JP2015058815A - Vehicle hood structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle hood structure capable of improving the surface rigidity of a front end part of a hood outer panel in a front end part region of an internal space of a hood.SOLUTION: A vehicle hood structure includes: a hood outer panel 12; a hood inner panel 14; an internal space 16 formed between the panels 12, 14; a hood lock striker 18 provided at the hood inner panel 14; a hood lock reinforcement 20 provided at the internal space 16 side of the hood inner panel 14; and a dent reinforcement 22 provided between the hood outer panel 12 and the hood lock reinforcement 20. A reinforcement part 28 which improves the surface rigidity of a front end part of the hood outer panel 12 is provided at a front end part region 16a formed at a front end part of the internal space 16.

Description

  The present invention relates to a hood structure for a vehicle such as an automobile.

A conventional example of a vehicle hood structure will be described. FIG. 4 is a cross-sectional view showing a vehicle hood structure. In the figure, Fr indicates the front of the vehicle, and Up indicates the upper side of the vehicle.
As shown in FIG. 4, the vehicle hood structure includes a hood outer panel 112 that forms the outer surface side of the hood 110 and a hood inner panel 114 that forms the inner surface side of the hood 110. An internal space 116 is formed between the hood outer panel 112 and the hood inner panel 114. A hood lock striker 118 is provided on the hood inner panel 114. Further, a hood lock reinforcement 120 for reinforcing the peripheral portion of the hood lock striker 118 is provided on the inner space 116 side of the hood inner panel 114. Between the hood outer panel 112 and the hood lock reinforcement 120, a dentin reinforcement 122 that increases the surface rigidity of the hood outer panel 112 is provided. The dental reinforcement 122 and the hood outer panel 112 are bonded, that is, joined by a mastic 126. A front end region 116 a is formed at the front end of the internal space 116 of the hood 110, and is divided by joining the hood lock reinforcement 120 and the dent reinforcement 122. A molding 132 is attached to the front end of the hood outer panel 112. The dental reinforcement 122 is disposed on the rear side near the parting between the hood outer panel 112 and the molding 132. Moreover, the food structure similar to a prior art example is described in patent document 1, for example.

JP 2009-184430 A

In the conventional example, the hood lock striker 118 may be arranged behind the hood lock striker of a general vehicle by design. In such a case, the front end region 116a of the internal space 116 of the hood 110 is enlarged in the front-rear direction (left-right direction in FIG. 4). FIG. 4 shows the front end region 116a enlarged in the front-rear direction.
If it does so, the problem of causing the fall of the surface rigidity of the front-end part of the hood outer panel 112 in the front-end part area | region 116a of the internal space 116 will be caused. In a typical vehicle, the hood lock striker 118 is disposed near the front end of the hood 110, and the front end region 116a of the internal space 116 of the hood 110 is short in the front-rear direction. Even in such a case, it may be required to increase the surface rigidity of the front end portion of the hood outer panel 112 in the front end portion region 116 a of the internal space 116 of the hood 110.
Further, as a measure for increasing the surface rigidity of the front end portion of the hood outer panel 112 in the front end portion region 116a of the internal space 116, for example, increasing the thickness of the molding 132 can be considered. However, since the design of the mall 132 is impaired, sufficient measures cannot be taken.

  The problem to be solved by the present invention is to provide a vehicle hood structure that can increase the surface rigidity of the front end portion of the hood outer panel in the front end region of the internal space of the hood.

The first invention includes a hood outer panel that forms the outer surface side of the hood, a hood inner panel that forms the inner surface side of the hood, an internal space formed between the hood outer panel and the hood inner panel, and a hood inner panel. The hood lock striker provided on the inner space side of the hood inner panel. A hood structure for a vehicle having a dent relief for increasing rigidity and having a front end region divided by joining a hood lock reinforcement and a dent reinforce at the front end of the internal space of the hood, A hood on the front end area of the interior space of the hood Reinforcing member is provided to increase the surface rigidity of the front end portion of the outer panel.
According to this configuration, the surface rigidity of the front end portion of the hood outer panel in the front end region can be increased by the reinforcing member provided in the front end region of the internal space of the hood.

In a second aspect based on the first aspect, the reinforcing member is extended from the dent reinforcement or the hood lock reinforcement, and the tip of the reinforcing member is joined to the hood outer panel.
According to this structure, the surface rigidity of the front-end part of a hood outer panel can be improved with the reinforcement member extended from the den reinforcement and the front-end | tip part was joined to the hood outer panel.

