JP2004249807A - Skeleton structure of car body - Google Patents

Skeleton structure of car body Download PDF

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Publication number
JP2004249807A
JP2004249807A JP2003041286A JP2003041286A JP2004249807A JP 2004249807 A JP2004249807 A JP 2004249807A JP 2003041286 A JP2003041286 A JP 2003041286A JP 2003041286 A JP2003041286 A JP 2003041286A JP 2004249807 A JP2004249807 A JP 2004249807A
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Japan
Prior art keywords
front side
side member
vertical wall
vehicle
width direction
Prior art date
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JP2003041286A
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Japanese (ja)
Inventor
Akiyoshi Watanabe
明義 渡辺
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Toyota Motor Corp
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Toyota Motor Corp
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Publication date
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Priority to JP2003041286A priority Critical patent/JP2004249807A/en
Publication of JP2004249807A publication Critical patent/JP2004249807A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To surely break a prescribed part in a skeleton member in a vehicle collision with a simple constitution. <P>SOLUTION: A front side member upper 30 and a front side member lower 32 are not welded in a deforming part 12D of a front side member 12 required to be deformed in the vehicle collision. A reinforcing rib 34 of the front side member upper 30 and a reinforcing rib 36 of the front side member lower 32 are mutually extended in the same direction. Both an intersection between the reinforcing rib 34 and a vertical wall part of the front side member upper 30 and an intersection between the reinforcing rib 36 and a vertical wall part of the front side member lower 32 are not set. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は車体の骨格構造に係り、詳しくは自動車等の車体において衝突時に破壊させたい部位を確実に破壊するための車体の骨格構造に関する。
【０００２】
【従来の技術】
