JP2007308111A - Hood structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hood structure capable of reducing impact added on a collision element when a collision element collides with a hood. <P>SOLUTION: In the hood 10, a slit 28 is formed at a bending portion 24 part of an inner panel 16, and the stiffness of the inner panel 16 is lowered at the bending portion 24 part. Therefore, when the collision element collides with an outer peripheral portion of the hood 10 from an upper side, even if pulling force to a center side of an outer panel 14 acts on a clipping portion 20 of the outer panel 14, the inner panel 16 is easily deformed to the center side by the slit 28 at the bending portion 24 part, and moving amount of the clipping portion to the center side of the outer panel 14 to the inner panel 16 is increased. Therefore, the outer panel 14 can sufficiently deform/move into a recessed portion 26 of the inner panel 16, and impact which the hood 10 adds to the collision element can be reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hood structure in which an outer panel and an inner panel are coupled at an outer peripheral end portion of a hood.

  As a hood structure, there is a hood structure in which a joint portion in the peripheral portion of the outer panel and a joint portion in the peripheral portion of the inner panel are joined, and a slit is provided in the joint portion of the inner panel (see, for example, Patent Document 1). .

Here, in such a hood structure, when the collision body collides with the hood, it is possible to reduce the impact given to the collision body by increasing the amount of movement of the outer panel with respect to the inner panel at the outer peripheral portion of the hood.
Japanese Patent Laid-Open No. 61-238576

  An object of the present invention is to obtain the hood structure which can reduce the impact given to a collision object when a collision object collides with the hood in consideration of the above-mentioned fact.

  The hood structure according to claim 1 includes an outer panel provided on a front side of a hood of a vehicle, an inner panel provided on a back side of the hood, a clamping portion provided on an outer peripheral end of the outer panel, and the inner Provided at the outer peripheral end of the panel, provided at a portion other than the corner portion at the outer peripheral portion of the hood, and the sandwiched portion where the outer panel and the inner panel are joined by being sandwiched by the sandwiching portion, And an increasing means for increasing the amount of movement of the outer panel relative to the inner panel at the outer periphery of the hood when a collision body collides with the hood.

  A hood structure according to a second aspect is the hood structure according to the first aspect, characterized in that the increasing means are arranged at intervals along the outer periphery of the hood.

  According to a third aspect of the present invention, in the hood structure according to the first or second aspect, the increasing means includes a rigidity reducing portion that decreases the rigidity of at least one of the outer panel and the inner panel. It is a feature.

  The hood structure according to claim 4 is the hood structure according to any one of claims 1 to 3, wherein the increasing means is a strength decreasing portion that decreases a coupling strength between the outer panel and the inner panel. It is characterized by having.

  The hood structure according to a fifth aspect is the hood structure according to any one of the first to fourth aspects, wherein the increasing means is configured so that the collision portion collides with the hood when the collision body collides with the hood. It is characterized by permitting entry into the holding part.

  In the hood structure according to claim 1, the outer panel is provided on the front side of the hood, the inner panel is provided on the back side of the hood, and the clamping portion provided on the outer peripheral end portion of the outer panel is the outer peripheral end portion of the inner panel. The outer panel and the inner panel are coupled by sandwiching the sandwiched portion provided on the outer panel.

  Here, when the collision body collides with the hood, the increasing means provided in the outer peripheral portion of the hood increases the amount of movement of the outer panel with respect to the inner panel in the outer peripheral portion of the hood. For this reason, the impact given to a collision body can be reduced.

  In the hood structure according to the second aspect, the increasing means are arranged at intervals along the outer periphery of the hood. For this reason, the rigidity fall of a hood can be suppressed appropriately.

  In the hood structure according to the third aspect, the increasing means has a rigidity reduction portion that reduces the rigidity of at least one of the outer panel and the inner panel. For this reason, when a colliding body collides with the hood, at least one of the outer panel and the inner panel is easily deformed by the rigidity reduction portion, so that the amount of movement of the outer panel with respect to the inner panel can be increased at the outer peripheral portion of the hood. .

  In the hood structure according to the fourth aspect, the increasing means has a strength decreasing portion that decreases the coupling strength between the outer panel and the inner panel. For this reason, when a colliding body collides with the hood, the outer panel is easily moved by the strength reduction portion, so that the amount of movement of the outer panel with respect to the inner panel can be increased at the outer peripheral portion of the hood.

