JP7275659B2 - vehicle hood - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vehicle hood in which reinforcing members are deployed between an outer panel and an inner panel.

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

JP-A-2006-306237 Japanese Patent Application Laid-Open No. 2016-010995

Energy when an external force acts on the vehicle hood is absorbed by the deformation of the outer panel and reinforcing member. Therefore, if the deformed shape can be controlled, the cushioning performance can be improved. On the other hand, existing vehicle hoods cannot be said to have sufficiently taken these points into consideration, and there is room for improvement. For example, by devising the structure for fixing the reinforcing member to the inner panel, it is expected that the cushioning performance will be further improved.

One of the purposes of the present invention is to control the deformed shape of the reinforcement member of the vehicle hood to improve the cushioning performance. In addition to this purpose, it is also possible to achieve actions and effects derived from each configuration shown in the "Mode for Carrying out the Invention" described later and which cannot be obtained with conventional techniques. can be positioned as a goal.

The disclosed vehicle hood is a vehicle hood in which a reinforcing member is deployed between an outer panel and an inner panel. The vehicle hood includes a planar front surface portion forming a front portion of the reinforcing member, and a planar rear surface portion extending from both left and right end portions of the front surface portion toward the vehicle rear and vehicle width direction outside. and a side portion. Further, the reinforcing portion is provided by bending the plate surface along the rear edge sides of the front surface portion and the rear surface portion, and continuously provided between the left and right rear surface portions. Further, it has any one of the following configurations (1) to (4).
(1) The reinforcing portion is connected to a first surface portion connected in an inclined direction with respect to the front surface portion or the rear surface portion, and connected in an inclined direction with respect to the first surface portion. A second surface portion that forms a valley fold groove between itself and the one surface portion; and a face portion.
(2) The tip of the reinforcing portion is provided downward with a predetermined gap from the inner panel.
(3) The inner panel has a planar surface on the rear side of the vehicle from a ridge line facing the tip of the reinforcing portion, and has a sliding surface on which the tip slides when the tip comes into contact with the inner panel.
(4) The front face portion has a pair of openings spaced apart in the vehicle width direction in front of the reinforcing portion and in the center portion in the vehicle width direction.

By connecting the reinforcing portions along the rear edges of the front and rear surfaces of the reinforcing member, it is possible to increase the rigidity in the vicinity of the rear edges, and to join the rear edges and the inner panel. Brackets and legs can be omitted. As a result, it is possible to increase the amount of deformation of the reinforcing member when an external force is applied, thereby improving the cushioning performance of the vehicle hood.

1 is an exploded perspective view of a vehicle hood as an example; FIG. It is a top view of a reinforcing member. FIG. 4 is a perspective view showing a stepped flange of a reinforcing member; (A) and (B) are cross-sectional views of a reinforcing member. FIG. 5 is a cross-sectional view for explaining deformation of the staircase flange due to external force;

[1. composition]
[1-1. Vehicle hood]
A vehicle hood 10 as an embodiment will be described with reference to FIGS. 1 to 5. FIG. The vehicle hood 10 is a member that covers the upper surface of a compartment (vehicle storage compartment such as an engine room or a motor room) provided in the front part of the vehicle. In the vicinity of the rear end of the compartment, there are provided a hinge that pivots the vehicle hood 10 with respect to the vehicle body so that the vehicle hood 10 can be opened and closed, and a spring that biases the vehicle hood 10 in the opening direction. In the vicinity of the front end of the compartment, a hood lock device for maintaining the closed state of the vehicle hood 10, a support rod used for maintaining the open state, and the like are provided.

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

The inner panel 2 is arranged below the outer panel 1 with a predetermined gap therebetween, and is joined to the outer edge of the outer panel 1 . The plate surface of the inner panel 2 is provided with unevenness for enhancing strength and rigidity. Edge portions 14 and beam portions 15 are provided on the inner panel 2 of the present embodiment. The edge portions 14 are substantially horizontal portions formed along the left and right edges of the inner panel 2 and function as reinforcing flanges. The beam portion 15 is a portion in which the plate surface is recessed downward and the recesses are connected in the longitudinal direction of the vehicle along the inner side of the edge portion 14, and functions as a structural section that increases the bending rigidity of the inner panel 2. .

