WO2019150934A1

WO2019150934A1 - Vehicle hood

Info

Publication number: WO2019150934A1
Application number: PCT/JP2019/000900
Authority: WO
Inventors: 正直堀内; 慎吾川野; 晋吾島田
Original assignee: 三菱自動車工業株式会社
Priority date: 2018-01-30
Filing date: 2019-01-15
Publication date: 2019-08-08
Also published as: JPWO2019150934A1; JP6947230B2

Abstract

Provided is a vehicle hood including: outer ditch sections (3) that extend along respective vehicle-width-direction ends and a rear end of an inner panel (2) and that each have a shape protruding away from an outer panel (1); and a striker fixing part (5) that is provided continuously from bottom surfaces of the outer ditch sections (3) and to which a striker of a hood locking device is fixed. The vehicle hood further includes: openings (6) that are bored in the inner panel (2) at positions closer to the rear of the vehicle than the striker fixing part (5) is; annular sections (7) that are provided along the peripheries of the openings (6) in an annular manner and that are bonded with respect to a lower surface of the outer panel (1); and island sections (8) that each have a shape protruding toward the outer panel (1), with the annular sections (7) serving as top surfaces. The vehicle hood further includes: a first terrace section (11) that surrounds the entire circumferences of the island sections (8) and that forms a terrace-like first terrace surface between the island sections (8) and the outer ditch sections (3); and island-section slits (9) that have shapes obtained by cutting out regions between the annular sections (7) and the first terrace surface (11) in a slit-like manner and that are disposed radially with respect to each of the openings (6).

Description

Vehicle hood

The present invention relates to a vehicle hood including an outer panel and an inner panel joined to an outer end portion thereof.

2. Description of the Related Art Conventionally, a hood structure that improves pedestrian protection performance while ensuring rigidity by making an inner panel of a vehicle hood (bonnet, engine hood) rise like a ridge is known. . That is, a raised portion extending in the vehicle width direction is formed on the inner panel, and the top surface of the raised portion is bonded and fixed to the outer panel with mastic resin or the like. By providing the raised portion, the absorption performance of the impact energy input to the vehicle hood can be improved (see Patent Document 1).

JP2016-060398A

However, the structure of the vehicle hood as described above has a problem that it is difficult to improve the bending rigidity in the vehicle longitudinal direction. For example, in a vehicle hood in which a grill or a decorative panel is fixed to the front end portion, the vehicle longitudinal dimension tends to be large, and the bending rigidity tends to be insufficient. In addition, when an aluminum alloy panel material is used for weight reduction, bending rigidity tends to be insufficient as compared with the case where a steel plate is used. On the other hand, if the panel thickness is increased in order to increase the bending rigidity, the impact energy absorption performance can be reduced. Thus, the vehicle hood has room for improvement from the viewpoint of improving impact energy absorption performance while ensuring bending rigidity.

One of the purposes of the present case was created in view of the above-described problems, and is to provide a vehicle hood that has improved impact energy absorption performance while ensuring bending rigidity. It should be noted that the present invention is not limited to this purpose, and is an operational effect that is derived from each configuration shown in “Mode for Carrying Out the Invention” to be described later. Can be positioned as a purpose.

(1) The disclosed vehicle hood relates to a vehicle hood including an outer panel, an inner panel joined to an end portion around the outer panel, and a hood lock device. The vehicular hood extends along each end and rear end of the inner panel in the vehicle left-right direction, and has an outer moat having a shape protruding from the outer panel and a bottom surface of the outer moat. A striker fixing portion that is provided continuously and to which a striker of the hood lock device is fixed. An opening provided in the inner panel at the rear of the vehicle with respect to the striker fixing portion; an annular portion provided annularly along the periphery of the opening; and bonded to the lower surface of the outer panel; And an island portion having a shape that is convex toward the outer panel, with the annular portion as a top surface. Further, a first terrace portion that forms a terrace-shaped first terrace surface between the outer moat and surrounding the entire circumference of the island portion, and a slit between the annular portion and the first terrace surface is cut out. And island slits arranged radially with respect to the opening.

