JP2003212155A - Automotive hood structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent gas from filling an engine room upon equipment breakage. <P>SOLUTION: A hood 1 has a vehicle body front side turnable with respect to a vehicle body 3 via hinges 9. A hood-mounted member 15 of the hinges 9 is fixed on a lower face 1a of the hood 1 with bolts 21, and a lower face of the hood-mounted member 15 between the bolts 21 and a hinge shaft 17 is provided with a notched recess portion 23. Between the notched recess portion 23 and the hinge shaft 17, a seal member 25 is interposed to seal a gap between the hood 1 and the vehicle body 3. At a frontal vehicle collision, the hood- mounted member 15 of the hinges 9 is bent into a ridge along the notched recess portion 23 to bring a rear end of the hood 1 opening with respect to the vehicle body 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hood structure for an automobile provided with a hood that covers an engine room at the front of a vehicle body.

[0002]

2. Description of the Related Art Generally, as a hood structure of an automobile, there is known a hood structure having a seal member interposed between a rear surface of a rear end of the hood and a vehicle body (see Japanese Patent Publication No. 8-9345).

[0003]

By the way, in the above-mentioned conventional automobile hood structure, when the equipment in the engine room is damaged and gas leaks, the seal member remains in contact with the back surface of the hood. The leaked gas may fill the engine room.

Therefore, an object of the present invention is to avoid gas filling due to equipment damage in the engine room.

[0005]

In order to achieve the above object, the invention of claim 1 is such that a hood covering an engine room at a front portion of a vehicle body and a rear end portion of the hood in a vehicle front-rear direction relative to a vehicle body. In a hood structure of an automobile including a rotation support member that is rotatably attached and that supports the hood to be opened and closed, a rotation center of the rotation support member is arranged below a lower surface of the hood, and the rotation support member is provided. The hood attachment side member is provided with a fragile portion.

According to a second aspect of the present invention, in the configuration of the first aspect of the invention, the fragile portion is set between the coupling portion of the rotation supporting member with the hood and the rotation center of the rotation supporting member. is there.

According to a third aspect of the invention, in the configuration of the first or second aspect of the invention, a seal for sealing between the hood and the body of the vehicle between the rotation center of the rotation supporting member and the fragile portion. It is configured to have members.

According to a fourth aspect of the present invention, in the structure according to any one of the first to third aspects, the fragile portion is such that a member on the hood mounting side of the rotation supporting member is projected upward when a frontal collision of a vehicle occurs. This is to promote the breakage.

According to a fifth aspect of the present invention, in the structure according to any one of the first to fourth aspects, the hood weakened portion extending in the vehicle width direction is provided in the hood on the vehicle body front side of the weakened portion. There is.

According to a sixth aspect of the present invention, in the structure of the fifth aspect, when the hood is moved rearward with respect to the vehicle body, a stopper is provided for restricting the amount of movement of the hood, and the hood weak portion is It is provided on the rear side of the vehicle body with respect to the stopper.

According to a seventh aspect of the present invention, in the structure of the fifth or sixth aspect of the invention, the hood weakening portion promotes the bending of the hood which is convex downward when a frontal collision of the vehicle occurs.

According to an eighth aspect of the present invention, in the structure according to any one of the fifth to seventh aspects, an opening is provided on the upper surface of the hood above the hood weak portion, and a removable lid for closing the opening is provided. It is provided as a configuration.

[0013]

According to the first aspect of the present invention, at the time of a frontal collision of the vehicle, the rotation supporting member bends from the weak point of the member on the hood mounting side mounted on the lower surface of the hood above the center of rotation as a starting point. Accordingly, the hood is displaced and the rear end is opened, so that the gas leaked in the engine room can be exhausted to the outside.

According to the second aspect of the present invention, in the member on the hood mounting side of the rotation supporting member, the fragile portion is set between the connecting portion with the hood of the rotation supporting member and the rotation center of the rotation supporting member. Therefore, it is possible to easily bend the gas that has leaked in the engine room to the outside when a frontal collision occurs.

According to the third aspect of the present invention, the hood is displaced along with the bending of the member on the hood mounting side of the rotation supporting member, whereby the seal provided between the rotation center of the rotation supporting member and the fragile portion. The sealing action of the member can be reliably released.

