JP4259210B2 - Body front structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle body front part structure, and more particularly to a vehicle body front part structure that protects a collision body in a vehicle such as an automobile in the event of a collision.
[0002]
[Prior art]
Conventionally, in a vehicle body front structure, in an automobile hood (also referred to as an bonnet) in which an inner panel (also referred to as an inner frame) is integrated with an outer panel, the inner panel is formed as a single-piece molded product, and this A configuration in which an opening is formed to reduce the weight of the inner panel and improve the hood rigidity is known (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-321714 (FIGS. 5, 6, and 7)
[0004]
[Problems to be solved by the invention]
However, in Patent Document 1, although the closed section structure is formed by adhering the edge of the opening of the inner panel to the back surface of the outer panel, and the hood rigidity is improved, the collision body is in the front area of the hood. In the case of a collision, the collision load on the collision object is not made uniform regardless of the difference in the vehicle width direction of the collision position.
[0005]
In consideration of the above-described facts, the present invention provides a vehicle body front structure that can uniformly apply a collision load to a collision object regardless of a difference in the vehicle width direction of the collision position when the collision object collides with a front area of a hood. The purpose is to do.
[0006]
According to a first aspect of the present invention, there is provided a vehicle hood comprising: an outer member of a hood that constitutes an outer surface of the vehicle body; and an inner member of the hood that is disposed inside the outer member and has at least one or more openings. When,
Front bumper,
A vehicle body front structure comprising:
The inner member of the hood constitutes a front end portion along the vehicle width direction of the inner member of the hood, becomes a front peripheral edge portion of the opening, and has a shape in the vehicle width center portion in a plan view of the rear end portion. An inner front that has a concave arcuate line shape forward, an inner rear that constitutes a rear end portion of the inner member of the hood, and a rear peripheral edge portion of the opening, and both ends in the vehicle width direction of the inner member of the hood An inner side that is a side peripheral edge of the opening, and a side peripheral edge of the opening that is provided between the inner sides, and is divided into the inner front and the inner front. At least one inner center joined to
And the length along the outer shape of the vehicle body from the front end portion of the front bumper to the front edge of the opening is substantially constant in side cross-sections at all positions in the vehicle width direction of the vehicle body front portion. It is characterized by.
[0007]
Accordingly, the opening of the inner member having at least one opening disposed on the inner side of the outer member of the vehicle hood from the front end portion of the front bumper in the side cross-section at all positions in the vehicle width direction of the front portion of the vehicle body Since the length along the outer shape of the vehicle body to the front edge of the part is substantially constant, no matter which position in the vehicle width direction of the front bumper comes into contact with the collision body, The length along the outer shape of the vehicle body between the position of the upper surface of the hood where the uppermost portion abuts and the front edge of the opening where the hood rigidity changes can be made substantially uniform. As a result, when the collision object collides with the front area of the hood, the collision load on the collision object can be made uniform regardless of the difference in the vehicle width direction of the collision position.
[0008]
According to a second aspect of the present invention, in the vehicle body front structure according to the first aspect, the length from the front end portion of the front bumper to the front end edge of the opening is an arcuate curved line along the outer shape of the vehicle body. It is characterized by being long.
[0009]
Accordingly, the opening of the inner member having at least one opening disposed on the inner side of the outer member of the vehicle hood from the front end portion of the front bumper in the side cross-section at all positions in the vehicle width direction of the front portion of the vehicle body Since the length to the front edge of the part is the length of the arc-shaped curve along the outer shape of the vehicle body, it is almost constant. Even in the case of contact, the length along the vehicle body shape of the position of the upper surface of the hood where the uppermost portion of the collision body contacts and the front edge of the opening where the hood rigidity changes can be made substantially uniform. As a result, when the collision object collides with the front area of the hood, the collision load on the collision object can be made uniform regardless of the difference in the vehicle width direction of the collision position.
According to a third aspect of the present invention, in the vehicle body front portion structure according to the first or second aspect, the at least one inner center is formed with an extending portion from the front end portion toward the vehicle front lower side. The front end edge of the extended portion is joined to the front flange of the inner front.
Therefore, at least one inner center has an outer member and an inner member by joining the front end edge portion of the extending portion formed from the front end portion toward the front lower side of the vehicle body to the front flange of the inner front. Increases the rigidity of the front end of the hood.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a vehicle body front structure according to the present invention will be described with reference to FIGS.
