JP2008247348A - Vehicle body frame structure - Google Patents

Vehicle body frame structure Download PDF

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JP2008247348A
JP2008247348A JP2007094602A JP2007094602A JP2008247348A JP 2008247348 A JP2008247348 A JP 2008247348A JP 2007094602 A JP2007094602 A JP 2007094602A JP 2007094602 A JP2007094602 A JP 2007094602A JP 2008247348 A JP2008247348 A JP 2008247348A
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vehicle
side member
vehicle body
front side
extending
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JP5026136B2 (en
Inventor
Takuo Nakamura
拓生 中村
Hayamizu Nakagawa
速水 中川
Katsuhiko Takashina
克彦 高階
Hiroaki Kano
宏明 加納
Junichi Yanase
純一 柳瀬
Hiroyuki Kiyono
裕之 清野
Hideki Ito
秀樹 伊藤
Tetsushi Yanagimoto
哲史 柳本
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Mitsubishi Motors Corp
MA Aluminum Corp
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Mitsubishi Aluminum Co Ltd
Mitsubishi Motors Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame structure capable of enhancing the rigidity of a vehicle body against an upward and downward force while maintaining energy absorbing efficiency from a front. <P>SOLUTION: This vehicle body frame structure 1 comprises a floor frame part 20 having right and left side sills 21 and right and left floor side members 20, a front frame part 30 arranged at a front part of a compartment and having an upper member part 31, a lower member part 34, right and left front member parts 36 and a dash cross member upper 14 extending in a vehicle width direction between right and left front pillar lowers 12, a front side member rear 50 connecting a front end of the floor side member 22 and the upper member part 31 at a rear part of the front member part 36, and a connection member 60 extending in an upward and downward direction of the vehicle body and connecting the front side member rear 50 and the dash cross member upper 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、自動車の車室前方及び車室下部に配される車体フレーム構造に関する。   The present invention relates to a vehicle body frame structure disposed in front of a vehicle compartment and in a lower portion of the vehicle compartment.

自動車の車体前部の車体フレーム構造として、左右の前輪の頭頂部とほぼ同じ高さに位置する左右のアッパフレームと、フロア部分とほぼ同じ高さに位置する左右のシャシメンバに加え、前輪の中心軸とほぼ同じ高さにおいて車体前後方向へ延びる左右のフロントサイドメンバが配置されたものが知られている（例えば特許文献１参照）。この左右のフロントサイドメンバの車幅方向内側にエンジン及びトランスミッションが配置される。このようなフレーム構造では最大操舵時に前輪がフロントサイドメンバと干渉する場合があるため、衝突エネルギー吸収性能の向上と操舵角を考慮して、前輪がフロントメンバ部よりも車幅方向内側へ進入できる空間を形成し、フロントメンバ部が中心領域とエンジン及びトランスミッションとの間を通らないようなレイアウトにする技術が提供されている（例えば特許文献２参照）。この車体フレーム構造は、前輪の中心軸より上方に位置し、フロントピラーロアより車両前方に延びるアッパメンバ部と、前記前輪の中心軸より下方に位置し、フロアの前端部より車両前方に延びるロアメンバ部と、前記前輪より前方で結合する結合部と、前記結合部より車両前方に延びるフロントメンバ部とを備えている。このような車体フレーム構造において、衝突等の際に車体前方から入力される力は、左右のフロントメンバ部からアッパメンバ部及びロアメンバ部に分散して入力される。
特許第２８９０９３８号公報 特開２００６−１４３１７８号公報 As the body frame structure of the front part of the car body, in addition to the left and right upper frames located at the same height as the tops of the left and right front wheels, the left and right chassis members located at the same height as the floor part, the center of the front wheel There is known a structure in which left and right front side members extending in the longitudinal direction of the vehicle body are arranged at substantially the same height as the shaft (see, for example, Patent Document 1). An engine and a transmission are disposed inside the left and right front side members in the vehicle width direction. In such a frame structure, the front wheel may interfere with the front side member at the time of maximum steering, so that the front wheel can enter the vehicle width direction inner side than the front member portion in consideration of improved collision energy absorption performance and the steering angle. There has been provided a technique for forming a space so that a front member portion does not pass between a central region and an engine and a transmission (see, for example, Patent Document 2). The vehicle body frame structure is located above the center axis of the front wheel and extends from the front pillar lower to the front of the vehicle, and the lower member portion is located below the center axis of the front wheel and extends from the front end of the floor to the front of the vehicle. A coupling portion coupled in front of the front wheel, and a front member portion extending forward of the vehicle from the coupling portion. In such a vehicle body frame structure, the force input from the front of the vehicle body in the event of a collision or the like is distributed and input from the left and right front member portions to the upper member portion and the lower member portion.
Japanese Patent No. 2890938 JP 2006-143178 A

しかしながら、上述した車体フレーム構造では、次のような事情があった。すなわち、車体には前方からの衝突以外にも上下方向などの様々な力が入力されるため、車体上下方向の力に対する剛性と、衝突等における前方からのエネルギー吸収効率とを両立することが求められる。   However, the above-described body frame structure has the following circumstances. In other words, since various forces in the vertical direction are input to the vehicle body in addition to the collision from the front, it is required to satisfy both the rigidity against the force in the vertical direction of the vehicle and the energy absorption efficiency from the front in the collision and the like. It is done.

そこで、本発明は、衝突等による前方からのエネルギーの吸収効率を維持しつつ、上下方向の力に対する車体の剛性を高めるフレーム構造を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a frame structure that increases the rigidity of a vehicle body against a vertical force while maintaining energy absorption efficiency from the front due to a collision or the like.

