JP2011110991A - Vehicular front structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular front structure adequately ensuring the shock-absorbing performance along the vehicle width direction. <P>SOLUTION: In a vehicle front part 10, an upper bumper absorber 16 extending along the vehicle width direction is arranged on the vehicle front side of a front bumper reinforcement 14. A lower bumper absorber 18 extending along the vehicle width direction is arranged on the vehicle lower side of the upper bumper absorber 16. An end face of a front end 18A of a center part in the vehicle width direction of the lower bumper absorber 18 is arranged to be substantially at the same position as an end face of a front end 16A of the center part in the vehicle width direction of the upper bumper absorber 16 in the longitudinal direction of the vehicle. Further, the end face of the front end 18A of both ends in the vehicle width direction of the lower bumper absorber 18 is arranged to be projected forward of the vehicle from the end face of the front end 16A of both ends in the vehicle width direction of the upper bumper absorber 16 (on the vehicle front side of a crash box 12). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle front structure.

  In the following Patent Document 1, an upper impact absorbing member is interposed between the upper bumper beam and the bumper face, and a lower impact absorbing member is interposed between the lower frame and the bumper face. A configuration is disclosed in which the front end portion position is set in front of the vehicle from the front end portion position of the bumper face at the top of the bumper.

JP 2001-277964 A

  According to Patent Document 1, the position of the tip of the bumper face at the bottom of the bumper and the position of the tip of the bumper face at the top of the bumper are arranged in substantially the same positional relationship from the center in the vehicle width direction to both ends in the vehicle width direction. Yes. In this configuration, a support member such as a crash box that supports the upper bumper beam is disposed at both ends of the upper bumper beam in the vehicle width direction. When a pedestrian or the like collides, the support member is attached to the upper shock absorbing member on the vehicle front side. Since the load increases from the center in the vehicle width direction, there is a possibility that the impact absorbing performance at both ends in the vehicle width direction is lower than the center in the vehicle width with respect to pedestrian protection.

  An object of the present invention is to obtain a vehicle front structure capable of ensuring appropriate shock absorption performance along the vehicle width direction in consideration of the above facts.

  The vehicle front portion structure according to the invention of claim 1 is provided on the vehicle front side along a bumper-in hose extending along the vehicle width direction, and receives the load at the time of collision of a collision body, A lower absorber that is provided on the vehicle lower side of the bumper inn hose with an interval therebetween, the rear end portion of which is fixed to the vehicle main body and that receives a load at the front end portion when a collision object collides, and the lower absorber Compared with the vehicle width direction center part, the part corresponding to the vehicle main body attachment part of the bumper-in hose on both sides in the vehicle width direction of the lower absorber is configured to receive a large load.

  According to a second aspect of the present invention, in the vehicle front portion structure according to the first aspect, the lower absorber includes a positional relationship in a vehicle longitudinal direction between a vehicle width direction center portion and a front end portion of the upper absorber on the vehicle upper side. In comparison, the parts corresponding to the vehicle body mounting portions of the bumper-in hose on both sides in the vehicle width direction are arranged so as to protrude forward of the vehicle from the front end of the upper absorber on the vehicle upper side. It is.

  According to a third aspect of the present invention, in the vehicle front portion structure according to the first aspect, the lower absorber has a portion corresponding to a vehicle body mounting portion of the bumper innose on both sides in the vehicle width direction, rather than a center portion in the vehicle width direction. It is formed with high rigidity.

  According to the first aspect of the present invention, the upper absorber is provided on the front side of the vehicle along the bumper-in hose, and the lower absorber is provided at an interval on the vehicle lower side of the bumper-in hose. The load is received by the upper absorber and the lower absorber when a collision body such as a person collides. In that case, compared with the vehicle width direction center part in a lower absorber, a large load can be received in the part corresponding to the vehicle body attachment part of the bumper innose on both sides in the vehicle width direction where the load tends to be large. As a result, the collision reaction force applied to the lower limbs of the pedestrian can be reduced, and appropriate shock absorbing performance can be ensured along the vehicle width direction with respect to pedestrian protection.

  According to the second aspect of the present invention, the lower absorber is a vehicle having bumper rein hoses on both sides in the vehicle width direction compared to the positional relationship in the vehicle front-rear direction with the front end portion of the upper absorber in the vehicle width direction center. The part corresponding to the main body mounting part protrudes to the vehicle front side from the front end part of the upper absorber, and can receive a large load more reliably on both sides in the vehicle width direction, where the load tends to be larger than the center part in the vehicle width direction. . In addition, the lower absorber protrudes from the front end of the upper absorber toward the vehicle front side on both sides in the vehicle width direction, which has less influence on the design, and the protrusion of the lower absorber toward the vehicle front side is reduced at the center in the vehicle width direction. The design property of the bumper member becomes good.

