JP2009040168A - Vehicle hood structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle hood structure for securing tension rigidity of a striker upper area, while securing pedestrian protective performance. <P>SOLUTION: A hood dent reinforcement panel 50 has an abutting part 51 abutting on a reverse surface of a hood outer panel 10, and a wall part 52 extended toward a reverse surface of a hood inner panel 20 from the front end of this abutting part 51. The wall part 52 has a folding part 52A for a chance of folding of a bottom folding shape. The folding part is formed of a fold line, and this fold line is arranged by being further dislocated to the vehicle rear side than the lower end and the upper end of the wall part 52. The fold line is intermittently arranged in the vehicle width direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hood structure of a vehicle, and more particularly to a hood structure that can ensure pedestrian protection performance even if a hood den reinforcement panel is provided.

FIG. 4 is a cross-sectional view showing a conventional automobile hood structure 100. In the drawing, Fr indicates the front of the vehicle, and Up indicates the upper side of the vehicle.
The hood structure 100 includes a hood outer panel 110, a hood inner panel 120 disposed below the hood outer panel 110 at a distance, a striker 130 projecting downward from a front portion of the hood inner panel 120, A hood lock reinforcement panel 140 that reinforces the front portion of the hood to which the striker 130 is attached and a hood den reinforcement panel 150 that reinforces the rigidity of the hood outer panel 110 above the striker 130, that is, the dent property.

  In the illustrated hood structure 100, the central region of the hood outer panel 110 constituting the outer surface of the vehicle body is set at a high position. For this reason, the front region of the hood outer panel 110 is configured by the steeply inclined portion 111, and the central region is formed by the gently inclined portion 112 extending from the upper end 111A of the steeply inclined portion 111 to the rear of the vehicle. For example, the hood outer panel 110 is configured such that the upper end 111A of the steeply inclined portion 111 is disposed at a position where the wrap around distance (WAD) is 1000 mm.

In this type of hood structure 100, the hood inner panel 120 extends horizontally from the lower end of the steeply inclined portion 111 to the rear of the vehicle at the front portion of the hood, so that the hood inner panel around the striker 130 is disposed. The distance D between the panel surface and the hood outer panel surface above the striker 130 is widened.
For this reason, in order to ensure the dent property of the hood outer panel surface above the striker, the hood den reinforcement panel 150 includes a contact portion 151 that contacts the back surface of the hood outer panel 110 and a hood from the front end of the contact portion 151. And a wall 152 extending toward the back surface of the inner panel 120. The rear part of the contact part 151 extends from the rear part of the hood lock reinforcement panel 140 provided between the hood outer panel 110 and the hood inner panel 120, that is, from the back side of the hood inner panel 120 to the back side of the hood outer panel 110. It is joined to the upper part of the inclined part 141 that has come out.

  According to such a configuration, even if the hood outer panel 110 is pushed to the inner panel 120 side by hand, since the hood outer panel 110 is supported by the hood dental reinforcement panel 150, it is not easily recessed. . Therefore, for example, the hood is prevented from being deformed by a load applied when the user waxes the hood, and a good design of the hood is ensured.

A hood structure provided with such a hood dental reinforcement panel is disclosed in Patent Document 1.
JP 2007-30893 A

  However, since the conventional hood structure 100 shown in FIG. 4 includes a wall portion 152 that stands vertically at the front portion of the hood, the collision object Y collides with the hood outer panel surface above the wall portion 152. In this case, the wall portion 152 prevents the contact portion 151 of the hood outer panel 110 and the hood dental reinforcement panel 150 from moving toward the hood inner panel 120 side. There is a possibility that the absorption stroke is reduced and the pedestrian protection performance is reduced.

Further, in the hood structure 100A of FIG. 5 in which the wall portion 152 is omitted and the coupling position of the hood lock reinforcement panel 140A and the hood dental reinforcement panel 150A is set upward, the hood lock reinforcement panel 140A is a hood inner panel. The second inclined portion 142 extending from the back surface of the 120 to the back surface of the hood outer panel 110 is provided, and the upper end of the second inclined portion 142 is joined to the front end of the contact portion 151 of the hood dental reinforcement panel 150A. . However, due to molding restrictions of the hood lock reinforcement panel 140A, the second inclined portion 142 has an upper end 142B that joins the front end of the contact portion 151 on the front side of the lower end 142A that contacts the back surface of the hood inner panel 120. Inclined to be configured. For this reason, when the collision object Y collides with the hood outer panel surface above the striker, the second inclined portion 142 tends to tilt toward the inclined side, that is, forward of the hood. Since there is no gap through which the second inclined portion 142 can move sufficiently, the second inclined portion itself cannot be sufficiently deformed, and there is a possibility that the crushing remains.
Furthermore, the hood lock reinforcement panel 140A is hard to be deformed because it is thicker than the hood dental reinforcement panel 150A. For this reason, there exists a possibility that the said 2nd inclination part itself may prevent the deformation | transformation movement of the hood outer panel 110 to the hood inner panel 120 side.

