JP4923508B2

JP4923508B2 - Car body rear structure

Info

Publication number: JP4923508B2
Application number: JP2005300300A
Authority: JP
Inventors: 努鈴木; 聡重松; 夏樹黒岩; 康宏塚尾
Original assignee: Nissan Motor Co Ltd
Current assignee: Nissan Motor Co Ltd
Priority date: 2005-10-14
Filing date: 2005-10-14
Publication date: 2012-04-25
Anticipated expiration: 2025-10-14
Also published as: JP2007106306A

Description

本発明は、燃料容器を支持する容器フレームを、車両の下面に取り付けるとともに、容器フレームより車両後方側の車両の下面にリヤフレームを取り付けた車体後部構造に関する。 The present invention relates to a vehicle body rear structure in which a container frame that supports a fuel container is attached to the lower surface of a vehicle, and a rear frame is attached to the lower surface of the vehicle on the vehicle rear side of the container frame.

従来の車体後部構造として、例えば下記特許文献１には、燃料電池自動車に搭載する燃料タンクとして水素タンクを支持するサブフレームを、車両下部にて車両前後方向に延びる左右のリヤサイドメンバに結合する方法が記載されている。サブフレームは、その前部に燃料タンクを搭載し、前部と後部の上部における連結部上に燃料電池を搭載している。 As a conventional vehicle body rear structure, for example, in Patent Document 1 below, a method of joining a subframe that supports a hydrogen tank as a fuel tank mounted on a fuel cell vehicle to left and right rear side members extending in the vehicle front-rear direction at the lower part of the vehicle. Is described. The subframe has a fuel tank mounted on the front part thereof, and a fuel cell mounted on a connecting part at the upper part of the front part and the rear part.

そして、サブフレームの前部と後部との間の下部側部分に、非連続部を設けることで、車両が後方から衝撃を受けた際に、サブフレームが座屈変形し、リヤサイドメンバの座屈変形が可能となって、リヤサイドメンバの衝撃吸収機能を確保するようにしている。
特開２００３−１２７９０７号公報 In addition, by providing a discontinuous part in the lower part between the front part and the rear part of the subframe, the subframe buckles and deforms when the vehicle receives an impact from the rear, and the rear side member buckles. Deformation is possible, and the shock absorbing function of the rear side member is ensured.
JP 2003-127907 A

ところで、水素タンクには周辺部品である水素バルブなどの水素系機能部品を設ける必要があり、この水素系機能部品を水素タンクの車両後方側の領域に配置した場合には、車両が後方から衝撃を受けてサブフレームが座屈変形したときに、この変形により車両前方へ移動するサブフレームが、水素タンクに接近して水素系機能部品に干渉することになり、このため水素系機能部品を水素タンク車両後方の領域に設置できないという問題がある。 By the way, it is necessary to provide hydrogen-based functional parts such as hydrogen valves, which are peripheral parts, in the hydrogen tank. If this hydrogen-based functional part is placed in the area on the rear side of the hydrogen tank, the vehicle will impact from behind. When the subframe is buckled and received, the subframe moving forward due to this deformation approaches the hydrogen tank and interferes with the hydrogen functional parts. There is a problem that it cannot be installed in the area behind the tank vehicle.

そこで、本発明は、燃料容器を搭載する容器フレームの車両後方に配置したリヤフレームが座屈変形しても、この変形したリヤフレームが、燃料容器の車両後方の領域に配置した周辺部品に干渉しないようにすることを目的としている。 In view of the above, according to the present invention, even if the rear frame disposed on the rear side of the container frame on which the fuel container is mounted buckles and deforms, the deformed rear frame interferes with peripheral components disposed on the rear area of the fuel container on the vehicle. The purpose is not to.

本発明は、水素タンクを支持する容器フレームを、車両の下面に取り付けるとともに、前記容器フレームより車両後方側の車両の下面に、前記容器フレームに比較して強度が低く車両前後方向に延びるパイプ部材を備えるリヤフレームを取り付け、このリヤフレームと前記容器フレームとを、容器フレームと同等の強度を備える前後フレーム連結部材により連結し、前記水素タンクの後方には水素タンクに付属する周辺部品である機能部品を配置したことを最も主要な特徴とする。 The present invention attaches a container frame that supports a hydrogen tank to a lower surface of a vehicle, and has a pipe member that is lower in strength than the container frame and extends in the vehicle front-rear direction on the lower surface of the vehicle behind the container frame. attaching a rear frame comprising, a the rear frame and the container frame, connected by front and rear frame connecting member comprising the same intensity and the container frame, the rear of the hydrogen tank is a peripheral component that is included with the hydrogen tank functions The most important feature is the arrangement of parts.

本発明によれば、車両が後方から衝撃を受けてリヤフレームが座屈変形しても、座屈変形しやすいリヤフレームに比較して、容器フレームと同様に強度の高い前後フレーム連結部材が、水素タンクの車両後方側の領域に配置した周辺部品を保護し、座屈変形して車両前方へ移動するリヤフレームの周辺部品への干渉を防止することができる。 According to the present invention, even if the rear frame is buckled and deformed due to an impact from the rear, the front and rear frame connecting members having high strength in the same manner as the container frame compared to the rear frame that is easily buckled and deformed, It is possible to protect the peripheral parts arranged in the area on the rear side of the hydrogen tank and prevent interference with the peripheral parts of the rear frame that buckles and moves forward.

