JP4760865B2 - Vehicle hood structure - Google Patents

Description

  The present invention relates to a vehicle hood structure, and more particularly to a vehicle hood structure applied to a vehicle such as an automobile.

Conventionally, in a vehicle hood structure applied to a vehicle such as an automobile, an aluminum honeycomb material, hard urethane, glass wool, etc. are filled between the outer panel and the inner panel of the hood to reinforce the engine hood and absorb shocks. A configuration for improving efficiency and reducing impact on a collision body is known (see, for example, Patent Document 1).
Japanese Patent No. 5-155356

  However, in the vehicle hood structure disclosed in Patent Document 1, a filler such as an aluminum honeycomb material, hard urethane, or glass wool is set in a cross section that is formed in the hood inner and has a convex shape downward in the vehicle body. As a result, the gap between the inner panel of the hood and the parts such as the engine below the hood is reduced. For this reason, when the hood collides with the collision object, the entire hood must be arranged above the vehicle body in order to avoid a decrease in the energy absorption stroke of the hood. Cannot enlarge.

  An object of the present invention is to provide a hood structure for a vehicle that can improve the impact absorption efficiency and can improve the aerodynamic performance and expand the front lower end view.

A vehicle hood structure according to a first aspect of the present invention includes an outer panel that constitutes a vehicle body outer surface of the hood, an inner panel that is disposed along a rear surface of the outer panel, and is joined to the outer panel by an adhesive ; A thick plate portion that is partially formed on the inner panel by bonding and has a plate thickness that is thicker than the plate thickness of other portions of the inner panel and abuts against the back surface of the outer panel.

Accordingly, a thick plate portion that is disposed along the back surface of the outer panel of the hood and is bonded to the outer panel by an adhesive has a thick plate portion that is thicker than the plate thickness of the other portion. Therefore, when the colliding body collides with the outer panel, deformation of the outer panel can be suppressed by the thick plate portion of the inner panel. As a result, when the colliding body collides with the outer panel, it is possible to suppress the initial acceleration from decreasing, and the impact absorption efficiency can be improved. Therefore, it is not necessary to dispose a filler between the outer panel and the inner panel. For this reason, the gap between the inner panel of the hood and the parts such as the engine below the hood is increased, and the entire hood is disposed above the vehicle body in order to ensure the energy absorption stroke of the hood when the hood collides with the collision body. There is no need. As a result, the impact absorption efficiency can be improved, and the aerodynamic performance can be improved and the front lower end view can be expanded.

According to a second aspect of the present invention, in the hood structure for a vehicle according to the first aspect , the thick plate portion is set at a position where a distance between the hood and a part under the hood is closer than other parts. And

Therefore, in addition to the contents described in claim 1 , since the thick plate portion of the inner panel is set at a position where the distance between the hood and the parts below the hood is closer than the other parts, When the distance to the part collides with a part closer to the other part, the occurrence of a secondary collision can be suppressed by the thick plate portion.

According to a third aspect of the present invention, in the hood structure for a vehicle according to the second aspect , the part below the thick plate portion is a rigid body .

Therefore, in addition to the content of claim 2 , since the lower part of the thick plate part of the inner panel is a rigid body, when the collision body collides with the part where the part under the hood is a rigid body, the thick plate part Therefore, the occurrence of a secondary collision with a rigid body can be suppressed.

According to a first aspect of the present invention, there is provided a vehicle hood structure comprising: an outer panel that constitutes a vehicle body outer surface of the hood; an inner panel that is disposed along the rear surface of the outer panel and joined to the outer panel by an adhesive; It has a thick plate part that is partly formed by joining and has a plate thickness that is thicker than the plate thickness of the other part of the inner panel and is in contact with the back surface of the outer panel, so that it is possible to improve shock absorption efficiency and aerodynamic performance It has an excellent effect that it is possible to improve and to expand the front lower end view.

According to a second aspect of the invention, in the vehicle hood structure of claim 1, thick portion, the distance between the hood and the hood lower part is set to a site closer than the other portions, according to claim In addition to the effect described in 1 , it has an excellent effect that the occurrence of secondary collision can be suppressed.

