Hood inner panel and vehicle hood

Abstract

To provide a hood inner panel capable of minimizing the amount of intrusion of a panel into a vehicle component in case of a vehicle collision, and a hood for a vehicle including the hood inner panel.SOLUTION: An inner panel 20 of a hood for a vehicle includes first and second bend scheduled parts 21 and 22 which are bent in case of a vehicle collision. The first and second bend scheduled parts have first and second convex parts 23 and 24 respectively which protrude downward. The first convex part 23 has a center section 23a in a center in a vehicle width direction, and an outer section 23b whose backward inclination angle increases as going outward in the vehicle width direction. The second convex part 24 extends in the vehicle width direction and at least partly overlaps the outer section 23b of the first convex part 23 in the vehicle width direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a hood inner panel having a bending portion that bends in the event of a vehicle collision, and a vehicle hood having this inner panel. [Background technology]

[0002] Panels used in vehicle hoods are known that have a bending portion that will bend in the event of a vehicle collision (see, for example, Patent Document 1). Patent Document 1 discloses a synthetic resin panel for an automobile that is a blow-molded product and has an outer skin and a stiffener that is integral with the outer skin, and is used as a bonnet or trunk lid. The stiffener extends in the vehicle body width direction and has a trough-shaped molded portion that protrudes toward the outer skin, and the ridge portion of the trough-shaped molded portion is separated from the outer skin so that an impact force from the front or rear of the vehicle body will cause the panel to bend starting from the trough-shaped molded portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-129529 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the panel described in Patent Document 1, bending that occurs during a vehicle collision is one stage starting from the gutter-shaped portion, and depending on the bending shape of the panel, the amount of penetration of the panel into the vehicle interior can be large.

[0005] The present invention has been made in consideration of the above circumstances, and its purpose is to provide a hood inner panel and a vehicle hood equipped with the same that can reduce the amount of intrusion of the panel into the passenger compartment during a vehicle collision. [Means for solving the problem]

[0006] According to the present invention, there is provided a hood inner panel comprising a first intended bending portion that bends in the event of a vehicle collision, and a second intended bending portion that is disposed rearward of the first intended bending portion, wherein the first intended bending portion and the second intended bending portion have a first convex portion and a second convex portion that are convex downward, respectively, wherein the first convex portion has a central section that extends in the vehicle width direction toward the center in the vehicle width direction, and an outer section that extends from the outer end of the central section in the vehicle width direction outward in the vehicle width direction and has an increasing rearward inclination angle the further outward in the vehicle width direction, and wherein the second convex portion extends in the vehicle width direction and at least a portion of which overlaps with the outer section of the first convex portion in the vehicle width direction.

[0007] In the event of a frontal collision, this hood inner panel bends in two stages, starting from the first bending portion on the front side and the second bending portion on the rear side, thereby reducing the amount of intrusion of the panel into the vehicle interior compared to conventional panels that bend in one stage. During a frontal collision of the vehicle, the first bending portion bends from the center section extending in the vehicle width direction as a starting point. On the other hand, in the case of a collision mode in which the colliding body intrudes rearward while tilting inward in the vehicle width direction, for example, the first bending portion bends from the outer section, whose rearward tilt angle increases as it moves outward in the vehicle width direction as a starting point. In this way, it is possible to cope with a collision mode in which the colliding body intrudes in a direction tilting inward in the vehicle width direction at the outer section.

[0008] Furthermore, in the above-mentioned hood inner panel, the first intended bending portion and the second intended bending portion may respectively have a first bead and a second bead that are concave downward, the first bead inclining rearward toward the outside in the vehicle width direction and extending to near the outer edge of the hood inner panel, and the second bead may extend toward the outside in the vehicle width direction to near the outer edge of the hood inner panel without intersecting with the first bead.

[0009] With this hood inner panel, during a frontal collision of the vehicle, the panel bends from the first bead and the second bead as well as the first convex portion and the second convex portion. By adding beads as starting points for bending of the panel, the deformation mode of the panel can be stabilized. Furthermore, since the first bead is inclined rearward toward the outside in the vehicle width direction, the outer section of the first intended bending portion can be bent even in a collision situation in which a collision body having a collision surface inclined rearward toward the outside in the vehicle width direction enters the rear of the vehicle from the front end corner.