以下、本発明の実施の形態を図面に基づき説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の一実施形態に係わる車体後部構造の側面図、図２は、図１の車体後部構造を車体下方から見た斜視図、図３は、図１の底面図である。なお、後述する図も含めた各図中の矢印ＦＲで示す方向が車両前方で、同ＵＰＲで示す方向が車両上方で、同ＬＨで示す方向が車両左方である。ただし、これら図１〜図３では、後述の図７に示すリヤアンダカバー１９および水素タンクアンダカバー２３は省略している。 1 is a side view of a vehicle body rear structure according to an embodiment of the present invention, FIG. 2 is a perspective view of the vehicle body rear structure of FIG. 1 as viewed from below the vehicle body, and FIG. 3 is a bottom view of FIG. In addition, the direction shown by the arrow FR in each figure including the figure mentioned later is the vehicle front, the direction shown by the UPR is the vehicle upper side, and the direction shown by the LH is the left side of the vehicle. However, in these FIGS. 1 to 3, a rear under cover 19 and a hydrogen tank under cover 23 shown in FIG. 7 to be described later are omitted.

上記した車体後部構造を備える車両としては、例えば図示しない燃料電池を搭載した燃料電池車両でよく、ここでの燃料電池車両は、燃料電池に燃料として供給する水素を収容する燃料容器としての円筒形状の水素タンク１を車両のリヤフロアパネル３の下部に、容器フレームとしてのタンクフレーム５を介して搭載している。なお、図２，図３では、水素タンク１を省略している。 The vehicle having the vehicle body rear structure described above may be, for example, a fuel cell vehicle equipped with a fuel cell (not shown), and the fuel cell vehicle here has a cylindrical shape as a fuel container for storing hydrogen to be supplied to the fuel cell as fuel. The hydrogen tank 1 is mounted below the rear floor panel 3 of the vehicle via a tank frame 5 as a container frame. 2 and 3, the hydrogen tank 1 is omitted.

タンクフレーム５は、図４に斜視図として示すように、水素タンク１のほぼ下半部を受容する形状のフレーム構造体であり、水素タンク１における円筒部の車両前方側の一側面に位置する前フレーム５ａと、同円筒部の車両後方側の他側面に位置する後フレーム５ｂと、後フレーム５ｂの車幅方向両端から前方に屈曲して先端が前フレーム５ａに連結する、水素タンク１の長手方向両端の側部に位置する左，右側部フレーム５ｃ，５ｄと、前フレーム５ａと後フレーム５ｂとの間にて水素タンク１の下部に位置する前，後下部フレーム５ｅ，５ｆとをそれぞれ備え、これら各フレームは中空のパイプ材で構成している。前，後下部フレーム５ｅ，５ｆは、車幅方向両端が上方に屈曲してその先端を左，右側部フレーム５ｃ，５ｄに連結している。 As shown in a perspective view in FIG. 4, the tank frame 5 is a frame structure having a shape that receives substantially the lower half of the hydrogen tank 1, and is positioned on one side of the hydrogen tank 1 on the vehicle front side of the cylindrical portion. A front frame 5a, a rear frame 5b located on the other side of the cylindrical portion on the rear side of the vehicle, and a hydrogen tank 1 that is bent forward from both ends in the vehicle width direction of the rear frame 5b and connected to the front frame 5a. Left and right side frames 5c and 5d located on the sides at both ends in the longitudinal direction, and front and rear lower frames 5e and 5f located below the hydrogen tank 1 between the front frame 5a and the rear frame 5b, respectively. Each of these frames is made of a hollow pipe material. The front and rear lower frames 5e and 5f are bent at both ends in the vehicle width direction and have their tips connected to the left and right frames 5c and 5d.

また、タンクフレーム５は、前，後フレーム５ａ，５ｂおよび前，後下部フレーム５ｅ，５ｆにわたってほぼ半円弧状に形成した、車両前後方向に延びる容器フレーム部材としての支持フレーム５ｇ，５ｈを有し、支持フレーム５ｇ，５ｈ上に水素タンク１を載置する。そして、水素タンク１の上から図示しない金属製のベルトを被せ、このベルトの両端を支持フレーム５ｇ，５ｈの上端のベルト固定部５ｉ，５ｊにボルトなどの締結具を用いて固定することで、水素タンク１をタンクフレーム５に固定する。 The tank frame 5 has support frames 5g and 5h as container frame members formed in a substantially semicircular arc shape extending over the front and rear frames 5a and 5b and the front and rear lower frames 5e and 5f and extending in the vehicle front-rear direction. The hydrogen tank 1 is placed on the support frames 5g and 5h. Then, a metal belt (not shown) is put on the hydrogen tank 1, and both ends of the belt are fixed to the belt fixing portions 5i and 5j at the upper ends of the support frames 5g and 5h by using fasteners such as bolts, The hydrogen tank 1 is fixed to the tank frame 5.

