WO2020013181A1 - Engine hood inner panel - Google Patents

Abstract

This engine hood inner panel is provided with a plurality of punched holes 7 formed penetrating vertically, a framework portion 8 formed between the punched holes 7, and beads 32 formed in the framework portion 8, wherein the beads 32 extend in a direction orthogonal to a longitudinal direction of the framework portion 8, and are formed in the framework portion 8 in the shape of grooves which are recessed toward an outer panel 3.

Description

Engine hood inner panel

The present disclosure relates to an inner panel of an engine hood that covers an engine from above.

エ ン ジ ン A plurality of punched holes penetrating vertically are formed in the inner panel of the engine hood that covers the engine from above, and elongated bones are formed between the punched holes.

横 In addition, a lateral bead is formed in the inner panel to control the folding mode of the engine hood at the time of a frontal collision for the purpose of protecting the occupant. The lateral bead extends substantially in the vehicle width direction, and forms a fold for bending the engine hood into an inverted V-shape in a side view at the time of a frontal collision. This prevents the engine hood from entering the vehicle interior while keeping the horizontal shape.

JP-A-2015-107701 Japanese Patent Application Publication No. 2017-47699 Japanese Patent Application Laid-Open No. 2004-322985

In recent years, engine hoods have been required to have not only a passenger protection function but also a pedestrian protection function.

車 両 As a vehicle hood structure having a pedestrian protection function, one described in Patent Document 1 is known. In this vehicle hood structure, a lower bead extending in the vehicle width direction is formed in the middle of the bone. According to such a vehicle hood structure, when the head of the pedestrian collides with the engine hood, it is considered that the impact can be reduced.

However, there is room for improvement in the vehicle hood structure described above.

Accordingly, the present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide an inner panel of an engine hood that can improve pedestrian protection performance.

According to one aspect of the present disclosure,
An inner panel of the engine hood provided on the back of the outer panel of the engine hood,
A plurality of punched holes formed penetrating vertically,
A bone formed between the plurality of punched holes,
Comprising a bead formed in the bone part,
An inner panel of an engine hood is provided, wherein the bead extends in a direction orthogonal to a longitudinal direction of the bone portion, and is formed in the bone portion in a groove shape recessed toward the outer panel. .

Preferably, the bone portion is formed in an arc-shaped cross section with its outer peripheral surface facing the outer panel side.

Preferably, the radius of curvature of the inner peripheral surface of the bead is set smaller than the radius of curvature of the outer peripheral surface of the bone.

Preferably, a lip portion for adhering to an outer panel of the engine hood is formed on the bone portion so as to protrude in a direction orthogonal to a longitudinal direction of the bone portion, and the bead includes the lip portion. The bones may be arranged so as to be sandwiched from outside in the longitudinal direction.

Preferably, the vehicle includes a pair of left and right lateral beads formed to extend in the vehicle left-right direction and formed on the same straight line, and the bead is arranged on the bone part on the same straight line as the pair of left and right lateral beads. It is good to be done.

Preferably, the bone includes a first bone and a second bone connected to an intermediate position in the longitudinal direction of the first bone, wherein the first bone includes the second bone. It is preferable that the bead is arranged so as to sandwich an intersection with the second bone from the outside in the longitudinal direction of the first bone.

According to the above aspect, pedestrian protection performance can be improved.

FIG. 1 is a schematic top view of an inner panel of an engine hood according to an embodiment of the present disclosure as viewed from above. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a perspective view of a main part of FIG. 1 as viewed obliquely from above. FIG. 4 is a sectional view taken along line BB of FIG. FIG. 5 is a cross-sectional view of FIG. 4 viewed from an orthogonal direction. FIG. 6 is an explanatory diagram for explaining the operation of the bead. FIG. 7 is a sectional view taken along line BB of FIG. FIG. 8 is an explanatory diagram for explaining the operation of the comparative example. FIG. 9 is a sectional view taken along line CC of FIG.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. The directions of front, rear, left, right, up, and down in the embodiments described below refer to the respective directions of the vehicle.

