JPH04262977A - Engine hood reinforcing structure - Google Patents

Abstract

PURPOSE:To provide an engine hood reinforcing structure which can increase the bending rigidity of a striker mounting part of the engine hood with low cost without accompanying the remarkable increase of weight. CONSTITUTION:A striker 20 is secured fixedly to a hood lock hook base 16 as a reinforcing material sticked to a hood inner panel 14. A hood lock reinforcement 18 having a corrugated section is stuck to both ends of the hood lock base 16 to constitute a closed section with the hood lock hook base 16 and hood lock reinforcement 18. While force acting on the striker 20 is supported by the closed section of the hood lock hood base 16 and hood lock reinforcement 18, since a plurality of erect surface parts 19 are molded in the hood lock reinforcement 18, a modulus of section to the longitudinal axis of a vehicle is increased as much to increase the bending rigidity of the closed section. Thus, the striker 20 mounting section of the engine hood 10 does not bend downward.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for an automobile engine hood.

0002

2. Description of the Related Art As shown in FIG. 4, an engine hood 52 covering an engine compartment 50 of an automobile is designed to prevent vibrations from occurring when the vehicle is running.
A cushion 56 for vibration absorption is provided between the engine hood 52 and the body 54, and is locked to the body 54 by a striker 58 provided at the tip of the engine hood 52.

However, when the bending stiffness of the engine hood 52 in the vehicle width direction is small, when a predetermined force F is applied to the striker 58, as shown in FIG.
As the mounting portion of the striker 58 of No. 2 bends downward, both longitudinal ends of the engine hood 52 lift up and become curved, creating a level difference between the parting part of the fender panel 60 and the appearance of the vehicle and the wind flow during driving. This was unfavorable in terms of noise and aerodynamic characteristics.

In order to deal with this problem, as shown in FIG. 5, a hat-shaped cross-section as a reinforcing member is installed at the attachment portion of the striker 58 of the engine hood 52, which is composed of a hood outer panel 62 and a hood outer panel 64. A hood lock reinforcement 68 and a hood panel reinforcement 70 are provided to improve the bending rigidity of the tip of the engine hood 52 and prevent the engine hood 52 from curving (published). (Refer to Utility Model Publication No. 1982-195273).

However, the structure of the conventional hood lock reinforcement 68 has a simple hat-shaped cross section, so in order to increase the bending stiffness in the vehicle width direction, measures such as increasing the plate thickness and changing the material are required. This has led to a significant increase in weight and cost.

[0006]

[Problems to be Solved by the Invention] Taking these facts into consideration, the present invention provides an engine hood reinforcement structure that can increase the bending rigidity near the striker attachment portion without significantly increasing weight and at low cost. The purpose is to

[0007]

[Means for Solving the Problem] In the reinforcement structure for an engine hood according to the present invention, in the reinforcement structure for a striker mounting portion for locking an engine hood constituted by a hood inner panel and a hood outer panel to a body, the hood inner A hood lock hook base that is joined to the panel and fixes the striker, and a hood that is joined to the hood lock hook base and has a planar and vertical part that are continuously bent and have a corrugated cross section when viewed from the width of the vehicle. It is characterized by having a lock reinforcement.

[0008]

[Operation] In the engine hood reinforcement structure configured as described above, the downward force acting on the striker is supported by the closed cross section composed of the hood lock hook base and the hood lock reinforcement. Here, since the hood lock reinforcement is formed with a large number of vertical parts, the section modulus with respect to the longitudinal axis of the vehicle increases accordingly, and the bending rigidity of the closed cross section increases accordingly. Therefore, the striker mounting portion of the engine hood does not bend downward.

[0009]

[Embodiment] As shown in FIG. 2, an engine hood 10
is composed of a hood outer panel 12 and a hood inner panel 14, and between the hood outer panel 12 and the hood inner panel 14, a hood lock hook base 16 and a hood lock reinforcement 18 are provided as reinforcing members. There is. An opening 14A is formed in the front portion of the hood inner panel 14 of the vehicle body. A striker 2 is provided near both ends of the opening 14A.
0 fixing groove 16A, and an opening 1 in the center.
Both ends in the vehicle width direction of the plate-shaped hood lock hook base 16 on which the hook 6B is formed are joined.

