KR101061380B1 - Car Bumper Stai - Google Patents

Abstract

The present invention is fixed to the bumper beam of the stair box which is opened in front and forms a plurality of notches on both sides, and by inserting the reinforcement box through the front opening of the stair box from the front of the bumper beam, In the case of an offset collision, the reinforcement box absorbs the collision energy over three orders while maintaining the directionality of the collision deformation together with the station box, thereby providing a vehicle bumper stage exhibiting stable collision absorption performance.

Bumper, Stai, Stai Box, Reinforcement Box, Notch

Description

Bumper stay for car {BUMPER STAY IN AUTOMOTIVE BUMPER SYSTEM}

The present invention relates to a vehicle bumper stage, and more particularly, to a vehicle bumper, which is connected between a bumper beam and a front side member or a rear side member and absorbs collision energy input from the front or the rear over three times to the vehicle body. A bumper stage for a vehicle that allows a minimum amount of collision energy to be input.

In general, a bumper in a vehicle absorbs an impact when a vehicle collides with another vehicle or a fixed body to promote the safety of the occupant, and at the same time, a predetermined portion of the front and rear ends of the vehicle can be minimized to minimize deformation of the vehicle body. The buffer unit is arranged.

As illustrated in FIG. 1, the bumper 100 is provided with a stair 103 at both rear sides of the bumper beam 101 disposed in the vehicle width direction from the front and the rear of the vehicle, thereby fixing the crash box 111 or the like. A bumper beam unit 105 fixed to the vehicle side side member 113, an energy absorber 107 disposed in front of the bumper beam 101 to absorb impact force, and the bumper beam 101 and energy absorber It consists of a bumper cover 109 surrounding 107.

In the conventional bumper beam unit 105, the stage 103 is welded or bolted to both sides of the rear of the bumper beam 101 in front of the bumper beam 101, the rear of each of the crash box 111 or side member 113 ) Is assembled and installed right away.

However, the conventional stair 103 as described above has recently been developed in the development process for safety and light weight of the bumper, in terms of absorbing collision energy so as to minimize damage to the vehicle structure while absorbing shock during a low-speed offset collision. It is good, but in the case of an offset collision of medium speed or more, it is manufactured in a simple box shape, and implies a problem of low impact absorption performance by transferring the impact force to the vehicle body in addition to the absorption of collision energy by self deformation.

Therefore, the present invention has been developed to meet the recent development trend of the bumper, and has been invented to solve the problems as described above. The object of the present invention is to open a front box and form a plurality of notches on both sides of the bumper beam. By fixing and inserting and fixing the reinforcement box from the front of the bumper beam through the front opening of the stator box, in case of an offset collision of medium speed or more, the reinforcement box collides with the stair box while maintaining the directionality of the collision deformation. By absorbing energy over three orders, a bumper stage for a vehicle exhibiting stable crash absorption performance is provided.

In the vehicle bumper stage of the present invention for realizing the above object, in the vehicle bumper stage connecting the vehicle body and the bumper beam,

It is formed of a square tube and the front is opened, and a plurality of first notches are formed on both sides thereof, and the front ends thereof are fixed by welding through both sides of the bumper beam, and the rear ends thereof are connected through the flange. A stay box assembled with the vehicle body side member; It is formed of a rectangular tube member on both sides formed a plurality of second notches in the longitudinal direction, characterized in that consisting of a reinforcement box is fixed in the state inserted through the front opening of the box.

The staging box is characterized in that the same number of first notches are formed at mutually corresponding positions on both sides thereof.

The first notch is characterized in that the inner end portion protruding into the staple box is formed in a round shape.

The reinforcement box is characterized in that both ends of the front is formed to extend to form a support plate each bent inward.

The reinforcement box is characterized in that its rear end is fitted and fixed by interference fit through the front opening of the stair box.

The second notch is characterized in that the inner end portion protruding into the reinforcement box is formed in a round shape.

The first notch may be formed to have the same size as the second notch.

As described above, according to the bumper stent for a vehicle according to the present invention, the stator box is fixed to the bumper beam, the front of which is opened and forms a plurality of notches on both sides thereof, Inserting and fixing the reinforcement box through the front opening, in case of offset collision over medium speed, the reinforcement box absorbs the collision energy three times while maintaining the directionality of the collision deformation along with the station box, indicating stable collision absorption performance. There is a filial piety.

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

2 is a perspective view of a bumper beam unit equipped with a vehicle bumper stage according to an exemplary embodiment of the present invention, and FIGS. 3 and 4 are perspective views and cross-sectional views of a bumper stage for a vehicle according to an exemplary embodiment of the present invention.

As shown in FIG. 2, the vehicle bumper stage 1 according to the present embodiment is for connecting the bumper beam 3 and the side members 5 of the vehicle body, as shown in FIGS. 3 and 4. Likewise, it is basically composed of a stair box 11 and a reinforcement box 13.

The staging box 11 is formed of a rectangular tube member, and the front side thereof is opened.

Three first notches N1 are formed on both sides of the staging box 11 along the longitudinal direction thereof, and the front ends thereof penetrate both sides of the bumper beams 3 from the rear to the front. It is welded to the bumper beam 3 along its front tip circumference.

The rear end of the staging box 11 is integrally formed with the flange 15 and assembled to the vehicle body side side member 5.

Each of the stair boxes 11 is formed with three first notches N1 at positions corresponding to both sides thereof, and each of the first notches N1 protrudes into the stair box 11. The inner end portion R1 is formed in a round shape.

