JP2020138682A - Vehicular hood - Google Patents

Abstract

To control a deformed shape of a reinforcement member and improve cushioning performance in a vehicular hood.SOLUTION: A vehicular hood 10 is a vehicular hood 10 in which a reinforcement member 3 is expanded between an outer panel 1 and an inner panel 2, and comprises a front face part 4, a rear face part 5, and a stair flange 18. The front face part 4 is a planar part which constitutes a front part of the reinforcement member 3. The rear face part 5 is a planer part which is extended toward a vehicle width direction outer side from each of both of left and right end parts of the front face part 4. The stair flange 18 is such a part that a plate surface is bent along rear end sides of the front face part 4 and the rear face part 5, and is continuously provided between the left and right rear end faces 5.SELECTED DRAWING: Figure 3

Description

The present invention relates to a vehicle hood in which a reinforcing member is deployed between an outer panel and an inner panel.

Conventionally, in a vehicle hood that covers the upper surface of a vehicle compartment (engine room, motor room, etc.), a structure in which a reinforcing member is inserted between an outer panel and an inner panel is known. For example, a structure has been proposed in which an arch-shaped bracket is fixed to an inner panel and the plate surface of the bracket is developed along the back surface of the outer panel (see Patent Document 1). Further, a structure in which a plate-shaped reinforcing member is attached to the back surface of the outer panel to increase the rigidity has also been proposed (see Patent Document 2).

Japanese Unexamined Patent Publication No. 2006-306237 Japanese Unexamined Patent Publication No. 2016-010995

The energy when an external force acts on the vehicle hood is absorbed by the deformation of the outer panel and the reinforcing member. Therefore, if the deformed shape can be controlled, the cushioning performance can be improved. On the other hand, the existing vehicle hood cannot be said to fully consider such a point, and there is room for improvement. For example, by devising a structure for fixing the reinforcing member to the inner panel, further improvement in cushioning performance is expected.

One of the purposes of this case was devised in view of the above problems, and is to control the deformed shape of the reinforcing member of the vehicle hood to improve the cushioning performance. 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.

The disclosed vehicle hood is a vehicle hood in which a reinforcing member is deployed between the outer panel and the inner panel. This vehicle hood has a planar front surface portion forming the front portion of the reinforcing member and a planar rear surface portion extending rearward of the vehicle and outward in the vehicle width direction from each of the left and right end portions of the front surface portion. It has a direction part. Further, the plate surface is bent along the rear end side of the front surface portion and the rear surface portion, and a reinforcing portion is provided which is continuously provided between the left and right rear surface portions.

By connecting the reinforcing portions along the rear end sides of the front surface portion and the rear surface portion of the reinforcing member, the rigidity near the rear end side can be increased, and the rear end side and the inner panel can be joined. Brackets and legs can be omitted. As a result, the amount of deformation of the reinforcing member when an external force is applied can be increased, and the cushioning performance of the vehicle hood can be improved.

It is an exploded perspective view of the hood for a vehicle as an Example. It is a top view of the reinforcing member. It is a perspective view which shows the staircase flange of a reinforcing member. (A) and (B) are sectional views of the reinforcing member. It is sectional drawing for demonstrating the deformation of a staircase flange by an external force.

[1. Constitution]
[1-1. Vehicle hood]
A vehicle hood 10 as an embodiment will be described with reference to FIGS. 1 to 5. The vehicle hood 10 is a member that covers the upper surface of a compartment (an in-vehicle product accommodating room such as an engine room or a motor room) provided in the front part of the vehicle. Near the rear end of the compartment, a hinge that pivotally supports the vehicle hood 10 with respect to the vehicle body and a spring that urges the vehicle hood 10 in the opening direction are provided. Further, in the vicinity of the front end portion of the compartment, a hood lock device for maintaining the closed state of the vehicle hood 10 and a support rod used for holding the open state are provided.