The reinforcing member 3 is arranged planarly along the plate surface of the outer panel 1 in the space surrounded by the outer panel 1 and the inner panel 2 . The reinforcing member 3 is made of an aluminum alloy (for example, an Al-Mg alloy or an Al-Mg-Si alloy), and 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 when viewed from the top of the vehicle is similar to a boomerang shape curved like a bow, and is arranged in a layout such that the vicinity of the central portion in the vehicle width direction protrudes forward of the vehicle. Further, the shape of the reinforcing member 3 is bilaterally symmetrical (mirror symmetrical) when the vehicle is viewed from above. As shown in FIG. 2 , the reinforcing member 3 of this 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 from each of the left and right end portions of the front surface portion 4 toward the vehicle rear and vehicle width direction outside. A boundary line between the front surface portion 4 and the rear surface portion 5 is illustrated by a dashed line in FIG. However, the front surface portion 4 and the rear surface portion 5 are integrally formed, and the boundary between them is 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 weight. A recessed portion 19 is provided near the center of the front surface portion 4 in the vehicle width direction. The recessed portion 19 is formed in a shape in which the entire plate surface is sunk below the surrounding plate surfaces.

The reinforcing member 3 is provided with three pairs of legs 6 , 7 , 8 fixed to the inner panel 2 . These legs 6, 7, 8 extend obliquely outwardly and downwardly from the reinforcing member 3. As shown in FIG. The legs provided on the front face portion 4 are hereinafter referred to as front leg portions 6 . Further, among the legs provided on the rear surface portion 5 , the leg positioned on the vehicle outer side is called a rear leg 7 , and the leg positioned on the vehicle inner side is called the second rear leg 8 .

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

A flange 16 that is bent downward is formed at 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 the left and right ends of the flange 16 are discontinued before reaching the front leg portion 6 . A flange 16 is not formed on a portion of the front end side of the front surface portion 4 on the vehicle center side adjacent to the front leg portion 6 . On the other hand, a second flange 17 is formed at a portion on the vehicle outer side adjacent to the front leg portion 6 . The second flange 17 is a portion formed by bending the left and right side edges 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 . A rear end portion of the second flange 17 is interrupted before reaching the rear surface portion 5 .

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

The direction in which the second rear leg portion 8 extends from the rear surface portion 5 in a top view of the vehicle is the opposite direction to the front leg portion 6 and is obliquely rearward (inwardly and rearwardly of the vehicle). Further, the direction in which the rear leg portion 7 extends from the rear surface portion 5 is the front of the vehicle. As a result, the distance from the proximal end to the distal end of the rear leg portion 7 becomes longer, and the deformation stroke becomes larger when an external force acts. Moreover, compared with the case where the rear leg portion 7 is extended outward in the vehicle width direction, the rear leg portion 7 is suppressed from protruding in the vehicle width direction.

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

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

As shown in FIG. 3, the staircase flange 18 of this embodiment is formed in a stepped shape descending toward the vehicle rear side. That is, by bending the plate surface three times, the cross-sectional shape is stepped. 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 rearward of the vehicle. Further, as shown in FIG. 4A, the stepped flange 18 is provided with a first surface portion 61, a second surface portion 62, and a third surface portion 63. As shown in FIG.

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-fold groove with the first surface portion 61 . The bending direction of the second surface portion 62 is upward. At least the second surface portion 62 positioned immediately behind the recessed portion 19 is provided substantially parallel to the recessed portion 19, and its plate surface 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 ridgeline with the second surface portion 62 . The bending direction of the third surface portion 63 is downward, like the first surface portion 61 , and preferably formed at the same bending angle as the first surface portion 61 . As a result, the third surface portion 63 is substantially parallel to the first surface portion 61 . A tip 68 (lower end) of the third surface portion 63 is provided downward with a predetermined gap from the inner panel 2 .

In this embodiment, even if the tip 68 of the third surface portion 63 comes into contact with the inner panel 2, the tip 68 tends to slide 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 ridgeline 67 of the inner panel 2 . The arrangement shape of the ridgeline 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.