[0010] The hood inner panel may also include a bracket for attaching a hinge to the vehicle widthwise outer end side of the rear end side of the hood inner panel, and the bracket may be positioned at a distance behind the second intended bending portion.

[0011] With this hood inner panel, in the event of a frontal collision of the vehicle, the second intended bending portion bends at a position spaced apart in the fore-and-aft direction from the hinge located at the rear end of the panel, thereby preventing bending of the panel near the hinge and effectively reducing the amount of intrusion of the panel into the passenger compartment.

[0012] The hood inner panel may have a ridgeline extending in the front-rear direction between the bracket and the second bead.

[0013] With this hood inner panel, the ridge extending in the front-rear direction suppresses deformation between the bracket and the second bead, making it possible to more reliably prevent bending of the panel near the hinge.

[0014] Furthermore, according to the present invention, there is provided a vehicle hood comprising the above-mentioned hood inner panel and a reinforcement panel provided on the underside of the hood inner panel, wherein the reinforcement panel is arranged so as to straddle the first intended bending portion in a plan view, and the reinforcement panel has a recess recessed inward in the vehicle width direction at the outer edge in the vehicle width direction of the portion straddling the first intended bending portion.

[0015] According to this vehicle hood, the reinforcement panel can improve the rigidity and strength of the inner panel. Also, the reinforcement panel has a recess that is recessed inward in the vehicle width direction at the outer edge in the vehicle width direction of a portion that straddles the first intended bending portion, so that during a frontal collision of the vehicle, the reinforcement panel deforms starting from the recess, and can bend together with the first intended bending portion of the inner panel. [Effects of the Invention]

[0016] According to the present invention, the amount of intrusion of the panel into the vehicle interior during a vehicle collision can be reduced. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an external perspective view of a vehicle showing an embodiment of the present invention; [Figure 2] FIG. 2 is an exploded perspective view of the vehicle hood. [Figure 3] FIG. [Figure 4] 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 5] BB cross-sectional view of FIG. 3. [Figure 6] 4 is a cross-sectional view taken along CC in FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0018] 1 to 6 show one embodiment of the present invention, in which FIG. 1 is an external perspective view of a vehicle showing one embodiment of the present invention, FIG. 2 is an exploded perspective view of a vehicle hood, FIG. 3 is a partial bottom view of an inner panel, FIG. 4 is a cross-sectional view taken along line AA in FIG. 3, FIG. 5 is a cross-sectional view taken along line BB in FIG. 3, and FIG. 6 is a cross-sectional view taken along line CC in FIG. 3.

[0019] As shown in Fig. 1, the vehicle 100 is provided with a vehicle hood 1 that covers the upper part of an engine compartment. The vehicle hood 1 has an outer panel 10 that forms a design surface, and recesses extending in the front-to-rear direction are formed in the outer panel 10. The recesses are formed in a pair on the left and right sides on the outer sides in the vehicle width direction, spanning the front and rear.

[0020] As shown in Fig. 2, the vehicle hood 1 is arranged such that an upper outer panel 10 and a lower inner panel 20 overlap in a plan view. A reinforcement panel 30 is provided on the front end side of the lower surface of the inner panel 20 in correspondence with a locking mechanism (not shown) provided on the front end side of the vehicle hood 1. The vehicle hood 1 is formed into a plate shape as a whole by the outer panel 10, the inner panel 20, and the reinforcement panel 30. The outer panel 10, the inner panel 20, and the reinforcement panel 30 may be made of any material, such as metal or plastic, and aluminum is used in this embodiment.

[0021] As shown in Fig. 3, a bracket 35 for attaching a hinge is provided on the outer end side in the vehicle width direction at the rear end side of the inner panel 20. In Fig. 3, this is indicated by crossed diagonal lines to distinguish it from holes and the like. The inner panel 20 includes a first intended bending portion 21 that bends in the event of a vehicle collision, and a second intended bending portion 22 that is disposed rearward of the first intended bending portion 21. In this embodiment, the second intended bending portion 22 is set approximately in the center between the front and rear of the inner panel 20, and the first intended bending portion 21 is set approximately midway between the front end of the inner panel 20 and the second intended bending portion 22.