  The present invention was created to solve the above-described problems, and an object of the present invention is to provide a vehicle hood structure that secures the tension rigidity in the area above the striker while ensuring pedestrian protection performance.

In order to achieve the above object, the present invention includes a hood outer panel that constitutes a vehicle body outer surface, a hood inner panel that is disposed below the hood outer panel and has a peripheral edge joined to the peripheral edge of the hood outer panel, and a hood front part. A hood dent in an automobile hood structure comprising a striker provided on the lower surface of the hood and a hood den reinforcement panel that is in contact with the back surface of the hood outer panel above the striker and reinforces the rigidity of the hood outer panel. The reinforcement panel includes a contact portion that hits the back surface of the hood outer panel, and a wall portion that extends from the front end of the contact portion toward the back surface of the hood inner panel, and the wall portion has a folded portion. It is a feature.
In the vehicle hood structure of the present invention, preferably, the fold portion is formed of a fold line, and this fold line is valley-folded so as to be shifted from the lower end and the upper end of the wall portion toward the vehicle rear side. It is desirable that the fold line be provided intermittently in the vehicle width direction by having a plurality of openings formed in the region where the wall portion extends vertically above the fold portion in the vehicle width direction. Further, preferably, the wall portion includes a bead extending in the vehicle vertical direction. In addition, a wall part is arrange | positioned under the food | hood outer panel area | region whose wrap around distance is 1000 mm-1350 mm, for example.

  According to the present invention, when a colliding object collides with the hood outer panel surface above the striker, the wall portion is further bent in the valley folding direction by the load, so that the stroke in which the hood outer panel and the hood dental reinforcement panel move is increased. The impact energy can be absorbed by the deformation of the panel member as it moves. Thereby, the impact with respect to a colliding object can be reduced. Therefore, the present invention can achieve both pedestrian protection performance and tension rigidity in the area above the striker.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the figure, symbol Fr indicates the front of the vehicle, Up indicates the upper side of the vehicle, and LH indicates the left side in the vehicle width direction.
FIG. 1 is a cross-sectional view of a hood structure 1 according to an embodiment of the present invention, and FIG. 2 is a perspective view of the hood structure 1 with the hood outer panel 10 omitted. FIG. 1 shows a cross section at an intermediate position in the vehicle width direction.

  The hood structure 1 includes a hood outer panel 10 that constitutes an outer surface of the vehicle body, a hood inner panel 20 that is disposed below the hood outer panel 10 and has a peripheral edge joined to the peripheral edge of the hood outer panel 10, and a lower surface of the hood front part. A striker 30 provided on the hood, a hood lock reinforcement panel 40 provided between the hood outer panel 10 and the hood inner panel 20 to reinforce the front portion of the hood, and a back surface of the hood outer panel 10 above the striker 30. A hood dental reinforcement panel 50 that contacts and reinforces the rigidity of the hood outer panel 10.

  The hood outer panel 10 and the hood inner panel 20 are joined to each other by welding or the like at the periphery so that a space S is defined inside. In this space S, a hood lock reinforcement panel 40 and a hood dental reinforcement panel 50 are arranged.

  Furthermore, the hood structure 1 according to the present embodiment is characterized in that the central region of the hood outer panel 10 constituting the vehicle body outer surface is set at a high position. For this reason, the front region of the hood outer panel 10 is configured by a steeply inclined portion 11 having a gradient larger than the gradient of the hood central region. The central portion is formed by the inclined portion 12. For example, the hood outer panel 10 is configured such that the upper end 11A of the steeply inclined portion 11 is disposed at a position where the wrap around distance (WAD) is 1000 mm to 1350 mm.