このようにして水素タンク１を収容支持するタンクフレーム５は、前フレーム５ａの長手方向両端から側方上部に延びる側部延長部５ｋを形成し、側部延長部５ｋの先端に、車体への固定部となる車体前固定部５ｍを形成する。 In this way, the tank frame 5 that accommodates and supports the hydrogen tank 1 forms side extension portions 5k that extend from both longitudinal ends of the front frame 5a to the upper side portion, and the end of the side extension portion 5k is connected to the vehicle body. A vehicle body front fixing portion 5m is formed as a fixing portion.

また、タンクフレーム５は、後フレーム５ｂの支持フレーム５ｇ，５ｈと車幅方向同位置から後方上部に延びる容器取付アームとしての後部延長フレーム５ｎ，５ｐを備え、後部延長フレーム５ｎ，５ｐの先端に、車体への固定部となる車体後固定部５ｑを形成する。なお、後部延長フレーム５ｎ，５ｐは、中空のパイプ材で構成している。 The tank frame 5 includes rear extension frames 5n and 5p as container mounting arms extending from the same position in the vehicle width direction to the support frames 5g and 5h of the rear frame 5b to the rear upper part, and at the tips of the rear extension frames 5n and 5p. Then, the rear vehicle body fixing portion 5q which is a fixing portion to the vehicle body is formed. The rear extension frames 5n and 5p are made of a hollow pipe material.

そして、上記した車体前固定部５ｍを、車両下部の左右両側にて車両前後方向に延びる車体骨格部材としてのリヤサイドメンバ７に固定するとともに、車体後固定部５ｑは、車体側における２本のリヤクロスメンバ９，１１（図２，図３参照）相互を連結するクロスメンバ連結部材としてのタンクフレーム取付メンバ１２に連結する。 The vehicle body front fixing portion 5m is fixed to a rear side member 7 as a vehicle body skeleton member extending in the vehicle front-rear direction on both the left and right sides of the lower portion of the vehicle, and the vehicle body rear fixing portion 5q includes two rear parts on the vehicle body side. The cross members 9 and 11 (see FIGS. 2 and 3) are connected to a tank frame mounting member 12 as a cross member connecting member for connecting the members.

上記した２本のリヤクロスメンバ９，１１は、車幅方向に互いに平行な状態で延長してその両端をリヤサイドメンバ７に連結しており、第１，第２クロスメンバをそれぞれ構成している。 The two rear cross members 9 and 11 described above extend in a state parallel to each other in the vehicle width direction, and both ends thereof are connected to the rear side member 7 to constitute first and second cross members, respectively. .

上記構成により、本実施形態では、クロスメンバ連結部材となるタンクフレーム取付メンバ１２と、タンクフレーム５における水素タンク１の下半部を支持して車両前後方向に延びる容器フレーム部材となる支持フレーム５ｇ，５ｈとを、車幅方向同一位置に設定し、タンクフレーム取付メンバ１２に、支持フレーム５ｇ，５ｈと車幅方向同一位置から車両後方に伸びる容器取付アームとなる後部延長フレーム５ｎ，５ｐの車両前後方向後部を連結していることになる。 With the above configuration, in this embodiment, the tank frame mounting member 12 serving as a cross member connecting member and the support frame 5g serving as a container frame member that supports the lower half of the hydrogen tank 1 in the tank frame 5 and extends in the vehicle front-rear direction. , 5h are set at the same position in the vehicle width direction, and the rear extension frames 5n, 5p that serve as container mounting arms extending from the same position in the vehicle width direction as the support frames 5g, 5h to the tank frame mounting member 12 The rear parts in the front-rear direction are connected.

タンクフレーム５の車両後方側で車両の下部には、リヤフレーム１３を取り付けている。このリヤフレーム１３は、図５に斜視図として示すように、車幅方向に延びる前パイプ１３ａおよび後パイプ１３ｂと、これら前，後パイプ１３ａ，１３ｂ相互を連結し、かつ車両後方側が上方位置となるよう傾斜しているリヤフレーム部材としての２本の連結パイ
イプ１３ｃ，１３ｄとから主として構成している。 A rear frame 13 is attached to the lower part of the vehicle on the vehicle rear side of the tank frame 5. As shown in the perspective view of FIG. 5, the rear frame 13 connects the front pipe 13a and the rear pipe 13b extending in the vehicle width direction with the front and rear pipes 13a and 13b, and the rear side of the vehicle is at the upper position. It is mainly composed of two connecting pipes 13c and 13d as rear frame members inclined so as to be.

前パイプ１３ａは、車両前方側に位置し、長手方向両端を側方上部でかつやや後方に向けて屈曲する側方延長部１３ｅを有し、側方延長部１３ｅの先端の前固定部１３ｆを、リヤサイドメンバ７に固定する。また、側方延長部１３ｅの先端付近と前パイプ１３ａの車幅方向中央部とは、ほぼＶ字形状の補強用パイプ１３ｇによって連結する。 The front pipe 13a has a side extension 13e that is located on the vehicle front side and bends both longitudinal ends at the side upper part and slightly rearward, and a front fixing part 13f at the tip of the side extension 13e is provided. The rear side member 7 is fixed. Further, the vicinity of the tip of the side extension 13e and the center in the vehicle width direction of the front pipe 13a are connected by a substantially V-shaped reinforcing pipe 13g.

