JP2005053265A - Hood structure for vehicle - Google Patents

Hood structure for vehicle Download PDF

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Publication number
JP2005053265A
JP2005053265A JP2003206152A JP2003206152A JP2005053265A JP 2005053265 A JP2005053265 A JP 2005053265A JP 2003206152 A JP2003206152 A JP 2003206152A JP 2003206152 A JP2003206152 A JP 2003206152A JP 2005053265 A JP2005053265 A JP 2005053265A
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JP
Japan
Prior art keywords
hood
vehicle
inner panel
panel
outer panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003206152A
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Japanese (ja)
Inventor
Yoshihide Endo
欣秀 遠藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
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Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2003206152A priority Critical patent/JP2005053265A/en
Publication of JP2005053265A publication Critical patent/JP2005053265A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a hood structure for a vehicle capable of improving shock absorbing efficiency. <P>SOLUTION: An inner panel 16 of a hood 10 is disposed with a prescribed width W (W≥300m) at a vehicle width direction center part of the hood 10. The cross sectional shape viewed from a vehicle body longitudinal direction is formed into a straight line shape without a curve. Each of vehicle width direction outside edge parts 16A of the inner panel 16 is joined to an internal surface (rear face) 12A of an outer panel 12 by adhesion, etc. The cross sectional shape viewed from a vehicle width direction of the inner panel 16 is also formed into the straight line without a curve. Each of a front end edge part and a rear end edge part of the inner panel 16 is joined to the internal surface 12A of the outer panel 12 by adhesion, etc. As a result, shock absorbing efficiency is improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は車両用フード構造に関し、特に、自動車等の車両において衝突時に衝突体を保護する車両用フード構造に関する。
【0002】
【従来の技術】
従来から、自動車等の車両用フード構造においては、プレスにより成形された一枚もののインナパネル(インナフードともいう)の外周を、アウタパネルにヘミング加工で一体とした構成が知られている(例えば、特許文献1参照)。
【0003】
【特許文献1】
特開平11−321714号公報
【0004】
