JP6064170B2 - Hood front structure - Google Patents

Description

  The present invention relates to a hood comprising a hood outer panel constituting an exterior design of a passenger car, a hood inner panel supporting the hood outer panel, and a striker coupled to the hood inner panel and engageable with a hood lock on the body side. It relates to the front structure.

A technique related to the front structure of the hood described above is described in Patent Document 1.
The hood described in Patent Literature 1 is a hood 100 configured to be able to open and close an engine room ER in a sedan type passenger car C as shown in FIG. As shown in FIG. 11 (B), the hood 100 includes a hood outer panel 102, a hood inner panel 104 that supports the hood outer panel 102, and a hood lock (not shown) on the body side connected to the hood inner panel 104. And an engageable striker 106. A fold line 104w extending in the vehicle width direction is formed at the front portion of the hood inner panel 104 positioned in front of the striker 106.
For this reason, as shown in FIG. 11B, when the collision load F is applied to the front portion of the hood 100 from an obliquely upper front (for example, an angle of about 60 °) (see the two-dot chain line), the hood inner panel 104 Is easily bent downward from the position of the folding line 104w. Thereby, the front part of the hood 100 is easily deformed downward by receiving the collision load F, and the collision load F can be absorbed well.

JP2007-076449

  However, in a passenger car such as a minivan or SUV having a higher vehicle height than the sedan type passenger car C, the collision load F may be applied to the front portion of the hood 100 at a shallow angle (for example, an angle of about 20 °). . Since the collision load F at a shallow angle is applied to the hood inner panel 104 along the hood inner panel 104, the hood inner panel 104 is hardly crushed rearward of the vehicle even if the folding line 104w is formed. For this reason, the absorption efficiency of the collision load F in the hood 100 is lowered.

  The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is that the front portion of the hood is disposed even when a collision load is applied at a shallow angle with respect to the front portion of the hood. This is to facilitate deformation in the vehicle rearward direction.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 includes a hood outer panel that constitutes an exterior design of a passenger car, a hood inner panel that supports the hood outer panel, and a striker that is coupled to the hood inner panel and can engage with a hood lock on the body side. A front structure of a hood provided with a bellows part bent up and down at a front part of the hood inner panel positioned in front of the striker, and extending a folding line of the bellows part in a vehicle width direction. The bellows portion is formed in a state of being separated from another bellows portion or a portion other than the bellows portion in the vehicle width direction by an opening formed in the hood inner panel.

According to the present invention, the bellows portion bent up and down is formed on the front portion of the hood inner panel so as to extend in the vehicle width direction in a state in which the folding line of the bellows portion extends in the vehicle width direction. For this reason, even when a collision load is applied at a shallow angle with respect to the front portion of the hood, the hood inner panel is easily crushed in the rearward direction of the vehicle at the position of the bellows portion.
Further, the bellows portion is separated from other bellows portions or portions other than the bellows portion in the vehicle width direction by an opening formed in the hood inner panel. For this reason, when the bellows part is crushed, other bellows parts or parts other than the bellows part do not prevent the bellows part from being crushed.
Here, the bellows part includes not only a case where a plurality of peaks or valleys are formed, but also a case where one peak or valley is formed.

According to invention of Claim 2, the dimension from the ridgeline of the peak of the bellows part to the front neighboring valley bottom line is substantially equal to the dimension from the ridgeline of the mountain to the rear neighboring valley bottom line.
For this reason, the bellows portion of the hood inner panel is more easily crushed in the vehicle front-rear direction.

According to the invention of claim 3, the openings are formed in a slit shape extending in the vehicle front-rear direction, and are provided on both sides of the bellows portion in the vehicle width direction.
For this reason, the bellows part of the hood inner panel and the other part of the hood inner panel are completely separated by the slit-like opening, and the other parts hardly influence the deformation of the bellows part. Moreover, since opening is slit shape, an opening area can be made small and the strength reduction of a hood inner panel can be suppressed.

According to the invention of claim 4, the opening is provided at the position of the ridgeline of the mountain in the bellows part or the position of the valley bottom line, and the bellows part is divided into a plurality in the vehicle width direction.
For this reason, when the bellows part receiving the collision load is deformed, the bellows part not receiving the collision load does not affect the deformation of the bellows part.