また、連結パイプ１３ｃ，１３ｄは、前パイプ１３ａ近傍位置で下方に向けて若干屈曲する屈曲部１３ｈを有し、この屈曲部１３ｈ相互を補助パイプ１３ｉで連結するとともに、補助パイプ１３ｉ，前パイプ１３ａおよび連結パイプ１３ｃ，１３ｄで囲まれる部分に、プレート１３ｊを設けている。 The connecting pipes 13c and 13d have a bent portion 13h that is slightly bent downward in the vicinity of the front pipe 13a. The bent portions 13h are connected to each other by the auxiliary pipe 13i, and the auxiliary pipe 13i and the front pipe 13a are connected. A plate 13j is provided in a portion surrounded by the connecting pipes 13c and 13d.

後パイプ１３ｂは、車両後方側に位置し、長手方向両端を側方上部に屈曲する側方延長部１３ｋを有し、側方延長部１３ｋの先端の後固定部１３ｍを、リヤサイドメンバ７に固定する。 The rear pipe 13b is located on the vehicle rear side, has a side extension 13k that bends both longitudinal ends to the side upper part, and fixes a rear fixing part 13m at the tip of the side extension 13k to the rear side member 7. To do.

このように構成したリヤフレーム１３は、それを構成する各パイプ部材を、前記したタンクフレーム５の各フレーム部材に比較して細く形成することで、全体的にタンクフレーム５に比較して強度が低く、かつ車両前後方向に延びる連結パイプ１３ｃ，１３ｄの長手方向ほぼ中央付近に、切欠部１３ｎを形成することで、車両が後方から衝撃を受けて、リヤサイドメンバ７が座屈変形したときに、容易に座屈変形可能なようにしている。 The rear frame 13 configured as described above has a strength that is generally higher than that of the tank frame 5 by forming the pipe members constituting the frame thinner than the frame members of the tank frame 5 described above. When the rear side member 7 is buckled and deformed by receiving an impact from the rear by forming a notch 13n in the vicinity of the center in the longitudinal direction of the connection pipes 13c, 13d that is low and extends in the vehicle longitudinal direction, It is designed to be easily buckled and deformed.

そして、上記したタンクフレーム５とリヤフレーム１３とは、図６に示すように、２本の前後フレーム連結部材１５，１７により互いに連結する。すなわち、これら各前後フレーム連結部材１５，１７の前端は、タンクフレーム５における後下部フレーム５ｆの支持フレーム５ｇ，５ｈに対応する位置に連結する一方、同後端は、リヤフレーム１３における前パイプ１３ａの連結パイプ１３ｃ，１３ｄに対応する位置の前方に突出する前部ブラケット１３ｓに連結する。なお、上記した前後フレーム連結部材１５，１７は、タンクフレーム５と同等の高い強度を備えるものとする。 The tank frame 5 and the rear frame 13 are connected to each other by two front and rear frame connecting members 15 and 17 as shown in FIG. That is, the front ends of the front and rear frame connecting members 15 and 17 are connected to positions corresponding to the support frames 5g and 5h of the rear lower frame 5f in the tank frame 5, while the rear ends are connected to the front pipe 13a in the rear frame 13. It connects with the front bracket 13s which protrudes ahead of the position corresponding to these connection pipes 13c and 13d. The front and rear frame connecting members 15 and 17 described above are assumed to have the same high strength as the tank frame 5.

ここで、前パイプ１３ａは、前記した車体のリヤクロスメンバ９に対し、車両前後方向ほぼ同一位置に配置してあり、したがって、前パイプ１３ａに対する前後フレーム連結部材１５，１７後端の固定部も、第１クロスメンバであるリヤクロスメンバ９に対して車体前後方向がほぼ一致した位置にあることになる。 Here, the front pipe 13a is disposed at substantially the same position in the vehicle front-rear direction with respect to the rear cross member 9 of the vehicle body described above. Therefore, the fixing portions of the rear ends of the front and rear frame connecting members 15, 17 with respect to the front pipe 13a are also provided. Thus, the longitudinal direction of the vehicle body substantially coincides with the rear cross member 9 as the first cross member.

また、タンクフレーム５の容器フレーム部材である支持フレーム５ｇ，５ｈに対し、リヤフレーム１３の車両前後方向に延びるリヤフレーム部材である連結パイプ１３ｃ，１３ｄおよび、前後フレーム連結部材１５，１７を、車幅方向同一位置に設定している。すなわち、これら支持フレーム５ｇ，５ｈ，連結パイプ１３ｃ，１３ｄおよび前後フレーム連結部材１５，１７は、車体前後方向に沿って同一の直線上に位置していることになる。 In addition, connecting pipes 13c and 13d, which are rear frame members extending in the vehicle front-rear direction of the rear frame 13, and front and rear frame connecting members 15 and 17 are connected to the support frames 5g and 5h which are container frame members of the tank frame 5. The same position in the width direction is set. That is, the support frames 5g and 5h, the connection pipes 13c and 13d, and the front and rear frame connection members 15 and 17 are positioned on the same straight line along the vehicle body front-rear direction.

