JPH11255153A - Vehicular bonnet structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the structure of a vehicular bonnet having the mounting position of a striker set rearward from the front end by a specific quantity composed so that collisional load may not be transmitted to the hinge mounting position. SOLUTION: Among a plural number of projected portions, an outer projected portion 18 extending in the longitudinal direction of a body and a connection projected portion 19 are formed with a central recessed portion 26 (a central fragile portion) conforming to a bend line L virtually set in the body width direction at the central position in the longitudinal direction of the body. The forward position of a front projected portion 16 provided with a striker 23 is formed with a tip recessed portion 27 (a tip fragile portion) extending toward the body width in the central position in a circular arc shape R.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonnet structure for a vehicle, and more particularly to a bonnet structure excellent in shock absorption in a frontal collision.

[0002]

2. Description of the Related Art Conventionally, a hood is provided at a front portion of a vehicle so as to open and close via a hinge so as to cover an engine room. In general, when a collision load is input from the front when a frontal collision is applied to the bonnet, a large load is transmitted to the hinge mounting position, so that the hinge mounting position is damaged and the bonnet retreats to solve the problem. A fragile portion extending in the vehicle width direction is formed at the center of the bonnet in the vehicle front-rear direction so that the hood is bent outward to prevent the load at the time of collision from being transmitted to the hinge mounting position (Japanese Patent Laid-Open No. 8-58624). Reference).

[0003]

By the way, in recent years, there has been adopted a configuration in which the front end of the bonnet is largely inclined downward and forward due to the design requirements of the vehicle. In such a configuration, the shroud upper member to which the radiator and the bonnet striker are fixed is arranged at a position slightly rearward from the tip of the bonnet in order to secure a storage space for the radiator. The position of the bonnet is inevitably located slightly behind the tip of the hood.

Therefore, in a vehicle such as a minivan, in which the length of the bonnet tends to be particularly short, even if the fragile portion extending in the vehicle width direction is simply provided at the central portion in the vehicle front-rear direction as described above, the fragile portion is not removed. It might not work.

In other words, when the bonnet length is short, the rigidity is high, so that bending and deformation itself are required.
When the distance between the striker and the tip of the bonnet is long and offset, it becomes more difficult than a general bonnet, and the striker acts as a restricting means to restrict the deformation of the bonnet. there were.

In detail, the striker is located at a position between the tip of the bonnet serving as a load input point and a hinge mounting position serving as a point for supporting the load. There has been a problem in that upward deformation is restricted, and an excessive impact load acts on the hinge mounting position.

The present invention has been conceived in order to solve the above-mentioned problem. Even when the striker is set at a predetermined distance behind the bonnet tip, an excessive collision load is transmitted to the hinge mounting position. It is an object of the present invention to provide a hood structure of a vehicle configured to prevent the bonnet from being generated.

[0008]

According to the first aspect of the present invention,
It is arranged so as to cover the engine room at the front of the vehicle, the front is detachably locked to the vehicle body via a striker,
In a bonnet structure of a vehicle having a rear end pivotally attached to a vehicle body via a hinge, the bonnet has a position between the striker and the hinge, and a position substantially at the center of the hood in the vehicle longitudinal direction. When a predetermined longitudinal load is input, the central fragile portion that bends and deforms the bonnet upward is formed, and a predetermined longitudinal load is also input to the tip between the tip of the bonnet and the striker. In this case, a fragile tip portion for bending and deforming the tip portion downward is formed.

According to a second aspect of the present invention, in the vehicle bonnet structure according to the first aspect, the bonnet is constituted by an inner panel and an outer panel, and the central weak portion is
The inner panel is formed as a concave portion formed linearly in the vehicle width direction, and the weakened end portion is located at a position forward of the striker and extends in an arc shape in the vehicle width direction so as to surround the striker. It is characterized by being formed in.

According to a third aspect of the present invention, in the bonnet structure for a vehicle according to the first aspect, a reinforcing means for increasing the rigidity of the inner panel is provided adjacent to the rear portion of the weakened tip portion, and the striker is provided on the reinforcing means. Is fixed.

[0011]

According to the first aspect of the present invention, even when the striker is mounted at a position behind the front end of the bonnet by a predetermined distance, an impact load of a predetermined amount or more is input to the front end of the bonnet at the time of collision. Then, the weak point of the tip is bent downward, so that the position of the striker is changed to the tip of the bonnet and becomes a load input point.Therefore, the striker does not act as a deformation restricting means. Since there is no member that restricts deformation before the hinge mounting position to support, the central fragile part can function efficiently and the bonnet can be bent outward and deformed. Can not be transmitted.