(2) It is preferable that a large number of the island slits are arranged on the vehicle front side rather than the vehicle rear side of the opening.
(3) It is preferable to provide the 2nd terrace part which forms a terrace-shaped 2nd terrace surface between the said striker fixing | fixed part and said 1st terrace surface.
(4) It is preferable to have a terrace slit having a shape obtained by cutting out the space between the first terrace surface and the second terrace surface in a slit shape and extending along the inclination direction of the terrace cliff.
(5) It is preferable that the second terrace portion is disposed in front of the vehicle with respect to the first terrace portion, and the terrace slit extends in the vehicle front-rear direction.

(6) A grill attached to the front end of the vehicle hood, a grill support portion supporting the back surface of the grill attached at the front end portion of the outer panel, and a terraced grill at a position lower than the striker fixing portion It is preferable that a terrace surface is formed and a grill reinforcing portion connected to a front end side of the grill support portion at a front end portion of the inner panel. In addition, the outer moat portion is provided on the grill terrace surface, which is provided by branching from the first bottom surface extending from each end portion of the inner panel in the vehicle left-right direction toward the striker fixing portion and the first bottom surface. It is preferable to have the 2nd bottom face extended toward.

∙ The structure of the island and the first terrace surrounded by the outer moat can be softened while ensuring the bending rigidity of the entire hood for the vehicle at the outer moat. Moreover, the impact energy absorption performance can be improved by extending the island slits radially with respect to the opening of the island.

It is a disassembled perspective view of the hood for vehicles. It is a perspective view of an inner panel. It is a typical top view of an inner panel. (A)-(D) are sectional views of a vehicle hood.

Hereinafter, a vehicle hood 10 as an embodiment will be described with reference to the drawings. The embodiment described below is merely an example, and there is no intention of excluding various modifications and technical applications that are not explicitly described in the following embodiment. Each configuration of the present embodiment can be implemented with various modifications without departing from the spirit thereof. Further, they can be selected as necessary, or can be appropriately combined.

[1. Device configuration]
A vehicle hood 10 shown in FIG. 1 is a member that covers an upper surface of an engine room so as to be freely opened and closed, and is pivotally supported by a hinge (not shown) with respect to a vehicle body. The vehicle hood 10 is provided with an outer panel 1, an inner panel 2 joined to the outer end portion thereof, and a striker 4 of a hood lock device. The outer panel 1 and the inner panel 2 are formed of an aluminum alloy panel material. The hood lock device is a locking device for maintaining the closed state of the vehicle hood 10. On the vehicle body side, a lock device (not shown) that engages with the striker 4 fixed to the vehicle hood 10 is provided.

A plate-like grill 14 (decorative panel) is attached to the front end (front end, front end) of the vehicle hood 10. Moreover, the front end part of the outer panel 1 is provided with a grill support part 15 that supports the back surface of the grill 14 attached to the front end part. Corresponding to this, a grill reinforcing portion 16 is provided at the front end portion of the inner panel 2. The grill reinforcement portion 16 is connected to the front end side (lower end side) of the grill support portion 15 by welding, hemming, or the like.

As shown in FIG. 2, the inner panel 2 includes an outer moat part 3, a striker fixing part 5, an opening part 6, an annular part 7, an island part 8, a first terrace part 11, a second terrace part 12, and a grill reinforcement part 16. Is provided. The outer moat 3 is a portion extending along each end and rear end of the inner panel 2 in the left-right direction of the vehicle, and has a cross-sectional shape protruding downward (a shape protruding in a direction away from the outer panel 1). And a convex shape away from the outer panel 1. In the present embodiment, as shown in FIGS. 4B and 4C, the cross-sectional shape of the outer moat 3 is a trapezoidal shape having a lower bottom shorter than the upper bottom.

The striker fixing part 5 is a planar part to which the striker 4 is fixed. The position of the striker fixing portion 5 is set behind the vehicle with respect to the grill reinforcing portion 16. The grill reinforcing portion 16 is formed with a terrace-shaped grill terrace surface 23 at a position lower than the striker fixing portion 5. By providing a stepped step formed by the striker fixing portion 5 and the grill terrace surface 23, the gap (deformation allowance) between the outer panel 1 and the inner panel 2 at the front end portion of the vehicle hood 10 is increased. Protection performance is improved.

