JP2010208605A - Vehicular body front structure - Google Patents

Vehicular body front structure Download PDF

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JP2010208605A
JP2010208605A JP2009060079A JP2009060079A JP2010208605A JP 2010208605 A JP2010208605 A JP 2010208605A JP 2009060079 A JP2009060079 A JP 2009060079A JP 2009060079 A JP2009060079 A JP 2009060079A JP 2010208605 A JP2010208605 A JP 2010208605A
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vehicle body
width direction
front side
collision
vehicle width
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Shigeru Inamori
茂 稲森
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To improve energy absorption performance at the time of offset collision. <P>SOLUTION: An under member 20 made of FRP is arranged under the front part of a vehicular body. Right and left front side members 12 made of the FRP are each connected by a connection part 20H onto the end parts 20A on both sides of the under member 20 in a vehicle width direction. Continuous fibers S1 for forming the under member 20 are oriented so as to connect a bumper reinforce extension 34 combined with a front bumper reinforcement 16 and the right and left front side members 12 obliquely with respect to the longitudinal direction of the vehicle body, thereby transferring a load component in the vehicle width direction at the time of the offset collision. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、樹脂と繊維との複合材を用いた車体前部構造に関する。   The present invention relates to a vehicle body front structure using a composite material of resin and fiber.

従来、繊維強化プラスチック（以下、ＦＲＰという）で形成されたフロントサイドメンバを有する車体前部構造が開示されている（例えば、特許文献１参照）。このフロントサイドメンバは、軸方向からの入力荷重により入力端側から逐次圧壊を起こす筒状断面のＦＲＰ製エネルギー吸収部と、このエネルギー吸収部に連なりＦＲＰで形成されて車体部品と接合される支持部と、からなり、エネルギー吸収部はフロントサイドメンバの長手方向とそれに直角な方向とに等分に強化繊維が配向され、支持部は等方性を持って強化繊維が配向されている。   Conventionally, a vehicle body front structure having a front side member formed of fiber reinforced plastic (hereinafter referred to as FRP) has been disclosed (for example, see Patent Document 1). The front side member has an FRP energy absorbing portion having a cylindrical cross-section that causes successive crushing from the input end side due to an input load from the axial direction, and a support that is connected to the vehicle body part by being formed of FRP connected to the energy absorbing portion. The energy absorbing portion is equally oriented with reinforcing fibers in the longitudinal direction of the front side member and the direction perpendicular thereto, and the supporting portion is oriented with reinforcing fibers with isotropic properties.

特開２００５−２７１８７５号公報JP 2005-271875 A

しかしながら、上記構成のような車体前部構造では、エネルギ吸収部の軸に対して車体斜め側方から衝突荷重が入力される斜め衝突時には、エネルギ吸収部の曲げ方向への入力が左右連結部材を介して他方のエネルギ吸収部にも分散して支持されるようになっているが、左右何れか一方のフロントサイドメンバのみに車体前方から車体後方に向かって衝突荷重が入力されるオフセット衝突時のエネルギ吸収に対しては改善の余地がある。   However, in the vehicle body front structure as described above, in the case of an oblique collision in which a collision load is input from an oblique side of the vehicle body with respect to the axis of the energy absorption unit, the input in the bending direction of the energy absorption unit causes the left and right coupling members to be input. It is designed to be distributed and supported by the other energy absorption part, but at the time of an offset collision in which a collision load is input from the front of the vehicle body to the rear of the vehicle body only to one of the left and right front side members. There is room for improvement in energy absorption.

本発明は上記事実を考慮し、オフセット衝突時のエネルギ吸収性能を向上できる車体前部構造を得ることが目的である。   An object of the present invention is to obtain a vehicle body front structure capable of improving the energy absorption performance at the time of an offset collision in consideration of the above facts.