As shown in FIG. 1, the vehicle hood 10 has a structure in which a reinforcing member 3 (hood lock reinforcement upper) is deployed between the outer panel 1 (hood outer panel) and the inner panel 2 (hood inner panel). Have. The outer panel 1 is a member forming the outer surface of the vehicle hood 10, and the front plate surface is subjected to design painting or uneven processing. Further, the front portion of the outer panel 1 is provided with a grill reinforcing portion 11 having an opening through which the cooling air introduced into the compartment passes. A vehicle grill 12 is attached to the grill reinforcing portion 11. The vehicle headlamp 13 is attached to the vehicle body in front of the compartment. The position of the headlamp 13 is set to a position on the left and right sides of the grill 12 in the closed state of the vehicle hood 10.

The inner panel 2 is arranged below the outer panel 1 at a predetermined interval, and is joined to the outer edge portion of the outer panel 1. The plate surface of the inner panel 2 is provided with irregularities for increasing strength and rigidity. The inner panel 2 of the present embodiment is provided with an edge portion 14 and a beam portion 15. The edge portion 14 is a substantially horizontal portion formed along the edges of the left and right ends of the inner panel 2, and functions as a reinforcing flange. Further, the beam portion 15 is a portion in which the plate surface is dented downward and the dents are connected in the front-rear direction of the vehicle along the inside of the edge portion 14, and functions as a structural cross section for increasing the bending rigidity of the inner panel 2. ..

The reinforcing member 3 is arranged in a plane shape along the plate surface of the outer panel 1 in the space surrounded by the outer panel 1 and the inner panel 2. The material of the reinforcing member 3 is an aluminum alloy (for example, Al-Mg-based alloy, Al-Mg-Si-based alloy, etc.), which is formed by processing a rolled plate. The reinforcing member 3 is fixed to the outer panel 1 and the inner panel 2. For example, the reinforcing member 3 of the present embodiment is fixed to the outer panel 1 with a mastic adhesive and fixed to the inner panel 2 by welding.

The overall shape of the reinforcing member 3 in the top view of the vehicle is similar to the boomerang shape curved in a bow shape, and is arranged so that the vicinity of the central portion in the vehicle width direction protrudes forward of the vehicle. The shape of the reinforcing member 3 is symmetrical (mirror-symmetrical) when viewed from above the vehicle. As shown in FIG. 2, the reinforcing member 3 of the present embodiment has a front surface portion 4 and a pair of rear surface portions 5. The front surface portion 4 is a planar portion forming the front portion of the reinforcing member 3. The front surface portion 4 shown in FIG. 2 is formed in a half-moon shape.

The rear surface portion 5 is a planar portion extending rearward of the vehicle and outward in the vehicle width direction from each of the left and right end portions of the front surface portion 4. The boundary line between the front surface portion 4 and the rear surface portion 5 is illustrated by a alternate long and short dash line in FIG. However, the front surface portion 4 and the rear surface portion 5 are integrally formed, and their boundaries are merely defined for convenience. A plurality of openings 9 are provided in the front surface portion 4 and the rear surface portion 5 to reduce the weight. Further, a dent portion 19 is provided near the center of the front surface portion 4 in the vehicle width direction. The dented portion 19 is formed in a shape in which the entire plate surface is subsided below the surrounding plate surface.

The reinforcing member 3 is provided with three pairs of legs 6, 7, and 8 fixed to the inner panel 2. These legs 6, 7, and 8 extend obliquely outward and downward from the reinforcing member 3. Hereinafter, the leg portion provided on the front surface portion 4 is referred to as a front leg portion 6. Further, among the legs provided on the rear surface portion 5, those located on the outside of the vehicle are referred to as rear legs 7, and those located on the inside of the vehicle are referred to as second rear legs 8.

The front leg portion 6 is a front end portion of the front surface portion 4, and is arranged on both the left and right sides of the grill reinforcing portion 11 (positions avoiding the grill 12). As shown in FIG. 2, the position of the front leg portion 6 in the top view of the vehicle is a position corresponding to the back side of the headlamp 13. The tip of the front leg portion 6 is fixed in a state of surface contact with the edge portion 14 of the inner panel 2, and is fixed by spot welding, for example. The direction in which the front leg portion 6 extends from the front surface portion 4 in the top view of the vehicle is obliquely forward (the direction toward the outside and the front of the vehicle).