The outer moat 3 positioned at each end of the inner panel 2 in the left-right direction of the vehicle is formed in a shape bifurcated in front of the vehicle as shown in FIG. The bottom surface of the outer moat portion 3 has a shape branched into a first bottom surface 24 connected to the striker fixing portion 5 and a second bottom surface 25 connected to the grill terrace surface 23 of the grill reinforcing portion 16. The first bottom surface 24 extends from each end of the inner panel 2 in the left-right direction of the vehicle toward the striker fixing portion 5, and is connected to the striker fixing portion 5. Similarly, the second bottom surface 25 extends from each end of the vehicle in the left-right direction toward the grill terrace surface 23 and is continuous with the grill terrace surface 23. Thereby, each edge part of the vehicle left-right direction of the grill reinforcement part 16 is also reinforced by the outer moat part 3, and the bending rigidity of a vehicle front-back direction improves.

Three openings 6 are provided on the vehicle rear side of the striker fixing portion 5 of the inner panel 2. The arrangement direction of these openings 6 is the vehicle width direction. Around each opening 6, an annular portion 7 is formed that is bonded to the lower surface of the outer panel 1 with mastic resin or the like. The annular portion 7 is provided in an annular shape along the periphery of the opening 6. Further, the inner panel 2 has an annular section 7 as a top surface and a convex cross-sectional shape (a shape protruding toward the outer panel 1 and a shape protruding toward the outer panel 1). Three islands 8 are provided. As shown in FIG. 4D, the cross-sectional shape of the island portion 8 is a trapezoidal shape having an upper base shorter than the lower base.

The first terrace 11 and the second terrace 12 are provided around the three islands 8. The first terrace portion 11 is a portion that forms a terrace-shaped first terrace surface 21 with respect to the bottom surface of the outer moat portion 3, and the second terrace portion 12 is between the striker fixing portion 5 and the first terrace surface 21. It is a site | part which forms the terrace-shaped 2nd terrace surface 22. As shown in FIG. 2, the three island portions 8 have a shape protruding upward from one first terrace surface 21. In addition, a downward step is formed in front of the first terrace surface 21, and the second terrace surface 22 is arranged. As shown in FIG. 4 (C), the inner panel 2 is easily deformed by forming the stepped steps in the vehicle front-rear direction in multiple stages, and the protection performance of pedestrians is improved.

Further, island slits 9 arranged radially with respect to the opening 6 are provided around the island 8. As shown in FIG. 2, the island slit 9 is a portion having a shape obtained by cutting a portion from the annular portion 7 to the first terrace surface 21 into a slit shape (vertically long rectangular shape). The extending direction of the island slit 9 is the same direction as the inclination direction (the direction in which the downward inclination angle is maximized) on the inclined surface between the annular portion 7 and the first terrace surface 21. By arranging the island slit 9 in this manner, the island 8 is easily deformed with respect to the load in the vertical direction, and the protection performance of the pedestrian is improved.

The layout of the island slits 9 with respect to the opening 6 is a biased arrangement toward the front of the vehicle. For example, the number of island slits 9 arranged in front of the opening 6 is set behind the opening 6 like the islands 8 located at the left and right ends of the three islands 8 shown in FIG. More than the number of island slits 9 to be arranged. By such an arrangement of the island slits 9, the deformation amount on the front side of the island portion 8 is likely to increase more than the deformation amount on the rear side. Therefore, it becomes a structure which is easy to deform | transform with respect to the load input from the vehicle front with respect to the upper surface of the vehicle hood 10, and the protection performance with respect to the pedestrian ahead of a vehicle improves.

Similarly, a terrace slit 13 is also formed between the first terrace portion 11 and the second terrace portion 12. The terrace slit 13 is a portion having a shape in which a portion from the first terrace surface 21 to the second terrace surface 22 is cut into a slit shape. The extending direction of the terrace slit 13 is the same direction as the inclined direction in the inclined surface between the first terrace surface 21 and the second terrace surface 22. Since the second terrace portion 12 is disposed in front of the vehicle relative to the first terrace portion 11, the extending direction of the terrace slit 13 is generally the vehicle longitudinal direction. Further, the terrace slit 13 has a layout that is biased toward the front of the vehicle relative to the first terrace portion 11. Thereby, it becomes a structure which is easy to deform | transform with respect to the load input from the vehicle front with respect to the upper surface of the vehicle hood 10, and the protection performance with respect to the pedestrian ahead of a vehicle improves.

