WO2015159674A1

WO2015159674A1 - Cushion structure for vehicular hood

Info

Publication number: WO2015159674A1
Application number: PCT/JP2015/059248
Authority: WO
Inventors: 浩二大石; 剛志山崎; 秀樹石飛; 吉田　正敏
Original assignee: 株式会社神戸製鋼所
Priority date: 2014-04-18
Filing date: 2015-03-25
Publication date: 2015-10-22
Also published as: JP2015205566A; CN105873809B; CN105873809A; JP6263074B2; DE102015105785A1; DE102015105785B4

Abstract

This cushion structure for a vehicular hood comprises an aluminum-made hood inner panel (20), a hood cushion, and a cushion bracket. An outer peripheral rib (30) is provided in a panel corner part (24) on the lower surface of the hood inner panel (20). An abutting part (21) is provided to the outer peripheral rib (30) in the panel corner part (24). The abutting part (21) has a recessed shape, and the upper part of the hood cushion abuts against the bottom surface of the abutting part.

Description

Cushion structure of vehicle hood

The present invention relates to a vehicle hood cushion structure having a hood inner panel.

A vehicle hood such as a front hood panel covers the engine room from above the vehicle and is configured to be openable and closable. The hood has a hood outer panel constituting an outer plate and a hood inner panel constituting an inner plate (for example, Patent Document 1).

The hood outer panel and the hood inner panel are usually formed of an iron material. In order to reduce the weight of a vehicle, it is required to use a material that is lighter than an iron material.

JP 2008-030574 A

When the hood inner panel is formed of, for example, a material containing aluminum (for example, an aluminum alloy), the function of the panel may not be ensured by simply replacing the shape in the case of iron. It is necessary to improve the durability against the load on each part of the panel and the deformation mode.

In order to construct a hood inner panel with an aluminum panel that is less rigid than a steel panel and is brittle, it is necessary to obtain basic rigidity and further relax local stress. In the basic configuration of the present plan, an outer peripheral closed cross section is formed, a bead shape is formed in the center portion for absorbing the load from above the vehicle of the hood, and these are integrated in order to minimize joining as much as possible. . With respect to the inner panel in which such a complicated structure is adopted to reduce the local stress while ensuring the panel rigidity, it is particularly desired to distribute the load and ensure the rigidity of the contact portion of the hood cushion at the corner of the panel where stress is likely to concentrate.

The present invention has been made to solve the above-mentioned problems, and its object is to improve the rigidity of the corners of a panel when a hood inner panel of a vehicle hood is formed of a material containing aluminum. It is to be able to distribute the load.

In order to achieve the above object, a cushion structure for a vehicle hood according to the present invention comprises an inner plate of a vehicle hood that covers an engine room from above the vehicle so as to be opened and closed, and a hood inner panel formed of a material containing aluminum. A vehicle hood cushion structure comprising: a hood cushion that contacts a contact portion formed on a lower surface of the hood inner panel; and a cushion bracket that supports the hood cushion on a vehicle body side. An outer peripheral rib extending in the vehicle width direction and in the rear of the vehicle is provided at least at the panel corner, and the abutting portion is disposed on the outer peripheral rib of the panel corner, and the abutting portion has a concave shape that is recessed above the vehicle. Yes, the vehicle upper part of the hood cushion contacts the bottom surface.

In the aspect of the cushion structure of the vehicle hood according to the present invention, the outer peripheral rib includes an inner ridge line portion standing on the vehicle lower side from the basic surface of the lower surface, a vehicle front direction and a vehicle width direction of the inner ridge line portion. An outer ridge line portion standing on the lower side of the vehicle from the basic surface, and a downward facing surface portion connecting the inner ridge line portion and the outer ridge line portion, the shape of the bottom surface of the contact portion and the contact portion The contour shape of the outer peripheral ridge line of the concave shape is circular, elliptical, or oval, and a part of the inner ridge line portion or a part of the outer ridge line portion of the outer peripheral rib and one of the outer peripheral ridge lines of the concave shape. The part is configured to be integrated.