請求項１に記載の発明の車体前部構造は、繊維と樹脂との複合材より成り、車体前部の車幅方向外側部に車体前後方向に延在された左右のフロントサイドメンバと、前記左右のフロントサイドメンバの前部を互いに連結すると共に、車幅方向への荷重成分を伝達可能とした配向の繊維と樹脂との複合材より成る荷重分散手段と、を有する。   The vehicle body front part structure of the invention according to claim 1 is composed of a composite material of fiber and resin, and the left and right front side members extending in the vehicle longitudinal direction at the vehicle width direction outer side part of the vehicle body front part, The front part of the left and right front side members are connected to each other, and has load distribution means made of a composite material of fiber and resin oriented so that a load component in the vehicle width direction can be transmitted.

車体がオフセット衝突した場合には、繊維と樹脂との複合材より成り、車体前部の車幅方向外側部に車体前後方向に延在された左右のフロントサイドメンバのうち衝突側のフロントサイドメンバが車体後方へ押される。これと同時に、左右のフロントサイドメンバを連結する荷重分散手段の衝突側も車体後方へ押される。この際、荷重分散手段は自身の圧壊と同時に、車幅方向への荷重成分を伝達可能とした配向の繊維によって、荷重を反衝突側のフロントサイドメンバに伝達することができる。この結果、左右のフロントサイドメンバと荷重分散手段とで衝突エネルギーを吸収することができるため、オフセット衝突時にエネルギ吸収性能が向上する。   When the vehicle body has an offset collision, the front side member on the collision side of the left and right front side members made of a composite material of fiber and resin and extending in the vehicle body front-rear direction at the vehicle width direction outer side of the vehicle body front portion Is pushed to the rear of the car body. At the same time, the collision side of the load distribution means that connects the left and right front side members is also pushed rearward of the vehicle body. At this time, the load dispersing means can transmit the load to the front side member on the anti-collision side simultaneously with the collapse of the load dispersing means by the fiber oriented so that the load component in the vehicle width direction can be transmitted. As a result, since the collision energy can be absorbed by the left and right front side members and the load distribution means, the energy absorption performance is improved during an offset collision.

以上説明したように、本発明の請求項１に係る車体前部構造では、オフセット衝突時のエネルギ吸収性能を向上できる。   As described above, the vehicle body front part structure according to claim 1 of the present invention can improve the energy absorption performance at the time of an offset collision.

本発明の第１実施形態に係る車体前部構造を示す車体斜め前方から見た斜視図である。It is the perspective view seen from the vehicle body diagonally front which shows the vehicle body front part structure which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る車体前部構造を示す車体斜め前方から見た分解斜視図である。It is the disassembled perspective view seen from the vehicle body diagonally front which shows the vehicle body front part structure which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る車体前部構造における繊維の配向の関係を示す説明図ある。It is explanatory drawing which shows the relationship of the orientation of the fiber in the vehicle body front part structure which concerns on 1st Embodiment of this invention. 図１の４−４断面線に沿った拡大断面図である。FIG. 4 is an enlarged cross-sectional view taken along a line 4-4 in FIG. 本発明の第１実施形態に係る車体前部構造における繊維の配向を示す説明図ある。It is explanatory drawing which shows the orientation of the fiber in the vehicle body front part structure which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る車体前部構造の図５に対応する作用説明図である。FIG. 6 is an operation explanatory diagram corresponding to FIG. 5 of the vehicle body front portion structure according to the first embodiment of the present invention. 本発明の第２実施形態に係る車体前部構造を示す図４に対応する断面図である。It is sectional drawing corresponding to FIG. 4 which shows the vehicle body front part structure which concerns on 2nd Embodiment of this invention.

［第１実施形態］ [First Embodiment]

以下、図１〜図６を用いて、本発明に係る車体前部構造の第１実施形態について説明する。なお、これらの図において適宜示される矢印ＵＰは車体上方方向を示し、矢印ＦＲは車体前方方向を示し、矢印ＩＮは車幅内側方向を示している。   Hereinafter, a first embodiment of a vehicle body front structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow UP appropriately shown indicates a vehicle body upward direction, an arrow FR indicates a vehicle body front direction, and an arrow IN indicates a vehicle width inside direction.