本発明の一形態にかかる車体フレーム構造は、車室下部に配され、車幅方向両端部に配されたフロントピラから車体後方に延びる左右のサイドシルと、前記サイドシルよりも車幅方向内側において車体前後方向に延びる左右のフロアサイドメンバと、を有して構成されるフロアフレーム部と、車室前方に配され、前輪の中心軸より上方に位置し、前記フロントピラより車両前方に延びるアッパメンバ部と、前記前輪の中心軸より下方に位置し、前記フロアフレーム部の前方で車両前方に延びるロアメンバ部と、前記アッパメンバ部と前記ロアメンバ部とがこれらの前方で結合される結合部より車両前方に延びるフロントメンバ部と、左右の前記フロントピラの間で車幅方向に延びるダッシュクロスメンバアッパとを有して構成されるフロントフレーム部と、前記フロントメンバ部の後方において前記フロアサイドメンバの前端部と前記アッパメンバ部とを連結するフロントサイドメンバリヤと、車体上下方向に延び、前記フロントサイドメンバリヤと前記ダッシュクロスメンバアッパとを連結する連結部材と、を備えたことを特徴とする。   A vehicle body frame structure according to an embodiment of the present invention includes a left and right side sill that is disposed in a lower part of a vehicle compartment and extends from a front pillar disposed at both ends of the vehicle width direction to the rear of the vehicle body, and a vehicle body on the vehicle width direction inner side than the side sill. A floor frame portion having left and right floor side members extending in the front-rear direction, and an upper member portion disposed in front of the passenger compartment and positioned above the center axis of the front wheel and extending forward of the vehicle from the front pillar. And a lower member portion that is positioned below the center axis of the front wheel and extends forward of the vehicle in front of the floor frame portion, and a joint portion in which the upper member portion and the lower member portion are coupled in front of these. Front comprising a front member portion extending and a dash cross member upper extending in the vehicle width direction between the left and right front pillars A ram part, a front side member rear connecting the front end part of the floor side member and the upper member part behind the front member part, and extending in the vehicle body vertical direction, connecting the front side member rear and the dash cross member upper. And a connecting member.

本発明の一形態にかかる車体フレーム構造は、前記連結部材は、相異なる方向を向く複数の板状部材を一体に備えて構成され、その下端部が前記フロントサイドメンバリヤに接合されるとともにその上端部が前記ダッシュクロスメンバアッパに接合されていることを特徴とする。   In the vehicle body frame structure according to one aspect of the present invention, the connecting member is configured by integrally including a plurality of plate-like members facing different directions, and a lower end portion thereof is joined to the front side member rear and an upper end thereof. The portion is joined to the upper part of the dash cross member.

本発明の一形態にかかる車体フレーム構造は、前記ダッシュクロスメンバアッパは、車幅方向中央において左右に水平に延びる中央部と、この中央部の左右両端から上方かつ左右外側方向に傾斜してそれぞれ延びる傾斜部と、左右の前記傾斜部の左右端部から車幅方向外側に向かって水平に延びる左右の端部とを一体に備え、前記フロントサイドメンバリヤは前記フロントサイドメンバアッパから後方に水平に延びる前部と、該前部から後下方向、かつ、車幅内側に向かって斜めに延びる斜中間部と、該斜中間部の後端から後方、かつ、車幅内側に向かって略水平に延びる後部とを一体に有し、前記連結部材は、前記ダッシュクロスメンバアッパの前記傾斜部の下端近傍と前記フロントサイドメンバリヤの前記斜中間部の上端近傍を連結することを特徴とする。   In the vehicle body frame structure according to one aspect of the present invention, the dash cross member upper includes a central portion extending horizontally to the left and right at the center in the vehicle width direction, and inclined upward and laterally outward from the left and right ends of the central portion. An extending inclined portion and left and right end portions horizontally extending from the left and right end portions of the left and right inclined portions toward the vehicle width direction outer side are integrally provided, and the front side member rear is horizontally rearward from the front side member upper. A front part extending from the front part, a rearward downward direction from the front part, and an oblique intermediate part extending obliquely toward the inner side of the vehicle width; and a rear side from the rear end of the oblique intermediate part and substantially horizontally toward the inner side of the vehicle width The connecting member integrally connects the vicinity of the lower end of the inclined portion of the dash cross member upper and the vicinity of the upper end of the oblique intermediate portion of the front side member rear. And wherein the door.

本発明の一形態にかかる車体フレーム構造は、前記フロントピラにはスプリングハウスが一体に形成され、前記フロントメンバリヤの前端部は前記フロントメンバ部の延長線上後方における前記スプリングハウスの下方に接合されていることを特徴とする。   In the vehicle body frame structure according to one aspect of the present invention, a spring house is integrally formed with the front pillar, and a front end portion of the front member rear is joined to the lower side of the spring house on the rear side of the extension line of the front member portion. It is characterized by.

本発明は、上記構成により、衝突等による前方からのエネルギーの吸収効率を維持しつつ、上下方向の力に対する車体の剛性を高めることができる。   According to the present invention, the rigidity of the vehicle body against the force in the vertical direction can be increased while maintaining the energy absorption efficiency from the front due to a collision or the like.

