JP2022158336A - Automobile hood structure - Google Patents

Abstract

To secure high performances of tensile rigidity, dent resistance, and pedestrian protection performance in an automobile hood structure.SOLUTION: An automobile hood structure includes: an outer panel 4; an inner panel 20; and a support section 31. The inner panel 20 has a protrusion section 22 and an inside inclined wall 23. The protrusion section 22 is arranged to face a lower surface of the outer panel 4 and has a support surface 21 supporting the lower surface. The inside inclined wall 23 is continuously inclined to the support surface 21 from the protrusion section 22. The support section 31 is provided on a front section side in a vehicle longitudinal direction of a side section in a vehicle width direction of the inner panel 20 and supports the lower surface of the outer panel 4 from a lower side in a vehicle height direction. A trim hole 29 is provided on a front section side in the vehicle longitudinal direction of the inside inclined wall 23 arranged in the side section in the vehicle width direction.SELECTED DRAWING: Figure 3

Description

The present invention relates to a hood structure for automobiles.

Automotive hood structures are required to have high tensile rigidity when a load is applied from the hood outer surface in an elastic state, such as when washing a car, and dent resistance, which is aimed at suppressing denting when a strong local load is applied. It is In addition, from the viewpoint of safety, high pedestrian protection performance is required. Pedestrian protection performance indicates the impact absorption performance that accompanies the collapse of the hood portion during a frontal collision of the vehicle.

Patent Literature 1 discloses an automotive hood structure in which a plurality of trim holes are provided in a vertical wall of an inner panel to improve the crushability of the front portion in the longitudinal direction of the vehicle, thereby improving the pedestrian protection performance. It is

JP 2015-182738 A

However, Patent Literature 1 does not describe in detail special measures for improving tension rigidity and dent resistance, and there is room for improvement.

An object of the present invention is to ensure high performance in terms of tension rigidity, dent resistance, and pedestrian protection performance in an automotive hood structure.

The present invention comprises: an outer panel forming the upper surface of an automobile hood; a raised portion having a support surface arranged to face the lower surface of the outer panel and supporting the lower surface; an inclined inner slanted wall, a groove bottom wall continuous from the inner slanted wall facing and spaced from the lower surface of the outer panel, and a groove bottom wall continuous from the groove bottom wall against the groove bottom wall. An inner panel having an inclined outer inclined wall, and a side portion of the inner panel in the vehicle width direction provided on the front side in the vehicle front-rear direction to support the lower surface of the outer panel from below in the vehicle height direction. and a support portion, and a trim hole is provided on the front portion side in the vehicle front-rear direction of the inner inclined wall arranged on the side portion in the vehicle width direction.

According to the automotive hood structure of the present invention, the lower surface of the front portion of the outer panel in the vehicle front-rear direction is supported by the support portion from below in the vehicle height direction. Therefore, high tension rigidity and dent resistance of the outer panel can be ensured. Further, a trim hole is provided on the front portion side in the vehicle front-rear direction of the inner inclined wall arranged at the side portion in the vehicle width direction. The inner slanted wall of this portion exerts resistance against impacts from the front of the vehicle and from above, but by providing a trim hole in this portion, the automobile hood can be easily crushed against both impacts. High pedestrian protection performance can be secured. The supporting portion may be a part of the inner panel, or may be separate from the inner panel.

The automotive hood structure includes a hinge portion provided on a rear side in the vehicle front-rear direction of the side portion of the inner panel in the vehicle width direction so as to pivotally support the automotive hood so as to be openable and closable with respect to the vehicle. The trim hole may be provided only on the front portion side in the vehicle front-rear direction of the inner inclined wall disposed at the side portion in the vehicle width direction.

According to the above configuration, the trim hole is provided only at a position away from the hinge portion provided on the rear side in the vehicle front-rear direction (on the front side in the vehicle front-rear direction). In other words, no trim hole is provided in the vicinity of the hinge portion, thereby suppressing a decrease in rigidity in the vicinity of the hinge portion and ensuring high bending rigidity and torsional rigidity.

