JP4038036B2 - Rear body structure of automobile - Google Patents

Rear body structure of automobile Download PDF

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Publication number
JP4038036B2
JP4038036B2 JP2001323745A JP2001323745A JP4038036B2 JP 4038036 B2 JP4038036 B2 JP 4038036B2 JP 2001323745 A JP2001323745 A JP 2001323745A JP 2001323745 A JP2001323745 A JP 2001323745A JP 4038036 B2 JP4038036 B2 JP 4038036B2
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Japan
Prior art keywords
vehicle
subframe
members
frame
discontinuous
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JP2001323745A
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Japanese (ja)
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JP2003127907A (en
Inventor
健二 小林
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Daihatsu Motor Co Ltd
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Daihatsu Motor Co Ltd
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Priority to JP2001323745A priority Critical patent/JP4038036B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、バッテリ,燃料タンク等の車載部品が搭載されたサブフレームをリヤサイドメンバにより支持するようにした自動車の後部車体構造に関する。
【0002】
【従来の技術】
近年、充電の必要がない燃料電池等を搭載した電気自動車の開発が進んでいる。この種の電気自動車の開発を行なうにあたっては、ガソリン車等の現存車両を改造して行なう場合がある。このような現存車両に燃料電池,水素タンク等の重量物を搭載する場合、これらの重量等に対応した強度,剛性を有するサブフレームを新作し、該サブフレームを介して燃料電池等の車載部品を左,右のリヤサイドメンバにより支持する構造を採用するのが一般的である。
【0003】
上記サブフレームとして、例えば、図6,図7に示すように、矩形枠状に形成された下フレーム部材51の後部に複数本の柱部材53により上フレーム部材52を結合した構造のものがある。
【0004】
そしてサブフレーム50の下フレーム部材51の前部に水素タンク55を搭載固定し、上フレーム部材52に燃料電池本体56を搭載固定し、前フレーム部材51の左,右前端部51a,51bと、後フレーム部材52の左,右前端部52a,52b及び後端部52c,52dとをそれぞれ左,右のリヤサイドメンバ60にボルト締め結合する場合がある。
【0005】
【発明が解決しようとする課題】
ところで、上記サブフレーム50は車載部品55,56の重量に相応した強度,剛性を有する構造となっていることから、例えば、図8に示すように、後突により車両後方から衝撃力Fが加わった場合には、サブフレーム50がリヤサイドメンバ60の座屈変形の妨げとなって、該リヤサイドメンバ60の衝突吸収構造が十分に機能しないおそれがある。その結果、入力がそのまま車載部品55,56に伝わり、場合によっては破損するという懸念がある。
【0006】
本発明は、上記状況に鑑みてされたもので、強度,剛性の高いサブフレームをリヤサイドメンバに結合する場合の、該リヤサイドメンバの衝撃吸収機能を確保でき、ひいては燃料電池本体や水素タンク等の車載部品への影響を抑制できる自動車の後部車体構造を提供することを目的としている。
【0007】
請求項1の発明は、車両前後方向に延びる左右のリヤサイドメンバによりバッテリ,燃料タンク等の車載部品が搭載されたサブフレームの少なくとも前端部及び後端部を支持するようにした自動車の後部車体構造において、上記サブフレームは、該サブフレームの前,後支持部の中間に非連続部を設け、該非連続部によって分離された前側フレーム部と後側フレーム部とを、上記非連続部を車両上側又は下側にて迂回するように形成された迂回部材により連結することにより構成されていることを特徴としている。
【0008】
請求項2の発明は、請求項1において、上記リヤサイドメンバの上記非連続部に臨む部分にリヤサスペンション部材が配設されていることを特徴としている。
【0009】
【発明の作用効果】