図１に示すように、本実施形態の車体前部構造１０は、車体前部の車幅方向外側部に車体前後方向に延在された骨格部材としての左右一対のフロントサイドメンバ１２を備えており、これらのフロントサイドメンバ１２は繊維と樹脂との複合材としてのＦＲＰで構成されている。また、各フロントサイドメンバ１２の後部１２Ａには、ダッシュパネル１４が架設されている。   As shown in FIG. 1, the vehicle body front structure 10 of the present embodiment includes a pair of left and right front side members 12 as skeleton members extending in the vehicle longitudinal direction at the vehicle width direction outer side of the vehicle body front. These front side members 12 are made of FRP as a composite material of fibers and resin. A dash panel 14 is installed on the rear portion 12 </ b> A of each front side member 12.

図４に示すように、フロントサイドメンバ１２の車体前後方向から見た断面形状は略矩形筒状とされている。   As shown in FIG. 4, the cross-sectional shape of the front side member 12 viewed from the front-rear direction of the vehicle body is a substantially rectangular cylinder.

図２に示すように、フロントサイドメンバ１２の前部１２Ｂの上下方向幅Ｈ１は、後部１２Ａの上下方向幅Ｈ２に比べて小さくなっており、フロントサイドメンバ１２の前部１２Ｂにおける下壁部１２Ｃの後部は車体下方へ向かって湾曲している。   As shown in FIG. 2, the vertical width H1 of the front portion 12B of the front side member 12 is smaller than the vertical width H2 of the rear portion 12A, and the lower wall portion 12C of the front portion 12B of the front side member 12 is. The rear part is curved downward in the vehicle body.

また、各フロントサイドメンバ１２の前端１２Ｄは、車体前端部に車幅方向に延在するフロントバンパリインフォースメント１６に図示を省略した締結部材によって連結されており、フロントバンパリインフォースメント１６は鉄等の金属で構成されている。   Further, the front end 12D of each front side member 12 is connected to a front bumper reinforcement 16 extending in the vehicle width direction by a fastening member (not shown) at the front end of the vehicle body. The front bumper reinforcement 16 is made of iron or the like. Consists of metal.

図１に示すように、車体前部の下部には荷重分散手段としてのアンダメンバ２０が配設されており、アンダメンバ２０は繊維と樹脂との複合材としてのＦＲＰで構成されている。また、アンダメンバ２０の車幅方向両端部２０Ａは、各フロントサイドメンバ１２の前部１２Ｂの下方に車体前後方向に延在している。   As shown in FIG. 1, an under member 20 as a load dispersing means is disposed at the lower part of the front part of the vehicle body, and the under member 20 is composed of FRP as a composite material of fibers and resin. Further, both end portions 20 </ b> A in the vehicle width direction of the under member 20 extend in the vehicle longitudinal direction below the front portion 12 </ b> B of each front side member 12.

図４に示すように、アンダメンバ２０の車幅方向両端部２０Ａの車体前後方向から見た断面形状は平板状の縦壁部２０Ｂと、この縦壁部２０Ｂの上端から車幅方向外側へ延設された上壁部２０Ｃとを備えている。   As shown in FIG. 4, the cross-sectional shape of the under member 20 as viewed from the front-rear direction of the vehicle body in the vehicle width direction both ends 20 </ b> A is a flat plate-shaped vertical wall portion 20 </ b> B and extends from the upper end of the vertical wall portion 20 </ b> B outward in the vehicle width direction. The upper wall portion 20C is provided.

図２に示すように、アンダメンバ２０の車幅方向両端部２０Ａにおける前部２０Ｄの上下方向幅Ｈ３は、後部２０Ｅの上下方向幅Ｈ４に比べて大きくなっている。   As shown in FIG. 2, the vertical width H3 of the front portion 20D at the vehicle width direction both ends 20A of the under member 20 is larger than the vertical width H4 of the rear portion 20E.