【発明が解決しようとする課題】
しかしながら、特許文献1の車両用フード構造では、インナパネルの形状が、アウタパネルの形状に沿って車体上方へ膨らんだ(凸の)湾曲形状となっている。この結果、衝突体がフードに衝突した場合には、アウタパネルとともにインナパネルも前記湾曲形状に対して反転した車体下方へ膨らんだ(凹の)湾曲形状に変形する。このため、フードが凸の湾曲形状から凹の湾曲形状に反転するまでの間は、衝突体に作用するフードからの反力が小さく、衝突体は実質的に空走する。従って、特許文献1の車両用フード構造では、衝突荷重の立ち上がりが遅れ、衝撃吸収効率が低下する。
【0005】
本発明は上記事実を考慮し、衝撃吸収効率を向上できる車両用フード構造を提供することが目的である。
【0006】
【課題を解決するための手段】
請求項1記載の本発明の車両用フード構造は、フードの車体外側面を構成すると共に車体上方に膨らんだ曲面とされたアウタパネルと、
前記アウタパネルの裏面に接合され平板とされたインナパネルと、を有することを特徴とする。
【0007】
従って、衝突体がフードに衝突し、アウタパネルが車体上方に膨らんだ凸形状から車体下方に膨らんだ凹形状に反転しようとした場合には、アウタパネルの裏面に接合され平板とされたインナパネルが、衝突初期から引っ張り力によって、アウタパネルが凸形状から凹形状に反転するのを阻止しようとする。この結果、衝突体の実質的な空走が無くなり、衝突荷重が迅速に立ち上がる。このため、フードの衝撃吸収効率を向上できる。また、インナパネルによって、フード全体の車体下方への変形量を低減できるため、インナパネルが下方のエンジン等の部材に2次衝突する可能性も低減できる。
【0008】
請求項2記載の本発明の車両用フード構造は、フードの車体外側面を構成すると共に車体上方に膨らんだ曲面とされたアウタパネルと、
前記アウタパネルの裏面に接合され、車体下方に膨らんだ曲面とされたインナパネルと、を有することを特徴とする。
【0009】
従って、衝突体がフードに衝突し、アウタパネルが車体上方に膨らんだ凸形状から車体下方に膨らんだ凹形状に反転しようとした場合には、アウタパネルの裏面に接合され車体下方に膨らんだ曲面とされたインナパネルが、衝突初期から引っ張り力によって、アウタパネルが凸形状から凹形状に反転するのを阻止しようとする。この結果、衝突体の実質的な空走が無くなり、衝突荷重が迅速に立ち上がる。このため、フードの衝撃吸収効率を向上できる。また、インナパネルによって、フード全体の車体下方への変形量を低減できるため、インナパネルが下方のエンジン等の部材に2次衝突する可能性も低減できる。
【0010】
【発明の実施の形態】
本発明における車両用フード構造の第1実施形態を図1〜図3に従って説明する。
【0011】
なお、図中矢印UPは車体上方方向を示し、図中矢印FRは車体前方方向を示している。
【0012】
図3に示される如く、本実施形態では、自動車のフード10がフード10の車体外側面を構成するアウタパネル12と、アウタパネル12の内側(裏面側)の外周部に配設されたインナパネル14と、アウタパネル12の内側の車幅方向中央部に車体前後方向に沿った配設されたインナパネル16とで構成されている。
【0013】
図1及び図2に示される如く、アウタパネル12は一定の厚さの板材で構成されており、車体上方に膨らんだ曲面とされている。一方、インナパネル16は一定の厚さの板材で構成されており、平板とされている。
【0014】
図1に示される如く、インナパネル16は、フード10の車幅方向中央部に所定幅W(W≧300mm)で配設されており、車体前後方向から見た断面形状は湾曲のない直線形状となっている。また、インナパネル16の車幅方向外側縁部16Aは、それぞれアウタパネル12の内面(裏面)12Aに接着等によって接合されている。
【0015】
図2に示される如く、インナパネル16は、フード10の前端縁部及び後端部に配設されたインナパネル14の間の全域に配設されており、車幅方向(車体側方)から見た断面形状も湾曲のない直線形状となっている。また、インナパネル16の前端縁部16Bと後端縁部16Cとは、それぞれアウタパネル12の内面(裏面)12Aに接着等によって接合されている。
【0016】
次に、本実施形態の作用を説明する。
【0017】
本実施形態では、衝突体Sがフード10に衝突し、アウタパネル12が車体上方に膨らんだ凸形状から車体下方に膨らんだ凹形状に反転しようとした場合には、アウタパネル12の裏面に接合され平板とされたインナパネル16が、衝突初期から引っ張り力によって、アウタパネル12が凸形状から凹形状に反転するのを阻止しようとする。
【0018】
この結果、アウタパネル12に衝突した後の衝突体Sの実質的な空走が無くなり、衝突荷重が迅速に立ち上がる。このため、フード10の衝撃吸収効率を向上できる。
【0019】
また、本実施形態では、インナパネル16によってフード10全体の車体下方への変形量を低減できる。このため、インナパネル16が下方のエンジン等の部材に2次衝突する可能性も低減できる。
