JPH107027A - Front hood for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a bending moment generated on an object by providing a support part to distribute reaction force generated on an inner panel at the time when the object falls in at the time of collision and supporting the object at more than three points. SOLUTION: A front hood for an automobile constituted of an outer panel 101 and an inner panel 102 is constituted to arrange an upper end on the opposite side of a connecting part in the middle on a roughly straight line made at the time of binding a portion connected to or hemmed to the outer panel 101 of the inner panel 102 provided in the longitudinal direction of a vehicle and to have at least one separate member of a channel material 103 connected to the inner panel in the left and right direction of the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle front provided at a front portion of a vehicle hood and comprising an outer panel and an inner panel having a plurality of large and small step-like structures for improving the rigidity of the outer panel. About food.

[0002]

2. Description of the Related Art As a conventional front hood for an automobile, for example, there is one shown in FIGS. 9 and 10 (see Japanese Patent Application Laid-Open No. Sho 60-17742). 9 is a perspective view of the vehicle as viewed from the front, and FIG. 10 is an enlarged view of FIG. 9 taken along the line II-II.

Generally, when a running vehicle collides with an object, such as an animal or a pylon, which is not fixed to the ground, the vehicle is flipped up by primary contact by a bumper, falls down toward the rear of the vehicle, and interferes with the tip of the hood. There are cases.

In such a collision, as shown in FIG. 10, a collapsed space formed by an inner panel 91 and an outer panel 93 is provided to increase the amount of energy absorbed when the object falls down. .

[0005]

However, in such a conventional automobile front hood, the distance between the inner panel and a portion close to the outer panel on the inner panel is large in order to take up a large crushed space. Collapsed,
When the outer panel is deformed and comes into contact with the inner panel, the reaction force generated from the inner panel is supported at two points, so that a bending moment is generated in the object and a reaction force is generated in the object. Was.

The present invention has been made in view of such a conventional problem, and has a support portion for distributing a reaction force generated on an inner panel when an object falls down at the time of a collision. An object of the present invention is to solve the above-described problem by reducing the bending moment generated in the object by providing the support above the point.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a vehicle front hood having an outer panel and an inner panel, which is joined to an outer panel of an inner panel provided in a vehicle longitudinal direction. Alternatively, the upper end on the side opposite to the joint is disposed at a substantially linear middle formed when connecting the hem-treated portions, and has at least one separate member joined on the inner panel in the vehicle left-right direction. .

The present invention also provides a front hood for an automobile comprising an outer panel and an inner panel, wherein the inner panel is provided with a plurality of irregularities, and has a cut-and-raised structure in which a ridgeline of the irregularities is cut. One end of the cut-and-raised opening is formed in a straight line connecting a step-like portion of the inner panel provided in the vehicle front-rear direction and close to the outer panel.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing the basic concept of the present invention. For example, to support both ends of the beam length l, when the dispersion weight omega is applied to the beam, the maximum bending moment is expressed by ^{M = ω · l 2/8} ... (1). At this time, the bending moment acting on the beam is represented by M = 9/512 · ωl ² (2) by increasing the supporting point to the position C under the same conditions, and the bending moment can be reduced.

(First Embodiment) FIG. 2 is a diagram showing a first embodiment of the present invention. The front hood structure of the vehicle according to the first embodiment has an outer panel 1
01, inner panel 102, and channel material 103
The channel member 103 is joined to the inner panel 102 by means such as spot welding or the like, and is disposed in the vehicle left-right direction. Non-joining surface 103a of channel material 103
The upper end is arranged in a straight line connecting the stepped portions 102a and 102b close to the outer panel of the inner panel provided in the vehicle front-rear direction.

Next, the operation of the first embodiment will be described. When the target object falls down with the load F from the front of the vehicle, as shown in FIG. 3, the target object interferes with the outer panel 101 at the tip of the hood. At that time the outer panel 101
Since it is formed of a thin plate, it is deformed in the direction of the inner panel 102. Thereafter, the deformation proceeds, and the object moves to the point 102 on the inner panel 102 via the outer panel 101.
a and 102b, the model shown in FIG. 1 is created. That is, both ends are supported at two points 102a and 102b,
A dispersion load is applied to the distance between the two points. At this time 103a
Are arranged on the bases 102a and 102b, the bending moment generated in the object is reduced as shown in FIG.

(Second Embodiment) A front hood structure of a vehicle according to a second embodiment of the present invention is, as shown in FIG. 4, joined to an inner panel to increase the number of supporting points for an object. Is constituted by an extruded member 104 using a light alloy such as aluminum having a hat-shaped cross section. A side 104 in the vehicle front direction provided on the protrusion of the pushing member 104.
a is arranged on a straight line connecting points 102a and 102b on the inner panel 102 arranged before and after the first panel.
The operation according to the embodiment of the present invention will be described.