本発明にかかる後部車体構造によれば、サブフレームの前,後支持部の中間に非連続部を設け、該非連続部により分離された前側フレーム部と後側フレーム部とを迂回部材により連結したので、車両後方からの入力によって後側フレーム部が非連続部に進入して屈曲変形することとなり、これによりリヤサイドメンバが座屈変形し、もってリヤサイドメンバの衝撃吸収機能を十分に発揮させることができる。これにより入力が車載部品,例えば燃料電池や水素タンクに直接伝わるのを回避でき、車載部品が破損するのを防止できる。
【0010】
また上記前側フレーム部と後側フレーム部とを非連続部を車両上側又は下側にて迂回するように形成した迂回部材により連結したので、車載部品に相応したサブフレームの強度,剛性を確保することができ、非連続部を設けたことによる強度低下の懸念を回避できる。
【0011】
請求項2の発明では、リヤサイドメンバの非連続部に臨む部分にリヤサスペンション部材を配設したので、非連続部の分だけサブフレームの占有空間を縮小することが可能となり、リヤサスペンションを効率良くレイアウトすることができる。
【0012】
【発明の実施の形態】
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。
【0013】
図1ないし図5は、本発明の一実施形態による燃料電池電気自動車の後部車体構造を説明するための図であり、図1,図2,図3はそれぞれサブフレームの斜視図,平面図,側面図、図4はサブフレームの屈曲変形を模式的に示す図、図5は燃料電池電気自動車の概略図である。
【0014】
図5において、1は燃料電池電気自動車を示しており、これの車体2は左,右のサイドパネル(不図示)の上端間にルーフパネル3を配設するとともに、下端間にフロアパネル4を配設して車室2aを形成した概略構造のものであり、該車室2a内にフロントシート5,リヤシート6が配設されている。
【0015】
上記車体2の車室2aの前側には該車室2aとは区分けされた動力室2bが形成されており、上記車室2aの後部下方には上記フロアパネル4により区分けされた電力室2cが形成されている。
【0016】
上記動力室2bには前輪7を回転駆動する駆動モータ8及び該駆動モータ8を駆動制御するモータコントローラ9が配設されている。また上記フロントシート5下方のフロアパネル4にはニッケル・水素電池17が配設されている。
【0017】
上記電力室2cには燃料電池システムを構成する部品、主として水素タンク15,燃料電池本体16が配設されており、これらは後述するサブフレーム20に搭載されている。
【0018】
このサブフレーム20は、車両前後方向に延びる左,右の下フレーム部材21,21の後部上方に、前後方向に延びる左,右の上フレーム部材22,22を配設し、該左,右の上フレーム部材22,22の前端部と上記左,右の下フレーム部材21の前後方向中央部とを上下方向に延びる左,右の前柱部材23,23により接続するとともに、左,右の上フレーム部材22,22の前後方向中央部と左,右の下フレーム部材21,21の後端部とを上下方向に延びる中間柱部材24,24により接続した構造となっている。
【0019】
上記左,右の下フレーム部材21の前端面には車幅方向に延びる前クロス部材25が、また前後方向中央部の上記前柱部材23の接続部には中間クロス部材26がそれぞれ架け渡して接続されている。また上記左,右の下フレーム部材21の後端面には車幅方向に延びる後クロス部材27が架け渡して接続されており、該後クロス部材27の左,右端部には後ろ斜め上方に延びる後柱部材28,28が接続されている。
【0020】
上記左,右の後柱部材28,28には車幅方向に延びる補強部材28aが架け渡して接続されており、該補強部材28aには各種の車載部品取付けブラケット28b,28cが接続されている。
【0021】
上記前クロス部材25の両端部には垂直上方に延びた後,車外側に屈曲して延びる前連結部材29,29が接続されている。また上記左,右の上フレーム部材22,22の前端部には車幅方向に延びる中間連結部材30が架け渡して接続されており、該左,右の上フレーム部材22,22の後端部には車幅方向に延びる上クロス部材31が架け渡して接続されている。
【0022】
さらに上記左,右の後柱部材28,28の上端面には垂直上方に延びた後,車外側に屈曲して延びる後連結部材32,32が接続されている。この左,右の後連結部材32,32には門形ブラケット33が架け渡して接続されている。
【0023】
上記左,右の下フレーム部材21,21の前部には上記水素タンク15が車幅方向に向けて搭載されており、該水素タンク15は各支持ブラケット34,35に締結部材(不図示)により締め付け固定されている。また上記左,右の上フレーム部材22には上記燃料電池本体16が車幅方向に向けて搭載されており、該燃料電池本体16は中間連結部材30,上クロス部材31に取付け部材(不図示)により取付け固定されている。
【0024】
上記サブフレーム20は、車両前後方向に延びる左,右のリヤサイドメンバ40,40により吊懸支持されている。この各リヤサイドメンバ40は上向きに開口する断面コ字状のもので、側方から見て、前端部40aと、該前端部40aから後方斜め上向きに傾斜して延びる傾斜部40bと、該傾斜部40bの後端から後方に略水平に延びる水平部40cとを有している。
【0025】
