JP2010116074A - Vehicle hood structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle hood structure suppressing a downward deformation of a hood when a collision object collides with the hood from above the hood. <P>SOLUTION: An outer panel 4 and an inner panel 5 are partially vertically connected to each other to form a closed cross-section and construct a hood skeleton 6 along the outer periphery of the hood. A load transmission part 8 extending in a vehicle width direction is formed by substantially linearly connecting the outer panel 4 and the inner panel 5 lying at an inside portion surrounded by the hood skeleton 6. The load transmission part 8 is coupled to the hood skeleton 6. The load transmission part 8 is made into a continuous substantially linear shape by discontinuously forming a plurality of connection portions 9, in which the outer panel 4 and the inner panel 5 are partially vertically connected to each other, at optional spaced intervals in the vehicle width direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle hood structure.

For example, in Patent Document 1, in a vehicle hood structure including an outer panel and an inner panel, a mountain shape is formed along a vehicle width direction in a central region excluding an outer peripheral edge portion formed by joining the outer peripheral edge of a hood to a skeleton. A technique is disclosed in which a bead is formed on an inner panel, and the bead is joined to the outer panel with an adhesive filled in a recess formed on the top of the bead to increase the hood rigidity.
JP 2006-44311 A

  However, in the technique of Patent Document 1, since both ends of the bead and the outer peripheral edge forming the skeleton of the outer periphery of the hood are separated from each other (not connected), when the collision part collides from above the hood, the hood It is conceivable that the hood is greatly deformed downward and the parts in the engine room below the hood come into contact with the hood.

  Therefore, the present invention provides a vehicle hood structure that can suppress downward deformation of the hood when the hood collides with the hood from above.

  In the present invention, the outer panel and the inner panel of the inner part surrounded by the hood skeleton formed along the outer periphery of the hood are joined so as to be substantially linear to form a load transmission portion extending in the vehicle width direction, The load transmission portion was connected to the hood skeleton portion.

  According to the vehicle hood structure of the present invention, the outer panel and the inner panel of the inner part surrounded by the hood skeleton formed along the outer periphery of the hood are joined so as to be substantially linear and extend in the vehicle width direction. By forming a load transmission part and connecting the load transmission part to the hood skeleton part, when a collision object collides with the hood from above the hood, the impact is connected from the load transmission part to the load transmission part. It is transmitted to the hood skeleton, and the impact load can be dispersed and absorbed throughout the hood. As a result, in the present invention, the impact load is concentrated and energy is not absorbed, and the hood can be prevented from being locally deformed downward.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

"Structure explanation of vehicle hood structure"
1 is a cross-sectional view when the vehicle hood structure of the present embodiment is attached to a vehicle body, FIG. 2 is an exploded perspective view of the vehicle hood structure of the present embodiment, and FIG. 3 is a plan view of the inner panel of FIG. 4 (A) is a cross-sectional view taken along line AA in FIG. 3, FIG. 4 (B) is a cross-sectional view taken along line BB in FIG. 3, FIG. 4 (C) is a cross-sectional view taken along line CC in FIG. It is the DD sectional view taken on the line of FIG.

  In FIG. 2, the arrow X represents the vehicle width direction, the arrow Z represents the vehicle height direction, the arrow FR represents the vehicle front, and the arrow RR represents the vehicle rear.

  As shown in FIGS. 1 to 5, the vehicle hood structure of the present embodiment includes a front hood (vehicle hood of the present invention) 2 that covers an engine room 1 formed at the front of a vehicle body of an automobile so as to be opened and closed. . The front hood 2 is supported by the vehicle body 3 via a hood hinge (not shown) at the rear part of the hood skeleton, which will be described later, and the vehicle body 3 by a hood lock device (not shown) provided at the front part of the hood skeleton, also described later. It is supported by.