【0020】
なお、本実施形態では、インナパネル16をフード10の車幅方向中央部に所定幅W(W≧300mm)で配設したが、これに代えて、図4に示される如く、インナパネル16をアウタパネル12の内側の外周部を含むフード10の全面に配設しても良い。また、図示を省略したが、複数個のインナパネル16をアウタパネル12の内側に車体前後方向、車体前後方向に対して車幅方向に傾斜した方向または車幅方向に沿って配設した構成としても良い。
【0021】
次に、本発明に係る車両用フード構造の第2実施形態を図5及び図6に従って説明する。
【0022】
なお、第1実施形態と同一部材は、同一符号を付してその説明を省略する。
【0023】
図5に示される如く、本実施形態では、インナパネル16は、フード10の車幅方向中央部に所定幅W(W≧300mm)で配設されており、車体前後方向から見た断面形状が車体下方に膨らんだ曲面形状となっている。また、インナパネル16の車幅方向外側縁部16Aは、それぞれアウタパネル12の内面(裏面)12Aに接着等によって接合されている。
【0024】
図6に示される如く、インナパネル16は、フード10の前端縁部及び後端部に配設されたインナパネル14の間の全域に配設されており、車幅方向(車体側方)から見た断面形状が車体下方に膨らんだ曲面形状となっている。また、インナパネル16の前端縁部16Bと後端縁部16Cとは、それぞれアウタパネル12の内面(裏面)12Aに接着等によって接合されている。
【0025】
次に、本実施形態の作用を説明する。
【0026】
本実施形態では、衝突体Sがフード10に衝突し、アウタパネル12が車体上方に膨らんだ凸形状から車体下方へ膨らんだ凹形状に反転しようとした場合には、アウタパネル12の裏面に接合され車体下方に膨らんだ曲面形状とされたインナパネル16が、衝突初期から引っ張り力によって、アウタパネル12が凸形状から凹形状に反転するのを阻止しようとする。
【0027】
この結果、アウタパネル12に衝突した後の衝突体Sの実質的な空走が無くなり、衝突荷重が迅速に立ち上がる。このため、フード10の衝撃吸収効率を向上できる。
【0028】
また、本実施形態では、インナパネル16によってフード10全体の車体下方への変形量を低減できる。このため、インナパネル16が下方のエンジン等の部材に2次衝突する可能性も低減できる。
【0029】
なお、本実施形態においても、図示を省略したが、インナパネル16をアウタパネル12の内側の外周部を含むフード10の全面に配設しても良い。また、図示を省略したが、複数個のインナパネル16をアウタパネル12の内側に車体前後方向、車体前後方向に対して車幅方向に傾斜した方向または車幅方向に沿って配設した構成としても良い。
【0030】
以上に於いては、本発明を特定の実施形態について詳細に説明したが、本発明はかかる実施形態に限定されるものではなく、本発明の範囲内にて他の種々の実施形態が可能であることは当業者にとって明らかである。
【0031】
【発明の効果】
請求項1記載の本発明の車両用フード構造は、フードの車体外側面を構成すると共に車体上方に膨らんだ曲面とされたアウタパネルと、アウタパネルの裏面に接合され平板とされたインナパネルと、を有するため、衝撃吸収効率を向上できるという優れた効果を有する。また、インナパネルが下方のエンジン等の部材に2次衝突する可能性も低減できるという優れた効果を有する。
【0032】
請求項2記載の本発明の車両用フード構造は、フードの車体外側面を構成すると共に車体上方に膨らんだ曲面とされたアウタパネルと、アウタパネルの裏面に接合され、車体下方に膨らんだ曲面とされたインナパネルと、を有するため、衝撃吸収効率を向上できるという優れた効果を有する。また、インナパネルが下方のエンジン等の部材に2次衝突する可能性も低減できるという優れた効果を有する。
【図面の簡単な説明】
【図1】図3の1−1線に沿った断面図である。
【図2】図3の2−2線に沿った断面図である。
【図3】本発明の第1実施形態に係る車両用フード構造を示す平面図である。
【図4】本発明の第1実施形態の変形例に係る車両用フード構造を示す図1に対応する断面図である。
【図5】本発明の第2実施形態に係る車両用フード構造を示す図1に対応する断面図である。
【図6】本発明の第2実施形態に係る車両用フード構造を示す図2に対応する断面図である。
【符号の説明】
10 フード
12 フードのアウタパネル
16 フードのインナパネル
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hood structure for a vehicle, and more particularly to a hood structure for a vehicle that protects a collision body at the time of a collision in a vehicle such as an automobile.