従来、車体の骨格構造においては、骨格構造としてのフロントサイドメンバに車体前方からの入力荷重により曲げ変形を促進する曲げ促進部を設け、車両衝突時に、フロントサイドメンバが曲げ促進部を起点に破壊することで、エネルギ吸収量を増大させる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２００１−３０１６４８号公報
【０００４】
【発明が解決しようとする課題】
しかしながら、このような車体の骨格構造においては、車両衝突時に、フロントサイドメンバにおける所定の部位を確実に破壊するため、曲げ促進部をフロントサイドメンバの肉厚分布の変化や特別な湾曲部の設定等によって行っている。この結果、骨格部材の構成が複雑になる。
【０００５】
本発明は上記事実を考慮し、簡単な構成で、車両衝突時に骨格部材における所定の部位を確実に破壊できる車体の骨格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記載の本発明は、骨格部材の軸線方向に沿って分割された複数の構成部材を互いに接合して形成した車体の骨格構造であって、
前記骨格部材における変形させたい部位を除いて形成された前記構成部材同士の結合部と、
前記複数の構成部材に形成された補強用リブと、
を有し、
前記複数の構成部材に形成された各補強用リブは前記骨格部材における変形させたい部位において、互いに同方向に延設されており且つ前記骨格部材の縦壁部との交差点を持たないことを特徴とする。
【０００７】
従って、車両衝突時に骨格部材における変形させたい部位においては、骨格部材の軸線方向に沿って分割された複数の構成部材同士の結合部が無く、更に、複数の構成部材に形成された各補強用リブは、互いに同方向に延設されており且つ骨格部材の縦壁部との交差点を持たない。この結果、骨格部材における変形させたい部位の強度が他の部位の強度に比べて低くなり、また、接合を廃止することで変形部周辺の接合を破断させることなく、車両衝突時に骨格部材における変形させたい部位のみを確実に破壊できる。また、骨格部材における変形させたい部位において、肉厚分布の変化や特別な湾曲部の設定等を行っていないため、骨格部材の構成が複雑になることはない。このため、簡単な構成で、車両衝突時に骨格部材における所定の部位を確実に破壊できる。
【０００８】
【発明の実施の形態】
本発明における車体の骨格構造の一実施形態を図１〜図７に従って説明する。
【０００９】
なお、図中矢印ＦＲは車体前方方向を、矢印ＩＮは車幅内側方向を、矢印ＵＰは車体上方方向を示す。
【００１０】
図１に示される如く、本実施形態における自動車車体１０の前部の車幅方向両端下部近傍には、車体前後方向に延設された骨格部材としてのフロントサイドメンバ１２が配設されており、これらのフロントサイドメンバ１２は車体前後方向に延びる閉断面構造とされている。また、フロントサイドメンバ１２の前端部１２Ａには、アルミの押出し材で構成されたフロントサイドメンバフロント１３とクラッシュボックス１４を介してバンパリインフォースメント１６が取付けられている。
【００１１】
フロントサイドメンバ１２の後部１２Ｂは、車幅方向外側に膨出されており、後部１２Ｂの車幅方向外側縁部１２Ｃは、左右のロッカ１８の前部１８Ａに連結されている。また、フロントサイドメンバ１２の後部１２Ｂの車幅方向内側部１２Ｆには、車体後方からフロアアンダメンバ２０の前部２０Ａが挿入され結合されている。
【００１２】
フロントサイドメンバ１２の後部１２Ｂの車体前方側に隣接する部位は、平面視において、車体前方外側から車体後方内側へ傾斜した傾斜部１２Ｅとなっている。また、左右のフロントサイドメンバ１２における傾斜部１２Ｅと後部１２Ｂには、フロントサスペンションメンバ２２が架設されている。
【００１３】
図２に示される如く、フロントサスペンションメンバ２２の車幅方向両端部は、それぞれ車体前側上方に延設された前側取付脚部２２Ａと、車体後方へ延設された後側取付脚部２２Ｂとの二又に分岐されており、フロントサスペンションメンバ２２は、前側取付脚部２２Ａと後側取付脚部２２Ｂとにおいてフロントサイドメンバ１２の下部に取付けられている。
【００１４】
図１に示される如く、フロントサイドメンバ１２における傾斜部１２Ｅの前部領域Ｍは変形部位１２Ｄとなっており、車両前突時には、変形部位１２Ｄが起点となって、フロントサイドメンバ１２が図１に二点鎖線で示すように車幅方向外側へ曲げ変形するようになっている。
【００１５】
図３に示される如く、フロントサイドメンバ１２は、軸線方向（車体前後方向）に沿って上下２つに分割されており、フロントサイドメンバ１２の上部を構成する構成部材としてのフロントサイドメンバアッパ３０と、フロントサイドメンバ１２の下部を構成する構成部材としてのフロントサイドメンバロア３２とで構成されている。なお、フロントサイドメンバアッパ３０とフロントサイドメンバロア３２は、アルミの鋳造部品とされている。