The inner inclined wall includes an inner side wall portion extending in the vehicle front-rear direction and continuously inclined with respect to the support surface from a side portion of the raised portion in the vehicle width direction. an inner front wall portion extending in the vehicle width direction and continuously inclined with respect to the support surface from the front of the direction; an inner corner wall connecting the inner side wall and the inner front wall, the trim hole being provided in the inner corner wall; may be

According to the above configuration, the trim hole can be provided at the frontmost portion in the vehicle front-rear direction of the side portion in the vehicle width direction of the inner inclined wall. Therefore, it is possible to suppress a decrease in bending rigidity and torsional rigidity.

The trim hole may be provided on the lower side in the vehicle height direction with a gap from the upper end of the inner corner wall portion in the vehicle height direction.

According to the arrangement, the trim hole terminates in the inner corner wall and does not extend to the ridge. Accordingly, a ridge line is formed at the boundary between the raised portion and the inner corner wall portion. Bending deformation and torsional deformation are likely to occur in surfaces, but are less likely to occur in ridges. Therefore, in the above configuration, bending deformation and torsional deformation are suppressed by the ridgeline, and reduction in bending rigidity and torsional rigidity can be suppressed.

The trim hole is formed by cutting and raising a portion of the inner corner wall portion toward the outer panel starting from the upper end of the trim hole in the vehicle height direction, and the support portion is formed by the cutting and raising. may include a cut-and-raised piece formed by

According to the above configuration, the formation of the trim hole and the formation of the support can be achieved simultaneously. When cutting the inner panel to the shape of the trim hole, cut the trim hole other than the upper end in the vehicle height direction, and bend the outer panel so that a fold line is formed at the upper end of the trim hole ( i.e. cut up). As a result, a cut-and-raised piece is formed to support the lower surface of the outer panel, and the cut-and-raised piece can serve as a support portion. Therefore, a separate member is not required for forming the support portion, and the support portion and the trim hole can be formed at the same time only by cutting and raising a portion of the inner corner wall portion.

The trim hole is formed by cutting and raising a portion of the inner corner wall portion toward the outer panel starting from the lower end of the trim hole in the vehicle height direction, and the support portion is formed by the cutting and raising. The cut-and-raised piece includes a leg portion extending from the lower end of the trim hole in the vehicle height direction to the lower surface of the outer panel; and a seat portion that faces the lower surface and supports the lower surface of the outer panel.

According to the above configuration, the leg supports the load applied to the outer panel in the vehicle height direction as a compressive load. Therefore, the supporting portion is less likely to deform than when the load is received as a bending load. Therefore, high tension rigidity and dent resistance can be secured.

A through hole may be provided in the leg.

According to the above configuration, the deformation resistance of the cut-and-raised piece included in the support portion in the vehicle height direction can be reduced. That is, the automobile hood is easily crushed in the vehicle height direction. Therefore, the impact absorbing performance against the impact from above that may occur when a pedestrian runs on the hood of the automobile is improved, and the pedestrian protection performance can be improved compared to the case where the leg is not provided with the through hole.

The leg may be bent.

According to the above configuration, the deformation resistance of the cut-and-raised piece included in the support portion in the vehicle height direction can be reduced. Therefore, the pedestrian protection performance can be improved as compared with the case where the legs are not bent.

According to the automotive hood structure of the present invention, it is possible to ensure high performance in terms of tension rigidity, dent resistance, and pedestrian protection performance.

The perspective view which shows the front part of a motor vehicle. 1 is a perspective view of a vehicle hood structure according to the present invention as viewed from the front of the vehicle; FIG. FIG. 3 is a perspective view of the automotive hood structure of FIG. 2 with an outer panel removed; FIG. 4 is a top plan view of the automotive hood structure of FIG. 3 ; FIG. 4 is an enlarged view of portion V of FIG. 3; 6 is an end view at line VI-VI of FIG. 5; FIG. The enlarged view similar to FIG. 5 of 2nd Embodiment. 8 is an end view at line VIII-VIII of FIG. 7; FIG. The enlarged view similar to FIG. 5 of 3rd Embodiment. FIG. 10 is an end view on line XX of FIG. 9; The enlarged view similar to FIG. 5 of the modification of 3rd Embodiment. FIG. 12 is an end view at line XII-XII of FIG. 11; The same enlarged view as FIG. 5 of 4th Embodiment. 14 is an end view at line XIV-XIV of FIG. 13; FIG. The same enlarged view as FIG. 5 of 5th Embodiment. 16 is an end view on line XVI-XVI of FIG. 15; FIG. The same enlarged view as FIG. 5 of 6th Embodiment. 18 is an end view at line XVIII--XVIII of FIG. 17; FIG.

