JP4442277B2 - Rear body structure of the vehicle - Google Patents

Rear body structure of the vehicle Download PDF

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JP4442277B2
JP4442277B2 JP2004092163A JP2004092163A JP4442277B2 JP 4442277 B2 JP4442277 B2 JP 4442277B2 JP 2004092163 A JP2004092163 A JP 2004092163A JP 2004092163 A JP2004092163 A JP 2004092163A JP 4442277 B2 JP4442277 B2 JP 4442277B2
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vehicle
cross member
floor
vehicle body
rear side
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JP2005271869A (en
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信之 小濱
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Suzuki Motor Co Ltd
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Suzuki Motor Co Ltd
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Description

この発明は車両の後部車体構造に係り、特に、リヤフロアの断面係数を大きくしてリヤフロアの曲げ強度を向上することができ、燃料タンクへの衝撃を緩和することができる車両の後部車体構造に関する。   The present invention relates to a rear vehicle body structure of a vehicle, and more particularly to a rear vehicle body structure of a vehicle that can increase the section modulus of the rear floor to improve the bending strength of the rear floor and reduce the impact on the fuel tank.

車両においては、リヤシート下方に搭載される燃料タンクを後方からの衝撃から保護するために、例えば、図９に示す如き後部車体構造を採用している。図９に示す車両１０２の後部の車体１０４構造は、リヤフロア１０６と、このリヤフロア１０６両側部下面に車体１０４前後方向に沿って設けられたリヤサイドメンバ１０８と、リヤフロア１０６前端に位置し左右のリヤサイドメンバ１０８と連結したフロントクロスメンバ１１０と、このフロントクロスメンバ１１０の後方に位置し左右のリヤサイドメンバ１０８と連結したセンタクロスメンバ１１２とを備えている。   In a vehicle, for example, a rear vehicle body structure as shown in FIG. 9 is employed in order to protect a fuel tank mounted below the rear seat from an impact from the rear. The vehicle body 104 structure at the rear of the vehicle 102 shown in FIG. 9 includes a rear floor 106, rear side members 108 provided on the lower surfaces of both sides of the rear floor 106 along the longitudinal direction of the vehicle body 104, and left and right rear side members positioned at the front end of the rear floor 106. The front cross member 110 is connected to the front cross member 110, and the center cross member 112 is located behind the front cross member 110 and connected to the left and right rear side members 108.

この車両１０２の後部の車体１０４構造は、リヤフロア１０６下方で、かつリヤサイドメンバ１０８とフロントクロスメンバ１１０とセンタクロスメンバ１１２とで囲まれ空間１１４に燃料タンク１１６を搭載することにより、燃料タンク１１６への車体１０４後方からの衝撃を緩和して保護している。   The vehicle body 104 structure at the rear of the vehicle 102 is mounted on the fuel tank 116 by mounting the fuel tank 116 in the space 114 below the rear floor 106 and surrounded by the rear side member 108, the front cross member 110, and the center cross member 112. The impact from the rear of the vehicle body 104 is mitigated and protected.

従来の車両の後部車体構造としては、下方に水素タンクが配置されたリヤフロアの前部上壁とその後部上壁にフロアフロントクロスメンバとフロアリヤクロスメンバとを各々設け、リヤシートのシート本体の前部下面に後部に向かって下方に下がる段差部を形成し、該シート本体の前部をフロアフロントクロスメンバの取付座に、シート本体の後部をフロアリヤクロスメンバの上壁に各々取り付けるものがある。
また、従来の車両の後部車体構造としては、車両前後方向に延びる左右のリヤサイドメンバにより水素タンク、燃料電池本体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、サブフレームの下フレーム部材の中間に非連続部を設け、この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非連続部を上側にて迂回するように配設された迂回部材としての前柱部材、上フレーム部材、中間柱部材により連結するものがある。
特開２００３−２９１８５９号公報 特開２００３−１２７９０７号公報 In the conventional rear body structure of a vehicle, a front front wall and a rear floor cross member are provided on a front upper wall and a rear upper wall of a rear floor where a hydrogen tank is arranged below, respectively, and a front seat body of a rear seat is provided. There is a type in which a stepped portion that descends downward toward the rear is formed on the lower surface of the part, the front part of the seat body is attached to the mounting seat of the floor front cross member, and the rear part of the seat body is attached to the upper wall of the floor rear cross member. .
Further, as a conventional rear body structure of a vehicle, at least the front end portion and the rear end portion of a subframe on which vehicle-mounted parts such as a hydrogen tank and a fuel cell main body are mounted are supported by left and right rear side members extending in the vehicle front-rear direction. In the rear vehicle body structure of the automobile, a discontinuous portion is provided in the middle of the lower frame member of the subframe, and the front frame portion and the rear frame portion separated by the discontinuous portion are detoured on the upper side of the discontinuous portion. Some of them are connected by a front pillar member, an upper frame member, and an intermediate pillar member as bypass members arranged to do so.
JP 2003-291859 A JP 2003-127907 A