図４に示すように、アンダメンバ２０の車幅方向両端部２０Ａの前部２０Ｄでは上壁部２０Ｃが、フロントサイドメンバ１２の前部１２Ｂの下壁部１２Ｃに接着等により結合されている。   As shown in FIG. 4, the upper wall portion 20 </ b> C is joined to the lower wall portion 12 </ b> C of the front portion 12 </ b> B of the front side member 12 by bonding or the like at the front portion 20 </ b> D of both end portions 20 </ b> A in the vehicle width direction.

図１に示すように、アンダメンバ２０の車幅方向両端部２０Ａにおける後部２０Ｅはフロントサイドメンバ１２の前部１２Ｂと離間しており、アンダメンバ２０の車幅方向両端部２０Ａにおける後部２０Ｅとフロントサイドメンバ１２の前部１２Ｂとの間には隙間２１が形成されている。また、アンダメンバ２０の車幅方向両端部２０Ａにおける上壁部２０Ｃの後端には車体下方へ向かって延びる後壁部２０Ｆが形成されており、この後壁部２０Ｆがフロントサイドメンバ１２の前部１２Ｂにおける下壁部１２Ｃの後端部１２Ｅに接着等により結合されている。   As shown in FIG. 1, the rear portion 20E at the vehicle width direction both ends 20A of the under member 20 is separated from the front portion 12B of the front side member 12, and the rear portion 20E and the front side member at the vehicle width direction both ends 20A of the under member 20 are separated. A gap 21 is formed between the 12 front portions 12B. Further, a rear wall portion 20F extending downward from the vehicle body is formed at the rear end of the upper wall portion 20C at both end portions 20A in the vehicle width direction of the under member 20, and the rear wall portion 20F is a front portion of the front side member 12. 12B is joined to the rear end portion 12E of the lower wall portion 12C by adhesion or the like.

また、各フロントサイドメンバ１２の前端１２Ｄとアンダメンバ２０の車幅方向両端部２０Ａの前壁部２０Ｇとは面一となっている。また、左右のアンダメンバ２０の車幅方向両端部２０Ａにおける縦壁部２０Ｂの下端縁部は、連結部２０Ｈによって互いに連結され一体化している。アンダメンバ２０の連結部２０Ｈは車体前部の下方を覆う平板状のアンダーカバーとなっており、連結部２０Ｈの車体後方側の車幅方向中間部には、車体後方側から車体前方側に向かって切欠３０が形成されている。   Further, the front end 12D of each front side member 12 and the front wall portion 20G of both end portions 20A of the under member 20 in the vehicle width direction are flush with each other. Moreover, the lower end edge part of the vertical wall part 20B in the vehicle width direction both ends 20A of the left and right under members 20 is mutually connected and integrated by a connecting part 20H. The connecting part 20H of the under member 20 is a flat under cover that covers the lower part of the front part of the vehicle body. The intermediate part in the vehicle width direction on the vehicle body rear side of the connecting part 20H is directed from the vehicle body rear side toward the vehicle body front side. A notch 30 is formed.

フロントバンパリインフォースメント１６の下方側には、バンパリインフォースエクステンション３４が車幅方向に沿って延在しており、バンパリインフォースエクステンション３４は鉄等の金属で構成されている。また、バンパリインフォースエクステンション３４は車体前後方向から見て開口部を上方へ向けたコ字状に屈曲されており、車幅方向に延びる基部３４Ａと、基部３４Ａの車幅方向両端部から上方に延びる左右の延長部３４Ｂとを備えている。また、バンパリインフォースエクステンション３４の後壁部３４Ｃは、アンダメンバ２０の連結部２０Ｈの前端２０Ｊと、左右の車幅方向両端部２０Ａの前壁部２０Ｇとに当接している。   On the lower side of the front bumper reinforcement 16, a bumper reinforcement extension 34 extends in the vehicle width direction, and the bumper reinforcement extension 34 is made of a metal such as iron. The bumper reinforcement extension 34 is bent in a U-shape with the opening facing upward when viewed from the front-rear direction of the vehicle body, and extends upward from the base portion 34A extending in the vehicle width direction and both ends of the base portion 34A in the vehicle width direction. And left and right extensions 34B. Further, the rear wall portion 34C of the bumper reinforcement extension 34 is in contact with the front end 20J of the connecting portion 20H of the under member 20 and the front wall portions 20G of both the left and right vehicle width direction end portions 20A.