  In the hood structure according to the fifth aspect, when the collision body collides with the hood, the increasing means permits the entry of the sandwiched portion into the sandwiched portion. For this reason, the moving amount | distance with respect to the inner panel of an outer panel can be increased in the outer peripheral part of a hood.

[First Embodiment]
FIG. 1 is a cross-sectional view of a hood 10 (bonnet) of a vehicle according to a first embodiment configured by applying the hood structure of the present invention as viewed from the left side of the vehicle (a cross section along line 1-1 in FIG. 2). Figure). Further, FIG. 2 shows a rear view of the hood 10 as seen from the lower side of the vehicle, and FIG. 3 shows an outer peripheral portion of the hood 10 on the rear side of the vehicle as seen from the lower side of the vehicle. ing. In the drawings, the front side of the vehicle is indicated by an arrow FR, the left side of the vehicle is indicated by an arrow LH, and the upper side is indicated by an arrow UP.

  The hood 10 according to the present embodiment has a substantially rectangular shape in plan view, and the hood 10 is closed to close the engine room 12 (engine compartment) at the front of the vehicle from above.

  The hood 10 is provided with a front side (upper side) substantially rectangular plate-like outer panel 14 and a back side (lower side) substantially rectangular plate-like inner panel 16, and the four corners 10 </ b> A of the hood 10 are provided. The outer panel 14 and the inner panel 16 are joined together by forming a hemming portion 18 (caulking portion) at the outer peripheral end portion.

  A clamping part 20 having a U-shaped cross section is formed at the outer peripheral end of the outer panel 14 at the position where the hemming part 18 is formed. The clamping part 20 has a bent part 20A formed on the outer peripheral edge of the outer panel 14 on the back side. It is bent to the (lower side).

  A flat plate-shaped sandwiched portion 22 is formed at the outer peripheral end of the inner panel 16, and the sandwiched portion 22 is sandwiched by the sandwiching portion 20 of the outer panel 14 so that the outer panel 14 and the inner panel 16 are sandwiched. The portion 20 and the sandwiched portion 22 are joined by caulking. A predetermined amount of fine beads (not shown) made of glass or the like are sandwiched between the sandwiching portion 20 and the sandwiched portion 22, and the beads are subjected to frictional force between the sandwiching portion 20 and the sandwiched portion 22. Is increased, the coupling force between the sandwiching portion 20 and the sandwiched portion 22 is enhanced. Further, an adhesive (not shown) is applied and bonded between the front end portion of the bent portion 20A of the outer panel 14 (the central side portion of the outer panel 14) and the sandwiched portion 22 of the inner panel 16.

  The inner panel 16 is formed with irregularities mainly in the outer peripheral portion, thereby increasing the section modulus of the inner panel 16. For this reason, the rigidity of the hood 10 is ensured by the concavity and convexity of the inner panel 16 in addition to the coupling at the hemming portion 18 between the outer panel 14 and the inner panel 16.

  The inner panel 16 is formed with a bent portion 24 at the center side of the sandwiched portion 22, and the inner panel 16 is bent at the bent portion 24, so that the inner panel 16 is centered with respect to the bent portion 24. In the side portion, the outer panel 14 is spaced downward.

  The inner panel 16 is formed with a recessed portion 26 having a substantially inverted trapezoidal cross section on the center side from the bent portion 24, and the inner panel 16 is formed in a shape recessed downward in the recessed portion 26. However, the space between the outer panel 14 and the recess 26 is enlarged.

  In the inner panel 16, a plurality of rectangular slits 28 are formed through the bent portion 24 as rigidity reducing portions of the increasing means, and the plurality of slits 28 are arranged along the bent portion 24. These are arranged at equal intervals along the outer periphery of the hood 10 (the outer periphery of the inner panel 16). Thereby, the rigidity of the inner panel 16 is reduced at the bent portion 24 (in the vicinity of the sandwiched portion 22).

  In addition, the outer peripheral portion of the rear surface (lower surface) of the hood 10 on the rear side of the vehicle is supported on the vehicle body side via hood hinges (not shown) at both ends in the vehicle width direction. It is made to be able to rotate, and can be opened and closed. A hood damper (not shown) is disposed below the outer periphery of both sides of the hood 10 in the vehicle width direction. The hood damper is spanned between the hood 10 and the vehicle body side so that the hood 10 is opened. To prevent it from being closed by its own weight.

