JPWO2019150935A1 - Vehicle hood - Google Patents

Abstract

A grill (3) attached to the front end of the outer panel (1) in a non-contact state with the inner panel (2), and a grill (3) provided on the outer panel (1) and attached to the outer panel (1). ) Is provided with a grill support portion (4) that supports the back surface. A grill reinforcing portion (5) provided at the front end portion of the inner panel (2) separated from the grill support portion (4) in the front-rear direction of the vehicle and joined to the front end side of the grill support portion (4) is provided. The grill support portion (4) is provided with a bead (9) that protrudes toward the grill (3) or the inner panel (2) and extends in the vehicle width direction.

Description

The present invention relates to a vehicle hood comprising an outer panel and an inner panel joined to the peripheral end thereof.

Conventionally, as a structure of a vehicle hood (bonnet, engine hood), a structure in which a grill is attached to a front end portion of an outer panel is known (see Patent Document 1). The "grill" in the narrow sense is a planar member attached to the inlet of the cooling air introduced into the engine room, and is formed in a mesh shape or a louver shape, for example. On the other hand, in recent years, vehicles such as electric vehicles and hybrid vehicles that do not require the introduction of cooling air from the front of the vehicle have been developed. Therefore, all decorative panels attached near the front end of the vehicle hood are "grilled". Is called.

Japanese Unexamined Patent Publication No. 11-029070

The vehicle hood to which the grill is attached is set to have a relatively high rigidity around the grill in order to prevent the grill from being deformed when the vehicle hood is opened and closed. However, as the rigidity around the grill is increased, the head injury value (HIC, Head Injury Criteria) near the front end of the vehicle hood is likely to increase, and the pedestrian protection performance may decrease. Further, in a structure in which the grill is fixed to both the outer panel and the inner panel (see Patent Document 1), it is difficult to secure a sufficient deformation allowance for the load acting on the upper surface of the vehicle hood. Therefore, there is room for improvement from the viewpoint of improving the cushioning performance of the vehicle hood.

One of the purposes of this case is to provide a vehicle hood with improved cushioning performance of the vehicle hood, which was created in view of the above problems. Not limited to this purpose, it is also possible to exert an action / effect derived from each configuration shown in the “mode for carrying out the invention” described later, which cannot be obtained by the conventional technique. It can be positioned as a purpose.

(1) The disclosed vehicle hood is a vehicle hood including an outer panel and an inner panel joined to a peripheral end portion of the outer panel, and the outer panel is in a state of non-contact with the inner panel. The grill attached to the front end portion, the grill support portion provided on the outer panel and supporting the back surface of the grill attached to the outer panel, and the inner panel separated from the grill support portion in the vehicle front-rear direction. A grill reinforcing portion provided at the front end portion of the grill and joined to the front end side of the grill support portion, and a bead protruding toward the grill or the inner panel at the grill support portion and extending in the vehicle width direction. Be prepared.

(2) It is preferable that the grill support portion has a grid portion formed in a grid shape.
(3) It is preferable that the lattice portion has a lattice having a horizontal cross-sectional shape protruding in the direction opposite to the bead.
(4) It is preferable that the grill support portion has a staircase portion formed in a staircase shape at each end portion in the left-right direction of the vehicle.
(5) The bead has a central bead located at the center of the vehicle and an end bead located at each end in the left-right direction of the vehicle, and the end bead is arranged at a position higher than the center bead. Is preferable.

On the rear side of the vehicle of the grill, the grill support part of the outer panel and the grill reinforcement part of the inner panel are separated, and a bead is provided on the grill support part to cope with the load input near the front end portion of the vehicle hood. The outer panel can be deformed with a sufficient stroke, and the cushioning performance of the vehicle hood can be improved.

It is an exploded perspective view of the hood for a vehicle. It is a top view of the inner panel. (A) to (C) are sectional views of a vehicle hood. It is a perspective view which shows the grill support part of the outer panel. (A) to (C) are cross-sectional views of the grill support portion.

Hereinafter, the vehicle hood 10 as an embodiment will be described with reference to the drawings. The embodiments shown below are merely examples, and there is no intention of excluding the application of various modifications and techniques not specified in the following embodiments. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed, or can be combined as appropriate.

[1. Device configuration]
The vehicle hood 10 shown in FIG. 1 is a member that covers the upper surface of the engine room so as to be openable and closable, and is pivotally supported on the vehicle body by a hinge (not shown). The vehicle hood 10 is provided with an outer panel 1 and an inner panel 2 joined to an end portion around the outer panel 1. The outer panel 1 and the inner panel 2 are made of an aluminum alloy panel material. A striker of a hood lock device is fixed to the inner panel 2, and a lock device engaged with the striker is provided on the vehicle body side.

A plate-shaped grill 3 (decorative panel) is attached to the tip (front end) of the vehicle hood 10. Further, the outer panel 1 is provided with a grill support portion 4 that supports the back surface of the grill 3 attached to the outer panel 1. Correspondingly, a grill reinforcing portion 5 is provided at the front end portion of the inner panel 2 so as to be separated from the grill support portion 4 in the front-rear direction of the vehicle. The grill reinforcing portion 5 is connected to the front end side (lower end side) of the grill support portion 4 by welding, hemming, or the like. Further, the grill 3 is not in contact with the grill reinforcing portion 5 (inner panel 2).