ところで、図９に示す従来の車両１０２の後部の車体１０４構造においては、燃料タンク１１６への車体１０４後方からの衝撃を緩和して保護するために、リヤサイドメンバ１０８の断面を図１０に２点鎖線で示すように大きくし、リヤサイドメンバ１０８の強度を上げることにより、保護しようとしていた。   By the way, in the structure of the rear vehicle body 104 of the conventional vehicle 102 shown in FIG. 9, two cross sections of the rear side member 108 are shown in FIG. 10 in order to mitigate and protect the fuel tank 116 from the rear of the vehicle body 104. The size of the rear side member 108 was increased by increasing the size as indicated by the chain line, and the protection was attempted.

ところが、リヤサイドメンバ１０８の断面を大きくすることは、燃料タンク１１６だけでなく、図示しない懸架装置や車輪等の他の車両構成部材との干渉を招くおそれがあり、後部の車体１０４の強度と剛性をスペース上、強度上において効率的に向上することができない問題があった。   However, increasing the cross section of the rear side member 108 may cause interference with not only the fuel tank 116 but also other vehicle components such as a suspension device and wheels (not shown), and the strength and rigidity of the rear vehicle body 104 may be increased. There is a problem that the space cannot be efficiently improved in space and strength.

このため、後部車体の強度と剛性をスペース上、強度上において効率的に向上することができ、これによりリヤフロアの断面係数を大きくしてリヤフロアの曲げ強度を向上することができ、燃料タンクへの後方からの衝撃を緩和して保護することができ車両の後部車体構造の実現が望まれている。   For this reason, the strength and rigidity of the rear vehicle body can be efficiently improved in terms of space and strength, thereby increasing the rear floor section modulus and improving the bending strength of the rear floor. It is desired to realize a rear body structure of a vehicle that can mitigate and protect the impact from the rear.

この発明は、リヤフロアと、このリヤフロア両側部下面に車体前後方向に沿って設けられたリヤサイドメンバと、前記リヤフロア前端に位置し左右のリヤサイドメンバと連結したフロントクロスメンバと、このフロントクロスメンバの後方に位置し左右のリヤサイドメンバに連結したセンタクロスメンバとを備えた車両の後部車体構造において、リヤサイドメンバとフロントクロスメンバとセンタクロスメンバとに連結した追加メンバを備え、前記リヤフロア下方で、かつ前記リヤサイドメンバとフロントクロスメンバとセンタクロスメンバと追加メンバとで囲まれた空間に燃料タンクを搭載し、前記リヤフロア上部にリヤシートが設けられ、前記リヤシートは座面部と背当て部とから構成され、前記座面部が前記リヤフロア上部と前記追加メンバとに固定されていることを特徴とする。 The present invention includes a rear floor, a rear side member provided along the vehicle body longitudinal direction on the lower surfaces of both sides of the rear floor, a front cross member located at the front end of the rear floor and connected to left and right rear side members, and a rear side of the front cross member. The vehicle rear body structure includes a center cross member connected to the left and right rear side members, and includes an additional member connected to the rear side member, the front cross member, and the center cross member, below the rear floor, and A fuel tank is mounted in a space surrounded by a rear side member, a front cross member, a center cross member, and an additional member, a rear seat is provided on the upper portion of the rear floor, and the rear seat includes a seat surface portion and a backrest portion, Seating surface is above the rear floor and the additional Characterized in that it is fixed to the Nba.