  Further, a suspension tower (not shown) on the vehicle body side is disposed below the outer periphery of the hood 10 on both sides in the vehicle width direction, and the suspension tower supports the suspension of the front wheels of the vehicle. A cowl (not shown) on the vehicle body side is disposed below the outer peripheral portion of the hood 10 on the vehicle rear side, and the cowl covers the vehicle body below the outer peripheral portion of the hood 10 on the vehicle rear side.

  As described above, there are a hood hinge, a hood damper, a suspension tower (suspension), a cowl, and the like below the outer peripheral portion of the hood 10. A sufficient space (gap) is provided below the outer peripheral portion of the hood 10. Is not secured.

  Next, the operation of the present embodiment will be described.

  In the hood 10 having the above configuration, for example, as shown in FIG. 4, when the collision body 30 (for example, a pedestrian's head) collides with the outer peripheral portion on the rear side of the vehicle from above, the outer panel 14 is lowered with respect to the inner panel 16. When the outer panel 14 is deformed and moved to the side, a pulling force to the center side of the outer panel 14 (vehicle front side) acts on the holding portion 20 on the rear side of the outer panel 14.

  Here, a plurality of slits 28 are formed in the bent portion 24 portion of the inner panel 16, the rigidity of the inner panel 16 is reduced in the bent portion 24 portion, and the inner panel 16 is easily deformed in the bent portion 24 portion. Has been.

  For this reason, even when a collision body 30 collides from the upper side with the outer peripheral portion of the hood 10 on the rear side of the vehicle, even if a tensile force toward the center side of the outer panel 14 acts on the holding portion 20 of the outer panel 14 on the rear side of the vehicle. The panel 16 is easily deformed to the center side (vehicle front side) by the plurality of slits 28 at the bent portion 24 on the vehicle rear side, and the amount of movement of the vehicle rear side clamping portion 20 toward the outer panel 14 center side with respect to the inner panel 16 Is increased.

  Thereby, even if the hood 10 (inner panel 16) does not contact the lower vehicle body, the outer panel 14 can be sufficiently deformed and moved into the recess 26 of the inner panel 16, and the hood 10 can apply the collision load of the collision body 30. It can be absorbed sufficiently. Therefore, even when a sufficient space (gap) is not secured below the outer periphery of the hood 10 as in the present embodiment, a plurality of slits 28 are not formed in the inner panel 16 as shown in FIG. Compared to the dotted line B), the impact of the hood 10 on the collision body 30 in the latter half of the collision of the collision body 30 with the hood 10 can be reduced (see the solid line A).

  A plurality of slits 28 are arranged along the outer periphery of the hood 10 at intervals. For this reason, the rigidity fall of the hood 10 can be suppressed appropriately.

  In the present embodiment, the slit 28 (rigidity reduction portion) is formed in the inner panel 16, but the slit 28 (rigidity reduction portion) is formed in at least one of the outer panel 14 and the inner panel 16. That's fine.

  Further, in the present embodiment, the slit 28 is formed as the rigidity reduction portion, but a concave notch may be formed as the rigidity reduction portion.

[Second Embodiment]
FIG. 6 shows a rear view of the outer periphery of the rear side of the hood 50 (bonnet) of the vehicle according to the second embodiment configured by applying the hood structure of the present invention as seen from the lower side of the vehicle. Has been. 7A and 7B show a cross-sectional view of the outer periphery of the hood 50 on the rear side of the vehicle as viewed from the left side of the vehicle. FIG. A cross-sectional view taken along line AA is shown, and FIG. 7B shows a cross-sectional view taken along line BB in FIG.

  The hood 50 according to the present embodiment has substantially the same configuration as that of the first embodiment, but differs in the following points.

  In the hood 50 according to the present embodiment, the inner panel 16 is not provided with the plurality of slits 28 in the first embodiment.

  The sandwiched portion 22 of the inner panel 16 is formed with a plurality of trapezoidal cutout portions 52 as a rigidity reduction portion and a strength reduction portion of the increase means, and the plurality of cutout portions 52 are formed on the outer periphery of the hood 50 (inner Are arranged at equal intervals along the outer periphery of the panel 16 and open to the outer periphery of the inner panel 16. As a result, the rigidity of the inner panel 16 is reduced at the sandwiched portion 22 portion, the inner panel 16 is easily deformed at the sandwiched portion 22 portion, and the sandwiched portion 20 of the outer panel 14 is sandwiched at the notched portion 52 portion. Thus, the coupling strength between the sandwiched portion 20 and the sandwiched portion 22 is reduced without being sandwiched between the sandwiched portion 20 and the sandwiched portion 20 is easily moved at the notch 52 portion relative to the sandwiched portion 22.