バンパリインフォースエクステンション３４の左右の延長部３４Ｂの上端３４Ｄはフロントバンパリインフォースメント１６の下面１６Ａの車幅方向両端部に溶接等により結合されている。   Upper ends 34D of the left and right extensions 34B of the bumper reinforcement extension 34 are joined to both ends of the lower surface 16A of the front bumper reinforcement 16 in the vehicle width direction by welding or the like.

図５には、アンダメンバ２０を構成するＦＲＰの繊維の配向とバンパリインフォースエクステンション３４及びフロントサイドメンバ１２との関係が車体上方から見た模式図で示されている。図５に示すように、アンダメンバ２０を構成するＦＲＰの連続した繊維Ｓ１の配向は、バンパリインフォースエクステンション３４と、アンダメンバ２０の車幅方向両端部２０Ａ及び左右のフロントサイドメンバ１２とを車体前後方向に対して斜めに繋ぐように配向されている。   FIG. 5 is a schematic view of the orientation of the FRP fibers constituting the under member 20 and the relationship between the bumper reinforcement extension 34 and the front side member 12 as viewed from above the vehicle body. As shown in FIG. 5, the orientation of the continuous fiber S1 of the FRP constituting the under member 20 is such that the bumper reinforcement extension 34, the vehicle width direction both ends 20A of the under member 20 and the left and right front side members 12 are arranged in the longitudinal direction of the vehicle body. It is oriented so as to connect diagonally.

図３には、図４におけるフロントサイドメンバ１２とアンダメンバ２０との接合部Ｐ１における、フロントサイドメンバ１２を構成するＦＲＰの繊維の配向とアンダメンバ２０を構成するＦＲＰの繊維の配向との関係が車体上方から見た模式図で示されている。図３に示すように、アンダメンバ２０の車幅方向両端部２０Ａにおける前部２０Ｄの上壁部２０Ｃと、フロントサイドメンバ１２の前部１２Ｂの下壁部１２Ｃとの接合部においては、アンダメンバ２０を構成するＦＲＰの連続した繊維Ｓ１の配向が、車体前後方向に対して斜めに配向されており、フロントサイドメンバ１２を構成する連続した繊維Ｓ２の配向が車体前後方向に配向されている。   3 shows the relationship between the orientation of the FRP fibers constituting the front side member 12 and the orientation of the FRP fibers constituting the under member 20 at the joint P1 between the front side member 12 and the under member 20 in FIG. It is shown in a schematic view seen from above. As shown in FIG. 3, at the joint portion between the upper wall portion 20 </ b> C of the front portion 20 </ b> D and the lower wall portion 12 </ b> C of the front portion 12 </ b> B of the front side member 12 at the vehicle width direction both ends 20 </ b> A. The orientation of the continuous fiber S1 of the constituting FRP is obliquely oriented with respect to the longitudinal direction of the vehicle body, and the orientation of the continuous fiber S2 constituting the front side member 12 is oriented in the longitudinal direction of the vehicle body.

なお、バンパリインフォースエクステンション３４の左右の延長部３４Ｂは、アンダメンバ２０の車幅方向両端部２０Ａにおける前部２０Ｄの上壁部２０Ｃと、フロントサイドメンバ１２の前部１２Ｂの下壁部１２Ｃとの接合部（Ｐ１）の車体前方側に配設されており、車体前部が衝突した場合には、バンパリインフォースエクステンション３４が接合部Ｐ１を直接車体後方へ押圧するようになっている。   The left and right extension portions 34B of the bumper reinforcement extension 34 are joined to the upper wall portion 20C of the front portion 20D and the lower wall portion 12C of the front portion 12B of the front side member 12 at both end portions 20A of the under member 20 in the vehicle width direction. When the front part of the vehicle body collides with the part (P1), the bumper reinforcement extension 34 directly presses the joint part P1 to the rear of the vehicle body.