FIG. 1 is a schematic top view of an inner panel 2 when an engine hood 1 disposed at a front portion of a vehicle is viewed through an outer panel. FIG. 2 is a sectional view taken along line AA of FIG.

As shown in FIG. 2, the engine hood 1 includes an outer panel 3 arranged substantially horizontally above an engine (not shown), and an inner panel 2 provided on a lower surface (back surface) of the outer panel 3.

The outer panel 3 is formed so that the position on the rear side is higher than that on the front side.

The inner panel 2 is made of a steel plate. The outer shape of the inner panel 2 is substantially the same as the outer panel 3, and the outer edge 4 is integrally fixed to the outer panel 3 by hemming. Further, a separation area portion 5 is formed on the inner panel 2 inside the outer edge portion 4 so as to be separated downward from the outer panel 3, and a central area portion of the inner panel 2 is a proximity area portion which is close to the outer panel 3. 6 are formed.

As shown in FIG. 1, a punched hole 7 for reducing the weight and a bone 8 for securing necessary rigidity are formed in the proximity area 6.

複数 A plurality of punched holes 7 are formed penetrating the inner panel 2 vertically. The bone parts 8 are formed between the adjacent punched holes 7 and a plurality of the bone parts 8 are formed.

The bone portion 8 includes a vertical bone portion 9 extending in the front-rear direction, and an oblique bone portion 10 extending in the front-rear direction and extending in the left-right direction.

The vertical bone portion 9 has a central vertical bone portion 11 arranged at the center in the left-right direction of the proximity area portion 6 and a position offset from the center in the left-right direction of the proximity area portion 6 by about 1/4 of the entire width to the right. There is a right vertical bone portion 12 disposed at a position offset from the center of the proximity area 6 in the left-right direction by about 1/4 of the entire width to the left. The central vertical bone 11 extends from the front end to the rear end of the proximity area 6. The right vertical bone portion 12 and the left vertical bone portion 13 extend from the front end of the proximity area portion 6 to an intermediate position in the front-rear direction.

The oblique portion 10 includes a large oblique portion 14 extending from the front end to the rear end of the proximity area portion 6 and a small oblique portion 15 formed shorter than the large oblique portion 14.

The large oblique portion 14 includes a right outer oblique portion 14 a extending from the right rear end corner of the proximity area portion 6 to the front end of the right vertical portion 12, and a central vertical portion extending from the front end of the right vertical portion 12. A right medial oblique bone portion 14b extending to the rear end of the bone portion 11, a left medial oblique bone portion 14c extending from the rear end of the central longitudinal bone portion 11 to the front end of the left longitudinal bone portion 13, and a left longitudinal bone There is a left outer oblique bone portion 14 d extending from the front end of the portion 13 to the left rear end corner of the proximity area portion 6.

The small oblique portion 15 includes a right lateral small oblique portion 16a extending from a rear end of the right lateral oblique portion 14a to a rear end of the right longitudinal portion 12, and a rear end of the right longitudinal portion 12 from the rear end of the right longitudinal portion 12. A right inner small oblique portion 16b extending to the rear end of the right inner oblique portion 14b, and a left inner small oblique bone extending from the rear end of the left inner oblique portion 14c to the rear end of the left vertical portion 13 There is a portion 16c and a left outer small oblique portion 16d extending from the rear end of the left vertical bone portion 13 to the rear end of the left outer large oblique portion 14d.

Further, the small oblique portion 15 includes a right outer relay oblique portion 17a extending right forward from an intermediate position of the right outer oblique portion 14a to the right side of the proximity area portion 6, and a right inner oblique portion 14b. , A right inner relay oblique portion 17b extending from the middle position to the front end of the central vertical bone portion 11, and a left inner relay oblique extending from the front end of the central vertical bone portion 11 to an intermediate position of the left inner oblique bone portion 14c. There is a bone portion 17c and a left outer relay small oblique portion 17d extending leftward and forward from an intermediate position of the left lateral oblique portion 14d to the left side of the proximity area portion 6.