According to a third aspect of the invention, in the vehicle hood structure of claim 2, since the lower part of the plank unit is a rigid body, in addition to the effects according to claim 2, secondary rigid It has an excellent effect that the occurrence of collision can be suppressed.

A first embodiment of a vehicle hood structure as a reference example not included in the present invention will be described with reference to FIGS. 1 and 2. In addition, after describing two reference examples (first embodiment and second embodiment) that are not included in the present invention, an embodiment (third embodiment) of the present invention will be described.

  In the figure, the arrow UP indicates the vehicle body upward direction, and the arrow FR in the figure indicates the vehicle body front direction.

  As shown in FIG. 2, in the present embodiment, the hood 10 of the automobile is composed of an outer panel 12 that constitutes the vehicle body outer side surface of the hood 10 and an inner panel 14 that is disposed on the inner side (back side) of the outer panel 12. ing.

As shown in FIG. 1, the outer panel 12 is composed of a plate material of a constant thickness, the inner panel 14 is disposed along the rear surface 12A of the outer panel 12.

  As shown in FIG. 2, in the vicinity of the front end portion of the inner panel 14 in the front-rear direction, a plurality of beads 20, 22, 24 extending in the front-rear direction of the vehicle body are formed at predetermined intervals. Yes.

  One bead 20 is formed at the center in the vehicle width direction of the inner panel 14, and the other two beads 22, 24 are substantially parallel or parallel to the bead 20 on the outer side in the vehicle width direction of the bead 20. Is formed. The beads 20, 22, and 24 have a V-shaped cross section that protrudes downward from the vehicle body. When the hood 10 is deformed downward by a predetermined amount, it interferes with the upper part 32 of the engine or the like below the hood. The length is not set. Specifically, the length L1 of the bead 20, the length L2 of the bead 22, and the length L3 of the bead 24 are set to 600 mm or less, respectively (L1 ≦ 600 mm, L2 ≦ 600 mm, L3 ≦ 600 mm).

  As shown in FIG. 1, the beads 20, 22, and 24 are set to have a width that does not interfere with the upper part 32 of a part such as an engine below the hood when the hood 10 is deformed downward by a predetermined amount. The width W1 of the bead 20, the width W2 of the bead 22, and the width W3 of the bead 24 are respectively set to 20 mm or less (W1 ≦ 20 mm, W2 ≦ 20 mm, W3 ≦ 20 mm). For this reason, for example, a gap V is formed between the upper part 32 of a part such as an engine and the bead 20.

Further, the inner panel 14 at a site other than the bead 20, 22, 24, are the adhesive 30 thus joined to the outer panel 12.

  Next, the operation of this embodiment will be described.

In this embodiment, adhesive 30 inner panel 14 to the outer panel 12 three beads 20, 22, 24 at a site which is disposed along the rear surface 12A of the outer panel 12 is formed at a predetermined interval of the hood 10 Are joined by.

  Therefore, as shown in FIG. 1, when the collision body S collides with the outer panel 12, deformation of the outer panel 12 can be suppressed by the rigidity of the inner panel 14 in which the beads 20, 22, and 24 are formed.

  As a result, when the colliding body S collides with the outer panel 12, it is possible to suppress the initial acceleration from decreasing and to improve the impact absorption efficiency. Therefore, it is necessary to dispose a filler between the outer panel 12 and the inner panel 14. Absent.

  Furthermore, in this embodiment, when the hood 10 is deformed downward by a predetermined amount when the widths W1, W2, and W3 of the beads 20, 22, and 24 and the lengths L1, L2, and L3 are deformed downward by a predetermined amount, the parts such as the engine below the hood. Are set to values that do not interfere with the upper portion 32 (L1 ≦ 600 mm, L2 ≦ 600 mm, L3 ≦ 600 mm, W1 ≦ 20 mm, W2 ≦ 20 mm, W3 ≦ 20 mm). For this reason, a deformation | transformation stroke when the collision body S collides with the hood 10 is securable.

  Therefore, in the present embodiment, the gap H between the portion of the inner panel 14 of the hood 10 where the beads 20, 22, and 24 are not present and the upper portion 32 of the engine or the like below the hood is increased. It is not necessary to arrange the entire hood above the vehicle body in order to ensure the energy absorption stroke of the hood 10 when the vehicle collides.