  The front hood 2 includes an outer panel 4 that forms the outer surface of the hood, and an inner panel 5 that is disposed on the inner side (back surface side) of the outer panel 4 and forms the inner surface of the hood. The outer panel 4 and the inner panel 5 partially join each other's outer peripheral edge portions to form a closed cross section and constitute the hood skeleton portion 6 along the outer periphery of the hood. The hood skeleton 6 includes a hood skeleton front 6A provided in the vehicle front FR along the vehicle width direction X, a hood skeleton rear 6B provided in the vehicle rear RR along the vehicle width direction X, Left and right hood skeleton part side portions 6C and 6D provided along the vehicle front-rear direction on both sides in the width direction are formed continuously to form a rectangular frame shape in plan view.

  A bead portion (7A, 7B, 7C) 7 that protrudes from one surface of the inner panel 5 (the surface facing the engine room 1) 5a to the engine room 1 side is provided in the inner portion surrounded by the hood skeleton 6. ing. The bead portion 7 is formed to extend in the vehicle width direction X as a protrusion having a substantially trapezoidal cross section protruding from the one surface 5a of the inner panel 6 toward the engine room 1 side. In the bead portion 7, both end portions 7a and 7b extending in the vehicle width direction X are not connected to the hood skeleton portion side portions 6C and 6D. A plurality (three in this embodiment) of the bead portions 7 are formed at a predetermined interval from the vehicle front FR to the vehicle rear RR. The bead portion 7A near the front of the vehicle and the bead portion 7B near the center have substantially the same length. The rear bead portion 7C is approximately half the length of the former bead portions 7A and 7B.

  In addition, the front hood 2 is joined to the outer panel 4 and the inner panel 5 in an inner portion surrounded by the hood skeleton portion 6 so as to be substantially linear, and a load transmission portion (8A) extending in the vehicle width direction. , 8B, 8C, 8D) 8. The load transmitting portion 8 is a substantially linear shape formed by intermittently forming a plurality of joint portions 9 in which the outer panel 4 and the inner panel 5 are partially joined in the vertical direction at an arbitrary interval in the vehicle width direction X. It is said.

  The joint portion 9 is made of a mastic formed by partially spot-joining the outer panel 4 and the inner panel 5 with, for example, an adhesive. By forming a plurality of these mastics intermittently at an arbitrary interval in the vehicle width direction X, a load transmitting portion 8 having a continuous substantially linear shape is obtained. In the present embodiment, it is provided between each of the three bead portions 7A, 7B, 7C, between the bead portion 7A provided near the front of the vehicle and the hood frame front portion 6A, and close to the vehicle rear. Between the bead portion 7C and the rear portion B of the hood skeleton portion, a joint portion 9 is formed, and four rows of load transmitting portions 8 are provided in the vehicle front-rear direction.

  The load transmission portion 8 has both ends in the vehicle width direction X connected to the hood skeleton portion side portions 6C and 6D. The connection used here does not directly connect the joint portions 9 formed at both ends intermittently at an arbitrary interval in the vehicle width direction X to the hood skeleton side portions 6C and 6D. This includes the case where the joint portion 9 is provided in the vicinity of the hood skeleton portion side portions 6C and 6D.

`` Load transmission explanation ''
FIG. 6 is a diagram showing a simplified load transmission path in the vehicle hood structure of the present embodiment, and FIG. 7 is a diagram showing a simplified load transmission path when the load transmission portion is formed in the vehicle longitudinal direction. . In FIG. 6, the load transmitting portions 8A and 8B are simplified as only two rows.

  When a load acts on the front hood 2 configured as described above from the upper part of the hood (collision), a part of the applied load F1 is from the load application point 10 to the vehicle width as shown by the arrow in FIG. After being transmitted to the hood skeleton part side parts 6C and 6D connected to both ends through the load transmission part 8B extending in the direction, it is transmitted to both hinge parts 11 and 11 at the rear of the vehicle. Further, the other load F2 is transmitted from the load application point 10 to the load transmitting portion 8B to the hood skeleton side portions 6C and 6D on both sides as shown by the arrows in FIG. It is transmitted to the hood lock device 12 provided at the front center through the connected hood skeleton front part 6A.