According to the fourth aspect of the present invention, the member on the hood mounting side of the rotation support member is liable to be bent upward to be convex at the time of a frontal collision of the vehicle by the fragile portion. It can be opened.

According to the fifth aspect of the invention, the hood also bends with the hood weak portion as a starting point in accordance with the bending of the member on the hood mounting side of the rotation support member, so that the rear end of the hood can be opened more reliably. it can.

According to the sixth aspect of the present invention, even if the rear end of the hood is opened at the time of a frontal collision of the vehicle, the stopper located in front of the hood weakened portion restricts the rearward movement of the hood. Can be secured.

According to the seventh aspect of the invention, since the hood weak portion promotes the downward bending when the frontal collision of the vehicle occurs, the hood can surely open the rear end of the hood.

According to the eighth aspect of the present invention, when the frontal collision of the vehicle occurs, the lid is detached and the rigidity of the upper surface is lowered due to the opening, so that the hood is more reliably bent downward.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a hood structure for an automobile according to a first embodiment of the present invention. In FIG. 1, the left direction is the front side of the vehicle body, and the hood 1 is the vehicle body 3
Covers the engine room 5 of. Reference numeral 7 is a windshield.

The hood 1 described above pivots vertically on the front side of the vehicle body on the left side in the figure, with a pair of hinges 9 as rotation supporting members arranged on both sides in the vehicle width direction as fulcrums.

In the hinge 9, a member 13 on the vehicle body main body mounting side and a member 15 on the hood mounting side are rotatable with respect to each other around a hinge shaft 17 which is the center of rotation of the hinge 9. The member 13 on the vehicle body main body mounting side is coupled to the upper surface of the vehicle body 3 by two bolts 19 arranged along the vehicle longitudinal direction.

The center of the hinge shaft 17, which is the center of rotation of the hinge 9, is located below the lower surface 1a of the hood 1 by a dimension T.

On the other hand, the member 15 on the hood mounting side is provided with two bolts 21 serving as a connecting portion arranged along the longitudinal direction of the vehicle body.
Is coupled to the lower surface 1a of the hood 1 by. The bolt 21 and the hinge shaft 1 on the rear side of the vehicle body of the member 15 on the hood mounting side
In the vicinity of the bolt 21 between 7 and 7, the hood mounting surface (lower surface 1
A V-shaped cut-in concave portion 23 is formed as a fragile portion on the surface opposite to the side a).

A seal member 25 that seals between the hood 1 and the vehicle body 3 is interposed between the cut recess 23 and the hinge shaft 17.

According to the above-mentioned hood structure, when the hood 1 receives a force toward the rear of the vehicle body at the time of a frontal collision of the vehicle, this force is transmitted to the hinge 9, and the hinge 9 as shown in FIG. The member 15 on the hood mounting side is bent so that the cut-out concave portion 23 functioning as a weak portion serves as a starting point so that the upper portion is convex. Along with this, the hood 1 is pushed upward by the member 15 on the hood mounting side and displaced upward, and the rear end thereof is opened to the vehicle body 3. At this time, the hood 1 is
Since it is separated from the sealing member 25, the sealing action with the vehicle body 3 is also released.

As a result, the engine room 5 and the outside of the vehicle are brought into communication with each other through the gap S between the rear end of the hood 1 and the seal member 25, and the equipment in the engine room 5 is damaged by a frontal collision. Even if gas leaks, the leaked gas is exhausted to the outside through the gap S,
It is avoided that the leaked gas fills the engine room 5.

FIG. 3 is a sectional view showing a hood structure for an automobile according to a second embodiment of the present invention. This embodiment differs from the first embodiment shown in FIGS. 1 and 2 in that the lower surface 1a of the hood 1 on the vehicle body front side of the hinge 9 is
A protrusion 27 as a hinge weak portion is formed by extending in the vehicle width direction in a state of protruding downward by embossing or the like. That is, the protrusion 27 is the weak portion 2 of the hinge 9.
It is located on the front side of the vehicle body with respect to 3. Other configurations are similar to those of the first embodiment shown in FIGS. 1 and 2.

In this embodiment, as shown in FIG. 4, at the time of a frontal collision of the vehicle, the member 1 on the hood mounting side of the hinge 9 is provided.
5 bends so as to be convex upward from the cut concave portion 23 and the rear end of the hood 1 is displaced upward, so that the hood 1 is convex downward from the fragile portion 27 of the hood. Bend.