以下、本発明の一実施形態にかかる車体フレーム構造について、図１乃至図５を参照して説明する。なお、自動車の進行方向Ｆを基準に前方（前側）、後方（後側）、左右幅方向を定義し、自動車の幅方向の中心に向かう方向を内方向（内側）、自動車の中心から幅方向に広がる方向を外方向（外側）とする。重力の作用する方向を下方向（下側）、重力に逆らう方向を上方向（上側）とする。図中矢印Ｘ、Ｙ及びＺは直交する３方向を示し、矢印Ｘは車体前方、矢印Ｙは車幅方向左側、矢印Ｚは車体上方向を指している。また、左右で同様な構成については適宜説明を省略する。   Hereinafter, a vehicle body frame structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. In addition, forward (front side), rear (rear side), left and right width directions are defined with reference to the traveling direction F of the vehicle, the direction toward the center of the width direction of the vehicle is inward (inside), and the width direction from the center of the vehicle The direction that spreads out is defined as the outward direction (outside). The direction in which gravity acts is the downward direction (lower side), and the direction against gravity is the upward direction (upper side). In the figure, arrows X, Y and Z indicate three orthogonal directions, arrow X indicates the front of the vehicle body, arrow Y indicates the vehicle width direction left side, and arrow Z indicates the vehicle body upward direction. Also, the description of the same configuration on the left and right is omitted as appropriate.

図１は、本実施形態にかかる自動車（車両）の車体フレーム構造の一部を示している。図１、図２及び図３に示すように、左右のフロントピラアッパ１１の下部にそれぞれ形成された左右のフロントピラ１２の間に車幅方向に向かって延びるカウルトップ１３が設けられ、且つ、ダッシュクロスメンバアッパ１４、ダッシュクロスメンバロア１５が設置されている。カウルトップ１３はフロントピラ１２の上部に配され、車幅方向中央部分が前方に向かうように湾曲している。ダッシュクロスメンバアッパ１４はカウルトップ１３よりも下方に配置され、車幅方向中央部分が下方となるように湾曲形成されている。ダッシュクロスメンバアッパ１４は、車幅方向中央において左右に水平に延びる水平中央部１４ａと、この水平中央部１４ａの左右両端から緩やかなカーブを介して上方かつ左右外側方向に傾斜してそれぞれ延びる傾斜部１４ｂと、左右の傾斜部１４ｂの左右端部から緩やかなカーブを介してさらに車幅方向外側に向かって水平に延びる水平端部１４ｃとを備えている。ダッシュクロスメンバアッパ１４は、左右の水平端部１４ｃにおいて、左右のフロントピラ１２に取り付けられている。   FIG. 1 shows a part of a body frame structure of an automobile (vehicle) according to the present embodiment. As shown in FIGS. 1, 2, and 3, a cowl top 13 extending in the vehicle width direction is provided between the left and right front pillars 12 respectively formed at the lower portions of the left and right front pillar uppers 11, and A dash cross member upper 14 and a dash cross member lower 15 are installed. The cowl top 13 is arranged at the upper part of the front pillar 12 and is curved so that the center part in the vehicle width direction is directed forward. The dash cross member upper 14 is disposed below the cowl top 13 and is curved so that the central portion in the vehicle width direction is downward. The dash cross member upper 14 has a horizontal central portion 14a extending horizontally left and right at the center in the vehicle width direction, and an inclination extending obliquely upward and laterally outward from the left and right ends of the horizontal central portion 14a via gentle curves. Part 14b and a horizontal end part 14c extending horizontally from the left and right end parts of the left and right inclined parts 14b to the outside in the vehicle width direction through a gentle curve. The dash cross member upper 14 is attached to the left and right front pillars 12 at the left and right horizontal ends 14c.

ダッシュクロスメンバロア１５はダッシュクロスメンバアッパ１４よりも下方に配され、フロントピラ１２の下部から内側に向かって延出している。ダッシュクロスメンバロア１５の内側端面１５ａは前方から後方に向かって内側に向かう斜面を形成している。なお、中空部材の端面とは、中空部の周りの外周部分の端面を指している。   The dash cross member lower 15 is disposed below the dash cross member upper 14, and extends inward from the lower portion of the front pillar 12. The inner end surface 15a of the dash cross member lower 15 forms a slope that faces inward from the front to the rear. Note that the end surface of the hollow member refers to the end surface of the outer peripheral portion around the hollow portion.

左右のフロントピラ１２の下部から、車体後方に向けてサイドシル２１が夫々延びている。サイドシル２１の後端部は後輪（不図示）より手前に位置する。サイドシル２１よりも内側においてフロアサイドメンバ２２がダッシュクロスメンバロア１５の内側の端部に接続され車体後方に向かって延びている。車幅方向中央部分にはバックボーン２３が車体前後方向に延びている。   Side sills 21 extend from the lower portions of the left and right front pillars 12 toward the rear of the vehicle body. The rear end of the side sill 21 is positioned in front of the rear wheel (not shown). Inside the side sill 21, the floor side member 22 is connected to the inner end of the dash cross member lower 15 and extends toward the rear of the vehicle body. A backbone 23 extends in the longitudinal direction of the vehicle body at the center in the vehicle width direction.

左右のサイドシル２１の間には、車幅方向に延びる各種クロスメンバ２４，２５，２６が設けられている。ダッシュクロスメンバロア１５及び各種クロスメンバ２４，２５，２６の外側の端面は左右のサイドシル２１の内側壁面２１ａに溶接などにより接合されている。   Various cross members 24, 25, 26 extending in the vehicle width direction are provided between the left and right side sills 21. The outer end surfaces of the dash cross member lower 15 and the various cross members 24, 25, and 26 are joined to the inner wall surfaces 21a of the left and right side sills 21 by welding or the like.