  For this reason, for example, when the collision body 30 collides from the upper side with the outer peripheral portion of the hood 50 on the rear side of the vehicle, a pulling force toward the center side of the outer panel 14 (front side of the vehicle) acts on the holding portion 20 on the rear side of the outer panel 14. Even so, the inner panel 16 is easily deformed to the center side (the vehicle front side) by the plurality of notches 52 in the portion 22 to be clamped on the rear side of the vehicle, or the pinching portion 20 on the vehicle rear side becomes the pinched portion 22. On the other hand, it is easily moved to the center side of the outer panel 14 at the notch 52 portion, and the amount of movement of the clamping portion 20 on the vehicle rear side relative to the inner panel 16 toward the center side of the outer panel 14 is increased.

  Thereby, also in this embodiment, the same effect as the first embodiment can be obtained.

[Third Embodiment]
FIG. 8 shows a rear view of the outer peripheral portion of the rear side of the hood 60 (bonnet) of the vehicle according to the third embodiment configured by applying the hood structure of the present invention as seen from the lower side of the vehicle. Has been. Further, FIGS. 9A and 9B show a cross-sectional view of the outer periphery of the rear side of the hood 60 as viewed from the left side of the vehicle. FIG. A cross-sectional view taken along line AA is shown, and FIG. 8B shows a cross-sectional view taken along line BB in FIG.

  The hood 60 according to the present embodiment has substantially the same configuration as that of the first embodiment, but differs in the following points.

  In the hood 60 according to the present embodiment, the inner panel 16 is not provided with the plurality of slits 28 in the first embodiment.

  A plurality of trapezoidal cutout portions 62 as a rigidity reduction portion and a strength reduction portion of the increasing means are formed through the bent portion 20A of the sandwiching portion 20 of the outer panel 14, and the plurality of cutout portions 62 are formed on the hood 60. They are arranged at equal intervals along the outer periphery (the outer periphery of the outer panel 14), and open to the center side of the outer panel 14. As a result, the rigidity of the outer panel 14 is reduced at the sandwiching portion 20 portion so that the outer panel 14 is easily deformed at the sandwiching portion 20 portion, and the sandwiching portion 20 can sandwich the sandwiched portion 22 of the inner panel 16 at the notch portion 62 portion. Accordingly, the coupling strength between the sandwiching portion 20 and the sandwiched portion 22 is reduced, and the sandwiching portion 20 is easily moved at the notch 62 portion with respect to the sandwiched portion 22.

  For this reason, for example, when the collision body 30 collides with the outer peripheral portion of the hood 60 on the rear side of the vehicle from the upper side, a pulling force to the center side (front side of the vehicle) of the outer panel 14 acts on the holding portion 20 on the rear side of the outer panel 14. Even in this case, the outer panel 14 is easily deformed by the plurality of notches 62 in the holding part 20 on the rear side of the vehicle, or the center of the outer panel 14 in the notch 62 part of the holding part 20 on the rear side of the vehicle with respect to the held part 22. The movement amount to the center side of the outer panel 14 with respect to the inner panel 16 of the holding portion 20 on the rear side of the vehicle is increased.

  Thereby, also in this embodiment, the same effect as the first embodiment can be obtained.

[Fourth Embodiment]
FIG. 10A is a cross-sectional view of an outer peripheral portion of the vehicle rear side of a vehicle hood 70 (bonnet) according to a fourth embodiment configured by applying the hood structure of the present invention as viewed from the left side of the vehicle. It is shown in the figure.

  The hood 70 according to the present embodiment has substantially the same configuration as that of the first embodiment, but differs in the following points.

  In the hood 70 according to the present embodiment, the inner panel 16 is not provided with the plurality of slits 28 in the first embodiment.

  The sandwiched portion 22 of the inner panel 16 has a width shorter than that of the first embodiment as a strength reducing portion of the increasing means, and the sandwiched portion 22 is sandwiched by the sandwiching portion 20 of the outer panel 14. While the width is shortened, the width at which the sandwiching portion 20 does not sandwich the sandwiched portion 22 is lengthened. Thereby, the coupling strength between the sandwiching portion 20 and the sandwiched portion 22 is reduced, and the sandwiching portion 20 is easily moved relative to the sandwiched portion 22.

