JP2009018724A - Vehicle body frame structure - Google Patents

Vehicle body frame structure Download PDF

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JP2009018724A
JP2009018724A JP2007183545A JP2007183545A JP2009018724A JP 2009018724 A JP2009018724 A JP 2009018724A JP 2007183545 A JP2007183545 A JP 2007183545A JP 2007183545 A JP2007183545 A JP 2007183545A JP 2009018724 A JP2009018724 A JP 2009018724A
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vehicle body
frame
front
vehicle
longitudinal direction
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JP4875558B2 (en )
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Yasuhisa Egawa
Shigeto Yasuhara
重人 安原
泰久 江川
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Honda Motor Co Ltd
本田技研工業株式会社
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<P>PROBLEM TO BE SOLVED: To provide a vehicle body frame structure capable of compatibly absorbing a collision load and protecting a cabin during a collision of a vehicle without increasing the weight of a vehicle body. <P>SOLUTION: A cabin 13 of an automobile has an octagonal frame having a side sill 14 extending in the longitudinal direction of a vehicle body, a dashboard lower cross member 22 and a front cross member 23 extending in the vehicle width direction, and four inclined members 30b, 38. Thus, the cabin ensures the sufficient rigidity against the collision load in the longitudinal direction of the vehicle body and from the sides of the vehicle body, and the deformation of the cabin 13 can be minimized. Further, forward of the cabin 13, a front side frame 12 and a front bumper beam 21 constitute a U-shaped frame which is curved in a U-shape in the longitudinal direction of the vehicle body. Thus, the collision load from the longitudinal direction of the vehicle body including the offset collision is effectively absorbed by the collapse of the U-shaped frame of high rigidity, and the deformation of the cabin 13 can be prevented more effectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、自動車の車室や燃料タンク収納部を衝突荷重から保護するための車体フレーム構造に関する。 The present invention relates to a vehicle body frame structure for protecting the passenger compartment and the fuel tank accommodating portion of a motor vehicle from a collision load.

車体前部にU字型フレームよりなる衝突力吸収分散手段およびV字型フレームよりなる衝突力分散補強手段を前後方向に並置し、U字型フレームの変形により正面衝突の荷重を吸収するとともに、V字型フレームにより衝突荷重をエンジンクロスメンバからフロントフレームに伝達することで、フロントフレームの変形を抑制して該フロントフレームの車室内侵入を防止するものが、下記特許文献1により公知である。 The collision force dispersed reinforcing means consisting collision force absorbing dispersion means and V-shaped frame made of U-shaped frame juxtaposed in the longitudinal direction a front portion of a vehicle body, thereby absorbing the load of the frontal collision by the deformation of the U-shaped frame, the collision load by the V-shaped frame by transmitted from the engine cross member to the front frame, which prevents the passenger compartment intrusion of the front frame to suppress the deformation of the front frame, is known from Patent Publication 1 below.
特開平11−157468号公報 JP 11-157468 discloses

ところで上記従来のものは、車体前部のエンジンルームに、既存のフロントフレーム以外にU字型フレームおよびV字型フレームを追加して設ける必要があるため、車体重量が増加して燃料消費量が増加するだけでなく、車体中心線上に配置されたU字型フレームおよびV字型フレームがエンジン搭載の邪魔になり、しかもエンジンルームが前後方向に長くなって車室の空間を圧迫する問題があった。 By the way those of the prior art, the vehicle body front of the engine room, it is necessary to provide in addition a U-shaped frame and V-shaped frame in addition to the existing front frame, fuel consumption vehicle weight is increased not only increased, U-shaped frame and V-shaped frame disposed on the vehicle body center line in the way of the engine mounting, yet there is a problem that the engine room to squeeze the space of the passenger compartment is longer in the longitudinal direction It was.

本発明は前述の事情に鑑みてなされたもので、車両の衝突時の衝突荷重の吸収と車室の保護とを、車体重量を増加させることなく両立させることを目的とする。 The present invention has been made in view of the above circumstances, the protection of the absorbent and the cabin of the collision load at the time of collision of the vehicle, an object to achieve both without increasing the vehicle body weight.

