KR101057985B1

KR101057985B1 - Bumper Unit for Vehicle

Info

Publication number: KR101057985B1
Application number: KR20100008653A
Authority: KR
Inventors: 구도회; 최석준
Original assignee: 주식회사 성우하이텍
Priority date: 2010-01-29
Filing date: 2010-01-29
Publication date: 2011-08-19
Also published as: KR20110088920A

Abstract

The present invention consists of a shock absorber composed of a bumper cover and a bumper beam made of a steel plate of a thin steel plate instead of the solid foam of the conventional EPP material, the impact by optimizing its shape, thickness and hole size Provided is a bumper unit for a vehicle to increase absorption performance.

Description

Bumper Unit for Vehicles {A BUMPER UNIT FOR VEHICLES}

The present invention relates to a bumper unit for a vehicle, and more particularly, a shock absorbing material formed between a bumper cover and a bumper beam is made of a thin steel sheet, and the shape, thickness, and hole size are optimized and applied to thereby improve impact absorption performance. It relates to a vehicle bumper unit to be raised.

In general, a bumper unit in a vehicle is a shock absorber that is configured in front and rear of a vehicle so that the vehicle absorbs the impact when the vehicle collides with another vehicle or a fixed body to promote passenger safety and at the same time minimize the deformation of the vehicle body. .

As shown in FIG. 1, the bumper unit 100 includes a bumper beam 101 disposed in the vehicle width direction from the front and rear of the vehicle, and is mounted to the vehicle body side member 111 through both stays 103. In front of the bumper beam 101, a shock absorber 107 is formed to absorb impact force. The bumper beam 101 and the shock absorber 107 are covered by a bumper cover 109.

In the above description, the shock absorber 107 is also referred to as an energy absorber and is covered by the bumper cover 109 in a state in which it is attached to correspond to the front surface of the bumper beam 101 as shown in FIGS. 2 and 3. It is installed as it is.

By the way, the above shock absorber 107 is usually used EPP (Expanded Polypropylene) material, the impact absorber of the EPP material is applied to the solid foam (Solid) foam that can be deformed, when the collision with the pedestrian, As shown in Fig. 3, after absorbing a certain amount of collision energy (E), there is a deformation limit (L) that can no longer absorb the collision energy (E), so that the body of the pedestrian directly impacts the bumper beam (101). There is a disadvantage in that it acts as if to increase the injury of pedestrians.

Therefore, the present invention was invented to solve the above-mentioned disadvantages, and the problem to be solved by the present invention is to replace the shock absorber formed between the bumper cover and the bumper beam as a steel plate of thin plate instead of the solid foam of the conventional EPP material. The present invention provides a bumper unit for a vehicle, which is configured of an impact absorbing plate made of, and optimizes and applies its shape, thickness, and hole size.

In the vehicle bumper unit of the present invention for realizing the technical problem as described above, the bumper beam disposed in the vehicle width direction from the front and rear of the vehicle is mounted to the side body member through both sides stays, the impact force in front of the bumper beam In the bumper unit is configured to absorb a shock absorber, and the bumper beam and the shock absorber is covered by a bumper cover,

The shock absorber is composed of a shock absorbing plate made of a 'c' shaped steel plate material, the shock absorbing plate is characterized in that each end is joined to the upper and lower surfaces of the bumper beam in front of the bumper beam.

The thickness of the shock absorbing plate is preferably smaller than the thickness of the bumper beam.

The shock absorbing plate is characterized in that it has a plurality of through holes on its cross section.

The hole is a rectangular hole, characterized in that formed on the cross section of the shock absorbing plate at a predetermined interval along the longitudinal direction.

The shock absorbing plate is characterized in that each end is joined to the upper and lower surfaces of the bumper beam by spot welding, respectively.

As described above, according to the bumper unit for a vehicle according to the present invention, the shock absorber formed between the bumper cover and the bumper beam is composed of a shock absorber consisting of a thin steel plate instead of the solid foam of the conventional EPP material, By optimizing and applying the shape, thickness and hole size, there is an effect of increasing the collision absorption performance.

That is, the above shock absorbing plate is no longer applied to the impact energy (E) after the solid foam made of expanded polypropylene (EPP), which has been applied as a conventional shock absorber, absorbs a certain amount of collision energy (E). By maximizing the deformation limit (L) that can not be absorbed to slow down the point of impact of the pedestrian's body to the bumper beam (1) or to absorb more impact energy (E) to reduce the injury of the pedestrian.