As shown in FIGS. 1 and 2, the inner panel 2 is provided with an outer moat portion 12, an island portion 13, a striker fixing portion 14, and a grill reinforcing portion 5. The outer moat portion 12 is a portion extending along each end portion and the rear end portion of the inner panel 2 in the vehicle left-right direction, and has a downwardly convex cross-sectional shape. In the present embodiment, as shown in FIGS. 3B and 3C, the cross-sectional shape of the outer moat portion 12 is a trapezoidal shape in which the lower base is shorter than the upper base. The island portion 13 is a portion formed by raising a portion surrounded by the outer moat portion 12 upward. As shown in FIG. 3B, the cross-sectional shape of the island portion 13 is a trapezoidal shape in which the upper base is shorter than the lower base.

The striker fixing portion 14 is a flat portion to which the striker is fixed. The position of the striker fixing portion 14 is set behind the grill reinforcing portion 5 and in front of the island portion 13. As shown in FIG. 3C, the cross-sectional shape of the inner panel 2 in the vehicle front-rear direction is a stepped shape (terrace shape) in which the front of the vehicle is in the downward direction. By forming a step-like step down in the front-rear direction of the vehicle in multiple stages, the gap (deformation allowance) between the outer panel 1 and the inner panel 2 is increased, and the pedestrian protection performance is improved. Further, a predetermined gap size is secured between the striker fixing portion 14 and the outer panel 1. As a result, the gap (deformation allowance) between the outer panel 1 and the inner panel 2 at the front end of the vehicle hood 10 is increased, and the pedestrian protection performance is improved.

As shown in FIG. 2, the portions of the outer moat portion 12 located at each end of the inner panel 2 in the left-right direction of the vehicle are formed in a shape branched into two in front of the vehicle. The bottom surface of the outer moat portion 12 has a shape branched into a first bottom surface 15 connected to the striker fixing portion 14 and a second bottom surface 16 connected to the grill reinforcing portion 5. The first bottom surface 15 is extended and connected from each end of the inner panel 2 in the left-right direction of the vehicle toward the striker fixing portion 14. Similarly, the second bottom surface 16 is extended and connected from each end portion in the left-right direction of the vehicle toward the grill reinforcing portion 5. As a result, the left and right end portions of the grill reinforcing portion 5 are also reinforced by the outer moat portion 12, and the bending rigidity in the vehicle front-rear direction is improved.

As shown in FIG. 4, the grill support portion 4 of the outer panel 1 is provided with a grid portion 6 formed in a grid shape and staircase portions 8 located on both left and right sides thereof. The staircase portion 8 is a portion formed in a staircase shape at each end of the grill support portion 4 in the left-right direction of the vehicle, and contributes to the improvement of the rigidity of the grill support portion 4. Further, vertically long openings 11 (slits) are arranged side by side in the lattice portion 6 at intervals in the vehicle width direction. Here, the portion extending in the vertical direction to form the left and right side sides of the opening 11 is referred to as a grid 7. As shown in FIG. 5A, the horizontal cross-sectional shape of the grid 7 is a shape that protrudes toward the rear of the vehicle (a shape that is recessed when viewed from the front of the vehicle). The protrusion direction of the grid 7 may be set to the direction toward the front of the vehicle.

The lattice 7 is provided with beads 9 at a plurality of positions for promoting bending deformation of the lattice 7 with respect to an external force. The extending direction of each bead 9 is the vehicle width direction. The shape of the bead 9 is a shape that protrudes toward the grill 3 or the inner panel 2. Further, as shown in FIG. 5B, the vertical cross-sectional shape of the bead 9 is a shape protruding toward the front of the vehicle (a shape protruding toward the front when viewed from the front of the vehicle). The protruding direction of the bead 9 is opposite to the protruding direction of the grid 7. Therefore, when the grid 7 has a shape protruding toward the front of the vehicle, the bead 9 has a shape protruding toward the rear of the vehicle. Further, the protruding dimension of the bead 9 is preferably a dimension equal to or less than the recessed dimension of the lattice 7, and is, for example, the same dimension. In this case, the front surface of the lattice portion 6 and the front surface of the bead 9 are flush with each other (they are flush with each other and have no unevenness), and the fixed surface of the grill 3 becomes smooth.

In the present embodiment, as shown in FIG. 4, beads 9 are formed at six positions other than the center of the seven grids 7. Of these beads 9, the one located closest to the center of the vehicle is called the center bead 17, and the one located closest to the ends (both left and right ends and each end in the left-right direction of the vehicle) is called the end bead 19. Call. Further, the position sandwiched between the central bead 17 and the end bead 19 is referred to as a quasi-end bead 18. The quasi-end bead 18 is located higher than the central bead 17, and the end bead 19 is located higher than the quasi-end bead 18. That is, the plurality of beads 9 are arranged so that the position of the beads 9 gradually rises from the center of the vehicle toward each end in the left-right direction of the vehicle.