The invention according to claim 5 is characterized in that the ridge line and the valley bottom line of the bellows portion extend linearly.
For this reason, the ridgeline of the bellows portion and the valley bottom line are easily bent.
According to the invention of claim 6, the extending direction of the ridge line and the valley bottom line in one bellows part divided into a plurality in the vehicle width direction by the opening intersects with the extending direction of the ridge line and the valley bottom line in the other bellows part. It is characterized by doing.
That is, since the angles of the plurality of bellows portions can be changed, the plurality of bellows portions can be arranged over a wide range in the vehicle width direction along the periphery of the hood inner panel.

  According to the present invention, even when a collision load is applied at a shallow angle with respect to the front portion of the hood, the front portion of the hood is easily crushed in the vehicle front-rear direction.

It is a front perspective view of a passenger car provided with the front structure of the hood concerning Embodiment 1 of the present invention. It is the longitudinal cross-sectional view (II-II arrow directional cross-sectional view of FIG. 1) (A figure) showing the front part structure of the said food | hood, and the detailed figure (B figure) of B part (bellows part) in A figure. It is the perspective view which looked at the front part structure of hood from the upper part. It is the perspective view which looked at the front part structure of the food | hood from the downward direction. It is a schematic plan view showing the front part structure of a hood. It is a longitudinal cross-sectional view showing the function of the front part structure of a hood. It is a longitudinal cross-sectional view showing the function of the front part structure of a hood. It is a longitudinal cross-sectional view showing the function of the front part structure of a hood. It is a top view showing the modification of the front part structure of a hood. It is a top view showing the modification of the front part structure of a hood. It is a perspective view (A figure) showing the front part of a passenger car provided with the front part structure of the conventional hood, and BB arrow sectional drawing (B figure) of A figure.

[Embodiment 1]
Hereinafter, the front structure of the hood according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 10. This embodiment is a front structure of a hood used in a one-box type passenger car having a high vehicle height.
In addition, front and rear, right and left and up and down in the figure represent front and rear, right and left and up and down in the passenger car C.

<About the outline of the passenger car C>
The passenger car C is a one-box type passenger car having a vehicle height higher than that of a sedan-type passenger car, and an engine room ER is provided on the front side of the passenger compartment R. The upper opening of the engine room ER is configured to be opened and closed by the engine hood 10.
The engine hood 10 (hereinafter referred to as the hood 10) is connected to the body of the passenger car C through hinge mechanisms (not shown) on the left and right sides of the rear portion of the hood 10. The hood 10 is configured to open and close the upper opening of the engine room ER by rotating up and down around the hinge mechanism. Further, a striker 45 (see FIG. 2A) is provided at the center of the front end portion of the hood 10, and the striker 45 engages with a hood lock 47 on the body side, so that the hood 10 is in the engine room ER. Locked with the upper opening closed.

<About the front structure of the hood 10>
As shown in FIG. 2A, the hood 10 includes a hood outer panel 16 that constitutes the appearance design of the passenger car C, and a hood inner panel 20 that supports the hood outer panel 16. The hood outer panel 16 is formed so that the tip side is gently curved downward, and an end edge portion 16f of the hood outer panel 16 is folded back inward. The flange portion 20f formed at the end edge of the hood inner panel 20 is fixed inside the end edge portion 16f of the hood outer panel 16 in a fixed state.
The hood inner panel 20 is a panel that reinforces the hood outer panel 16 and supports the hood outer panel 16 from the inside, and the hood inner panel 20 has a flange portion 20f fixed to the end edge portion 16f of the hood outer panel 16 in the hood. A space S is formed between the outer panel 16 and the hood inner panel 20.