An automotive hood structure according to one embodiment of the present invention will be described with reference to the drawings. An arrow FR appropriately shown in these drawings indicates the front of the vehicle, an arrow UP indicates the upper side in the vehicle height direction, and an arrow W indicates the right side in the vehicle width direction. Further, when the automobile hood 1 is closed, the front side of the automobile hood is in the same direction as the front side of the vehicle, the upper side of the automobile hood is in the same direction as the upper side of the vehicle, and the width direction of the automobile hood is the width direction of the vehicle. in the same direction as In the following description, the vehicle hood 1 is assumed to be closed.

(First embodiment)
FIG. 1 shows a vehicle 2 provided with an automobile hood 1 to which the automobile hood structure according to this embodiment is applied. An automobile hood 1 is arranged in the front part of the vehicle so as to cover an engine room (not shown) from above the vehicle. A vehicle hood 1 is attached to a vehicle body via a hinge portion 3, which will be described later, so that it can be opened and closed. That is, the automobile hood 1 is configured to open and close the engine compartment by rotating the hinge portion 3 around the hinge axis.

Referring to FIGS. 2 and 3 , the automotive hood structure includes an outer panel 4 forming the upper surface of the automotive hood 1 and an inner panel 20 forming the lower surface of the automotive hood 1 . The outer peripheral end portion of the outer panel 4 and the outer peripheral end portion of the inner panel 20 are joined by, for example, hemming.

As an example, the outer panel 4 and the inner panel 20 are both formed by press forming an aluminum alloy plate. Other metal plates such as steel plates may be applied to the outer panel 4 and the inner panel 20 .

Referring to FIGS. 3 and 4, the inner panel 20 has a raised portion 22 having a support surface 21 positioned opposite the lower surface of the outer panel 4 to support the lower surface of the outer panel 4 . In this embodiment, the raised portion 22 has a substantially hexagonal shape when viewed from the vehicle height direction, and is a raised portion at the central portion of the inner panel 20 . In this embodiment, the raised portion 22 includes a recessed portion 40 having a shape recessed downward in the vehicle height direction on the support surface 21 . In this embodiment, the recesses 40 extend in the vehicle width direction, and are provided at four intervals in the vehicle front-rear direction.

In this embodiment, the lower surface of the outer panel 4 and the support surface 21 of the inner panel 20 are joined by a mastic adhesive 5 (see FIG. 6). The inner panel 20 further has an inner sloped wall 23 , a groove bottom wall 24 and an outer sloped wall 25 . The inner slanted wall 23 continues from the raised portion 22 and is slanted with respect to the support surface 21 . The groove bottom wall 24 is continuous from the inner inclined wall 23 and faces the lower surface of the outer panel 4 with a space therebetween. The outer inclined wall 25 is continuous from the groove bottom wall 24 and is inclined with respect to the groove bottom wall 24 . In this embodiment, the inner inclined wall 23 , the groove bottom wall 24 and the outer inclined wall 25 form an annular groove 41 having the groove bottom wall 24 as the groove bottom. The groove 41 opens upward in the vehicle height direction and surrounds the raised portion 22 . The raised portion 22 is a top surface portion that is raised with respect to the groove 41 .

Since the vehicle hood 1 according to the present embodiment is symmetrical with respect to the axis X extending in the vehicle front-rear direction at the center in the vehicle width direction, only one side of the vehicle hood 1 in the vehicle width direction will be described below. do.

In this embodiment, the inner sloping wall 23 comprises an inner rear wall portion 23a, an inner side wall portion 23b, an inner front wall portion 23c, and an inner corner wall portion 23d. The inner rear wall portion 23a extends in the vehicle width direction continuously from the rear of the protruding portion 22 in the vehicle front-rear direction and inclined with respect to the support surface 21 . The inner side wall portion 23b continues from the side portion of the raised portion 22 in the vehicle width direction and is inclined with respect to the support surface 21, and extends in the vehicle front-rear direction. The inner front wall portion 23c extends in the vehicle width direction while continuing from the front of the raised portion 22 in the vehicle front-rear direction and being inclined with respect to the support surface 21 . For example, the inner side wall portion 23b may be configured to approach the axis X forward in the vehicle front-rear direction. That is, the inner side wall portion 23b may be inclined with respect to the axis X instead of being parallel to the axis X.