上記水平部40cの下方に後輪41が配設されており、この後輪41を懸架支持するリヤサスペンション(不図示)の上端部は上記水平部40cに形成されたサスペンション支持部40dにより支持されている。
【0026】
上記リヤサイドメンバ40は、車両衝突時の入力を軸方向に座屈変形することにより吸収する衝撃吸収機能を備えている。この衝撃吸収機能は、例えば上記リヤサイドメンバ40に長手方向に所定間隔をあけて屈折ビード(不図示)を形成して構成されている。
【0027】
上記サブフレーム20は、これの左,右の前連結部材29をリヤサイドメンバ40の前端部40aに、上記中間連結部材30の左,右端部を傾斜部40bに、さらに上記左,右の後連結部材32を水平部40cの後端部にそれぞれ締結ボルト43,44,45によりリヤサイドメンバ40に結合されている。
【0028】
そして、上記左,右の下フレーム部材21の前後方向中央部には非連続部Aが形成されている。この非連続部Aは下フレーム部材21の中間クロス部材26との接続部から後側部分を取り除くことにより形成されたもので、これにより下フレーム部材21は前側フレーム部21aと後側フレーム部21bとに分離されている。そしてこの前側フレーム部21aと後側フレーム部21bとは、上記非連続部Aを車両上側にて迂回するように形成された迂回部材としての上記前柱部材23,上フレーム部材22,中間柱部材24により連結されている。
【0029】
また上記左,右の上フレーム部材22の後方には非連続部Bが形成されている。この非連続部Bは上フレーム部材22の後端と後連結部材32との間に隙間を設けることにより形成されたものである。この上フレーム部材22と後連結部材32とは、上記非連続部Bを車両下側にて迂回するように形成された迂回部材としての中間柱部材24,後側フレーム部21b,後柱部材28により連結されている。このようにして形成された上記非連続部A,Bに臨む部分に上記リヤサスペンションが配設されている。
【0030】
次に本実施形態の作用効果について説明する。
【0031】
本実施形態の後部車体構造によれば、サブフレーム20の下フレーム部材21の前後方向中間部,及び上フレーム部材22の後部にそれぞれ非連続部A,Bを設けたので、図4に示すように、車両後突時の入力Fによって左,右の後連結部材32が非連続部Bに進入するとともに、左,右の後側フレーム部21bが非連続部Aに進入して屈曲変形することとなり,これに伴ってリヤサイドメンバ40が座屈変形し、もってリヤサイドメンバ40の衝撃吸収機能を十分に発揮させることができる。これにより入力Fが燃料電池本体16や水素タンク15に直接伝わるのを回避でき、破損等の懸念を解消できる。
【0032】
本実施形態では、上記非連続部Aにより分離された前側フレーム部21aと後側フレーム部21bとを非連続部Aの迂回部材を構成する上記前柱部材23,上フレーム部材22,中間柱部材24により連結するとともに、上記非連続部Bにより分離された上フレーム部材22と後連結部材32とを非連続部Bの迂回部材を構成する中間柱部材24,後側フレーム部21b,後柱部材28により連結したので、重量物である水素タンク15,燃料電池本体16に対応した強度,剛性を確保することができ、非連続部A,Bを設けたことによる強度低下の懸念を回避できる。
【0033】
また本実施形態では、左,右リヤサイドメンバ40の非連続部A,Bに臨む部分にリヤサスペンションを配設したので、非連続部A,Bの分だけサブフレーム20の占有空間を縮小することが可能となり、リヤサスペンションを効率良くレイアウトすることができる。
【0034】
なお、上記実施形態では、燃水素タンク15,料電池本体16をサブフレーム20に搭載した電気自動車の場合を説明したが、本発明の車載部品はこれに限られるものではなく、バッテリ等の重量物を搭載した車両にも勿論適用できる。
【0035】
また上記実施形態では、サブフレーム20に水素タンク15,燃料電池本体16の両方を搭載したが、本発明はこれに限られるものではなく、何れか一方,あるいは他の車載部品を搭載する場合にも適用できる。
【図面の簡単な説明】
【図1】本発明の一実施形態による自動車の後部車体構造を説明するためのサブフレームの斜視図である。
【図2】上記サブフレームの平面図である。
【図3】上記サブフレームの側面図である。
【図4】上記サブフレームの後突時の屈曲変形を示す模式図である。
【図5】上記実施形態の電気自動車の概略図である。
【図6】一般的なサブフレームの斜視図である。
【図7】上記サブフレームの側面図である。
【図8】上記サブフレームの屈曲変形を示す模式図である。
【符号の説明】
15 水素タンク(車載部品)
16 燃料電池本体(車載部品)
20 サブフレーム
21 下フレーム部材
21a 前側フレーム部
21b 後側フレーム部
22 上フレーム部材(迂回部材)
23 前柱部材(迂回部材)
24 中間柱部材(迂回部材)
28 後柱部材(迂回部材)
40 リヤサイドメンバ
A,B 非連続部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rear vehicle body structure in which a sub-frame on which on-vehicle components such as a battery and a fuel tank are mounted is supported by a rear side member.
