JP2010195228A - Shock reducing bumper device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock reducing bumper device for a vehicle constituted to obtain equal shock absorbing amount, even if impacters such as leg parts of a pedestrian, etc. always collide with any portion without shock position dependency in an energy absorber and to repair the vehicle by replacing only the energy absorber crushed by receiving shock to reduce repairing cost. <P>SOLUTION: This energy absorber 7 comprises a shock absorbing part 7a bending and forming a plate into a substantially U-shaped cross section and extending the plate in the right and left direction of a vehicle body 1 and a mounting flange part 7b extended and formed toward the vertical direction of the vehicle body 1 at each upper and lower end part of the shock absorbing part 7a. The mounting flange part 7b is mounted on a front surface side part opposed to a front side of the vehicle body 1 in a bumper reinforce 4 by using a clip or a bolt 8 and a nut 9 as fastening tools. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle impact reduction bumper device that is configured by connecting a bumper reinforcement to a vehicle body side member of an automobile via a bumper stay and mounting an energy absorber on the bumper reinforcement.

  Examples of this type of conventional technique include those described in Patent Document 1 and Patent Document 2.

  First, in the vehicle impact reduction bumper device described in Patent Document 1, both end portions of a pedestrian safety plate (energy absorber) formed in a substantially U shape in a side view are connected to a vehicle frame rail (vehicle body side member) with side brackets ( Bumper beams (bumper reinforcements) installed via bumper stays are mounted on the upper and lower surfaces by welding.

  The vehicle front bumper structure (vehicle impact reduction bumper device) described in Patent Document 2 is provided with a main bumper (bumper reinforcement) and an auxiliary bumper (energy absorber) at the front lower part of the main bumper at the front of the vehicle body. The auxiliary bumper is provided with an absorber formed by bending a plate material on the front side of the main body member extending in the vehicle width direction, and both ends of the absorber are welded to the upper and lower surfaces of the main body member. Are connected by

  In order to further clarify the conventional technique, the schematic configuration will be further described with reference to FIG.

  That is, in FIG. 9, the energy absorber a formed in a cross section, for example, a substantially U shape with a step, is configured such that both ends thereof are attached to the upper and lower surfaces of the bumper reinforcement b by welding.

  In such a configuration, as shown in FIG. 10, for example, when an impactor c such as a pedestrian's leg collides, the stepped substantially U-shaped portion is crushed to absorb the impact of the impactor c, The impactor c will be protected.

JP 2003-285704 A JP 2007-131150 A JP 2008-265738 A

  According to such a conventional technique, since both ends of the energy absorber a are mounted on the upper and lower surfaces of the bumper reinforcement b by welding, the impactor c such as a pedestrian's leg is attached to the energy absorber a. When the impact force is inputted by impact, the impact force is directly transmitted to the welded portion on the upper and lower surfaces of the bumper reinforcement b, and a large load is applied to the welded portion.

  Therefore, welding of the energy absorber a to the bumper reinforcement b is performed by a welding method exhibiting a high joint structure such as spot welding, for example, but the welded portion formed by spot welding or the like is intermittently intermittent. Since welding is performed, a difference in energy absorption at the time of collision tends to occur between a welded part and a non-welded part.

  As a result, as shown in FIG. 11, when the impactor c hits the welded part to the bumper reinforcement b in the energy absorber a (x) and hits the non-welded part (y), A difference in reaction force (shock absorption amount) to the bumper reinforcement b with respect to the deformation stroke of the energy absorber a is generated, and the dependency of the shock absorption position is likely to occur.

  In addition, when the energy absorber a is attached to the bumper reinforcement b by welding, even if only the energy absorber a is impacted and crushed, the entire system including the bumper reinforcement b must be replaced. Will increase.

  In addition, in the above, the metal energy absorber for vehicles described in the patent document 3 described in addition to the patent documents 1 and 2 is known, and the metal energy absorber for vehicles is formed in a substantially hat-shaped cross section. The upper and lower webs have a plurality of concave or convex beads in the vehicle front-rear direction, and the upper and lower flanges are bent at the ends of the upper and lower webs, respectively. It is said that it is provided between the bumper fascia arranged on the front surface and the rain force arranged on the rear surface. Is not disclosed at all, and thus does not suggest that the technical problems of the conventional techniques should be solved.