[0011]
In the figure, the arrow UP indicates the upward direction of the vehicle body, and the arrow FR in the figure indicates the forward direction of the vehicle body.
[0012]
As shown in FIG. 3, in this embodiment, a hood 10 of an automobile constitutes an engine panel side portion that is disposed on the inner side of the outer panel 12 as an outer member that constitutes the outer surface of the vehicle body of the hood 10. It is comprised by the inner panel 14 as an inner member.
[0013]
As shown in FIG. 2, the inner panel 14 of the hood 10 includes an inner front 16 constituting a front end portion of the inner panel 14, an inner rear 18 constituting a rear end portion of the inner panel 14, and both end portions in the vehicle width direction of the inner panel 14. The inner side 20 and the left and right inner sides 20 are arranged along the longitudinal direction of the vehicle body, and are composed of three inner centers 22 installed on the inner front 16 and the inner rear 18.
[0014]
As shown in FIG. 3, the rear end portions 22 </ b> A of the three inner centers 22 are joined to the upper surface of the front flange 18 </ b> A of the inner rear 18, and the front end portions 22 </ b> B of the three inner centers 22 are connected to the inner front 16. It is joined to the upper surface of the rear flange 16A. In the inner center 22 disposed in the center in the vehicle width direction, an extending portion 22C is formed from the front end portion 22B toward the lower front side of the vehicle body, and the front end edge portion 22D of the extending portion 22C is The front 16 is joined to the front surface of the front flange 16B.
[0015]
As shown in FIG. 1, the inner panel 14 is extended in the longitudinal direction of the vehicle body by linear left and right inner sides 20 and three inner centers 22 arranged in parallel along the longitudinal direction of the vehicle body. Four openings 30 are formed.
[0016]
The shape of the rear end edge portion 16C of the inner front 16 constituting the front end edge portion 30A of the opening 30 in a plan view is an arcuate line shape in which the central portion in the vehicle width direction is recessed forward of the vehicle body. In the vehicle body of the present embodiment, the length from the front end edge 30A of the opening 30 to the front lower end 40A as the front end portion of the front bumper 40 in the side cross-section at all positions in the vehicle width direction as shown in FIG. The length L is substantially constant L, and the length L from the front lower end 40A of the front bumper 40 to the front end edge 30A of the opening 30 is a line length of an arcuate curve along the outer shape of the vehicle body. ing. In addition, the shape of the front end edge portion 16D of the inner front 16 in a plan view is an arcuate line shape in which the central portion in the vehicle width direction is convex forward of the vehicle body.
[0017]
Next, the operation of this embodiment will be described.
[0018]
In the present embodiment, as shown in FIG. 1, the front end edge 30A of the opening 30 formed in the inner panel 14 is set in an arcuate line shape in which the center in the vehicle width direction is recessed forward of the vehicle body. As shown in FIG. 3, in the vehicle body of the present embodiment, the length L from the front edge 30 </ b> A of the opening 30 to the front lower 40 </ b> A of the front bumper 40 in the side cross-section at all positions in the vehicle width direction. It is almost constant.
[0019]
As a result, when the ground height of the front lower end 40A of the front bumper 40 is H, in the vehicle body of the present embodiment, the front bumper 40 is removed from the front end edge 30A of the opening 30 in the side cross-section at all positions in the vehicle width direction. Therefore, the length L + H reaching the road surface R through the road becomes substantially constant.
[0020]
For this reason, the position of the upper surface of the hood where the upper part of the collision body comes into contact with any position in the vehicle width direction of the front bumper 40 when the collision body elongated in the vertical direction existing on the road surface R comes into contact, Since the length of the opening 30 with the front end edge 30B can be made substantially uniform, when the upper part of the collision body collides with the front region of the hood 10, the collision load on the upper part of the collision body can be made uniform.
[0021]
Further, in the present embodiment, the shape of the rear end edge portion 16C of the inner front 16 in plan view is an arcuate line shape in which the central portion in the vehicle width direction is recessed forward of the vehicle body, and the front end edge of the inner front 16 Since the shape of the portion 16D in plan view is an arcuate line shape in which the center portion in the vehicle width direction is convex forward of the vehicle body, the width of the inner front 16 in the vehicle body longitudinal direction is substantially constant. As a result, the yield at the time of molding the inner front 16 is improved, the productivity is improved, the space for transportation and storage is reduced, and the transportation cost and the management cost can be reduced.