[0002]
[Prior art]
In recent years, the development of electric vehicles equipped with fuel cells and the like that do not require charging has been advanced. In developing this type of electric vehicle, there are cases where an existing vehicle such as a gasoline vehicle is modified. When heavy objects such as fuel cells and hydrogen tanks are mounted on such existing vehicles, a new subframe having strength and rigidity corresponding to these weights and the like is mounted, and on-vehicle components such as fuel cells are provided via the subframe. It is common to adopt a structure in which the left and right rear side members are supported.
[0003]
As the subframe, for example, as shown in FIGS. 6 and 7, there is a structure in which an upper frame member 52 is coupled to a rear portion of a lower frame member 51 formed in a rectangular frame shape by a plurality of column members 53. .
[0004]
Then, a hydrogen tank 55 is mounted and fixed on the front portion of the lower frame member 51 of the subframe 50, and a fuel cell body 56 is mounted and fixed on the upper frame member 52, and left and right front end portions 51a and 51b of the front frame member 51, In some cases, the left and right front end portions 52a and 52b and the rear end portions 52c and 52d of the rear frame member 52 are bolted to the left and right rear side members 60, respectively.
[0005]
[Problems to be solved by the invention]
By the way, since the sub-frame 50 has a structure having strength and rigidity corresponding to the weight of the in-vehicle components 55 and 56, for example, as shown in FIG. In such a case, the subframe 50 hinders the buckling deformation of the rear side member 60, and the collision absorbing structure of the rear side member 60 may not function sufficiently. As a result, there is a concern that the input is directly transmitted to the in-vehicle components 55 and 56 and may be damaged in some cases.
[0006]
The present invention has been made in view of the above situation, and can secure an impact absorbing function of the rear side member when a subframe having high strength and rigidity is coupled to the rear side member. An object of the present invention is to provide a rear body structure of an automobile capable of suppressing the influence on in-vehicle components.
[0007]
According to a first aspect of the present invention, there is provided a rear body structure of a vehicle in which at least a front end portion and a rear end portion of a subframe on which vehicle-mounted components such as a battery and a fuel tank are mounted are supported by left and right rear side members extending in the vehicle front-rear direction. The sub-frame is provided with a discontinuous portion in the middle of the front and rear support portions of the sub-frame , the front frame portion and the rear frame portion separated by the discontinuous portion, and the discontinuous portion on the vehicle upper side. Or it is comprised by connecting with the detour member formed so that it may detour on the lower side, It is characterized by the above-mentioned.
[0008]
According to a second aspect of the present invention, in the first aspect, a rear suspension member is disposed at a portion of the rear side member facing the discontinuous portion.
[0009]
[Effects of the invention]
According to the rear vehicle body structure according to the present invention, a discontinuous portion is provided between the front and rear support portions of the subframe, and the front frame portion and the rear frame portion separated by the discontinuous portion are connected by the bypass member. Therefore, the rear frame part enters the discontinuous part by the input from the rear of the vehicle and is bent and deformed, and thereby, the rear side member is buckled and deformed, so that the shock absorbing function of the rear side member can be sufficiently exhibited. it can. As a result, it is possible to prevent the input from being directly transmitted to the in-vehicle component, for example, the fuel cell or the hydrogen tank, and to prevent the in-vehicle component from being damaged.