(Third Embodiment) FIG. 5 shows a third embodiment of the present invention, in which the pushing member 104 is replaced with the pushing member 104 shown in the second embodiment. It is constituted by an opening member 105 having an edge at a position, for example, a plate formed by press molding.

(Fourth Embodiment) FIG. 6 shows a fourth embodiment of the present invention, in which the convex portion provided on the opening member 105 shown in the third embodiment is replaced with a convex portion. Points 102a and 102b on the inner panel 102 arranged before and after
Have a cross-sectional shape having a plane 105a that is in contact with a straight line connecting Thereby, the length of the beam shown in FIG. 1 is reduced, and the bending moment can be reduced.

(Fifth Embodiment) FIG. 7 shows a fifth embodiment of the present invention, in which an opening member 10 shown in FIG.
Instead of 5, the inner panel 102 has a cut-and-raised portion 106 that is cut by a ridge line in the vehicle left-right direction to a position equivalent to the convex portion of the opening member 105.

(Sixth Embodiment) FIG. 8 shows a sixth embodiment of the present invention. One side of the cut-and-raised portion 106 shown in FIG. The inner panel 102 has a flat surface 106a that is in contact with a straight line connecting the points 102a and 102b on the inner panel 102.

In the fifth and sixth embodiments, a structure having an emboss having an edge at the same position may be used instead of the cut-and-raised portion. .

[0018]

As described above, according to the present invention, when a moving vehicle collides, the interference between the object and the tip of the hood caused by the falling of the object causes a collision between the object and the inner panel. In order to increase the number of contact support points and the support area, (1) another member is joined to the inner panel. (2) the inner panel is cut and raised and embossed to reduce the bending moment generated on the object. The effect of reducing the deformation and damage of the object can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic concept of the present invention.

FIGS. 2A and 2B are explanatory views showing the first embodiment of the present invention, wherein FIG. 2A is a side sectional view, FIG. 2B is a perspective view, and FIG. 2C is an exploded perspective view.

FIG. 3 is an operation explanation of the first embodiment of the present invention.

FIGS. 4A and 4B are explanatory views showing a second embodiment of the present invention, wherein FIG. 4A is a side sectional view and FIG. 4B is a perspective view.

FIGS. 5A and 5B are explanatory views showing a third embodiment of the present invention, wherein FIG. 5A is a side sectional view and FIG. 5B is a perspective view.

FIGS. 6A and 6B are explanatory views showing a fourth embodiment of the present invention, wherein FIG. 6A is a side sectional view, and FIG. 6B is a perspective view.

FIGS. 7A and 7B are explanatory views showing a fifth embodiment of the present invention, in which FIG. 7A is a side sectional view and FIG. 7B is a perspective view.

FIGS. 8A and 8B are explanatory views showing a sixth embodiment of the present invention, in which FIG. 8A is a side sectional view and FIG. 8B is a perspective view.

FIG. 9 is a front perspective view of a vehicle having a conventional automobile front hood.

FIG. 10 is an enlarged view taken along line II-II of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Outer panel 102 Inner panel 102a, 102b Stair-shaped part 103 Channel material 103a Non-joining surface 104 Extruded member 104a Side in the vehicle front direction 105 Opening member 105a Plane 106 Cut-and-raised part 106a Plane

Claims (6)

[Claims] 1. An automobile front hood comprising an outer panel and an inner panel, wherein a substantially straight line formed when a portion joined or hem-treated to the outer panel of the inner panel provided in the vehicle longitudinal direction is connected. A front hood for an automobile, wherein an upper end opposite to a joining portion is disposed at an intermediate portion and has at least one separate member joined on an inner panel in a lateral direction of the vehicle. 2. A front hood for an automobile comprising an outer panel and an inner panel, comprising a square member having at least a hat-shaped cross section joined to the inner panel in a vehicle left-right direction, wherein the height of the square member is in the longitudinal direction of the vehicle. A front hood for an automobile, wherein the front hood has a linear shape connecting a step-like portion of an inner panel provided in a direction and adjacent to an outer panel. 3. The front hood for an automobile according to claim 2, wherein a square member having a hat-shaped cross section joined to the inner panel is replaced with an opening member having an equivalent outer shape. . 4. The front hood for an automobile according to claim 3, wherein a part of the opening member is a plane that is in a straight line connecting a step-like portion of the inner panel provided in the vehicle front-rear direction and adjacent to the outer panel. An automotive front hood characterized by: 5. An automobile front hood comprising an outer panel and an inner panel, wherein the inner panel has a plurality of concave and convex portions, and has a cut-and-raised structure in which a ridge line of the concave and convex portions is cut. The front hood for an automobile, wherein one end of the opening is linearly connecting a step-like portion of the inner panel provided in the vehicle front-rear direction and adjacent to the outer panel. 6. The front hood for an automobile according to claim 5, wherein the cut-and-raised portion is formed in a polygonal shape so as to connect a step-like portion of an inner panel provided in a vehicle front-rear direction and close to an outer panel. An automobile front hood having a surface in contact with the shape.