  In view of this, the present invention firstly has an energy absorber that has no impact position dependency, so that even if an impactor such as a leg of a pedestrian or the like always comes into contact with any part, an equal amount of shock absorption can be obtained. An object of the present invention is to provide an impact reduction bumper device for a vehicle.

  Secondly, the present invention provides a vehicle impact reduction bumper device that enables repair by replacing only the energy absorber when the energy absorber is crushed by impact and reduces the repair cost. It is intended to provide.

  A vehicle impact reduction bumper device according to the present invention includes at least a pair of vehicle body side members extending in the longitudinal direction of the vehicle body, bumper stays installed on the respective side members, and bumper rain connected to the bumper stays. In a vehicle impact reduction bumper device configured to include a force and an energy absorber attached to the bumper reinforcement, the energy absorber folds a plate material into a substantially U-shaped cross section and A shock absorbing portion extending in the left-right direction; and a mounting flange portion projecting from the upper and lower ends of the shock absorbing portion toward the vehicle body in the vertical direction. It is mounted on the front side facing the front side of the vehicle body in the reinforcement.

  According to the present invention having such a configuration, the energy absorber is formed by projecting a mounting flange portion at each of the upper and lower ends of the shock absorbing portion formed by bending the plate material into a substantially U-shaped cross section, and the mounting flange portion is formed as a bumper reinforcement. Since the impactor hits the impact absorbing part and absorbs the impact force while the impact absorbing part is deformed, the impact force is The bumper reinforcement is transmitted to the front side of the bumper reinforcement via the mounting flange, and is received by the bumper reinforcement. Even if they come into contact with each other, a uniform shock absorption amount can be exhibited and a shock absorbing function can be achieved.

  The vehicle impact reduction bumper device according to the present invention includes at least a pair of vehicle body side members extending in the front-rear direction of the vehicle body, a bumper stay installed on each side member, and a bumper connected to the bumper stay. In a vehicle impact reduction bumper device configured to include a reinforcement and an energy absorber attached to the bumper reinforcement, the energy absorber folds a plate material into a substantially U-shaped cross section and the vehicle body An impact absorbing portion extending in the left-right direction, a pair of abutting portions formed in the upper and lower end portions of the impact absorbing portion so as to project in the vertical direction of the vehicle body, and at each end portion of the both abutting portions. Each of which has a mounting flange portion that is bent toward the rear portion of the vehicle body, and the abutting portion is the bumper reinforcement. The mounting flange portion is mounted on both upper and lower side portions of the bumper reinforcement facing each other in the vertical direction of the vehicle body in a state of being in contact with the front side portion facing the vehicle body front side in the vehicle. To do.

  With this configuration, the energy absorber forms a pair of abutting portions at the upper and lower end portions of the shock absorbing portion formed by bending the plate material into a substantially U-shaped cross section, and further, each end portion of the both abutting portions. Even if the mounting flange is bent and formed, and the mounting flange is attached to both the upper and lower sides of the bumper reinforcement, the pair of contact parts will contact the front side of the bumper reinforcement. Therefore, when the impactor collides with the impact absorbing portion and absorbs the impact force while the impact absorbing portion is deformed, the impact force is applied to the bumper reinforcement via both contact portions. It is transmitted to the front side and is received by the bumper reinforcement. As a result, the impact absorbing part is independent of the impact position, and no matter which part the impactor always strikes, the impact is equal. To demonstrate the absorption will be obtained play an absorbing function of the shock.

  In addition, the vehicle impact reduction bumper device according to the present invention can be configured by attaching the mounting flange portion to the bumper reinforcement by welding.

  With this configuration, even if the welding of the mounting flange to the bumper reinforcement is performed by spot welding or the like with high bonding strength and intermittent intermittent welding, there is no dependency on the impact position in the shock absorbing portion, Even if the impactor collides with the part, the shock absorbing function can be achieved by exhibiting an even amount of shock absorption.