この発明の車両の後部車体構造は、後部車体の強度と剛性をスペース上、強度上において効率的に向上することができ、これによりリヤフロアの断面係数を大きくしてリヤフロアの曲げ強度を向上することができ、燃料タンクへの後方からの衝撃を緩和して保護することができる。 The rear vehicle body structure of the vehicle according to the present invention can efficiently improve the strength and rigidity of the rear vehicle body in terms of space and strength, thereby increasing the section modulus of the rear floor and improving the bending strength of the rear floor. It is possible to reduce and protect the impact on the fuel tank from the rear.

この発明の車両の後部車体構造は、後部車体を構成する各メンバに連結される追加メンバを設けることにより、後部車体の強度と剛性をスペース上、強度上において効率的に向上し、リヤフロアの曲げ強度を向上して燃料タンクを保護するものである。
以下図面に基づいて、この発明の実施例を説明する。 In the rear vehicle body structure of the vehicle according to the present invention, by providing an additional member connected to each member constituting the rear vehicle body, the strength and rigidity of the rear vehicle body are efficiently improved in terms of space and strength, and the rear floor is bent. The strength is improved and the fuel tank is protected.
Embodiments of the present invention will be described below with reference to the drawings.

図１〜図５は、この発明の実施例を示すものである。図４・図５において、２は車両、４は車体である。この車両２の後部の車体４構造は、リヤフロア６と、このリヤフロア６の両側部下面に車体４前後方向に沿って設けられたリヤサイドメンバ８と、リヤフロア６の前端に位置し左右のリヤサイドメンバ８と連結したフロントクロスメンバ１０と、このフロントクロスメンバ１０の後方に位置し左右のリヤサイドメンバ８の途中に連結したセンタクロスメンバ１２とを備えている。   1 to 5 show an embodiment of the present invention. 4 and 5, reference numeral 2 denotes a vehicle, and 4 denotes a vehicle body. The vehicle body 4 structure at the rear portion of the vehicle 2 includes a rear floor 6, rear side members 8 provided on the lower surfaces of both side portions of the rear floor 6 along the longitudinal direction of the vehicle body 4, and left and right rear side members 8 positioned at the front end of the rear floor 6. And a center cross member 12 located behind the front cross member 10 and connected in the middle of the left and right rear side members 8.

また、この車両２の後部の車体４構造は、センタクロスメンバ１２の後方に位置し左右のリヤサイドメンバ８の後端に連結したテールメンバ１４を備え、フロントクロスメンバ１０の下端にリヤフロア６よりも下方に位置するフロントフロア１６の後端を連結している。車両２は、車体４後部側方のボディを形成するリヤサイドパネル１８と車体４後部のボディ開口を開閉するバックドア２０とを備え、車室２２内のリヤフロア６上部にリヤシート２４が設けられている。   The vehicle body 4 structure at the rear portion of the vehicle 2 includes a tail member 14 that is located behind the center cross member 12 and connected to the rear ends of the left and right rear side members 8, and is lower than the rear floor 6 at the lower end of the front cross member 10. The rear end of the front floor 16 located below is connected. The vehicle 2 includes a rear side panel 18 that forms a body on the rear side of the vehicle body 4 and a back door 20 that opens and closes a body opening at the rear of the vehicle body 4, and a rear seat 24 is provided above the rear floor 6 in the vehicle interior 22. .

前記左右のリヤサイドメンバ８は、図１・図２に示す如く、テールメンバ１４の両端から車体４前方に向かい略水平に延設されてセンタクロスメンバ１２の両端が連結された部位に達するサイドメンバ後側部８Ｒと、サイドメンバ後側部８Ｒの前端から前下方に急傾斜して延設されたサイドメンバ中間部８Ｍと、サイドメンバ中間部８Ｍの前端から前下方に緩傾斜して延設されてフロントクロスメンバ１０の下端に達するサイドメンバ前側部８Ｆとから構成される。   As shown in FIGS. 1 and 2, the left and right rear side members 8 extend substantially horizontally from both ends of the tail member 14 toward the front of the vehicle body 4 and reach side portions where both ends of the center cross member 12 are connected. The rear side portion 8R, the side member intermediate portion 8M extending from the front end of the side member rear side portion 8R so as to incline forward and downward, and the side member intermediate portion 8M extending from the front end of the side member intermediate portion 8M toward the front lower side. The side member front side portion 8F that reaches the lower end of the front cross member 10 is formed.