後輪の手前に配されたクロスメンバ２６にフロアサイドメンバ２２及びバックボーン２３の後端部が接合されている。各種クロスメンバ２４，２５，２６の下面と、フロアサイドメンバ２２の上面とは交差する部分においてそれぞれ溶接などにより接合されている。またクロスメンバ２４、２５の内側の端面はバックボーンサイドパネル２７を介してバックボーン２３に接続されている。   The rear end portions of the floor side member 22 and the backbone 23 are joined to a cross member 26 disposed in front of the rear wheel. The lower surfaces of the various cross members 24, 25 and 26 and the upper surface of the floor side member 22 are joined by welding or the like at the intersecting portions. Further, the inner end surfaces of the cross members 24 and 25 are connected to the backbone 23 via the backbone side panel 27.

これら前後方向に延びるサイドシル２１、フロアサイドメンバ２２及びバックボーン２３と、車幅方向に延びるダッシュクロスメンバロア１５及び各種クロスメンバ２４〜２６とが互いに交差してラダー状に組み合わされ、フロアフレーム部２０を構成している。このフロアフレーム部２０の上部に、車室の床を形成するフロアパネル（不図示）が溶接等により固定される。   The side sill 21, the floor side member 22 and the backbone 23 extending in the front-rear direction, the dash cross member lower 15 and the various cross members 24 to 26 extending in the vehicle width direction are combined with each other in a ladder shape, and the floor frame 20 Is configured. A floor panel (not shown) that forms the floor of the passenger compartment is fixed to the upper portion of the floor frame portion 20 by welding or the like.

フロアフレーム部２０や後述するフロントフレーム部３０を構成する各種フレーム材１３〜１５、２１〜２６、３６、４２等は、例えばアルミニウム合金などの軽合金塊から長方体状に形成された押出成形部材からなり、その断面形状は例えば中空部を有する四角形状に構成され、一定の閉断面で長手方向に連続している。湾曲形状のカウルトップ１３やダッシュクロスメンバアッパ１４、はその断面形状が連続する範囲で曲げ変形されて構成される。   The various frame materials 13-15, 21-26, 36, 42, etc. constituting the floor frame portion 20 and the front frame portion 30 described later are formed by extrusion from a light alloy lump such as an aluminum alloy, for example. It consists of a member, and the cross-sectional shape is formed in, for example, a quadrangular shape having a hollow portion, and is continuous in the longitudinal direction with a constant closed cross section. The curved cowl top 13 and the dash cross member upper 14 are configured to be bent and deformed as long as their cross-sectional shapes are continuous.

フロントピラアッパ１１の下端とフロアフレーム部２０の車幅方向端部とを繋ぐ左右のフロントピラ１２はアルミダイカスト材などの軽合金鋳物で構成されている。フロントピラ１２の前端部から連続するように、図３に破線で示す前輪Ｗの中心軸Ｃより上方において車体前方かつ下方に向かって湾曲して延びるフロントサイドメンバアッパ３１（アッパメンバ部）が設けられている。フロントサイドメンバアッパ３１の後端面とフロントピラ１２の前端面とは接合されている。フロントサイドメンバアッパ３１はアルミダイキャスト材などの軽合金鋳物で構成されている。フロントサイドメンバアッパ３１の後部内側面に、スプリングハウス３２が車体内部方向側に突出するように一体形成されて突出部分を構成している。このスプリングハウス３２よりも前方かつ下方におけるフロントサイドメンバアッパ３１の内側面にフェンダーシールドパネル３３が内側方向に突出して一体形成され、突出部分を構成する。   The left and right front pillars 12 that connect the lower end of the front pillar upper 11 and the end of the floor frame portion 20 in the vehicle width direction are made of a light alloy casting such as an aluminum die cast material. A front side member upper 31 (upper member portion) is provided so as to continue from the front end portion of the front pillar 12 so as to bend and extend toward the front and downward of the vehicle body above the center axis C of the front wheel W indicated by a broken line in FIG. ing. The rear end surface of the front side member upper 31 and the front end surface of the front pillar 12 are joined. The front side member upper 31 is made of a light alloy casting such as an aluminum die-cast material. A spring house 32 is integrally formed on the inner surface of the rear portion of the front side member upper 31 so as to protrude toward the inside of the vehicle body to form a protruding portion. A fender shield panel 33 protrudes inward and is integrally formed on the inner side surface of the front side member upper 31 in front of and below the spring house 32 to constitute a protruding portion.

前輪Ｗの中心軸Ｃより下方でフロアフレーム部２０とほぼ同じ高さにおいて、ダッシュクロスメンバロア１５の外側両端部近傍から車体前方に向かって連続して延びるフロントサイドメンバロア３４（ロアメンバ部）が設けられている。フロントサイドメンバロア３４は、左右の車体前方延出部分３４ａが車幅方向内側に向かって湾曲し、互いに近接する部分において連結され、平面視においてＨ字状となるようにアルミダイカスト材などの軽合金鋳物で一体形成されている。フロントサイドメンバアッパ３１の下方であって、フロントサイドメンバロア３４の湾曲部分の外側に形成された左右の空間Ｓに前輪Ｗが配置される。   A front side member lower 34 (lower member portion) continuously extending from the vicinity of both outer ends of the dash cross member lower 15 toward the front of the vehicle body at a level substantially lower than the center axis C of the front wheel W and the floor frame portion 20. Is provided. The front side member lower 34 is formed of a light-weight material such as an aluminum die-cast material so that the left and right vehicle body front extending portions 34a are curved inward in the vehicle width direction and are connected at portions close to each other. It is integrally formed with an alloy casting. The front wheels W are arranged in the left and right spaces S formed below the front side member upper 31 and outside the curved portion of the front side member lower 34.