The inner corner wall portion 23d is continuous from the vehicle front-rear direction front portion side of the vehicle width direction side portion of the raised portion 22 and is inclined with respect to the support surface 21 so as to separate the inner side wall portion 23b and the inner front wall portion 23c. Connected. In this embodiment, the inner corner wall portion 23d has a planar shape. A ridge line 26 is formed between the inner corner wall portion 23 d and the raised portion 22 . A valley line 30 is formed between the inner corner wall portion 23 d and the groove bottom wall 24 .

In this embodiment, the groove bottom wall 24 has a groove bottom rear wall portion 24a, a groove bottom side wall portion 24b, and a groove bottom front wall portion 24c. The groove bottom rear wall portion 24a is continuous from the inner rear wall portion 23a and faces the lower surface of the outer panel 4 with a space therebetween. The groove bottom side wall portion 24b is continuous from the inner side wall portion 23b and part of the inner corner wall portion 23d and faces the lower surface of the outer panel 4 with a space therebetween. The groove bottom front wall portion 24c is continuous from the inner front wall portion 23c and part of the inner corner wall portion 23d and faces the lower surface of the outer panel 4 with a space therebetween.

In this embodiment, the outer sloped wall 25 has an outer rear wall portion 25a, an outer side wall portion 25b, and an outer front wall portion 25c. The outer rear wall portion 25a continues from the groove bottom rear wall portion 24a and is inclined with respect to the groove bottom rear wall portion 24a. The outer side wall portion 25b continues from the groove bottom side wall portion 24b and is inclined with respect to the groove bottom side wall portion 24b. The outer front wall portion 25c continues from the groove bottom front wall portion 24c and is inclined with respect to the groove bottom front wall portion 24c.

In this embodiment, as indicated by the dotted line in FIG. 4, the inner panel 20 is provided at the vehicle width direction center of the groove bottom front wall portion 24c, that is, on the axis X of the groove bottom front wall portion 24c. A locking member 27 is provided. The locking member 27 has a function of fixing the automobile hood 1 to the vehicle body in a closed state. Also, in this embodiment, the inner panel 20 includes a dentry reinforcement 28 . The dent reinforcement 28 has a function of improving the tensional rigidity of the front portion of the automobile hood 1 . The dent reinforcement 28 is provided so as to cover the lock member 27 and the groove bottom front wall portion 24c from above in the vehicle height direction.

Referring to FIGS. 3 and 4, the automotive hood structure comprises a hinge portion 3. As shown in FIG. The hinge portion 3 is provided on the rear side in the vehicle front-rear direction of the side portion of the inner panel 20 in the vehicle width direction so as to pivotally support the vehicle hood 1 to be openable and closable with respect to the vehicle 2 . That is, the hinge portion 3 is joined to the side portion of the groove bottom rear wall portion 24a on the lower surface of the inner panel 20, in other words, the portion where the groove bottom rear wall portion 24a and the groove bottom side wall portion 24b join.

5 and 6, the inner panel 20 is provided with a trim hole 29 which is a through hole. The trim hole 29 is formed by cutting and raising a portion of the inner corner wall portion 23d toward the outer panel 4 starting from the upper end of the trim hole 29 in the vehicle height direction. Specifically, the trim hole 29 is provided only on the vehicle front-rear direction front portion side of the inner inclined wall 23 disposed on the vehicle width direction side portion (in this embodiment, only on the inner corner wall portion 23d). Here, the front side in the vehicle front-rear direction is the front side when the inner panel 20 is divided into two in the vehicle front-rear direction. In this embodiment, the trim holes 29 are rectangular. However, the trim hole 29 may be polygonal or any other shape other than rectangular. Further, the position of the trim hole is not limited to the position of this embodiment, and may be provided at other locations.

The trim hole 29 is provided on the lower side in the vehicle height direction with a gap a from the upper end (ridge line 26) of the inner corner wall portion 23d in the vehicle height direction. That is, the trim hole 29 is provided so as to leave the ridge line 26 . The gap a may be about 10% or more of the length b from the upper end (ridgeline 26) to the lower end (valley line 30) of the inner corner wall portion 23d (a≧0.1b).