前記テールメンバ１４は、断面略逆Ｕ字形状に形成され、車体４幅方向の両端を左右のサイドメンバ後側部８Ｒの後端に連結している。前記センタクロスメンバ１２は、断面略Ｕ字形状に形成され、車体４幅方向の両端を左右のサイドメンバ後側部８Ｒとサイドメンバ中間部８Ｍとが連絡する部位に連結している。前記フロントクロスメンバ１０は、下端に対して上端が後方に折曲されて指向する断面略逆Ｌ字形状に形成され、車体４幅方向の下端を左右のサイドメンバ前側部８Ｆに連結している。   The tail member 14 is formed in a substantially inverted U-shaped cross section, and connects both ends in the width direction of the vehicle body 4 to the rear ends of the left and right side member rear side portions 8R. The center cross member 12 is formed in a substantially U-shaped cross section, and both ends of the vehicle body 4 in the width direction are connected to portions where the left and right side member rear side portions 8R and the side member intermediate portion 8M communicate with each other. The front cross member 10 is formed in a substantially inverted L-shaped cross-section with the upper end bent backward with respect to the lower end, and the lower end in the vehicle body 4 width direction is connected to the left and right side member front side portions 8F. .

前記リヤフロア６は、フロントクロスメンバ１０から車体４後方に向かいセンタクロスメンバ１２を越えてテールメンバ１４に達するように略水平に配設され、フロントクロスメンバ１０からセンタクロスメンバ１２までのフロア前側部６Ｆと、センタクロスメンバ１２からテールメンバ１４までのフロア後側部６Ｒとから構成される。   The rear floor 6 is disposed substantially horizontally so as to reach the tail member 14 from the front cross member 10 toward the rear of the vehicle body 4, beyond the center cross member 12, and from the front cross member 10 to the center cross member 12. 6F and the floor rear side 6R from the center cross member 12 to the tail member 14 are comprised.

フロア後側部６Ｒは、略四角板形状に形成され、車体４前後方向の両端をセンタクロスメンバ１２とテールメンバ１４とに連結され、車体４幅方向の両側を左右のサイドメンバ後側部８Ｒに連結される。   The floor rear side portion 6R is formed in a substantially square plate shape, both ends in the front-rear direction of the vehicle body 4 are connected to the center cross member 12 and the tail member 14, and both sides in the width direction of the vehicle body 4 are connected to the left and right side member rear side portions 8R. Connected to

フロア前側部６Ｆは、略四角板形状に形成され、図２・図３に示す如く、車体４前後方向の前端にフロントクロスメンバ１０を覆うように下方に折曲垂下する前壁部６Ｆ−１を設け、車体４幅方向の両側に下降傾斜する傾斜部６Ｆ−２を設け、この傾斜部６Ｆ−２の下端に水平に延長される延長部６Ｆ−３を設けている。フロア前側部６Ｆは、車体４前後方向の前端の前壁部６Ｆ−１をフロントクロスメンバ１０の下端に連結されるとともに、車体４前後方向の後端をセンタクロスメンバ１２に連結され、車体４幅方向の両側の傾斜部６Ｆ−２下端の延長部６Ｆ−３を左右のサイドメンバ中間部８Ｍとサイドメンバ前側部８Ｆ後端とに連結される。   The floor front side part 6F is formed in a substantially square plate shape, and as shown in FIGS. Are provided on both sides of the vehicle body 4 in the width direction, and an extending portion 6F-3 extending horizontally is provided at the lower end of the inclined portion 6F-2. The floor front side portion 6F is connected to the front wall portion 6F-1 at the front end in the front-rear direction of the vehicle body 4 to the lower end of the front cross member 10, and to the center cross member 12 at the rear end in the front-rear direction of the vehicle body 4. The extension part 6F-3 at the lower end of the inclined part 6F-2 on both sides in the width direction is connected to the left and right side member intermediate parts 8M and the rear end of the side member front side part 8F.