上記目的を達成するために、請求項1に記載された発明によれば、自動車の車体の保護エリアが、車体前後方向に延びる左右一対の縦部材と、車幅方向に延びる前後一対の横部材と、前記縦部材および横部材の端部を斜めに連結する4個の傾斜部材とを有する八角形フレームを備え、前記保護エリアに接続されて車体前後方向端部に位置するエネルギー吸収エリアが、車体前後方向に向けてU字状に湾曲するU字状フレームを備えることを特徴とする車体フレーム構造が提案される。 To achieve the above object, according to the invention described in claim 1, protected area of ​​the vehicle body of the motor vehicle, the vehicle longitudinal and lateral pair of longitudinal members extending in the direction, a pair of transverse members before and after extending in the vehicle width direction If the longitudinal member and the ends of the transverse member comprises a octagonal frame having a four inclined member connecting diagonally, the energy-absorbing areas the connected to the protected area is located in the vehicle longitudinal direction end portion, a body frame structure, characterized in that it comprises a U-shaped frame which is curved in a U-shape toward the longitudinal direction of the vehicle body is proposed.

また請求項2に記載された発明によれば、請求項1の構成に加えて、前記保護エリアが車室であり、前記エネルギー吸収エリアがエンジンルームであることを特徴とする車体フレーム構造が提案される。 According to the invention described in claim 2, in addition to the first aspect, wherein the protection area is passenger compartment, the vehicle body frame structure in which the energy absorption area, characterized in that an engine room is proposed It is.

また請求項3に記載された発明によれば、請求項1の構成に加えて、前記保護エリアが燃料タンク収納部であり、前記エネルギー吸収エリアがトランクルームであることを特徴とする車体フレーム構造が提案される。 According to the invention described in claim 3, in addition to the first aspect, wherein the protected area is a fuel tank housing part, a body frame structure, wherein the energy absorbing area is trunk room It proposed.

尚、実施の形態のエンジンルーム11およびトランクルーム16は本発明のエネルギー吸収エリアに対応し、実施の形態の車室13および燃料タンク収納部15は本発明の保護エリアに相当し、実施の形態のサイドシル14およびリヤサイドフレーム17は本発明の縦部材に対応し、実施の形態のダッシュボードロアクロスメンバ22、ミドルクロスメンバ24およびリヤクロスメンバ25は本発明の横部材に相当し、実施の形態のアウトリガー30b、ガセット38,39および拡幅部25aは本発明の傾斜部材に対応する。 Incidentally, in response to the energy-absorbing area of ​​the engine compartment 11 and the luggage compartment 16 is the invention of the embodiment, the passenger compartment 13 and the fuel tank accommodating portion 15 of the embodiment corresponds to the protected area of ​​the present invention, embodiments of the side sill 14 and the rear side frame 17 corresponds to a longitudinal member of the present invention, the dashboard lower cross member 22 of the embodiment, the middle cross member 24 and the rear cross member 25 corresponds to a transverse member of the present invention, embodiments of the Outrigger 30b, gussets 38, 39 and the widened portion 25a corresponds to the inclined member of the present invention.

請求項1の構成によれば、自動車の車体の保護エリアが、車体前後方向に延びる左右一対の縦部材と、車幅方向に延びる前後一対の横部材と、前記縦部材および横部材の端部を斜めに連結する4個の傾斜部材とを有する八角形フレームを備えるので、車体前後方向からの衝突荷重にも車体側方からの衝突荷重にも充分な剛性を確保して保護エリアの変形を最小限に抑えることができる。 According to the first aspect, protected area of ​​the vehicle body of the motor vehicle, a pair of left and right longitudinal members extending in the longitudinal direction of the vehicle body, and a pair of transverse members before and after extending in the vehicle width direction, an end portion of the longitudinal member and transverse member since the provided octagonal frame having a four inclined member connecting diagonally, the deformation of the protection area to ensure sufficient rigidity to the collision load from the side of the vehicle body in a collision load from the vehicle front-rear direction it can be kept to a minimum. また保護エリアに接続されて車体前後方向端部に位置するエネルギー吸収エリアが、車体前後方向に向けてU字状に湾曲するU字状フレームを備えるので、オフセット衝突を含む車体前後方向からの衝突荷重を高剛性のU字状フレームの圧壊で効果的に吸収し、保護エリアの変形を一層効果的に防止することができる。 The energy absorbing area is connected to the protected area is located in the vehicle longitudinal direction end portion, so comprises a U-shaped frame which is curved in a U-shape toward the vehicle front-rear direction, the collision of the vehicle front-rear direction including an offset collision a load effectively absorbed by collapse of the U-shaped frame having high rigidity, the deformation of the protection area can be more effectively prevented. しかも特別の補強部材を設ける必要がないので、重量の増加を伴わずに衝突荷重の吸収と車室の保護とを両立させることができる。 Since moreover there is no need to provide a special reinforcing member, it is possible to achieve both protection of absorbent and cabin of collision load without increasing the weight.