従って、車体がオフセット衝突して、図６に二点鎖線で示すように、車体右前端部に車体前方から車体後方へ向かって荷重Ｆ１が作用し、フロントバンパリインフォースメント１６とバンパリインフォースエクステンション３４との右側部が車体後方側に変形した場合には、衝突側のフロントサイドメンバ１２が車体後方へ押されると同時に、アンダメンバ２０の衝突側の車幅方向両端部２０Ａも車体後方へ押されるようになっている。この際、アンダメンバ２０の連結部２０Ｈは自身の圧壊と同時に、車幅方向への荷重成分を伝達可能とした配向の繊維Ｓ１によって、荷重Ｆ１の一部Ｆ２をアンダメンバ２０の反衝突側の車幅方向両端部２０Ａと反衝突側のフロントサイドメンバ１２とに伝達することができるようになっている。   Therefore, the vehicle body offsets and a load F1 acts on the right front end of the vehicle body from the front of the vehicle body to the rear of the vehicle body, as shown by a two-dot chain line in FIG. 6, and the front bumper reinforcement 16 and the bumper reinforcement 34 When the right side portion of the undercarriage is deformed to the rear side of the vehicle body, the front side member 12 on the collision side is pushed rearward of the vehicle body, and at the same time, both end portions 20A in the vehicle width direction on the collision side of the undermember 20 are pushed rearward of the vehicle body. It has become. At this time, the connecting portion 20H of the under member 20 simultaneously compresses itself, and at the same time, the portion F2 of the load F1 is transferred to the vehicle width on the anti-collision side of the under member 20 by the fibers S1 oriented so that the load component in the vehicle width direction can be transmitted. It can be transmitted to the direction both ends 20A and the front side member 12 on the anti-collision side.

次に、本実施形態の作用を説明する。   Next, the operation of this embodiment will be described.

上記構成の車体前部構造１０が適用された自動車等の車体がオフセット衝突した場合、例えば、図６に示すように、車体右前端部に車体前方から車体後方へ向かって衝突荷重Ｆ１が作用した場合には、フロントバンパリインフォースメント１６とバンパリインフォースエクステンション３４との右側部が車体後方側に変形し、衝突側のフロントサイドメンバ１２が荷重Ｆ１の一部Ｆ３によって車体後方へ押される。このため、衝突側のフロントサイドメンバ１２に車体前後方向に沿った軸圧縮荷重が作用する。この軸圧縮荷重が所定値以上である場合、衝突側のフロントサイドメンバ１２は、衝突荷重Ｆ１の一部Ｆ３を支持しつつ前端側から逐次破壊（圧縮を受けて粉砕）される。これにより、オフセット衝突に伴う衝撃エネルギの一部が吸収され車体に伝達（支持）される荷重が緩和される。   When a vehicle body such as an automobile to which the vehicle body front structure 10 having the above configuration is applied has an offset collision, for example, as shown in FIG. 6, a collision load F1 acts on the vehicle body right front end portion from the vehicle body front to the vehicle rear. In this case, the right side portions of the front bumper reinforcement 16 and the bumper reinforcement extension 34 are deformed rearward of the vehicle body, and the front side member 12 on the collision side is pushed rearward of the vehicle body by a part F3 of the load F1. For this reason, the axial compression load along the front-rear direction of the vehicle body acts on the front side member 12 on the collision side. When this axial compression load is equal to or greater than a predetermined value, the front side member 12 on the collision side is sequentially broken (compressed and crushed) from the front end side while supporting a part F3 of the collision load F1. Thereby, a part of the impact energy accompanying the offset collision is absorbed and the load transmitted (supported) to the vehicle body is relieved.