この車両２の後部の車体４構造は、図１・図２に示す如く、リヤサイドメンバ８とフロントクロスメンバ１０とセンタクロスメンバ１２とに連結した追加メンバ２６を備えている。左右の追加メンバ２６は、略長四角形状を備えた部分２６ａと略三角形状を備えた部分２６ｂとからなり、左右のリヤサイドメンバ８のサイドメンバ後側部８Ｒとサイドメンバ中間部８Ｍとが連絡し、かつセンタクロスメンバ１２の両端が連結する部位に後端を連結し、前端をフロントクロスメンバ１０の上端に連結している。左右の追加メンバ２６の略長四角形状を備えた部分２６ａには、リヤフロア６のフロア前側部６Ｆの車体４幅方向の両側部が連結される。また、左右の追加メンバ２６の後側の略三角形状を備えた部分２６ｂは、サイドメンバ中間部８Ｍと連結されている。   The vehicle body 4 structure at the rear portion of the vehicle 2 includes an additional member 26 connected to the rear side member 8, the front cross member 10, and the center cross member 12, as shown in FIGS. The left and right additional members 26 include a portion 26a having a substantially long rectangular shape and a portion 26b having a substantially triangular shape, and the side member rear side portion 8R and the side member intermediate portion 8M of the left and right rear side members 8 communicate with each other. In addition, the rear end is connected to a portion where both ends of the center cross member 12 are connected, and the front end is connected to the upper end of the front cross member 10. Both side portions in the vehicle body 4 width direction of the floor front side portion 6F of the rear floor 6 are connected to a portion 26a having a substantially long rectangular shape of the left and right additional members 26. A portion 26b having a substantially triangular shape on the rear side of the left and right additional members 26 is connected to the side member intermediate portion 8M.

また、この車両２の後部の車体４構造は、図２に示す如く、リヤフロア６下方で、かつリヤサイドメンバ８とフロントクロスメンバ１０とセンタクロスメンバ１２と追加メンバ２６とで囲まれた空間３０に燃料タンク３２を搭載している。この実施例においては、円柱形状に形成された２本の燃料タンク３２を、長手方向を車体４幅方向に指向させ、かつ前後に並列して空間３０に搭載している。   Further, as shown in FIG. 2, the vehicle body 4 structure at the rear portion of the vehicle 2 is in a space 30 below the rear floor 6 and surrounded by the rear side member 8, the front cross member 10, the center cross member 12, and the additional member 26. A fuel tank 32 is mounted. In this embodiment, two fuel tanks 32 formed in a columnar shape are mounted in the space 30 with the longitudinal direction oriented in the width direction of the vehicle body 4 and in parallel in the front-rear direction.

さらに、この車両２の後部の車体４構造は、図５に示す如く、リヤフロア６上部にリヤシート２４が設けられ、追加メンバ２６にリヤシート２４の一部が固定されている。リヤシート２４は、座面部２４Ｓと背当て部２４Ｂとから構成され、リヤフロア６のフロア前側部６Ｆ上部に座面部２４Ｓを当接させ、背当て部２４Ｂの下端部を追加メンバ２６の後端にヒンジ３４を介して固定されている。リヤシート２４の背当て部２４Ｂは、ヒンジ３４により倒立（リクライニング）可能に追加メンバ２６に固定される。   Further, in the vehicle body 4 structure at the rear portion of the vehicle 2, as shown in FIG. 5, a rear seat 24 is provided on the rear floor 6, and a part of the rear seat 24 is fixed to the additional member 26. The rear seat 24 includes a seat surface portion 24S and a backrest portion 24B. The seat surface portion 24S is brought into contact with the upper portion of the floor front side portion 6F of the rear floor 6, and the lower end portion of the backrest portion 24B is hinged to the rear end of the additional member 26. 34 is fixed. The backrest portion 24B of the rear seat 24 is fixed to the additional member 26 by a hinge 34 so as to be inverted (reclining).

このように、この車両２の後部の車体４構造は、リヤフロ６ア両側部下面に車体４前後方向に沿って設けられたリヤサイドメンバ８と、リヤフロア６前端に位置し左右のリヤサイドメンバ８と連結したフロントクロスメンバ１０と、フロントクロスメンバ１０の後方に位置し左右のリヤサイドメンバ８に連結したセンタクロスメンバ１２とを、追加メンバ２６によって連結している。   As described above, the vehicle body 4 structure at the rear portion of the vehicle 2 is connected to the rear side member 8 provided along the longitudinal direction of the vehicle body 4 on the lower surface of both sides of the rear flow 6 and the left and right rear side members 8 positioned at the front end of the rear floor 6. The front cross member 10 and the center cross member 12 located behind the front cross member 10 and connected to the left and right rear side members 8 are connected by an additional member 26.