In a third aspect based on the first aspect, the reinforcing member is provided between the hood inner panel and the hood outer panel.
According to this configuration, the surface rigidity of the front end portion of the hood outer panel can be increased by the reinforcing member provided between the hood inner panel and the hood outer panel.

According to a fourth aspect of the present invention, in any one of the first to third aspects, when the reinforcing member is joined to the hood outer panel by welding, a molding is provided at the front end portion of the hood outer panel so as to conceal the welding trace due to welding. Yes.
According to this structure, the welding mark by welding of the reinforcement member in a hood outer panel can be concealed by the molding provided in the front end part of the hood outer panel.

It is sectional drawing which shows the hood structure for vehicles concerning Embodiment 1. FIG. It is sectional drawing which shows the hood structure for vehicles concerning Embodiment 2. FIG. It is sectional drawing which shows the hood structure for vehicles concerning Embodiment 3. FIG. It is sectional drawing which shows the hood structure for vehicles concerning a prior art example.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[Embodiment 1]
Embodiment 1 will be described. FIG. 1 is a cross-sectional view showing a vehicle hood structure. In the figure, Fr indicates the front of the vehicle, and Up indicates the upper side of the vehicle. FIG. 1 shows a front portion which is a main portion of the hood.
As shown in FIG. 1, a hood 10 in a vehicle hood structure covers an upper opening of an engine compartment (engine room) of a vehicle (not shown) so as to be openable and closable. It is connected so that rotation is possible and the front-end part is opened upwards.

  The hood 10 includes a hood outer panel 12 that forms the outer surface side of the hood 10, and a hood inner panel 14 that forms the inner surface side of the hood 10. An internal space 16 is formed between the hood outer panel 12 and the hood inner panel 14. The internal space 16 is formed in a flat shape in the vertical direction. The front edge 12a of the hood outer panel 12 and the front edge 14a of the hood inner panel 14 are in contact with each other in a surface contact manner. Although not shown, the peripheral edge portion of the hood outer panel 12 excluding the front edge portion 12a and the peripheral edge portion of the hood inner panel 14 excluding the front edge portion 14a are joined by hemming or the like. Further, the front edge portion 12a of the hood outer panel 12 and the front edge portion 14a of the hood inner panel 14 may be joined by hemming, welding, or the like.

The hood outer panel 12 includes a main plate portion 12b, a vertical wall portion 12c extending downward from the front end of the main plate portion 12b, a horizontal wall portion 12d extending forward from the lower end of the vertical wall portion 12c, and a horizontal wall portion 12d. And an inclined wall portion 12e extending obliquely forward and downward from the front end. The front edge portion 12a of the inclined wall portion 12e is a front edge portion 12a.
Further, the hood inner panel 14 includes a front edge portion 14a corresponding to the front edge portion 12a of the hood outer panel 12, a front inclined wall portion 14b extending obliquely downward and rearward from the rear end of the front edge portion 14a, A horizontal wall portion 14c extending rearward from the rear end of the front inclined wall portion 14b, and a rear inclined wall portion 14d extending rearward and obliquely upward from the rear end of the horizontal wall portion 14c; have.

  An upper end portion of the hood lock striker 18 is attached to the rear portion of the horizontal wall portion 14 c of the hood inner panel 14. The hood lock striker 18 is disposed at the center in the vehicle width direction (the front and back direction in FIG. 1). Although not shown, the vehicle body side member is provided with a hood lock device. When the hood 10 is closed, the hood lock striker 18 is locked so as to be unlockable by the hood lock device, whereby the hood 10 is held in the closed state.

  A hood lock reinforcement 20 that reinforces the periphery of the hood lock striker 18 is provided on the inner space 16 side of the hood inner panel 14. The hood lock reinforcement 20 is made of a panel material having a U-shaped cross section when viewed in the vehicle width direction, and has a horizontal lower wall portion 20a and a front inclined shape extending obliquely forward and upward from the front end of the lower wall portion 20a. A wall 20b, a front joint 20c extending forward from the front end of the front inclined wall 20b, and a rear inclined wall extending rearward and obliquely upward from the rear end of the lower wall 20a. 20d, and a rear joint 20e extending rearward from the rear end of the rear inclined wall 20d. The lower wall portion 20a of the hood lock reinforcement 20 is disposed in a stacked manner on the rear portion of the horizontal wall portion 14c of the hood inner panel 14. A lower wall portion 20a of the hood lock reinforcement 20 is fastened to the horizontal wall portion 14c of the hood inner panel 14 together with a hood lock striker 18 by bolts (not shown).