[0022] As shown in FIG. 4, the first bent portion 21 has a first convex portion 23 that convex downward. As shown in FIG. 3, the first convex portion 23 has a central section 23a that extends in the vehicle width direction toward the center in the vehicle width direction, and an outer section 23b that extends outward in the vehicle width direction from the outer end of the central section 23a in the vehicle width direction and has an increasingly rearward inclination angle as it extends outward in the vehicle width direction. The central section 23a of the first convex portion 23 is formed by a substantially horizontal surface 40 on the front side and a rearward-rising inclined surface 41 on the rear side. The outer section 23b of the first convex portion 23 is formed by a sloping surface 41 on the inner side in the vehicle width direction that rises inward in the vehicle width direction, and a substantially horizontal surface 42 on the outer side in the vehicle width direction. Here, the inclined surface 41 is formed in a cone shape.

[0023] In this embodiment, the reinforcement panel 30 is disposed so as to straddle the first intended bending portion 21 in a plan view. The reinforcement panel 30 has recesses 31, 32 at its outer edge in the vehicle width direction, which become the starting points of deformation in the event of a vehicle collision. In this embodiment, the recesses 31, 32 are formed in two locations spaced apart in the front and rear, and the rear recess 32 is disposed in a portion of the reinforcement panel 30 straddling the first intended bending portion 21.

[0024] As shown in Fig. 4, the second bent portion 22 has a second convex portion 24 that convex downward. As shown in Fig. 3, the second convex portion 24 extends in the vehicle width direction and at least partially overlaps with the outer section 23b of the first convex portion in the vehicle width direction. The second convex portion 24 is formed by a first horizontal surface 50, a first inclined surface 51, a second horizontal surface 52, a third inclined surface 53, and a third horizontal surface 54. As shown in Fig. 4, the first horizontal surface 50, the first inclined surface 51, the second horizontal surface 52, the second inclined surface 53, and the third horizontal surface 54 are arranged in this order from the front side, and the first horizontal surface 50, the second horizontal surface 52, and the third horizontal surface 54 are formed to be approximately horizontal, the first inclined surface 51 is formed to be downward sloping toward the rear, and the second inclined surface 53 is formed to be upward sloping toward the rear.

[0025] 5, the first bend portion 21 has a first bead 60 that is concave downward, and the second bend portion 22 has a second bead 70 that is concave downward. As shown in Fig. 3, the first bead 70 extends outward in the vehicle width direction, inclining rearward, to near the outer edge of the inner panel 20. The second bead 80 extends outward in the vehicle width direction to near the outer edge of the inner panel 20 without intersecting with the first bead 70.

[0026] As shown in FIG. 3 , the bracket 35 is disposed rearward of the second bend portion 22 with a gap therebetween. In this embodiment, a first horizontal surface 80, a first inclined surface 81, a second horizontal surface 82, a second inclined surface 83, and a third horizontal surface 84 are formed between the bracket 35 and the second bead 80 in this order from the outer side in the vehicle width direction, and these surfaces form ridgelines 91, 92, 93, and 94 extending in the front-to-rear direction. Specifically, the first ridgeline 91 is formed by the substantially horizontal first horizontal surface 80 and the first inclined surface 81 that rises inward in the vehicle width direction. The second ridgeline 92 is formed by the first inclined surface 81 and the substantially horizontal second horizontal surface 82. The third ridgeline 93 is formed by the second horizontal surface 82 and the second inclined surface 83 that rises inward in the vehicle width direction. The fourth ridgeline 94 is formed by the second inclined surface 83 and the substantially horizontal third horizontal surface 84.

[0027] With the vehicle hood 1 configured as described above, in the event of a frontal collision of the vehicle, the inner panel 20 bends in two stages, starting from the front first intended bending portion 21 and the rear second intended bending portion 22, as shown in Fig. 3. This reduces the amount of intrusion of the inner panel 20 into the vehicle interior compared to a conventional inner panel 20 that bends in one stage. With the inner panel 20 of this embodiment, in the event of a frontal collision of the vehicle, the panel bends starting from the first bead 60 and the second bead 70 as well as the first convex portion 21 and the second convex portion. By adding the beads 60, 70 as bending start points of the inner panel 20, the deformation mode of the inner panel 20 can be stabilized.

[0028] Furthermore, since the first bead 60 is inclined rearward toward the outside in the vehicle width direction, even in a collision situation in which a collision body having a collision surface inclined rearward toward the outside in the vehicle width direction enters the rear of the vehicle from the front end corner, the first intended bending portion 21 can be bent at the first bead 60 and the central section 23 of the first convex portion 21.