フロントサイドメンバアッパ３１の前端部とフロントサイドメンバロア３４の前端部とは、前輪Ｗよりも前方に配される結合部３５において例えば溶接により結合されている。図２に示すように、平面視において、結合部３５付近の形状はＹ字状になっている。左右の結合部３５の前方には、車体前方に向けて延びるフロントサイドメンバ（フロントメンバ部）３６がそれぞれ設けられている。結合部３５の前端部とフロントサイドメンバ３６の後端部とは、それぞれに設けられたフランジ部を介して溶接又はボルト締めにより固定されている。   The front end portion of the front side member upper 31 and the front end portion of the front side member lower 34 are coupled by, for example, welding at a coupling portion 35 disposed in front of the front wheel W. As shown in FIG. 2, the shape in the vicinity of the coupling portion 35 is Y-shaped in plan view. Front side members (front member portions) 36 extending toward the front of the vehicle body are provided in front of the left and right coupling portions 35, respectively. The front end portion of the coupling portion 35 and the rear end portion of the front side member 36 are fixed by welding or bolting via flange portions provided respectively.

フロントサイドメンバ３６の前方には車体前方に向けて延びるクラッシュボックス３９が設けられている。フロントサイドメンバ３６の前端部とクラッシュボックス３９の後端部とは、それぞれに設けられたフランジ部４０、４１を介して溶接又はボルト締めにより固定されている。クラッシュボックス３９は車両が低速度で衝突した際に軸圧潰することで、衝突のエネルギーを吸収し、クラッシュボックス３９より後方の部分が損傷を防ぐ機能を有する。   A crash box 39 that extends toward the front of the vehicle body is provided in front of the front side member 36. The front end portion of the front side member 36 and the rear end portion of the crash box 39 are fixed by welding or bolting via flange portions 40 and 41 provided respectively. The crash box 39 has a function of absorbing the collision energy by collapsing the shaft when the vehicle collides at a low speed, and the portion behind the crash box 39 prevents damage.

左右のクラッシュボックス３９の前端部の間に車幅方向に延びるフロントバンパービーム４２が設けられている。フロントバンパービーム４２は左右のクラッシュボックス３９や更にその後方にあるフロントサイドメンバアッパ３１やフロントサイドメンバロア３４等の左右の各種フレーム部材３１に衝突のエネルギーを振り分ける機能を有する。   A front bumper beam 42 extending in the vehicle width direction is provided between the front end portions of the left and right crash boxes 39. The front bumper beam 42 has a function of distributing collision energy to the left and right crash boxes 39 and the left and right frame members 31 such as the front side member upper 31 and the front side member lower 34 located behind the crash box 39.

カウルトップ１３、ダッシュクロスメンバアッパ１４、フロントサイドメンバアッパ３１、フロントサイドメンバロア３４、フロントサイドメンバ３６、フロントバンパービーム４２等によって車体のフロントフレーム部３０が構成される。   The front frame portion 30 of the vehicle body is configured by the cowl top 13, the dash cross member upper 14, the front side member upper 31, the front side member lower 34, the front side member 36, the front bumper beam 42, and the like.

フロントサイドメンバアッパ３１の後部とフロアサイドメンバ２２の前端部との間に、両者を連結する接続部材としてのフロントサイドメンバリヤ５０が設けられている。フロントサイドメンバリヤ５０はフロントサイドメンバアッパ３１から後方に略水平に延びる水平前部（前部）５１と、この水平前部５１から下方に緩やかなカーブを介して斜め後下方向、かつ車幅方向内側に向かって延びる斜中間部（中間部）５２と、斜中間部５２の後端から緩やかなカーブを介して後方、かつ、車幅方向内側に水平に延びる水平後部（後部）５３とが連続して一体に成形されている。フロントサイドメンバリヤ５０はアルミニウム合金など軽合金塊の押出し成形によって得られ、例えば四角形の中空部を有する中空断面（閉断面形状）が長手方向に連続する細長の押出し部材からなり、一定の閉断面形状が連続する範囲で曲げ加工が施されて構成される。   Between the rear part of the front side member upper 31 and the front end part of the floor side member 22, a front side member rear 50 is provided as a connecting member for connecting the two. The front side member rear 50 has a horizontal front portion (front portion) 51 extending substantially horizontally rearward from the front side member upper 31 and a slanting rear lower direction and a vehicle width direction through a gentle curve downward from the horizontal front portion 51. An oblique intermediate portion (intermediate portion) 52 extending inward and a horizontal rear portion (rear portion) 53 extending rearward and horizontally inward in the vehicle width direction from the rear end of the oblique intermediate portion 52 are continuous. Are integrally formed. The front side member rear 50 is obtained by extrusion molding of a light alloy lump such as an aluminum alloy. For example, the front side member rear 50 is formed of an elongated extruded member having a hollow section (closed section shape) having a rectangular hollow portion in the longitudinal direction, and has a constant closed section shape. Is configured to be bent within a continuous range.