A flange 16 bent downward is formed on a portion of the front end side of the front surface portion 4 sandwiched between the left and right front leg portions 6. However, both left and right ends of the flange 16 are interrupted before reaching the front leg portion 6. The flange 16 is not formed on the front end side of the front surface portion 4 on the vehicle center side portion adjacent to the front leg portion 6. On the other hand, a second flange 17 is formed at a portion on the outside of the vehicle adjacent to the front leg portion 6. The second flange 17 is a portion formed by bending the left and right side ends of the front surface portion 4 downward, and is provided so as to be connected to the plate surface of the front leg portion 6. The rear end portion of the second flange 17 is interrupted before reaching the rear surface portion 5.

The rear leg portion 7 and the second rear leg portion 8 extend from the rear surface portion 5. The rear leg portion 7 is arranged at a position closer to the rear side of the vehicle (closer to the end portion) than the outer side edge of the rear surface portion 5 of the vehicle. On the other hand, the second rear leg portion 8 is arranged at a position closer to the rear side of the vehicle (closer to the end portion) of the inner end side of the rear surface portion 5 of the vehicle. Roughly speaking, the positions of the rear leg portion 7 and the second rear leg portion 8 are set to positions corresponding to the left and right end portions (two tips) in the boomerang shape. Further, the rear leg portion 7 is arranged outside the boomerang shape, and the second rear leg portion 8 is arranged inside the boomerang shape.

The direction in which the second rear leg portion 8 extends from the rear surface portion 5 in the top view of the vehicle is the direction opposite to that of the front leg portion 6 and is obliquely rearward (the direction toward the inside and the rear of the vehicle). Further, the direction in which the rear leg portion 7 extends from the rear surface portion 5 is defined as the front of the vehicle. As a result, the distance from the base end to the tip end of the rear leg portion 7 becomes long, and the deformation stroke when an external force is applied becomes large. Further, as compared with the case where the rear leg portion 7 is extended outward in the vehicle width direction, the protrusion of the rear leg portion 7 in the vehicle width direction is suppressed.

The tip of the rear leg portion 7 is fixed (for example, spot welded) in a state of surface contact with the edge portion 14 of the inner panel 2. On the other hand, the tip of the second rear leg portion 8 is fixed in a state of surface contact with the plate surface of the inner panel 2, and is fixed by spot welding, for example. Further, as shown in FIG. 2, the second flange 17 is not formed on the outer side edge of the rear surface portion 5 of the vehicle. That is, bending deformation is allowed by intentionally not applying a reinforcing structure for increasing the moment of inertia of area near the boundary between the rear surface portion 5 and the rear leg portion 7.

[1-2. Stair flange]
A staircase flange 18 (reinforcing portion) formed by bending the plate surface is provided on the rear end side of the front surface portion 4 and the rear end side (vehicle inner end side) of the rear surface portion 5. As shown in FIGS. 2 and 3, the staircase flange 18 is continuously provided between the left and right rear surface portions 5 along the rear end sides of the front surface portion 4 and the rear surface portion 5. The staircase flange 18 is formed so as to be smoothly connected to the plate surface of the second rear leg portion 8. As a result, the entire range corresponding to the inside of the boomerang-shaped reinforcing member 3 is reinforced, and it becomes easy to reduce the number of brackets and legs fixed to the inner panel 2.

As shown in FIG. 3, the staircase flange 18 of the present embodiment is formed in a staircase shape that descends to the rear side of the vehicle. That is, the cross-sectional shape is made stepwise by bending the plate surface three times. Such a shape of the staircase flange 18 is formed by alternately bending the rear end sides of the front surface portion 4 and the rear surface portion 5 downward and toward the rear of the vehicle. Further, as shown in FIG. 4A, the staircase flange 18 is provided with a first surface portion 61, a second surface portion 62, and a third surface portion 63.