Further, the trim hole 29 is provided on the upper side in the vehicle height direction with a gap c from the vehicle height direction lower end (valley line 30) of the inner corner wall portion 23d. That is, the trim hole 29 is provided so as to leave the valley line 30. As shown in FIG. The gap c may be about 10% or more of the length b from the ridgeline 26 to the valley line 30 (c≧0.1b).

The automotive hood structure comprises a support 31 . In this embodiment, the support portion 31 is a part of the inner panel 20 and includes a cut-and-raised piece 35A formed by cutting and raising. That is, the cut-and-raised piece 35A supports the lower surface of the outer panel 4 from below in the vehicle height direction. Further, in this embodiment, the cut-and-raised piece 35A is joined to the outer panel 4 with the mastic adhesive 5. As shown in FIG.

Reference is made below to tensile stiffness, dent resistance, bending stiffness, and torsional stiffness.

The tensile rigidity is an index indicating the rigidity when a load is applied from the outer surface of the hood while the hood 1 is in an elastic state. be done. The smaller the deformation amount, the higher the tensile rigidity, which is evaluated as good. The dent resistance is evaluated in substantially the same manner as for the tension stiffness, although the applied load is slightly higher. Therefore, by providing the support portion 31 that supports the lower surface of the outer panel 4 from below in the vehicle height direction, tension rigidity and dent resistance can be improved.

The flexural rigidity is an index indicating the bending resistance of the vehicle hood 1. For example, the front corners of the vehicle hood 1 (portion A shown in FIG. 4) are measured with the two hinge portions 3 and the lock member 27 as supporting points. It is obtained by measuring the amount of deformation when a load is applied from the bottom to the top in the vehicle height direction. The smaller the deformation amount, the higher the flexural rigidity, which is evaluated as good. Therefore, by suppressing a decrease in rigidity in the vicinity of the two hinge portions 3 and the lock member 27, it is possible to suppress a decrease in bending rigidity.

The torsional rigidity is an index indicating the resistance to torsion of the automobile hood 1. For example, with three corners of the automobile hood 1 including the two hinges 3 as supporting points, the remaining one corner (see FIG. 4 It is obtained by measuring the amount of deformation when a load is applied to the indicated portion A) from above to below in the vehicle height direction. The smaller the deformation amount, the higher the torsional rigidity, which is evaluated as good. Therefore, by suppressing a decrease in rigidity in the vicinity of the hinge portion 3, it is possible to suppress a decrease in torsional rigidity.

According to the automotive hood structure of this embodiment, the lower surface of the front portion of the outer panel 4 in the vehicle front-rear direction is supported by the support portion 31 from below in the vehicle height direction. Therefore, the tension rigidity and dent resistance of the outer panel 4 can be improved.

Further, in the present embodiment, the trim hole 29 is provided only at a position away from the hinge portion 3 provided on the rear side in the vehicle front-rear direction (inside corner wall portion 23d on the front side in the vehicle front-rear direction). . In other words, the trim hole 29 is not provided in the vicinity of the hinge portion 3, thereby suppressing a decrease in rigidity in the vicinity of the hinge portion 3 and ensuring high bending rigidity and torsional rigidity.

Further, in the present embodiment, a trim hole 29 is provided in an inner corner wall portion 23d on the front side in the vehicle front-rear direction of the inner inclined wall 23 arranged at the side portion in the vehicle width direction. The inner corner wall portion 23d exerts resistance against impacts from the front of the vehicle 2 and impacts from above. can be easily crushed, and high pedestrian protection performance can be secured.

Further, in the present embodiment, the trim hole 29 is provided in the vehicle width direction side portion of the inner inclined wall 23 at the frontmost portion in the vehicle front-rear direction (that is, the inner corner wall portion 23d). Further, the trim hole 29 is provided in an inner corner wall portion 23d of the inner inclined wall 23, which is located far away from the lock member 27 in the vehicle width direction. That is, the trim hole 29 is not provided near the hinge portion 3 and near the lock member 27 . Therefore, it is possible to suppress a decrease in bending rigidity and torsional rigidity.