また請求項2の構成によれば、車室を保護エリアとし、エンジンルームをエネルギー吸収エリアとしたので、車体前方から入力される衝突荷重をエンジンルームのU字状フレームの圧壊で効果的に吸収し、かつ高剛性の八角形フレームで車室の変形を防止して乗員を保護することができる。 According to the second aspect, the vehicle compartment and protected area, since the engine room and the energy absorption area, effectively absorb the collision load inputted from the vehicle front in collapse of the U-shaped frame of the engine room and, and it is possible to protect the occupant by preventing the deformation of the vehicle compartment in octagonal frame of high rigidity.

また請求項3の構成によれば、燃料タンク収納部を保護エリアとし、トランクルームをエネルギー吸収エリアとしたので、車体後方から入力される衝突荷重をトランクルームのU字状フレームの圧壊で効果的に吸収し、かつ高剛性の八角形フレームで燃料タンク収納部の変形を防止して燃料タンクを保護することができる。 According to the third aspect, the fuel tank accommodating portion as a protective area, since the trunk compartment and the energy absorption area, effectively absorb the collision load inputted from the vehicle body rear side in collapse of the U-shaped frame of the luggage compartment and, and to prevent deformation of the fuel tank accommodating portion can protect the fuel tank in an octagonal frame of high rigidity.

以下、本発明の実施の形態を添付図面に基づいて説明する。 It will be described below with reference to embodiments of the present invention in the accompanying drawings.

図1〜図7は本発明の実施の形態を示すもので、図1は自動車の車体フレームを下面から見た図、図2は図1の2方向矢視図、図3は図1の3部拡大図、図4は図3の4−4線断面図、図5は図1に保護エリアおよびエネルギー吸収エリアの形状を書き加えた図、図6は正面・後面衝突時および側面衝突時の荷重伝達経路を示す図、図7は正面衝突時のフロントサブフレームの変形を説明する図である。 1 to 7 show a form of embodiment of the present invention, FIG. 1 is viewed body frame of an automobile from the lower surface, Figure 2 is two-way arrow view of FIG. 1, FIG. 3 is 3 in FIG. 1 part enlarged view, FIG. 4 is sectional view taken along line 4-4 of FIG. 3, FIG. 5 is added to write shape of the protective area and energy-absorbing area in Figure 1 Figure, 6 at the time when after the front-side collision and side collision illustrates a load transfer path, FIG. 7 is a diagram explaining the deformation of the front sub-frame during a frontal crash.

図1および図2に示すように、自動車の車体フレームは、エンジンルーム11の左右両側部に沿って車体前後方向に延びる左右一対のフロントサイドフレーム12,12と、車室13の左右両側部に沿って車体前後方向に延びる左右一対のサイドシル14,14と、燃料タンク収納部15およびトランクルーム16の左右両側部に沿って車体前後方向に延びる左右一対のリヤサイドフレーム17,17と、フロントサイドフレーム12,12の前端から後上方に延び、左右のサイドシル14,14の前端から立ち上がる左右一対のフロントピラーロア18,18の上端に連結される左右一対のアッパーメンバ19,19と、車幅方向に延びてフロントサイドフレーム12,12の前端にフロントサイドフレームエクステンション20…を介し As shown in FIGS. 1 and 2, a vehicle body frame of an automobile, a pair of left and right front side frames 12 and 12 extending in the longitudinal direction of the vehicle body along the left and right side portions of the engine room 11, the left and right side portions of the car 13 a pair of left and right side sills 14, 14 extending in the longitudinal direction of the vehicle body along a pair of left and right rear side frames 17 and 17 extending in the longitudinal direction of the vehicle body along the left and right side portions of the fuel tank accommodating portion 15 and the trunk room 16, the front side frame 12 , extends rearward and upward from the front end 12, a pair of left and right upper members 19 and 19 left and right are connected to the pair of upper end of the lower front pillar 18 rising from the front end of the left and right side sills 14 and 14, extends in the vehicle width direction the front side frame extension 20 ... through the front end of the front side frames 12 and 12 Te 両端が接続されたフロントバンパービーム21と、車幅方向に延びて左右のフロントサイドフレーム12,12の後端間を接続するダッシュボードロアクロスメンバ22と、車幅方向に延びて左右のサイドシル14,14の前後方向中間部間を接続するフロントクロスメンバ23と、車幅方向に延びて左右のリヤサイドフレーム17,17の前端間を接続するミドルクロスメンバ24と、車幅方向に延びて左右のリヤサイドフレーム17,17の前後方向中間部間を接続するリヤクロスメンバ25と、車幅方向に延びて左右のリヤサイドフレーム17,17の後端間を接続するリヤバンパービーム26と、幅方向に延びてリヤクロスメンバ25およびリヤバンパービーム26間で左右のリヤサイドフレーム17,17を接続するリヤエンド The front bumper beam 21 with both ends connected to a dashboard lower cross member 22 for connecting the rear ends of the left and right front side frames 12 and 12 extends in the vehicle width direction, left and right side sills extending in the vehicle width direction 14, a front cross member 23 that connects the front-rear direction intermediate portion of 14, the middle cross member 24 for connecting the front ends of the left and right rear side frames 17 and 17 extends in the vehicle width direction, of the left and right extending in a vehicle width direction rear side a rear cross member 25 that connects the front-rear direction intermediate portion of the frame 17, a rear bumper beam 26 for connecting the rear ends of the left and right rear side frames 17 and 17 extending in the vehicle width direction, it extends in the width direction rear end for connecting the left and right rear side frames 17 and 17 between the rear cross member 25 and the rear bumper beam 26 レーム27と、ダッシュボードロアクロスメンバ22からミドルクロスメンバ24へと延びるフロアトンネル28の左右両側に沿って延びる左右一対のセンターフレーム29,29と、フロントサイドフレーム12,12、サイドシル14,14およびセンターフレーム29,29を連結する左右一対の連結部材30,30と、左右のフロントサイドフレーム12,12の下部に支持されるフロントサブフレーム31とを備える。 A frame 27, a pair of left and right center frames 29, 29 extending along the left and right sides of the floor tunnel 28 extending from the dashboard lower cross member 22 to the middle cross member 24, front side frames 12 and 12, side sills 14 and 14 and comprises a pair of right and left connecting members 30 and 30 for connecting the center frame 29, a front sub-frame 31 which is supported at the bottom of the left and right front side frames 12 and 12.