In addition, the reinforcement box 13 is formed of a rectangular tube material, and on both sides, two second notches N2 are formed on the outer side along the longitudinal direction thereof, and three second notches N2 are formed on the inner side.

The reinforcement box 13 is formed in a smaller size than the staging box 11 so as to be inserted into the staging box 11, and the rear end portion thereof is inserted through the front opening of the staging box 11. It is fixed to the station box 11.

At this time, it is preferable that the rear end portion of the reinforcement box 13 is fitted and fixed by interference fit through the front opening of the stair box 11.

In addition, the reinforcement box 13 is formed by forming the support plate 17 bent inward to both sides end of the front is formed extending.

In addition, the second notch N2 may preferably have an inner end portion R2 protruding into the reinforcement box 13 in a round shape.

In this case, the second notch N2 is preferably formed to have the same size as the first notch N1.

Therefore, the collision energy absorption pattern of the vehicle bumper stage 1 having the above-described configuration will be described in comparison with the collision energy absorption pattern of the bumper stage 103 of the prior art through FIG. 5.

First, Figure 5 is a deformation state during the 40% offset collision test for the bumper unit equipped with the bumper stage of the present invention and the prior art, the analysis weight was 1,200Kg under the test conditions at this time.

That is, the bumper stage 103 of the prior art starts to collapse from the beginning of the transfer of the offset collision energy (F) from the front to collapse to the final side member 113.

On the other hand, in the vehicle bumper stage 1 according to the present embodiment, the offset collision energy F transmitted from the front acts first on the reinforcement box 13 and then acts on the bumper beam 3. That is, the bumper stage 1 may be partially divided by the offset collision energy F of the reinforcement box 13, the partial region of the stair box 11, and the stair box 11 and the reinforcement box 13. Although the overlap section of is collapsed sequentially over three orders, the final side member 5 does not collapse.

That is, as shown in FIG. 6, as the reinforcement box 13 collapses from the front for a certain period D1, about 5% of the total collision energy is absorbed by the primary shock absorption, and in this case, the total collision energy in the bumper beam. About 4% of the energy is absorbed, absorbing a total of 9% impact energy.

Subsequently, about 76% of the total collision energy is absorbed by the secondary shock absorption while the stair box 11 collapses for a certain period D2.

As described above, after the collision absorption in the first and second stages is advanced due to the collapse of the reinforcement box 13 and the stair box 11 itself, the overlap section D3 of the stair box 11 and the reinforcement box 13 is performed. ) Collapses, absorbing about 15% of the total impact energy by tertiary impact absorption.

As a result, the vehicle bumper stage 1 of the present invention shows a collision analysis result as shown in FIG. 7, and the impacts of the reinforcement box 13 and the stair box 11 over the first, second, and third orders are as follows. The absorption operation shows an energy absorption rate that absorbs the total impact energy of 10.94 KJ. The reaction force value is 48.02 KN, and the deformation amount is 128.62 mm.

In contrast, the bumper stage 103 of the prior art exhibits an energy absorption rate of absorbing 10.72 KJ of total collision energy, and the reaction force value is 39.68 KN, and the deformation amount is 190.73 mm.

As in the result of the collision analysis, the smaller the deformation amount, the higher the energy absorption rate and the reaction force value, the better the performance. Thus, the bumper stage 1 of the present invention has a higher impact energy than the bumper stage 103 of the prior art. It can be seen that the collision absorption performance is better by absorbing and buffering the reduced and delivered to the side member side.

1 is an exploded perspective view of a general vehicle bumper system.

2 is a perspective view of a bumper beam unit equipped with a vehicle bumper stage according to an exemplary embodiment of the present invention.

3 is a perspective view of a bumper stage for a vehicle according to an exemplary embodiment of the present invention.

4 is a cross-sectional view of a vehicle bumper stage according to an embodiment of the present invention.

5 is a deformation state diagram during a 40% offset collision test for the bumper unit equipped with the bumper stage of the present invention and the prior art.

FIG. 6 is a plan view of a buffer stage illustrating an absorption pattern of collision energy of a vehicle bumper stage according to an exemplary embodiment of the present invention. FIG.

7 is a collision analysis result table during a 40% offset collision test for the bumper unit equipped with the bumper stage of the present invention and the prior art.

Claims (7)

In the vehicle bumper stage connecting the vehicle body and the bumper beam, It is formed of a square tube and the front is opened, and a plurality of first notches are formed on both sides thereof, and the front ends thereof are fixed by welding through both sides of the bumper beam, and the rear ends thereof are connected through the flange. A stay box assembled with the vehicle body side member; A bumper staple for a vehicle, comprising: a reinforcement box formed of a rectangular tube member and having a plurality of second notches formed on both sides thereof in a longitudinal direction, the reinforcement box being fixed while being inserted through a front opening of the stair box. In claim 1, The stai box is A bumper seat for a vehicle, characterized in that the same number of first notches are formed at mutually corresponding positions on both side surfaces thereof. The method of claim 1 or 2, The first notch Bumper seat for a vehicle, characterized in that the inner end protruding into the box is formed in a round shape. In claim 1, The reinforcement box is Both front end ends thereof are extended to form a support plate bent inward, respectively. In claim 1, The reinforcement box is The rear end of the bumper seat for a vehicle, characterized in that the clamp is fitted through the front opening of the stair box. In claim 1, The second notch Bumper seat for a vehicle, characterized in that the inner end protruding into the reinforcement box is formed in a round shape. In claim 1, The first notch Bumper seat for the vehicle, characterized in that the same size as the second notch.

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