  The hood inner panel 20 has a second gentle slope that slopes upward with a gentle slope from the lower end of the steep slope 11 of the hood outer panel 10 toward the rear of the vehicle, that is, a slope gentler than the slope of the steep slope 11 described above. An inclined portion 21, a third gentle inclined portion 22 inclined downward as it goes from the rear end of the second gentle inclined portion 21 to the rear of the vehicle, and an upper portion as it goes from the rear end of the third gentle inclined portion 22 to the rear of the vehicle And a fifth inclined portion 24 inclined with a larger gradient than the fourth inclined portion 23 from the rear end of the fourth inclined portion 23 toward the rear of the vehicle. In addition, the striker 30 is arrange | positioned so that it may hang down from the lower surface in the vehicle width direction center position of the said 4th inclination part 23. FIG. The second gentle slope portion 21 to the fifth slow slope portion 24 are each formed in a panel shape, and they are integrally formed by press molding.

The hood lock reinforcement panel 40 includes a sixth gentle slope 41 that is superimposed on the second gentle slope 21, a seventh gentle slope 42 that extends from the rear end of the sixth gentle slope 41, An eighth gentle slope portion 43 extending from the rear end of the seventh gentle slope portion 42 and overlaid on the aforementioned fourth gentle slope portion 23, and from the rear end of the eighth gentle slope portion 43 to the back side of the hood outer panel 10. And an extended ninth gentle inclined portion 44.
Here, a gap is formed between the ninth gentle inclination portion 44 and the fifth gentle inclination portion 24 so that the ninth gentle inclination portion 44 does not contact the fifth gentle inclination portion 24 of the hood inner panel 20. . The ninth gentle slope portion 44 has a larger slope than the fifth gentle slope portion 24 and slopes upward as it goes to the rear of the vehicle.

The hood den reinforcement panel 50 has a hood outer panel surface above the striker, that is, a contact portion 51 in contact with the back surface of the first gently sloping portion 12, and a front end of the contact portion 51 toward the back surface of the hood inner panel 20. And an extended wall portion 52.
The contact portion 51 is disposed so as to line the hood outer panel 10 via a mastic 60 (see FIG. 2). The rear part of the contact part 51 is joined to the upper part of the ninth gentle slope part 44 described above. Further, the contact portion 51 has a reverse recessed hat-shaped first recess 53 extending in the vehicle width direction from the intermediate position in the front-rear direction to the rear region, and the first recess 53 behind the first recess 53. A second recess 54 formed in the same shape. The upper part of the ninth gentle slope 44 is joined to the bottom of the second recess 54.

Furthermore, in the hood structure 1 according to the present embodiment, the wall portion 52 has a bent portion 52A at a position in the middle of the height, and the first wall portion 52B from the front end of the abutting portion 51 to the bent portion 52A is bent. The second wall portion 52C below the portion 52A, and a flange 52D extending horizontally forward from the lower end of the second wall portion 52C. Further, in the present embodiment, the fold portion 52A is formed of a fold line extending in a line shape in the horizontal direction of the vehicle width (hereinafter, the fold line is denoted by reference numeral 52A), and this fold line 52A is located at the position of the upper end of the first wall portion 52B. The second wall portion 52C is disposed so as to be shifted toward the ninth gentle inclined portion 44 side from the position of the lower end of the two wall portions 52C.
Further, in the contact portion 51 of the present embodiment, as shown in FIG. 2, a plurality of openings 55 that are long in the front-rear direction formed in a region extending from the front side of the first recess 53 to the second wall portion 52 </ b> C in the vehicle width direction. In parallel, the broken line 52A is provided intermittently in the vehicle width direction. A bead 70 extending in the vehicle vertical direction is formed on the second wall 52C on the extension line of the panel portion 51A of the contact portion 51 extending in the front-rear direction adjacent to the opening 55.
The wall portion 52 thus configured is disposed below the hood outer panel region having a wrap around distance of 1000 mm to 1350 mm.

  In the present embodiment, the hood dental reinforcement panel 50 is formed to have a size larger than that of the hood lock reinforcement panel 40, and the flange 52 </ b> D is the sixth gentle slope portion of the hood lock reinforcement panel 40 in the vehicle width direction. Since the width is wider than 41, the flange 52 </ b> D is joined to the sixth gently inclined portion 41 in the vehicle width center region, and the flange 52 </ b> D in the end region shifted from the vehicle width center is directly joined to the back surface of the hood inner panel 20.