フロントサブフレーム31は、左右一対の縦フレーム32,32を前後一対の横フレーム33,34で四角枠状に接続して構成され、縦フレーム32,32の前端がゴムブッシュジョイント35,35を介してフロントサイドフレーム12,12の前端下面に弾性支持されるとともに、縦フレーム32,32の後端がゴムブッシュジョイント36,36を介して連結部材30,30の下面に弾性支持される。 Front subframe 31 is composed a pair of left and right vertical frames 32 and 32 by a pair of front and rear transverse frames 33 and 34 are connected to the rectangular frame, the front end of the vertical frames 32, 32 via a rubber bush joint 35, 35 converting mechanism is elastically supported on the front end lower surface of the front side frames 12 and 12, the rear end of the longitudinal frame 32, 32 is elastically supported on the lower surface of the connecting member 30, 30 via a rubber bush joint 36, 36.

次に、図1〜図4を参照して連結部材30,30の構造を説明する。 Next, the structure of the connecting members 30 and 30 will be described with reference to FIGS. 左右の連結部材30,30は鏡面対称な形状を有するため、その一方について説明する。 Connecting members 30 and 30 of the left and right to have a mirror-symmetrical shape, will be described while.

図1に網掛けして示す連結部材30は、金属パネルをプレス成形した単一の部材で構成されるもので、前端に下向きにカップ状に突出するフロントサブフレーム取付部30aを備え、フロントサブフレーム取付部30aから車幅方向外側かつ後方に向かってアウトリガー30bが斜めに延びるとともに、フロントサブフレーム取付部30aから車幅方向内側かつ後方に向かってセンターフレームエクステンション30cが斜めに延びている。 Connecting member 30 shown in hatching in FIG. 1, the metal panels intended to be composed of a single member formed by pressing, with a front sub-frame attachment portion 30a which projects downwardly into a cup shape at the front end, the front sub with outrigger 30b extending obliquely from the frame mounting portion 30a and outward in the vehicle width direction and rearward, the center frame extension 30c from the front sub-frame mounting portion 30a toward the inside in the vehicle width direction and rearward extends obliquely.

連結部材30のフロントサブフレーム取付部30aに隣接するセンターフレームエクステンション30cの車幅方向内面にダッシュボードロアクロスメンバ22の左右両端部が接続されるとともに、そこから斜め後方に延びるセンターフレームエクステンション30cの後端がセンターフレーム29の前端に接続される。 With left and right ends of the dashboard lower cross member 22 is connected to the vehicle width direction inner surface of the center frame extension 30c that is adjacent to the front sub-frame mounting portion 30a of the connecting member 30, of the center frame extension 30c extending therefrom obliquely rearward rear end is connected to the front end of the center frame 29. また連結部材30のアウトリガー30bの前端がフロントサイドフレーム12の後端に接続され、後端がサイドシル14の前端に接続される。 The front end of the outrigger 30b of the connecting member 30 is connected to the rear end of the front side frame 12, the rear end is connected to the front end of the side sill 14.

