JP2002145113A - Front body structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front body structure of a vehicle capable of securely lifting up and loading an obstacle on a hood, absorbing a shock acting on it, and suppressing the damage given to the obstacle to small extent when the vehicle collides against the obstacle. SOLUTION: In the front part vehicle body structure of the vehicle provided with a bumper in a front lower part of the hood 1 extending forward, the bumper is provided with a member 8 in the direction of vehicle width attached to front ends of right and left front side frames 5, a protruding member 11 whose tip protrudes forward from the member 8 in the direction of vehicle width is attached to front parts of the right and left front side frames 5 through a stay 10 in a lower part of the bumper, and an energy absorbing part 10e whose front part is connected with the protruding member 11 is provided in the stay 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front body structure of a vehicle provided with a bumper at a lower front portion of a hood extending forward.

[0002]

2. Description of the Related Art A front vehicle body structure of a vehicle protects a passenger by absorbing an impact acting on the vehicle body when the vehicle collides with an obstacle (pedestrian or the like) and protects a passenger. Must also be configured to absorb and protect

[0003] As a front body structure of such a vehicle, Japanese Patent Laid-Open Publication No. 6-72284 discloses an airbag housed at the front end of the vehicle and deployed in the traveling direction of the vehicle, deployment driving means for deploying and driving the airbag, A vehicle front obstacle detecting means for detecting an obstacle in front of the vehicle, a vehicle running state detecting means for detecting a running state of the vehicle, and a vehicle front obstacle based on outputs of the vehicle front obstacle detecting means and the vehicle running state detecting means. There is disclosed an apparatus provided with collision prediction means for determining the degree of collision danger with an object. According to such a configuration, the collision prediction means is based on the output of the vehicle front obstacle detection means and the vehicle traveling state detection means. To determine the risk of collision with obstacles ahead of the vehicle, such as pedestrians and bicycles, to predict collision with the obstacles. If a collision with the obstacle ahead of the vehicle is predicted, the deployment drive means is excited. Car The description states that the airbag is deployed in the traveling direction, thereby preventing pedestrians, bicycles, etc. from directly contacting the vehicle body or being caught in the lower part of the vehicle body and protecting them. Have been. However, such a configuration requires an airbag, a large number of detection devices, and a control system, which complicates the structure and may cause a malfunction.

Japanese Patent Application Laid-Open No. 11-1149 discloses that
A bumper for a vehicle in which a shock absorbing material is arranged between an amateur (bumper reinforcement) and a fascia (bumper face). And a plate in which a plate member having ribs extending substantially in the longitudinal direction is interposed on the divided surface of the shock absorbing material to fix the divided bodies of the shock absorbing material to each other. According to this configuration, the impact load locally applied to the bumper at the time of collision is dispersed over the entire length of the plate member in the longitudinal direction of the armature (bumper reinforcement). Bumper reinforcement can be prevented from breaking, and the plate member is reinforced by ribs extending substantially in the longitudinal direction. Since, it is possible to reduce the weight while ensuring the strength as compared with conventional over-rider, the contents of the have been described. However, in this configuration,
No consideration is given to absorbing and protecting the impact exerted on the impacted obstacle.

[0005]

SUMMARY OF THE INVENTION An object of the present application is to ensure that when an obstacle collides with an obstacle, the obstacle is reliably placed on the hood and the shock acting on the obstacle is absorbed, thereby preventing damage to the obstacle. It is an object of the present invention to provide a front vehicle body structure of a vehicle that can reduce the vehicle body size.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a projecting member is attached to the front portions of left and right front side frames via stays so that the front end projects forward of a vehicle width direction member at a lower portion of a bumper. Has an energy absorbing portion whose front portion is connected to the protruding member.

Specifically, the present invention relates to a front body structure of a vehicle having a front lower portion of a bonnet extending forward, wherein the bumpers are mounted on front ends of left and right front side frames in a vehicle width direction. At the lower part of the bumper, a projecting member whose front end projects forward from the vehicle width direction member is attached to the front of the left and right front side frames via a stay, and the front of the stay is attached to the projecting member. It is characterized in that an energy absorbing portion to be connected is provided.

