JP2012171405A - Vehicle front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle front structure configured to sufficiently collapse a bumper absorber when a local load is input to a part provided with a duct of the bumper absorber.SOLUTION: The resin bumper absorber 20 is arranged along a vehicle width direction. An upper duct 22 is formed in an upper surface part 20A of the bumper absorber 20, and a lower duct 24 is formed in an under surface part 20B of the bumper absorber 20, which are integrally molded. The upper duct 22 has vertical wall parts 22A and 22B along the vehicle longitudinal direction on both sides in the vehicle width direction. The lower duct 24 has vertical wall parts 24A and 24B along the vehicle longitudinal direction on both sides in the vehicle width direction. The vertical wall parts 22A and 22B of the upper duct 22 and the vertical wall parts 24A and 24B of the lower duct 24 are arranged in a position shifted in the vehicle width direction to the bumper absorber 20 in a vehicle front view.

Description

  The present invention relates to a vehicle front structure.

  In Patent Document 1 below, a partition plate portion that suppresses the sneaking of hot air from the engine is provided at the upper portion of a foamed resin bumper absorber, and a notch is provided at the front portion of the partition plate portion to make it easy to break. A front bumper structure that suppresses a decrease in shock absorbing performance is disclosed.

JP 2010-42783 A

  In the structure described in Patent Document 1, there is no disclosure of providing a partition plate portion at the lower portion of the bumper absorber. If the pair of upper and lower partition plates are set at the same position in the vehicle vertical direction of the bumper absorber, only the portion where the partition plate portion of the bumper absorber is provided becomes too hard, and when the local load is input to the portion, the bumper The absorber may not be crushed sufficiently.

  In consideration of the above-described facts, the present invention has an object to obtain a vehicle front structure that can cause the bumper absorber to be sufficiently crushed when a local load is input to a portion where the bumper absorber duct is provided. .

  The vehicle front structure according to the first aspect of the present invention is disposed on the front side of the bumper reinforcement at the front of the vehicle, and is provided on the upper and lower surfaces of the bumper absorber extending along the vehicle width direction. The bumper absorber is disposed on the vehicle front side of the bumper absorber, and constitutes a part of the duct so that the mounting positions of the bumper absorber on the upper surface and the lower surface are shifted in the vehicle width direction when viewed from the front of the vehicle. And a pair of upper and lower duct vertical wall portions that guide the traveling wind from the front grill to the heat exchanger.

  According to a second aspect of the present invention, in the vehicle front portion structure according to the first aspect, the vertical duct vertical wall portion is integrally formed with the bumper absorber and resin.

  According to a third aspect of the present invention, in the vehicle front portion structure according to the first or second aspect, the upper and lower duct vertical wall portions are respectively provided at both ends of the bumper absorber in the vehicle width direction.

  According to the first aspect of the present invention, the bumper absorber is extended along the vehicle width direction on the front side of the bumper reinforcement at the front portion of the vehicle, and a part of the duct is formed on the upper surface and the lower surface of the bumper absorber. A pair of vertical duct vertical wall portions are provided for guiding the traveling wind from the front grill disposed on the vehicle front side of the bumper absorber to the heat exchanger. When viewed from the front of the vehicle, the pair of upper and lower duct vertical wall portions are arranged such that the mounting positions of the bumper absorber on the upper and lower surfaces are shifted in the vehicle width direction, and the pair of upper and lower duct vertical wall portions are attached to the bumper absorber. It is suppressed that a site | part becomes hard locally. For this reason, when a local load is input from the front of the vehicle to a portion where the vertical duct vertical wall portion of the bumper absorber exists, the bumper absorber can be sufficiently crushed. Further, since the portion where the bumper absorber duct exists is not weakened, the energy absorption performance of the bumper absorber is not lowered at the time of a surface collision (at the time of a frontal collision with a vehicle or the like).

  According to the second aspect of the present invention, the vertical duct vertical wall portion is integrally formed of a bumper absorber and a resin, and when a local load is input to a site where the vertical duct vertical wall portion exists with a simple configuration. It is possible to cause sufficient bumper absorber crushing.

  According to the third aspect of the present invention, the vertical wall portions of the upper and lower ducts are respectively provided at both ends of the bumper absorber in the vehicle width direction, and heat from the front grille on the front side of the vehicle is more efficiently exchanged. Can lead to a vessel.

  As described above, the vehicle front part structure according to the present invention according to the first aspect of the present invention can sufficiently collapse the bumper absorber when a local load is input to a portion where the vertical wall portion of the upper and lower ducts of the bumper absorber exists. It has an excellent effect that it can be generated.