Further, in this embodiment, the trim hole 29 terminates within the inner corner wall portion 23d and does not extend to the raised portion 22, and a ridge line 26 is formed at the boundary between the raised portion 22 and the inner corner wall portion 23d. ing. Bending deformation and torsional deformation are likely to occur in surfaces, but are less likely to occur in ridges. Therefore, the formation of the ridgeline 26 suppresses bending deformation and torsional deformation, thereby suppressing a decrease in bending rigidity and torsional rigidity.

Also, in this embodiment, the formation of the trim hole 29 and the formation of the support portion 31 can be achieved at the same time. When the inner panel 20 is cut into the shape of the trim hole 29 , the trim hole 29 is cut at a portion other than the upper end in the vehicle height direction, and the upper end of the trim hole 29 is directed toward the outer panel 4 so that a folding line 36 is formed at the upper end of the trim hole 29 . bending (that is, cutting and raising). As a result, a cut-and-raised piece 35A that supports the lower surface of the outer panel 4 is formed, and the cut-and-raised piece 35A can serve as the support portion 31 . Therefore, a separate member is not required for forming the support portion 31, and the support portion 31 and the trim hole 29 can be formed at the same time by only cutting and raising a portion of the inner corner wall portion 23d.

As described above, according to the automotive hood structure of the present embodiment, it is possible to ensure high performance in terms of tension rigidity, dent resistance, bending rigidity, torsional rigidity, and pedestrian protection performance.

(Second embodiment)
Referring to FIGS. 7 and 8, the configuration of the automotive hood structure according to the second embodiment of the present invention differs from that of the first embodiment in the following points. The rest of the configuration of the second embodiment is the same as that of the first embodiment, and the same reference numerals are given to the same or similar elements as those of the first embodiment.

In the automotive hood structure according to the second embodiment, the trim hole 29 is formed by cutting and raising a portion of the inner corner wall portion 23d toward the outer panel 4 starting from the lower end of the trim hole 29 in the vehicle height direction. ing.

The support portion 31 also includes a cut-and-raised piece 35B formed by cutting and raising. That is, the cut-and-raised piece 35B supports the lower surface of the outer panel 4 from below in the vehicle height direction. The cut-and-raised piece 35B has a leg portion 37 and a seat portion 38 . In the second embodiment, the leg portion 37 extends perpendicularly to the groove bottom wall 24 from the lower end of the trim hole 29 in the vehicle height direction to the lower surface of the outer panel 4 . The seat portion 38 extends from the tip of the leg portion 37 and supports the lower surface of the outer panel 4 while facing the lower surface of the outer panel 4 . In the second embodiment, the seat 38 is joined to the outer panel 4 by mastic adhesive 5 . Also, in the second embodiment, the seat portion 38 extends from the leg portion 37 toward the raised portion 22 .

According to the automobile hood structure according to the second embodiment, the leg portion 37 supports the load applied to the outer panel 4 as a compressive load. Therefore, the support portion 31 is less likely to deform than when the load is received as a bending load. Therefore, it is easy to ensure high tension rigidity and dent resistance.

As shown in FIGS. 9 and 10, in a variant of the second embodiment, the seat 38 extends from the leg 37 in the opposite direction to the ridge 22, i.e. towards the outer sloped wall 25. As shown in FIGS.

By extending the seat portion 38 toward the outer inclined wall 25, it is possible to support the outer panel 4 even in a region far from the protruding portion 22, thereby improving tension rigidity and dent resistance in a wide range.

(Third embodiment)
Referring to FIGS. 11 and 12, the configuration of the automotive hood structure according to the third embodiment of the present invention differs from that of the second embodiment in the following points. Other configurations of the third embodiment are the same as those of the second embodiment, and the same or similar elements as those of the second embodiment are denoted by the same reference numerals.

In the automobile hood structure according to the third embodiment, through holes 39 are provided in the leg portions 37 . In the third embodiment, the through hole 39 is provided in the central portion of the leg portion 37 . The through hole 39 is formed, for example, in a substantially rectangular shape. The seat 38 may extend toward the raised portion 22 in the opposite direction as shown.