According to the second aspect of the invention, the central fragile portion and the distal fragile portion are both formed by the concave portions provided in the inner panel, so that the hood is increased in rigidity in the vehicle width direction. The effect of item 1 is obtained. Furthermore, by forming the fragile tip portion in an arc shape surrounding the striker at a position ahead of the striker, it can respond to forward collisions in all directions, and even in the case of offset collision from diagonally forward, the function of the fragile tip portion Can be generated.

According to the third aspect of the present invention, since the reinforcing member is provided behind the weakened distal end portion, the stress can be surely concentrated on the weakened distal end portion, and the distal end portion of the bonnet can be reliably moved downward. Can be folded.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of a vehicle V employing the present invention. At the front of the vehicle V, there is provided a bonnet 1 inclined downward and forward, and at the side of the hood, a front fender 2 constituting the front side surface of the vehicle V, and a vehicle body behind the front fender 2. A front door 3 and a rear door 4 are provided to be openable and closable.
Further, a rear fender 5 is provided behind the rear door 4.

At the rear of the hood 1, a front windshield 6 is provided so as to be inclined upward and rearward, and at the upper part of the vehicle V, a roof panel 7 extending rearward from the upper end of the front windshield 6 is provided.

A front pillar 8 is arranged on the side of the front window glass 7 so as to connect the front fender 2 and the roof panel 7, and a center pillar (not shown) is provided between the front door 3 and the rear door 4. A rear pillar (not shown) is provided between the rear door 4 and the rear fender 5.
Each is arranged so as to connect the side sill 9 and the roof panel 7.

The front door 3 and the rear door 4 are provided with window glasses 10, 11 which can be moved up and down, respectively, as door sashes 3a,
3b, 4a and 4b are provided in a state of being supported by the front door 3 and the rear door 4, before and after the windshields 10 and 11, respectively, a front corner windshield 12 and a rear corner windshield 13 fixed to the vehicle body are provided. Have been.

Next, the detailed structure of the hood to which the present invention is applied will be described with reference to FIG. The bonnet 1 is formed by joining an outer panel 14 forming an outer surface of a vehicle and an inner panel 15 forming a side surface of an engine room. Is set long. Of these, inner panel 1
5 has various convex portions, bent portions, attachment portions, and the like in order to have a function as a skeleton of the bonnet 1.

Of these, the protruding portions are a front protruding portion 16 extending in the vehicle width direction at the front end position, a rear end protruding portion 17 extending in the vehicle width direction at the rear end position, and both ends of these both protruding portions in the vehicle longitudinal direction. A plurality of connecting protrusions 19 extending and connecting diagonally outward in the front-rear direction of the vehicle body at a central position between the front recess 16 and the rear protrusion 17; And an auxiliary connecting protrusion 20 that further extends in the vehicle width direction to connect. The rigidity of the bonnet is increased by forming the convex portion of the inner panel in a well shape as described above.

At the center of the front end convex portion 16, a striker 23 is engaged with a latch mechanism 22 (shown in FIG. 3) provided on a shroud upper member 21 (shown in FIG. 3) extending in the vehicle width direction. But the tip 1a of the bonnet 1
A hinge attachment portion 25 is provided at a position separated rearward from the rear side and is attached to a hinge 24 (shown in FIG. 4) serving as a rotation fulcrum for opening and closing the hood with respect to the vehicle body at both end positions of the rear convex portion 17. Have been.

Of the plurality of projections, an outer projection 18 extending in the vehicle longitudinal direction and a connecting projection 19 are provided on a bending line L virtually set in the vehicle width direction at a center position in the vehicle longitudinal direction. A matching central concave portion 26 (central weak portion) is formed, and when a load in the vehicle front-rear direction acts on the bonnet 1 at the time of a front collision, the bonnet 1 is configured to deform starting from the central concave portion 26. The bending line L is set at a substantially central position between the striker 23 and the hinge attachment portion 25 when viewed in the front-rear direction of the vehicle body, and is shifted from the auxiliary connection projection 20 in the front-rear direction. With this setting, the bending deformation of the bonnet 1 can be reliably obtained at the time of a front collision.

Front projection 1 provided with striker 23
6, a front end recess 27 (a front end weak portion) extending in the vehicle width direction is formed at the center position, and when a load in the vehicle front-rear direction is applied at the initial stage of the collision, the bonnet front end 1a starts from the front end recess 27. , It is configured to bend downward. This tip recess 27 is slightly
3 is formed in an arc shape R centered on the rear.