  For this reason, for example, as shown in FIG. 10B, when the collision body 30 collides from the upper side with the outer peripheral portion of the hood 70 on the rear side of the vehicle, the outer panel 14 center side (vehicle Even if a pulling force to the front side) is applied, the coupling between the clamping part 20 on the rear side of the vehicle and the clamping part 22 of the inner panel 16 is easily released, and the inner panel into the clamping part 20 on the rear side of the vehicle By allowing the 16 sandwiched portions 22 and the bent portion 24 to enter, the amount of movement of the sandwiched portion 20 on the vehicle rear side relative to the inner panel 16 toward the center of the outer panel 14 is increased.

  Thereby, also in the present embodiment, the same effects as those of the first embodiment can be obtained except for the effect obtained by arranging the plurality of slits 28 at intervals along the outer periphery of the hood 10.

  In the present embodiment, as the strength reducing portion of the increasing means, a configuration in which the amount of beads sandwiched between the sandwiching portion 20 and the sandwiched portion 22 is reduced, or between the sandwiching portion 20 and the sandwiched portion 22 It is good also as a structure which does not clamp a bead between.

It is sectional drawing (1-1 sectional view taken on the line of FIG. 2) seen from the vehicle left side which shows the hood in the 1st Embodiment of this invention. It is the reverse view seen from the vehicle lower part which shows the hood in the 1st Embodiment of this invention. It is the reverse view seen from the vehicle lower part which shows the outer peripheral part of the vehicle rear side of the hood in the 1st Embodiment of this invention. It is sectional drawing seen from the vehicle left side which shows the collision body collision at the hood in the 1st Embodiment of this invention. It is a graph which shows the relationship between the deformation | transformation stroke of the hood at the time of the collision body collision with the hood in the 1st Embodiment of this invention, and the impact which a hood gives to a collision body. It is the reverse view seen from the vehicle lower part which shows the outer peripheral part of the vehicle rear side of the hood in the 2nd Embodiment of this invention. (A) And (B) is sectional drawing seen from the vehicle left side which shows the outer peripheral part of the vehicle rear side of the hood in the 2nd Embodiment of this invention, (A) is A- of FIG. It is A sectional drawing, (B) is the BB sectional drawing of FIG. It is the reverse view seen from the vehicle lower part which shows the outer peripheral part of the vehicle rear side of the hood in the 3rd Embodiment of this invention. (A) And (B) is sectional drawing seen from the vehicle left side which shows the outer peripheral part of the vehicle rear side of the hood in the 3rd Embodiment of this invention, (A) is A- of FIG. It is A line sectional drawing, (B) is the BB sectional drawing of FIG. (A) And (B) is sectional drawing seen from the vehicle left side which shows the outer peripheral part of the vehicle rear side of the hood in the 4th Embodiment of this invention, (A) is a figure which shows normal time (B) is a figure which shows the colliding body collision at the time of a hood.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hood 14 Outer panel 16 Inner panel 20 Clamping part 22 Clamped part 28 Slit (increasing means, rigidity reduction part)
30 Colliding body 50 Hood 52 Notch (Increasing means, rigidity reduction part, strength reduction part)
60 Hood 62 Notch (increasing means, rigidity decreasing portion, strength decreasing portion)
70 food

Claims (5)

An outer panel provided on the front side of the hood of the vehicle;
An inner panel provided on the back side of the hood;
A clamping portion provided at an outer peripheral end of the outer panel;
A sandwiched portion provided at an outer peripheral end of the inner panel, and the outer panel and the inner panel being coupled by being sandwiched by the sandwiching portion;
An increasing means that is provided in a portion other than the corner portion in the outer peripheral portion of the hood, and increases the amount of movement of the outer panel relative to the inner panel in the outer peripheral portion of the hood when a collision body collides with the hood.
Hood structure with   The hood structure according to claim 1, wherein the increasing means is disposed at intervals along the outer periphery of the hood.   3. The hood structure according to claim 1, wherein the increasing means includes a rigidity reduction portion that reduces the rigidity of at least one of the outer panel and the inner panel.   The hood structure according to any one of claims 1 to 3, wherein the increasing means includes a strength reducing portion that reduces a coupling strength between the outer panel and the inner panel.   The hood according to any one of claims 1 to 4, wherein the increasing means permits entry of the sandwiched portion into the sandwiched portion when a collision object collides with the hood. Construction.

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