【００１６】
フロントサイドメンバアッパ３０の車体前後方向から見た断面形状は、開口部を下方に向けたコ字状となっており、コ字状内部には、補強リブ３４が形成されている。また、フロントサイドメンバロア３２の車体前後方向から見た断面形状は、開口部を上方に向けたコ字状となっており、コ字状内部には、補強リブ３６が形成されている。
【００１７】
図５及び図７に示される如く、フロントサイドメンバアッパ３０の補強リブ３４は複数形成されており、これらの補強リブ３４はフロントサイドメンバアッパ３０の車幅方向外側縦壁部３０Ａと車幅方向内側縦壁部３０Ｂとを連結している。
【００１８】
なお、フロントサイドメンバ１２における変形部位１２Ｄにおいては、補強リブ３４とフロントサイドメンバアッパ３０の車幅方向外側縦壁部３０Ａとの交差点Ｐ１及び補強リブ３４とフロントサイドメンバアッパ３０の車幅方向内側縦壁部３０Ｂとの交差点Ｐ２は設定されていない。
【００１９】
図６及び図８に示される如く、フロントサイドメンバロア３２の補強リブ３６は複数形成されており、これらの補強リブ３６はフロントサイドメンバロア３２の車幅方向外側縦壁部３２Ａと車幅方向内側縦壁部３２Ｂとを連結している。
【００２０】
なお、フロントサイドメンバ１２における変形部位１２Ｄにおいては、補強リブ３６とフロントサイドメンバロア３２の車幅方向外側縦壁部３２Ａとの交差点Ｐ３及び補強リブ３６とフロントサイドメンバロア３２の車幅方向内側縦壁部３２Ｂとの交差点Ｐ４は設定されていない。
【００２１】
更に、フロントサイドメンバ１２における変形部位１２Ｄを除く部位においては、図３に示される如く、フロントサイドメンバアッパ３０の車幅方向外側縦壁部３０Ａの下端縁部３０Ｃと、フロントサイドメンバロア３２の車幅方向外側縦壁部３２Ａの上端縁部３２ＣとがＭＩＧ溶接等によって溶着され結合部４０となっており、フロントサイドメンバアッパ３０の車幅方向内側縦壁部３０Ｂの下端縁部３０Ｄと、フロントサイドメンバロア３２の車幅方向内側縦壁部３２Ａの上端縁部３２ＤとがＭＩＧ溶接等によって溶着され結合部４２となっている。
【００２２】
一方、図４に示される如く、フロントサイドメンバ１２における変形部位１２Ｄにおいては、フロントサイドメンバアッパ３０の車幅方向外側縦壁部３０Ａの下端縁部３０Ｃと、フロントサイドメンバロア３２の車幅方向外側縦壁部３２Ａの上端縁部３２Ｃとは溶着されていない。また、フロントサイドメンバ１２における変形部位１２Ｄにおいては、フロントサイドメンバアッパ３０の車幅方向内側縦壁部３０Ｂの下端縁部３０Ｄと、フロントサイドメンバロア３２の車幅方向内側縦壁部３２Ａの上端縁部３２Ｄとは溶着されていない。
【００２３】
また、図５及び図６に示される如く、フロントサイドメンバ１２における変形部位１２Ｄにおいては、フロントサイドメンバアッパ３０の補強リブ３４と、フロントサイドメンバロア３２の補強リブ３６とが、互いに同方向、本実施形態では、車体前方内側から車体後方外側方向（矢印Ａ方向）に向かって延設されている。
【００２４】
次に、本実施形態の作用を説明する。
【００２５】
本実施形態では、車両衝突時に、特に、車体前突時に変形させたいフロントサイドメンバ１２の変形部位１２Ｄにおいては、図４に示される如く、フロントサイドメンバアッパ３０の車幅方向外側縦壁部３０Ａの下端縁部３０Ｃと、フロントサイドメンバロア３２の車幅方向外側縦壁部３２Ａの上端縁部３２Ｃとが溶着されておらず、フロントサイドメンバアッパ３０の車幅方向内側縦壁部３０Ｂの下端縁部３０Ｄと、フロントサイドメンバロア３２の車幅方向内側縦壁部３２Ａの上端縁部３２Ｄとが溶着されていない。
【００２６】
また、図５及び図６に示される如く、フロントサイドメンバ１２における変形部位１２Ｄにおいては、フロントサイドメンバアッパ３０の補強リブ３４と、フロントサイドメンバロア３２の補強リブ３６とが、互いに同方向、本実施形態では、車体前方内側から車体後方外側方向（矢印Ａ方向）に向かって延設されている。
【００２７】
また、フロントサイドメンバ１２の変形部位１２Ｄにおいては、補強リブ３４とフロントサイドメンバアッパ３０の車幅方向外側縦壁部３０Ａとの交差点Ｐ１及び補強リブ３４とフロントサイドメンバアッパ３０の車幅方向内側縦壁部３０Ｂとの交差点Ｐ２は設定されておらず、補強リブ３６とフロントサイドメンバロア３２の車幅方向外側縦壁部３２Ａとの交差点Ｐ３及び補強リブ３６とフロントサイドメンバロア３２の車幅方向内側縦壁部３２Ｂとの交差点Ｐ４も設定されていない。