[0010]
Further, since the front frame portion and the rear frame portion are connected by a detour member formed so as to detour the discontinuous portion on the upper side or the lower side of the vehicle, the strength and rigidity of the subframe corresponding to the in-vehicle component is ensured. It is possible to avoid the concern of strength reduction due to the provision of the discontinuous portion.
[0011]
In the invention of claim 2, since the rear suspension member is disposed at the portion facing the non-continuous portion of the rear side member, the space occupied by the subframe can be reduced by the amount of the non-continuous portion, and the rear suspension can be efficiently performed. Can be laid out.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0013]
1 to 5 are views for explaining a rear body structure of a fuel cell electric vehicle according to an embodiment of the present invention. FIGS. 1, 2, and 3 are a perspective view, a plan view, and a plan view of a subframe, respectively. 4 is a side view, FIG. 4 is a diagram schematically showing bending deformation of a subframe, and FIG. 5 is a schematic diagram of a fuel cell electric vehicle.
[0014]
In FIG. 5, reference numeral 1 denotes a fuel cell electric vehicle. The vehicle body 2 has a roof panel 3 between upper ends of left and right side panels (not shown) and a floor panel 4 between lower ends. The vehicle has a schematic structure in which a vehicle compartment 2a is formed, and a front seat 5 and a rear seat 6 are provided in the vehicle compartment 2a.
[0015]
A power chamber 2b separated from the vehicle compartment 2a is formed on the front side of the vehicle compartment 2a of the vehicle body 2, and a power chamber 2c separated by the floor panel 4 is provided below the rear portion of the vehicle compartment 2a. Is formed.
[0016]
A drive motor 8 that rotationally drives the front wheels 7 and a motor controller 9 that drives and controls the drive motor 8 are disposed in the power chamber 2b. A nickel / hydrogen battery 17 is disposed on the floor panel 4 below the front seat 5.
[0017]
The power chamber 2c is provided with components constituting the fuel cell system, mainly a hydrogen tank 15 and a fuel cell main body 16, which are mounted on a subframe 20 described later.
[0018]
The sub-frame 20 includes left and right upper frame members 22 and 22 extending in the front-rear direction above the rear portions of the left and right lower frame members 21 and 21 extending in the vehicle front-rear direction. The front end portions of the upper frame members 22 and 22 and the center portions in the front-rear direction of the left and right lower frame members 21 are connected by left and right front column members 23 and 23 extending in the vertical direction, and the left and right upper portions are connected. The frame members 22 and 22 have a structure in which the center portions in the front-rear direction and the rear end portions of the left and right lower frame members 21 and 21 are connected by intermediate column members 24 and 24 extending in the vertical direction.
[0019]
A front cross member 25 extending in the vehicle width direction is bridged on the front end surfaces of the left and right lower frame members 21, and an intermediate cross member 26 is bridged on the connecting portion of the front pillar member 23 in the center in the front-rear direction. It is connected. A rear cross member 27 extending in the vehicle width direction is bridged and connected to the rear end surfaces of the left and right lower frame members 21, and the left and right end portions of the rear cross member 27 extend obliquely rearward and upward. The rear column members 28 are connected.
[0020]
Reinforcing members 28a extending in the vehicle width direction are bridged and connected to the left and right rear pillar members 28, 28, and various on-vehicle component mounting brackets 28b, 28c are connected to the reinforcing members 28a. .
[0021]
Front connecting members 29 and 29 are connected to both ends of the front cross member 25, extending vertically upward and then bending and extending outward. Further, an intermediate connecting member 30 extending in the vehicle width direction is connected to the front end portions of the left and right upper frame members 22 and 22, and the rear end portions of the left and right upper frame members 22 and 22 are connected. An upper cross member 31 extending in the vehicle width direction is bridged and connected.
[0022]
Further, rear connecting members 32, 32 are connected to the upper end surfaces of the left and right rear column members 28, 28, extending vertically upward and then bending and extending outward of the vehicle. A portal bracket 33 is bridged and connected to the left and right rear connecting members 32 and 32.
[0023]
The hydrogen tank 15 is mounted in front of the left and right lower frame members 21 and 21 in the vehicle width direction, and the hydrogen tank 15 is fastened to the support brackets 34 and 35 by fastening members (not shown). It is fixed by tightening. The left and right upper frame members 22 are mounted with the fuel cell main body 16 in the vehicle width direction. The fuel cell main body 16 is attached to an intermediate connecting member 30 and an upper cross member 31 (not shown). ).