[0002]
[Prior art]
Conventionally, in a vehicle hood structure such as an automobile, a configuration in which the outer periphery of a single inner panel (also referred to as an inner hood) formed by pressing is integrated with an outer panel by hemming is known (for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-11-321714 [0004]
[Problems to be solved by the invention]
However, in the vehicle hood structure disclosed in Patent Document 1, the shape of the inner panel is a curved shape that bulges (above) the vehicle body along the shape of the outer panel. As a result, when the colliding body collides with the hood, the inner panel as well as the outer panel is deformed into a curved shape that bulges downward (recessed) with respect to the curved shape. For this reason, until the hood is inverted from the convex curved shape to the concave curved shape, the reaction force from the hood acting on the collision body is small, and the collision body substantially runs idle. Therefore, in the vehicle hood structure of Patent Document 1, the rising of the collision load is delayed, and the impact absorption efficiency is lowered.
[0005]
In view of the above facts, an object of the present invention is to provide a vehicle hood structure capable of improving impact absorption efficiency.
[0006]
[Means for Solving the Problems]
The vehicle hood structure according to the first aspect of the present invention includes an outer panel that forms a vehicle body outer side surface of the hood and has a curved surface that swells above the vehicle body.
And an inner panel joined to the back surface of the outer panel to form a flat plate.
[0007]
Therefore, when the colliding body collides with the hood and the outer panel tries to reverse from the convex shape swelled to the upper side of the vehicle body to the concave shape swelled to the lower side of the vehicle body, the inner panel joined to the back surface of the outer panel is a flat plate, It tries to prevent the outer panel from reversing from a convex shape to a concave shape by a pulling force from the beginning of the collision. As a result, there is no substantial idling of the collision object, and the collision load rises quickly. For this reason, the impact absorption efficiency of the hood can be improved. Further, since the inner panel can reduce the amount of deformation of the entire hood below the vehicle body, the possibility that the inner panel collides with a member such as the engine below is reduced.
[0008]
A vehicle hood structure according to a second aspect of the present invention includes an outer panel that forms a vehicle body outer side surface of the hood and has a curved surface that swells above the vehicle body,
And an inner panel that is joined to the back surface of the outer panel and has a curved surface that swells downward from the vehicle body.
[0009]
Therefore, when the colliding body collides with the hood and the outer panel tries to reverse from the convex shape that swells upward to the concave shape that swells downward of the vehicle body, the curved surface is joined to the back surface of the outer panel and bulges downward of the vehicle body. The inner panel tries to prevent the outer panel from reversing from the convex shape to the concave shape due to the pulling force from the beginning of the collision. As a result, there is no substantial idling of the collision object, and the collision load rises quickly. For this reason, the impact absorption efficiency of the hood can be improved. Further, since the inner panel can reduce the amount of deformation of the entire hood below the vehicle body, the possibility that the inner panel collides with a member such as the engine below is reduced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A vehicle hood structure according to a first embodiment of the present invention will be described with reference to FIGS.
[0011]
In the figure, the arrow UP indicates the upward direction of the vehicle body, and the arrow FR in the figure indicates the forward direction of the vehicle body.
[0012]
As shown in FIG. 3, in the present embodiment, the hood 10 of the automobile has an outer panel 12 that constitutes the outer surface of the vehicle body of the hood 10, and an inner panel 14 that is disposed on the outer periphery of the inner panel 12 (back side). The inner panel 16 is arranged at the center in the vehicle width direction inside the outer panel 12 along the longitudinal direction of the vehicle body.
[0013]
As shown in FIGS. 1 and 2, the outer panel 12 is made of a plate material having a constant thickness, and has a curved surface that swells above the vehicle body. On the other hand, the inner panel 16 is made of a plate material having a constant thickness and is a flat plate.