As shown in FIGS. 2A and 3, a lock reinforcement 30 is fixed to the hood inner panel 20 at the center of the upper surface of the hood inner panel 20. The lock reinforcement 30 includes a rectangular flat base portion 32 and an inclined portion 34 that is bent upward from the rear end edge of the base portion 32 and is inclined so that the rear becomes higher. And the flange part 34f formed in the upper end edge of the inclination part 34 of the lock reinforcement 30 is supporting the rear part of the hood outer panel 16 from the inner side. A long hole 32h that is long in the vehicle width direction is formed at the center of the base portion 32 of the lock reinforcement 30. And the upper end part of the striker 45 is being fixed to the lower side of the base part 32 of the lock reinforcement 30 as shown to FIG. 2 (A).
As shown in FIG. 4 and the like, the striker 45 is formed in a substantially U shape and is disposed so as to straddle the long hole 32h of the base portion 32 from the front-rear direction, and is constant from the base portion 32 and the hood inner panel 20. Projects downward by the dimension.
Further, as shown in FIG. 3, legs 41 of the dentin reinforcement 40 are connected to the left and right sides of the front end 32 of the lock reinforcement 30, and a flat plate portion of the dentin reinforcement 40 supported by the legs 41. 43, as shown in FIG. 2A, supports the central portion of the hood outer panel 16 from the inside.

As shown in FIGS. 2A and 2B, the flange portion 20 f at the tip edge of the hood inner panel 20 is formed in an inclined state along the hood outer panel 16. The upper end of the flange portion 20f of the hood inner panel 20 is bent downward. On the rear side of the flange portion 20f of the hood inner panel 20, a front inclined surface 22 that is gently inclined so that the rear is lowered is formed. A bellows portion 21 is formed between the front inclined surface 22 of the hood inner panel 20 and the base support surface 25 that supports the base portion 32 of the lock reinforcement 30 as shown in FIGS. .
2 (A) and 2 (B), the bellows portion 21 is a portion formed by bending the hood inner panel 20 up and down in a zigzag manner, and has a triangular ridge line 21r and a ridge line thereof. The front valley bottom line 21v and the rear valley bottom line 21w are provided before and after 21r. A front valley bottom line 21v is disposed at a boundary position between the front inclined surface 22 and the mountain. A rear valley bottom line 21 w is disposed at the boundary position between the mountain and the base support surface 25. And as shown in FIGS. 3-5, the ridgeline 21r of the bellows part 21, the front side valley bottom line 21v, and the rear side valley bottom line 21w are linearly extended in the vehicle width direction. Furthermore, the dimension from the ridge line 21r to the front valley bottom line 21v of the bellows portion 21 and the dimension from the ridge line 21r to the rear valley bottom line 21w are set to substantially equal values.
The hood inner panel 20 has slit-shaped openings 27 extending in the vehicle front-rear direction, as shown in FIGS. 2 to 5, at positions on both sides of the bellows portion 21 in the vehicle width direction.

<About the function of the front structure of the hood 10>
Next, the function of the front structure of the hood 10 will be described with reference to FIGS.
Here, when the passenger car C receives a collision load F from the front, the striker 45 of the hood 10 is engaged with the hood lock 47 on the body side.
As shown in FIG. 6, when the collision load F is applied to the front end of the hood 10 at a shallow angle (an angle of about 20 °) obliquely from the upper front, the hood inner panel 20 extends along the front inclined surface 22. In the state, the collision load F is applied.
Since the bellows portion 21 is formed between the front inclined surface 22 and the base support surface 25 in the hood inner panel 20, the bellows portion 21 is a collision load input along the front inclined surface 22. Upon receiving F, as shown in FIGS. 7 and 8, the vehicle is crushed in the vehicle front-rear direction. That is, the bellows portion 21 is crushed in the vehicle front-rear direction around the mountain ridge line 21r. As a result, even the collision load F applied at a shallow angle with respect to the tip of the hood 10 can be absorbed well.
Further, since slit-like openings 27 are formed on both sides of the bellows portion 21 in the vehicle width direction, when the bellows portion 21 of the hood inner panel 20 is crushed, the hood positioned on the outside in the width direction of the bellows portion 21. The other part of the inner panel 20 does not prevent the bellows 21 from being crushed and deformed.

<Advantages of the front structure of the hood 10 according to this embodiment>
According to the front portion structure of the hood 10 according to the present embodiment, the bellows portion 21 is formed in the front portion of the hood inner panel 20. For this reason, even when the collision load F is applied at a shallow angle with respect to the front portion of the hood 10, the hood inner panel 20 is easily crushed in the vehicle rearward direction at the position of the bellows portion 21.
Further, the bellows portion 21 is separated from a portion other than the bellows portion by a slit-shaped opening 27 formed in the hood inner panel 20 in the vehicle width direction. Therefore, when the bellows portion 21 is crushed, a portion other than the bellows portion However, the crushing deformation of the bellows portion 21 is not hindered.
In addition, since the dimension from the ridge line 21r to the front valley bottom line 21v as the bending center in the bellows part 21 is substantially equal to the dimension from the ridge line 21r to the rear valley bottom line 21w, the bellows part 21 of the hood inner panel 20 is the vehicle. It becomes easier to collapse in the front-rear direction.
Further, since the openings 27 on both sides in the vehicle width direction of the bellows portion 21 are formed in a slit shape, the opening area can be reduced and the strength reduction of the hood inner panel 20 can be suppressed.