連結部材30のフロントサブフレーム取付部30aの内部には前記ゴムブッシュジョイント36が収納され、それを貫通するボルト37にフロントサブフレーム31の後部が支持される(図4参照)。 Inside the front subframe mounting portion 30a of the connecting member 30 are accommodated the rubber bush joint 36, the rear portion of the front subframe 31 is supported on a bolt 37 extending therethrough (see FIG. 4). 尚、フロントサブフレーム31の前部も、同様の構造のゴムブッシュジョイント35(図1参照)を介してフロントサイドフレーム12の下面に支持される。 Incidentally, the front portion of the front subframe 31 is also supported on the lower surface of the front side frame 12 via the similar rubber bush joint 35 of the structure (see Figure 1).

図1および図5を併せて参照すると明らかなように、第1の保護領域である車室13を囲むフレームは、平面視で八角形状に構成される。 As is apparent Referring also to FIGS. 1 and 5, a frame surrounding the passenger compartment 13 is a first protection area is configured octagonal in plan view. 即ち、車体前後方向に延びる左右のサイドシル14,14と、車幅方向に延びるダッシュボードロアクロスメンバ22およびミドルクロスメンバ24と、サイドシル14,14の前端およびダッシュボードロアクロスメンバ22の左右両端を斜めに接続する左右のアウトリガー30b,30bと、サイドシル14,14の後端およびミドルクロスメンバ24の左右両端を斜めに接続する左右のガセット38,38とが、図5に太線Aで示すように全体として八角形を構成する。 That is, the left and right side sills 14, 14 extending in the longitudinal direction of the vehicle body, a dashboard lower cross member 22 and the middle cross member 24 extending in the vehicle width direction, the left and right ends of the front end of the side sill 14 and 14 and the dashboard lower cross member 22 left and right outriggers 30b to be connected obliquely, 30b and, the left and right gussets 38, 38 connecting the left and right ends of the rear end and the middle cross member 24 of the side sill 14 and 14 obliquely, as shown in FIG. 5 by thick lines a as a whole constitute the octagon.

また第2の保護領域である燃料タンク収納部15を囲むフレームは、平面視で八角形状に構成される。 The frame surrounding the fuel tank accommodating portion 15 is a second protective region is configured octagonal in plan view. 即ち、車体前後方向に延びる左右のリヤサイドフレーム17,17と、車幅方向に延びるミドルクロスメンバ24およびリヤクロスメンバ25と、リヤサイドフレーム17,17の前端およびミドルクロスメンバ24の左右両端を斜めに接続する左右のガセット39,39と、リヤサイドフレーム17,17に接続されるリヤクロスメンバ25の左右両端を斜め前方に拡幅した拡幅部25a,25aとが、図5に太線Bで示すように全体として八角形を構成する。 That is, the left and right rear side frames 17 and 17 extending in the longitudinal direction of the vehicle body, and the middle cross member 24 and the rear cross member 25 extending in the vehicle width direction, the left and right ends of the front and middle cross member 24 of the rear side frames 17 and 17 obliquely left and right gussets 39, 39 connecting, widening section 25a of the left and right ends and widened obliquely forward of the rear cross member 25 connected to the rear side frames 17 and 17, and the 25a, the whole as shown by a thick line B in FIG. 5 constitute the octagon as.

また車室13の前方に配置されて第1のエネルギー吸収領域を構成するエンジンルーム11を囲むフレームは、平面視で概ねU字状に形成される。 The frame surrounding the engine room 11 of the first energy-absorbing region is disposed in front of the passenger compartment 13 is formed in a generally U-shape in plan view. 即ち、フロントバンパービーム21は車体前方側に凸に湾曲しているため、そのフロントバンパービーム21と、その車幅方向両端から車体後方に延びるフロントサイドフレーム12,12およびアッパーメンバ19,19とは、図5に太線Cで示すように全体としてU字状を構成する。 That is, since the front bumper beam 21 is curved convexly toward the front side of the vehicle body, and its front bumper beam 21, the front side frames 12 and 12 and the upper member 19, 19 extends in the vehicle rearward from the vehicle lateral direction end, as shown in FIG. constituting a U-shape as a whole as shown by the bold line C to 5.