[0024]
The sub-frame 20 is suspended and supported by left and right rear side members 40, 40 extending in the vehicle front-rear direction. Each of the rear side members 40 has a U-shaped cross section that opens upward, and when viewed from the side, the front end portion 40a, the inclined portion 40b that extends obliquely rearward and upward from the front end portion 40a, and the inclined portion And a horizontal portion 40c extending substantially horizontally rearward from the rear end of 40b.
[0025]
A rear wheel 41 is disposed below the horizontal portion 40c, and an upper end portion of a rear suspension (not shown) that supports the rear wheel 41 is supported by a suspension support portion 40d formed on the horizontal portion 40c. ing.
[0026]
The rear side member 40 has an impact absorbing function for absorbing the input at the time of vehicle collision by buckling deformation in the axial direction. This shock absorbing function is configured, for example, by forming refractive beads (not shown) in the rear side member 40 at predetermined intervals in the longitudinal direction.
[0027]
The sub-frame 20 has the left and right front connecting members 29 at the front end portion 40a of the rear side member 40, the left and right end portions of the intermediate connecting member 30 at the inclined portion 40b, and the left and right rear connecting portions. The member 32 is coupled to the rear side member 40 by fastening bolts 43, 44, 45 at the rear end of the horizontal portion 40c.
[0028]
And the discontinuous part A is formed in the center part of the front-back direction of the said left and right lower frame member 21. As shown in FIG. The discontinuous portion A is formed by removing the rear side portion from the connection portion of the lower frame member 21 with the intermediate cross member 26, whereby the lower frame member 21 has the front frame portion 21a and the rear frame portion 21b. And are separated. The front frame portion 21a and the rear frame portion 21b are configured such that the front column member 23, the upper frame member 22, and the intermediate column member as bypass members formed so as to bypass the discontinuous portion A on the vehicle upper side. 24 are connected.
[0029]
A discontinuous portion B is formed behind the left and right upper frame members 22. The discontinuous portion B is formed by providing a gap between the rear end of the upper frame member 22 and the rear connecting member 32. The upper frame member 22 and the rear connecting member 32 are an intermediate column member 24, a rear frame portion 21b, and a rear column member 28 as detour members formed so as to detour the discontinuous portion B on the lower side of the vehicle. It is connected by. The rear suspension is disposed in a portion facing the discontinuous portions A and B formed as described above.
[0030]
Next, the effect of this embodiment is demonstrated.
[0031]
According to the rear vehicle body structure of the present embodiment, the discontinuous portions A and B are provided in the front-rear direction intermediate portion of the lower frame member 21 of the subframe 20 and the rear portion of the upper frame member 22, respectively, as shown in FIG. In addition, the left and right rear connecting members 32 enter the discontinuous portion B and the left and right rear frame portions 21b enter the discontinuous portion A and bend and deform due to the input F at the time of rearward collision of the vehicle. Accordingly, the rear side member 40 is buckled and deformed, so that the shock absorbing function of the rear side member 40 can be fully exhibited. As a result, it is possible to avoid the input F from being directly transmitted to the fuel cell main body 16 and the hydrogen tank 15, and to eliminate concerns such as damage.
[0032]
In the present embodiment, the front frame member 23, the upper frame member 22, and the intermediate column member that constitute the detour member of the discontinuous portion A by the front frame portion 21 a and the rear frame portion 21 b separated by the discontinuous portion A. 24, and the upper frame member 22 and the rear connection member 32 separated by the non-continuous portion B are an intermediate column member 24, a rear frame portion 21b, and a rear column member that constitute a detour member of the non-continuous portion B. Therefore, the strength and rigidity corresponding to the heavy hydrogen tank 15 and the fuel cell main body 16 can be secured, and it is possible to avoid the concern of the strength reduction due to the discontinuous portions A and B being provided.
[0033]
In the present embodiment, since the rear suspension is disposed at the portions facing the non-continuous portions A and B of the left and right rear side members 40, the occupied space of the subframe 20 can be reduced by the amount corresponding to the non-continuous portions A and B. The rear suspension can be laid out efficiently.