【００２８】
この結果、本実施形態では、フロントサイドメンバ１２の変形部位１２Ｄの強度が、他の部位の強度に比べて低くなっている。このため、車両前突時には、フロントサイドメンバ１２への入力によって、図４に二点鎖線で示すように、変形部位１２Ｄにおいて、フロントサイドメンバ１２の縦壁部の変形がはじまり、変形部位１２Ｄが起点となって、フロントサイドメンバ１２が図１に二点鎖線で示すように車幅方向外側へ曲げ変形するので、フロントサイドメンバ１２の変形ストロークを充分に確保することができ、衝突性能が向上する。
【００２９】
また、車両前突時には、フロントサイドメンバ１２への入力によって、図４に二点鎖線で示すように、変形部位１２Ｄにおいてフロントサイドメンバ１２の縦壁部が破断するが、変形部位１２Ｄの前後の部位においては、フロントサイドメンバアッパ３０の車幅方向外側縦壁部３０Ａの下端縁部３０Ｃと、フロントサイドメンバロア３２の車幅方向外側縦壁部３２Ａの上端縁部３２Ｃとが溶着され結合部４０となっており、フロントサイドメンバアッパ３０の車幅方向内側縦壁部３０Ｂの下端縁部３０Ｄと、フロントサイドメンバロア３２の車幅方向内側縦壁部３２Ａの上端縁部３２Ｄとが溶着され結合部４２となっているため、フロントサイドメンバ１２の縦壁部の破断が変形部位１２Ｄから車体前後方向、特に車体後方へ広がるのを防止できる。
【００３０】
また、本実施形態では、フロントサイドメンバ１２の変形部位１２Ｄにおいて、肉厚分布の変化や特別な湾曲部の設定等を行っていないため、フロントサイドメンバ１２の構成が複雑になることはない。
【００３１】
このため、本実施形態では、簡単な構成で、車両衝突時にフロントサイドメンバ１２の変形部位１２Ｄを確実に破壊できる。
【００３２】
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り、例えば、上記実施形態では、骨格部材としてのフロントサイドメンバ１２を軸線方向（車体前後方向）に沿って上下２つに分割したが、フロントサイドメンバ１２を軸線方向（車体前後方向）に沿って３つ以上に分割した構成としても良い。また、フロントサイドメンバ１２を構成するフロントサイドメンバアッパ３０とフロントサイドメンバロア３２の形状及び材質も上記実施形態に限定されない。また、骨格部材はフロントサイドメンバ１２に限定されない。
【００３３】
【発明の効果】請求項１記載の本発明は、骨格部材の軸線方向に沿って分割された複数の構成部材を互いに接合して形成した車体の骨格構造であって、前記骨格部材における変形させたい部位を除いて形成された前記構成部材同士の結合部と、複数の構成部材に形成された補強用リブと、を有し、複数の構成部材に形成された各補強用リブは骨格部材における変形させたい部位において、互いに同方向に延設されており且つ骨格部材の縦壁部との交差点を持たないため、簡単な構成で、車両衝突時に骨格部材における所定の部位を確実に破壊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】本発明の一実施形態に係る車体の骨格構造を示す概略平面図である。
【図２】本発明の一実施形態に係る車体の骨格構造を示す概略側断面図である。
【図３】図１の３−３線に沿った拡大断面図である。
【図４】図１の４−４線に沿った拡大断面図である。
【図５】本発明の一実施形態に係る車体の骨格構造のフロントサイドメンバアッパを示す平面図である。
【図６】本発明の一実施形態に係る車体の骨格構造のフロントサイドメンバロアを示す平面図である。
【図７】本発明の一実施形態に係る車体の骨格構造のフロントサイドメンバアッパを示す車体前方斜め内側上方から見た斜視図である。
【図８】本発明の一実施形態に係る車体の骨格構造のフロントサイドメンバロアを示す車体前方斜め内側上方から見た斜視図である。
【符号の説明】
１２ フロントサイドメンバ（骨格部材）
１２Ｄ フロントサイドメンバの変形部位
３０ フロントサイドメンバアッパ（構成部材）
３２ フロントサイドメンバロア（構成部材）
３４ 補強リブ
３６ 補強リブ
４０ 結合部
４２ 接合部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a skeleton structure of a vehicle body, and more particularly, to a skeleton structure of a vehicle body for surely destroying a portion to be destroyed in a collision in a vehicle body such as an automobile.