The first surface portion 61 is a planar portion connected to the front surface portion 4 and the rear surface portion 5 in an inclined direction. The bending direction of the first surface portion 61 is downward. The second surface portion 62 is a planar portion that is connected to the first surface portion 61 in an inclined direction and forms a valley-folded groove with the first surface portion 61. The bending direction of the second surface portion 62 is upward. The second surface portion 62 located at least immediately after the dent portion 19 is provided substantially parallel to the dent portion 19, and the plate surface thereof is substantially horizontal.

The third surface portion 63 is a planar portion that is connected to the second surface portion 62 in an inclined direction and forms a mountain-folded ridge line with the second surface portion 62. The bending direction of the third surface portion 63 is downward as in the first surface portion 61, and is preferably formed at the same bending angle as the first surface portion 61. As a result, the third surface portion 63 becomes substantially parallel to the first surface portion 61. Further, the tip 68 (lower end) of the third surface portion 63 is provided downward with a predetermined interval with respect to the inner panel 2.

In the present embodiment, even if the tip 68 of the third surface portion 63 comes into contact with the inner panel 2, the tip 68 becomes slippery toward the rear of the vehicle. As shown in FIG. 4A, the tip 68 of the third surface portion 63 is provided so as to face the ridge line 67 of the inner panel 2. The arrangement shape of the ridge line 67 in the top view of the inner panel 2 is U-shaped as shown in FIG. Correspondingly, the tip 68 of the third surface portion 63 is also arranged in a U shape.

The portion on the rear side of the vehicle with respect to the ridge line 67 is formed in a plane shape, and functions as a sliding surface 66 that slides the tip 68 when the tip 68 of the third surface portion 63 comes into contact. Since the tip 68 of the third surface portion 63 cannot come into contact with a position far from the ridge line 67, it is not necessary to form the entire rear side of the vehicle in a plane shape. The vicinity of the ridge line 67 (the range in which the distance to the ridge line 67 is equal to or less than a predetermined distance) may be formed in a flat shape. The sliding surface 66 does not have to be strictly flat, and may be formed as a curved surface so smooth that the tip 68 of the third surface portion 63 can slide, for example.

A pair of central openings 64 are provided in the recessed portion 19 of the front surface portion 4. The central opening 64 is arranged in front of the staircase flange 18 and at the center in the vehicle width direction. As shown in FIGS. 3 and 4B, the two central openings 64 are arranged side by side at intervals in the vehicle width direction. The shape of the central opening 64 is an elongated shape (for example, a quadrangle or a trapezoid) in the front-rear direction of the vehicle. In the present embodiment, the two central openings 64 are arranged so that the distance in the vehicle width direction is constant in the front-rear direction. Hereinafter, the portion sandwiched between the two central openings 64 is referred to as a beam portion 65. The beam portion 65 functions as a beam having a constant width extending in the front-rear direction of the vehicle, and serves as a portion for stabilizing elastic deformation in the vertical direction of the staircase flange 18.

[2. Action, effect]
FIG. 5 is a diagram illustrating a deformed state of the staircase flange 18 when an external force is applied to the outer panel 1 from above the vehicle hood 10. The front surface portion 4 of the vehicle hood 10 is not provided with brackets or legs fixed to the inner panel 2. Therefore, the amount of deformation of the front surface portion 4 increases, and the staircase flange 18 is easily deformed so as to move downward.

When the tip 68 of the staircase flange 18 comes into contact with the sliding surface 66 of the inner panel 2, the tip 68 slides along the surface of the sliding surface 66. The moving direction of the tip 68 is the direction toward the rear of the vehicle, as shown by the black arrow in FIG. At this time, the staircase flange 18 is deformed so that the bending angles of the first surface portion 61, the second surface portion 62, and the third surface portion 63 become shallow. Further, the tip 68 of the staircase flange 18 does not come into contact with a portion other than the sliding surface 66 of the inner panel 2. In this way, the staircase flange 18 is deformed with a sufficient deformation stroke when an external force is applied, and absorbs the energy of the external force.

