JP2012166766A - Vehicle front structure - Google Patents

Abstract

An object of the present invention is to improve impact absorption performance by suppressing buckling at a bent portion of a lower absorber.
A lower portion having a bent portion that is disposed at a lower portion of a front portion of a vehicle so as to extend in the vehicle front-rear direction, is attached to a radiator support lower at a rear end portion of the vehicle, and bends in a convex manner upward of the vehicle. It has an absorber 10 and a grill 12 that is provided on the convex side of the bent portion 10B and guides wind during running into the engine compartment 16. By providing the grill 12 at the bent portion 10B of the lower absorber 10, the bent portion 10B is reinforced.
[Selection] Figure 2

Description

  The present invention relates to a vehicle front structure.

  The lower part of the front part of the vehicle is arranged so as to extend in the front-rear direction of the vehicle, and is attached to the vehicle in the rear part, and has a plate part (lower absorber) provided with a reinforcing part in the front part, A vehicle pedestrian protection device configured to protect a leg portion of a pedestrian that has collided with the front surface of the vehicle at the front end portion of the plate portion is disclosed (Patent Document). 1).

JP 2010-95044 A

  However, as in the conventional example described above, when the rear portion of the lower absorber (plate portion) is attached to the vehicle and the lower absorber is bent in a dogleg shape in a side view of the vehicle, the front of the lower absorber is When a collision load is input from the front of the vehicle to the end, it is considered that the lower absorber buckles convexly upward of the vehicle starting from the bent portion.

  In view of the above fact, an object of the present invention is to suppress the buckling at the bent portion of the lower absorber and improve the shock absorbing performance.

  According to a first aspect of the present invention, there is provided a lower absorber that is disposed at a lower portion of the front portion of the vehicle so as to extend in the vehicle front-rear direction, is attached to the vehicle body at a rear end portion of the vehicle, and has a bent portion that bends upward in the vehicle. And a grill that is provided on the convex side of the bent portion and guides wind during traveling into the engine compartment.

  In the vehicle front structure according to claim 1, a grill for guiding wind during traveling into the engine compartment is provided on the convex side of the bent portion of the lower absorber, and the bent portion is reinforced, so that During a frontal collision, when a collision load is input from the front of the vehicle to the front end of the lower absorber, the lower absorber is prevented from buckling at the bent portion. Can be increased.

  According to a second aspect of the present invention, in the vehicle front structure according to the first aspect, a bumper reinforcement extending in the vehicle width direction is disposed close to the vehicle upper side of the grill.

  In the vehicle front structure according to claim 2, when the lower absorber receives a collision load from the front of the vehicle, the collision load transmitted from the lower absorber to the grill is further transmitted from the grill to the bumper reinforcement. Is done. Thereby, since the movement of the grill to the vehicle upper side can be suppressed by bumper reinforcement, it is possible to further suppress the lower absorber from buckling at the bent portion.

  According to a third aspect of the present invention, in the vehicle front portion structure according to the first or second aspect, the grill is integrally formed with the lower absorber.

  In the vehicle front structure according to the third aspect, since the grill is integrally formed with the lower absorber, the number of parts is reduced as compared with the case where they are formed separately from each other. For this reason, cost reduction, the improvement of the assembly | attachment workability | operativity to a vehicle, and the improvement of installation precision can be aimed at.

  As described above, according to the vehicle front portion structure according to claim 1 of the present invention, it is possible to suppress the buckling at the bent portion of the lower absorber and to improve the shock absorbing performance. An effect is obtained.

  According to the vehicle front structure according to the second aspect, it is possible to obtain an excellent effect that the lower absorber can be further suppressed from buckling at the bent portion.

  According to the vehicle front structure according to the third aspect, it is possible to obtain an excellent effect that it is possible to reduce the cost, improve the workability of assembling to the vehicle, and improve the installation accuracy.

It is a perspective view which shows a vehicle front part. It is sectional drawing which shows a vehicle front part structure. It is a perspective view which shows a lower absorber and a grill. It is sectional drawing which shows the modification of a lower absorber and a grill.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 and 2, the vehicle front structure S according to this embodiment includes a lower absorber 10 and a grill 12. The lower absorber 10 and the grill 12 are molded products made of, for example, a synthetic resin.