That is, the proximity area 6 includes a first crossing portion 18 where the right outer oblique bone portion 14a and the right outer small oblique portion 16a intersect, the right outer oblique bone portion 14a, the right vertical bone portion 12, and the right inner side. A second crossing portion 19 where the major oblique portion 14b intersects, a right medial oblique portion 16b, a right medial oblique portion 14b, a central longitudinal portion 11, a left medial oblique portion 14c, and a left medial oblique portion. A third intersection 20 where the portions 16c intersect, a fourth intersection 21 where the left medial oblique portion 14c, the left vertical bone portion 13 and the left lateral oblique portion 14d intersect, and a left lateral small oblique portion 16d And a fifth intersecting portion 22 where the left outer oblique bone portion 14d intersects.

The proximity area 6 includes a sixth intersection 23 where the right outer major oblique portion 14a and the right outer relay oblique portion 17a intersect, a right vertical bone portion 12, a right outer small oblique portion 16a, and a right outer oblique portion 16a. A seventh intersecting portion 24 where the inner small oblique portion 16b intersects, an eighth intersecting portion 25 where the right inner oblique portion 14b and the right inner relay oblique portion 17b intersect, and a right inner relay oblique portion 17b A ninth intersection 26 where the central longitudinal bone 11 and the left inner small oblique part 17c intersect, and a tenth intersection 27 where the left inner intermediate small oblique part 17c and the left medial oblique part 14c intersect. The eleventh intersection 28 where the left vertical bone part 13, the left inner small oblique part 16c and the left outer small oblique part 16d intersect, the left outer great oblique part 14d and the left outer relay small oblique part 17d intersect. A twelfth intersecting portion 29 is formed.

FIG. 3 is a perspective view of the proximity area 6 (main part) as seen through the outer panel 3 from above. In the figure, the thin line extending along the vertical bone 9 and the oblique bone 10 and the like is for representing the shape. FIG. 4 is a sectional view taken along line BB of FIG.

及 び As shown in FIGS. 3 and 4, each of the vertical bone portion 9 and the oblique bone portion 10 is formed to have an arc-shaped cross section with the outer peripheral surface facing downward (the outer peripheral surface faces the outer panel side). Further, the widths (dimensions in a direction orthogonal to the longitudinal direction) w of the vertical bone portion 9 and the oblique bone portion 10 are all set to be substantially the same, and the cross-sectional areas are all set to be substantially the same. In addition, the width dimension w and the cross-sectional area of the vertical bone part 9 and the oblique bone part 10 may be different depending on the part.

リ ッ プ Further, the lip portion 31 is formed on the vertical bone portion 9 and the oblique bone portion 10 so as to protrude in a direction orthogonal to the longitudinal direction. The lip portion 31 is adhered to the back surface of the outer panel 3 via a rubber-like intermediate member (not shown). Thereby, the vertical bone part 9 and the oblique bone part 10 are separated from the outer panel 3 with a slight gap.

ビ ー Beads 32 are formed in the vertical bone portion 9 and the oblique bone portion 10. The bead 32 is for bending the vertical bone portion 9 and the oblique bone portion 10 which have received an external force from above. As shown in FIG. 5, the bead 32 is formed in a groove shape having an arc-shaped cross section on the bottom surface 30 facing the vertical bone portion 9 and the oblique bone portion 10. That is, the bead 32 is formed to be recessed upward (toward the outer panel). Thereby, the vertical bone portion 9 and the oblique bone portion 10 are easily bent by a force from above, and the pedestrian protection performance is improved. This operation will be described with reference to FIGS. As shown in FIG. 6, when the impactor 40 collides with the outer panel 3 close to the bead 32 from above, the bead 32 is bent around the shaft 41 shown in FIG. Force acts. At this time, as in the comparative example shown in FIGS. 8 and 9, even if the bead 42 is recessed downward (toward the outer panel side), a bending force acts on the bead 42 about the shaft 41. However, the shape depressed toward the outer panel side decreases the second moment of area with respect to the shaft 41 as compared with the shape depressed toward the outer panel side, and the strength of the vertical bone portion 9 and the oblique bone portion decreases. Therefore, the vertical bone portion 9 and the oblique bone portion 10 having the bead 32 having the concave shape on the outer panel side are more easily broken than the vertical bone portion 9 and the oblique bone portion 10 having the bead 42 having the concave shape on the side opposite to the outer panel side. And pedestrian protection performance is improved.