そして、上記したリヤフレーム１３の下部には、リヤフレーム１３の下部を覆うようにして、図７に斜視図として示すリヤアンダカバー１９を装着する。リヤアンダカバー１９は、燃料電池車両のフロア下搭載部品への異物の衝突防止および、空力性能・見栄え向上のためのもので、中央２箇所および後方２箇所の全部で４箇所に設けた取付孔１９ａを、リヤフレーム１３の連結パイプ１３ｃ，１３ｄの側部に設けた取付フランジ１３ｒに整合させ、取付フランジ１３ｒ上に設けたナット２１に、取付孔１９ａから挿入する図示しないボルトを締結する。さらに、リヤアンダカバー１９の前方２箇所の取付孔１９ｂに対して下方から図示しないボルトを挿入し、プレート１３ｊ上に設けたナット２２に締結して固定する。 Then, a rear under cover 19 shown as a perspective view in FIG. 7 is attached to the lower portion of the rear frame 13 so as to cover the lower portion of the rear frame 13. Rear undercover 19, foreign matter anticollision to the floor under the mounting part of a fuel cell vehicle and, since the eyes of the aerodynamic performance and appearance improvement, attachment provided at four positions in total of two central places and rear two positions The hole 19a is aligned with the mounting flange 13r provided on the side of the connecting pipes 13c and 13d of the rear frame 13, and a bolt (not shown) inserted from the mounting hole 19a is fastened to the nut 21 provided on the mounting flange 13r. Further, bolts (not shown) are inserted into the mounting holes 19b at the two front positions of the rear under cover 19 from below, and are fastened and fixed to nuts 22 provided on the plate 13j.

なお、リヤアンダカバー１９は、リヤフレーム１３における連結パイプ１３ｃ，１３ｄの前方の屈曲部１３ｈによる屈曲形状に合わせ、取付孔１９ｂよりやや車両後方位置で、車両上部側が突形状となるよう屈曲形成している。 The rear under cover 19 is bent so that the upper part of the vehicle has a projecting shape at a position slightly rearward of the mounting hole 19b in accordance with the bent shape of the bent portion 13h in front of the connecting pipes 13c and 13d in the rear frame 13. ing.

また、リヤアンダカバー１９の前端部は、前後フレーム連結部材１５，１７の車両前後方向中央よりやや後方に位置し、後述する水素タンクアンダカバー２３の後端を下方から重ね合わせ、ねじ孔１９ｃを利用して下方からボルト締結する。一方、リヤアンダカバー１９の後端部および後方側部は、車体側の図示しないリヤバンパの下端を下方から重ね合わせ、リヤバンパ側からボルトを挿入し、リヤアンダカバー１９上に設定したナット１９ｄに固定する。 Further, the front end portion of the rear under cover 19 is positioned slightly rearward of the vehicle front-rear direction center of the front and rear frame connecting members 15 and 17, and a rear end of a hydrogen tank under cover 23 described later is overlapped from below to form a screw hole 19c. Use and tighten bolts from below. On the other hand, the rear end portion and the rear side portion of the rear under cover 19 are fixed to a nut 19d set on the rear under cover 19 by overlapping the lower end of a rear bumper (not shown) on the vehicle body side from below and inserting bolts from the rear bumper side. To do.

また、タンクフレーム５の下部には、タンクフレーム５の下方を覆うようにして、前記図７に斜視図として示す、容器アンダカバーとしての水素タンクアンダカバー２３を装着する。 Further, a hydrogen tank under cover 23 as a container under cover shown in the perspective view of FIG. 7 is attached to the lower portion of the tank frame 5 so as to cover the lower side of the tank frame 5.

水素タンクアンダカバー２３は、リヤアンダカバー１９と同様に、燃料電池車両のフロア下搭載部品への異物の衝突防止および、空力性能・見栄え向上のためのもので、前方３箇所，中央３箇所の全部で６箇所に設けた取付孔２３ａ，２３ｂを、タンクフレーム５の前，後下部フレーム５ｅ，５ｆに形成したねじ孔にそれぞれ整合させてボルト締結する。さらに、水素タンクアンダカバー２３の後方２箇所の取付孔２３ｃを利用して、前後フレーム連結部材１５，１７の下面にボルト締結する。 Hydrogen tank undercover 23, like the rear undercover 19, foreign matter anticollision to the floor under the mounting part of a fuel cell vehicle and also because the eyes of the aerodynamic performance and appearance improvement, the front three, the middle three The attachment holes 23a and 23b provided at the six locations are aligned with the screw holes formed in the front and rear lower frames 5e and 5f of the tank frame 5 and bolted. Further, the bolts are fastened to the lower surfaces of the front and rear frame connecting members 15 and 17 by using the mounting holes 23 c at two positions behind the hydrogen tank undercover 23.

水素タンクアンダカバー２３の後端部は、前述したように、リヤアンダカバー１９の前端部に下方から重ね合わせた状態で、取付孔２３ｄから挿入するボルトをねじ孔１９ｃに締結することでリヤアンダカバー１９に固定する。 As described above, the rear end portion of the hydrogen tank under cover 23 is overlapped with the front end portion of the rear under cover 19 from below, and a bolt to be inserted from the mounting hole 23d is fastened to the screw hole 19c, thereby fastening the rear under portion. Secure to the cover 19.