また燃料タンク収納部15の後方に配置されて第2のエネルギー吸収領域を構成するトランクルーム16を囲むフレームは、平面視で概ねU字状に形成される。 The frame surrounding the trunk compartment 16 of the second energy-absorbing region is disposed behind the fuel tank accommodating portion 15 is formed into a generally U-shape in plan view. 即ち、リヤエンドフレーム27は車体後方側に凸に湾曲しているため、そのリヤエンドフレーム27と、その車幅方向両端から車体前方に延びるリヤサイドフレーム17,17とは、図5に太線Dで示すように全体としてU字状を構成する。 That is, since the rear end frame 27 is curved convexly toward the rear side of the vehicle body, and its rear end frame 27, the rear side frames 17 and 17 extending from the both vehicle transverse direction end in front of the vehicle body, as shown by a thick line D in FIG. 5 whole constitutes a U-shape.

次に、上記構成を備えた本発明の実施の形態の作用を説明する。 Next, the operation of the embodiment of the present invention having the above-described arrangement.

図5および図6から明らかなように、車体前方側に凸に湾曲するフロントバンパービーム21と、その車幅方向両端から車体後方に延びるフロントサイドフレーム12,12およびアッパーメンバ19,19とは全体としてU字状を成すので、車両の衝突により車体前方から入力する衝突荷重に対して高い剛性を持ち、それが圧壊する際に大きな衝撃吸収効果を発揮することで、車室13の変形を最小限に抑えることができる。 As is apparent from FIGS. 5 and 6, a front bumper beam 21 that is curved convexly toward the front side of the vehicle body, as a whole the front side frames 12 and 12 and the upper member 19, 19 extends in the vehicle rearward from the vehicle lateral direction end since forming a U-shaped, has high rigidity against collision load inputted from the vehicle front by a collision of the vehicle, by which to exert a great impact absorbing effect in crushing, minimizing the deformation of the vehicle compartment 13 it can be suppressed to.

また車室13を囲むサイドシル14,14と、ダッシュボードロアクロスメンバ22およびミドルクロスメンバ24と、サイドシル14,14の前端およびダッシュボードロアクロスメンバ22の左右両端を斜めに接続する左右のアウトリガー30b,30bと、サイドシル14,14の後端およびミドルクロスメンバ24の左右両端を斜めに接続する左右のガセット38,38とが八角形のフレームを構成するので、四角形のフレームに比べて剛性が増加して車室13の変形が更に効果的に抑制される。 The side sill 14 and 14 surrounding the passenger compartment 13, a dashboard lower cross member 22 and the middle cross member 24, the left and right outriggers 30b for connecting the left and right ends of the front end of the side sill 14 and 14 and the dashboard lower cross member 22 obliquely and 30b, since the left and right gussets 38 and 38 the left and right ends connected to the oblique rear end and the middle cross member 24 of the side sill 14 and 14 constitute an octagonal frame, rigidity in comparison with the rectangular frame increases deformation of the vehicle compartment 13 can be more effectively suppressed by. 何故ならば、外力に対して最も変形し難い形状は円形であり、八角形は四角形よりも円形に近いからである。 Because, most hardly deformed shape against external force is circular, octagonal is because nearly circular than quadrilateral. この八角形のフレーム構造は、正面衝突時だでけでなく、サイドシル14,14側から荷重が入力する側面衝突時にも車室13の変形を最小限に抑えることができる。 The frame structure of the octagon can be minimized not only by it during frontal collision, the deformation of the vehicle compartment 13 when a side collision of inputting a load from the side sill 14 and 14 side.

同様に、車体後方側に凸に湾曲するリヤエンドフレーム27と、その車幅方向両端から車体前方に延びるリヤサイドフレーム17,17とは全体としてU字状を成すので、車両の衝突により車体後方から入力する衝突荷重に対して高い剛性を持ち、それが圧壊する際に大きな衝撃吸収効果を発揮することで、燃料タンク収納部15の変形を最小限に抑え、燃料タンクの損傷を防止することができる。 Similarly input, a rear end frame 27 which is curved convexly toward the rear side of the vehicle body, so that from both vehicle transverse direction end and rear side frames 17 and 17 extending in the front of the vehicle body as a whole forms a U-shape, from the rear of the vehicle body by a collision of the vehicle has a high stiffness against crash impact, it is possible to exert a great impact absorbing effect in crushing, minimizing deformation of the fuel tank accommodating portion 15, it is possible to prevent damage to the fuel tank .