In one aspect of the vehicle hood cushion structure according to the present invention, the outer peripheral rib includes a front-rear extending portion extending in the vehicle front-rear direction along the vehicle body side surface, and a width direction extending in the vehicle width direction at the vehicle body front portion. A hood hinge attachment surface is formed on the downward surface portion of the rear portion of the vehicle in the front and rear extension portion. In the outer peripheral rib from the contact portion to the hood hinge mounting surface, at least one of the inner ridge line portion and the outer ridge line portion of the outer peripheral rib is continuously formed.

In the vehicle hood cushion structure according to the aspect of the invention, the width of the downward surface portion of the outer peripheral rib may be increased from the front-rear extension portion toward the rib corner portion or in the width direction. It is comprised so that it may become large as it goes to the said rib corner | angular part from an extending part.

In one aspect of the vehicle hood cushion structure according to the present invention, a plurality of inner ribs extending in the vehicle width direction are provided inside the outer peripheral rib, and the inner rib is the inner ridge line of the outer peripheral rib. It arrange | positions so that there may be space | interval with respect to a part.

According to one aspect of the present invention, when a load acts on the concave shape of the contact portion, it becomes a tensile load and can withstand the stress generated compared to a flat surface or a convex shape. It becomes possible to diffuse in the front-rear direction and the inner side in the vehicle width direction.

Moreover, according to one aspect of the present invention, the outer peripheral rib is formed of a ridge line portion and a flat portion, thereby forming a trapezoidal shape in a cross-sectional view and ensuring high rigidity. Furthermore, since the outer peripheral ridgeline of the contact portion of the hood cushion is a curve without corners, the generation of local stress can be reduced, and the contact of the hood cushion can be achieved by integrating the peripheral ridgeline and the ridgeline portion of the outer peripheral rib. It becomes possible to disperse the load of the part to the ridge line efficiently.

In addition, according to one aspect of the present invention, when the ridgeline is formed as long as possible along the outer periphery of the vehicle hood, the rigidity of the vehicle hood can be ensured and the load can be distributed by communicating each load portion. It becomes possible. Furthermore, the range in which the load can be distributed is increased by extending the ridge line portion that continues to the corner portion of the panel rearward or by extending in the vehicle width direction. In particular, since a large load that supports the entire hood acts on the hood hinge, it is possible to disperse the load from the hood cushion to the hood hinge mounting surface by continuously forming the ridge line part of the outer peripheral rib. When the vehicle hood is supported by the hood hinge, it is possible to ensure rigidity from the hood hinge mounting surface to the panel corner so as to maintain the hood shape.

Further, according to one aspect of the present invention, the base for securing the rigidity of the vehicle hood is added to the two hood hinge mounting surfaces, and the rigidity at the two corners of the panel at the front of the vehicle is ensured. Rigidity that retains the shape of the hood can be ensured. For this reason, the closed cross section of the panel corner (closed cross section formed by the hood inner panel and the hood outer panel) can be set larger than the periphery of the panel corner.

Further, according to one aspect of the present invention, by providing the inner rib, rigidity is secured, and the load can be deformed and absorbed with respect to the load from above the vehicle to the vehicle hood. Generally, the rigidity of the panel is improved by stretching the rib around the panel. However, regarding the portion where the ribs intersect in a T-shape, there is a concern that the ridgeline of the ribs is interrupted, resulting in a decrease in rigidity. In a state where the ridge line portion of the outer peripheral rib (particularly the front and rear extension portion) is interrupted, it causes a reduction in rigidity. Therefore, in one aspect of the present invention, the outer peripheral rib and the inner rib are made independent so that the ridge line portion is not interrupted. . Thereby, the rigidity of a hood inner panel can be improved.

It is the fragmentary perspective view which looked at the cushion structure of the vehicle hood of one Embodiment which concerns on this invention from the vehicle diagonally forward from the downward direction. It is a partial bottom view which shows the right side from the vehicle width direction center by the vehicle downward view of the hood inner panel of FIG. It is the expanded bottom view to which the A section of FIG. 2 was expanded. FIG. 4 is a sectional view taken along line BB in FIG. 3.