また、水素タンクアンダカバー２３の前端部には、図示しない他のカバーを連結して、タンクフレーム５の前方の開口を閉塞する。 Further, another cover (not shown) is connected to the front end portion of the hydrogen tank under cover 23 to close the front opening of the tank frame 5.

上記したリヤアンダカバー１９および水素タンクアンダカバー２３を装着していない状態の図１〜図３に示すように、水素タンク１の後方の領域２４には、水素タンク１に付属する周辺部品である水素バルブなどの機能部品２５を、タンクフレーム５の後フレーム５ｂに取り付けた状態で配置する。そして、この機能部品２５は、前記した前後フレーム連結部材１５，１７より車両上下方向上方に位置している。 As shown in FIGS. 1 to 3 in a state where the rear under cover 19 and the hydrogen tank under cover 23 are not mounted, a region 24 behind the hydrogen tank 1 is a peripheral part attached to the hydrogen tank 1. A functional component 25 such as a hydrogen valve is disposed in a state of being attached to the rear frame 5b of the tank frame 5. The functional component 25 is positioned above the front and rear frame connecting members 15 and 17 in the vehicle vertical direction.

また、車幅方向一方の左側部には、車両の駆動源となる図示しない燃料電池から排出される水素を希釈して車両後方に流す排気管２７を、車両前後方向に延長して配置し、排気管２７の途中には排気気流音を消音するサイレンサ２９を設置する。サイレンサ２９より後方の排気管２７は、上方に屈曲部２７ａで屈曲して車体下面に沿って後方に延長し、後部サイレンサ３１を介して後端の排出口２７ｂから排気を排出する。 In addition, an exhaust pipe 27 that dilutes hydrogen discharged from a fuel cell (not shown) that serves as a vehicle drive source and flows to the rear of the vehicle is disposed on the left side of one side in the vehicle width direction, extending in the vehicle front-rear direction, A silencer 29 is installed in the middle of the exhaust pipe 27 to mute the exhaust airflow sound. The exhaust pipe 27 behind the silencer 29 is bent upward at the bent portion 27 a and extends rearward along the lower surface of the vehicle body, and exhausts exhaust from the exhaust port 27 b at the rear end via the rear silencer 31.

この排気管２７も、サイレンサ２９も含めてその全体が、前記した機能部品２５と同様に、前後フレーム連結部材１５，１７より車両上下方向上方に位置している。また、上記したサイレンサ２５の上方位置には、サスペンション３３を設置している。 The exhaust pipe 27 and the silencer 29 as a whole are positioned above the front and rear frame connecting members 15 and 17 in the vertical direction of the vehicle, as with the functional component 25 described above. A suspension 33 is installed above the silencer 25.

上記した燃料電池車両における車体後部構造によれば、車両が後方から衝撃を受けた場合には、リヤフレーム１３は、全体的にタンクフレーム５に比較して強度が低く、かつ車両前後方向に延びる連結パイプ１３ｃ，１３ｄの長手方向ほぼ中央付近に、切欠部１３ｎを形成することで、容易に座屈変形し、リヤサイドメンバ７の座屈変形が可能となって、リヤサイドメンバ７の衝撃吸収機能を確保している。 According to the vehicle body rear structure in the fuel cell vehicle described above, when the vehicle receives an impact from the rear, the rear frame 13 is generally lower in strength than the tank frame 5 and extends in the vehicle front-rear direction. By forming the notch 13n in the vicinity of the center in the longitudinal direction of the connecting pipes 13c and 13d, the rear side member 7 can be easily buckled and deformed, and the shock absorbing function of the rear side member 7 can be achieved. Secured.

上記のようにしてリヤフレーム１３が座屈変形した際には、座屈変形しやすいリヤフレーム１３に比較して、タンクフレーム５と同様に強度の高い前後フレーム連結部材１５，１７が、水素タンク１の車両後方側の領域２４に配置した機能部品２５を保護し、車両前方へ座屈変形して移動するリヤフレーム１３の機能部品２５への干渉を防止することができる。 When the rear frame 13 is buckled and deformed as described above, the strength of the front and rear frame connecting members 15 and 17 is higher than that of the tank frame 5 as compared with the rear frame 13 that is easily buckled and deformed. Thus, it is possible to protect the functional component 25 disposed in the region 24 on the rear side of the vehicle 1 and to prevent the rear frame 13 that moves by buckling and deforming toward the front of the vehicle from interfering with the functional component 25.

この際、図２，図３に示すように、前後フレーム連結部材１５，１７の車両前後方向後端と、車幅方向に延びる第１クロスメンバであるクロスメンバ９との車両前後方向位置をほぼ一致させているので、前後フレーム連結部材１５，１７が、リヤサイドメンバ７のクロスメンバ９後方における座屈変形の妨げとなることを防止でき、リヤサイドメンバ７の衝撃吸収機能を充分確保することができる。 At this time, as shown in FIGS. 2 and 3, the vehicle longitudinal direction position between the rear end in the vehicle longitudinal direction of the front and rear frame connecting members 15 and 17 and the cross member 9 as the first cross member extending in the vehicle width direction is substantially the same. Therefore, the front and rear frame connecting members 15 and 17 can be prevented from hindering buckling deformation behind the cross member 9 of the rear side member 7, and the shock absorbing function of the rear side member 7 can be sufficiently secured. .