The striker 23 at the front end of the hood 1
The detailed structure of the mounting structure and the tip recess 27 will be described with reference to the cross-sectional view of FIG. A striker rain 28 to which a striker 23 is fixed is joined to the inner surface of the front end protrusion 16 provided on the inner panel 15 of the bonnet. A front stiffener 29 to be joined is arranged. A front end concave portion 27 is formed in front of the front end joint portion 29a of the front stiffener 29, and a space portion 30 is formed in front of the front end concave portion 27 between the front stiffener 29 and the outer panel 14.
The inner panel 15 and the outer panel 14 are joined at the bonnet tip 1a. A filler 31 is interposed between the outer panel 14 and the front recess 27, and between the outer panel 14 and the front stiffener 29.
4 has increased surface rigidity.

The striker 23 projects downward and is engaged with a latch mechanism 22 provided in front of a shroud upper member 21 which is a vehicle body member extending in the vehicle width direction.

The operation of the bonnet structure having the above-described structure at the time of collision will be described with reference to FIG. In FIG. 4, 1 is a hood, 6 is a front window glass, 21 is a shroud upper member, 23 is a striker, 24 is a hinge, 26 is a central recess, 27 is a tip recess,
M is a collision object.

In the initial stage of the collision (A), the collision object M comes into contact with the front end 1a of the hood 1 which is arranged forward, the collision load F is transmitted to the striker 23, and the stress is also concentrated on the front recess 27. Starting from the tip recess 27, the tip 1a of the bonnet is bent downward (B).

When the collision object M further enters, a load acts on the shroud upper member 21 and the collision load F is transmitted to the hinge 24, so that the bonnet 1 starts from the central concave portion 26 and has a substantially rectangular shape. (C). As a result, stress concentration at the attachment position of the hinge 24 can be reduced.

As described above, even if the bonnet length is short and the position where the striker 23 is provided is separated from the leading end 1a of the bonnet, since the leading end concave portion 27 is provided, the striker 23 is surely provided at the beginning of collision. Since the leading end portion is bent downward, a load is transmitted to the shroud upper member 21 and the bonnet 1 can be deformed starting from the central concave portion 26.
The stress concentration at the attachment position of the hinge 24 can be reduced, and the retraction of the bonnet 1 can be prevented.

Further, by connecting the front end and the rear end of the front end convex portion 16 with the front stiffener 29, the rigidity of the mounting portion of the striker 23 is increased, and the stress can be surely concentrated on the front end concave portion 27.

Further, since the distal recess 27 is formed in an arc shape as described above, it is possible to cope with a forward collision in all directions, and to reliably perform the distal recess 2 even at the time of an offset collision or the like.
7 functions can be generated.

The present invention is not limited only to these embodiments, and can be applied without departing from the spirit thereof. For example, it is possible to form a fragile portion by providing a notch instead of a concave portion. Alternatively, a plurality of central concave portions may be provided in the front-rear direction.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a vehicle employing a structure of the present invention.

FIG. 2 is a detailed plan view of the bonnet viewed from the engine room side.

FIG. 3 is a sectional view showing an AA section in FIG. 2;

FIG. 4 is a schematic view showing a behavior of the bonnet at the time of collision.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bonnet 23 Striker 25 Hinge attaching part 26 Central concave part (central weak part) 27 Tip concave part (tip weak part)

Claims (3)

[Claims] 1. A front part of a vehicle is disposed so as to cover an engine room, a front part is detachably locked to a vehicle body via a striker, and a rear end part is swingably pivoted to the vehicle body via a hinge. In the hood structure of the worn vehicle, the bonnet is moved upward when a predetermined longitudinal load is input between the striker and the hinge and at a position substantially at the center of the hood in the longitudinal direction of the vehicle. A central fragile portion that bends and deforms is formed, and a distal fragile portion that bends and deforms the distal end portion downward when a predetermined longitudinal load is input is also provided at the distal end portion between the distal end of the bonnet and the striker. A bonnet structure for a vehicle, wherein the bonnet structure is formed. 2. The hood comprises an inner panel and an outer panel, and the central weak portion is formed as a concave portion formed linearly in the vehicle width direction on the inner panel.
2. The bonnet structure for a vehicle according to claim 1, wherein the weakened end portion is formed in the inner panel as a concave portion extending in an arc shape in a vehicle width direction so as to surround the striker at a position forward of the striker. 3. A bonnet structure for a vehicle according to claim 1, wherein a reinforcing means for increasing the rigidity of the inner panel is provided close to the rear end of said weakened portion, and said striker is fixed to said reinforcing means. .