[0014]
As shown in FIG. 1, the inner panel 16 is disposed at a central portion in the vehicle width direction of the hood 10 with a predetermined width W (W ≧ 300 mm), and the cross-sectional shape viewed from the front-rear direction of the vehicle body is a straight shape without bending. It has become. Further, the outer edge 16A in the vehicle width direction of the inner panel 16 is joined to the inner surface (back surface) 12A of the outer panel 12 by bonding or the like.
[0015]
As shown in FIG. 2, the inner panel 16 is disposed in the entire area between the inner panel 14 disposed at the front edge and the rear edge of the hood 10, and is viewed from the vehicle width direction (vehicle body side). The cross-sectional shape seen is also a straight shape with no curvature. The front edge 16B and the rear edge 16C of the inner panel 16 are joined to the inner surface (back surface) 12A of the outer panel 12 by bonding or the like.
[0016]
Next, the operation of this embodiment will be described.
[0017]
In the present embodiment, when the colliding body S collides with the hood 10 and the outer panel 12 attempts to reverse from the convex shape swelled above the vehicle body to the concave shape swelled below the vehicle body, it is joined to the back surface of the outer panel 12 and is flat. The inner panel 16 thus made tries to prevent the outer panel 12 from reversing from a convex shape to a concave shape by a pulling force from the beginning of the collision.
[0018]
As a result, the substantial collision of the collision body S after colliding with the outer panel 12 is eliminated, and the collision load quickly rises. For this reason, the impact absorption efficiency of the hood 10 can be improved.
[0019]
In the present embodiment, the inner panel 16 can reduce the amount of deformation of the entire hood 10 downward in the vehicle body. For this reason, it is possible to reduce the possibility that the inner panel 16 collides with a member such as the engine below.
[0020]
In the present embodiment, the inner panel 16 is disposed at a central portion in the vehicle width direction of the hood 10 with a predetermined width W (W ≧ 300 mm). Instead, as shown in FIG. You may arrange | position in the whole surface of the food | hood 10 containing the outer peripheral part inside the outer panel 12. FIG. Although not shown, a plurality of inner panels 16 may be arranged on the inner side of the outer panel 12 in the vehicle longitudinal direction, in a direction inclined in the vehicle width direction with respect to the vehicle longitudinal direction, or along the vehicle width direction. good.
[0021]
Next, a second embodiment of the vehicle hood structure according to the present invention will be described with reference to FIGS.
[0022]
In addition, the same member as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.
[0023]
As shown in FIG. 5, in this embodiment, the inner panel 16 is disposed at the center in the vehicle width direction of the hood 10 with a predetermined width W (W ≧ 300 mm), and has a cross-sectional shape viewed from the front-rear direction of the vehicle body. It has a curved shape that bulges down the car body. Further, the outer edge 16A in the vehicle width direction of the inner panel 16 is joined to the inner surface (back surface) 12A of the outer panel 12 by bonding or the like.
[0024]
As shown in FIG. 6, the inner panel 16 is disposed in the entire area between the inner panel 14 disposed at the front edge and the rear edge of the hood 10, and is viewed from the vehicle width direction (vehicle body side). The viewed cross-sectional shape is a curved surface that swells downward from the vehicle body. The front edge 16B and the rear edge 16C of the inner panel 16 are joined to the inner surface (back surface) 12A of the outer panel 12 by bonding or the like.
[0025]
Next, the operation of this embodiment will be described.
[0026]
In the present embodiment, when the collision body S collides with the hood 10 and the outer panel 12 tries to reverse from the convex shape that swells upward to the concave shape that swells downward of the vehicle body, the outer body 12 is joined to the back surface of the outer panel 12. The inner panel 16 having a curved shape bulging downward tries to prevent the outer panel 12 from reversing from a convex shape to a concave shape due to a pulling force from the beginning of the collision.
[0027]
As a result, the substantial collision of the collision body S after colliding with the outer panel 12 is eliminated, and the collision load quickly rises. For this reason, the impact absorption efficiency of the hood 10 can be improved.