また燃料タンク収納部15を囲むリヤサイドフレーム17,17と、車幅方向に延びるミドルクロスメンバ24およびリヤクロスメンバ25と、リヤサイドフレーム17,17の前端およびミドルクロスメンバ24の左右両端を斜めに接続する左右のガセット39,39と、リヤサイドフレーム17,17に接続されるリヤクロスメンバ25左右両端を斜め前方に拡幅した拡幅部25a,25aとが八角形のフレームを構成するので、四角形のフレームに比べて剛性が増加して燃料タンク収納部15の変形が更に効果的に抑制される。 Connection also the rear side frames 17 and 17 surrounding the fuel tank accommodating portion 15, a middle cross member 24 and the rear cross member 25 extending in the vehicle width direction, the left and right ends of the front and middle cross member 24 of the rear side frames 17 and 17 obliquely left and right gussets 39 and 39 that, since the widened portion 25a which is widened rear cross member 25 right and left ends obliquely forward to be connected to the rear side frames 17 and 17, and the 25a constitute the octagonal frame, the rectangular frame deformation of the fuel tank accommodating portion 15 is further effectively suppressed rigidity is increased compared. この八角形のフレーム構造は、後面衝突時だでけでなく、リヤサイドフレーム17,17側から荷重が入力する側面衝突時にも燃料タンク収納部15の変形を最小限に抑えることができる。 The frame structure of the octagon, not only is it during a rear-end collision, the deformation of the fuel tank accommodating portion 15 even when a side collision load from the rear side frame 17 and 17 side is input can be minimized.

車両の正面衝突時にフロントサイドフレーム12に後向きの荷重が作用すると、図3に示すように、その荷重は連結部材30を介してサイドシル14およびセンタフレーム29に伝達されて分散される。 When rearward load is applied to the front side frame 12 when the front collision of the vehicle, as shown in FIG. 3, the load is distributed is transmitted to the side sill 14 and the center frame 29 via a connecting member 30. このとき、連結部材30のアウトリガー30bは車幅方向外側に向かって斜め後方に延びているため、それが車幅方向に真っ直ぐ延びている場合に比べて、フロントサイドフレーム12からの荷重を効率的にサイドシル14に伝達することができる。 At this time, since the outrigger 30b of the connecting member 30 extends obliquely rearward and outward in the vehicle width direction, it is compared with the case that straight extends in the vehicle width direction, efficient load from the front side frame 12 it can be transmitted to the side sill 14. また連結部材30のセンターフレームエクステンション30cは車幅方向内側に向かって斜め後方に延びているため、それが車幅方向に真っ直ぐ延びている場合に比べて、フロントサイドフレーム12からの荷重を効率的にセンターフレーム29に伝達することができる。 Since the center frame extension 30c of the coupling member 30 extends obliquely rearward toward the inside in the vehicle width direction, as compared with the case where it is extends straight in the vehicle width direction, efficient load from the front side frame 12 it can be transmitted to the center frame 29.

しかも連結部材30は、フロントサブフレーム取付部30a、アウトリガー30bおよびセンターフレームエクステンション30cよりなる単一の部材で構成されるので、それらを別部材で構成して一体に結合する場合に比べて部品点数を削減することができるだけでなく、連結部材30の強度も増加する。 Moreover the coupling member 30, the front sub-frame mounting section 30a, because it is composed of a single member made of outrigger 30b and the center frame extension 30c, the number of parts as compared with the case where bonded together to constitute them in a different member not only can reduce the strength of the connecting member 30 is also increased. 尚、連結部材30の強度が必要な部分にブランクを重ね合わせて補強することも可能である。 It is also possible to reinforce by superimposing blanks where needed strength of the connecting member 30.

また連結部材30のセンターフレームエクステンション30cの前端にフロントサブフレーム取付部30aを設けたので、正面衝突時に連結部材30側からフロントサブフレーム31に反力を作用させ、図7に示すように、フロントサブフレーム31を折り曲げて衝突エネルギーを吸収しながら、車室13の変形を抑制することができる。 Also it is provided with the front sub-frame mounting portion 30a at the front end of the center frame extension 30c of the connecting member 30, by the action of the reaction force on the front subframe 31 from the connecting member 30 side at the time of frontal collision, as shown in FIG. 7, the front while absorbing collision energy by bending the subframe 31, it is possible to suppress deformation of the vehicle compartment 13.

更に、フロントサブフレーム31の後方には左右の前席が配置されるが、それら前席に着座した乗員の脚部の下方に対応する位置が強度の高い連結部材30,30で補強されているので、正面衝突の衝撃から乗員の脚部を保護することができる。 Further, the rear of the front subframe 31 while the left and right front seats are placed, a position corresponding to beneath the occupant's legs seated on their front seat is reinforced with high strength connecting members 30 since, it is possible to protect the occupant leg from impact frontal collision.

以上、本発明の実施の形態を説明したが、本発明はその要旨を逸脱しない範囲で種々の設計変更を行うことが可能である。 Having described the embodiments of the present invention, the present invention can be modified in a variety of ways without departing from the spirit and scope thereof.