また、これと同時に、アンダメンバ２０の衝突側の車幅方向両端部２０Ａと連結部２０Ｈの衝突側とが車体後方へ押され、アンダメンバ２０の衝突側の車幅方向両端部２０Ａと連結部２０Ｈの衝突側とに車体前後方向に沿った軸圧縮荷重が作用する。この軸圧縮荷重が所定値以上である場合、衝突側の車幅方向両端部２０Ａと連結部２０Ｈの衝突側は、衝突荷重Ｆ１の一部を支持しつつ前端側から逐次破壊（圧縮を受けて粉砕）される。これにより、オフセット衝突に伴う衝撃エネルギの一部が吸収され、車体に伝達（支持）される荷重が緩和される。   At the same time, the vehicle width direction both ends 20A on the collision side of the under member 20 and the collision side of the connecting portion 20H are pushed rearwardly, and the vehicle width direction both ends 20A and the connecting portion 20H of the under member 20 on the collision side are pushed. An axial compression load along the longitudinal direction of the vehicle body acts on the collision side. When this axial compression load is equal to or greater than a predetermined value, the collision side of the collision side vehicle width direction both ends 20A and the coupling portion 20H supports a part of the collision load F1 and sequentially breaks (under compression) from the front end side. Crushed). Thereby, a part of the impact energy accompanying the offset collision is absorbed, and the load transmitted (supported) to the vehicle body is relieved.

また、アンダメンバ２０の連結部２０Ｈは、自身の粉砕（圧壊）と同時に、車幅方向への荷重成分を伝達可能とした配向の繊維Ｓ１によって、荷重Ｆ１の一部Ｆ２を反衝突側のフロントサイドメンバ１２に伝達する。   In addition, the connecting portion 20H of the under member 20 allows the portion F2 of the load F1 to be transferred to the front side on the anti-collision side by the fibers S1 oriented so that the load component in the vehicle width direction can be transmitted simultaneously with the crushing (crushing) of the undermember 20 This is transmitted to the member 12.

さらに、バンパリインフォースエクステンション３４によっても、荷重Ｆ１の一部Ｆ４が反衝突側のフロントサイドメンバ１２に伝達される。   Further, the bumper reinforcement extension 34 also transmits a part F4 of the load F1 to the front side member 12 on the anti-collision side.

この結果、反衝突側のフロントサイドメンバ１２も車体後方へ押され、車体前後方向に沿った軸圧縮荷重が作用する。この軸圧縮荷重が所定値以上である場合、反衝突側のフロントサイドメンバ１２は、衝突荷重Ｆ１の一部Ｆ４を支持しつつ前端側から逐次破壊（圧縮を受けて粉砕）される。これにより、オフセット衝突に伴う衝撃エネルギの一部が吸収され、車体に伝達（支持）される荷重が緩和される。   As a result, the front side member 12 on the anti-collision side is also pushed to the rear of the vehicle body, and an axial compressive load along the longitudinal direction of the vehicle body acts. When this axial compression load is equal to or greater than a predetermined value, the front side member 12 on the anti-collision side is successively broken (compressed and crushed) from the front end side while supporting a part F4 of the collision load F1. Thereby, a part of the impact energy accompanying the offset collision is absorbed, and the load transmitted (supported) to the vehicle body is relieved.

従って、本実施形態では、オフセット衝突時のエネルギ吸収性能を向上できる。なお、車体左前端部に車体前方から車体後方へ向かって荷重が作用した場合にも同様にオフセット衝突時のエネルギ吸収性能を向上できる。   Therefore, in this embodiment, the energy absorption performance at the time of offset collision can be improved. Even when a load is applied from the front of the vehicle body to the rear of the vehicle body at the left front end of the vehicle body, the energy absorption performance at the time of an offset collision can be improved.

また、本実施形態では、アンダメンバ２０の連結部２０Ｈが車体前部の下方を覆う平板状のアンダーカバーとなっているため、連結部２０Ｈが空力カバーとして作用することで車体の空力性能を向上できる。さらに、アンダメンバ２０の連結部２０Ｈは剛性及び強度が高いため、高速走行時の垂れ下がりも少ない。   In the present embodiment, since the connecting portion 20H of the under member 20 is a flat under cover that covers the lower part of the front of the vehicle body, the aerodynamic performance of the vehicle body can be improved by the connecting portion 20H acting as an aerodynamic cover. . Further, since the connecting portion 20H of the under member 20 has high rigidity and strength, there is little drooping during high-speed traveling.