[0002]
[Prior art]
Conventionally, in a skeletal structure of a vehicle body, a bending promoting portion for promoting bending deformation by an input load from the front of the vehicle body is provided on a front side member as a skeletal structure, and the front side member is broken starting from the bending promoting portion at the time of a vehicle collision. By doing so, a configuration for increasing the amount of energy absorption is known (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2001-301648 A
[Problems to be solved by the invention]
However, in such a frame structure of the vehicle body, in order to surely destroy a predetermined portion of the front side member at the time of a vehicle collision, the bending promoting portion is provided with a change in the thickness distribution of the front side member or a special curved portion. And so on. As a result, the structure of the skeleton member becomes complicated.
[0005]
The present invention has been made in view of the above circumstances, and has as its object to provide a skeleton structure of a vehicle body that can reliably destroy a predetermined portion of a skeleton member at the time of a vehicle collision with a simple configuration.
[0006]
[Means for Solving the Problems]
The present invention according to claim 1 is a skeleton structure of a vehicle body formed by joining a plurality of constituent members divided along an axial direction of the skeleton member to each other,
A joining portion between the constituent members formed except for a portion to be deformed in the skeleton member,
Reinforcing ribs formed on the plurality of components,
Has,
Each of the reinforcing ribs formed on the plurality of constituent members extends in the same direction at a portion of the skeleton member to be deformed, and does not have an intersection with a vertical wall portion of the skeleton member. And
[0007]
Therefore, at a portion of the skeletal member to be deformed at the time of a vehicle collision, there is no connecting portion between the plurality of constituent members divided along the axial direction of the skeletal member, and further, each reinforcing member formed on the plurality of constituent members is not provided. The ribs extend in the same direction and do not have an intersection with the vertical wall of the skeletal member. As a result, the strength of the portion of the skeletal member that is desired to be deformed is lower than the strength of the other portions, and the abolition of the joint does not break the joint around the deformed portion. Only the part to be made can be reliably destroyed. Further, since the thickness distribution and the setting of the special curved portion are not performed at the portion of the skeletal member to be deformed, the configuration of the skeletal member does not become complicated. Therefore, a predetermined portion of the skeletal member can be reliably destroyed at the time of a vehicle collision with a simple configuration.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of a skeleton structure of a vehicle body according to the present invention will be described with reference to FIGS.
[0009]
In the drawings, an arrow FR indicates a forward direction of the vehicle body, an arrow IN indicates an inward direction of the vehicle width, and an arrow UP indicates an upward direction of the vehicle body.
[0010]
As shown in FIG. 1, a front side member 12 as a frame member extending in the vehicle front-rear direction is disposed near a lower portion of both ends in the vehicle width direction at the front of the vehicle body 10 in the present embodiment, These front side members 12 have a closed sectional structure extending in the vehicle front-rear direction. A bumper reinforcement 16 is attached to a front end 12A of the front side member 12 via a front side member front 13 made of extruded aluminum and a crash box 14.
[0011]
A rear portion 12B of the front side member 12 bulges outward in the vehicle width direction, and a vehicle width direction outer edge 12C of the rear portion 12B is connected to front portions 18A of the left and right rockers 18. A front portion 20A of the floor under member 20 is inserted from the rear of the vehicle body and connected to an inner portion 12F of the rear portion 12B of the front side member 12 from the rear of the vehicle body.
[0012]
A portion adjacent to the rear portion 12B of the front side member 12 on the vehicle body front side is an inclined portion 12E that is inclined from the vehicle body front outer side to the vehicle body rear inner side in plan view. A front suspension member 22 is provided on the inclined portion 12E and the rear portion 12B of the left and right front side members 12.
[0013]
As shown in FIG. 2, both ends in the vehicle width direction of the front suspension member 22 are formed by a front mounting leg 22A extending upward on the front side of the vehicle body and a rear mounting leg 22B extending rearward of the vehicle body. The front suspension member 22 is bifurcated, and the front suspension member 22 is attached to a lower portion of the front side member 12 at a front attachment leg 22A and a rear attachment leg 22B.
[0014]
As shown in FIG. 1, the front region M of the inclined portion 12E of the front side member 12 is a deformed portion 12D, and at the time of a vehicle front collision, the deformed portion 12D is a starting point, and the front side member 12 As shown by a two-dot chain line in FIG.