The bead 9 functions as a starting point of bending when an external force acts on the grill 3 and the grill support portion 4. Further, when the grill support portion 4 is bent and deformed, the bent line is formed along the bead 9. Therefore, by setting the arrangement of the beads 9 to a higher position toward each end in the left-right direction of the vehicle, the bending line becomes a curved shape curved downward at the center of the vehicle. As a result, the central portion of the vehicle is likely to be depressed downward, and the shock absorbing performance of the grill support portion 4 is improved.

[2. Action, effect]
(1) In the vehicle hood 10 described above, the grill support portion 4 of the outer panel 1 and the grill reinforcing portion 5 of the inner panel 2 are arranged apart from each other on the vehicle rear side of the grill 3. Further, the grill support portion 4 is formed with a bead 9 which is a bent line of bending deformation. With such a structure, the outer panel 1 can be deformed with a sufficient stroke with respect to the load input near the front end portion of the vehicle hood 10, and the cushioning performance of the vehicle hood 10 can be improved. it can.

(2) As shown in FIG. 4, by providing the grill support portion 4 with a grid-shaped grid portion 6, the outer panel 1 can be flexed and deformed while distributing the external force in the vertical direction (vehicle front-rear direction). As a result, the dispersibility of the load can be improved as compared with the case of the horizontal lattice shape, and the cushioning performance of the vehicle hood 10 can be further improved.
(3) As shown in FIG. 5B, by making the protruding direction of the grid 7 and the protruding direction of the bead 9 opposite to each other, the total protruding amount can be reduced, and the outer panel 1 can be reduced. The deformation allowance can be secured. Further, when the protruding dimension of the bead 9 is the same as the recessed dimension of the lattice 7, the bead 9 does not protrude to the mounting surface of the grill 3, so that the interference between the grill 3 and the bead 9 can be prevented. , The mounting workability of the grill 3 can be improved.

(4) As shown in FIG. 5C, by providing the stairs 8 at each end of the grill support 4 in the vehicle left-right direction, it is possible to easily secure the rigidity of the grill support 4. Further, the extension of the outer moat portion 12 (second bottom surface 16) of the inner panel 2 below the staircase portion 8 also contributes to the improvement of the bending rigidity in the vehicle front-rear direction. Further, since a triangular columnar space is secured between the grill 3 and the staircase portion 8, the impact absorption performance of the grill 3 can be improved.

(5) In the vehicle hood 10 described above, as shown in FIG. 4, a plurality of beads 9 are arranged so that the positions of the beads 9 gradually rise from the center of the vehicle toward each end in the left-right direction of the vehicle. Will be done. With such an arrangement of the beads 9, the bending line when the grill support portion 4 is bent and deformed can be curved downward at the center of the vehicle. That is, the central portion of the grill support portion 4 can be easily depressed downward when an external force is applied. Therefore, the shock absorbing performance of the grill support portion 4 can be improved.

[3. Modification example]
In the above-described embodiment, the structure in which the beads 9 are dispersedly arranged in the six lattices 7 is illustrated, but it is also possible to have a structure in which the beads 9 are connected to one. In this case, by arranging one bead 9 in an arc shape on the grill support portion 4 having no opening 11, the same operation and effect as those of the above-described embodiment can be obtained. Further, in the above-described embodiment, the outer panel 1 and the inner panel 2 are formed of an aluminum alloy panel material, but other types of panel materials may be used.

1 Outer panel 2 Inner panel 3 Grill 4 Grill support 5 Grill reinforcement 6 Lattice 7 Lattice 8 Stairs 9 Bead 10 Vehicle hood 11 Opening 12 Outer moat 13 Island 14 Striker fixing 15 First bottom surface 16 Second Bottom 17 Central bead 18 Quasi-end bead 19 End bead

Claims (5)

In a vehicle hood comprising an outer panel and an inner panel joined to a peripheral end of the outer panel.
A grill attached to the front end of the outer panel in a non-contact state with the inner panel,
A grill support portion provided on the outer panel and supporting the back surface of the grill attached to the outer panel,
A grill reinforcement portion provided at the front end portion of the inner panel separated from the grill support portion in the front-rear direction of the vehicle and joined to the front end side of the grill support portion.
A bead that protrudes toward the grill or the inner panel at the grill support portion and extends in the vehicle width direction.
A vehicle hood characterized by being equipped with. The vehicle hood according to claim 1, wherein the grill support portion has a grid portion formed in a grid shape. The vehicle hood according to claim 2, wherein the lattice portion has a lattice having a horizontal cross-sectional shape protruding in a direction opposite to that of the bead. The vehicle hood according to any one of claims 1 to 3, wherein the grill support portion has a staircase portion formed in a staircase shape at each end portion in the left-right direction of the vehicle. The bead has a central bead located at the center of the vehicle and an end bead located at each end in the left-right direction of the vehicle.
The vehicle hood according to any one of claims 1 to 4, wherein the end bead is arranged at a position higher than the central bead.

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