  In the vehicle impact reduction bumper device according to the present invention, the mounting flange portion may be detachably attached to the bumper reinforcement by a clip or a fastener such as a bolt and a nut.

  With this configuration, even if the mounting flange is mounted on the bumper reinforcement using an intermittent intermittent mounting configuration with a fastener, the impactor does not depend on the impact position in the shock absorber, and the impactor always impacts at any part. Even if it comes into contact, it will be possible to perform the shock absorbing function by exhibiting an even amount of shock absorption, and when the energy absorber is crushed by impact, remove the fastener only from the energy absorber. By removing from the bumper reinforcement, it becomes possible to replace with a new one and reduce the repair cost.

  The present invention configured as described above is that the impact absorbing portion is not dependent on the impact position, and even if the impactor is always in contact with any part, the impact absorbing function can be exhibited and the shock absorbing function can be achieved. Also, if the energy absorber is attached to the bumper reinforcement with a fastener, the repair cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view schematically illustrating an automobile impact reduction bumper device which is a vehicle according to an embodiment of the present invention. It is sectional drawing drawn along the AA line of FIG. 1 in the normal time of a motor vehicle. It is sectional drawing drawn along the AA line | wire of FIG. 1 at the time of the impactor collision with a motor vehicle. It is the graph which drew the relationship between the reaction force which a bumper reinforcement receives at the time of the impact absorption by the energy absorber in Example 1 which concerns on this invention, and a deformation | transformation stroke. It is sectional drawing similar to FIG. 3 in Example 2 which concerns on this invention. It is sectional drawing similar to FIG. 3 in Example 3 which concerns on this invention. It is sectional drawing similar to FIG. 3 in Example 4 which concerns on this invention. It is sectional drawing similar to FIG. 3 in Example 5 which concerns on this invention. It is sectional drawing similar to FIG. 3 in the normal time of the motor vehicle of the conventional impact reduction bumper apparatus for motor vehicles. It is sectional drawing similar to FIG. 4 at the time of the impactor collision of the motor vehicle of the conventional impact reduction bumper apparatus for motor vehicles. It is the graph which drew the relationship between the reaction force which a bumper reinforcement receives at the time of the impact absorption by the energy absorber in a prior art, and a deformation | transformation stroke.

  Next, Embodiment 1 according to the present invention will be described with reference to FIGS.

  First, referring to FIG. 1, at least a pair of left and right vehicle body side members 2 are arranged so as to extend in the front-rear direction of the vehicle body 1 so as to be a skeleton of the vehicle body 1 of the automobile.

  Bumper stays 3 are respectively fixed to the front end portions of the two vehicle body side members 2 by a plurality of bolts 3a. Between the bumper stays 3 positioned on the left and right, bumper reinforcements 4 are fastened by fasteners such as bolts (not shown). The bridge is fixed.

  The bumper reinforcement 4 is composed mainly of, for example, a square pipe such as a steel pipe, and has upper and lower double side portions 4a and 4b facing the vertical direction of the vehicle body 1 and a front side portion 4c facing the front direction of the vehicle body. Is configured.

  A bumper fascia 5 is disposed on the vehicle body 1 so as to be opposed to the front side portion 4c of the bumper reinforcement 4, and the bumper reinforcement 5 is beautifully mounted so that the bumper reinforcement 4 does not directly appear on the front surface of the vehicle body. is doing.

  Between the bumper reinforcement 4 and the bumper fascia 5, an energy absorber 7 for absorbing the impact of an impactor 6 (see FIG. 3) such as a pedestrian's leg colliding from the front of the vehicle body 1 is disposed. Has been.

  As shown in FIG. 2, the energy absorber 7 is formed by bending a plate material such as a steel material into a substantially U-shaped cross section in the vertical direction and extending along the bumper reinforcement in the left-right direction of the vehicle body 1. The absorption part 7a and a pair of mounting flange parts 7b formed to protrude in the vertical direction of the vehicle body 1 at both upper and lower ends of the shock absorption part 7a are configured.

  The attachment flange portion 7 b is welded to the front side portion 4 c of the bumper reinforcement 4 using a welding means such as spot welding, and the energy absorber 7 is attached to the bumper reinforcement 4.