<Example of change>
In addition, this invention is not limited to the said embodiment, The change in the range which does not deviate from the summary of this invention is possible. For example, in this embodiment, as shown in FIG. 5, the example which forms the slit-shaped opening 27 in the both sides in the vehicle width direction of the bellows part 21 of the hood inner panel 20 was shown. However, when the length dimension in the vehicle width direction of the ridge line 21r and the valley bottom lines 21v and 21w of the bellows portion 21 is large, the ridge line is located midway between the ridge line 21r and the valley bottom lines 21v and 21w as shown in FIG. It is also possible to form a small opening 27s straddling 21r and valley bottom lines 21v and 21w. As a result, a plurality of bellows portions 21 are formed in the vehicle width direction. As a result, when one bellows portion 21 receiving the collision load F is deformed, the bellows portions 21 located on both sides of the bellows portion 21 (deformed bellows portion 21) prevent the deformation of the deformed bellows portion 21. Absent.
9 shows an example in which all the bellows portions 21 extend in the vehicle width direction in a straight line, but as shown in FIG. 10, the bellows portion 21 at the center in the vehicle width direction (center bellows portion 21). The left and right bellows portions 21 can be inclined with respect to the central bellows portion 21 in accordance with the planar shape of the tip of the hood 10. That is, the bellows portion 21 can be arranged so that the extending direction of the ridge line 21r in the left and right bellows portions 21 intersects the extending direction of the ridge line 21r and the like of the central bellows portion 21. As a result, the bellows portion 21 can be provided also in the portion where the hood 10 is curved in the vehicle width direction, and the collision load F can be absorbed well over a wide range of the hood 10.
It is also possible to omit only the slit-like openings 27 on both sides of the bellows portion 21 in the width direction so that only the small openings 27s are provided.

10 .... Engine hood (hood)
16 .... Hood outer panel 20 ... Hood inner panel 21 ... Bellows 21v ... Front valley bottom line 21r ... Ridge line 21w ... Rear valley bottom line 27s ... Small opening 27 ... Opening 45 ... Strike 47 ... Hood lock F ... Collision load

Claims (6)

A front structure of a hood comprising a hood outer panel constituting an exterior design of a passenger car, a hood inner panel supporting the hood outer panel, and a striker coupled to the hood inner panel and engageable with a hood lock on the body side. There,
The bellows part bent up and down is formed in the front part of the food inner panel located ahead of the striker in a state where the folding line of the bellows part extends in the vehicle width direction,
The front part structure of the hood characterized in that the bellows part is separated from another bellows part or a part other than the bellows part in the vehicle width direction by an opening formed in the hood inner panel. The front structure of the hood according to claim 1,
A front structure of a hood, wherein a dimension from a mountain ridge line to a front neighboring valley bottom line in the bellows part is substantially equal to a dimension from the mountain ridge line to a rear neighboring valley bottom line. The front structure of the hood according to claim 1 or 2,
The said opening is formed in the slit shape extended in a vehicle front-back direction, and is provided in the both sides in the vehicle width direction of the said bellows part, The front part structure of the hood characterized by the above-mentioned. A front structure of a hood according to any one of claims 1 to 3,
The front structure of the hood, wherein the opening is provided at a position of a mountain ridge line or a valley bottom line in the bellows part, and the bellows part is divided into a plurality in the vehicle width direction. A front structure of a hood according to any one of claims 1 to 4,
A front structure of a hood, wherein a ridge line or a valley bottom line of the bellows portion extends linearly. A front structure of a hood according to claim 4 ,
A hood characterized in that an extending direction of a ridge line and a valley bottom line in one bellows section divided into a plurality in the vehicle width direction by the opening intersects with an extending direction of a ridge line and a valley bottom line in another bellows section. Front structure.

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