  The vehicle front structure according to the second aspect of the present invention can cause a sufficient collapse of the bumper absorber when a local load is input to a portion where the vertical wall of the vertical duct exists with a simple configuration. It has an excellent effect.

  The vehicle front structure according to the third aspect of the present invention has an excellent effect that the traveling wind from the front grille on the front side of the vehicle can be more efficiently guided to the heat exchanger.

It is a perspective view which shows the front part of the vehicle to which the vehicle front part structure which concerns on 1st Embodiment was applied. It is a perspective view showing the whole vehicle front part structure concerning a 1st embodiment. FIG. 3 is an enlarged perspective view showing a part where a bumper absorber, an upper duct and a lower duct used in the vehicle front structure shown in FIG. 2 are integrally formed. It is a perspective view which shows the state in which a local load is input into the site | part in which the upper duct and the lower duct in the bumper absorber were provided. It is a perspective view which shows the state in which the load at the time of a surface collision is input into the site | part in which the upper duct and the lower duct in the bumper absorber were provided. It is an expansion perspective view which shows the site | part by which the bumper absorber used for the vehicle front part structure which concerns on a comparative example, an upper duct, and a lower duct were integrally molded.

  Hereinafter, an embodiment of a 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 shows a front portion of a vehicle to which the vehicle front structure according to the present embodiment is applied. FIG. 2 shows the overall configuration of the vehicle front structure according to the present embodiment. As shown in FIG. 1, front side members 12 as vehicle skeleton members extending along the vehicle front-rear direction are disposed on both sides of a front portion 11 of a vehicle 10 of an automobile. A crash box 16 as an impact absorbing member is provided via a reinforcing plate 14 in front of the front side member 12 in the vehicle. A front bumper reinforcement 18 extending along the vehicle width direction is disposed on the vehicle front side of the crash box 16.

  The front bumper reinforcement 18 is a metal bumper skeleton member, and a resin bumper as an energy absorbing member (buffer member) extending along the vehicle width direction is provided on the vehicle front side of the front bumper reinforcement 18. An absorber 20 is provided. On the upper surface portion 20A of the bumper absorber 20, an upper duct 22 is provided as a duct formed of a substantially U-shaped plate material when the vehicle is viewed from the front. The lower surface portion 20B of the bumper absorber 20 is provided with a lower duct 24 as a duct formed of a substantially U-shaped plate material that is opposite to the upper duct 22 in a front view of the vehicle.

  On the vehicle rear side of the front bumper reinforcement 18, a rectangular radiator support 26 extending along the vehicle vertical direction and the vehicle width direction is disposed between the front side members 12 on both sides. A cooling system component 28 as an example of a heat exchanger is fixed to the radiator support 26. The cooling system component 28 is, for example, a radiator, an air conditioner condenser, or a combination thereof. A bumper cover (not shown) that covers the bumper absorber 20, the upper duct 22, and the lower duct 24 from the front of the vehicle is provided on the front side of the bumper absorber 20.

  As shown in FIG. 2, the bumper absorber 20 has a substantially hat shape with a cross section opened to the rear side of the vehicle in a side view of the vehicle, and includes an upper end flange portion 20 </ b> C at an upper end portion and a lower end portion in the vehicle vertical direction. A lower end flange portion 20D is provided. The bumper absorber 20 is fixed to the front bumper reinforcement 18 with a clip or the like (not shown) in a state where the upper end flange portion 20C and the lower end flange portion 20D are in surface contact with the front wall portion of the front bumper reinforcement 18 (see FIG. 1). ing.

  As shown in FIG. 2, the upper duct 22 and the lower duct 24 are made of resin and are integrally formed with the bumper absorber 20. The upper duct 22 connects a pair of left and right vertical wall portions (upper duct vertical wall portions) 22A and 22B extending from the upper surface portion 20A of the bumper absorber 20 to the vehicle upper side and the upper ends of these vertical wall portions 22A and 22B. Thus, the horizontal wall portion 22 </ b> C disposed along the vehicle width direction is provided. The pair of left and right vertical wall portions 22A and 22B are arranged along the vehicle longitudinal direction and the vehicle vertical direction.

  The lower duct 24 connects a pair of left and right vertical wall portions (lower duct vertical wall portions) 24A and 24B extending from the lower surface portion 20B of the bumper absorber 20 to the vehicle lower side, and the lower ends of these vertical wall portions 24A and 24B. Thus, the horizontal wall portion 24 </ b> C disposed along the vehicle width direction is provided. The pair of left and right vertical wall portions 24A and 24B are disposed along the vehicle front-rear direction and the vehicle vertical direction.

