JP2003341555A - Vehicular hood hinge structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular hood hinge structure capable of improving impact absorbing performance while suppressing an influence on flexibility in design. <P>SOLUTION: A hinge member 7 supporting a hood 1 disposed on an engine room R upper part of a vehicular front portion so as to rock in a vehicular up-and-down direction is arranged at an inner position in a vehicular width direction of a vehicular body than the vehicular body side hinge member 8. The hinge member 7 is composed of the hood 1 and a hood side hinge member 9 attached to the vehicular body side hinge member 8. The vehicular body side hinge member 8 is composed of an attaching portion 8a attached to the vehicular body; and a deforming portion 8b arranged at a vehicular lower side than the attaching portion 8a, and capable of deforming to the vehicular lower side. The vehicular body hinge member 8 and the hood side hinge member 9 are offset-disposed in the vehicular width direction, and the deforming portion 8b is disposed in a vehicular lower side than the attaching portion 8a, so that the displacement stroke amount of the deforming portion 8b can be ensured without raising the hood position. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle bonnet hinge structure, and more particularly to a vehicle bonnet hinge structure capable of absorbing a load on the bonnet.

[0002]

2. Description of the Related Art Conventionally, in a hood of a vehicle, it has been desired to suppress damage to a pedestrian at the time of a collision with a pedestrian as much as possible. A bonnet hinge structure as disclosed in Japanese Patent No. 2,911,948 has been proposed. That is, in a bonnet hinge that connects the bonnet to the vehicle body in an openable and closable manner, the vehicle body side hinge fixed to the vehicle body side and the vehicle body side hinge are disposed so as to face each other and fixed to the bonnet and the vehicle body side hinge. It has been proposed to provide a bonnet side hinge, and to form a bent portion that buckles and absorbs a shock when a load is applied to the bonnet, on one of both hinges. According to such prior art,
When a pedestrian collides with the bonnet, the hinge buckles and the shock is absorbed, so damage to the pedestrian can be reduced.

[0003]

However, the above-mentioned prior art has the following problems. (1) It is not possible to achieve both the degree of freedom in vehicle design and the impact absorption effect. That is, in order to secure a sufficient shock absorbing effect, it is necessary to lengthen the buckling stroke of the bent portion (the amount of displacement of the bent portion when the bent portion buckles). The length of the vehicle in the vertical direction needs to be sufficiently long. However, according to the above-mentioned prior art, since the bending portion for absorbing the shock is located between the vehicle body and the hood, the length of the bending portion in the up-down direction of the vehicle is set to be sufficiently long. The longer the bending stroke, the higher the position of the bonnet.
However, there are cases where it is desired to lower the bonnet position due to the design of the vehicle, and if the bonnet position is raised with the impact absorption effect being emphasized as described above, the degree of freedom in design is limited. (2) It is impossible to obtain a proper shock absorbing force with respect to the displacement amount of the bonnet. That is, according to the above-mentioned prior art, when a load acts on the bonnet, the reaction force of the bent portion increases, and when the reaction force reaches a predetermined value, the bent portion buckles. At that time, the reaction force sharply decreases, and the buckling progresses due to the decreased reaction force. Therefore, there is a problem that the impact cannot be sufficiently absorbed and the impact absorbing power is reduced.

The present invention has been made in consideration of the above problems, and an object thereof is to provide a bonnet hinge structure for a vehicle capable of improving impact absorption while suppressing the influence on the degree of freedom in design. Especially.