According to the automotive hood structure according to the third embodiment, the deformation resistance of the cut-and-raised piece 35C included in the support portion 31 in the vehicle height direction can be reduced. That is, the vehicle hood 1 is easily crushed in the vehicle height direction. Therefore, the impact absorption performance against the impact from above that may occur when a pedestrian runs on the automobile hood 1 is improved, and the pedestrian protection performance is improved compared to the case where the leg portion 37 is not provided with the through holes 39. can improve.

(Fourth embodiment)
Referring to FIGS. 13 and 14, the configuration of the automotive hood structure according to the fourth embodiment of the present invention differs from that of the second embodiment in the following points. Other configurations of the fourth embodiment are the same as those of the second embodiment, and the same reference numerals are given to the same or similar elements as those of the second embodiment.

In the automobile hood structure according to the fourth embodiment, the leg portion 37 is provided at an angle θ1 with respect to the groove bottom wall 24 . The angle θ1 is larger than the angle θ2 of the inner corner wall portion 23d with respect to the groove bottom wall 24 and smaller than 90° (θ2<θ1<90°).

When the automotive hood structure according to the fourth embodiment is manufactured using a mold, the angle θ3 between the leg portion 37 and the seat portion 38 must be 90° or more (θ3≧90°). That is, the angle θ1 must be larger than the angle θ2 and smaller than 90°, and the angle θ3 must be set to 90° or more.

According to the automobile hood structure according to the fourth embodiment, the impact applied to the cut-and-raised piece 35D deforms the leg 37 so as to fall down. deformation resistance in the vehicle height direction can be reduced. Therefore, the impact absorbing performance against the impact from above that may occur when a pedestrian runs on the automobile hood 1 can be improved, and the pedestrian protection performance can be improved.

(Fifth embodiment)
15 and 16, the configuration of the vehicle hood structure according to the fifth embodiment of the present invention differs from that of the second embodiment in the following points. The rest of the configuration of the fifth embodiment is the same as that of the second embodiment, and the same reference numerals are given to the same or similar elements as those of the second embodiment.

In the vehicle hood structure according to the fifth embodiment, the leg portion 37 is bent. The bent leg portion 37 may have a convex shape toward the raised portion 22 as in the illustrated example, or may have a convex shape in a direction away from the raised portion 22 contrary to the illustration. When the hood structure for a vehicle according to the fifth embodiment is manufactured using a mold and the leg portion 37 is convex in the direction away from the raised portion 22, the seat portion 38 faces the raised portion 22 opposite to the illustration. must be extended.

According to the vehicle hood structure according to the fifth embodiment, the deformation resistance of the cut-and-raised piece 35E included in the support portion 31 in the vehicle height direction can be reduced. Therefore, the pedestrian protection performance can be improved as compared with the case where the leg portion 37 is not bent.

(Sixth embodiment)
Referring to FIGS. 17 and 18, the configuration of the automotive hood structure according to the sixth embodiment of the present invention differs from that of the first embodiment in the following points. The rest of the configuration of the sixth embodiment is the same as that of the first embodiment, and the same or similar elements as those of the first embodiment are given the same reference numerals.

In the automotive hood structure according to the sixth embodiment, the trim hole 29 is provided by cutting out the inner corner wall portion 23d. Further, the support portion 31 is a separate part (separate body) from the inner panel 20 . The support portion 31 is provided on the front side in the vehicle front-rear direction of the side portion of the inner panel 20 in the vehicle width direction, and supports the lower surface of the outer panel 4 from below in the vehicle height direction. The support portion 31 is provided at a portion where the groove bottom side wall portion 24b and the groove bottom front wall portion 24c meet.

In the sixth embodiment, the support portion 31 includes a bottom surface portion 32, a top surface portion 33, and a pillar portion . The bottom surface portion 32 constitutes the bottom surface of the support portion 31 and is a portion that is firmly joined to the inner panel 20 by spot welding, FSW joining, TOX joining, or the like. The top surface portion 33 constitutes the top surface of the support portion 31 and is a portion that is joined to the outer panel 4 with the mastic adhesive 5 . The column portion 34 is a portion that connects the bottom surface portion 32 and the top surface portion 33 . In the sixth embodiment, the column portion 34 is bent near the center in the vehicle height direction.

