

Images