  In the hood structure 1 configured as described above, when the collision object X comes into contact with the first gentle inclination portion 12 near the upper end 11A of the steep inclination portion 11 as shown in FIG. 3, the collision object X enters the hood. enter in. During this approach, a load is applied to the hood outer panel 10 and the hood dental reinforcement panel 50 by the collision object X, and when this load is transmitted to the wall 52 of the hood dental reinforcement panel 50, the wall 52 is shaped like a valley. Further bends in the valley fold direction with the fold line 52A. That is, the wall portion 52 is bent so that the second wall portion 52C falls to the ninth gently inclined portion 44 side. Thereby, the hood outer panel 10 and the hood dental reinforcement panel 50 are deformed while moving to the hood inner panel 20 side.

  As described above, according to the hood structure 1 according to the present embodiment, when the collision object X collides with the hood outer panel surface above the striker, the wall 52 is bent by the load, thereby the hood outer panel 10 and the hood dent. The movement stroke of the reinforcement panel can be secured, and the impact energy can be absorbed by the deformation of the panel member as it moves. Thereby, the impact with respect to the collision object X can be reduced.

In the present embodiment, since the second wall portion 52C includes the beads 70 and has high rigidity with respect to the load in the vehicle vertical direction, the first wall portion 52B is configured to be easily bent at the broken line 52A. Thereby, the deformation | transformation of the food outer panel 10 and the food dental reinforcement panel 50 is possible reliably.
Furthermore, since the broken line 52A is intermittently arranged in the vehicle width direction, the wall 52 is bent and deformed as compared with the case where the broken line 52A is formed in a streak shape extending over the entire width of the wall 52. It can be prevented and can be bent reliably.
Further, in the hood structure 1, since the hood outer panel 10 is sufficiently separated from the radiator support 80 (see FIG. 1), which is a hard skeleton member, bottoming and the like can be prevented.

  As described above, the present invention can be implemented in various forms without departing from the spirit of the present invention. For example, the shape of the opening 55 and the number of the beads 70 are not limited to the illustrated example, and the present invention can be configured by omitting the openings 55 and the beads 70. The numerical values in the above description are examples.

It is sectional drawing of the hood structure which concerns on embodiment of this invention. It is a perspective view of the hood structure concerning the embodiment of the present invention. It is sectional drawing for demonstrating the effect | action of the hood structure which concerns on embodiment of this invention. It is sectional drawing which shows the conventional vehicle hood structure. It is sectional drawing which shows the conventional vehicle hood structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hood structure 10 Hood outer panel 11 Steep inclination part 11A Upper end 12 1st gentle inclination part 20 Hood inner panel 21 2nd gentle inclination part 22 3rd gentle inclination part 23 4th gentle inclination part 24 5th gentle inclination part 30 Striker 40 Food Lock Reinforcement Panel 41 6th Slightly Inclined Part 42 7th Slowly Inclined Part 43 8th Slowly Inclined Part 44 9th Slowly Inclined Part 50 Food Density Reinforcement Panel 51 Abutting Part 51A Panel Part 52 Wall Part 52A Folding Line )
52B 1st wall part 52C 2nd wall part 52D Flange 53 1st recessed part 54 2nd recessed part 55 Opening 60 Mastic 70 Bead 80 Radiator support X Colliding object

Claims (5)

A hood outer panel constituting the outer surface of the vehicle body, a hood inner panel disposed below the hood outer panel and having a peripheral edge joined to the peripheral edge of the hood outer panel, a striker provided on the lower surface of the hood front part, In a hood structure of an automobile provided with a hood den reinforcement panel that abuts the back surface of the hood outer panel above the striker and reinforces the rigidity of the hood outer panel.
The hood den reinforcement panel includes a contact portion that contacts the back surface of the hood outer panel, and a wall portion that extends from the front end of the contact portion toward the back surface of the hood inner panel,
The vehicle hood structure, wherein the wall portion has a bent portion.   2. The vehicle hood structure according to claim 1, wherein the fold portion is formed by a fold line, and the fold line is arranged to be displaced from the lower end and the upper end of the wall portion toward the rear side of the vehicle and is valley-folded.   The said wall part has the opening formed in the area | region over the upper and lower sides of the said folding part in the vehicle width direction, The said broken line is provided intermittently in the vehicle width direction, It is characterized by the above-mentioned. Vehicle hood structure.   The vehicle hood structure according to claim 1, wherein the wall portion includes a bead extending in a vehicle vertical direction.   The vehicle hood structure according to any one of claims 1 to 4, wherein the wall portion is disposed below a hood outer panel region having a wrap around distance of 1000 mm to 1350 mm.

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