JP6237171B2 - Vehicle hood structure - Google Patents

Description

  The present invention relates to a vehicle hood structure.

  As a vehicle hood structure, a vehicle hood disclosed in, for example, Japanese Patent Application Laid-Open No. 2008-24192 (Patent Document 1) can satisfy both the basic performance of the hood and the pedestrian protection performance.

  In Patent Document 1, in an automobile hood in which an outer panel and an inner panel are joined at their respective peripheral portions, and a space is formed between both panels, the inner panel is joined to an outer peripheral portion of the outer panel. A convex shape having an inner peripheral edge, a frame recess formed continuously with the inner peripheral edge and forming a space between the outer peripheral panel, and a joint surface that is bonded to the outer panel at a position closer to the panel center than the frame recess. A plurality of beads and a concave portion that forms a space portion between adjacent beads, and the bead has an inclined surface continuous from the joint surface to the bottom surface of the frame concave portion at at least one of both end portions in the longitudinal direction. What has the notch part notched so that a deformation | transformation load may reduce at least one part is disclosed.

  With such a structure, the inner panel has a space (frame recess and recess) between the outer panel and the bending rigidity of the automobile hood is ensured. Further, since the bead of the inner panel has a joint surface that joins the outer panel, the rigidity of the outer panel is ensured. Furthermore, since the bead has a notch portion that is notched so as to reduce the deformation load at the end portion, even when the convex portion collides with the peripheral portion of the automobile hood, the bead end portion is crushed and deformed. It becomes easy to do. As a result, the crushing deformation load of the automobile hood is reduced and the stroke is secured, so that the secondary collision acceleration is reduced.

JP 2008-24192A

  However, the conventional technology has a problem in that the pedestrian protection effect is reduced at a location away from the notch.

  Therefore, an object of the present invention is to provide a vehicle hood structure with improved pedestrian protection performance than before.

In order to solve the above problems and achieve the object, the invention described in claim 1 includes an outer panel that constitutes a vehicle outer surface of a vehicle hood, and an inner panel disposed inside the outer panel. In the vehicle hood structure, a plurality of openings provided by partially cutting out the inner panel, a skeleton extending in the vehicle front-rear direction and a vehicle width direction between the plurality of openings, and the middle of the skeleton And a lower bead having a convex shape toward the vehicle lower direction, wherein at least one of the lower beads is an intersection of the skeleton extending in the vehicle longitudinal direction and the skeleton extending in the vehicle width direction. are formed between the two said lower bead in the vehicle width direction at the intersection of two of said framework and extending in the longitudinal direction of the vehicle in the skeleton and the outer side in the vehicle width direction and extending in the vehicle width direction In the extension of the backbone that extends, characterized in that it is formed so as to bridge the opening portions on both sides of the skeleton extending in a longitudinal direction of the vehicle.

According to a second aspect of the present invention, in the hood structure for a vehicle according to the first aspect, the lower bead is formed between each of the intersecting portion and the end of the skeleton. .

The invention described in claim 3
The vehicle hood structure according to claim 1 or 2,
The lower bead is formed to bridge the openings on both sides of the skeleton to be formed.

  According to the first aspect of the present invention, when a pedestrian collides above the vehicle hood, the vehicle hood can be easily deformed downward to reduce the influence on the pedestrian compared to the conventional structure. it can.

  According to the invention described in claim 2, the influence on the pedestrian can be reduced in a wide range of the vehicle hood.

  According to the invention described in claim 3, the downward deformation of the vehicle hood becomes easier, and the influence on the pedestrian can be further reduced.

It is a bottom view showing the hood structure for vehicles concerning one embodiment of the present invention. It is the elements on larger scale of the hood structure for vehicles of FIG. It is the sectional view on the AA line of the vehicle hood structure of FIG.

  Hereinafter, a vehicle hood structure according to an embodiment of the present invention will be described with reference to FIGS. In this specification, “upper” and “lower” represent directions in a state where the vehicle hood is closed.

  The vehicle hood 1 is composed of an outer panel 2 constituting the outer surface of the vehicle, and an inner panel 3 disposed inside the outer panel 2. The outer panel 2 and the inner panel 3 have a cross-sectional structure in which a space portion is formed between predetermined positions of both the panels while being joined at the respective peripheral edge portions.

  The outer panel 2 has a predetermined curvature and is made of a lightweight and high-tensile metal plate. Similarly, the inner panel 3 is made of a lightweight and high-tensile metal plate. The metal is preferably steel or an aluminum alloy.