  Further, since the bead portion 7 shown in FIG. 1 is formed between the load transmitting portions 8 in the vehicle width direction, the load is transmitted in the vehicle width direction in which the bead portion 7 extends. Without the bead portion 7, the load is transmitted radially from the load input point 10 to the restraint points such as the hinge portion 11 and the hood lock device 12, so the direction of load transmission cannot be determined.

  As described above, in the vehicle hood structure of the present embodiment, the load input to one place is transferred from the load transmitting portions 8A and 8B to the hood skeleton portion front portion 6A and the hood skeleton portion side portions 6C and 6D. After being transmitted, since it is finally transmitted to the hinge portion 11 and the hood lock device 12 having high rigidity, the transmission path can be made sufficiently long, so that the input load can be dispersed and absorbed by the entire hood.

  On the other hand, as shown in FIG. 7, when the load transmitting portions 8A, 8B, and 8C are provided to extend in the vehicle front-rear direction, some of the applied loads F1 are indicated by arrows in FIG. After being quickly transmitted to the rear portion 6B of the hood frame portion through the load transmitting portion 8B extending in the vehicle front-rear direction from the load application point 10, it is transmitted to both the hinge portions 11 and 11 at the rear of the vehicle. Further, the other load F2 is transmitted from the load application point 10 to the hood lock device 12 provided directly in the center of the front through the load transmitting portion 8B as shown by the arrow in FIG.

  As described above, if the load transmitting portion 8 is provided so as to extend in the vehicle front-rear direction, the load transmitting path from the load acting point 10 to the restraining points of the hinge portion 11 and the hood lock device 12 is the load transmitting portion 8. Is shorter than that of the present embodiment provided so as to extend in the vehicle width direction X, and the absorption efficiency of the input load is deteriorated. That is, in the structure of FIG. 7, the input load is transmitted from the load application point 10 to the hood skeleton front part 6A and the hood skeleton rear part 6B before and after the vehicle without being transmitted to the hood skeleton side parts 6C and 6D on both sides. However, in the structure of the present embodiment, the input load can be absorbed by the entire hood because the hood deformation portion increases as the input load is transmitted to the left and right hood frame side portions 6C and 6D. It becomes.

"Effect"
According to the vehicle hood structure of the present embodiment, the outer panel 4 and the inner panel 5 are joined so as to be substantially linear, and the load transmitting portions 8 extending in the vehicle width direction are connected to the hood skeleton portions 6 at both ends thereof. Therefore, when a collision object collides from above the hood, the load due to the collision can be transmitted from the load transmission unit 8 to the hood frame unit 6 connected to both ends thereof, and the load is transmitted to the entire hood by increasing the load transmission path. Can be dispersed and absorbed. Therefore, according to this invention, it can suppress that a hood deform | transforms locally, can reduce the quantity which deform | transforms into the engine room 1, and can avoid interference with a hood and engine room components.

  Further, according to the vehicle hood structure of the present embodiment, since the load transmitting portions 8 are provided in a plurality of rows at arbitrary intervals in the vehicle front-rear direction, the hood front end side portion, the hood center vicinity portion, the hood rear portion from above the hood Even if an input load acts on the end side portion, a load input to any position can be transmitted to the hood skeleton portion connected to both ends thereof.

  Further, according to the vehicle hood structure of the present embodiment, the load transmitting portion 8 is intermittently connected at an arbitrary interval in the vehicle width direction with the joint portion 9 in which the outer panel 4 and the inner panel 5 are partially joined up and down. Thus, the load transmitting portion 8 can be spot-joined while leaving the closed cross section by the outer panel 4 and the inner panel 5.

  Further, according to the vehicle hood structure of the present embodiment, the bead portion 7 extending in the vehicle width direction and protruding downward is provided on the inner panel 5 between the load transmission portions 8 provided in a plurality of rows. The bead portion 7 can increase the hood rigidity and provide load transmission directionality.