これにより、この車両２の後部の車体４構造は、燃料タンク３２だけでなく、図示しない懸架装置や車輪等の他の車両構成部材との干渉を招くことなく、後部の車体４の強度と剛性をスペース上、強度上において効率的に向上することができる。   Thus, the structure of the rear body 4 of the vehicle 2 is not limited to the fuel tank 32, but also with other vehicle components such as a suspension device and wheels (not shown). Can be efficiently improved in terms of space and strength.

このため、この車両２の後部の車体４構造は、リヤフロア６の断面係数を大きくしてリヤフロア６の曲げ強度を向上することができ、リヤフロア６下方に搭載された燃料タンク３２への後方からの衝撃を緩和して保護することができる。   Therefore, the vehicle body 4 structure at the rear part of the vehicle 2 can increase the bending modulus of the rear floor 6 by increasing the section modulus of the rear floor 6, and the rear side of the fuel tank 32 mounted below the rear floor 6 can be improved. Impact can be mitigated and protected.

また、この車両２の後部の車体４構造は、リヤフロア６下方で、かつリヤサイドメンバ８とフロントクロスメンバ１０とセンタクロスメンバ１２と追加メンバ２６とで囲まれた空間３０に燃料タンク３２を搭載していることにより、車両２の後部領域の中でも、強度の高い領域に燃料タンク３２を配置することができ、燃料タンク３０への後方からの衝撃を緩和して保護をすることができる。   The vehicle body 4 structure at the rear of the vehicle 2 includes a fuel tank 32 mounted in a space 30 below the rear floor 6 and surrounded by the rear side member 8, the front cross member 10, the center cross member 12, and the additional member 26. As a result, the fuel tank 32 can be arranged in a high-strength region in the rear region of the vehicle 2, and the impact from the rear on the fuel tank 30 can be reduced and protected.

さらに、この車両２の後部の車体４構造は、リヤフロア６上部にリヤシート２４が設けられ、追加メンバ２６にリヤシート２４の一部が固定されていることにより、追加メンバ２６によりリヤシート２４の座面部２４Ｓが当接される当接面（図５の斜線域）を確保することができ、追加メンバ２６をリヤシート２４の機能を高める（リクライニング可能）ためにも使用することが可能となる。   Further, in the vehicle body 4 structure at the rear part of the vehicle 2, a rear seat 24 is provided on the upper part of the rear floor 6, and a part of the rear seat 24 is fixed to the additional member 26. 5 can be ensured, and the additional member 26 can be used to enhance the function of the rear seat 24 (can be reclined).

図６は、第１の変形例を示すものである。この車両２の後部の車体４構造は、リヤサイドメンバ８とフロントクロスメンバ１０とセンタクロスメンバ１２とに連結する追加メンバ２６を車室２２外のリヤパネル６下部に設けたものである。   FIG. 6 shows a first modification. The vehicle body 4 structure at the rear portion of the vehicle 2 is provided with an additional member 26 connected to the rear side member 8, the front cross member 10, and the center cross member 12 at the lower part of the rear panel 6 outside the vehicle compartment 22.

この車両２の後部の車体４構造は、薄板で構成されるリヤフロア６を間にはさむことなく、リヤサイドメンバ８とフロントクロスメンバ１０とセンタクロスメンバ１２とを追加メンバ２６によって直接連結していることにより、各メンバの確実な接合が可能となる。   In the vehicle body 4 structure at the rear of the vehicle 2, the rear side member 8, the front cross member 10, and the center cross member 12 are directly connected by the additional member 26 without interposing the rear floor 6 formed of a thin plate. Thus, each member can be securely joined.

このため、この車両２の後部の車体４構造は、リヤフロア６の曲げ強度をさらに向上することができ、リヤフロア６下方に搭載された燃料タンク３２への後方からの衝撃をより緩和して保護することができる。   For this reason, the vehicle body 4 structure at the rear portion of the vehicle 2 can further improve the bending strength of the rear floor 6, further mitigating and protecting the impact from the rear on the fuel tank 32 mounted below the rear floor 6. be able to.

図７は、第２の変形例を示すものである。この車両２の後部の車体４構造は、追加メンバ２６の略長四角形状を備えた部分２６ａとリヤサイドメンバ８のサイドメンバ前側部８Ｆとに連結されるともに追加メンバ２６とサイドメンバ前側部８Ｆとの間の傾斜部６Ｆ−２に連結される複数本の補強部材３６を設けたものである。   FIG. 7 shows a second modification. The vehicle body 4 structure at the rear portion of the vehicle 2 is connected to a portion 26a having a substantially long rectangular shape of the additional member 26 and the side member front side portion 8F of the rear side member 8, and the additional member 26 and the side member front side portion 8F. A plurality of reinforcing members 36 connected to the inclined portion 6F-2 are provided.