  2 and 3, the lower absorber 10 is disposed at the lower portion of the front portion of the vehicle so as to extend in the vehicle front-rear direction, and is attached to a radiator support lower 14 as an example of a vehicle body at the vehicle rear end portion 10R. As shown in FIG. 3, the contour of the vehicle front end portion 10F of the lower absorber 10 is formed in an arc shape in which the central portion in the vehicle width direction protrudes most forward of the vehicle, for example, along the contour of the vehicle front portion. Yes. The contour of the vehicle rear end portion 10R is formed, for example, in a straight line along the radiator support lower 14 extending in the vehicle width direction.

  The lower absorber 10 has a bent portion 10B that is bent convexly upward of the vehicle. In addition, a region 10A on the vehicle front side of the bent portion 10B in the lower absorber 10 is configured to be substantially horizontal, and a region 10C on the vehicle rear side of the bent portion 10B is inclined obliquely downward toward the rear of the vehicle.

  In the lower absorber 10, for example, a plurality of claw portions 10E are erected on the convex side (upper surface) of the bent portion 10B. A lower surface side of the lower absorber 10 is reinforced by a rib 10D extending from the vehicle front end portion 10F to the vehicle rear end portion 10R. A plurality of ribs 10D are provided in parallel in the vehicle width direction (not shown).

  2 and 3, the grill 12 is a member that is provided on the convex side of the bent portion 10 </ b> B and guides wind during traveling into the engine compartment 16. For example, the grill 12 is integrally formed with the lower absorber 10. A condenser 20 and a radiator core 22 supported by a radiator support lower 14 and a radiator support upper 18 are provided behind the grill 12 in the engine compartment 16. The condenser 20 is a heat exchanger for an air conditioner, and the radiator core 22 is a heat exchanger for cooling water of an engine or the like (not shown).

  For example, the grill 12 includes a plurality of vertical rails 28 in a region surrounded by a pair of left and right vertical frames 24, a horizontal frame 26 that connects the upper ends of the vertical frames 24 in the vehicle width direction, and the lower absorber 10. And the crosspiece 30 is provided. The shapes and the number of the vertical bars 28 and the horizontal bars 30 are appropriately set according to the vehicle type. The lower end portion of the vertical frame 24 is continuously connected to the lower absorber 10 from, for example, the region 10A on the vehicle front side to the region 10C on the vehicle rear side from the bent portion 10B. On the upper surface of the horizontal frame 26, a plurality of claw portions 12E are erected.

  In addition, the connection structure of the lower absorber 10 and the grill 12 is not limited to this, and the structure shown in FIG. 4 may be employed. In the example shown in FIG. 4, not only the upper horizontal frame 26 but also the lower horizontal frame 27 is provided on the grill 12. The horizontal frame 27 is connected to the bent portion 10 </ b> B of the lower absorber 10 through the connecting portion 29. The connecting portion 29 extends continuously or intermittently along the bent portion 10B. The connecting portion 29 may be made thicker, and the connecting portion 29 may be connected in a wider range from the vehicle front side region 10A to the vehicle rear side region 10C of the bent portion 10B. Moreover, you may arrange | position the some connection part extended in the vehicle front-back direction in parallel along the bending part 10B (not shown).

  As shown in FIG. 2, a bumper reinforcement 32 extending in the vehicle width direction is disposed close to the vehicle upper side of the grill 12. The bumper reinforcement 32 is a high-rigidity member that is provided at the front of the vehicle and has, for example, a substantially rectangular hollow cross section, and is attached to the front end of, for example, a side member (not shown) in the vehicle body.

  Here, the “proximity arrangement” means that, for example, the claw portion 12E of the grill 12 is slightly separated from the lower surface so as not to contact the lower surface of the bumper reinforcement 32 during normal traveling. To do. If the bent portion 10B of the lower absorber 10 is further bent upward and the grill 12 slightly moves upward in the frontal collision of the vehicle, the claw portion 12E of the grill 12 contacts the lower surface of the bumper reinforcement 32. It is like that.

  Since the upward movement of the grill 12 only needs to be suppressed by the bumper reinforcement 32 as a result, other members may be interposed in the load transmission between the bumper reinforcement 32 and the grill 12. .

  What is arranged close to the vehicle upper side of the grill 12 is not limited to the bumper reinforcement 32 and may be anything that can suppress the movement of the grill 12 to the upper side of the vehicle. In consideration, it is most preferable to use the bumper reinforcement 32 disposed at a certain height in the front part of the vehicle.