Further, the radius of curvature r of the inner peripheral surface of the bead 32 is set smaller than the radius of curvature R of the outer peripheral surfaces of the vertical bone portion 9 and the oblique bone portion 10 (see FIG. 4). The radius of curvature r of the inner peripheral surface of the bead 32 may be set to be larger than the radius of curvature R of the outer peripheral surfaces of the vertical bone 9 and the oblique bone 10.

The bead 32 can be easily bent and stretched most easily when it receives a load from above by extending in a direction perpendicular to the longitudinal direction of the vertical bone portion 9 and the oblique bone portion 10. That is, the impact is more efficiently absorbed, and the pedestrian protection performance is improved.

In addition, as shown in FIGS. 1 and 3, the bead 32 is formed at each of the intersections 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 in the vertical part 9 and the oblique part 10. , 29 adjacent to each other.

In particular, positions adjacent to the sixth intersection 23, the eighth intersection 25, the ninth intersection 26, the tenth intersection 27, and the twelfth intersection 29 with respect to each relay small oblique portion 17a, 17b, 17c, 17d. In each of the major oblique bone portions 14a, 14b, 14c, 14d and the central longitudinal bone portion 11, the beads 32 are sandwiched so as to sandwich each of the intersections 23, 25, 26, 27, 29 from the outside in the longitudinal direction (front-back direction). Is arranged.

The relay small oblique portions 17a, 17b, 17c, 17d effectively increase the strength of the proximity area portion 6. For this reason, by arranging the bead 32 so as to sandwich the intersections 23, 25, 26, 27, and 29 with respect to the relay small oblique portions 17a, 17b, 17c, and 17d in the front-rear direction, the bead 32 is locally exposed to an impact from above. It is possible to prevent or suppress the formation of a physically strong portion. In this embodiment, the relay small oblique portions 17a, 17b, 17c, and 17d are connected to the large oblique portions 14a, 14b, 14c, and 14d and the central vertical bone portion 11. , But is not limited to this. For example, the relay small oblique part (not shown) may be connected to the right vertical part 12, the left vertical part 13, and the small oblique parts 16a, 16b, 16c, 16d. In this case, the bead 32 is disposed between the right vertical bone part 12, the left vertical bone part 13, and the small oblique bone parts 16a, 16b, 16c, 16d so as to sandwich the intersection with the relay small oblique bone part from the front and rear direction. Good to be. That is, the relay small oblique bone may be connected to any bone (hereinafter, the first bone). Further, it is preferable that the bead 32 is arranged on the first bone portion so as to sandwich the intersection with the relay small oblique portion (second oblique portion) from the outside in the longitudinal direction.

ビ ー Further, the bead 32 is disposed so as to sandwich the lip portion 31 from the outside in the longitudinal direction of the vertical bone portion 9 and the oblique bone portion 10 (front-back direction). The vertical bone portion 9 and the oblique bone portion 10 in the vicinity of the lip portion 31 have a large bone width, and the strength increases because the lip portion 31 is bonded to the outer panel 3 via an intermediate member (not shown). easy. For this reason, by disposing the bead 32 so as to sandwich the lip portion 31 from the front and rear, it is possible to prevent or suppress the formation of a portion that is locally robust against an impact from above.