[0015]
As shown in FIG. 3, the front side member 12 is divided into upper and lower parts along the axial direction (the front-rear direction of the vehicle body), and a front side member upper 30 as a constituent member constituting the upper part of the front side member 12. And a front side member lower 32 as a constituent member constituting a lower portion of the front side member 12. The front side member upper 30 and the front side member lower 32 are cast parts of aluminum.
[0016]
The cross-sectional shape of the front side member upper 30 as viewed from the vehicle front-rear direction is a U-shape with an opening directed downward, and a reinforcing rib 34 is formed inside the U-shape. The cross-sectional shape of the front side member lower 32 as viewed from the vehicle front-rear direction is a U-shape with an opening directed upward, and a reinforcing rib 36 is formed inside the U-shape.
[0017]
As shown in FIGS. 5 and 7, a plurality of reinforcing ribs 34 of the front side member upper 30 are formed, and these reinforcing ribs 34 are formed in the vehicle width direction outer vertical wall portion 30A of the front side member upper 30 and the vehicle width direction. It connects to the inner vertical wall 30B.
[0018]
In the deformed portion 12D of the front side member 12, the intersection P1 between the reinforcing rib 34 and the outer lateral wall portion 30A in the vehicle width direction of the front side member upper 30, and the inner side in the vehicle width direction of the reinforcing rib 34 and the front side member upper 30. The intersection P2 with the vertical wall 30B is not set.
[0019]
As shown in FIGS. 6 and 8, a plurality of reinforcing ribs 36 of the front side member lower 32 are formed, and the reinforcing ribs 36 are formed in the vehicle width direction outer vertical wall portion 32A of the front side member lower 32 and the vehicle width direction. The inner vertical wall portion 32B is connected.
[0020]
In the deformed portion 12D of the front side member 12, the intersection P3 between the reinforcing rib 36 and the outer vertical wall portion 32A in the vehicle width direction of the front side member lower 32 and the inner side in the vehicle width direction of the reinforcing rib 36 and the front side member lower 32. The intersection P4 with the vertical wall portion 32B is not set.
[0021]
Further, as shown in FIG. 3, at a portion of the front side member 12 excluding the deformed portion 12D, as shown in FIG. 3, a lower end edge portion 30C of the vehicle width direction outer vertical wall portion 30A of the front side member upper 30 and a front side member lower portion 32 are formed. The upper edge portion 32C of the vehicle width direction outer vertical wall portion 32A is welded by MIG welding or the like to form a connection portion 40, and the lower edge portion 30D of the vehicle width direction inner vertical wall portion 30B of the front side member upper 30; The upper side edge portion 32D of the vehicle width direction inner vertical wall portion 32A of the front side member lower 32 is welded by MIG welding or the like to form a joint portion 42.
[0022]
On the other hand, as shown in FIG. 4, in the deformed portion 12 </ b> D of the front side member 12, the lower end edge 30 </ b> C of the outer vertical wall portion 30 </ b> A in the vehicle width direction of the front side member upper 30 and the vehicle width direction of the front side member lower 32. It is not welded to the upper edge 32C of the outer vertical wall 32A. Further, in the deformed portion 12D of the front side member 12, the lower end edge 30D of the vehicle width direction inner vertical wall portion 30B of the front side member upper 30 and the upper end of the vehicle width direction inner vertical wall portion 32A of the front side member lower 32. It is not welded to the edge 32D.
[0023]
As shown in FIGS. 5 and 6, at the deformed portion 12 </ b> D of the front side member 12, the reinforcing rib 34 of the front side member upper 30 and the reinforcing rib 36 of the front side member lower 32 are in the same direction. In the present embodiment, the extending portion extends from the front inner side of the vehicle body toward the rear outer side direction (the direction of arrow A).
[0024]
Next, the operation of the present embodiment will be described.
[0025]
In the present embodiment, as shown in FIG. 4, in the deformed portion 12 </ b> D of the front side member 12 that is to be deformed at the time of a vehicle collision, particularly at the time of a vehicle front collision, the vehicle width direction outer vertical wall portion 30 </ b> A of the front side member upper 30 is provided. Is not welded to the lower end edge 30C of the front side member lower 32 and the upper end edge 32C of the vehicle width direction outer vertical wall portion 32A of the front side member lower 32, and the lower end of the vehicle width direction inner vertical wall portion 30B of the front side member upper 30 is not welded. The edge 30D and the upper edge 32D of the inner vertical wall 32A of the front side member lower 32 in the vehicle width direction are not welded.