(1) The reinforcing member 3 of the vehicle hood 10 is provided with a front surface portion 4 and a rear surface portion 5, and a staircase flange as a reinforcing portion in which a plate surface is bent along the rear end side thereof. 18 are serially installed. With such a structure, the rigidity in the vicinity of the rear end side of the reinforcing member 3 can be increased, and the brackets and legs for joining the rear end side and the inner panel 2 can be omitted. Further, when an external force is applied, the reinforcing member 3 can be freely deformed until the staircase flange 18 comes into contact with the inner panel 2, and the amount of deformation of the reinforcing member 3 can be increased. Therefore, the cushioning performance of the vehicle hood 10 can be improved. By omitting the brackets and legs, it is possible to prevent unintended deformation due to breakage of the fixed portion with the inner panel 2. In addition to this, when the fixing method of the inner panel 2 and the reinforcing member 3 is spot welding, the number of welding points can be reduced, and the welding work time and cost can be reduced.

(2) As shown in FIG. 2, the staircase flange 18 is continuously provided between the left and right second hind legs 8. As a result, the rigidity in the vicinity of the rear end side of the reinforcing member 3 can be increased, and it becomes easier to omit the bracket and the legs. Further, the buckling deformation of the rear surface portion 5 in the vicinity of the second rear leg portion 8 can be suppressed, and the reinforcing member 3 can be easily deformed as intended when an external force is applied. Therefore, the cushioning performance of the vehicle hood 10 can be improved.

(3) As shown in FIG. 3, the staircase flange 18 is formed in a staircase shape that descends to the rear side of the vehicle by alternately bending the rear end side of the reinforcing member 3 downward and toward the rear side of the vehicle. With such a structure, the rigidity in the vicinity of the rear end side of the reinforcing member 3 can be increased. Further, the position of the tip 68 of the staircase flange 18 can be easily moved to the rear and downward of the vehicle. Thereby, for example, when the rear end portion of the reinforcing member 3 and the inner panel 2 are separated from each other, the position of the tip end 68 can be appropriately set.

(4) As shown in FIG. 4A, the staircase flange 18 is provided with three surface portions (first surface portion 61, second surface portion 62, third surface portion 63). A valley fold groove is formed between the first surface portion 61 and the second surface portion 62, and a mountain fold ridge line is formed between the second surface portion 62 and the third surface portion 63. With such a structure, when the tip 68 comes into contact with the inner panel 2, it becomes easy to deform the staircase flange 18 so that the bending angle becomes shallow. That is, the energy of the external force can be absorbed by the deformation of the staircase flange 18, and the cushioning performance of the vehicle hood 10 can be improved.

(5) As shown in FIG. 4A, the first surface portion 61 and the third surface portion 63 are arranged in an inclined posture with a downward slope toward the rear of the vehicle. By making these surface portions 61 and 63 slanted, the tip 68 can be made slippery toward the rear of the vehicle as compared with the case where the surface portions 61 and 63 are vertical, and the amount of deformation of the reinforcing member 3 is increased. can do. Therefore, the cushioning performance of the vehicle hood 10 can be improved.

(6) As shown in FIG. 4 (A), the tip 68 of the staircase flange 18 is provided downward with a predetermined interval with respect to the inner panel 2. As a result, the reinforcing member 3 can be freely deformed until at least the tip 68 comes into contact with the inner panel 2 when an external force is applied, and a deformation stroke can be secured. Therefore, the cushioning performance of the vehicle hood 10 can be improved.

(7) As shown in FIG. 4A, the inner panel 2 is provided with a sliding surface 66. The sliding surface 66 is formed in a planar shape behind the ridge line 67 facing the tip 68 of the staircase flange 18. By making the tip 68 of the staircase flange 18 slippery toward the rear of the vehicle in this way, the reinforcing member 3 can be deformed even after the tip 68 comes into contact with the inner panel 2, and a deformation stroke can be secured. it can. Therefore, the cushioning performance of the vehicle hood 10 can be improved.

