KR20150138487A - Hybrid crash box satisfied vehicle impact characteristics - Google Patents

Abstract

The present invention relates to a hybrid crash box satisfying impact performance and, more specifically, provides a hybrid crash box satisfying impact performance, which is provided between a bumper beam and a vehicle body to absorb impact energy in case of a vehicle collision, wherein an EPP which is an impact absorbing material is embedded in an empty portion. According to the present invention, the EPP is filled in the inside of the crash box to be fixated by a long bolt, thereby more improving impact performance as an impact absorbing force by means of the EPP is added when there is deformation of the crash box in case of a collision.

Description

[0001] HYBRID CRASH BOX SATISFIED VEHICLE IMPACT CHARACTERISTICS [0002]

[0001] The present invention relates to a hybrid crash box satisfying crashworthiness, and more particularly, to a hybrid crash box which is filled with expanded polypropylene (EPP) inside the crash box, Box.

In general, a bumper system for a vehicle is designed to elastically deform at a low-speed collision of a vehicle, thereby physically damaging the vehicle. In this case, the bumper system absorbs the impact of collision with another vehicle or a fixed body, , And a shock absorber disposed at the front and rear of the vehicle so as to minimize deformation of the vehicle body at the same time.

1, the bumper system includes a bumper beam 3 basically mounted in the vehicle width direction from the front and rear of the vehicle and including two bumper rails 3a and 3b, An energy absorber 2 disposed in front of the bumper beam 3 and absorbing an impact force and a bumper cover 1 for enclosing the bumper beam 3 and the energy absorber 2, and a crash box 4 for interconnecting the side members 5.

Thus, the collision energy is absorbed as much as possible in the event of a vehicle collision, thereby minimizing the deformation of the vehicle body, thereby securing the occupant safety.

Therefore, the regulations on bumper systems are very strict, especially in the European market, the requirements are very demanding and more stringent.

For example, in an RCAR or Full Barrier Test, it is possible to absorb the maximum impact energy by compressing, deforming, or breaking within a limit that the bumper beam can withstand in the event of a collision to reduce the damage of the vehicle body, The deformation of the bumper beam must be minimized and it should not be easily broken.

In order to satisfy such a performance, the members constituting the bumper system should be optimally designed. However, the structure of the crash box 4 directly related to the impact energy absorption is very important.

Moreover, this is more so because it is necessary to satisfy the lightweighting issue of the vehicle.

Initially, the crash boxes have been formed by bending a plate material such as a 'C' shape, a 'W' shape, and the like and forming a part of the steel material as shown in Published Unexamined Utility Model Nos. 1998-036681 and 0240026 There have been efforts to increase collision absorption capacity.

However, as a basic property that a crash box should have, it is deformed at the time of collision but is not easily broken so that the collision energy is not transmitted to the bumper beam as much as possible. In some cases, however, There is a problem that collision energy is directly transmitted to the bumper beam, and on the contrary, there is a problem that it is easily broken.

SUMMARY OF THE INVENTION [0005] The present invention has been made in view of the above-described difficult and difficult conditions and phenomena, and has been developed to solve the above problems. The present invention provides a hybrid vehicle having a crash box with EPP filled therein, There is a main purpose in providing a crash box.

In order to achieve the above object, the present invention provides a crash box provided between a bumper beam and a vehicle body to absorb impact energy in the event of a vehicle collision, wherein EPP, which is a shock absorber, The collision performance of the hybrid crash box is improved.

At this time, the crash box is bolted together with the EPP by a long bolt passing through the crash box.

According to the present invention, EPP is filled in the inside of the crash box, and when the crash box is deformed by collision with the long bolt, the impact absorbing force by the EPP is added, so that the impact performance is further improved.

1 is an exemplary view showing a bumper system of a conventional vehicle.
2 is an exemplary view of a crash box according to the present invention.
3 is a partially enlarged view of a crash box according to the present invention.

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

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

2 to 3, a hybrid crash box satisfying the collision performance according to the present invention is fixed to the bumper beam 100.

That is, the crash box 200 has a rectangular box shape, is hollow and hollow, and is configured to absorb collision energy while collapsing in the event of a vehicle collision.

The crash box 200 includes an inner bracket (not shown) and an outer bracket (not shown), and is configured to be stepped according to the curvature of the attaching portion of the bumper beam 100. The inner bracket includes a pair Refers to a bracket attached to the inner surface side facing each other when the crash box 200 of the bumper beam 500 is fixed to the bumper beam 500 and the outer bracket means a bracket attached to the outer surface side of each.

Here, the present invention is configured such that EPP (Expanded Polypropylene) 300 is filled in an empty space in which the crash box 200 is empty to perform an impact absorbing function.

In this case, the EPP 300 functions as a kind of shock absorber. When the crash box 200 receives a shock due to a shock, the shock absorber 300 elastically couples the shock absorber with the shock absorber, Energy is primarily absorbed, and EPP 300 in the interior absorbs energy secondarily.

Therefore, the collision energy is reduced to a significantly reduced form before being transmitted to the vehicle body, thereby achieving the impact reduction effect.

In addition, since the EPP 300 may be fluid in the crash box 200, if the crash box 100 collapses while the crash box 100 collapses, the EPP 300 may fail to perform the function, Lt; / RTI >

The elongated bolt 400 can be used so as to maintain a more effective shock absorbing force while preventing this.

The long bolt 400 should be large enough to penetrate the crash box 200 in the thickness direction, and at least one long bolt 400 may be provided.

The long bolt 400 is fastened together with the built-in EPP 300 as well as the crash box 200 so that the built-in EPP 300 can not be released to the outside even when the crash box 200 is deformed, It is induced to perform the mitigation function properly.

As described above, the crash box 200 according to the present invention is a very simple structure. However, since the elastic cushioning material such as the EPP 300 is incorporated to provide a shock absorbing force for one or two orders, You will be able to protect your life.

100: Bumper beam 200: Crash box
300: EPP 400: long bolt

Claims (2)

Claims [1] A crash box provided between a bumper beam and a vehicle body for absorbing collision energy at the time of a vehicle collision,
And an EPP which is a shock absorber is built in an empty interior of the crash box.
The method of claim 1,
Wherein the crash box is bolted together with the EPP by a long bolt passing therethrough.

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