KR20150104900A

KR20150104900A - Aluminium crash box satisfied vehicle impact characteristics

Info

Publication number: KR20150104900A
Application number: KR1020140026842A
Authority: KR
Inventors: 임종명; 박준원
Original assignee: 한화첨단소재 주식회사
Priority date: 2014-03-07
Filing date: 2014-03-07
Publication date: 2015-09-16

Abstract

The present invention relates to an aluminum crash box satisfying impact performance. The aluminum crash box comprises: a box body; a fixed plate which is arranged on one end of the box body, and connected and fixated to a vehicle body; and an inner bracket and an outer bracket which are asymmetrically arranged individually on one side and the other side on the other end of the box body, and connected and fixated to a bumper beam. The inner bracket is installed on a side facing a pair of box bodies fixated to the bumper beam; and the outer bracket is installed on a side opposite to the inner bracket. The outer bracket is installed lower than the inner bracket. According to the present invention, a bracket made of a compressed aluminum material is additionally installed individually in an inner part, which is the inner side facing the crash box, and an outer part, which is the outer side, thus the intrusion control and deflection amount can be adjusted when a vehicle crashes. In addition, a full barrier test and an RCAR test which are particularly required from North America and the United States specifications, and the like can be all satisfied.

Description

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

The present invention relates to an aluminum crash box satisfying crashworthiness, and more particularly, it is possible to implement a bracket in an inner portion and an outer portion to adjust a deflection of a bumper beam upon collision, The present invention relates to an aluminum crash box that satisfies a collision performance that can contribute to improvement of vehicle performance by satisfying all collision performance tests.

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 RCAR or Full Barrier Test, it is possible to absorb the maximum impact energy by compression, deformation or fracture within the limit that the bumper beam can withstand in the event of a collision to reduce the damage of the car body, To avoid damage, the bumper beam must be minimized in strain and must not be broken easily.

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 The present invention has been made in view of the above-described difficult and difficult conditions and phenomena, and has been made to solve the above-mentioned problems. An object of the present invention is to provide a bumper beam- Bracket is additionally reinforced to control intrusion and deflection in the event of a vehicle collision, and satisfies improved collision performance to meet both the full-barrier test and the RCAR test, which are demanding in North American and US specifications. The present invention has been made to solve the above-mentioned problems occurring in the prior art.

The present invention is a device for achieving the above object, comprising: a box body; a fixing plate provided at one end of the box body and connected and fixed to the vehicle body; and asymmetrically provided at one end and the other end of the box body, Wherein the inner bracket is installed on the opposite side of a pair of box bodies fixed to the bumper beam; Wherein the outer bracket is installed on a side opposite to the inner bracket; And the outer bracket is installed lower than the inner bracket.

At this time, the fixing plate, the box body, the inner bracket, and the outer bracket are also made of aluminum.

In addition, the inner bracket and the outer bracket are formed in a trapezoidal shape in vertical cross section to maintain a space therein.

In addition, one or both of the inner bracket and the outer bracket are further provided with at least one rib connected in the longitudinal direction.

The inner bracket is designed such that the lower end of the outer side of the outer bracket is located above the upper end of the outer side of the outer bracket.

Further, the inner bracket is designed such that the lower end of the outer side of the outer bracket is located below the upper end of the outer side of the outer bracket.

The inner bracket is designed so that the lower end of the outer cross section of the inner bracket coincides with the upper end of the outer cross section of the outer bracket.

According to the present invention, the extruded aluminum bracket is further reinforced to the inner portion, which is the inner face of the crash box, and the outer portion, which is the outer portion of the crash box, so that the intrusion can be controlled, Full Barrier Testing, RCAR Testing, etc., which are demanding in North American and US specifications, can be achieved.

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 an exemplary front view of a crash box according to the present invention.
4 is an exemplary view showing an example of installation of a crash box according to the present invention.
5 is an exemplary view showing an example of a collision test when a conventional crash box is mounted.
6 is a view illustrating an example of collision test when a crash box is mounted 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 4, an aluminum crash box satisfying the collision performance according to the present invention includes a fixing plate 100, a box body 200, an inner bracket 300, and an outer bracket 400, do.

At this time, all of these components are formed of an aluminum material. Aluminum is lightweight, excellent in tensile strength and durability, and is excellent in absorbing and transmitting collision energy during impact.

The fixing bracket 300 and the outer bracket 400 may be fixed to the bumper beam 500. The fixing bracket 300 may be fixed to the bumper beam 500. [

In this case, the fixing plate 100 is a plate-like member and is bolted to the vehicle body through the bolt hole 110, so that the fixing plate 100 can maintain a stable fixing property.

In addition, the box body 200 is a box-shaped box-shaped body and hollowed inside and is configured to be crushed when impacted.