  By providing a substantially U-shaped upper duct 22 on the upper surface portion 20A of the bumper absorber 20 and a substantially U-shaped lower duct 24 on the lower surface portion 20B of the bumper absorber 20 when viewed from the front of the vehicle. The traveling wind from a front grill (not shown) disposed at the front end of the vehicle 10 is efficiently guided (taken in) to the cooling system component 28 along the upper duct 22 and the lower duct 24. Further, hot air from an engine disposed in an engine room (not shown) on the rear side of the vehicle from the front bumper reinforcement 18 is prevented from flowing into the front side of the cooling system component 28 from above, below and both sides of the bumper absorber 20. It has become so.

  As shown in FIGS. 2 and 3, the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24 provided in the bumper absorber 20 in the vehicle front view are arranged in the vehicle width direction. It is arranged at a shifted position (a different position in the vehicle width direction). In the present embodiment, the vertical wall portions 22A and 22B of the upper duct 22 are disposed on the inner side in the vehicle width direction with respect to the bumper absorber 20 with respect to the bumper absorber 20 with respect to the vertical wall portions 24A and 24B of the lower duct 24. The vertical wall portions 22A and 22B of the upper duct 22 may be arranged on the outer side in the vehicle width direction than the vertical wall portions 24A and 24B of the lower duct 24.

  Since the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24 provided in the bumper absorber 20 in a front view of the vehicle are arranged at positions shifted in the vehicle width direction, The vertical wall portions 22 </ b> A and 22 </ b> B of the duct 22 and the vertical wall portions 24 </ b> A and 24 </ b> B of the lower duct 24 are prevented from being locally hardened. As a result, when the local load is input to the attachment portions of the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24 to the bumper absorber 20, sufficient collapse of the bumper absorber 20 is prevented. Can be generated. For example, the bumper absorber 20 is crushed when an impact is applied from the legs of the pedestrian to the attachment portions of the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24 to the bumper absorber 20. The shock is absorbed by this.

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

  In the vehicle front structure of the present embodiment, the upper duct 22 on the upper surface portion 20A of the bumper absorber 20 is substantially U-shaped when viewed from the front of the vehicle, and the lower surface portion 20B of the bumper absorber 20 is approximately U-shaped when viewed from the front of the vehicle. By providing the lower duct 24, the traveling wind from the front grill (not shown) disposed at the front end of the vehicle 10 (the vehicle front side of the bumper absorber 20) is moved along the upper duct 22 and the lower duct 24. It is possible to efficiently lead to the cooling system component 28 on the rear side. In addition, a substantially U-shaped upper duct 22 is provided on the upper surface portion 20A of the bumper absorber 20 as viewed from the front of the vehicle, and a substantially U-shaped lower duct 24 is provided on the lower surface portion 20B of the bumper absorber 20 when viewed from the front of the vehicle. Accordingly, hot air from an engine (not shown) disposed on the rear side of the vehicle from the front bumper reinforcement 18 is blocked by the upper duct 22 and the lower duct 24, and the hot air is cooled from above, below, and both sides of the bumper absorber 20. It is possible to suppress wrapping around the front side of the system part 28.

  In this vehicle front structure, the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24, which are integrally formed with the bumper absorber 20, are arranged at positions shifted in the vehicle width direction. ing. Thereby, it is suppressed that the attachment site | part to the bumper absorber 20 of vertical wall part 22A, 22B of the upper duct 22 and vertical wall part 24A, 24B of the lower duct 24 becomes hard locally.

  For example, as shown in FIG. 4, the pole-shaped member 50 collides with the front portion 11 of the vehicle 10, and the bumper absorber 20 of the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24. When a local load is input to the attachment site, sufficient bumper absorber 20 can be crushed. For this reason, for example, when an impact is applied from the pedestrian's leg to the mounting portions of the vertical wall portions 22A, 22B and the vertical wall portions 24A, 24B to the bumper absorber 20, the pedestrian's leg portion (leg impactor). ) Can be reduced.

  In addition, since the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24 are not weakened, the energy absorbing performance of the bumper absorber 20 during a surface collision of the vehicle 10 is avoided. Will never go down. For example, as shown in FIG. 5, a structure (barrier) 60 such as a vehicle collides with the front portion 11 of the vehicle 10, and the vertical wall portions 22 </ b> A and 22 </ b> B of the upper duct 22 and the vertical wall portion 24 </ b> A of the lower duct 24. The energy absorption performance of the bumper absorber 20 is not deteriorated when a collision load is input to the region including the part attached to the bumper absorber 20 of 24B.