[0034]
In the above embodiment, the case of an electric vehicle in which the fuel tank 15 and the battery main body 16 are mounted on the subframe 20 has been described. However, the in-vehicle component of the present invention is not limited to this, and the weight of the battery or the like. Of course, the present invention can also be applied to vehicles equipped with objects.
[0035]
In the above embodiment, both the hydrogen tank 15 and the fuel cell main body 16 are mounted on the subframe 20, but the present invention is not limited to this, and when either one or other in-vehicle parts are mounted. Is also applicable.
[Brief description of the drawings]
FIG. 1 is a perspective view of a subframe for explaining a rear body structure of an automobile according to an embodiment of the present invention.
FIG. 2 is a plan view of the subframe.
FIG. 3 is a side view of the subframe.
FIG. 4 is a schematic diagram showing bending deformation at the time of rear collision of the subframe.
FIG. 5 is a schematic view of the electric vehicle according to the embodiment.
FIG. 6 is a perspective view of a general subframe.
FIG. 7 is a side view of the subframe.
FIG. 8 is a schematic diagram showing bending deformation of the subframe.
[Explanation of symbols]
15 Hydrogen tank (in-vehicle parts)
16 Fuel cell body (in-vehicle parts)
20 Subframe 21 Lower frame member 21a Front frame portion 21b Rear frame portion 22 Upper frame member (bypass member)
23 Front pillar member (bypass member)
24 Intermediate pillar member (bypass member)
28 Rear pillar member (bypass member)
40 Rear side member A, B Non-continuous part

Claims (2)

車両前後方向に延びる左右のリヤサイドメンバによりバッテリ,燃料タンク等の車載部品が搭載されたサブフレームの少なくとも前端部及び後端部を支持するようにした自動車の後部車体構造において、上記サブフレームは、該サブフレームの前,後支持部の中間に非連続部を設け、該非連続部によって分離された前側フレーム部と後側フレーム部とを、上記非連続部を車両上側又は下側にて迂回するように形成された迂回部材により連結することにより構成されていることを特徴とする自動車の後部車体構造。In the rear body structure of an automobile configured to support at least the front end portion and the rear end portion of a subframe on which in-vehicle parts such as a battery and a fuel tank are mounted by left and right rear side members extending in the vehicle front-rear direction, the subframe includes: A discontinuous portion is provided in the middle of the front and rear support portions of the subframe, and the discontinuous portion is bypassed on the vehicle upper side or the lower side, separated from the front frame portion and the rear frame portion separated by the discontinuous portion. A rear vehicle body structure of an automobile characterized by being connected by a bypass member formed as described above. 請求項1において、上記リヤサイドメンバの上記非連続部に臨む部分にリヤサスペンション部材が配設されていることを特徴とする自動車の後部車体構造。  2. The rear body structure of an automobile according to claim 1, wherein a rear suspension member is disposed on a portion of the rear side member facing the discontinuous portion.
JP2001323745A 2001-10-22 2001-10-22 Rear body structure of automobile Expired - Fee Related JP4038036B2 (en)

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Publication number Priority date Publication date Assignee Title
US7070015B2 (en) * 2003-05-12 2006-07-04 Ford Global Technologies Llc Battery mounting system for automotive vehicle
JP4649849B2 (en) 2004-03-02 2011-03-16 トヨタ自動車株式会社 Storage mechanism mounting structure
US7503585B2 (en) 2004-09-08 2009-03-17 Nissan Motor Co., Ltd. Rear vehicle structure
JP4559259B2 (en) * 2005-03-02 2010-10-06 本田技研工業株式会社 Car body rear structure
JP4923508B2 (en) * 2005-10-14 2012-04-25 日産自動車株式会社 Car body rear structure
KR100680722B1 (en) * 2005-11-25 2007-02-08 기아자동차주식회사 Shock absorbing structure for rear impact of fuel cell vehicle
KR100916389B1 (en) 2007-09-03 2009-09-11 현대자동차주식회사 Upper body structure of fuel cell vehicle for floor kick up portion reinforcement
DE102009042513A1 (en) 2009-09-22 2011-03-24 GM Global Technology Operations, Inc., Detroit Vehicle with energy storage area
JP6613839B2 (en) * 2015-11-16 2019-12-04 三菱自動車工業株式会社 Temperature control structure of vehicle battery pack
JP6882837B2 (en) * 2019-01-23 2021-06-02 ダイハツ工業株式会社 Vehicle rear structure

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