  Between the hood outer panel 12 and the hood lock reinforcement 20, a dentin reinforcement 22 that increases the surface rigidity of the hood outer panel 12 is provided. The dental reinforcement 22 is made of a long panel material extending in the vehicle width direction. The dental reinforcement 22 is formed in an inverted U-shaped cross section when viewed from the vehicle width direction, and has a horizontal upper wall portion 22a and a front inclined wall portion extending obliquely forward and downward from the front end of the upper wall portion 22a. 22b, a front joint portion 22c extending forward from the front end of the front inclined wall portion 22b, and a rear inclined wall portion 22d extending obliquely rearward and downward from the rear end of the upper wall portion 22a. And a rear joint portion 22e extending rearward from the rear end of the rear inclined wall portion 22d.

  The front joint 22c of the dentin reinforcement 22 is in contact with the front joint 20c of the hood lock reinforcement 20. Both the joint portions 20c and 22c are joined by welding, for example, spot welding 24 (see “x” marks indicating hit points). Further, a rear joint 22e of the dent reinforcement 22 is brought into contact with a rear joint 20e of the hood lock reinforcement 20. Both the joint portions 20e and 22e are joined by welding, for example, spot welding 25 (see “x” marks indicating hit points). The front joint 20c of the hood lock reinforcement 20 and the front joint 22c of the dental reinforcement 22 are joined to the front side of the vehicle with respect to the hood lock striker 18. Thereby, the hood lock reinforcement 20 and the dentin reinforcement 22 are formed in a hollow closed cross-sectional shape. The spot welds 24 and 25 are applied to a plurality of locations in the vehicle width direction.

  On the upper wall portion 22a of the dentin reinforcement 22, the main plate portion 12b of the hood outer panel 12 is disposed in a stacked manner. The upper wall portion 22a and the main plate portion 12b are bonded, that is, joined by a mastic 26. The mastic 26 is disposed, for example, at two places in the front and rear. The mastic 26 corresponds to “joining means” and “adhesion means” in this specification.

  A front end region 16 a divided by a front inclined wall portion 20 b of the hood lock reinforcement 20 and a front inclined wall portion 22 b of the dentin reinforcement 22 is formed at the front end portion of the internal space 16 of the hood 10. Further, the hood lock striker 18 is disposed rearward compared to a hood lock striker of a general vehicle, and the front end region 16a of the internal space 16 of the hood 10 is enlarged in the front-rear direction.

  The front end region 16a of the internal component space 16 is provided with a reinforcing portion 28 as a reinforcing member that increases the surface rigidity of the front end portion of the hood outer panel 12. The reinforcing portion 28 is integrally formed with the dental reinforcement 22. That is, the reinforcing portion 28 includes a reinforcing wall portion 28a that extends obliquely upward and forward from the front end of the joint portion 22c on the front side of the dental reinforcement 22, and a flange portion 28b that extends forward from the tip of the reinforcing wall portion 28a. have. The flange portion 28 b of the reinforcing portion 28 is in contact with the lower side of the lateral wall portion 12 d of the hood outer panel 12. The flange portion 28b and the lateral wall portion 12d are joined by welding, for example, spot welding 30 (see “x” mark indicating a hit point). The spot welding 30 is applied to a plurality of locations in the vehicle width direction.

  A molding 32 is attached to the front end of the hood outer panel 12. The molding 32 is a long plate-shaped decorative member that extends in the vehicle width direction and is made of a resin molded product. The molding 32 is formed so as to cover the outer peripheral portion of the vertical wall portion 12c, the horizontal wall portion 12d, and the inclined wall portion 12e of the hood outer panel 12. The molding 32 has a bolt mounting portion 33 on the back side. A plurality of bolt mounting portions 33 are arranged in the vehicle width direction. The head of the bolt 34 is fixed to the bolt mounting portion 33. The bolt 34 is inserted into a bolt insertion hole (reference numeral omitted) formed in the inclined wall portion 12 e of the hood outer panel 12. A nut 38 is fastened to the bolt 34. Thereby, the molding 32 is fastened to the hood outer panel 12. The molding 32 conceals the welding marks caused by the spot welding 30. The bolts 34 are provided at a plurality of locations in the vehicle width direction. A clip (not shown) for engaging the molding 32 with the hood outer panel 12 is disposed between the adjacent bolts 34. Further, the dental reinforcement 22 is arranged on the rear side near the parting between the hood outer panel 12 and the molding 32.