  For this reason, in this embodiment, impact absorption efficiency can be improved, aerodynamic performance can be improved, and the front lower end view can be expanded.

  In the present embodiment, the three beads 20, 22, 24 are formed on the inner panel 14 of the hood 10. However, the number of beads is not limited to three.

Next, a second embodiment of a vehicle hood structure as a reference example not included in the present invention will be described with reference to FIG.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 3, in this embodiment, notches 34 and 36 are partially formed in the inner panel 14 of the hood 10. These notches 34 and 36 are extended from the vicinity of the front end edge 14B of the inner panel 14 to the vicinity of the rear end edge 14C along the vehicle width direction outer side edge 14A of the inner panel 14, and are rectangular in plan view. It has become.

  The interval K1 between the notch 34 and the notch 36 is set to 300 mm or more, and the portion 14D left by the notches 34, 36 in the inner panel 14 is at least in a top view of the engine 40 disposed below the hood. It has an area larger than the projected area S and is located above the engine 40.

  Next, the operation of this embodiment will be described.

  In the present embodiment, since the hood 10 including the inner panel 14 can be reduced in weight by the notches 34 and 36 partially formed in the inner panel 14, the fuel efficiency of the vehicle is improved.

  Also, beads 20, 22, and 24 are formed in the portion 14D of the inner panel 14 left by the notches 34 and 36, and the portion 14D of the inner panel 14 left by the notches 34 and 36 is arranged at least below the hood. The engine 40 has an area equal to or larger than the projected area S in a top view of the engine 40 and is positioned above the engine 40.

  As a result, since the inner panel 14 can be prevented from interfering with the engine 40 disposed below the hood by the rigidity of the portion 14D of the inner panel 14, the occurrence of a secondary collision can be suppressed and the occurrence of a secondary collision can be suppressed. it can. Further, it is not necessary to arrange the entire hood above the vehicle body in order to ensure the energy absorption stroke of the hood 10 when the hood 10 and the collision object collide.

  For this reason, in this embodiment, impact absorption efficiency can be improved, aerodynamic performance can be improved, and the front lower end view can be expanded.

  In the present embodiment, the notches 34 and 36 are formed along the outer edge 14A of the inner panel 14 in the vehicle width direction. Instead, however, the notches 42 are formed on the inner panel 14 as shown in FIG. The cutout 44 may be formed along the vicinity of the rear end edge portion 14C of the inner panel 14 along the front end edge portion 14B in the vehicle width direction. The interval K2 between the notch 42 and the notch 44 is 300 mm or more. Further, reference numerals 46 and 48 in FIG. 4 indicate beads formed in the inner panel 14 along the vehicle width direction. When the hood 10 is deformed downward by a predetermined amount, the width and length of the beads 46 and 48 are shown. The value is set so as not to interfere with the upper part of the parts such as the engine below the hood (for example, length ≦ 600 mm, width ≦ 20 mm).

  Further, as shown in FIG. 5, the notches 50 and 52 are formed in a triangular shape in a plan view from the vicinity of the center in the front-rear direction of the inner edge 14A of the inner panel 14 toward the inner side in the vehicle width direction. Is formed in a triangular shape in plan view from the vicinity of the vehicle width direction center portion of the front end edge portion 14B of the inner panel 14 toward the rear of the vehicle body, and the notch 56 is formed from the vicinity of the vehicle width direction center portion of the rear end edge portion 14C of the inner panel 14. You may form in a planar view triangle shape toward the vehicle body front. The interval K3 between the notch 50 and the notch 54, the interval K4 between the notch 54 and the notch 52, the interval K5 between the notch 52 and the notch 56, and the interval K6 between the notch 56 and the notch 50 are each 300 mm or more.

Next, a third embodiment which is a vehicle hood structure of the present invention will be described with reference to FIGS. 6 (A) and 7 (A).

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 6A, in this embodiment, the outer panel 12 constituting the outer surface of the vehicle body of the hood 10 has a curved surface that slightly swells above the vehicle body, and the inner panel 14 of the hood 10 Arranged along the entire back surface.

  As shown in FIG. 7A, the rear portion of the inner panel 14 of the hood 10 is a thick plate portion 14E.