According to the automotive hood structure according to the sixth embodiment, the trim hole 29 and the support portion 31 can be designed separately. Therefore, providing the large trim hole 29 makes it possible to easily crush the automobile hood 1 and to provide the support portion 31 having a strength sufficient to secure the tension rigidity of the automobile hood 1 . Therefore, the deformation resistance of the vehicle hood 1 in the vehicle height direction is reduced, and the pedestrian protection performance can be improved. In addition, since the column portion 34 is bent near the center in the vehicle height direction, it is easily crushed by an impact from above, and high pedestrian protection performance can be ensured.

REFERENCE SIGNS LIST 1 automotive hood 2 vehicle 3 hinge portion 4 outer panel 5 mastic adhesive 20 inner panel 21 support surface 22 raised portion 23 inner inclined wall 23a inner rear wall portion 23b inner side wall portion 23c inner front wall portion 23d inner corner wall portion 24 groove bottom Wall 24a Groove bottom rear wall portion 24b Groove bottom side wall portion 24c Groove bottom front wall portion 25 Outer inclined wall 25a Outer rear wall portion 25b Outer side wall portion 25c Outer front wall portion 26 Ridge line 27 Lock member 28 Dent reinforcement 29 Trim hole 30 Valley line 31 support portion 32 bottom portion 33 top portion 34 column portion 35A to E cut-and-raised piece 36 folding line 37 leg portion 38 seat portion 39 through-hole 40 concave portion 41 groove

Claims (8)

an outer panel forming the upper surface of the automotive hood;
a protuberant portion having a supporting surface arranged to face the lower surface of the outer panel and supporting the lower surface; an inner inclined wall continuing from the protruding portion and inclined with respect to the supporting surface; and continuing from the inner inclined wall. an inner panel having a groove bottom wall facing the lower surface of the outer panel with a gap therebetween, and an outer inclined wall continuing from the groove bottom wall and inclined with respect to the groove bottom wall;
a support portion provided on a vehicle front-rear direction front portion side of a vehicle width direction side portion of the inner panel and supporting the lower surface of the outer panel from below in the vehicle height direction;
A hood structure for an automobile, wherein a trim hole is provided on a front portion side in the vehicle front-rear direction of the inner inclined wall disposed on the side portion in the vehicle width direction. a hinge portion provided on a rear side in the vehicle front-rear direction of the side portion of the inner panel in the vehicle width direction so as to pivotally support the automobile hood so as to be openable and closable with respect to the vehicle;
The vehicle hood structure according to claim 1, wherein the trim hole is provided only on a front portion side in the vehicle front-rear direction of the inner inclined wall disposed on the side portion in the vehicle width direction. The inner sloped wall is
an inner side wall portion extending in the vehicle front-rear direction continuously from a side portion of the raised portion in the vehicle width direction and inclined with respect to the support surface;
an inner front wall portion extending in the vehicle width direction and continuously inclined with respect to the support surface from the front of the raised portion in the vehicle front-rear direction;
An inner side continuously inclined with respect to the support surface from the vehicle front-rear direction front portion side of the vehicle width direction side portion of the raised portion and connecting the inner side wall portion and the inner front wall portion. with a corner wall and
The automotive hood structure according to claim 1 or 2, wherein said trim hole is provided in said inner corner wall portion. The vehicle hood structure according to claim 3, wherein the trim hole is provided on the lower side in the vehicle height direction with a gap from the upper end of the inner corner wall portion in the vehicle height direction. The trim hole is formed by cutting and raising a portion of the inner corner wall toward the outer panel starting from the upper end of the trim hole in the vehicle height direction,
The automotive hood structure according to claim 3 or 4, wherein the support portion includes a cut-and-raised piece formed by the cut-and-raise. The trim hole is formed by cutting and raising a portion of the inner corner wall toward the outer panel starting from the lower end of the trim hole in the vehicle height direction,
The support portion includes a cut-and-raised piece formed by the cut-and-raise,
The cut-and-raised piece includes leg portions extending from the lower end of the trim hole in the vehicle height direction to the lower surface of the outer panel, and extending from the tips of the leg portions and facing the lower surface of the outer panel. 5. A vehicle hood structure according to claim 3 or 4, comprising a seat supporting the lower surface. The vehicle hood structure according to claim 6, wherein the leg portion is provided with a through hole. The automotive hood structure according to claim 6, wherein said legs are bent.

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