  According to the vehicle hood structure described above, the reinforcing portion 28 provided in the front end region 16a of the internal space 16 of the hood 10 can increase the surface rigidity of the front end portion of the hood outer panel 12 in the front end region 16a.

  Further, the surface rigidity of the front end portion of the hood outer panel 12 can be increased by the reinforcing portion 28 that extends from the dentin reinforcement 22 and is joined to the front end portion of the hood outer panel 12, that is, the lateral wall portion 12d. it can.

  Further, unlike the conventional example, since it is not necessary to take measures to increase the thickness of the molding 32, the degree of freedom of the design of the molding 32 can be improved.

  Further, in the pedestrian protection test, the impactor 40 collides with the front end portion of the hood 10, specifically the upper portion of the molding 32, and a certain external force (see arrow F in FIG. 1) acts on the hood 10. In this case, a load based on the external force is transmitted from the hood outer panel 12 to the reinforcing portion 28 of the dentin reinforcement 22 in the front end region 16a of the hood 10 so that the external force (collision energy) can be absorbed.

  Moreover, the rigidity of the reinforcement part 28 is reduced by drilling the reinforcement wall part 28a of the reinforcement part 28 of the dentin reinforcement 22, or the reinforcement part 28 is formed by forming a bead on the reinforcement wall part 28a of the reinforcement part 28. The rigidity of the reinforcing wall portion 28a can be adjusted by improving the rigidity. Accordingly, the collision energy absorption stroke can be adjusted, and the collision energy absorption performance can be improved without impairing the design of the hood 10.

  Further, the molding 32 provided at the front end portion of the hood outer panel 12 can conceal the welding traces due to the spot welding 30 of the reinforcing portion 28 in the hood outer panel 12.

  In addition, when the impactor collides on the dentin reinforcement 22 as compared with the case where the upper wall portion 22a of the dentry reinforcement 22 and the main plate portion 12b of the hood outer panel 12 are bonded or joined together by the mastic 26, welding. The collision energy absorption stroke corresponding to the thickness of the mastic 26 can be made long, and the timing for applying the collision load to the dentin reinforcement 22 can be delayed. The upper wall portion 22a of the dentin reinforcement 22 and the main plate portion 12b of the hood outer panel 12 may be joined by welding, for example, spot welding, instead of the mastic 26.

[Embodiment 2]
A second embodiment will be described. Since the embodiments after this embodiment are modifications to the first embodiment, the changed portions will be described, and overlapping descriptions will be omitted. FIG. 2 is a cross-sectional view showing the vehicle hood structure.
As shown in FIG. 2, in this embodiment, the molding 32 of the first embodiment (see FIG. 1) is omitted. Therefore, instead of the vertical wall portion 12c, the horizontal wall portion 12d, and the inclined wall portion 12e (excluding the front edge portion 12a) of the hood outer panel 12 of the first embodiment, a convexity that gently connects the main plate portion 12b and the front edge portion 12a. A circular arc-shaped wall portion 12f having a circular arc shape is formed. Further, the flange portion 28b of the reinforcing portion 28 of the dentin reinforcement 22 and the arc-shaped wall portion 12f of the hood outer panel 12 are bonded, that is, joined by a mastic 42 instead of the spot weld 30 (see FIG. 1) of the first embodiment. ing. According to this embodiment, since the welding trace by joining of the reinforcement part 28 of the dentin reinforcement 22 does not arise in the hood outer panel 12, the molding 32 can be omitted.

[Embodiment 3]
A third embodiment will be described. In the present embodiment, the embodiment is a modification of the second embodiment. FIG. 3 is a cross-sectional view showing a vehicle hood structure.
As shown in FIG. 3, in this embodiment, the reinforcement part 28 of the dentin reinforcement 22 of Embodiment 1 (refer FIG. 1) is abbreviate | omitted. Instead, a bracket 44 is provided between the hood inner panel 14 and the hood outer panel 12. The bracket 44 is made of a long panel material extending in the vehicle width direction. The bracket 44 has an inverted U-shaped cross section when viewed from the vehicle width direction, and includes an upper wall portion 44a, a front reinforcing wall portion 44b extending downward from the front end of the upper wall portion 44a, and a front reinforcing wall. The front joint 44c extending forward from the lower end of the portion 44b, the rear reinforcing wall 44d extending downward from the rear end of the upper wall 44a, and the lower end of the rear reinforcing wall 44d And a rear joint portion 44e extending rearward.