A hood lock reinforcement 18 is disposed above the hood lock hook base 16 over the entire width of the vehicle. As shown in FIG. 1, this hood lock reinforcement 18 has a standard shape in which a plane part 17 functioning as a flange and an elevation part 19 functioning as a web are continuously bent and molded to form a vehicle. The cross section viewed from the width direction is a corrugated plate-like cross section. To explain in more detail, as shown in FIG.
7A, an elevated surface portion 19A that descends from this flat surface portion 17A, and a flat surface portion 17B that extends horizontally from the tip of this vertical surface portion 19A.
, an elevated surface portion 19B protruding from the tip of this flat portion 17B;
The hood outer panel 12 is
a flat part 17C extending parallel to the flat part 17C; an elevated part 19C hanging down from the tip of the flat part 17C; a flat part 17D extending horizontally from the tip of the vertical part 19C;
It is composed of an elevated surface portion 19D that rises from the tip of the hood, and a flat portion 17E that extends parallel to the hood outer panel 12 from the tip of the elevated surface portion 19D.

As shown in FIG. 2, the hood lock reinforcement 18 has a corrugated plate-like cross section, although the connecting portion between the vertical portion 19B and the flat portion 17D is slightly deformed at the attachment portion of the striker 20. continuity is maintained. The lowermost flat parts 17B and 17D are joined to the upper surfaces of both ends of the hood lock hook base 16, and form a closed cross section with the hood lock hook base 16.

Next, the engine hood 10 according to this embodiment
A description will be given of the deformation when the force F is applied to the striker 20 attached to the striker 20.

As shown in FIG. 1, when a force F acts on the striker 20, a bending moment M is generated around the fender portion (not shown) as a fulcrum. The bending stress generated by this bending moment M acts on the closed cross section composed of the hood lock hook base 16 and the hood lock reinforcement 18 as reinforcing members.

However, since the hood lock reinforcement 18 is formed with a large number of vertical surfaces 19 that function as webs, the section modulus is correspondingly large and the bending rigidity is also large, so that the mounting portion of the striker 20 is It does not bend downward. For this reason, the engine hood 10 reinforced by the hood lock reinforcement 18
Since the fender panel 60 does not bend, there is no difference in level between the fender panel 60 and the parting part.

As shown in FIG. 5, the structure of the conventional engine hood 52 includes a hood lock reinforcement 68 and a hood panel reinforcement 70.
The massmatic sealer 48 is interposed on the upper surface of the hood panel reinforcement 70 to fix the hood panel reinforcement 70 and the hood outer panel 62, and the hood outer panel 6
2's rigidity was improved.

However, according to the hood lock reinforcement 18 of this embodiment, sufficient rigidity can be ensured without providing the hood panel reinforcement 70. A massmatic sealer 48 is interposed on the upper surfaces of 17C and 17E to seal the hood lock reinforcement 18 and the hood outer panel 1.
2, the rigidity of the hood outer panel 12 can be ensured as in the case where the hood panel reinforcement 70 is provided.

[0017] This eliminates the need to provide the hood panel reinforcement 70, so that the overall weight of the engine hood 10 can be reduced.

In this embodiment, the hood lock reinforcement 18 has four vertical surfaces 19, but if there are at least three, the hood lock reinforcement 18 can be bent more easily than the conventional hat-shaped cross section. Stiffness can be improved.

[0019]

As explained above, in the engine hood reinforcement structure according to the present invention, the bending rigidity of the hood lock reinforcement as a reinforcing material is improved, and the striker mounting portion is deformed when the engine hood is locked. Therefore, there is no difference in level between the parting part with the fender panel, which is excellent in terms of appearance, noise caused by wind when driving, and aerodynamic characteristics.

Furthermore, since there is no need to provide hood panel reinforcement, the weight of the entire engine hood can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a state in which a striker is fixed to a hood lock reinforcement and a hood lock hook base that constitute an engine hood reinforcement structure according to the present invention.

FIG. 2 is a cross-sectional view taken along line 2-2 showing a striker mounting portion of the engine hood reinforcement structure according to the present invention.

FIG. 3 is a sectional view taken along line 3-3 showing a standard part of the engine hood reinforcement structure according to the present invention.

FIG. 4 is a sectional view showing a conventional engine hood in a curved state.

FIG. 5 is a sectional view showing a striker mounting portion of a conventional engine hood reinforcement structure.

[Explanation of symbols]

Claims (1)

[Claims] 1. A reinforcement structure for a striker attachment portion for locking an engine hood to a body, which is comprised of a hood inner panel and a hood outer panel, comprising: a hood lock hook base joined to the hood inner panel and fixing the striker; An engine characterized in that it has a hood lock reinforcement that is joined to the hood lock hook base and has a plane part and an vertical part continuously bent and has a corrugated plate-like cross section when viewed from the vehicle width direction. Reinforced structure of the hood.