The inner bracket 300 and the outer bracket 400 are configured to be stepped on the basis of the curvature of the attaching portion of the bumper beam 500. The inner bracket 300 is configured such that a pair of crash boxes are mounted on the bumper beam 500 And the outer bracket 400 refers to a bracket that is attached to the outer surface of each of the outer brackets.

At this time, the inner bracket 300 and the outer bracket 400 are welded to both sides of the box body 200, respectively.

Herein, the inner bracket 300 and the outer bracket 400 have a trapezoidal shape in their longitudinal section, thereby maintaining a space in the inner bracket 300 and the outer bracket 400, respectively. This is to minimize collision energy transfer to the vehicle body by increasing the absorbing force while inducing the collision strain.

Particularly, the outer bracket 400 is configured to have a larger width and size than the inner bracket 300 because when the impact energy is spread to both ends of the bumper beam 500 during the full barrier test, And at the same time, it provides a deformation suppressing force and acts to reduce rupture or crushing, thereby reducing an intrusion amount, that is, intrusion.

Such a penetration amount can be adjusted by making the widths W1 and W2 of the inner bracket 300 and the outer bracket 400 wide or narrow.

In addition, the deflection can be adjusted by adjusting the cross-sectional widths W1 and W2 and adjusting the position of the cross-sectional width W1 of the inner bracket 300. [

That is, if the width W1 of the outer bracket 300 is narrow and the lower end of the outer section of the inner bracket 300 is located above the upper end of the outer section of the outer bracket 400, the intrusion and deflection become large. The lower end of the outer section of the inner bracket 300 is located below the upper end of the outer section of the outer bracket 400, so that the intrusion and the deflection are reduced.

The most desirable design is that the lower end of the outer section of the inner bracket 300 is designed to coincide with the upper end of the outer section of the outer bracket 400, It is possible to keep the collection.

In addition, when locally intrusions and deflation adjustments are required, the inner bracket 300 or the outer bracket 400 may be provided with at least one rib 600 in the longitudinal direction, for example, to satisfy conditions such as an offset test. .

Further, the addition of the ribs 600 also helps to improve the rigidity, which is also connected with the impact energy absorbing and deformation absorbing at the time of impact, and the body damage preventing function.

It can be seen that the present invention having such a configuration is clearly distinguished from the effect as clearly contrasted with FIG. 5 and FIG.

That is, in the case of the conventional crash box without the bracket structure according to the present invention, as shown in FIG. 5, the full penetration test results show that the maximum intrusion reaches 141 mm and the maximum deflection reaches 120 mm have.

However, in the case of the crash box to which the bracket structure according to the present invention is applied, it is understood that the maximum penetration amount is 129 mm, which is about 9% lower than the conventional one.

This means that it is possible to reduce the amount of intrusion of the collision object in the event of a vehicle collision, thereby reducing vehicle damage or human accidents.

In addition, the maximum deflection is 107 mm, which is about 11% lower than the conventional one, which means that the refraction deformation is reduced correspondingly, so that it is possible to prevent damage to the vehicle body or human accidents.

As described above, according to the present invention, the inner bracket and the outer bracket are separated from each other as a new concept that can not be easily conceived in the conventional structure, but they are implemented asymmetrically so that the penetration amount and the deflection reduction effect It is possible to improve the safety of the vehicle.

100: fixed plate 200: box body
300: Inner bracket 400: Outer bracket
500: bumper beam 600: rib

Claims

A box body, a fixing plate provided at one end of the box body and fixedly connected to the vehicle body, and an inner bracket and an outer bracket that are asymmetrically provided on one side and the other side of the box body, respectively,
Wherein the inner bracket is installed on a side surface of a pair of box bodies fixed to the bumper beam;
Wherein the outer bracket is installed on a side opposite to the inner bracket;
Wherein the outer bracket is lower than the inner bracket.

The method of claim 1,
Wherein the fixing plate, the box body, the inner bracket, and the outer bracket are made of aluminum.

The method of claim 1,
Wherein the inner bracket and the outer bracket are formed in a trapezoidal shape in longitudinal section to maintain a space therein.

The method of claim 1,
Wherein one or both of the inner bracket and the outer bracket are further provided with at least one rib connected in the longitudinal direction.

The method of claim 1,
Wherein the inner bracket is designed such that the lower end of its outer section is higher than the upper end of the outer section of the outer bracket.

The method of claim 1,
Wherein the inner bracket is designed such that the lower end of the outer side of the outer bracket is lower than the upper end of the outer side of the outer bracket.

The method of claim 1,
Wherein the inner bracket is designed such that the lower end of the outer cross section of the inner bracket coincides with the upper end of the outer cross section of the outer bracket.