  The thickness of the inner panel 3 is selected according to the bending rigidity determined by the type of vehicle in which the vehicle hood 1 is used, and the relative speed between the head and the vehicle hood 1 in the event of a pedestrian head collision. It affects the inertial force generated by. Therefore, by optimizing the plate thickness, the acceleration at the time of the primary collision increases, a sufficient energy absorption amount is ensured, and the pedestrian protection performance of the vehicle hood 1 can be improved.

  The inner panel 3 includes a plurality of openings 10 that are partially cut out near the center thereof, a skeleton 11 that extends between the plurality of openings 10 in the vehicle front-rear direction and the vehicle width direction, A lower bead 12 formed in the middle and having a convex shape toward the vehicle lower direction and an upper bead 13 extending in the vehicle width direction and having a convex shape in the vehicle upper direction are provided.

  The upper bead 13 is provided on the outer frame portion 3a of the inner panel 3 and the plurality of skeletons 11 so as to form a line in the vehicle width direction. Absorbs the impact.

  The lower bead 12 is adjacent to a portion where the skeleton 11a extending in the vehicle front-rear direction and the skeleton 11b extending in the vehicle width direction intersect each other between the openings 10 and 10 and one of the end portions of the both skeletons 11a and 11b. Each is formed between each other. The lower bead 12 is also formed so as to bridge the openings 10 and 10 on both sides of the skeleton 11 to be formed. The lower beads 12 are provided on the plurality of skeletons 11a so as to form a line in the vehicle width direction and are provided on the plurality of skeletons 11b. Absorbs.

  The inner panel 3 has a weakened strength at the location of the opening 10, but the inner edge of the opening 10 is formed with a plurality of adhesive surfaces 10 a protruding in the opening direction. Since 2 and the inner panel 3 are bonded, they are reinforced.

  With the above configuration, when the vehicle comes into contact with a pedestrian, when the pedestrian's body part, particularly the head, etc. comes into contact with the vehicle hood 1 from above, the contact location is, for example, one skeleton 11a or If it is in the vicinity of the lower bead 12 provided in 11b, the lower bead 12 can be easily bent downward and the vehicle hood 1 can absorb the impact. Further, if the contact location is in the vicinity of the portion where the skeleton 11a and the skeleton 11b intersect, the three lower beads 12 around the portion can be easily bent downward to absorb the impact.

  The inner panel 3 is provided with a plurality of openings 10 to reduce the weight thereof. The portion remaining after being removed as the opening 10 constitutes the inner panel 3 as the skeleton 11. The vehicle hood 1 needs a certain degree of rigidity to perform the opening / closing operation. However, since the strength of the skeleton 11 is not sufficient with a flat surface shape, it is possible to form a beam shape with both sides facing up to a wall surface. Ensure strength. When the pedestrian comes into contact with the vehicle hood 1 from above at the time of a collision, the impact on the pedestrian increases if the strength of the vehicle hood 1 is too strong. Therefore, a lower bead 12 having a convex shape is formed in the middle of the skeleton 11 so as to bridge the openings 10 on both sides of the skeleton 11 and toward the lower side of the vehicle. It is easy to do.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Vehicle hood 2 Outer panel 3 Inner panel 10 Opening part 10a Adhesive surface 11, 11a, 11b Frame | skeleton 12 Lower bead 13 Upper bead

Claims (3)

In a vehicle hood structure having an outer panel that constitutes a vehicle outer surface of a vehicle hood, and an inner panel disposed inside the outer panel,
A plurality of openings provided by partially cutting out the inner panel;
A skeleton extending between the plurality of openings in the vehicle longitudinal direction and the vehicle width direction;
A lower bead formed in the middle of the skeleton and having a convex shape toward the vehicle downward direction,
At least one lower bead is formed between intersecting portions of the skeleton extending in the vehicle longitudinal direction and the skeleton extending in the vehicle width direction ;
Two lower beads are extended in the vehicle front-rear direction in an extension portion of the frame extending in the vehicle width direction at the intersection of the frame extending in the vehicle width direction and the two frames extending in the vehicle front-rear direction outside in the vehicle width direction. A vehicular hood structure formed so as to bridge the openings on both sides of the extending skeleton . The vehicle hood structure according to claim 1,
The vehicular hood structure, wherein the lower bead is formed between the intersecting portion and an end of the skeleton. The vehicle hood structure according to claim 1 or 2,
The vehicular hood structure characterized in that the lower bead is formed so as to bridge the openings on both sides of the skeleton to be formed.

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