この車両２の後部の車体４構造は、追加メンバ２６とサイドメンバ前側部８Ｆと傾斜部６Ｆ−２とに複数本の補強部材３６を連結して設けたことにより、後部の車体４の強度と剛性をスペース上、強度上においてさらに効率的に向上することができ、リヤフロア６の断面係数を大きくしてリヤフロア６の曲げ強度を向上することができ、燃料タンク３２への後方からの衝撃を緩和して保護することができる。   The structure of the vehicle body 4 at the rear of the vehicle 2 includes a plurality of reinforcing members 36 connected to the additional member 26, the side member front side 8F, and the inclined portion 6F-2. The rigidity can be improved more efficiently in terms of space and strength, the section modulus of the rear floor 6 can be increased, the bending strength of the rear floor 6 can be improved, and the impact on the fuel tank 32 from the rear can be reduced. And can be protected.

図８は、第３の変形例を示すものである。この車両２の後部の車体４構造は、左右のリヤサイドメンバ８のサイドメンバ後側部８Ｒの前端からサイドメンバ中間部８Ｍが後側の燃料タンク３２の側面を径方向に横切るように前下方に急激に傾斜させて延設し、サイドメンバ中間部８Ｍの前端からサイドメンバ前側部８Ｆを２つの燃料タンク３２の各側面を径方向に横切り前方のフロントクロスメンバ１０の下端に達するように水平に延設し、追加メンバ２６の略長四角形状を備えた部分２６ａの前端とサイドメンバ前側部８Ｆの後端とに連結される補強部材３８を設けたものである。   FIG. 8 shows a third modification. The vehicle body 4 structure at the rear portion of the vehicle 2 extends downward from the front end of the side member rear side portion 8R of the left and right rear side members 8 so that the side member intermediate portion 8M crosses the side surface of the rear fuel tank 32 in the radial direction. The side member front side portion 8F is horizontally extended from the front end of the side member intermediate portion 8M across the side surfaces of the two fuel tanks 32 to reach the lower end of the front cross member 10 in front. A reinforcing member 38 that extends and is connected to the front end of the portion 26a having a substantially long rectangular shape of the additional member 26 and the rear end of the side member front side portion 8F is provided.

この車両２の後部の車体４構造は、追加メンバ２６の前端とサイドメンバ前側部８Ｆの後端とに補強部材３８を連結して設けたことにより、後部の車体４の強度と剛性をスペース上、強度上においてさらに効率的に向上することができ、リヤフロア６の断面係数を大きくしてリヤフロア６の曲げ強度を向上することができ、燃料タンク３２への後方からの衝撃を緩和して保護することができ、また、左右のリヤサイドメンバ８のサイドメンバ中間部８Ｍとサイドメンバ前側部８Ｆとを燃料タンク３２の各側面を横切るように配設していることにより、横方向からの衝撃から燃料タンク３２を保護することができる。   The vehicle body 4 structure at the rear portion of the vehicle 2 is provided with a reinforcing member 38 connected to the front end of the additional member 26 and the rear end of the side member front side portion 8F, thereby increasing the strength and rigidity of the rear vehicle body 4 in space. Further, the strength can be improved more efficiently, the section modulus of the rear floor 6 can be increased, the bending strength of the rear floor 6 can be improved, and the impact from the rear to the fuel tank 32 can be mitigated and protected. Further, the side member intermediate portion 8M and the side member front side portion 8F of the left and right rear side members 8 are disposed so as to cross the respective side surfaces of the fuel tank 32, so that the fuel from the impact from the lateral direction can be obtained. The tank 32 can be protected.