[0005]

In order to achieve the above object, the present invention has the following means for solving the problem. That is, in the first configuration of the present invention, the bonnet arranged in the upper part of the engine room formed in the front part of the vehicle is swung in the vertical direction of the vehicle with respect to the vehicle body side part located on the side of the engine room. A bonnet hinge structure for a vehicle including a hinge member that freely supports, wherein the hinge member includes a vehicle body side hinge member attached to the vehicle body side portion, and a vehicle width direction inner side of the vehicle body inward of the vehicle body side hinge member. And a bonnet side hinge member having one end attached to the bonnet and the other end swingably attached to the vehicle body side hinge member in the vertical direction of the vehicle. Attaches the attachment portion to be attached to the vehicle body side portion, connects the attachment portion and the bonnet side hinge member, and attaches the attachment portion and the bonnet. Is disposed on the lower side of the vehicle than the mounting portion between the up side hinge member,
The vehicle includes a deformable portion that is capable of deforming the vehicle downward. According to the first configuration of the present invention, first, the bonnet side hinge member is arranged offset with respect to the vehicle body side hinge member inwardly of the vehicle body in the vehicle width direction, so that the interior of the engine room is provided as a space in which the hinge member is deformed. Since it can be utilized, it becomes possible to sufficiently secure the displacement stroke amount by which the hinge member is deformed. The bonnet position can be lowered by disposing the deformation portion that absorbs the impact on the vehicle lower side than the attachment portion of the vehicle body side hinge member, and therefore the bonnet position can be increased as in the conventional technique. Therefore, the displacement stroke amount of the deformed portion can be sufficiently secured, and the influence on the design flexibility can be suppressed.

In the second structure of the present invention, one end of the deformable portion is connected to the mounting portion, and
A first vertical portion, the other end of which extends below the mounting portion of the vehicle, and one end of which is connected to the other end of the first vertical portion, and the other end of which extends inward in the vehicle width direction of the vehicle. And a second vertical portion, one end of which is connected to the other end of the bottom portion and the other end of which is extended to the upper side of the vehicle and which is connected to the bonnet side hinge member. I am doing it. According to the 2nd structure of this invention, a deformation | transformation part is formed in a substantially U-shaped cross section comprised from a 1st vertical part, a bottom part, and a 2nd vertical part. Therefore, when an impact is applied to the bonnet, the second vertical portion is first displaced to the lower side of the vehicle by the impact, and accordingly, the bottom portion pivots downward with the connecting portion with the first vertical portion as a base point, and this bottom portion The lower end of the second vertical portion is deformed toward the first vertical portion so that the deformed portion is deformed to the lower side of the vehicle while maintaining the U-shape. ,
The deformation can absorb the shock.

Further, in the third structure of the present invention, the first vertical portion is arranged so as to be along the inner side surface of the engine room at the side portion of the vehicle body. According to the third configuration of the present invention, when the second vertical portion is displaced to the lower side of the vehicle by the impact on the bonnet, the first vertical portion is guided by the vehicle body side portion and is displaced parallel to the vehicle body side portion. Therefore, the bonnet side hinge member is suppressed from falling in the vehicle width direction,
The bonnet can be reliably displaced to the lower side of the vehicle.

In the fourth structure of the present invention, in the deforming portion, the reaction force increases at a substantially constant increase rate in proportion to the amount of movement of the bonnet to the lower side of the vehicle, and the reaction force increases. When the predetermined reaction force is reached, it is deformable so that the predetermined reaction force is maintained. According to the above-described prior art, as shown by the wavy line in FIG. 6, the bent portion is proportional to the movement amount of the bonnet until the reaction force with respect to the movement amount of the bonnet reaches the predetermined reaction force (first predetermined reaction force). The elastic force deforms so that the reaction force increases, and after reaching the predetermined reaction force (first predetermined reaction force), the reaction force decreases due to the buckling of the bent portion, and the buckling progresses with this decreased reaction force. Therefore, the impact absorption corresponding to the increase in the bonnet movement amount (increase in impact force) is not sufficiently performed. According to the fourth configuration of the present invention, in the deformable portion, the reaction force increases at a substantially constant increase rate in proportion to the movement amount of the bonnet, and when the reaction force reaches the predetermined reaction force, the predetermined reaction force is generated. Is maintained so that it can be maintained, for example, the substantially U-shape mentioned in the above-mentioned second configuration. Therefore, as shown by the solid line in FIG. 6, the reaction force is maintained at the predetermined reaction force (second predetermined reaction force) even after the reaction force with respect to the movement amount of the bonnet reaches the predetermined reaction force. When formed in a substantially U-shape, the deforming portion deforms while maintaining the substantially U-shape so that the reaction force is maintained at the predetermined reaction force (second predetermined reaction force).
It is possible to suppress a decrease in reaction force with respect to an increase in the amount of movement of the bonnet, and to suppress a decrease in impact absorption power.