  According to the third aspect of the present invention, in the lower absorber, the portions corresponding to the vehicle body mounting portions of the bumper in hoses on both sides in the vehicle width direction are formed with higher rigidity than the central portion in the vehicle width direction, and the load is reduced. It is possible to receive a larger load on both sides in the vehicle width direction, which tends to increase, than in the center portion in the vehicle width direction.

  As described above, the vehicle front portion structure according to the present invention according to the first aspect has an excellent effect that it is possible to ensure appropriate shock absorption performance along the vehicle width direction with respect to pedestrian protection.

  The vehicle front structure according to the second aspect of the present invention has an excellent effect that a large load can be received more reliably on both sides in the vehicle width direction, where the load tends to be larger than in the vehicle width direction center. Moreover, both designability and impact absorbing performance can be achieved.

  The vehicle front structure according to the third aspect of the present invention has an excellent effect that a large load can be more reliably received on both sides in the vehicle width direction, where the load tends to be larger than in the vehicle width direction center.

It is a top view showing the whole vehicle front part structure concerning a 1st embodiment. It is a longitudinal cross-sectional view which shows the whole structure of the vehicle front part structure in the AA in FIG. It is a longitudinal cross-sectional view which shows the whole structure of the vehicle front part structure in the BB line in FIG. It is a front view which shows the lower bumper absorber used for the vehicle front part structure which concerns on 2nd Embodiment. It is a front view which shows the lower bumper absorber used for the vehicle front part structure which concerns on 3rd Embodiment.

  Hereinafter, the first embodiment of the vehicle front structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 is a plan view showing the overall configuration of the vehicle front structure according to the present embodiment. FIG. 2 is a longitudinal sectional view showing the overall structure of the vehicle front structure at the vehicle width direction end of the upper bumper absorber, and FIG. 3 shows the vehicle structure in the vehicle width direction intermediate portion of the upper bumper absorber. The overall configuration of the vehicle front structure is shown in a longitudinal sectional view. As shown in these drawings, a front side member 11 that is a vehicle skeleton member extends along the vehicle front-rear direction on both sides of the vehicle front portion 10, and the front side member 11 extends in the vehicle front-rear direction. A crash box 12 is supported at the front end. A front bumper inhose 14 extending along the vehicle width direction is attached to the front end of the crash box 12 in the vehicle front-rear direction. The front bumper-in hose 14 is formed in a hat shape in cross section and is open to the vehicle rear side (see FIG. 2). The front end portion 12A of the substantially rectangular crash box 12 is inserted into the concave portion 14A on the vehicle rear side of the front bumper inhose 14, and the front bumper inhose 14 and the crash box 12 are in surface contact with each other. Are joined by welding or the like.

  An upper bumper absorber 16 (upper absorber) extending along the vehicle width direction is disposed on the vehicle front side of the front bumper inner hose 14. The upper bumper absorber 16 has a substantially rectangular cross section along the vehicle front-rear direction, and the upper and lower corners of the front end portion 16A on the vehicle front side are formed in an R shape. The rear end surface 16B of the upper bumper absorber 16 is fixed to the front surface portion 14B of the front bumper reinhose 14 by fixing means (not shown). The upper bumper absorber 16 is made of a foamable material such as urethane foam. When the upper bumper absorber 16 collides with a collision body, the upper bumper absorber 16 is compressed and deformed in the vehicle front-rear direction (thickness direction of the upper bumper absorber 16) to generate impact energy. It is designed to absorb.

  On the vehicle lower side of the upper bumper absorber 16, a lower bumper absorber 18 (lower absorber) extending along the vehicle width direction is disposed at a distance from the upper bumper absorber 16. The lower bumper absorber 18 is formed of resin or the like, and includes a plurality of ribs 19B along the vehicle width direction on the lower side of the planar upper surface portion 19A. Although the lower bumper absorber 18 is not illustrated, the rear end portion in the vehicle front-rear direction is supported by the vehicle frame member. When the lower bumper absorber 18 collides with a collision object, the lower bumper absorber 18 is deformed in the vehicle front-rear direction to absorb impact energy.

  As shown in FIG. 1, the upper bumper absorber 16 is formed in a curved shape such that a central portion in the vehicle width direction protrudes toward the front side of the vehicle and both end portions in the vehicle width direction retreat toward the rear side of the vehicle. Further, the lower bumper absorber 18 is formed in a gently curved shape such that the central portion in the vehicle width direction slightly protrudes toward the vehicle front side, and both end portions in the vehicle width direction slightly retract toward the vehicle rear side.