  In the first embodiment configured as described above, the energy absorber 7 is formed by extending the mounting flange portion 7b at the upper and lower ends of the impact absorbing portion 7a formed by bending the plate material into a substantially U-shaped cross section. Since 7b is mounted on the front side 4c of the bumper reinforcement 4 facing the front of the vehicle body, an impactor 6 such as a pedestrian collides with the impact absorbing portion 7a, and this impact force is applied to the impact absorbing portion. When absorbing while deforming 7a, the impact force is transmitted to the front side portion 4c of the bumper reinforcement 4 via the mounting flange portion 7b and is received by the bumper reinforcement 4, and as a result, Even if the shock absorbing portion 7a is intermittently intermittently attached to the front side portion 4c of the mounting flange portion, the impact absorbing portion 7a is always impacted without depending on the impact position. -6 is may play also exerts a uniform shock absorption function of absorbing shock as the abutment (see Figure 3).

  As a result, as shown in FIG. 4, when the impactor 6 hits the welded portion of the energy absorber 7 to the bumper reinforcement 4 (X) and hits the non-welded portion (Y), It can be seen that there is almost no difference in the reaction force (impact absorption amount) to the bumper reinforcement 4 with respect to the deformation stroke of the energy absorber 7, and the dependency of the shock absorption position is difficult to occur.

  Next, a second embodiment according to the present invention shown in FIG. 5 will be described.

  In FIG. 5, an energy absorber 7 according to the second embodiment includes a shock absorber 7a formed by bending a plate material in a substantially U-shaped cross section and extending in the left-right direction of the vehicle body, and upper and lower ends of the shock absorber 7a. A pair of abutting portions 7c formed to project in the vertical direction of the vehicle body 1 and a mounting flange portion 7b formed to bend toward the rear portion of the vehicle body 1 at each end of the both abutting portions 7c. The mounting flange portion 7b is provided on the upper and lower side surfaces 4a of the bumper reinforcement 4 with the contact portion 7c being in contact with the front side portion 4c of the bumper reinforcement 4 facing the front side of the vehicle body. 4b, and is mounted by intermittent intermittent welding such as spot welding.

  With this configuration, the energy absorber 7 projects a pair of contact portions 7c that contact the front side portion 4c of the bumper reinforcement at the upper and lower ends of the shock absorbing portion 7a formed by bending the plate material into a substantially U-shaped cross section. Further, the mounting flange portion 7b is bent at each end of the both abutting portions 7c, and the mounting flange portion 7b is mounted on the upper and lower side portions 4a and 4b of the bumper reinforcement 4, for example. Even so, since the pair of abutting portions 7c are configured to abut on the front side portion 4c of the bumper reinforcement 4, the impactor 6 abuts against the impact absorbing portion 7a, and the impact force is applied to the impact absorbing portion. When absorbing while deforming 7 a, the impact force is transmitted to the front side portion 4 c of the bumper reinforcement 4 via both contact portions 7 c and is received by the bumper reinforcement 4. As a result, even if the impact absorbing portion 7a is intermittently intermittently attached to the upper and lower side surfaces 4a and 4b of the mounting flange portion, the impactor 6 is always located at any location without depending on the impact position. Even if it comes into contact, it will be able to perform an impact absorbing function by exhibiting an even amount of shock absorption.

  A third embodiment shown in FIG. 6 is a modification of the first embodiment shown in FIGS. 1 and 2, and the mounting flange portion 7b is attached to the front side portion 4c of the bumper reinforcement 4 by welding such as spot welding. The difference is that the method is not used, but is performed in a detachable state using fasteners such as clips or bolts 8 and nuts 9.

  With this configuration, in addition to being able to perform the impact absorbing function of the energy absorber 7 in the same manner as in the first embodiment, when the energy absorber 7 is crushed by impact, the clip or bolt 8 and nut 9 are used. By releasing the tightening state, only the energy absorber 7 can be removed from the bumper reinforcement 4, and the repair can be performed simply by replacing the energy absorber 7 with a new one, and the repair cost can be reduced. .