Further, in the fifth structure of the present invention, the bonnet arranged in the upper part of the engine room formed in the front part of the vehicle is arranged in the vertical direction of the vehicle with respect to the side part of the vehicle body located on the side of the engine room. A bonnet hinge structure for a vehicle, comprising a hinge member swingably supported on a vehicle body side hinge member attached to the vehicle body side portion, and a vehicle width direction vehicle more than the vehicle body side hinge member. The bonnet side hinge member is disposed inside the body and has one end attached to the bonnet and the other end attached to the vehicle body side hinge member so as to be swingable in the vertical direction of the vehicle. The side hinge member connects the attachment portion to be attached to the vehicle body side portion, the attachment portion and the bonnet side hinge member, and connects the attachment portion to the upper portion. And a deformation portion configured to be deformable to a lower side of the vehicle between the bonnet side hinge member, and the deformation portion is configured in a substantially U shape having a bottom portion on a lower side of the vehicle. The reaction force increases at a substantially constant rate of increase in proportion to the amount of movement of the bonnet to the lower side of the vehicle, and when the reaction force reaches a predetermined reaction force, it is deformable so as to maintain the predetermined reaction force. It is configured to. According to the fifth configuration of the present invention, the deformable portion is formed in a substantially U shape having a bottom portion on the lower side of the vehicle, and the reaction force increases at a substantially constant increase rate in proportion to the movement amount of the bonnet. At the same time, when the reaction force reaches the predetermined reaction force, it is deformable so that the predetermined reaction force is maintained. Therefore, as shown by the solid line in FIG. 1, the reaction force is maintained at the predetermined reaction force (second predetermined reaction force) by deforming while maintaining the substantially U shape without breaking the deformation portion. It is possible to suppress a decrease in reaction force with respect to an increase in the amount of movement of the bonnet, and to suppress a decrease in impact absorption power.

[0010]

According to the present invention, the impact absorbing power can be improved while suppressing the influence on the design flexibility.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
5 to 5. 1 is a structural view of a vehicle body in the vicinity of an engine room in front of the vehicle to which a hinge member is attached (a hood is omitted), FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a diagram showing a hinge member on the vehicle body side, and FIG. The figure which shows the bonnet side hinge member, FIG. 5 is the figure which shows the deformation | transformation state of a bonnet, FIG.
FIG. 6 is a characteristic diagram showing a characteristic of a reaction force with respect to a movement amount of a hood.

1 and 2, 1 is an outer panel 1.
a hood composed of a and an inner panel 1b,
Reference numeral 2 is a fender, and 3 and 4 are an apron rain and a wheel apron arranged below the fender 2. As shown in FIG. 1, the apron rain 3 is connected to the cowl box 5 and defines an engine room R together with the apron rain 3. Incidentally, 6 is a front pillar. Then, the hinge member 7 that supports the bonnet 1 so as to be swingable in the vertical direction of the vehicle with respect to the vehicle body is the inner panel 1b.
And the apron rain 3 are provided so as to be connected to each other. The hinge member 7 is a vehicle-body-side hinge member 8 attached to the apron rain 3 as a vehicle-body side portion, a vehicle-body-side hinge member 8 is offset from the vehicle-body-side hinge member 8 inward of the vehicle width, and is attached to the inner panel 1b. And the side hinge member 9.