According to the above configuration, when the front portion of the vehicle collides with an obstacle, the projecting member first strikes the lower portion of the obstacle, inclines the obstacle toward the vehicle body, and then is positioned obliquely rearward of the projecting member. Since the vehicle width direction member hits an obstacle inclined to the vehicle body side, the obstacle is securely mounted on the bonnet, and the protruding member is connected to the energy absorbing portion of the stay, and the energy absorbing portion Will absorb the impact at the time of the collision, so that the load acting on the obstacle from the projecting member is reduced, and as a result, the damage to the obstacle is extremely small. Also,
With a simple configuration in which an energy absorbing portion is provided on a stay for attaching the protruding member, safety improvement in the event of such a collision is achieved.

Here, the energy absorbing portion may be formed of a bellows-shaped plate material in which irregularities are alternately arranged in the front-rear direction. According to this configuration, since the energy absorbing portion is configured in a bellows shape, when the projecting member hits an obstacle, the bellows-shaped energy absorbing portion is easily compressed and the projecting member moves rearward, thereby causing the obstacle to move. Is effectively absorbed.

The stay may have a configuration in which an upper portion is sandwiched between a front end of the front side frame and a vehicle width direction member. According to this configuration, the stay is also fixed when the vehicle width direction member is attached to the front side frame, and a special member for attaching the stay is unnecessary, so that the stay can be easily and inexpensively mounted. Becomes

[0011]

As described above, according to the present invention,
When the front part of the vehicle collides with an obstacle, the projecting member first hits the lower part of the obstacle and tilts the obstacle toward the vehicle body, and then the vehicle width direction member located diagonally behind the projecting member tilts toward the vehicle body. Because it will hit an obstacle, the obstacle will be surely put on the hood,
The protruding member is connected to the energy absorbing portion of the stay, and the energy absorbing portion absorbs the impact at the time of collision, so that the load acting on the obstacle from the protruding member is reduced, and as a result, the obstacle is prevented. Damage to objects can be kept extremely small. Further, with a simple configuration in which a stay for attaching the protruding member is provided with an energy absorbing portion, it is possible to achieve an improvement in safety at the time of such a collision.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a front body structure of a vehicle according to an embodiment of the present invention.

In this front body structure, a bonnet 1 extending forward of a windshield (not shown) and covering an engine room, a grill 2 extending downward from the front end of the hood 1 to form a front surface of the vehicle, and a lower end of the grill 2 Subsequently, the outer surface of the vehicle is configured by the bumper face 3 including the upper protruding portion 3a protruding forward and the lower protruding portion 3b below the upper protruding portion 3a. A hood reinforcement 4 for reinforcing the hood 1 is provided on the front side of the hood 1 of the hood 1 which indicates a front tire.

As shown in FIGS. 1 and 2, the rear side of the upper protruding portion 3a of the bumper face 3 has a truncated quadrangular pyramid-shaped crash which absorbs the impact at the time of collision at the front ends of the left and right front side frames 5, 5. The cans 6 and 6 are attached by bolts and nuts, and a support member 7 is attached to the front end of each crash can 6 by bolts. Both ends of a bumper reinforcement 8 extending in the vehicle width direction by left and right support members 7 and 7. Has been supported. Here, the crash cans 6, 6 and the support members 7,
7 and the bumper reinforcement 8 constitute a vehicle width direction member. In this front body structure, as shown in FIG. 1, a shock absorbing material 9 made of urethane foam is attached to the front surface of the bumper reinforcement 8, and the shock absorbing material 9 is attached to the upper protrusion 3a of the bumper face 3. Is arranged behind.

As shown in FIGS. 1 to 3, the structure behind the lower projecting portion 3b of the bumper face 3 includes stays 10, 10 at the lower portions of the left and right front side frames 5, 5 and the lower portions of the support members 7, 7. Are mounted and fixed, and their stays 1
The projecting members 11 extending in the vehicle width direction are supported by 0 and 10. As shown in FIG. 4, the stay 10 is formed of a metal plate, and has a main body 10a inclined forward and downward, a pair of first mounting portions 10b and 10b extending upward from both upper ends of the main body 10a, and a main body. A pair of side plate portions 10 extending upward from both sides of the portion 10a
c, 10c, second mounting portions 10d, 10d bent outward at the upper ends of the side plate portions 10c, 10c, and the main body portion 10c.
The energy absorbing portion 10e has a U-shaped cross-section and is formed in a bellows shape extending forward and backward from the lower end of “a” and having irregularities alternately arranged in the front-rear direction. As shown in FIG. 3, the stay 10 is configured such that the first mounting portions 10 b, 10 b have the mounting plate 6 a of the crash can 6 and the front end plate 5 of the front side frame 5.
a and bolts 12, 12 inserted from the rear side of the front end plate portion 5 a of the front side frame 5.
Are bolt insertion holes 10f, 1 of the first mounting portions 10b, 10b.
0f,... And the mounting plate 6a of the crash can 6
The front side is fastened by nuts 13, 13, and the second mounting portions 10 d, 10 d are fixed to the vehicle body by welding or bolting to the lower portion of the support member 7. The protruding member 11 is attached to the stay 10 by welding, bolting, or the like to the tip of the energy absorbing unit 10e. In this front body structure, FIG.
As shown in FIG. 3, the projecting member 11 is arranged behind the lower projecting portion 3b of the bumper face 3. The projecting member 11 is arranged to project forward from the bumper reinforcement 8.