[2. Action, effect]
As shown in FIG. 4A, the vehicle hood 10 has an attitude in which the inner panel 2 is inclined so that the height difference in the vehicle front-rear direction of the inner panel 2 is larger than a predetermined dimension (for example, 100 mm). It arrange | positions and the clearance gap between the outer panels 1 is ensured. In addition, each end portion and rear end portion of the inner panel 2 in the left-right direction of the vehicle are surrounded by an outer moat portion 3 having a convex shape away from the outer panel 1. As shown in FIG. 4B, the closed cross-sectional space sandwiched between the outer moat 3 and the outer panel 1 functions as a skeleton structure for ensuring rigidity in the vicinity of the outer end of the vehicle hood 10. To do. As shown in FIGS. 2 and 3, the outer moat portion 3 extends toward the grill terrace surface 23 of the grill reinforcing portion 16 and reaches the front end of the inner panel 2. Therefore, three-dimensional rigidity is ensured in the entire region including the front end of the vehicle hood 10.

As shown in FIG. 4 (C), the inner panel 2 has a cross-sectional structure having a downward staircase shape toward the front of the vehicle. Such a stepped structure of the inner panel 2 is effective in securing the amount of deformation of the vehicle hood 10 in that the contact surface with the outer panel 1 is reduced when an external force is applied. Moreover, since the height difference in the vehicle front-rear direction of the inner panel 2 is larger than a predetermined dimension, it is easy to set a large number of steps.

As shown in FIG. 4D, the inner panel 2 has a structure in which a plurality of island portions 8 are surrounded by one first terrace portion 11. In other words, it has a structure in which a plurality of island portions 8 are bulged from one first terrace surface 21. Thereby, for example, when a load is applied to one island portion 8, the deformation of the island portion 8 is transmitted to the adjacent island portion 8, and the entire inner panel 2 is easily displaced. That is, the individual island portions 8 are not displaced in an independent state, but are easily deformed in the entire area of the inner panel 2 by interlocking the mutual displacements, thereby improving the protection performance for pedestrians.

As shown in FIG. 2, the island slits 9 are arranged radially with respect to the opening 6. Thereby, the rigidity of the island part 8 with respect to the load of an up-down direction falls, and the reaction force with respect to the load input into the upper surface of the inner panel 2 reduces. Further, the layout of the island slits 9 is biased toward the front of the vehicle. Thereby, the deformation amount on the front side of the island portion 8 is likely to increase more than the deformation amount on the rear side. The same applies to the terrace slit 13, and the amount of deformation on the front side of the first terrace portion 11 is greater than the amount of deformation on the rear side because it is arranged closer to the front of the vehicle than the first terrace portion 11. It becomes easy. That is, a structure that easily deforms with respect to a load input from the front of the vehicle with respect to the upper surface of the vehicle hood 10 is easily realized.

(1) An outer moat 3 is formed at each end and rear end of the inner panel 2 in the left-right direction of the vehicle, and the entire circumference of the island 8 where the opening 6 and the annular portion 7 are formed is the first terrace 11 By surrounding, the structure of the center part surrounded by the outer moat part 3 can be made soft, ensuring the rigidity in the whole region of the hood 10 for vehicles, and the protection performance of a pedestrian can be improved. Moreover, the rigidity of the island part 8 with respect to the load of an up-down direction can be reduced, and the reaction force with respect to the external force input into the upper surface of the inner panel 2 can be reduced. Thereby, the protection performance of a pedestrian can further be improved.

(2) In the inner panel 2 described above, many island slits 9 are arranged on the vehicle front side of the opening 6 rather than the vehicle rear side. Thereby, it can be set as the structure which is easy to deform | transform with respect to the load input from the vehicle front with respect to the upper surface of the vehicle hood 10, and the protection performance with respect to the pedestrian ahead of a vehicle can be improved further.
(3) The inner panel 2 is provided with a terrace-shaped second terrace surface 22 between the striker fixing portion 5 and the first terrace surface 21. The second terrace surface 22 is a descending step formed in front of the first terrace surface 21. With such a staircase structure, the inner panel 2 is easily deformed, and the pedestrian protection performance can be further improved.