[0022]
Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the above embodiment, four openings 30 are formed in the inner panel 14 of the hood 10, but the number of openings is not limited to four and may be one or more.
[0024]
【The invention's effect】
According to a first aspect of the present invention, there is provided a vehicle hood comprising: an outer member of a hood that constitutes an outer surface of the vehicle body; and an inner member of the hood that is disposed inside the outer member and has at least one opening. And a front bumper, wherein the inner member of the hood constitutes a front end portion along the vehicle width direction of the inner member of the hood, and serves as a front peripheral edge portion of the opening and a rear end portion An inner front in which the shape of the vehicle in the plan view is an arcuate linear shape in which the center of the vehicle width is concave toward the front of the vehicle body, an inner rear that forms the rear edge of the inner member of the hood, and a hood The inner member constitutes both ends in the vehicle width direction of the inner member, the inner side serving as the side peripheral edge of the opening, and the side peripheral edge of the opening provided between the inner sides and the inner front and the divided structure And Comprising at least one inner center joined to the inner front, and the side surface cross-section at all positions in the vehicle body front portion of the vehicle width direction, the vehicle body of the outer shape of the distal end portion of the front bumper to the front edge of the opening The length along the line is almost constant, so that when the collision object collides with the front area of the hood, the excellent effect that the collision load on the collision object can be made uniform regardless of the difference in the vehicle width direction of the collision position Have
[0025]
According to a second aspect of the present invention, in the vehicle body front structure according to the first aspect, the length from the front end portion of the front bumper to the front edge of the opening is a line length of an arcuate curve along the outer shape of the vehicle body. Therefore, when the collision body collides with the front region of the hood, it has an excellent effect that the collision load to the collision body can be made uniform regardless of the difference in the vehicle width direction of the collision position.
In the vehicle body front part structure according to claim 1 or claim 2, the invention according to claim 3 has an extension portion formed from the front end portion toward the vehicle body front lower side in at least one inner center. Since the front end edge portion of the extending portion is joined to the front flange of the inner front, it has an excellent effect that the rigidity of the hood front end portion can be increased.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a vehicle body front part structure according to an embodiment of the present invention as viewed from below a vehicle body.
FIG. 2 is an exploded plan view showing the inner panel of the vehicle body front structure according to the embodiment of the present invention as viewed from the lower side of the vehicle body.
3 is an enlarged cross-sectional view taken along line 3-3 in FIG.
[Explanation of symbols]
10 Hood 12 Outer panel of hood (outer member)
14 Inner panel of hood (inner member)
16 Inner Front 18 Inner Rear 20 Inner Side 22 Inner Center 30 Opening 30A Opening Front Edge 40 Front Bumper

Claims (3)

A vehicle hood comprising: an outer member of a hood that constitutes an outer surface of the vehicle body; and an inner member of the hood that is disposed inside the outer member and has at least one opening;
Front bumper,
A vehicle body front structure comprising:
The inner member of the hood constitutes a front end portion along the vehicle width direction of the inner member of the hood, becomes a front peripheral portion of the opening, and has a shape in the vehicle width center portion in a plan view of the rear end portion. An inner front that is a concave arcuate linear shape, an inner rear that constitutes the rear end of the inner member of the hood, and a rear peripheral edge of the opening, and both ends in the vehicle width direction of the inner member of the hood An inner side that is a side peripheral edge of the opening, a side peripheral edge of the opening that is provided between the inner sides, and is divided into the inner front and the inner front. At least one inner center joined to
And the length along the outer shape of the vehicle body from the front end portion of the front bumper to the front edge of the opening is substantially constant in side cross-sections at all positions in the vehicle width direction of the vehicle body front portion. Body front structure characterized by   The vehicle body front structure according to claim 1, wherein a length from a front end portion of the front bumper to a front end edge portion of the opening is a line length of an arcuate curve along an outer shape of the vehicle body. The at least one inner center is formed with an extending portion from the front end portion toward the lower front side of the vehicle body, and a front end edge portion of the extending portion is joined to a front flange of the inner front. The vehicle body front part structure according to claim 1 or 2.

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