  In addition, according to the vehicle hood structure of the present embodiment, the hood skeleton part front part 6A and the hood skeleton part rear part 6B are supported by the vehicle body 3, so that the load input to the hood from the upper part of the hood extends in the vehicle width direction. The hinge is transmitted from the existing load transmitting portion 8 to the hood skeleton side portions 6C and 6D connected to both ends thereof, or from the hood skeleton portion side portions 6C and 6D to the hood skeleton portion front portion 6A or the hood skeleton portion rear portion 6B. Since it is transmitted to the vehicle body 3 via the part 11 and the hood lock device 12, the load can be dispersed and absorbed by the entire hood.

"Other embodiments"
The specific embodiment to which the present invention is applied has been described above, but the present invention is not limited to the above-described embodiment.

  In the above-mentioned embodiment, although the junction part 9 was formed with the adhesive agent (mastic), it can replace with a mastic and can use a thing like a foaming material. In short, when forming the joint portion 9, it is only necessary to play a role of transmitting a load from the outer panel 4 to the out-of-plane direction of the inner panel 5.

  In addition, in the vehicle hood structure shown in FIG. 8, in each of the load transmission portions 8A to 8D provided in a plurality of rows at an arbitrary interval in the vehicle front-rear direction, as shown in FIG. The distance H2 between the joints 9 of the load transmission parts 8C, 8D provided in the vehicle rear RR is narrower than the distance H1 between the joints 9 of the transmission parts 8A, 8B. By doing in this way, the rigidity of the hood rear part M2 can be made higher than the rigidity of the hood front part M1.

  If this vehicle hood structure is used, when the head of a tall person collides with the rear part M2 of the hood with respect to a short person, the tall person is higher than the short person. Although the impact energy is increased by the moment of inertia, since the rigidity of the rear portion M2 of the hood is high, it is possible to obtain a sufficient amount of energy absorption and at the same time reduce the amount of dents below the hood.

  For example, when the part below the head of the pedestrian and the front end of the vehicle come into contact with each other, the pedestrian head falls over the front hood 2 disposed in the front part of the vehicle with the contacted part as the center. When the height of the front end of the vehicle is the same, if the height of the pedestrian in contact is high, the length to the portion in contact with the pedestrian head is long, so that a large moment of inertia is applied to the pedestrian head. Conversely, when the height of the pedestrian is low, the moment of inertia becomes small. That is, since the load input to the front hood 2 is larger in the hood rear part M2 than in the hood front part M1, the hood downward deformation increases. However, according to the present embodiment, since the rigidity of the hood rear part M2 is higher than the rigidity of the hood front part M1, the above problem can be solved.

  Further, in this vehicle hood structure, as shown in FIG. 9, since the rigidity of the hood rear part M2 is higher than the rigidity of the hood front part M1, a load is input to the vehicle body 3 from the vehicle front FR toward the vehicle rear RR. The hood bends near the center of the hood where there is a difference in rigidity. As a result, the front hood 2 is not stretched and pushed into the windshield 13, and adverse effects such as a reduction in the crushing stroke of the engine room 1 portion can be eliminated.

  In addition, as a means for increasing the rigidity of the hood rear part M2 to be higher than the rigidity of the hood front part M1, for example, as shown in FIG. 10, the load transmission part 8B provided in the vehicle rear RR is used to increase the rigidity from the hood frame part rear part 6B. The load transmission unit 14 is connected.

  In the example of FIG. 10 (A), a plurality of joints 9 are intermittently formed at arbitrary intervals so as to incline from the both ends of the rearmost load transmitting portion 8B toward the rear side of the hood frame portion 6B. As a result, the rigidity-enhancing load transmitting portion 14 is continuous and substantially linear.