(4) In the inner panel 2 described above, since the terrace slit 13 is formed between the first terrace portion 11 and the second terrace portion 12, the rigidity of the second terrace portion 12 can be reduced. Moreover, since the relative displacement of the first terrace portion 11 with respect to the second terrace portion 12 is likely to be allowed, the structure between the first terrace portion 11 and the second terrace portion 12 can be softened, and walking The protection performance of the person can be further improved.
(5) As shown in FIG. 2, the second terrace portion 12 is disposed in front of the vehicle with respect to the first terrace portion 11, and the extending direction of the terrace slit 13 is the vehicle front-rear direction. Thereby, the structure which is easy to deform | transform with respect to the load input from the vehicle front with respect to the upper surface of the hood 10 for vehicles can be implement | achieved easily, and the protection performance with respect to the pedestrian ahead of a vehicle can be improved further.

(6) As shown in FIG. 3, the bottom surface of the outer moat 3 has a shape branched into a first bottom surface 24 and a second bottom surface 25. The first bottom surface 24 functions to increase the rigidity around the hood lock device by supporting the striker fixing portion 5 with the above-described skeleton structure. On the other hand, the second bottom surface 25 functions to increase the rigidity around the grille 14 by supporting the grille reinforcing portion 16 with a skeleton structure. Such a branched structure of the outer moat 3 can efficiently improve the rigidity of the vehicle hood 10.

[3. Modified example]
In the above-described embodiment, the inner panel 2 provided with the three island portions 8 is illustrated, but the number of the island portions 8 is not limited to this. By providing at least one island portion 8 and surrounding it with the first terrace portion 11, and forming the island slit 9 between the annular portion 7 and the first terrace surface 21, the same effect as in the above-described embodiment is obtained. It becomes the structure which plays. 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.

DESCRIPTION OF SYMBOLS 1 Outer panel 2 Inner panel 3 Outer moat part 4 Striker 5 Striker fixed part 6 Opening part 7 Annular part 8 Island part 9 Island part slit 10 Vehicle hood 11 First terrace part 12 Second terrace part 13 Terrace slit 14 Grill 15 Grill support Part 16 Grill reinforcement part 21 First terrace surface 22 Second terrace surface 23 Grill terrace surface 24 First bottom surface 25 Second bottom surface

Claims

In a vehicle hood comprising an outer panel and an inner panel joined to an end portion around the outer panel and a hood lock device,
An outer moat portion extending along each end and rear end of the inner panel in the vehicle left-right direction and having a shape that is convex away from the outer panel;
A striker fixing portion, which is connected to a bottom surface of the outer moat portion, and to which a striker of the hood lock device is fixed;
An opening provided in the inner panel at the rear of the vehicle than the striker fixing portion;
An annular portion provided annularly along the periphery of the opening and bonded to the lower surface of the outer panel;
An island having a shape that is convex toward the outer panel, with the annular portion as a top surface;
A first terrace portion that forms a terrace-shaped first terrace surface between the outer moat and surrounding the entire circumference of the island portion;
Island slits that have a shape that is cut in a slit shape between the annular portion and the first terrace surface, and are arranged radially with respect to the opening,
A vehicle hood, comprising:
2. The vehicle hood according to claim 1, wherein a number of the island slits are arranged on the vehicle front side rather than the vehicle rear side of the opening.
The vehicle hood according to claim 1 or 2, further comprising a second terrace portion that forms a terrace-shaped second terrace surface between the striker fixing portion and the first terrace surface.
4. A terrace slit having a shape obtained by cutting the first terrace surface and the second terrace surface into a slit shape and extending along the inclination direction of the terrace cliff is provided. The vehicle hood as described.
The second terrace is disposed in front of the vehicle from the first terrace,
The vehicle hood according to claim 4, wherein the terrace slit extends in the vehicle front-rear direction.
A grill attached to a front end of the vehicle hood;
A grill support portion for supporting the back surface of the grill attached at the front end of the outer panel;
Forming a terrace-shaped grill terrace surface at a position lower than the striker fixing portion, and comprising a grill reinforcement portion connected to the front end side of the grill support portion at the front end portion of the inner panel;
The outer moat part extends from each end of the inner panel in the left-right direction of the vehicle toward the striker fixing part, and branches from the first bottom face toward the grill terrace surface. The vehicle hood according to any one of claims 1 to 5, further comprising a second bottom surface extending.