また、クロスメンバ９，１１相互を連結するタンクフレーム取付メンバ１２と、タンクフレーム５における支持フレーム５ｇ，５ｈとを、車幅方向同一位置に設定したので、支持フレーム５ｇ，５ｈと車幅方向同位置からタンクフレーム取付メンバ１２に向けて後方に延びる後部延長フレーム５ｎ，５ｐの経路が直線的となり、車体下方からの突き上げによる衝撃入力が入ったときに、タンクフレーム５を構成するフレーム部材の折れ変形を抑制し、フレーム部材の板厚を最低限に抑えることができ、これによりコスト削減および軽量化を達成することができる。 In addition, since the tank frame mounting member 12 that connects the cross members 9 and 11 and the support frames 5g and 5h in the tank frame 5 are set at the same position in the vehicle width direction, the same as the support frames 5g and 5h in the vehicle width direction. When the path of the rear extension frames 5n and 5p extending rearward from the position toward the tank frame mounting member 12 is linear and an impact input is applied by pushing up from below the vehicle body, the frame members constituting the tank frame 5 are folded. Deformation can be suppressed and the plate thickness of the frame member can be minimized, thereby achieving cost reduction and weight reduction.

また、支持フレーム５ｇ，５ｈと車幅方向同一位置から車両後方に伸びる後部延長フレーム５ｎ，５ｐの車両前後方向後部を、車両が後方から衝撃を受けた際に座屈変形を受けにくいタンクフレーム取付メンバ１２に連結しているので、タンクフレーム５の変形を防止することができる。 In addition, a tank frame is attached to the rear portions of the rear extension frames 5n and 5p extending rearward from the same position in the vehicle width direction as the support frames 5g and 5h when the vehicle receives an impact from the rear. Since it is connected to the member 12, the deformation of the tank frame 5 can be prevented.

さらに、タンクフレーム５の支持フレーム５ｇ，５ｈに対し、リヤフレーム１３の連結パイプ１３ｃ，１３ｄおよび前後フレーム連結部材１５，１７を、車幅方向同一位置に設定したので、これら各部材が車両前後方向に沿って同一直線上に位置することになり、車両が後方から衝撃を受けた際のタンクフレーム５および前後フレーム連結部材１５，１７の折れ変形を抑え、座屈変形するリヤフレーム１３が水素タンク１周辺に干渉するのを防止することができる。 Further, since the connecting pipes 13c and 13d of the rear frame 13 and the front and rear frame connecting members 15 and 17 are set at the same position in the vehicle width direction with respect to the support frames 5g and 5h of the tank frame 5, these members are arranged in the vehicle front and rear direction. The rear frame 13 which is located on the same straight line and suppresses the bending deformation of the tank frame 5 and the front and rear frame connecting members 15 and 17 when the vehicle receives an impact from the rear and which buckles and deforms is a hydrogen tank. It is possible to prevent interference with one periphery.

また、前後フレーム連結部材１５，１７を、水素タンク１の機能部品２５より、車両上下方向下方に配置したので、車輪が路上の溝に入り込むなどして車体下面が路面に干渉する際に、前後フレーム連結部材１５，１７が先に干渉して、機能部品２５を保護することができる。 In addition, since the front and rear frame connecting members 15 and 17 are arranged below the functional part 25 of the hydrogen tank 1 in the vehicle vertical direction, the front and rear frames are interfered with when the lower surface of the vehicle body interferes with the road surface due to the wheels entering the grooves on the road. The frame connecting members 15 and 17 can interfere with each other first to protect the functional component 25.

また、前後フレーム連結部材１５，１７を、排気管２７より車両上下方向下方に配置したので、上記と同様にして車体下面が路面に干渉する際に、前後フレーム連結部材１５，１７が先に干渉し、排気管２７の特にサイレンサ２９が路面から突き上げられてサスペンション２９のリンク類に干渉することを防ぐことができ、走行不能となることを防止することができる。 Further, since the front and rear frame connecting members 15 and 17 are arranged below the exhaust pipe 27 in the vehicle vertical direction, when the lower surface of the vehicle body interferes with the road surface in the same manner as described above, the front and rear frame connecting members 15 and 17 interfere first. In addition, it is possible to prevent the silencer 29 of the exhaust pipe 27, in particular, from being pushed up from the road surface and interfere with the links of the suspension 29, and it is possible to prevent the vehicle from becoming unable to run.

また、タンクフレーム５の下面に取り付けた水素タンクアンダカバー２３の後部を、タンクフレーム５と同様に強度の高い前後フレーム連結部材１５，１７に取り付けたので、冠水路走行時に問題となる水素タンクアンダカバー２３の破損，変形を防止することができる。 Further, since the rear part of the hydrogen tank under cover 23 attached to the lower surface of the tank frame 5 is attached to the front and rear frame connecting members 15 and 17 having the same strength as the tank frame 5, the hydrogen tank under cover is problematic when traveling on the submerged channel. Breakage and deformation of the cover 23 can be prevented.