水平前部５１はフロントサイドメンバ３６と車幅方向及び高さ方向において同位置に配され、フロントサイドメンバアッパ３１を介してフロントサイドメンバ３６の延長線上に連続するように前後方向に延びている。水平前部５１の前端面５１ａはフロントサイドメンバアッパから内側に突出した突出部としてのフェンダーシールドパネル３３の後側壁面３３ａに接合されている。水平前部５１の外側壁面５１ｂはフロントサイドメンバアッパ３１の後端部の内側壁面３１ａの形状に沿うように形成され、スプリングハウス３２の下方であってフェンダーシールドパネル３３の後方において溶接によりフロントサイドメンバアッパ３１の内側壁面３１ａに接合されている。   The horizontal front portion 51 is disposed at the same position as the front side member 36 in the vehicle width direction and the height direction, and extends in the front-rear direction so as to continue on the extension line of the front side member 36 via the front side member upper 31. . A front end surface 51a of the horizontal front portion 51 is joined to a rear side wall surface 33a of a fender shield panel 33 as a protruding portion protruding inward from the front side member upper. An outer wall surface 51b of the horizontal front portion 51 is formed so as to follow the shape of the inner wall surface 31a of the rear end portion of the front side member upper 31, and is welded to the lower side of the spring house 32 and behind the fender shield panel 33 by welding. It is joined to the inner wall surface 31 a of the member upper 31.

フロントサイドメンバリヤ５０とダッシュクロスメンバアッパ１４とは連結部材６０によって連結されている。連結部材６０は、アルミ製の押し出し材から構成され、上下方向に延びている。連結部材６０の下端部６１が前記フロントサイドメンバリヤ５０の斜中間部５２の上端近傍に接合されるとともに連結部材６０の上端部６２が前記ダッシュクロスメンバアッパ１４の斜部１４ｂの下端近傍に接合されている。連結部材６０はその幅方向が車幅方向に沿う前側の板状部材６３と、その幅方向が車体前後方向に沿う外側の板状部材６４とを一体に有し横断面がＬ字形状に形成されている。   The front side member rear 50 and the dash cross member upper 14 are connected by a connecting member 60. The connecting member 60 is made of an aluminum extruded material and extends in the vertical direction. The lower end portion 61 of the connecting member 60 is joined to the vicinity of the upper end of the oblique intermediate portion 52 of the front side member rear 50, and the upper end portion 62 of the connecting member 60 is joined to the vicinity of the lower end of the oblique portion 14b of the dash cross member upper 14. ing. The connecting member 60 is integrally formed with a front plate-like member 63 whose width direction is along the vehicle width direction, and an outer plate-like member 64 whose width direction is along the vehicle body front-rear direction. Has been.

上記のように構成されたフレーム構造１では、前部から入力される衝撃力は、フロントバンパービーム４２により左右に振り分けられ、クラッシュボックス３９の変形で吸収されるとともにフロントサイドメンバ３６に伝達される。フロントサイドメンバ３６に入力された衝撃力はフロントサイドメンバアッパ３１及びフロントサイドメンバロア３４に振り分けられて分散して伝達されるとともにフロントサイドメンバリヤ５０を介してフロアサイドメンバ２２に伝達される。このとき一体成形の押出材で構成されるフロントサイドメンバリヤ５０の座屈変形によって衝撃エネルギーが吸収される。このとき、連結部材６０によってフロントサイドメンバリヤ５０が上下方向において支持される。また、フロントサイドメンバリヤ５０が前後方向の力によって変形する際には連結部材６０も変形する。   In the frame structure 1 configured as described above, the impact force input from the front part is distributed to the left and right by the front bumper beam 42, absorbed by deformation of the crash box 39 and transmitted to the front side member 36. The impact force input to the front side member 36 is distributed and transmitted to the front side member upper 31 and the front side member lower 34 and is transmitted to the floor side member 22 through the front side member rear 50. At this time, the impact energy is absorbed by the buckling deformation of the front side member rear 50 formed of the integrally formed extruded material. At this time, the front side member rear 50 is supported in the vertical direction by the connecting member 60. Further, when the front side member rear 50 is deformed by the force in the front-rear direction, the connecting member 60 is also deformed.

本実施形態にかかる車体フレーム構造１は以下に掲げる効果を奏する。すなわち、
上下に延びる連結部材６０によってフロントサイドメンバリヤ５０とダッシュクロスメンバアッパ１４とが連結されているため、上下方向におけるフロントメンバリヤ５０の変形が規制されるとともに、車体の上下方向における剛性が向上する。 The vehicle body frame structure 1 according to the present embodiment has the following effects. That is,
Since the front side member rear 50 and the dash cross member upper 14 are connected by the connecting member 60 extending vertically, deformation of the front member rear 50 in the vertical direction is restricted, and rigidity in the vertical direction of the vehicle body is improved.

したがって、衝突によって力が入力されると、フロントサイドメンバリヤ５０が前後方向に座屈変形することにより、衝突エネルギーを効率よく吸収できるとともに、フロントサイドメンバリヤ５０から後方のフロアサイドメンバ２２へ、衝突エネルギーが効率よく伝達される。   Therefore, when a force is input due to a collision, the front side member rear 50 is buckled and deformed in the front-rear direction, so that the collision energy can be efficiently absorbed and the collision energy is transferred from the front side member rear 50 to the rear floor side member 22. Is transmitted efficiently.

また連結部材６０は上下方向に延びるように構成され、前方からの力によっては曲げ変形可能であるため、フロントサイドメンバリヤ５０が前方からの力によって座屈変形しながらエネルギーを吸収する際には、連結部材６０も変形することで、衝突エネルギーの吸収を妨げることなく高い吸収効率を維持することができる。   Further, since the connecting member 60 is configured to extend in the vertical direction and can be bent and deformed by a force from the front, when the front side member rear 50 absorbs energy while buckling and deforming by a force from the front, By deforming the connecting member 60 as well, high absorption efficiency can be maintained without hindering absorption of collision energy.