  The joint portion 44c on the front side of the bracket 44 is in contact with the horizontal wall portion 14c of the hood inner panel 14. The joint portion 44c and the horizontal wall portion 14c are joined by welding, for example, spot welding 46 (see “x” mark indicating a hit point). Further, the joint portion 44e on the rear side of the bracket 44 is in contact with the horizontal wall portion 14c of the hood inner panel 14. The joint portion 44e and the horizontal wall portion 14c are joined by welding, for example, spot welding 47 (see “x” indicating a hit point). Note that the spot welds 46 and 47 are provided at a plurality of locations in the vehicle width direction.

Further, on the upper wall portion 44a of the bracket 44, an arc-shaped wall portion 12f (specifically, a wall portion near the main plate portion 12b) of the hood outer panel 12 is abutted. The upper wall portion 44 a and the arc-shaped wall portion 12 f are bonded, that is, joined by a mastic 48. The joining position of the upper wall portion 44 a and the arcuate wall portion 12 f is disposed on the front side of the joining portion 20 c on the front side of the hood lock reinforcement 20 and the joining portion 22 c on the front side of the dental reinforcement 22. The bracket 44 corresponds to a “reinforcing member” in this specification.
According to the present embodiment, the bracket 44 provided between the hood inner panel 14 and the hood outer panel 12 can enhance the surface rigidity of the front end portion of the hood outer panel 12.

[Other technical matters]
The present invention is not limited to the above-described embodiment, and modifications can be made without departing from the gist of the present invention. For example, the reinforcing portion 28 of the dentin reinforcement 22 may be integrally formed with the dentin reinforcement 22 instead of being integrally formed with the dentin reinforcement 22. Further, the reinforcing portion 28 may be formed by extending the front end of the joint portion 20 c on the front side of the hood lock reinforcement 20. The bracket 44 may be disposed upside down. In addition, the bracket 44 may be formed in a plate shape in which any one of the front reinforcing wall portion 44b and the rear reinforcing wall portion 44d is omitted. Further, the bracket 44 and the hood inner panel 14 may be joined by welding, for example, spot welding, instead of the mastic 48. In this case, it is preferable to provide a molding for concealing the welding marks at the front end of the hood outer panel 12. Further, a molding may be provided in the case where no welding mark is generated at the front end portion of the hood outer panel 12.

DESCRIPTION OF SYMBOLS 10 ... Hood 12 ... Hood outer panel 14 ... Hood inner panel 16 ... Inner space 16a ... Front end area 18 ... Hood lock striker 20 ... Hood lock reinforcement 22 ... Dental reinforcement 28 ... Reinforcement part (reinforcement member)
32 ... Mole 44 ... Bracket (reinforcing member)

Claims (4)

A hood outer panel forming the outer surface side of the hood;
A hood inner panel forming the inner surface side of the hood;
An internal space formed between the hood outer panel and the hood inner panel;
A food lock striker provided on the food inner panel;
A hood lock reinforcement provided on the inner space side of the hood inner panel and reinforcing the periphery of the hood lock striker;
Dentry reinforcement provided between the hood outer panel and the hood lock reinforcement, which increases the surface rigidity of the hood outer panel,
A front hood region formed by joining the hood lock reinforcement and the dent reinforcement is formed at the front end of the internal space of the hood.
A hood structure for a vehicle, wherein a reinforcing member for increasing the surface rigidity of the front end portion of the hood outer panel is provided in a front end region of the internal space of the hood. The vehicle hood structure according to claim 1,
The vehicle hood structure, wherein the reinforcing member extends from the dent reinforcement or the hood lock reinforcement, and a front end portion of the reinforcing member is joined to the hood outer panel. The vehicle hood structure according to claim 1,
The vehicle hood structure, wherein the reinforcing member is provided between the hood inner panel and the hood outer panel. The vehicle hood structure according to any one of claims 1 to 3,
A vehicular hood structure characterized in that when the reinforcing member is joined to the hood outer panel by welding, a molding is provided at a front end portion of the hood outer panel so as to conceal the welding marks due to the welding.

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