  Example 4 shown in FIG. 7 is a modification of Example 2 shown in FIG. 5, and the mounting flange portion 7 b is attached to the upper surface side portion 4 a and the lower surface side portion 4 b of the bumper reinforcement 4 by spot welding or the like. The difference is that the welding method is not used, but is performed in a detachable state using fasteners, for example, clips or bolts 8 and nuts 9.

  With this configuration, as in the second embodiment, in addition to being able to perform the impact absorbing function of the energy absorber 7, when the energy absorber 7 is crushed by impact, the clip or bolt 8 and the nut 9 are used. By releasing the tightening state, only the energy absorber 7 can be removed from the bumper reinforcement 4, and the repair can be performed simply by replacing the energy absorber 7 with a new one, and the repair cost can be reduced. .

  The fifth embodiment shown in FIG. 8 is another modification of the first embodiment shown in FIGS. 1 and 2, and the rear side portion of the bumper reinforcement 4 is used for the purpose of adjusting the rigidity of the bumper reinforcement 4. Although the point that d is formed discontinuously has a different configuration from that of the first embodiment, the same effects as those of the first embodiment are exhibited.

  In addition, although the shape of the shock absorbing portion 7a of the energy absorber 7 in any of the above embodiments is a stepless shape, the shape is not limited to this, and as in the case of FIG. Or you may form in several step shape.

  As described above, the present invention is capable of performing an impact absorbing function by exhibiting an equal amount of shock absorption regardless of the location where the impactor is in contact with the impact absorbing portion, regardless of the location of the impact absorbing portion. In addition, if the energy absorber is attached to the bumper reinforcement with fasteners, the repair cost can be reduced, so the bumper reinforcement is applied to the vehicle body side member via the bumper stay. It is suitable for a vehicle impact reduction bumper device or the like that is configured by connecting and installing an energy absorber on the bumper reinforcement.

DESCRIPTION OF SYMBOLS 1 Car body 2 Car body side member 3 Bumper stay 4 Bumper reinforcement 4a Upper surface side part 4b Lower surface side part 4c Front side part 5 Bumper fascia 6 Impactor 7 Energy absorber 7a Impact absorption part 7b Mounting flange part 7c Contact part 8 Bolt 9 nut

Claims (4)

  At least a pair of vehicle body side members extending in the longitudinal direction of the vehicle body, a bumper stay installed on each side member, a bumper reinforcement connected to the bumper stay, and energy mounted on the bumper reinforcement In the vehicle impact reduction bumper device configured to have an absorber, the energy absorber is formed by bending the plate material into a substantially U-shaped cross section and extending in the left-right direction of the vehicle body, A front side portion that is configured to have a mounting flange portion that is formed to project in the vertical direction of the vehicle body at each of the upper and lower ends of the shock absorbing portion and that faces the vehicle body front side in the bumper reinforcement A bumper device for impact reduction for vehicles, characterized by being mounted on the vehicle.   At least a pair of vehicle body side members extending in the longitudinal direction of the vehicle body, a bumper stay installed on each side member, a bumper reinforcement connected to the bumper stay, and energy mounted on the bumper reinforcement In the vehicle impact reduction bumper device configured to have an absorber, the energy absorber is formed by bending the plate material into a substantially U-shaped cross section and extending in the left-right direction of the vehicle body, A pair of abutting portions projecting in the vertical direction of the vehicle body at the upper and lower end portions of the shock absorbing portion, and bent at the respective end portions of the both abutting portions toward the rear portion of the vehicle body. The abutting portion is made to contact the front side of the bumper reinforcement facing the front side of the vehicle body. In a state of being, it said mounting flange portion of the bumper reinforcement for a vehicle shock absorbing bumper system, characterized in that respectively mounted on upper and lower surfaces sides respectively facing the vehicle vertical directions side in.   The impact reducing bumper device for a vehicle according to claim 1 or 2, wherein the mounting flange portion is attached to the bumper reinforcement by welding.   The vehicle impact reduction bumper device according to claim 1 or 2, wherein the mounting flange portion is detachably attached to the bumper reinforcement by a fastener such as a clip or a bolt and a nut.