本発明の一実施形態に係わる車体後部構造の側面図である。It is a side view of the vehicle body rear part structure concerning one Embodiment of this invention. 図１の車体後部構造を車体下方から見た斜視図である。It is the perspective view which looked at the vehicle body rear part structure of FIG. 1 from the vehicle body downward direction. 図１の底面図である。It is a bottom view of FIG. 図１の車体後部構造に使用するタンクフレームの斜視図である。It is a perspective view of the tank frame used for the vehicle body rear part structure of FIG. 図１の車体後部構造に使用するリヤフレームの斜視図である。It is a perspective view of the rear frame used for the vehicle body rear part structure of FIG. タンクフレームとリヤフレームとを前後フレーム連結部材により互いに連結した状態を示す斜視図である。It is a perspective view which shows the state which mutually connected the tank frame and the rear frame with the front-and-rear frame connection member. 互いに連結した状態のタンクフレームおよびリヤフレームと、水素タンクアンダカバーおよびリヤアンダカバーとの分解斜視図である。FIG. 4 is an exploded perspective view of a tank frame and a rear frame, and a hydrogen tank under cover and a rear under cover in a state of being connected to each other.

Explanation of symbols

１水素タンク（燃料容器）
５タンクフレーム（容器フレーム）
５ｇ，５ｈタンクフレームの支持フレーム（容器フレーム部材）
５ｎ，５ｐ後部延長フレーム（容器取付アーム）
９クロスメンバ（第１クロスメンバ）
１１クロスメンバ（第２クロスメンバ）
１２タンクフレーム取付メンバ（クロスメンバ連結部材）
１３リヤフレーム
１３ｃ，１３ｄリヤフレームの連結パイプ（リヤフレーム部材）
１５，１７前後フレーム連結部材
２３水素タンクアンダカバー（容器アンダカバー）
２５水素タンクの機能部品（燃料容器に付属する周辺部品）
２７排気管 1 Hydrogen tank (fuel container)
5 Tank frame (container frame)
5g, 5h Tank frame support frame (container frame member)
5n, 5p Rear extension frame (container mounting arm)
9 Cross member (first cross member)
11 Cross member (second cross member)
12 Tank frame mounting member (cross member connecting member)
13 Rear frame 13c, 13d Rear frame connecting pipe (rear frame member)
15, 17 Front and rear frame connecting members 23 Hydrogen tank under cover (container under cover)
25 Functional parts of hydrogen tank (peripheral parts attached to fuel container)
27 Exhaust pipe

Claims

A rear frame having a container frame for supporting a hydrogen tank attached to the lower surface of the vehicle, and a pipe member having a strength lower than that of the container frame and extending in the vehicle front-rear direction on the lower surface of the vehicle behind the container frame mounting, and the rear frame and the container frame, connected by front and rear frame connecting member comprising the same intensity and the container frame, the rear of the hydrogen tank is arranged functional components is a peripheral component that is included with the hydrogen tank A vehicle body rear structure characterized by that.

The vehicle body rear part structure according to claim 1, wherein a vehicle front-rear direction position of a rear end of the front-rear frame connecting member in the vehicle front-rear direction and a first cross member on the vehicle body side extending in the vehicle width direction are matched.

The first cross member and a second cross member extending in the vehicle width direction positioned in front of the vehicle are connected by a cross member connecting member, and the cross member connecting member and a lower portion of the hydrogen tank in the container frame are supported. The container frame member extending in the vehicle longitudinal direction is set at the same position in the vehicle width direction, and the container in the container frame extends from the same position in the vehicle width direction as the container frame member to the cross member connecting member. The vehicle body rear part structure according to claim 1 or 2, wherein the rear part of the mounting arm in the vehicle front-rear direction is connected.

The rear frame member extending in the vehicle body front-rear direction of the rear frame and the front-rear frame connecting member are set at the same position in the vehicle width direction with respect to the container frame member extending in the vehicle front-rear direction of the container frame. Item 4. The vehicle body rear structure according to Item 3.

The vehicle body rear part structure according to any one of claims 1 to 4, wherein the front and rear frame connecting members are arranged below a peripheral part attached to the hydrogen tank in a vehicle vertical direction.

The vehicle body rear part structure according to any one of claims 1 to 5, wherein the front and rear frame connecting members are arranged below a vehicle vertical direction from an exhaust pipe through which exhaust exhausted from a drive source of the vehicle flows. .

The vehicle body according to any one of claims 1 to 6, wherein a container under cover is attached to a lower surface of the container frame, and a rear part of the container under cover in the vehicle front-rear direction is attached to the front / rear frame connecting member. Rear structure.

A rear frame having a container frame for supporting a hydrogen tank attached to the lower surface of the vehicle, and a pipe member having a strength lower than that of the container frame and extending in the vehicle front-rear direction on the lower surface of the vehicle behind the container frame mounting, and the rear frame and the container frame, connected by front and rear frame connecting member comprising the same intensity and the container frame, the rear of the hydrogen tank is disposed a functional part is a peripheral part that comes into the hydrogen tank The vehicle body rear structure is characterized in that the rear frame buckles and deforms so that a vehicle body skeleton member extending in the vehicle longitudinal direction can buckle and deform when the vehicle receives an impact from the rear.