The body side hinge member 8 is formed of an apron rain 3
Mounting portion 8a mounted on the upper surface of the
The deformable portion 8b extends from a to the bonnet side hinge member 9, is connected to the bonnet side hinge member 9, and is deformable toward the lower side of the vehicle. As shown in FIG. 3, the deforming portion 8b has one end connected to the mounting portion 8a and the other end extending parallel to the apron rain 3 below the mounting portion 8a of the vehicle. A first vertical portion 8c, a bottom portion 8d having one end connected to the other end of the first vertical portion 8c, the other end extending inward in the vehicle width direction of the vehicle, and the other end of the bottom portion 8d at one end. And a second vertical portion 8e which is connected to the bonnet side hinge member 9 and has the other end extended above the vehicle and has a substantially U-shape.

The bonnet side hinge member 9 is shown in FIG.
As shown in FIG. 5, the vehicle body side hinge member 8 is formed in an arm shape extending in the vehicle width front-rear direction and is swingable in the vertical direction of the vehicle with the fixing portion 9a to the vehicle body side hinge member 8 as a base point. The fixed portion 9a is connected to the vehicle body side hinge member 8.

As described above, according to this embodiment, the following operational effects can be obtained. Since the bonnet side hinge member 9 is offset inward in the vehicle width direction with respect to the vehicle body side hinge member 8, the engine room R can be used as a space in which the deforming portion 8b is displaced. It is possible to secure a sufficient displacement stroke amount that is displaced to the lower side of the vehicle. By disposing the deformation portion 8b that absorbs the impact on the vehicle lower side than the attachment portion 8a of the vehicle body side hinge member 8, the bonnet position can be lowered, so that the position of the bonnet can be reduced as in the prior art. Deformation part 8b without raising
It is possible to secure a sufficient amount of displacement stroke and to suppress the influence on the degree of freedom in design.

Further, the deformable portion 8b is formed in a substantially U shape from the first vertical portion 8c, the bottom portion 8d and the second vertical portion 8e, and the reaction force with respect to the movement amount of the bonnet 1 reaches a predetermined reaction force. The reaction force is maintained at a predetermined reaction force even after the above.
Explaining one example based on FIG. 5, first, the solid line is before deformation, the wavy line is after deformation, one end of the second vertical portion 8e before deformation is A, and one end A of the second vertical portion 8e before deformation is slightly larger. The upper side portion is B, one end of the deformed second vertical portion 8e is A ', and the portion slightly above the one end A of the deformed second vertical portion 8e is B'.
As described below. If an impact is applied to the bonnet 1 and the bonnet 1 is displaced downward by a predetermined amount α, one end A of the second vertical portion 8e becomes the other end position of the first vertical portion 8c along with the displacement. Until the predetermined position B of the second vertical portion 8e is sequentially displaced to the position of one end A of the second vertical portion 8e,
The deforming portion 8b is deformed while being extended downward while maintaining its U-shape. Therefore, as shown in FIG. 6, the reaction force is elastically deformed so that the reaction force increases in proportion to the movement amount of the bonnet 1 until the reaction force reaches the second predetermined reaction force, and the reaction force is changed to the second predetermined reaction force. After the force is reached, the second predetermined reaction force is maintained, so that the reaction force does not decrease even if the movement amount of the bonnet 1 increases, and thus it is possible to suppress the decrease in the impact absorption force.

Further, since the first vertical portion 8c is arranged in parallel with the apron rain 3, the deformation portion 8b is downwardly of the vehicle in the order of the second vertical portion 8e, the bottom portion 8d, and the first vertical portion 8c due to the impact on the bonnet 1. When displaced to the side, the first vertical portion 8c
Since the hood side hinge member 9 is guided by the apron rain 3 and is displaced in parallel to the side surface of the apron rain 3, the bonnet side hinge member 9 is prevented from falling in the vehicle width direction, and the bonnet 1 can be reliably displaced to the lower side of the vehicle. .

In this embodiment, the deformable portion 8b is substantially U-shaped.
Although an example in which the bottom portion 8d is omitted is shown as an example of the V-shaped configuration,
You may make it comprised in a character shape. However, as described above, it is desirable that the deformable portion 8b be formed in a substantially U-shape in order to suppress the reduction of the impact absorbing power.