Hereinafter, an embodiment of a cushion structure for a vehicle hood according to the present invention will be described with reference to the drawings (FIGS. 1 to 4). FIG. 1 is a schematic perspective view of the cushion structure of the vehicle hood according to the present embodiment as viewed from the slightly forward side of the vehicle obliquely, and shows a state where the front hood panel 10 is slightly opened. In FIG. 1, the vehicle body side is shown virtually. FIG. 2 is a partial bottom view showing the right side from the center in the vehicle width direction when the hood inner panel 20 of FIG. 1 is viewed from below the vehicle. FIG. 3 is an enlarged bottom view in which the portion A of FIG. 2 is enlarged. 4 is a schematic cross-sectional view taken along the line BB in FIG.

As shown in FIG. 1, the cushion structure of the vehicle hood of the present embodiment includes a vehicle hood (front hood panel 10), a hood cushion 2 that supports the front hood panel 10, and a cushion bracket that supports the cushion. 3. In addition, a lamp support brace 5, a hood lock member 6, and an apron side member 7 are provided at the front of the vehicle having the structure.

Apron side members 7 are arranged in pairs with a space in the vehicle width direction (indicated by arrow A1 in FIG. 1). Each apron side member 7 is arrange | positioned along the vehicle front-back direction. The lamp support brace 5 is formed so as to extend upward from the front end portion of the apron side member 7 in the vehicle front-rear direction (indicated by an arrow A2 in FIG. 1). Both ends of the hood lock member 6 in the vehicle width direction are respectively attached to upper ends of the pair of lamp support braces 5 in the vehicle vertical direction (indicated by an arrow A3 in FIG. 1). The hood lock member 6 extends in the vehicle width direction and connects a pair of lamp support braces 5.

The front hood panel 10 is a member that covers the engine room at the front of the vehicle so as to be openable and closable from above the vehicle, and includes a hood outer panel 12 that forms an outer plate and a hood inner panel 20 that forms an inner plate. The

panels

12 and 20 are made of a material containing aluminum, for example, an aluminum alloy.

The hood inner panel 20 is arranged with a space in the vehicle vertical direction below the hood outer panel 12 with respect to the hood outer panel 12, and is fixed to the hood outer panel 12. As shown in FIGS. 2 and 3, the hood inner panel 20 is formed with a plurality of ribs. In this example, an outer peripheral rib 30 and an inner rib 40 are provided. The shape of these ribs will be described later. Further, a contact portion 21 is provided on the lower surface of the hood inner panel 20 in the vehicle vertical direction (hereinafter referred to as the vehicle lower surface). Further, a striker mounting portion 29 is provided at the center of the vehicle width direction (left side in FIG. 2) at the front portion of the hood inner panel 20 in the vehicle front-rear direction.

As shown in FIG. 1, the cushion bracket 3 is a member that supports the hood cushion 2 at an upper portion in the vehicle vertical direction, and is formed so as to extend upward from the upper end portion of the lamp support brace 5 in the vehicle vertical direction. The hood cushion 2 is disposed at the upper end of the cushion bracket 3 in the vehicle vertical direction. The hood cushion 2 abuts on the abutment portion 21 of the hood inner panel 20 and supports the front hood panel 10.

Here, the outer peripheral rib 30, the inner rib 40, the contact portion 21 and the like of the hood inner panel 20 will be described.

The outer peripheral rib 30 is a rib provided on the lower surface of the vehicle of the hood inner panel 20. The outer peripheral rib 30 extends in the vehicle width direction toward the panel corner portion 24 at the front portion of the vehicle, curves toward the rear of the vehicle at the panel corner portion 24, and extends toward the rear of the vehicle at the outer portion in the vehicle width direction (see FIG. 2). That is, the outer peripheral rib 30 is a rib provided along the outer peripheral portion of the hood inner panel 20. Although both are omitted in the drawing, the outer peripheral rib 30 is similarly provided on the left side of the hood inner panel 20 as viewed from below the vehicle.

