JP4766432B2 - Automotive hood structure - Google Patents

Description

  The present invention relates to a structure of a hood of an automobile, and more particularly to a hood structure having improved shock absorption while ensuring pedestrian protection performance.

  An example of a conventional automobile hood structure 100 is shown in FIG. This figure is a sectional view of a conventional hood structure, in which Fr indicates the front of the vehicle and Up indicates the upper side of the vehicle. The hood structure 100 includes a hood outer panel 110, a hood inner panel 120 disposed at a distance from the hood outer panel 110, a striker 130 protruding downward from a front portion of the hood inner panel 120, A hood lock reinforcement panel 140 for supporting the striker 130.

  The hood inner panel 120 includes a first horizontal portion 121 that supports the striker 130, a first inclined portion 122 that extends rearwardly from the rear edge of the first horizontal portion 121, and an upper portion of the first inclined portion 122. A shelf 123 extending horizontally from the edge to the rear.

  The hood lock reinforcement panel 140 is provided on the front side of the first inclined portion 122 and the first inclined portion 122 so as to form a clearance between the second horizontal portion 141 superimposed on the first horizontal portion 121. A second inclined portion 142 extending from the rear edge of the second horizontal portion 141 to the rear upper direction to the upper side of the shelf 123 or to the upper front side.

According to such a conventional hood structure 100, when a collision object collides with the front area of the hood, the collision object enters the hood from the top of the hood toward the bottom of the hood, and the hood is deformed during the approach. As a result, the impact energy to the collision object is absorbed. Therefore, the impact on the collision object is reduced.
JP 2004-50909 A

  In the conventional hood structure 100 shown in FIG. 4, in order to further improve the absorbability of impact energy, it is conceivable that the hood lock reinforcement panel 140 is quickly applied to the hood inner panel 120. Therefore, for example, another structure may be arranged between the hood lock reinforcement panel 140 and the hood inner panel 120. However, there is a risk of impairing the approach distance of the collision object into the hood, and if the approach distance is shortened, the impact on the collision object may be increased.

  The present invention has been created in view of the above points, and an object of the present invention is to provide an automobile hood structure that further improves the absorbability of impact energy while maintaining pedestrian protection performance.

In order to achieve the above object, the present invention includes a hood outer panel that constitutes a vehicle body outer surface, a hood inner panel that is disposed below the hood outer panel and has a peripheral edge joined to the peripheral edge of the hood outer panel, and a hood front part. In a hood structure of an automobile comprising a striker provided on the lower surface of the hood and a hood lock reinforcement panel that reinforces the front portion of the hood to which the striker is attached, a hood inner panel includes a first horizontal portion that supports the striker, A hood lock reinforcement panel, comprising: a first inclined portion extending rearward from the rear edge of the first horizontal portion; and a shelf portion extending horizontally rearward from the upper edge of the first inclined portion. but a second horizontal portion that is superimposed on the first horizontal portion, et provided on the front side of the first inclined portion Re rearward upward from the rear edge of the second horizontal portion Includes a second inclined portion extending to a part of the upper or on the front, and down bead formed in a portion of the second angled portion on the upper or forwardly from ledge, a second inclined portion, the hood outer When the panel is deformed toward the hood inner panel, it is placed away from the hood outer panel so that it abuts the hood lock reinforcement panel, and when the hood lock reinforcement panel is deformed, it contacts the hood inner panel. It is characterized in that a clearance is formed between the first inclined portion and the first inclined portion so as to be in contact with each other.
In the hood inner panel, a corner is formed at the boundary between the first inclined portion and the shelf, and the bead is preferably arranged facing the corner.

  ADVANTAGE OF THE INVENTION According to this invention, the timing which a hood lock reinforcement panel contacts a hood inner panel becomes early, it can absorb impact energy continuously and efficiently, and the impact which acts on a collision object can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a hood structure 1 according to an embodiment of the present invention. In the drawing, Fr indicates the front of the vehicle, and Up indicates the upper side of the vehicle.

  The hood structure 1 includes a hood outer panel 10 that constitutes an outer surface of the vehicle body, a hood inner panel 20 that is disposed below the hood outer panel 10 and has a peripheral edge joined to the peripheral edge of the hood outer panel 10, and a lower surface of the hood front part. And a hood lock reinforcement panel 40 for reinforcing the front portion of the hood to which the striker 30 is attached.

  The hood outer panel 10 and the hood inner panel 20 are joined to each other by welding or the like at the periphery so that a space S is defined inside. A hood lock reinforcement panel 40 is disposed in the space S.

  The hood inner panel 20 includes a first horizontal portion 21 that supports the striker 30, a first inclined portion 22 that extends rearwardly from the rear edge of the first horizontal portion 21, and an upper portion of the first inclined portion 22. A shelf 23 extending horizontally from the edge to the rear. The 1st horizontal part 21, the 1st inclination part 22, and the shelf part 23 are each formed in the panel shape, and they are comprised integrally by press molding.