さらに連結部材６０は互いに異なる向きの前側の板状部材６３と外側の板状部材６４とを備えて断面Ｌ字状に形成されているため、前後方向の力によって変形しやすく、衝撃吸収の効率が向上する。例えばスプリングハウス３２の上下の動きを、その下端に接合されたフロントサイドメンバリヤ５０及び連結部材６０を介してダッシュクロスメンバアッパ１４で支えることも可能となる。   Further, since the connecting member 60 is provided with a front plate member 63 and an outer plate member 64 in different directions, and is formed in an L-shaped cross section, it is easily deformed by the force in the front-rear direction, and the efficiency of shock absorption Will improve. For example, the vertical movement of the spring house 32 can be supported by the dash cross member upper 14 via the front side member rear 50 and the connecting member 60 joined to the lower end thereof.

アッパフレームとフロントサイドメンバの機能を持つフロントサイドメンバアッパ３１を前輪Ｗの中心軸Ｃよりも上方に設け、シャシメンバとフロントサイドメンバの機能を持つフロントサイドメンバロア３４を内側に設けたことにより、フロントサイドメンバ３６が前輪Ｗの中心領域とエンジン及びトランスミッションとの間を通らないようなレイアウトにすることができる。したがって、アッパフレームやシャシメンバに加えて前輪Ｗの中心軸Ｃの高さに横断面積の大きいフロントサイドメンバを車輌前後方向に延びるように配して強度を確保するフレーム構造と比較して、前輪Ｗの最大操舵時の切れ角を大きく設定することができる。また、結合部３５をＹ字状とし、車幅方向に断面中心線がずれているフロントサイドメンバアッパ３１の前端部とフロントサイドメンバロア３４の前端部とを結合したため、自動車に要求される衝突時の衝突エネルギー吸収性能を確保することができる。   By providing the front side member upper 31 having the functions of the upper frame and the front side member above the central axis C of the front wheel W, and providing the front side member lower 34 having the functions of the chassis member and the front side member on the inside, The layout can be such that the front side member 36 does not pass between the center region of the front wheels W and the engine and transmission. Therefore, in addition to the upper frame and the chassis member, a front side member having a large cross-sectional area is arranged at the height of the central axis C of the front wheel W so as to extend in the vehicle front-rear direction, so that the front wheel W The turning angle at the time of maximum steering can be set large. Further, since the coupling portion 35 is Y-shaped and the front end portion of the front side member upper 31 and the front end portion of the front side member lower 34, whose center line of the cross section is shifted in the vehicle width direction, are coupled, The collision energy absorption performance at the time can be secured.

なお本発明を実施するにあたり、格構成部材の具体的な形状や各種フレーム部材の断面形状など本発明の構成要素を発明の要旨を逸脱しない範囲で種々に変更して実施できることは言うまでもない。例えば、連結部材は断面がＬ字状である場合について例示したが、これに限られるものではなく、その断面がＴ字状や、中空部を有するロ字形状に形成されていてもよく、さらには一枚の板状部材からなる構成であっても良い。この他、本発明の要旨を逸脱しない範囲で種々変形実施可能であるのは勿論である。   In carrying out the present invention, it goes without saying that the constituent elements of the present invention, such as the specific shapes of the case members and the cross-sectional shapes of the various frame members, can be variously modified without departing from the spirit of the invention. For example, the connecting member has been exemplified for the case where the cross section is L-shaped, but is not limited thereto, and the cross section may be formed in a T shape or a hollow shape having a hollow portion. May be composed of a single plate-like member. Of course, various modifications can be made without departing from the scope of the present invention.

本発明の一実施形態にかかる車体フレーム構造を示す斜視図。The perspective view which shows the vehicle body frame structure concerning one Embodiment of this invention. 同車体フレーム構造を示す平面図。The top view which shows the same vehicle body frame structure. 同車体フレーム構造を示す側面図。The side view which shows the same vehicle body frame structure. 同車体フレーム構造の図１におけるＡ部分を拡大して示す斜視図。The perspective view which expands and shows the A section in FIG. 1 of the vehicle body frame structure. 同車体フレーム構造における連結部材を示す斜視図。The perspective view which shows the connection member in the vehicle body frame structure.

符号の説明Explanation of symbols

１…車体フレーム構造、１１…フロントピラアッパ、１２…フロントピラ、
１３…カウルトップ、１４…ダッシュクロスメンバアッパ、１４ａ…水平中央部、
１４ｂ…傾斜部、１４ｃ…水平端部、１５…ダッシュクロスメンバロア、
１５ａ…内側端面、２０…フロアフレーム部、２１…サイドシル、
２１ａ…内側壁面、２２…フロアサイドメンバ、３０…フロントフレーム部、
３１…フロントサイドメンバアッパ、３１ａ…内側壁面、３２…スプリングハウス、
３３…フェンダーシールドパネル、３３ａ…後側壁面、３４…フロントサイドメンバロア
３４ａ…車体前方延出部分、３５…結合部、３６…フロントサイドメンバ、
５０…フロントサイドメンバリヤ、５１…水平前部、５１ａ…前端面、５１ｂ…外側壁面、
５２…斜中間部、５３…水平後部、６０…連結部材、６１…下端部、６２…上端部、
６３、６４…板状部材。 1 ... body frame structure, 11 ... front pillar upper, 12 ... front pillar,
13 ... Cowl top, 14 ... Dash cross member upper, 14a ... Horizontal center,
14b ... inclined portion, 14c ... horizontal end portion, 15 ... dash cross member lower,
15a ... inner end face, 20 ... floor frame part, 21 ... side sill,
21a ... inner wall surface, 22 ... floor side member, 30 ... front frame part,
31 ... Front side member upper, 31a ... Inner wall surface, 32 ... Spring house,
33 ... Fender shield panel, 33a ... Rear side wall surface, 34 ... Front side member lower 34a ... Body front extension part, 35 ... Coupling part, 36 ... Front side member,
50 ... Front side member rear, 51 ... Horizontal front part, 51a ... Front end surface, 51b ... Outer wall surface,
52 ... Oblique middle part, 53 ... Horizontal rear part, 60 ... Connecting member, 61 ... Lower end part, 62 ... Upper end part,
63, 64: plate-like members.