{Circle around (4)} In the left and right separation area portions 5 located on the side of the proximity area portion 6, horizontal beads 33 each having a V-shaped cross section are formed. These left and right horizontal beads 33 extend in the left-right direction and are arranged on the same straight line L. The horizontal bead 33 is formed to be larger in size than the bead 32. The bead 32 is arranged on the vertical bone 9 and the oblique bone 10 on the same straight line L as the horizontal bead 33.

The bead 32 extends in the direction perpendicular to the longitudinal direction of the vertical bone part 9 and the oblique bone part 10 as described above. do. That is, when a vehicle (not shown) equipped with the engine hood 1 collides head-on with a strong obstacle such as a building, the engine hood 1 is stably bent along the straight line L, and the engine hood 1 is inverted V in a side view. Make it shaped. This prevents the engine hood 1 from entering the vehicle interior (not shown) while maintaining the horizontal shape.

Although the embodiments of the present disclosure have been described above in detail, the present disclosure may include the following other embodiments.

(1) The bone portion 8 is not limited to an arc-shaped cross section. For example, the bone portion 8 may have a V-shaped cross section, a polygonal cross section, or another cross section.

(2) The bead 32 is not limited to an arc-shaped cross section. For example, the bead 32 may have a V-shaped cross section, a polygonal cross section, or another cross section.

(3) The horizontal bead 33 is not limited to the V-shaped cross section. For example, the horizontal bead 33 may be arc-shaped in cross section, polygonal in cross section, or another cross section.

The configurations of the above embodiments can be partially or wholly combined unless there is a particular contradiction. Embodiments of the present disclosure are not limited to only the above-described embodiments, and all modifications, applications, and equivalents included in the spirit of the present disclosure defined by the claims are included in the present disclosure. Therefore, the present disclosure should not be construed as limiting, but can be applied to any other technology belonging to the scope of the idea of the present disclosure.

This application is based on a Japanese patent application filed on July 12, 2018 (Japanese Patent Application No. 2018-132234), the contents of which are incorporated herein by reference.

The inner panel of the engine hood according to the present disclosure is useful in that pedestrian protection performance can be improved.

DESCRIPTION OF SYMBOLS 1 Engine hood 2 Inner panel 3 Outer panel 7 Punched hole 8 Bone 32 Bead

Claims (6)

An inner panel of the engine hood provided on the back of the outer panel of the engine hood,
A plurality of punched holes formed penetrating vertically,
A bone formed between the plurality of punched holes,
Comprising a bead formed in the bone part,
The inner panel of an engine hood, wherein the bead extends in a direction orthogonal to a longitudinal direction of the bone portion, and is formed in the bone portion in a groove shape recessed toward the outer panel. 2. The inner panel of the engine hood according to claim 1, wherein the bone portion is formed in an arc-shaped cross section with its outer peripheral surface facing the outer panel side. 3. The inner panel of the engine hood according to claim 2, wherein a radius of curvature of an inner peripheral surface of the bead is set smaller than a radius of curvature of an outer peripheral surface of the bone. A lip portion for bonding to the outer panel of the engine hood is formed on the bone portion so as to protrude in a direction perpendicular to a longitudinal direction of the bone portion,
The inner panel of the engine hood according to any one of claims 1 to 3, wherein the bead is disposed so as to sandwich the lip from outside in the longitudinal direction of the bone. A pair of left and right lateral beads are formed extending in the vehicle left-right direction and formed on the same straight line,
The inner panel of an engine hood according to any one of claims 1 to 4, wherein the bead is disposed on the bone portion on the same straight line as the pair of left and right lateral beads. The bone includes a first bone and a second bone connected to a longitudinally intermediate position of the first bone,
The bead is arranged in the 1st bone part so that an intersection with the 2nd bone part may be inserted from the outside in the longitudinal direction of the 1st bone part. An inner panel of the engine hood according to claim 1.

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