The outer peripheral rib 30 includes a front / rear extending portion 31, a width direction extending portion 33, and a rib corner portion 32. The front-rear extension portion 31 extends in the vehicle front-rear direction along the side surface of the vehicle body. The width direction extending portion 33 extends in the vehicle width direction at the front portion of the vehicle body. The rib corner portion 32 includes a portion where the front-rear extending portion 31 and the width direction extending portion 33 intersect.

Further, as shown in FIGS. 3 and 4, the outer peripheral rib 30 has an inner ridge line portion 35, an outer ridge line portion 36, and a downward surface portion 37. The inner ridge line portion 35 is erected downward from the basic surface 39 of the lower surface of the hood inner panel 20 in the vehicle vertical direction. The outer ridge line portion 36 is erected downward in the vehicle vertical direction from the basic surface 39 on the lower surface of the vehicle on the vehicle front side and the vehicle width direction outer side of the inner ridge line portion 35. The downward surface portion 37 connects the inner ridge line portion 35 and the outer ridge line portion 36. That is, as shown in FIG. 4, the transverse cross section of the outer peripheral rib 30 has a trapezoidal shape that protrudes downward from the vehicle.

The distance between the inner ridge line portion 35 and the outer ridge line portion 36 of the outer peripheral rib 30, that is, the width of the downward surface portion 37 becomes wider from the front-rear extension portion 31 toward the rib corner portion 32. Similarly, the width becomes wider from the width direction extending portion 33 toward the rib corner portion 32.

The abutting portion 21 is provided on the lower surface of the hood inner panel 20. The abutting portion 21 has a concave shape that is recessed above the vehicle, and the upper portion of the hood cushion 2 abuts against the concave bottom surface. At this time, there is a gap between the hood cushion 2 and the concave shape so that the hood cushion 2 can freely enter and exit. The contact portion 21 is formed in the area of the outer peripheral rib 30 formed in the panel corner portion 24 on both sides in the vehicle width direction. In this example, the contact portion 21 is formed in the downward surface portion 37 of the rib corner portion 32 in the region of the rib corner portion 32 of the outer peripheral rib 30.

The shape of the bottom surface of the contact portion 21 and the contour shape of the concave outer peripheral ridge line 22 of the contact portion 21 are circular. A part of the concave outer peripheral ridge line 22, a part of the inner ridge line part 35 of the outer peripheral rib 30, and a part of the outer ridge line part 36 are configured to be integrated. That is, the concave shape is a structure in which the height and width are gently changed.

Also, a hood hinge mounting surface 25 is formed on the downward surface portion 37 of the vehicle longitudinal direction rear portion of the longitudinally extending portion 31. Although illustration of a hood hinge is abbreviate | omitted, the said hood hinge is a member provided in order to make the front hood panel 10 openable and closable. The hood hinge attachment surface 25 is provided in the front-rear extending portions 31 of the outer peripheral ribs 30 on both sides in the vehicle width direction. FIG. 2 shows only the right side of the vehicle viewed from below.

From the contact part 21 to the hood hinge mounting surface 25, the inner ridge part 35 of the outer peripheral rib 30 is formed so as to extend continuously. Similarly, the outer ridge line portion 36 continuously extends from the contact portion 21 to the hood hinge mounting surface 25.

As shown in FIG. 2, a plurality of inner ribs 40 are formed inside the outer peripheral ribs 30 on the lower surface of the hood inner panel 20. Each of these inner ribs 40 extends in the vehicle width direction and is formed at an interval in the vehicle longitudinal direction. The inner rib 40 is arranged so as to be spaced from the inner ridge line portion 35 of the outer peripheral rib 30.

Further, the outer peripheral rib 30 is configured to connect between the hood hinge mounting surfaces 25 on both sides in the vehicle width direction, and has a structure in which a smooth cross section is connected over the entire outer periphery of the hood inner panel 20.