[0029] On the other hand, for example, in the case of a collision mode in which the colliding body intrudes rearward while tilting inward in the vehicle width direction, the first intended bending portion 21 bends from the starting point of the outer section 23b, where the rearward tilt angle increases as it moves further outward in the vehicle width direction. In this way, it is possible to deal with a collision mode in which the colliding body intrudes in a direction tilting inward in the vehicle width direction in the outer section 23b.

[0030] Furthermore, according to this embodiment, in the event of a frontal collision of the vehicle, the second intended bending portion 22 bends at a position spaced in the front-to-rear direction from the hinge located on the rear end side of the inner panel 20, thereby preventing bending of the inner panel 20 near the hinge and effectively reducing the amount of intrusion of the inner panel 20 into the passenger compartment. In particular, the ridge lines 91, 92, 93, 94 extending in the front-to-rear direction suppress deformation between the bracket 35 and the second bead 80, making it possible to more reliably prevent bending of the inner panel 20 near the hinge.

[0031] In the above embodiment, the first and second bendable portions 21 and 22 have the concave beads 70 and 80 on the lower side, respectively, but the beads 70 and 80 may be omitted as needed as long as they have the convex portions 23 and 24. In addition, the installation positions of the hinge mounting bracket 35 and the locking mechanism reinforcement panel 30 on the inner panel 20 can be changed as appropriate depending on the vehicle model, etc.

[0032] Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to the embodiments described above. It should be noted that not all of the combinations of features described in the embodiments are necessarily essential to the means for solving the problems of the invention. [Explanation of symbols]

[0033] 1 Vehicle hood 20 Inner panel 21 First bend planned section 22 Second bending section 23 First convex part 23a Central section 23b Outer section 24 Second convex part 30 Reinforcement panel 32 recess 35 Bracket 60 First bead 70 Second bead 91 First Ridge 92 Second Ridge 93 Third Ridge 94 Fourth Ridge

Claims

1. a first bending portion that bends during a frontal collision of the vehicle; and a second bending portion that is disposed behind the first bending portion and bends during a frontal collision of the vehicle, the first portion to be bent and the second portion to be bent respectively have a first convex portion and a second convex portion that are convex downward, the first convex portion has a central section extending in the vehicle width direction on a central side in the vehicle width direction, and an outer section extending outward in the vehicle width direction from an outer end of the central section in the vehicle width direction, the outer section having an increasingly rearward inclination angle as it extends outward in the vehicle width direction, the second convex portion extends in the vehicle width direction and at least a portion thereof overlaps with the outer section of the first convex portion in the vehicle width direction; the first bend portion and the second bend portion have a first bead and a second bead, respectively, that are concave downward; The first bead and the second bead extend outward in the vehicle width direction to near the outer edge of the hood inner panel.

2. the first bead is inclined rearward and outward in the vehicle width direction, The hood inner panel according to claim 1 , wherein the second bead does not intersect with the first bead.

3. a bracket for attaching a hinge to an outer end side of a rear end of the hood inner panel in a vehicle width direction, The hood inner panel according to claim 1 or 2, wherein the bracket is disposed rearward of the second intended bending portion at a distance.

4. The hood inner panel according to claim 3, further comprising a ridgeline extending in the front-rear direction between the bracket and the second bead.

5. A hood inner panel, A vehicle hood including a reinforcement panel provided on a lower surface of the hood inner panel, the hood inner panel includes a first bending portion that bends during a vehicle collision and a second bending portion that is disposed rearward of the first bending portion, the first intended bending portion and the second intended bending portion of the hood inner panel respectively have a first convex portion and a second convex portion that are convex downward, the first convex portion of the hood inner panel has a central section extending in the vehicle width direction on a central side in the vehicle width direction, and an outer section extending outward in the vehicle width direction from an outer end of the central section in the vehicle width direction and having an increasingly rearward inclination angle as it extends outward in the vehicle width direction, the second convex portion of the hood inner panel extends in a vehicle width direction and at least a portion thereof overlaps with the outer section of the first convex portion in the vehicle width direction; The reinforcement panel is arranged to straddle the first intended bending portion in a plan view, The reinforcement panel has a recess recessed inward in the vehicle width direction at an outer edge in the vehicle width direction of a portion spanning the first intended bending portion.

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