1 is an exploded perspective view of a general vehicle bumper unit.
2 is an exploded perspective view of a bumper beam and a shock absorber applied to a vehicle bumper unit according to the related art.
3 is an assembled cross-sectional view of the bumper beam and the shock absorber according to the prior art.
4 is an assembled perspective view of a bumper beam and an impact absorbing material applied to a vehicle bumper unit according to an exemplary embodiment of the present invention.
5 is an exploded perspective view of a bumper beam and a shock absorber applied to a vehicle bumper unit according to an exemplary embodiment of the present invention.
6 is an assembled cross-sectional view of a bumper beam and an impact absorbing material applied to a vehicle bumper unit according to an exemplary embodiment of the present invention.
7 is a conceptual diagram of the impact deformation of the shock absorber applied to the vehicle bumper unit according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail as follows.

In the vehicle bumper unit according to the present embodiment, as illustrated in FIGS. 4, 5, and 6, the bumper beams 1 arranged in the vehicle width direction from the front and rear of the vehicle are provided on both sides of the vehicle body through both side stays 3. The shock absorbing plate 5 is mounted on a side member (not shown), and the shock absorbing plate 5 is formed as a shock absorbing material absorbing the impact force in front of the bumper beam 1, and the bumper beam 1 and the shock absorbing plate 5 are formed. A bumper cover (not shown) is formed at the front side.

Here, the shock absorbing plate 5 according to the present embodiment is made of a 'c' shaped steel plate material and each end of the bumper beam 1 is joined to the upper and lower surfaces of the bumper beam 1. .

That is, it is preferable that each end of the shock absorbing plate 5 is joined to the upper and lower surfaces of the bumper beam 1 by spot welding W, respectively.

On the other hand, the thickness t1 of the shock absorbing plate 5 is designed to be smaller than the thickness t2 of the bumper beam 1 to transfer the collision energy E transmitted from the front to the bumper beam 1. It is desirable to be absorbed and deformed first in itself.

The shock absorbing plate (5) forms a plurality of through holes (H) on its cross section, and the hole (H) is preferably formed of a square hole (H), the shock absorbing plate (5) It is preferable that the front surface F3 and the upper and lower surfaces F1 and F2 of the cross section are formed at regular intervals along their longitudinal directions, respectively.

Therefore, the vehicle bumper unit having the above configuration has a plurality of holes (H) as a steel plate of thin plate instead of the solid foam of the conventional EPP material, the shock absorber formed between the bumper cover (not shown) and the bumper beam 1. The shock absorbing plate (5) is formed of the '?' Shape to maximize the deformation limit (L), thereby increasing the impact absorption performance.

That is, as shown in Figure 7, the vehicle bumper unit of the present embodiment, in the process of absorbing the collision energy (E) during the collision with the pedestrian, the upper surface (F1) and the lower surface (F2) of the shock absorbing plate (5) This fully folded and absorbs the collision energy (E) through its deformation until the front surface (F3) completely touches the front surface (F) of the bumper beam (1), the deformation of the shock absorbing plate 5 at this time The limit L extends to the point at which the front face F3 touches the front face F of the bumper beam 1, which slows down the time at which the pedestrian's body collides with the bumper beam 1 or has more collisions. There is an advantage to be made after absorbing the energy (E).

1: bumper beam 3: stay
5: shock absorber H: hole

Claims

Bumper beams disposed in the vehicle width direction from the front and rear of the vehicle are mounted to the side body member through both side stays, and a shock absorber for absorbing impact force is formed in front of the bumper beam, and the bumper beam and the shock absorber are bumpers. In the bumper unit for a vehicle covered with a cover,
The shock absorber is
A bumper unit for a vehicle, comprising: a shock absorbing plate made of a 'c' shaped steel plate material, wherein the shock absorbing plate is joined to an upper surface and a lower surface of the bumper beam in front of the bumper beam.

In claim 1,
The thickness of the shock absorbing plate is
Bumper unit for the vehicle, characterized in that less than the thickness of the bumper beam.

In claim 1,
The shock absorbing plate is
A bumper unit for a vehicle, characterized in that it has a plurality of through holes on its cross section.

4. The method of claim 3,
The hole is
A bumper unit for a vehicle, characterized in that formed in the rectangular hole at a predetermined interval along the longitudinal direction on the cross section of the shock absorbing plate.

In claim 1,
The shock absorbing plate is
A bumper unit for a vehicle, wherein each end is joined to the upper and lower surfaces of the bumper beam by spot welding, respectively.