As a result, the rear end of the hood 1 attached to the member 15 on the hood mounting side is surely displaced upward, and the hood 1 is opened to the vehicle body 3 and the seal member 2 is provided.
The sealing action of 5 is also reliably released.

FIG. 5 is a sectional view showing a hood structure for an automobile according to a third embodiment of the present invention. The hood 29 here is configured by joining an outer panel 31 and an inner panel 33 that forms the lower surface of the hood 29 to each other, and covers an engine room 37 of the vehicle body 35.
The hood 29 pivots vertically on the vehicle body front side on the left side in the drawing with a pair of hinges 39 serving as rotation supporting members disposed on both sides in the vehicle width direction as fulcrums. Reference numeral 41 is a windshield glass, and reference numeral 43 is a cowl cover.

The hinge 39 is the inner panel 3 of the hood 1.
The hood mounting side member 45 fixed to the lower surface of the vehicle body 3 and the vehicle body main body mounting side member 49 fixed to the upper surface of the hood ridge panel 47 of the vehicle body 35 form a hinge shaft 51 that serves as a rotation center of the hinge 39. It is possible to rotate mutually as a center.

The center of the hinge shaft 51, which is the center of rotation of the hinge 39, is located below the lower surface of the inner panel 33 of the hood 29 by a dimension T.

A member 53 on the hood mounting side of the hinge 39 is provided with a protrusion 53 as a fragile portion which is convex upward at a position near the hinge shaft 51 by embossing or the like. Then, between the protrusion 53 and the hinge shaft 51, the vehicle body rear end of the inner panel 33 of the hood 29 and the cowl cover 43 on the cowl box 55 of the vehicle body 35 are extended in the vehicle width direction. Seal member 5
7 is installed.

Further, in the above-mentioned hinge 39, the hood 2 is attached to the body front side end of the member 49 on the body body mounting side.
A hook portion 49a, which serves as a stopper for restricting the movement of the vehicle 9 toward the rear of the vehicle body, is provided so as to project upward. On the other hand, the hook portion 49a is provided on the member 45 on the hood mounting side.
An insertion hole 45a that is inserted when the hood 29 is closed is formed. Corresponding to this insertion hole 45a, the inner panel 33 of the hood 29 is also formed with an insertion hole 33a into which the hook portion 49a is inserted.

As shown in FIG. 5, the hook portion 49a is inserted in the rear side of the vehicle body of the insertion holes 33a and 45a.
In this state, the hook portion 49a has a predetermined space H between the insertion holes 33a and 45a and the edge portions on the front side of the vehicle body.
This distance H is set so that the hood 2 can be used when a frontal collision of the vehicle occurs.
9 corresponds to the movable distance to the rear of the vehicle body.

On the inner panel 33 of the hood 29 on the rear side of the vehicle body of the insertion holes 33a and 45a, a projection 59 as a hood weak portion which is convex downward is formed by embossing or the like. The protrusion 59 is formed so as to extend in the vehicle width direction. Correspondingly, the member 45 on the hood mounting side of the hinge 39 is also provided with a protrusion 61 protruding downward by embossing or the like.

According to the above-mentioned hood structure, when the hood 29 receives a force toward the rear of the vehicle body at the time of a frontal collision of the vehicle, this force is transmitted to the hinge 39, and the hinge 39, as shown in FIG. , The member 45 on the hood mounting side, so that the projection 53, which functions as a fragile portion, becomes convex from above.
Bends.

At this time, the rear end of the hood 29 is pushed by the member 45 on the hood mounting side, and the hood 29 is bent and displaced so that the projection 59 serves as a starting point and the downward projection is convex. As a result, the rear end of the hood 29 is opened to the vehicle body 3 and separated from the seal member 57, and the sealing action of the seal member 57 is also released.

As a result, between the engine compartment 37 and the outside of the vehicle, the gap S between the rear end of the hood 29 and the seal member 57 is formed.
Therefore, even if a device in the engine room 37 is damaged due to a frontal collision and gas leaks, the leaked gas is exhausted to the outside through the gap S, and the leaked gas is leaked to the engine room. Filling into 37 is avoided.