  An impact absorbing material 34 such as urethane is provided on the front surface of the bumper reinforcement 32. The bumper reinforcement 32, the shock absorber 34, and the lower absorber 10 are covered with a bumper cover 36 from the front side of the vehicle. The bumper cover 36 is formed with an opening 38 to which the grill 12 is attached. A claw portion 12E of the grill 12 is engaged with the rear end 40R of the upper wall portion 40 of the opening 38 from the vehicle rear side. A claw portion 10E of the lower absorber 10 is engaged with the rear end 42R of the lower wall portion 42 of the opening 38 from the vehicle rear side.

  The vehicle front end portion 10 </ b> F of the lower absorber 10 is located on the vehicle front side with respect to the shock absorber 34. Thereby, the collision load when the leg part (not shown) of a pedestrian collides with the front part of the vehicle is input to the lower absorber 10 before the shock absorber 34.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 3 and 4, in the vehicle front part structure S according to the present embodiment, the grill 12 is integrally formed with the lower absorber 10, so that the number of parts is smaller than in the case where they are formed separately from each other. Become. For this reason, cost reduction, the improvement of the assembly | attachment workability | operativity to a vehicle, and the improvement of a building precision can be aimed at.

  In FIG. 2, when a collision load F is input from the front of the vehicle to the vehicle front end 10 </ b> F of the lower absorber 10 at the time of a frontal collision of the vehicle, the collision load F is applied to the vehicle rear end of the lower absorber 10. 10R is transmitted to the radiator support lower 14. Since the radiator support lower 14 is a vehicle body, the reaction force R from the radiator support lower 14 acts on the lower absorber 10 toward the front of the vehicle.

  Since the lower absorber 10 has the bent portion 10B, the collision load F and the reaction force R act, so that the lower absorber 10 tries to bend further upward in the vehicle. However, in the present embodiment, the grill 12 for guiding the wind during traveling into the engine compartment 16 is provided on the convex side of the bent portion 10B of the lower absorber 10, and the bent portion 10B is reinforced, so the lower absorber 10 is restrained from buckling at the bent portion 10B.

  In particular, in the present embodiment, since the bumper reinforcement 32 extending in the vehicle width direction is disposed close to the upper side of the grill 12 in the vehicle, the lower absorber 10 tends to bend further upward in the bent portion 10B. When 12 slightly moves upward in the vehicle, the grill 12 comes into contact with the lower surface of the bumper reinforcement 32. Thereby, a part of the collision load F is transmitted to the bumper reinforcement 32. Since the bumper reinforcement 32 is a highly rigid member provided on the vehicle body, the reaction force D from the bumper reinforcement 32 acts on the grill 12 in the downward direction of the vehicle. Thereby, since the movement to the vehicle upper side of the grill 12 can be suppressed, it can suppress further that the lower absorber 10 buckles in the bending part 10B. Moreover, the impact absorption performance by the lower absorber 10 can be improved thereby.

(Other embodiments)
In the above configuration, the grill 12 is integrally formed with the lower absorber 10. However, the present invention is not limited to this, and the bent portion 10B is formed by separately molding each of them and using means such as adhesion, welding, and fastening. May be integrated.

  In addition, as an example of the vehicle body to which the vehicle rear end portion 10R of the lower absorber 10 is attached, the radiator support lower 14 has been described. However, it may be another part of the vehicle body, or may be a bracket or the like attached to the vehicle body. Good.

DESCRIPTION OF SYMBOLS 10 Lower absorber 10B Bending part 10R Vehicle rear end part 10F Vehicle front end part 12 Grill 14 Radiator support lower (vehicle body)
16 Engine compartment 32 Bumper reinforcement S Vehicle front structure

Claims (3)

A lower absorber that is disposed at a lower portion of the vehicle front portion so as to extend in the vehicle front-rear direction, is attached to the vehicle body at a vehicle rear end portion, and has a bent portion that bends in a convex manner upward of the vehicle;
A grill that is provided on the convex side of the bent portion and guides wind during running into the engine compartment;
A vehicle front structure having:   The vehicle front part structure according to claim 1, wherein a bumper reinforcement extending in a vehicle width direction is disposed close to a vehicle upper side of the grill.   The vehicle front structure according to claim 1, wherein the grill is integrally formed with the lower absorber.

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