[0028]
In the present embodiment, the inner panel 16 can reduce the amount of deformation of the entire hood 10 downward in the vehicle body. For this reason, it is possible to reduce the possibility that the inner panel 16 collides with a member such as the engine below.
[0029]
Although not illustrated in the present embodiment, the inner panel 16 may be disposed on the entire surface of the hood 10 including the outer peripheral portion inside the outer panel 12. Although not shown, a plurality of inner panels 16 may be arranged on the inner side of the outer panel 12 in the vehicle longitudinal direction, in a direction inclined in the vehicle width direction with respect to the vehicle longitudinal direction, or along the vehicle width direction. good.
[0030]
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.
[0031]
【The invention's effect】
The vehicle hood structure according to the first aspect of the present invention includes an outer panel that forms a vehicle body outer side surface of the hood and has a curved surface that swells above the vehicle body, and an inner panel that is joined to the back surface of the outer panel to form a flat plate. Therefore, it has an excellent effect of improving the impact absorption efficiency. Moreover, it has the outstanding effect that the possibility that an inner panel may collide with members, such as a lower engine, secondarily will also be reduced.
[0032]
According to a second aspect of the present invention, there is provided a hood structure for a vehicle according to the present invention, comprising an outer panel that forms the outer surface of the hood and a curved surface that bulges upward from the vehicle body; Therefore, the impact absorption efficiency can be improved. Moreover, it has the outstanding effect that the possibility that an inner panel may collide with members, such as a lower engine, secondarily will also be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view taken along line 1-1 of FIG.
FIG. 2 is a cross-sectional view taken along line 2-2 of FIG.
FIG. 3 is a plan view showing the vehicle hood structure according to the first embodiment of the present invention.
FIG. 4 is a cross-sectional view corresponding to FIG. 1 showing a vehicle hood structure according to a modification of the first embodiment of the present invention.
FIG. 5 is a cross-sectional view corresponding to FIG. 1, showing a vehicle hood structure according to a second embodiment of the present invention.
FIG. 6 is a cross-sectional view corresponding to FIG. 2 showing a vehicle hood structure according to a second embodiment of the present invention.
[Explanation of symbols]
10 Hood 12 Hood outer panel 16 Hood inner panel

Claims (2)

フードの車体外側面を構成すると共に車体上方に膨らんだ曲面とされたアウタパネルと、
前記アウタパネルの裏面に接合され平板とされたインナパネルと、を有することを特徴とする車両用フード構造。
An outer panel that forms the outer surface of the body of the hood and is a curved surface that swells above the vehicle body;
A vehicular hood structure, comprising: an inner panel joined to the back surface of the outer panel.
フードの車体外側面を構成すると共に車体上方に膨らんだ曲面とされたアウタパネルと、
前記アウタパネルの裏面に接合され、車体下方に膨らんだ曲面とされたインナパネルと、を有することを特徴とする車両用フード構造。
An outer panel that forms the outer surface of the body of the hood and is a curved surface that swells above the vehicle body;
A vehicle hood structure comprising: an inner panel joined to the back surface of the outer panel and having a curved surface that swells downward from the vehicle body.
JP2003206152A 2003-08-06 2003-08-06 Hood structure for vehicle Pending JP2005053265A (en)

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Application Number Title Priority Date Filing Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7140673B2 (en) * 2003-10-27 2006-11-28 Toyota Jidosha Kabushiki Kaisha Hood structure for vehicle
JP2010184558A (en) * 2009-02-12 2010-08-26 Mazda Motor Corp Front body structure of vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7140673B2 (en) * 2003-10-27 2006-11-28 Toyota Jidosha Kabushiki Kaisha Hood structure for vehicle
JP2010184558A (en) * 2009-02-12 2010-08-26 Mazda Motor Corp Front body structure of vehicle

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