  At that time, as shown in FIG. 3, the end surface of the front end portion 18A of the lower bumper absorber 18 at the center in the vehicle width direction is the end surface of the front end portion 16A of the center portion of the upper bumper absorber 16 at the vehicle upper side in the vehicle width direction. And are arranged so as to be substantially the same position in the vehicle longitudinal direction. On the other hand, as shown in FIG. 2, the end surfaces of the front end portion 18 </ b> A of the both ends in the vehicle width direction of the lower bumper absorber 18 (the vehicle front side of the crash box 12) are the upper bumper absorber 16 on the vehicle upper side. It is arranged so as to protrude forward in the vehicle front-rear direction as shown by an arrow C in FIG. 2 from the end face of the front end portion 16A at both ends in the vehicle width direction (vehicle forward side of the crash box 12). That is, compared with the vehicle width direction center part in the lower bumper absorber 18, the portion corresponding to the vehicle front side of the crash box 12 on both sides in the vehicle width direction of the lower bumper absorber 18 is the upper bumper absorber when the collision object collides. 16 is configured to come into contact with the collision body before the front end portion 16A and receive a large load.

  As shown in FIGS. 2 and 3, a front bumper cover 20 extending along the vehicle width direction with a predetermined distance from the upper bumper absorber 16 is disposed on the vehicle front side of the upper bumper absorber 16. ing. As shown in FIG. 2, at both ends in the vehicle width direction of the front bumper cover 20, the end surface of the front end portion 18 </ b> A of the lower bumper absorber 18 projects to the vehicle front side from the end surface of the front end portion 16 </ b> A of the upper bumper absorber 16. Corresponding to the above, the lower part 20B of the front bumper cover 20 protrudes forward of the vehicle rather than the upper part 20A.

  As shown in FIG. 3, the front bumper cover 20 corresponds to a shape in which the position of the end surface of the front end portion 18 </ b> A of the lower bumper absorber 18 and the end surface of the front end portion 16 </ b> A of the upper bumper absorber 16 are the same in the vehicle width direction center portion. And the upper 20A and the lower 20B of the front bumper cover 20 are formed with substantially the same amount of protrusion on the vehicle front side. In other words, in the present embodiment, the lower bumper absorber 18 has a lower design of the design by reducing the protrusion of the front end 18A toward the front of the vehicle at the vehicle width direction central portion of the lower bumper absorber 18. At both ends in the vehicle width direction of 18, the overhang of the front end portion 18A toward the vehicle front side is increased to ensure shock absorbing performance.

  Next, the operation and effect of this embodiment will be described.

  An upper bumper absorber 16 is provided on the front side of the vehicle along the front bumper intake hose 14, and a lower bumper absorber 18 is provided on the vehicle lower side of the front bumper intake hose 14 with a gap therebetween. The load is received by the upper bumper absorber 16 and the lower bumper absorber 18 at the time of the collision of the person. At this time, the end surface of the front end portion 18A of the lower bumper absorber 18 at the center in the vehicle width direction and the end surface of the front end portion 16A of the upper bumper absorber 16 at the center of the vehicle width direction are substantially the same in the vehicle longitudinal direction. The end surface of the front end portion 18A of the lower bumper absorber 18 protrudes further toward the vehicle front side than the end surface of the front end portion 16A of the upper bumper absorber 16 as it goes to the portions corresponding to the crash boxes 12 on both sides in the width direction. Compared with the vehicle width direction center part in 18, the parts corresponding to the crash boxes 12 on both sides in the vehicle width direction can receive a larger load. That is, in the portions corresponding to the crash boxes 12 on both sides in the vehicle width direction, the load on the upper bumper absorber 16 is likely to increase more than in the center portion in the vehicle width direction when the collision object collides, but both sides in the vehicle width direction in the lower bumper absorber 18 Thus, by causing the front end portion 18A to protrude forward of the vehicle from the front end portion 16A of the upper bumper absorber 16, a large load can be received. As a result, the collision reaction force applied to the lower limbs of the pedestrian can be reduced, and appropriate shock absorbing performance can be ensured along the vehicle width direction with respect to pedestrian protection.

  Further, the front end portion 18A of the lower bumper absorber 18 protrudes forward of the front end portion 16A of the upper bumper absorber 16 on both sides in the vehicle width direction with little influence on the design, and the lower bumper absorber 18 is formed at the center portion in the vehicle width direction. By reducing the protrusion of the front end 18A toward the front side of the vehicle, the design of the front bumper cover 20 is improved.

  Next, a second embodiment of the vehicle front structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 4, in the present embodiment, the lower bumper absorber 40 has a vehicle width direction center portion of the front end portion 40A protruding toward the vehicle front side, and both vehicle width direction end portions of the front end portion 40A retracted toward the vehicle rear side. The upper surface portion 40B of the lower bumper absorber 40 is provided with a plurality of ribs 40C that protrude upward in the vehicle along the vehicle front-rear direction. The plurality of ribs 40C increase the number of the ribs 40C toward both sides in the vehicle width direction, thereby increasing the rigidity of both ends in the vehicle width direction of the lower bumper absorber 40 than in the vehicle width direction center. The configuration of the upper bumper absorber 16 (see FIG. 1) is the same as that of the first embodiment.