  The hood lock reinforcement panel 40 is provided on the front side of the first inclined portion 22 and the first inclined portion 22 so as to form a clearance between the second horizontal portion 41 superimposed on the first horizontal portion 21. Formed at the site of the second inclined part 42 extending from the rear edge of the second horizontal part 41 to the rear upper direction to the upper part or front upper part of the shelf part 23 and the second inclined part 42 upward or forward from the shelf part 23 And a downward-facing bead 43. As shown in FIG. 2, the bead 43 extends in a streak shape in the vehicle width direction and bulges toward the hood inner panel 20 in a semicircular cross section. In FIG. 2, Out indicates the vehicle width outward direction.

  Furthermore, the corner | angular part 25 is formed in the boundary of the 1st inclination part 22 and the shelf part 23 in the food | hood inner panel 20 of the hood structure 1 which concerns on this embodiment. The corner portion 25 and the bead 43 are disposed to face each other as shown in FIG.

  In the hood structure 1 configured as described above, when the collision object X collides with the hood outer panel 10 in the upper region of the shelf portion 23 of the hood inner panel 20, the collision object X enters the hood. In this entering process, first, the outer hood panel 10 is deformed toward the inner hood panel 20 by the collision object X, and the outer hood panel 10 comes into contact with the hood lock reinforcement panel 40. At the time of this collision, as shown in FIG. 3, the deceleration of the collision object increases and reaches a peak. This peak is defined as a first peak (P1). When the collision object X further enters the hood, the hood lock reinforcement panel 40 is deformed and the hood lock reinforcement panel 40 contacts the hood inner panel 20. Also during this collision, as shown in FIG. 3, the deceleration of the collision object X increases and reaches a peak. This peak is defined as a second peak (P2). Thereafter, the collision object X further enters and the hood inner panel 20 is deformed, whereby the collision object X stops entering.

  In the hood structure 1 according to the present embodiment, the hood lock reinforcement panel 40 is provided with the bead 43 projecting to the hood inner panel 20 side corresponding to the corner portion 25 of the hood inner panel 20, and thus the hood lock reinforcement. The clearance between the panel 40 and the hood inner panel 20 is small. Therefore, the timing at which the hood lock reinforcement panel 40 contacts the hood inner panel 20 is accelerated. That is, in the hood structure 1 of the present embodiment, the second peak (P2) arrives as shown by the solid line, compared to the approach distance where the second peak (P3) of the conventional hood structure shown by the dotted line in FIG. 3 arrives. The timing to do is early.

  As described above, in the hood structure 1 according to this embodiment, the second peak (P2) rises quickly, the impact energy can be absorbed continuously and efficiently, and the impact on the collision object X is reduced. be able to.

It is sectional drawing of the motor vehicle hood structure which concerns on embodiment of this invention. It is a fragmentary perspective view which shows the shelf part and bead in the motor vehicle hood structure of FIG. It is a graph for demonstrating the effect | action of the motor vehicle hood structure of FIG. It is sectional drawing of the conventional motor vehicle hood structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hood structure 10 Hood outer panel 20 Hood inner panel 21 1st horizontal part 22 1st inclination part 23 Shelf part 25 Corner | angular part 30 Striker 40 Hood lock reinforcement panel 41 2nd horizontal part 42 2nd inclination part 43 Bead S space X Collision object

Claims (2)

A hood outer panel constituting the outer surface of the vehicle body, a hood inner panel disposed below the hood outer panel and having a periphery joined to the periphery of the hood outer panel, a striker provided on the lower surface of the hood front, and the striker In a hood structure of an automobile provided with a hood lock reinforcement panel that reinforces the hood front portion to which
The hood inner panel includes a first horizontal portion that supports the striker, a first inclined portion that extends rearward and upward from a rear edge of the first horizontal portion, and a rearward direction from the upper edge of the first inclined portion. A shelf extending horizontally,
The hood lock reinforcement panel, said second horizontal portion to be overlaid on top of the first horizontal portion, the rearward upward from the rear edge of Re et al provided in the front upper Symbol second horizontal portion of the first inclined portion A second inclined portion extending up to the upper or front side of the shelf, and a downward bead formed at a site of the second inclined portion above or forward from the shelf,
The second inclined portion is disposed apart from the hood outer panel so as to abut on the hood lock reinforcement panel when the hood outer panel is deformed toward the hood inner panel, and the hood A hood structure for an automobile , wherein a clearance is formed between the first sloping portion so as to abut on the hood inner panel when the lock reinforcement panel is deformed . The corner of the hood inner panel is formed at a boundary between the first inclined portion and the shelf, and the bead is disposed to face the corner. Car hood structure.

Images