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

A pair of central openings 64 are provided in the recessed portion 19 of the front face portion 4 . The central opening 64 is arranged in front of the staircase flange 18 and in the center in the vehicle width direction. As shown in FIGS. 3 and 4B, the two central openings 64 are arranged side by side with a gap in the vehicle width direction. The shape of the central opening 64 is elongated in the longitudinal direction of the vehicle (for example, rectangular or trapezoidal). In this embodiment, the two central openings 64 are arranged so that the interval in the vehicle width direction is constant in the longitudinal direction. A portion sandwiched between the two central openings 64 is hereinafter referred to as a beam portion 65 . The beam portion 65 functions as a beam having a constant width extending in the longitudinal direction of the vehicle, and serves as a portion that stabilizes the elastic deformation of the staircase flange 18 in the vertical direction.

[2. action, effect]
FIG. 5 is a diagram illustrating a deformed state of the staircase flange 18 when an external force acts on the outer panel 1 from above the vehicle hood 10. As shown in FIG. The front surface portion 4 of the vehicle hood 10 described above is not provided with brackets or leg portions fixed to the inner panel 2 . Therefore, the amount of deformation of the front surface portion 4 is increased, and the step flange 18 is easily deformed so as to move downward.

When the tip 68 of the step flange 18 contacts 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 indicated by the black arrow in FIG. At this time, the stepped 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. Also, the tip 68 of the staircase flange 18 does not come into contact with any part of the inner panel 2 other than the sliding surface 66 . In this manner, the staircase flange 18 deforms with a sufficient deformation stroke when an external force acts, 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 the plate surface is bent along the rear end sides thereof. 18 are connected. With such a structure, the rigidity in the vicinity of the rear end side of the reinforcing member 3 can be increased, and 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 reinforcement member 3 can be freely deformed until the step flange 18 contacts the inner panel 2, and the amount of deformation of the reinforcement member 3 can be increased. Therefore, the cushioning performance of the vehicle hood 10 can be improved. In addition, by omitting the brackets and legs, it is possible to prevent unintended deformation due to breakage of the portion fixed to the inner panel 2 . In addition, when the method of fixing 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 connected between the left and right second rear legs 8 . As a result, the rigidity in the vicinity of the rear end side of the reinforcing member 3 can be increased, making it easier to omit the brackets and 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 it becomes easy to deform the reinforcing member 3 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 descending toward the vehicle rear side by alternately bending the rear end side of the reinforcing member 3 downward and toward the vehicle rearward. With such a structure, the rigidity of the reinforcing member 3 in the vicinity of its rear end can be increased. Further, the position of the tip 68 of the staircase flange 18 can be easily moved rearward and downward of the vehicle. Thereby, for example, when the rear end portion of the reinforcing member 3 and the inner panel 2 are far apart, the position of the tip 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, and 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 ridgeline 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 stepped flange 18 so that the bending angle becomes shallow. That is, the deformation of the staircase flange 18 can absorb the energy of the external force, and the cushioning performance of the vehicle hood 10 can be improved.

(5) As shown in FIG. 4(A), the first surface portion 61 and the third surface portion 63 are arranged in a downwardly inclined posture toward the rear of the vehicle. By slanting these surface portions 61 and 63, compared to the case where the surface portions 61 and 63 are vertical, the front end 68 can be made easier to slide toward the rear of the vehicle, 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. 4A, the tip 68 of the staircase flange 18 is provided downward with a predetermined gap from the inner panel 2 . Thereby, the reinforcement member 3 can be freely deformed at least until the tip 68 contacts 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. 4(A), the inner panel 2 is provided with a sliding surface 66 . The sliding surface 66 is formed in a planar shape behind the vehicle from a ridgeline 67 facing the tip 68 of the staircase flange 18 . Thus, by making the tip 68 of the staircase flange 18 slippery toward the rear of the vehicle, the reinforcing member 3 can be deformed even after the tip 68 contacts the inner panel 2, and a deformation stroke can be secured. can. Therefore, the cushioning performance of the vehicle hood 10 can be improved.

(8) A pair of central openings 64 are provided in front of the stair flange 18, as shown in FIG. By providing the central opening 64, the depression 19 can be easily deformed in the vertical direction. As a result, the deformation stroke of the recessed 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, beams 65 are provided between the pair of central openings 64 . The beam portion 65 functions to suppress torsional deformation of the recessed portion 19 and stabilize elastic deformation in the vertical direction. By providing the beam portion 65, the recessed 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]
The above embodiment is merely an example, and there is no intention to exclude various modifications and application of techniques not explicitly described in this embodiment. Each configuration of this embodiment can be modified in various ways without departing from the gist thereof. Also, they can be selected or combined as needed.