As can be seen from the above description, according to the present embodiment, when a load acts on the concave shape of the contact portion 21, it becomes a tensile load, and can withstand and receive stress generated compared to a flat or convex shape. The load can be diffused by the outer peripheral rib 30 in the vehicle front-rear direction and the vehicle width direction inner side.

In addition, according to the present embodiment, by configuring the outer peripheral rib 30 with the

ridge portions

35 and 36 and the flat portion 37, a trapezoidal shape is obtained in a cross-sectional view, and high rigidity can be ensured. Furthermore, since the outer peripheral ridge line 22 of the contact portion 21 of the hood cushion 2 is a curve having no corners when viewed from the lower side of the vehicle, the generation of local stress can be reduced, and the outer peripheral ridge line 22 and the ridge line portion 35 of the outer peripheral rib 30 are reduced. , 36 are integrated, the load of the contact portion 21 of the hood cushion 2 can be efficiently distributed to the

ridge line portions

35, 36.

Further, when the

ridge portions

35 and 36 are formed as long as possible along the outer periphery of the vehicle hood, the rigidity of the hood inner panel 20 can be ensured and the load can be distributed by connecting each load portion. In this example, it is possible to further suppress and disperse the stress concentration by smoothly connecting the outer peripheral rib 30 from the hood hinge mounting surface 25 to the striker mounting portion 29 without interruption.

Furthermore, the range in which the load can be distributed is increased by extending the

ridges

35 and 36 continuing to the panel corner 24 to the rear or by extending in the vehicle width direction. In particular, since a large load that supports the entire hood acts on the hood hinge, the load from the hood cushion 2 is distributed to the hood hinge mounting surface 25 by continuously forming the

ridge portions

35 and 36 of the outer peripheral rib 30. Can be made. On the other hand, when the vehicle hood is supported by the hood hinge, it is possible to ensure the rigidity from the hood hinge mounting surface 25 to the panel corner 24 so as to maintain the shape of the vehicle hood.

Rigidity that maintains the shape of the hood inner panel 20 by securing the rigidity of the two corners of the panel corner 24 at the front of the vehicle in addition to the two hood hinge mounting surfaces 25 as the base for securing the rigidity of the hood inner panel 20 Can be secured. For this reason, the closed cross section of the panel corner 24, in this example, the closed cross section formed by the hood inner panel 20 and the hood outer panel 12 can be set larger than the periphery of the panel corner 24.

By providing the inner rib 40, the rigidity is secured, and the load can be deformed and absorbed with respect to the load from above the vehicle to the vehicle hood.

Generally, the rigidity of the panel is improved by placing ribs around the panel. However, regarding the portion where the ribs intersect in a T-shape, there is a concern that the ridgeline of the ribs is interrupted, resulting in a decrease in rigidity. In particular, the front and rear extending portion 31 of the outer peripheral rib 30 causes a reduction in rigidity when the

ridge line portions

35 and 36 are interrupted. Therefore, in the present embodiment, the outer peripheral rib 30 and the inner rib 40 are provided so that the

ridge line portions

35 and 36 are not interrupted. Is independent. Thereby, the rigidity of the hood inner panel 20 is improved.

Further, by setting the hot wax working port 27 in a concave shape within the ridge line (downward surface portion 37), similarly to the cushion abutting portion 21, the input from the hood cushion 2 is the periphery of the hot wax working port 27. Concentrating on can be suppressed.

The description of the above embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

In the above embodiment, both the hood inner panel 20 and the hood outer panel 12 are made of an aluminum alloy, but the present invention is not limited to this. The hood outer panel 12 may be made of steel or resin.

Further, the shape of the bottom surface of the contact portion 21 and the contour shape of the concave outer peripheral ridge line 22 of the contact portion 21 are circular. However, the shape is not limited to this, and may be oval or oval.