  In the example of FIG. 10B, the rigidity-enhancing load transmitting portion 14 of FIG. 10A is not tilted but has an arc shape. In FIG. 10C, the rigidity enhancing load transmitting portion 14 extends linearly from the rearmost load transmitting portion 8B to the vehicle rear RR and is connected to the rear hood skeleton portion 6B.

  According to the vehicle hood structure shown in FIG. 10, the head can be protected against a tall person due to the high rigidity of the hood rear part M2 as well as the hood structure of FIG. The amount of the downward dent can be reduced, and the hood can be bent near the center of the hood.

FIG. 1 is a cross-sectional view of the vehicle hood structure of the present embodiment when attached to a vehicle body. FIG. 2 is an exploded perspective view of the vehicle hood structure of the present embodiment. FIG. 3 is a plan view of the inner panel of FIG. 4A is a cross-sectional view taken along line AA in FIG. 3, FIG. 4B is a cross-sectional view taken along line BB in FIG. 3, and FIG. 4C is a cross-sectional view taken along line CC in FIG. 5 is a cross-sectional view taken along the line DD of FIG. FIG. 6 is a diagram showing a simplified load transmission path in the vehicle hood structure of the present embodiment. FIG. 7 is a simplified view of the load transmission path when the load transmission portion is formed in the vehicle longitudinal direction. FIG. 8 is a plan view of the inner panel in which the rigidity at the rear of the vehicle is higher than that at the front of the vehicle. FIG. 9 is a view showing a state in which a load is input from the front of the vehicle to the vehicle hood structure using the inner panel of FIG. FIG. 10 is a view schematically showing an example in which a rigidity enhancing load transmitting portion is connected to the rear portion of the hood skeleton portion to increase the hood rigidity at the rear of the vehicle from the front of the vehicle.

Explanation of symbols

1. Engine room 2. Front hood (vehicle hood)
DESCRIPTION OF SYMBOLS 3 ... Vehicle body 4 ... Outer panel 5 ... Inner panel 6 ... Hood frame | skeleton part 6A ... Hood frame | skeleton part front part 6B ... Hood skeleton part rear part 6C, 6D ... Hood frame | skeleton part side part 7 ... Bead part 8 ... Load transmission part 9 ... Joining Part 11 ... Hinge part 12 ... Food lock device 14 ... Rigidity-enhancing load transmission part

Claims (7)

The outer panel and the inner panel constituting the vehicle hood are partially joined up and down to form a closed cross section and the hood skeleton is configured along the outer periphery of the hood.
The outer panel and the inner panel of the inner part surrounded by the hood skeleton part are joined so as to be substantially linear to form a load transmission part extending in the vehicle width direction, and the load transmission part is connected to the hood skeleton. A hood structure for a vehicle characterized by being connected to a section. The vehicle hood structure according to claim 1,
A plurality of examples of the load transmitting portion are provided at an arbitrary interval in the vehicle front-rear direction. The vehicle hood structure according to claim 1 or 2,
The load transmission portion is formed into a continuous substantially linear shape by intermittently forming a plurality of joint portions in which the outer panel and the inner panel are partially joined up and down at an arbitrary interval in the vehicle width direction. A vehicle hood structure characterized by that. The vehicle hood structure according to claim 3,
The vehicular hood structure characterized in that the interval between the joint portions of the load transmission portion provided at the rear of the vehicle is narrower than the interval between the junction portions of the load transmission portion provided at the front of the vehicle hood. The vehicle hood structure according to claim 4,
A vehicle hood structure characterized in that a rigidity-enhancing load transmission portion is connected from the load transmission portion provided at the rear of the vehicle hood to the rear portion of the hood skeleton. The vehicle hood structure according to any one of claims 2 to 5,
A hood structure for a vehicle, wherein a bead portion extending in the vehicle width direction and projecting downward is provided between the load transmission portions provided in the plurality of examples. The vehicle hood structure according to any one of claims 1 to 6,
A hood structure for a vehicle, wherein a hood skeleton front portion and a hood skeleton rear portion of the vehicle hood are respectively supported by a vehicle body.

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