[0026]
As shown in FIGS. 5 and 6, at the deformed portion 12 </ b> D of the front side member 12, the reinforcing rib 34 of the front side member upper 30 and the reinforcing rib 36 of the front side member lower 32 are in the same direction. In the present embodiment, the extending portion extends from the front inner side of the vehicle body toward the rear outer side direction (the direction of arrow A).
[0027]
Also, at the deformed portion 12D of the front side member 12, the intersection P1 between the reinforcing rib 34 and the outer lateral wall portion 30A in the vehicle width direction of the front side member upper 30, and the inner side in the vehicle width direction of the reinforcing rib 34 and the front side member upper 30. The intersection P2 with the vertical wall portion 30B is not set, and the intersection P3 between the reinforcing rib 36 and the outer vertical wall portion 32A in the vehicle width direction of the front side member lower 32 and the vehicle width of the reinforcing rib 36 and the front side member lower 32. The intersection P4 with the direction inner side vertical wall portion 32B is not set.
[0028]
As a result, in the present embodiment, the strength of the deformed portion 12D of the front side member 12 is lower than the strength of the other portions. Therefore, at the time of a vehicle front collision, the input to the front side member 12 causes the deformation of the vertical wall portion of the front side member 12 to start at the deformed portion 12D, as indicated by the two-dot chain line in FIG. As a starting point, the front side member 12 bends and deforms outward in the vehicle width direction as shown by a two-dot chain line in FIG. 1, so that the deformation stroke of the front side member 12 can be sufficiently ensured and the collision performance is improved. I do.
[0029]
In addition, at the time of a vehicle front collision, the vertical wall portion of the front side member 12 is broken at the deformed portion 12D by the input to the front side member 12 as shown by a two-dot chain line in FIG. At the part, the lower end edge 30C of the vehicle width direction outer vertical wall portion 30A of the front side member upper 30 and the upper end edge 32C of the vehicle width direction outer vertical wall portion 32A of the front side member lower 32 are welded and joined. The lower edge 30D of the vehicle width direction inner vertical wall portion 30B of the front side member upper 30 and the upper edge 32D of the vehicle width direction inner vertical wall portion 32A of the front side member lower 32 are welded. The connecting portion 42 prevents breakage of the vertical wall portion of the front side member 12 from spreading from the deformed portion 12D in the vehicle front-rear direction, particularly in the vehicle rear. Kill.
[0030]
Further, in the present embodiment, since the change in the thickness distribution and the setting of the special curved portion are not performed in the deformed portion 12D of the front side member 12, the configuration of the front side member 12 is not complicated.
[0031]
For this reason, in the present embodiment, the deformed portion 12D of the front side member 12 can be reliably destroyed at the time of a vehicle collision with a simple configuration.
[0032]
In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to such an embodiment, and various other embodiments are possible within the scope of the present invention. It is obvious to those skilled in the art that, for example, in the above-described embodiment, the front side member 12 as the skeletal member is divided into two upper and lower parts along the axial direction (vehicle longitudinal direction). It may be configured to be divided into three or more along the direction (vehicle longitudinal direction). In addition, the shapes and materials of the front side member upper 30 and the front side member lower 32 constituting the front side member 12 are not limited to the above-described embodiment. Further, the skeletal member is not limited to the front side member 12.
[0033]
According to the first aspect of the present invention, there is provided a skeleton structure of a vehicle body formed by joining a plurality of structural members divided along an axial direction of the skeleton member, wherein the skeleton member is deformed. It has a connecting portion between the constituent members formed except for a desired portion, and a reinforcing rib formed on a plurality of constituent members, and each reinforcing rib formed on the plurality of constituent members is a skeleton member. Since the portions to be deformed extend in the same direction as each other and do not have intersections with the vertical wall portions of the skeletal member, it is possible to reliably destroy a predetermined portion of the skeletal member at the time of a vehicle collision with a simple configuration. Has excellent effects.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a skeleton structure of a vehicle body according to an embodiment of the present invention.