In the above-described embodiment, the stepped 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 times of bending 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 edge of the front surface portion 4 and the rear surface portion 5 to form a reinforcement portion, and the reinforcement portion is continuously provided between the left and right rear surface portions 5, The same functions and effects as those of the above-described embodiment can be obtained.

1 outer panel 2 inner panel 3 reinforcing member 4 front surface 5 rear surface 6 front leg 7 rear leg 8 second rear leg (leg)
9 opening 10 vehicle hood 18 staircase flange (reinforcement)
19 Recess 61 First surface 62 Second surface 63 Third surface 64 Central opening 65 Beam 66 Slide surface 67 Ridge 68 Tip

Claims (8)

A vehicle hood in which a reinforcing member is deployed between an outer panel and an inner panel,
a planar front surface portion forming the front portion of the reinforcing member;
a planar rear surface portion extending toward the rear of the vehicle and outward in the vehicle width direction from each of the left and right ends of the front surface portion;
a reinforcing portion formed by bending the plate surface along the rear edge of the front surface portion and the rear surface portion and continuously provided between the left and right rear surface portions;
The reinforcing portion is
a first surface portion connected in an inclined direction with respect to the front surface portion or the rear surface portion;
a second surface portion connected in an inclined direction with respect to the first surface portion and forming a valley-fold groove between the first surface portion and the first surface portion;
a third surface portion connected in an inclined direction with respect to the second surface portion and forming a mountain-fold ridgeline between the second surface portion and the second surface portion;
A vehicle hood, comprising: A vehicle hood in which a reinforcing member is deployed between an outer panel and an inner panel,
a planar front surface portion forming the front portion of the reinforcing member;
a planar rear surface portion extending toward the rear of the vehicle and outward in the vehicle width direction from each of the left and right ends of the front surface portion;
a reinforcing portion formed by bending the plate surface along the rear edge of the front surface portion and the rear surface portion and continuously provided between the left and right rear surface portions;
A tip of the reinforcing portion is provided downward with a predetermined gap from the inner panel.
A vehicle hood, comprising: A vehicle hood in which a reinforcing member is deployed between an outer panel and an inner panel,
a planar front surface portion forming the front portion of the reinforcing member;
a planar rear surface portion extending toward the rear of the vehicle and outward in the vehicle width direction from each of the left and right ends of the front surface portion;
a reinforcing portion formed by bending the plate surface along the rear edge of the front surface portion and the rear surface portion and continuously provided between the left and right rear surface portions;
The inner panel is formed in a planar shape on the rear side of the vehicle from a ridgeline facing the tip of the reinforcing portion, and has a sliding surface for sliding the tip when the tip contacts.
A vehicle hood, comprising: A vehicle hood in which a reinforcing member is deployed between an outer panel and an inner panel,
a planar front surface portion forming the front portion of the reinforcing member;
a planar rear surface portion extending toward the rear of the vehicle and outward in the vehicle width direction from each of the left and right ends of the front surface portion;
a reinforcing portion formed by bending the plate surface along the rear edge of the front surface portion and the rear surface portion and continuously provided between the left and right rear surface portions;
The front surface portion has a pair of openings spaced apart in the vehicle width direction at a center portion in the vehicle width direction in front of the reinforcing portion.
A vehicle hood, comprising: 2. The hood for a vehicle according to claim 1 , wherein the first surface portion and the third surface portion are arranged in a downwardly inclined posture toward the rear of the vehicle. 5. The hood for a vehicle according to claim 4 , wherein the pair of openings are arranged so that the interval in the vehicle width direction is constant in the front-rear direction. a leg portion extending toward the rear of the vehicle from the vehicle inner side edge of the rear surface portion and fixed to the inner panel;
The vehicle hood according to any one of claims 1 to 6 , wherein the reinforcing portion is provided continuously between the left and right leg portions. The hood for a vehicle according to any one of claims 1 to 7 , wherein the reinforcing portion is formed in a stepped shape descending toward the rear side of the vehicle.

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