Claims (4)

車室下部に配され、車幅方向両端部に配されたフロントピラから車体後方に延びる左右のサイドシルと、前記サイドシルよりも車幅方向内側において車体前後方向に延びる左右のフロアサイドメンバと、を有して構成されるフロアフレーム部と、
車室前方に配され、前輪の中心軸より上方に位置し、前記フロントピラより車両前方に延びるアッパメンバ部と、前記前輪の中心軸より下方に位置し、前記フロアフレーム部の前方で車両前方に延びるロアメンバ部と、前記アッパメンバ部と前記ロアメンバ部とがこれらの前方で結合される結合部より車両前方に延びる左右のフロントメンバ部と、左右の前記フロントピラの間で車幅方向に延びるダッシュクロスメンバアッパとを有して構成されるフロントフレーム部と、
前記フロントメンバ部の後方において前記フロアサイドメンバの前端部と前記アッパメンバ部とを連結するフロントサイドメンバリヤと、
車体上下方向に延び、前記フロントサイドメンバリヤと前記ダッシュクロスメンバアッパとを連結する連結部材と、を備えたことを特徴とする車体フレーム構造。 Left and right side sills that are arranged at the lower part of the passenger compartment and extend from the front pillars arranged at both ends in the vehicle width direction to the rear of the vehicle body, and left and right floor side members that extend in the vehicle longitudinal direction on the inner side in the vehicle width direction than the side sills, A floor frame portion configured to have,
An upper member portion that is disposed in front of the passenger compartment, is located above the center axis of the front wheel, extends forward of the vehicle from the front pillar, and is located below the center axis of the front wheel, and forward of the vehicle in front of the floor frame portion. A lower member portion extending, a left and right front member portion extending forward of the vehicle from a joint portion where the upper member portion and the lower member portion are coupled in front of each other, and a dash cross extending in the vehicle width direction between the left and right front pillars A front frame portion configured to have a member upper;
A front side member rear connecting the front end portion of the floor side member and the upper member portion behind the front member portion;
A vehicle body frame structure comprising: a connecting member extending in a vertical direction of the vehicle body and connecting the front side member rear and the dash cross member upper. 前記連結部材は、相異なる方向を向く複数の板状部材を一体に備えて構成され、その下端部が前記フロントサイドメンバリヤに接合されるとともにその上端部が前記ダッシュクロスメンバアッパに接合されていることを特徴とする請求項１記載の車体フレーム構造。   The connecting member is configured integrally with a plurality of plate-like members facing different directions, and a lower end portion thereof is joined to the front side member rear and an upper end portion thereof is joined to the dash cross member upper. The vehicle body frame structure according to claim 1. 前記ダッシュクロスメンバアッパは、車幅方向中央において左右に略水平に延びる中央部と、この中央部の左右両端から上方かつ左右外側方向に傾斜してそれぞれ延びる傾斜部と、左右の前記傾斜部の左右端部から車幅方向外側に向かって略水平に延びる左右の端部とを一体に備え、
前記フロントサイドメンバリヤは前記フロントサイドメンバアッパから後方に水平に延びる前部と、該前部から後下方向、かつ、車幅内側に向かって斜めに延びる斜中間部と、該斜中間部の後端から後方、かつ、車幅内側に向かって略水平に延びる後部とを一体に有し、
前記連結部材は、前記ダッシュクロスメンバアッパの前記傾斜部の下端近傍と前記フロントサイドメンバリヤの前記斜中間部の上端近傍を連結することを特徴とする請求項２記載の車体フレーム構造。 The dash cross member upper includes a central portion that extends substantially horizontally to the left and right at the center in the vehicle width direction, an inclined portion that extends upward and laterally outward from both left and right ends of the central portion, and left and right inclined portions. The left and right ends that extend substantially horizontally from the left and right ends toward the outside in the vehicle width direction are integrally provided,
The front side member rear includes a front portion horizontally extending rearward from the front side member upper portion, a slant intermediate portion extending rearwardly from the front portion and obliquely toward the vehicle width inside, and a rear portion of the slant intermediate portion. A rear portion extending rearward from the end and extending substantially horizontally toward the vehicle width inside;
3. The vehicle body frame structure according to claim 2, wherein the connecting member connects a vicinity of a lower end of the inclined portion of the dash cross member upper and a vicinity of an upper end of the oblique intermediate portion of the front side member rear. 前記フロントピラにはスプリングハウスが一体に形成され、前記フロントサイドメンバリヤの前端部は前記フロントメンバ部の延長線上後方における前記スプリングハウスの下方に接合されていることを特徴とする請求項３記載の車体フレーム構造。   4. A spring house is integrally formed on the front pillar, and a front end portion of the front side member rear is joined to a lower portion of the spring house on the rear side of an extension line of the front member portion. Body frame structure.
JP2007094602A 2007-03-30 2007-03-30 Body frame structure Expired - Fee Related JP5026136B2 (en)

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JP2011162182A (en) * 2010-02-10 2011-08-25 Audi Ag Vehicle body structure of vehicle having macpherson strut
JP2013159130A (en) * 2012-02-01 2013-08-19 Kobe Steel Ltd Front cowl member for automobile
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