FIG. 2 is a schematic side sectional view showing a skeleton structure of a vehicle body according to an embodiment of the present invention.
FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG.
FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 1;
FIG. 5 is a plan view showing a front side member upper having a vehicle body skeleton structure according to an embodiment of the present invention.
FIG. 6 is a plan view showing a front side member lower of the frame structure of the vehicle body according to the embodiment of the present invention.
FIG. 7 is a perspective view of the front side member upper having the skeleton structure of the vehicle body according to the embodiment of the present invention, as viewed obliquely from the upper front inside the vehicle body.
FIG. 8 is a perspective view showing the front side member lower of the skeleton structure of the vehicle body according to the embodiment of the present invention, as viewed from obliquely inward front and upper side of the vehicle body.
[Explanation of symbols]
12 Front side member (frame member)
12D Deformation part 30 of front side member 30 Front side member upper (component)
32 Front side member lower (component)
34 reinforcement rib 36 reinforcement rib 40 joint 42 joint

Claims (1)

骨格部材の軸線方向に沿って分割された複数の構成部材を互いに接合して形成した車体の骨格構造であって、
前記骨格部材における変形させたい部位を除いて形成された前記構成部材同士の結合部と、
前記複数の構成部材に形成された補強用リブと、
を有し、
前記複数の構成部材に形成された各補強用リブは前記骨格部材における変形させたい部位において、互いに同方向に延設されており且つ前記骨格部材の縦壁部との交差点を持たないことを特徴とする車体の骨格構造。A skeleton structure of a vehicle body formed by joining a plurality of constituent members divided along an axial direction of the skeleton member to each other,
A joining portion between the constituent members formed except for a portion to be deformed in the skeleton member,
Reinforcing ribs formed on the plurality of components,
Has,
Each of the reinforcing ribs formed on the plurality of constituent members extends in the same direction at a portion of the skeleton member to be deformed, and does not have an intersection with a vertical wall portion of the skeleton member. The skeletal structure of the car body.
JP2003041286A 2003-02-19 2003-02-19 Skeleton structure of car body Withdrawn JP2004249807A (en)

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Publication Number Publication Date
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008247291A (en) * 2007-03-30 2008-10-16 Mitsubishi Motors Corp Vehicle body structure
JP2010076762A (en) * 2009-11-27 2010-04-08 Kobe Steel Ltd Frame of welded structure with closed section
US7694982B2 (en) 2007-12-15 2010-04-13 Hyundai Motor Company Sub frame for vehicle
KR101769278B1 (en) * 2015-12-18 2017-08-21 주식회사 성우하이텍 Front side rear member
KR20180068801A (en) * 2016-12-14 2018-06-22 현대자동차주식회사 Front side rear member
US10053151B2 (en) 2015-12-25 2018-08-21 Toyota Jidosha Kabushiki Kaisha Reinforcing structure of vehicle frame member
EP3431345A1 (en) * 2017-07-20 2019-01-23 Faurecia Interior Systems India Pvt. Ltd. Impact energy absorber for a vehicle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008247291A (en) * 2007-03-30 2008-10-16 Mitsubishi Motors Corp Vehicle body structure
US7694982B2 (en) 2007-12-15 2010-04-13 Hyundai Motor Company Sub frame for vehicle
JP2010076762A (en) * 2009-11-27 2010-04-08 Kobe Steel Ltd Frame of welded structure with closed section
KR101769278B1 (en) * 2015-12-18 2017-08-21 주식회사 성우하이텍 Front side rear member
US10053151B2 (en) 2015-12-25 2018-08-21 Toyota Jidosha Kabushiki Kaisha Reinforcing structure of vehicle frame member
KR20180068801A (en) * 2016-12-14 2018-06-22 현대자동차주식회사 Front side rear member
KR101886111B1 (en) * 2016-12-14 2018-08-07 현대자동차 주식회사 Front side rear member
EP3431345A1 (en) * 2017-07-20 2019-01-23 Faurecia Interior Systems India Pvt. Ltd. Impact energy absorber for a vehicle

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