  FIG. 6 shows a vehicle front portion 100 to which the vehicle front portion structure according to the comparative example is applied. In the front portion 100 of the vehicle, a vertical wall portion 102A of the upper duct 102 is integrally formed of resin on the upper surface portion 20A of the bumper absorber 20, and a vertical wall portion 104A of the lower duct 104 is formed on the lower surface portion 20B of the bumper absorber 20. Is integrally formed of resin. The attachment part to the bumper absorber 20 of the vertical wall portion 102A of the upper duct 102 and the vertical wall portion 104A of the lower duct 104 is set at substantially the same position in the vehicle width direction when viewed from the front of the vehicle. In this structure, when the vertical wall portion 102A of the upper duct 102 and the vertical wall portion 104A of the lower duct 104 are attached to the bumper absorber 20 locally, when the local load is input to the corresponding portion, the bumper absorber 20 may not collapse sufficiently.

  On the other hand, in the vehicle front part structure of the present embodiment, as shown in FIGS. 2 and 3 and the like, the attachment portions of the vertical wall portions 22A and 22B and the vertical wall portions 24A and 24B to the bumper absorber 20 are vehicles. Since it is disposed at a position shifted in the width direction, a sufficient load of the bumper absorber 20 can be obtained when a local load is input to the attachment portions of the vertical wall portions 22A and 22B and the vertical wall portions 24A and 24B to the bumper absorber 20. Can be crushed.

  Further, the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24 are integrally formed with the bumper absorber 20 and resin, and the vertical wall portions 22A and 22B and the vertical wall portions 24A and 24B are formed. With a simple configuration in which the position is shifted in the vehicle width direction, it is possible to suppress local attachment of the vertical wall portions 22A and 22B and the vertical wall portions 24A and 24B to the bumper absorber 20 from being locally hardened.

  In the above-described embodiment, the upper duct 22 and the lower duct 24 are integrally formed with the bumper absorber 20, but the present invention is not limited to this, and the upper duct 22 and the lower duct 24 are configured as separate parts, and these are formed as bumpers. You may make it attach to the upper surface part 20A and the lower surface part 20B of the absorber 20 with attachment members, such as a clip.

  In the above-described embodiment, the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24 are provided in a direction (vehicle longitudinal direction) orthogonal to the longitudinal direction of the bumper absorber 20. However, the present invention is not limited to this, and the vertical wall portions 22 </ b> A and 22 </ b> B of the upper duct 22 and the vertical wall portions 24 </ b> A and 24 </ b> B of the lower duct 24 may be provided in a direction intersecting the longitudinal direction of the bumper absorber 20.

  Furthermore, in the above-described embodiment, the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24 are provided at both ends in the longitudinal direction of the bumper absorber 20, but the present invention is not limited to this. Instead, they may be provided at other positions. Further, the number of the vertical wall portions 22A and 22B of the upper duct 22 and the vertical wall portions 24A and 24B of the lower duct 24 is not limited to this embodiment, and can be appropriately changed without departing from the gist of the present invention. It is.

  In the above-described embodiment, the vehicle 10 equipped with an engine such as a gasoline vehicle or an HV vehicle (hybrid vehicle) has been described. However, the present invention is not limited to this, and the present invention is also applied to an EV vehicle (electric vehicle) not equipped with an engine. The invention can be applied.

10 Vehicle 11 Front 20 Bumper Absorber 20A Upper Surface (Upper Surface)
20B Bottom surface (bottom surface)
22 Upper duct (duct)
22A, 22B vertical wall (upper duct vertical wall)
24 Lower duct (duct)
24A, 24B vertical wall (lower duct vertical wall)
28 Cooling system parts (heat exchanger)

Claims (3)

A bumper absorber that is disposed on the front side of the bumper reinforcement at the front of the vehicle and extends along the vehicle width direction;
The bumper absorber is provided on the upper surface and the lower surface, and forms part of a duct. The bumper absorber is disposed so that the mounting positions on the upper surface and the lower surface of the bumper absorber are shifted in the vehicle width direction. A pair of upper and lower duct vertical wall portions that guide the traveling wind from the front grill disposed on the vehicle front side of the absorber to the heat exchanger;
A vehicle front structure having:   The vehicle front part structure according to claim 1, wherein the vertical duct vertical wall portion is integrally formed with the bumper absorber and resin.   The vehicle front part structure according to claim 1, wherein the upper and lower duct vertical wall portions are respectively provided at both ends of the bumper absorber in the vehicle width direction.

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