(8) As shown in FIG. 3, a pair of central openings 64 are provided in front of the staircase flange 18. By providing the central opening 64, the dent portion 19 can be easily deformed in the vertical direction. As a result, the deformation stroke of the dent portion 19 can be increased, and thus the deformation stroke of the staircase flange 18 can be increased. Therefore, the cushioning performance of the vehicle hood 10 can be improved.

(9) As shown in FIG. 3, a beam portion 65 is provided between the pair of central openings 64. The beam portion 65 functions to stabilize the elastic deformation in the vertical direction while suppressing the torsional deformation of the dent portion 19. By providing the beam portion 65, the dent portion 19 and the staircase flange 18 can be deformed as intended, and the cushioning performance of the vehicle hood 10 can be improved.

[3. Modification example]
The above embodiment is merely an example, and there is no intention of excluding the application of various modifications and techniques not specified in the present embodiment. 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.

In the above-described embodiment, the staircase flange 18 is formed by bending the plate surfaces of the front surface portion 4 and the rear surface portion 5 three times, but the number of bends is not limited to this. For example, the plate surface may be bent once, or the plate surface may be bent twice in a crank shape. At least, the plate surface is bent along the rear end sides of the front surface portion 4 and the rear surface portion 5 to form a reinforcing portion, and the reinforcing portion is continuously provided between the left and right rear surface portions 5. It has the same actions and effects as those of the above-described embodiment.

1 Outer panel 2 Inner panel 3 Reinforcing member 4 Front surface part 5 Rear surface part 6 Front leg part 7 Rear leg part 8 Second rear leg part (leg part)
9 Opening 10 Vehicle hood 18 Stair flange (reinforcing part)
19 Dent 61 First surface 62 Second surface 63 Third surface 64 Central opening 65 Beam 66 Sliding surface 67 Ridge line 68 Tip

Claims (9)

A vehicle hood with a reinforcing member deployed between the outer panel and the inner panel.
A planar front surface portion forming the front portion of the reinforcing member and
A planar rear surface portion extending rearward of the vehicle and outward in the vehicle width direction from each of the left and right end portions of the front surface portion.
For vehicles, the plate surface is bent along the rear end side of the front surface portion and the rear surface portion, and a reinforcing portion is provided which is continuously provided between the left and right rear surface portions. Hood. A leg portion extending from the inner end side of the rear surface portion of the vehicle toward the rear of the vehicle and fixed to the inner panel is provided.
The vehicle hood according to claim 1, wherein the reinforcing portion is continuously provided between the left and right legs. The vehicle hood according to claim 1 or 2, wherein the reinforcing portion is formed in a stepped shape that descends to the rear side of the vehicle. The reinforcing part
A first surface portion connected to the front surface portion or the rear surface portion in an inclined direction,
A second surface portion which is connected to the first surface portion in an inclined direction and forms a valley fold groove between the first surface portion and the second surface portion.
Any one of claims 1 to 3, characterized in that it has a third surface portion that is connected to the second surface portion in an inclined direction and forms a mountain fold ridge line with the second surface portion. The vehicle hood described in the section. The vehicle hood according to claim 4, wherein the first surface portion and the third surface portion are arranged in an inclined posture with a downward slope toward the rear of the vehicle. The vehicle hood according to any one of claims 1 to 5, wherein the tip of the reinforcing portion is provided downward with a predetermined distance from the inner panel. Claims 1 to 6 are characterized in that the inner panel is formed in a plane shape behind the ridge line facing the tip of the reinforcing portion and has a sliding surface that slides the tip when the tip is in contact. The vehicle hood according to any one of the above. Claims 1 to 7, wherein the front surface portion has a pair of openings arranged side by side at a center portion in the vehicle width direction and in front of the reinforcing portion at intervals in the vehicle width direction. The vehicle hood according to any one of the items. The vehicle hood according to claim 8, wherein the pair of openings are arranged so that the distance in the vehicle width direction is constant in the front-rear direction.

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