[Brief description of drawings]

FIG. 1 is a structural diagram of a vehicle body near an engine room in front of the vehicle.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view showing a vehicle body side hinge member.

FIG. 4 is a view showing a bonnet side hinge member.

FIG. 5 is a diagram showing a deformed state of a bonnet.

FIG. 6 is a characteristic diagram showing a characteristic of a reaction force with respect to a movement amount of a bonnet.

[Explanation of symbols]

1: Bonnet 3: Apron rain (vehicle body side) 7: Hinge member 8: Body side hinge member 8a: Mounting part 8b: Deformation part 8c: First vertical portion 8d: bottom 8e: Second vertical portion 9: Hinge member on bonnet side R: Engine room

Claims (5)

[Claims] 1. A hinge member for supporting a bonnet arranged in an upper part of an engine room formed in a front part of a vehicle so as to be swingable in a vertical direction of a vehicle with respect to a side part of a vehicle body located laterally of the engine room. A bonnet hinge structure for a vehicle, comprising: a hinge member mounted on the vehicle body side portion; and a hinge member disposed inside the vehicle body in the vehicle width direction with respect to the vehicle body side hinge member. The bonnet side hinge member is attached to the bonnet and has the other end swingably attached to the vehicle body side hinge member in the vertical direction of the vehicle. The vehicle body side hinge member is the vehicle body side portion. A mounting portion to be mounted on the bonnet side hinge member, and the mounting portion and the bonnet side hinge member are connected to each other. A bonnet hinge structure for a vehicle, characterized in that the bonnet hinge structure includes a deformable portion that is disposed below the vehicle with respect to the attachment portion and that is capable of deforming the vehicle downward. 2. The deformable portion has a first vertical portion, one end of which is connected to the mounting portion and the other end of which extends below the mounting portion of the vehicle, and one end of which is the first vertical portion. A bottom part that is connected to the other end of the vehicle part and that extends to the inside of the vehicle in the vehicle width direction of the vehicle, and one end that is connected to the other end of the bottom part and the other end is above the vehicle. The bonnet hinge structure for a vehicle according to claim 1, wherein the bonnet hinge structure comprises a second vertical portion that is extended to the bonnet side hinge member and is connected to the bonnet side hinge member. 3. The bonnet hinge structure for a vehicle according to claim 2, wherein the first vertical portion is arranged along an inner side surface of the vehicle body side portion inside the engine room. 4. The deforming portion increases the reaction force at a substantially constant increase rate in proportion to the amount of movement of the bonnet to the lower side of the vehicle, and when the reaction force reaches a predetermined reaction force, the predetermined amount. The bonnet hinge structure for a vehicle according to claim 1, wherein the bonnet hinge structure is deformable so that a reaction force is maintained. 5. A hinge member for supporting a bonnet arranged in an upper part of an engine room formed in a front part of a vehicle so as to be swingable in a vertical direction of a vehicle with respect to a side part of a vehicle body located laterally of the engine room. A bonnet hinge structure for a vehicle, comprising: a hinge member mounted on the vehicle body side portion; and a hinge member disposed inside the vehicle body in the vehicle width direction with respect to the vehicle body side hinge member. The bonnet side hinge member is attached to the bonnet and has the other end swingably attached to the vehicle body side hinge member in the vertical direction of the vehicle. The vehicle body side hinge member is the vehicle body side portion. A mounting portion to be mounted on the bonnet side hinge member, and the mounting portion and the bonnet side hinge member are connected to each other. And a deformable portion configured to be deformable to a lower side of the vehicle, the deformable portion having a substantially U shape having a bottom portion on the lower side of the vehicle, and the bonnet lower side of the vehicle. The reaction force increases at a substantially constant rate of increase in proportion to the amount of movement to the, and when the reaction force reaches a predetermined reaction force, the reaction force is deformable so that the predetermined reaction force is maintained. The bonnet hinge structure of the vehicle.