According to the front body structure having the above structure, when the front portion of the vehicle collides with the obstacle, first, the projecting member 11 hits the lower part of the obstacle via the lower projecting portion 3b of the bumper face 3, and the obstacle 11 Will tilt toward the vehicle body. At this time, the bellows-shaped energy absorbing portion 10e is easily compressed, and the projecting member 11 moves rearward, whereby the impact acting on the obstacle is effectively absorbed, and the projecting member acts on the obstacle. The load will be reduced.
At the same time, the shock absorber 9 also hits the obstacle via the upper protruding portion 3a of the bumper face 3.
Since the shock absorbing material 9 is formed of urethane foam resin which is easy to compress, the influence of the force acting on the obstacle is small. Next, when the shock absorbing material 9 is sufficiently compressed, the bumper reinforcement 8 hits an obstacle via the compressed shock absorbing material 9 and the upper protruding portion 3a of the bumper face 3, and the obstacle inclined to the vehicle body side. The object is surely placed on the hood 1. In this way, damage to obstacles is kept very small.

Further, with a simple configuration in which the energy absorbing portion 10e is provided on the stay 10 for attaching the protruding member 11, safety in such a collision can be improved.

Further, the stay 10 includes a first mounting portion 10.
b, 10b are front end plate portions 5a of the front side frame 5.
And the mounting plate portion 6a of the crash can 6, and the second mounting portions 10d, 10d are fixed to the vehicle body by welding or the like to the lower portion of the support member 7, so that the crash can 6 is moved forward. The first attachment portions 10b, 10b are also attached and fixed when attached to the side frame 5, and a special member for attaching the stay is not required. Therefore, the attachment of the stay 10 to the vehicle body is easy and inexpensive. It becomes something.

[Brief description of the drawings]

FIG. 1 is a side view showing a front vehicle body structure of a vehicle according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of FIG.

FIG. 3 is an enlarged side view of a main part of FIG. 1;

FIG. 4 is a perspective view of a stay used for a front vehicle body structure of the vehicle according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bonnet 2 Grill 3 Bumper face 3a Upper protruding part 3b Lower protruding part 4 Bonnet reinforcement 5 Front side frame 5a Front end plate part 6 Crash can 6a Mounting plate part 7 Support member 8 Bumper reinforcement 9 Shock absorbing material 10 Stay 10a Main body 10b First mounting portion 10c Side plate 10d Second mounting portion 10e Energy absorbing portion 10f Bolt insertion hole 11 Projecting member 12 Bolt 13 Nut T Front tire

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Kashiwada 2-4-1 Niho, Minami-ku, Hiroshima-shi, Hiroshima F-term (reference) in Matsuda Sangyo Co., Ltd. 3D003 AA01 AA05 BB02 CA02 CA18 DA14

Claims (3)

[Claims] 1. A front body structure of a vehicle having a front lower portion of a hood extending forward, wherein the bumper includes a vehicle width direction member attached to front ends of left and right front side frames. A projecting member having a tip projecting forward from the vehicle width direction member is attached to a front portion of the left and right front side frames via a stay, and the stay has an energy absorbing portion having a front portion connected to the projecting member. A front body structure of a vehicle, characterized by being provided. 2. The front body structure of a vehicle according to claim 1, wherein the energy absorbing portion is formed of a bellows-shaped plate member having irregularities alternately arranged in the front-rear direction. 3. The front body of a vehicle according to claim 1, wherein an upper portion of the stay is sandwiched between a front end of the front side frame and the vehicle width direction member. Construction.