At this time, the hook portion 49 of the hinge 39
Since a and the insertion holes 33a and 45a are located in front of the vehicle body with respect to the protrusion 59 which is the starting point of the bending displacement of the hood 29, the periphery of this portion is not largely displaced at the time of the collision, so that the hood 29 is moved to the rear side of the vehicle body. When moving towards
The hook portion 49a contacts the edge portion on the front side of the vehicle body in a state where the hook portion 49a is inserted into the insertion holes 33a and 45a, and the function as a stopper is ensured.

FIG. 7 is a sectional view showing the hood structure of an automobile according to the fourth embodiment of the present invention. This embodiment differs from the third embodiment shown in FIGS. 5 and 6 in that an opening 31a is provided at a position corresponding to the protrusion 59 of the outer panel 31 of the hood 29, and the opening 31a is detachable. A resin cover 63 is provided. Other configurations are similar to those of the third embodiment shown in FIGS. 5 and 6.

In this embodiment, as in the case of FIG. 5 and FIG. 6, at the time of a frontal collision of the vehicle, the member 45 on the hood mounting side of the hinge 39 bends from the projection 53 as a starting point to be convex upward, When the rear end of the hood 29 is displaced upward, the hood 29 bends from the projection 59 as a starting point to be convex downward.

At this time, as shown in FIG. 8, the outer cover 3 made of resin is removed, and the rigidity of the outer panel 3 is reduced.
The rear end of the hood 29 having No. 1 is easily bent upward, and the leaked gas in the engine room can be reliably discharged to the outside.

The opening 31a and the lid 63 may be formed long along the vehicle width direction, but a plurality of disk-shaped ones may be provided along the vehicle width direction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a hood structure for an automobile according to a first embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of the first embodiment.

FIG. 3 is a sectional view showing a hood structure for an automobile according to a second embodiment of the present invention.

FIG. 4 is an operation explanatory diagram of the second embodiment.

FIG. 5 is a sectional view showing a hood structure for an automobile according to a third embodiment of the present invention.

FIG. 6 is an operation explanatory diagram of the third embodiment.

FIG. 7 is a sectional view showing a hood structure for an automobile according to a fourth embodiment of the present invention.

FIG. 8 is an operation explanatory diagram of the fourth embodiment.

[Explanation of symbols]

1,29 hood 1a Underside of hood 3,35 Body 5,37 engine room 9,39 Hinge (rotating support member) 15,45 Hood mounting side member 17,51 Hinge axis (center of rotation) 21 bolts (joint) 23 Notched recess (fragile part) 25,57 Seal member 27,59 Protrusions (fragile hood) 31a opening 33 Inner panel (underside of hood) 49a Hook part (stopper) 53 Protrusion (fragile part) 63 lid

Claims (8)

[Claims] 1. A hood that covers an engine room at a front portion of a vehicle body, and a rotation support member that is rotatably attached to a vehicle body at a rear end portion of the hood in a vehicle front-rear direction to support the hood so that the hood can be opened and closed. In a hood structure of an automobile provided, the rotation center of the rotation supporting member is arranged below a lower surface of the hood, and a fragile portion is provided in a member on the hood mounting side of the rotation supporting member. Hood structure. 2. The hood structure for an automobile according to claim 1, wherein the fragile portion is set between a connecting portion of the rotation supporting member with the hood and a rotation center of the rotation supporting member. 3. A seal member, which seals between the hood and the vehicle body, is provided between the rotation center of the rotation support member and the fragile portion. Car hood structure. 4. The fragile portion promotes bending of a member on the hood mounting side of the rotation supporting member that is convex upward when a frontal collision of a vehicle occurs.
4. The automobile hood structure according to any one of items 1 to 3. 5. The vehicle hood structure according to claim 1, wherein the hood on the vehicle body front side of the fragile portion is provided with a hood fragile portion extending in the vehicle width direction. . 6. A stopper is provided to regulate the amount of movement of the hood when the hood moves rearward with respect to the vehicle body.
The vehicle hood structure according to claim 5, wherein the hood weak portion is provided rearward of the vehicle body with respect to the stopper. 7. The vehicle hood structure according to claim 5, wherein the hood weak portion promotes a downward bending of the hood when a frontal collision of the vehicle occurs. 8. The automobile according to claim 5, wherein an opening is provided on the upper surface of the hood above the fragile portion of the hood, and a detachable lid for closing the opening is provided. Hood structure.