  In such a vehicle front part structure, the rigidity of the both ends in the vehicle width direction of the lower bumper absorber 40 is increased more than the center in the vehicle width direction, so that the lower bumper absorber 40 extends from the center in the vehicle width direction to both ends in the vehicle width direction. As you go, you can receive a large load when the collision object collides. As a result, the collision reaction force applied to the lower limbs of the pedestrian can be reduced, and appropriate shock absorbing performance can be ensured along the vehicle width direction with respect to pedestrian protection.

  Next, a third embodiment of the vehicle front structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, in the present embodiment, the lower bumper absorber 50 has a cross-sectional thickness in the vehicle vertical direction at both end portions 52 </ b> B in the vehicle width direction rather than a cross-sectional thickness in the vehicle vertical direction at the vehicle width direction central portion 52 </ b> A. Is formed to be thick. The vehicle width direction of the lower bumper absorber 50 is increased by making the thickness of the cross section in the vehicle vertical direction of the both ends 52B in the vehicle width direction larger than the thickness of the cross section in the vehicle vertical direction of the vehicle width direction central portion 52A of the lower bumper absorber 50. The rigidity of both end portions 52B in the vehicle width direction is higher than that of the central portion 52A. Further, the lower bumper absorber 50 is formed in a curved shape such that the center portion in the vehicle width direction of the front end portion 50A protrudes toward the vehicle front side, and both end portions in the vehicle width direction of the front end portion 50A recede toward the vehicle rear side ( (See FIG. 4). The configuration of the upper bumper absorber 16 (see FIG. 1) is the same as that of the first embodiment.

  In such a vehicle front portion structure, the rigidity of the vehicle width direction both end portions 52B is higher than the vehicle width direction center portion 52A of the lower bumper absorber 50, so that the vehicle width direction from the vehicle width direction center portion 52A of the lower bumper absorber 50 is increased. As it goes to both ends 52B, a large load can be received when the collision object collides. As a result, the collision reaction force applied to the lower limbs of the pedestrian can be reduced, and appropriate shock absorbing performance can be ensured along the vehicle width direction with respect to pedestrian protection.

  [Supplementary explanation of the embodiment]

  In the second and third embodiments described above, the number of ribs is increased as it goes to both sides of the lower bumper absorber in the vehicle width direction, or the thickness of the cross section becomes thicker as it goes to both sides of the lower bumper absorber in the vehicle width direction. However, the present invention is not limited to this, and other configurations such as changing the hardness of the lower bumper absorber can be used as long as the rigidity of both ends in the vehicle width direction is increased with respect to the vehicle width direction central portion of the lower bumper absorber. It may be configured.

  In the above-described first to third embodiments, the bumper absorber of the present invention is applied to the vehicle front portion 10, but the bumper absorber of the present invention can also be applied to the rear side of the vehicle.

10 Vehicle front 12 Crash box (vehicle body mounting part)
14 Front bumper in horse (Bumper in horse)
16 Upper bumper absorber (Upper absorber)
16A Front end 18 Lower bumper absorber 18A Front end 40 Lower bumper absorber 40A Front end 40C Rib 50 Lower bumper absorber 52A Vehicle width direction center portion 52B Vehicle width direction both ends

Claims (3)

An upper absorber provided on the vehicle front side along a bumper inn hose extending along the vehicle width direction and receiving a load when a collision object collides;
A lower absorber that is provided at an interval on the vehicle lower side of the bumper inn hose, has a rear end fixed to the vehicle body, and receives a load at the front end when a collision object collides,
Compared with the vehicle width direction center part in the lower absorber, the vehicle front part configured such that the portions corresponding to the vehicle body mounting parts of the bumper inhose on both sides in the vehicle width direction of the lower absorber receive a large load Construction.   The lower absorber has a vehicle body mounting portion of the bumper rein hose on both sides in the vehicle width direction as compared with the positional relationship in the vehicle front-rear direction between the vehicle width direction center portion and the front end portion of the upper absorber on the vehicle upper side. The vehicle front portion structure according to claim 1, wherein a portion corresponding to is disposed so as to protrude forward of the vehicle from a front end portion of the upper absorber on the vehicle upper side.   2. The vehicle front structure according to claim 1, wherein the lower absorber has a portion corresponding to a vehicle body mounting portion of the bumper innose on both sides in the vehicle width direction that is formed with higher rigidity than a center portion in the vehicle width direction.

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