例えば、実施の形態では本発明のフレーム構造を、前側のエンジンルーム11および車室13と、後側のトランクルームおよび燃料タンク収納部15とに適用しているが、その前後何れか一方だけに適用することができる。 For example, applying the frame structure of the present invention in the embodiment, the front of the engine room 11 and the passenger compartment 13, but is applied to the trunk room and the fuel tank accommodating portion 15 of the rear, the only one that either before or after can do.

また実施の形態ではガセット38,39をミドルクロスメンバ24と別部材で構成しているが、それらをミドルクロスメンバ24の両端を拡幅することで一体に形成しても良い。 Although constitute a gusset 38, 39 as a separate member and the middle cross member 24 in the embodiment, it may be formed integrally by them widens both ends of the middle cross member 24.

自動車の車体フレームを下面から見た図 View of the body frame of the vehicle from the lower surface 図1の2方向矢視図 2 direction arrow view of FIG. 1 図1の3部拡大図 3 an enlarged view of FIG. 1 図3の4−4線断面図 Sectional view taken along line 4-4 in FIG. 3 図1に保護エリアおよびエネルギー吸収エリアの形状を書き加えた図 FIG plus write shape of the protective area and energy-absorbing area in FIG. 1 正面・後面衝突時および側面衝突時の荷重伝達経路を示す図 Illustrates a load transfer path at the time when the front-rear collision and side collision 正面衝突時のフロントサブフレームの変形を説明する図 View for explaining a deformation of the front sub-frame during a head-on collision

符号の説明 DESCRIPTION OF SYMBOLS

11 エンジンルーム(エネルギー吸収エリア) 11 engine room (energy absorption area)
13 車室(保護エリア) 13 passenger compartment (protected area)
14 サイドシル(縦部材) 14 side sills (longitudinal members)
15 燃料タンク収納部(保護エリア) 15 fuel tank accommodating portion (protection area)
16 トランクルーム(エネルギー吸収エリア) 16 trunk room (energy absorption area)
17 リヤサイドフレーム(縦部材) 17 rear side frame (vertical member)
22 ダッシュボードロアクロスメンバ(横部材) 22 dashboard lower cross member (lateral member)
24 ミドルクロスメンバ(横部材) 24 middle cross member (lateral member)
25 リヤクロスメンバ(横部材) 25 rear cross member (lateral member)
25a 拡幅部(傾斜部材) 25a widened portion (inclined member)
30b アウトリガー(傾斜部材) 30b Outrigger (inclined member)
38 ガセット(傾斜部材) 38 gusset (inclined member)
39 ガセット(傾斜部材) 39 gusset (inclined member)

Claims (3)

  1. 自動車の車体の保護エリア(13,15)が、車体前後方向に延びる左右一対の縦部材(14,17)と、車幅方向に延びる前後一対の横部材(22,24,25)と、前記縦部材(14,17)および横部材(22,24,25)の端部を斜めに連結する4個の傾斜部材(30b,38,39,25a)とを有する八角形フレームを備え、前記保護エリア(13,15)に接続されて車体前後方向端部に位置するエネルギー吸収エリア(11,16)が、車体前後方向に向けてU字状に湾曲するU字状フレームを備えることを特徴とする車体フレーム構造。 Protected area of ​​a vehicle body (13, 15) is a pair of left and right longitudinal members extending in the longitudinal direction of the vehicle body (14, 17), and a pair of front and rear transverse members extending in the vehicle width direction (22, 24, 25), wherein four inclined members (30b, 38,39,25A) for connecting the ends of the longitudinal members (14, 17) and transverse members (22, 24, 25) obliquely with octagonal frame and a, the protection energy absorption area is connected to the area (13, 15) located in the vehicle longitudinal direction end portions (11, 16) has a feature in that it comprises a U-shaped frame which is curved in a U-shape toward the longitudinal direction of the vehicle body the vehicle body frame structure.
  2. 前記保護エリアが車室(13)であり、前記エネルギー吸収エリアがエンジンルーム(11)であることを特徴とする、請求項1に記載の車体フレーム構造。 Wherein a protective area passenger compartment (13), wherein the energy absorbing area is an engine room (11), the vehicle body frame structure according to claim 1.
  3. 前記保護エリアが燃料タンク収納部(15)であり、前記エネルギー吸収エリアがトランクルーム(16)であることを特徴とする、請求項1に記載の車体フレーム構造。 The protected area is a fuel tank housing part (15), wherein the energy absorbing area is trunk compartment (16), the vehicle body frame structure according to claim 1.
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JP2015020672A (en) * 2013-07-22 2015-02-02 本田技研工業株式会社 Vehicle body structure of automobile

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