この発明の車両の後部車体構造は、リヤフロア両側部下面のリヤサイドメンバとフロントクロスメンバとセンタクロスメンバとを追加メンバによって連結し、リヤフロアの曲げ強度を向上して燃料タンクへの後方からの衝撃を緩和して保護することができるものであり、従来のガソリン自動車のガソリンを貯留する燃料タンクだけでなく、燃料電池自動車の水素を貯留する燃料タンクの保護にも適用することができる。   In the rear body structure of the vehicle according to the present invention, the rear side member, the front cross member, and the center cross member on the lower surfaces of the both sides of the rear floor are connected by the additional members, the bending strength of the rear floor is improved, and the impact from the rear to the fuel tank is prevented. It can be relaxed and protected, and can be applied not only to the fuel tank that stores gasoline of conventional gasoline automobiles, but also to the protection of fuel tanks that store hydrogen of fuel cell automobiles.

実施例を示す車両の後部車体構造の各メンバの斜視図である。It is a perspective view of each member of the rear body structure of a vehicle showing an embodiment. 図１の矢印ＩＩによる側面図である。It is a side view by the arrow II of FIG. 図２のＩＩＩ−ＩＩＩ線による断面図である。It is sectional drawing by the III-III line of FIG. 車両の後部車体構造の斜視図である。1 is a perspective view of a rear body structure of a vehicle. リヤフロアの要部拡大斜視図である。It is a principal part expansion perspective view of a rear floor. 第１の変形例を示すリヤフロアの断面図である。It is sectional drawing of the rear floor which shows a 1st modification. 第２の変形例を示す後部車体構造の側面図である。FIG. 10 is a side view of a rear vehicle body structure showing a second modification. 第３の変形例を示す後部車体構造の側面図である。It is a side view of the rear body structure showing the 3rd modification. 従来例を示す車両の後部車体構造の側面図である。It is a side view of the rear part vehicle body structure which shows a prior art example. 図９のＸ−Ｘ線による断面図である。It is sectional drawing by the XX line of FIG.

符号の説明Explanation of symbols

２ 車両
４ 車体
６ リヤフロア
８ リヤサイドメンバ
１０ フロントクロスメンバ
１２ センタクロスメンバ
１４ テールメンバ
２２ 車室
２４ リヤシート
２６ 追加メンバ
３０ 空間
３２ 燃料タンク
３４ ヒンジ 2 Vehicle 4 Car body 6 Rear floor 8 Rear side member 10 Front cross member 12 Center cross member 14 Tail member 22 Car compartment 24 Rear seat 26 Additional member 30 Space 32 Fuel tank 34 Hinge

Claims (2)

リヤフロアと、
このリヤフロア両側部下面に車体前後方向に沿って設けられたリヤサイドメンバと、
前記リヤフロア前端に位置し左右のリヤサイドメンバと連結したフロントクロスメンバと、
このフロントクロスメンバの後方に位置し左右のリヤサイドメンバに連結したセンタクロスメンバとを備えた車両の後部車体構造において、
リヤサイドメンバとフロントクロスメンバとセンタクロスメンバとに連結した追加メンバを備え、
前記リヤフロア下方で、かつ前記リヤサイドメンバとフロントクロスメンバとセンタクロスメンバと追加メンバとで囲まれた空間に燃料タンクを搭載し、
前記リヤフロア上部にリヤシートが設けられ、前記リヤシートは座面部と背当て部とから構成され、前記座面部が前記リヤフロア上部と前記追加メンバとに固定されていることを特徴とする車両の後部車体構造。 The rear floor,
Rear side members provided along the longitudinal direction of the vehicle body on the lower surfaces of both sides of the rear floor,
A front cross member located at the front end of the rear floor and connected to left and right rear side members;
In the rear vehicle body structure including a center cross member that is located behind the front cross member and is connected to the left and right rear side members,
With an additional member connected to the rear side member, front cross member, and center cross member ,
A fuel tank is mounted in a space below the rear floor and surrounded by the rear side member, the front cross member, the center cross member, and the additional member,
A rear body structure of a vehicle , wherein a rear seat is provided at an upper portion of the rear floor, the rear seat includes a seat surface portion and a backrest portion, and the seat surface portion is fixed to the upper portion of the rear floor and the additional member. . 前記リヤシートの前記背当て部の下端部は、前記追加メンバにヒンジを介して固定されていることを特徴とする請求項１に記載の車両の後部車体構造。 The rear body structure of the vehicle according to claim 1 , wherein a lower end portion of the backrest portion of the rear seat is fixed to the additional member via a hinge .
JP2004092163A 2004-03-26 2004-03-26 Rear body structure of the vehicle Expired - Fee Related JP4442277B2 (en)

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