  As shown in FIG. 6A, the plate thickness M1 of the thick plate portion 14E of the inner panel 14 is thicker than the plate thickness M2 of the other portion 14F that is a portion of the thick plate portion 14E on the front side of the vehicle body. (M1> M2).

  The component 60 positioned below the thick plate portion 14E is a rigid body such as an engine. In the thick plate portion 14E, the distance S1 between the inner panel 14 and the component 60 is closer than the distance S2 between the other portion 14F and the component 61. It is set to the part.

  The thick plate portion 14E of the inner panel 14 is formed by joining with extrusion molding, tailored blank, FSW or other portion 14F by welding such as laser welding or arc welding, or by bonding.

  Next, the operation of this embodiment will be described.

  Depending on the automobile body, there is a vehicle body in which the gap between the hood inner 14 and the parts below the hood inner 14 is small on the entire surface of the hood 10. In this case, as in the present embodiment, the lower part 60 in the inner panel 14 is a rigid body, and the distance S1 between the inner panel 14 and the part 60 is closer to the part S2 between the other part 14F and the part 61, By setting the thick plate portion 14E where the plate thickness M1 is thicker than the plate thickness M2 of the other portion 14F, the deformation of the outer panel 12 can be suppressed by the rigidity of the plate thickness M2.

  As a result, when the colliding body collides with the outer panel 12, it can suppress that initial acceleration falls, and it can improve impact absorption efficiency.

  In addition, the gap S1 between the inner panel 14 of the hood 10 and the component 60 below the hood 10 is larger than the configuration in which the bead is formed on the inner panel 14, and the energy of the hood 10 when the hood 10 collides with the collision object. It is not necessary to arrange the entire hood above the vehicle body in order to secure the absorption stroke.

  For this reason, the impact absorption efficiency can be improved, and aerodynamic performance can be improved and the front lower end view can be expanded.

  Instead of the configuration shown in FIGS. 6A and 7A, the inner panel 14 is partially provided with respect to the outer panel 12 of the hood 10 as shown in FIGS. 6B and 7B. For example, it is good also as a structure arrange | positioned in the vehicle width direction center part.

Further, instead of the configuration shown in FIG. 6 (A) and FIG. 7 (A), as shown in FIG. 6 (C) and FIG. 7 (C), the vehicle width direction outer side of the left and right of the inner panel 14 of the hood 10 It is good also as a structure which each formed the notch 80 of the planar view triangle shape toward the vehicle width direction inner side in the edge part.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

It is sectional drawing along the 1-1 line | wire of FIG. It is a top view which shows the hood structure for vehicles which concerns on 1st Embodiment as a reference example which is not included in this invention . It is a top view which shows the hood structure for vehicles which concerns on 2nd Embodiment as a reference example which is not included in this invention . It is a top view which shows the hood structure for vehicles which concerns on the modification of 2nd Embodiment as a reference example which is not included in this invention . It is a top view which shows the hood structure for vehicles which concerns on the other modification of 2nd Embodiment as a reference example not included in this invention . 7A is a cross-sectional view taken along line 6-6 in FIG. 7A, FIG. 7B is a cross-sectional view taken along line 6-6 in FIG. 7B, and FIG. It is sectional drawing which followed the 6-6 line of (C). (A) It is a top view which shows the hood structure for vehicles which concerns on 3rd Embodiment which is this invention, (B) It is a top view which shows the hood structure for vehicles concerning the modification of 3rd Embodiment of this invention, (C) It is a top view which shows the hood structure for vehicles which concerns on the modification of 3rd Embodiment of this invention.

Explanation of symbols

10 Hood 12 Outer panel of hood 14 Inner panel of hood 14E Thick plate of inner panel

Claims (3)

An outer panel constituting the outer surface of the hood body;
An inner panel disposed along the back surface of the outer panel and joined to the outer panel by an adhesive ;
A thick plate portion that is partly formed by bonding to the inner panel and has a plate thickness that is thicker than the plate thickness of the other part of the inner panel and is in contact with the back surface of the outer panel;
A vehicle hood structure characterized by comprising:   The vehicular hood structure according to claim 1, wherein the thick plate portion is set at a position where a distance between the hood and a part below the hood is shorter than other parts.   The vehicle hood structure according to claim 2, wherein a part below the thick plate portion is a rigid body.

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