In the above example, both the inner ridge line part 35 and the outer ridge line part 36 of the outer peripheral rib 30 continuously extend from the contact part 21 to the hood hinge mounting surface 25, but this is not limitative. It is sufficient that at least one of the inner ridge line portion 35 and the outer ridge line portion 36 extends.

Further, in the contact portion 21, a part of the concave outer peripheral ridge line 22, a part of the inner ridge line part 35 and a part of the outer ridge line part 36 of the outer peripheral rib 30 are configured to be integrated. However, it is not limited to this. Either one may be integrated.

DESCRIPTION OF SYMBOLS 1 Front hood 2 Hood cushion 3 Cushion bracket 5 Lamp support brace 6 Hood lock member 7 Apron side member 10 Front food panel 12 Hood outer panel 20 Hood inner panel 21 Contact part 22 Outer peripheral edge 24 Panel corner part 25 Hood hinge mounting surface 27 Hot Wax working port 29 Striker mounting portion 30 Outer peripheral rib 31 Front / rear extending portion 32 Rib corner portion 33 Width direction extending portion 35 Inner ridge line portion 36 Outer ridge line portion 37 Downward surface portion 39 Basic surface 40 Inner rib

Claims

A hood inner panel formed of a material containing aluminum, constituting an inner plate of a vehicle hood that covers the engine room from above the vehicle so as to be opened and closed;
A hood cushion that comes into contact with a contact portion formed on the lower surface of the hood inner panel;
A cushion bracket for supporting the hood cushion on the vehicle body side;
In a vehicle hood cushion structure having
At least the panel corner of the lower surface of the hood inner panel is provided with outer peripheral ribs extending in the vehicle width direction and the vehicle rear,
The abutting portion is arranged on the outer peripheral rib of the panel corner,
The vehicular hood cushion structure, wherein the abutment portion has a concave shape recessed upward in the vehicle, and a vehicle upper portion of the hood cushion abuts on a bottom surface thereof.
The outer peripheral rib includes an inner ridge line portion standing on the vehicle lower side from the basic surface of the lower surface, an outer ridge line portion standing on the vehicle front side and the vehicle width direction outer side of the inner ridge line portion on the vehicle lower side from the basic surface, A downwardly facing surface part connecting the inner ridge line part and the outer ridge line part,
The shape of the bottom surface of the contact portion and the contour shape of the concave outer peripheral ridge line of the contact portion are circular, elliptical, or oval,
2. A part of the inner ridge line part or a part of the outer ridge line part of the outer peripheral rib and a part of the concave outer ridge line part are configured to be integrated. The cushion structure of the vehicle hood as described in 2.
The outer peripheral rib includes a front-rear extending portion extending in the vehicle front-rear direction along the vehicle body side surface, a width-direction extending portion extending in the vehicle width direction at the front portion of the vehicle body, the front-rear extending portion, and the width-direction extending portion. Rib corners made up of parts that intersect,
A hood hinge mounting surface is formed on the downward surface portion of the vehicle rear portion of the front-rear extension portion,
The outer peripheral rib from the abutting portion to the hood hinge mounting surface is formed such that at least one of the inner ridge line portion and the outer ridge line portion of the outer peripheral rib is continuously formed. The cushion structure of the vehicle hood as described in 2.
The width of the downward surface portion of the outer peripheral rib is configured to increase from the front-rear extension portion to the rib corner portion, or to increase from the width direction extension portion to the rib corner portion. The vehicle hood cushion structure according to claim 2, wherein the vehicle hood cushion structure is provided.
The width of the downward surface portion of the outer peripheral rib is configured to increase from the front-rear extension portion to the rib corner portion, or to increase from the width direction extension portion to the rib corner portion. The cushion structure of the hood for vehicles of Claim 3 characterized by the above-mentioned.
A plurality of inner ribs extending in the vehicle width direction are provided inside the outer peripheral ribs,
The cushion for a vehicle hood according to any one of claims 2 to 5, wherein the inner rib is disposed so as to be spaced from the inner ridge line portion of the outer peripheral rib. Construction.