（第２の実施形態） (Second Embodiment)

次に、本発明の第２の実施形態に係る車体前部構造５０について、図７に従って説明する。なお、第１実施形態と同一部材に付いては、同一符号を付してその説明を省略する。   Next, a vehicle body front structure 50 according to a second embodiment of 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.

図７には、本実施形態における第１実施形態の図４に対応する断面図が示されている。図７に示すように、本実施形態の車体前部構造５０では、アンダメンバ２０における左右の車幅方向両端部２０Ａと連結部２０Ｈとがそれぞれ別部材で構成されており、こららの部材を互いに接着等によって結合することで、アンダメンバ２０を構成している。   FIG. 7 is a cross-sectional view corresponding to FIG. 4 of the first embodiment in the present embodiment. As shown in FIG. 7, in the vehicle body front structure 50 according to the present embodiment, the left and right vehicle width direction end portions 20A and the connecting portion 20H of the under member 20 are configured as separate members, and these members are connected to each other. The under member 20 is configured by bonding by bonding or the like.

従って、本実施形態に係る車体前部構造５０によっても、第１実施形態と同様にオフセット衝突時のエネルギ吸収性能を向上できる。   Therefore, the vehicle body front structure 50 according to the present embodiment can also improve the energy absorption performance at the time of an offset collision as in the first embodiment.

〔上記実施形態の補足説明〕   [Supplementary explanation of the above embodiment]

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。   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.

１０ 車体前部構造
１２ フロントサイドメンバ
１６ フロントバンパリインフォースメント
２０ アンダメンバ（荷重分散手段）
３４ バンパリインフォースエクステンション
５０ 車体前部構造 DESCRIPTION OF SYMBOLS 10 Vehicle body front part structure 12 Front side member 16 Front bumper reinforcement 20 Under member (load distribution means)
34 Bumper reinforcement 50 Car body front structure

Claims (1)

繊維と樹脂との複合材より成り、車体前部の車幅方向外側部に車体前後方向に延在された左右のフロントサイドメンバと、
前記左右のフロントサイドメンバの前部を互いに連結すると共に、車幅方向への荷重成分を伝達可能とした配向の繊維と樹脂との複合材より成る荷重分散手段と、
を有する車体前部構造。 Left and right front side members made of a composite material of fiber and resin, and extending in the vehicle longitudinal direction on the vehicle width direction outer side of the vehicle body front,
The load distribution means comprising a composite material of fiber and resin oriented to connect the front portions of the left and right front side members to each other and transmit a load component in the vehicle width direction;
A vehicle body front structure.
JP2009060079A 2009-03-12 2009-03-12 Vehicular body front structure Pending JP2010208605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009060079A JP2010208605A (en) 2009-03-12 2009-03-12 Vehicular body front structure

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Application Number Priority Date Filing Date Title
JP2009060079A JP2010208605A (en) 2009-03-12 2009-03-12 Vehicular body front structure

Publications (1)

Publication Number Publication Date
JP2010208605A true JP2010208605A (en) 2010-09-24

Family

ID=42969262

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Application Number Title Priority Date Filing Date
JP2009060079A Pending JP2010208605A (en) 2009-03-12 2009-03-12 Vehicular body front structure

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013023162A (en) * 2011-07-25 2013-02-04 Toyota Motor Corp Collision energy absorber structure of vehicle body
WO2015037443A1 (en) * 2013-09-10 2015-03-19 本田技研工業株式会社 Automobile body structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013023162A (en) * 2011-07-25 2013-02-04 Toyota Motor Corp Collision energy absorber structure of vehicle body
WO2015037443A1 (en) * 2013-09-10 2015-03-19 本田技研工業株式会社 Automobile body structure
JPWO2015037443A1 (en) * 2013-09-10 2017-03-02 本田技研工業株式会社 Auto body structure

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