JP2005271878A - Vehicle body lower part structure - Google Patents

Vehicle body lower part structure Download PDF

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JP2005271878A
JP2005271878A JP2004092350A JP2004092350A JP2005271878A JP 2005271878 A JP2005271878 A JP 2005271878A JP 2004092350 A JP2004092350 A JP 2004092350A JP 2004092350 A JP2004092350 A JP 2004092350A JP 2005271878 A JP2005271878 A JP 2005271878A
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vehicle
guard bar
heavy
suspension
floor
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JP4479299B2 (en
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Shinichiro Mizote
信一朗 溝手
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Nissan Motor Co Ltd
日産自動車株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body lower part structure capable of maintaining torsional rigidity of the vehicle body to a high degree and surely protecting a wire harness from damage even in a vehicle mounted with a weight article under a floor. <P>SOLUTION: A guard bar 17 is extended under the floor of a border part of a motor room 1 arranged at a front part of the vehicle and arranged with a driving means for traveling the vehicle and an occupant room 3 arranged at a rear part of the motor room 1 and mounted with a mounting frame 15 and a fuel battery stack 21 under the floor along a vehicle width direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、自動車等の車両における車体下部構造に関し、さらに詳しくは、燃料電池車両におけるフロア下の構造に関する。   The present invention relates to a lower body structure in a vehicle such as an automobile, and more particularly to a structure under a floor in a fuel cell vehicle.
従来、燃料電池車や電気自動車等の車両の床下には、車両前後方向に延びるサイドメンバ及びこのサイドメンバ同士を左右に連結する複数のクロスメンバが設けられ、また、重量が大きい駆動モータや強電ユニット及び燃料電池スタック等がモータルーム又は座席下方の床下に配設されている(例えば、特許文献1,2参照)。
特開2003−123779公報 特開2003−17107公報
Conventionally, under the floor of a vehicle such as a fuel cell vehicle or an electric vehicle, a side member extending in the vehicle front-rear direction and a plurality of cross members for connecting the side members to the left and right are provided. A unit, a fuel cell stack, and the like are disposed under the floor under the motor room or the seat (for example, see Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 2003-123779 JP 2003-17107 A
しかしながら、前記従来例では、駆動モータなどの重量物が配設されるモータルームと乗員室との境界部分には、車両走行時にねじれ変形が生じやすいという問題があった。  However, the conventional example has a problem in that twisting deformation is likely to occur at the boundary between the motor room and the passenger compartment where a heavy object such as a drive motor is disposed, during traveling of the vehicle.
そこで、本発明は、床下に重量物を搭載した車両においても、車体のねじれ剛性を高く維持することができる車体下部構造を提供することを目的としている。   Accordingly, an object of the present invention is to provide a vehicle body lower structure that can maintain a high torsional rigidity of a vehicle body even in a vehicle in which a heavy object is mounted under the floor.
前記目的を達成するために、本発明に係る車体下部構造は、車両前部に配置され、車両を走行させる駆動手段を配設した駆動室と、該駆動室の後部に配置されて床下に重量物を搭載した乗員室との境界部の床下に、車幅方向に沿ってガードバーを延設したことを特徴としている。  In order to achieve the above object, the vehicle body lower part structure according to the present invention is disposed in the front part of the vehicle and has a driving chamber in which driving means for running the vehicle is disposed, and a rear part of the driving chamber and is weighted under the floor. It is characterized in that a guard bar is extended along the vehicle width direction under the floor at the boundary with the passenger compartment on which objects are mounted.
本発明に係る車体下部構造によれば、駆動室と乗員室との境界部にガードバーを車幅方向に沿って配置しているため、車両走行時における車体のねじれ剛性を向上させることができる。即ち、駆動室には、駆動モータや強電ユニットなどの重量物である駆動手段が配設されており、乗員室の床下には、例えば燃料電池ユニット等の重量物が搭載されているため、これらの駆動室及び乗員室の境界部分は、駆動室や乗員室よりは、やや剛性が低くなる。従って、この駆動室及び乗員室の境界部にガードバーを配設すれば、車両のねじれ剛性を高めることができる。なお、本発明によれば、ガソリン車両等の一般車の車体構造を用いて燃料電池車両にすることができ、コストダウンを図ることができる。  According to the vehicle body lower structure according to the present invention, since the guard bar is arranged along the vehicle width direction at the boundary between the drive chamber and the passenger compartment, the torsional rigidity of the vehicle body during vehicle travel can be improved. That is, driving means that are heavy items such as a drive motor and a high-power unit are arranged in the driving chamber, and heavy items such as a fuel cell unit are mounted under the floor of the passenger compartment. The boundary between the driving chamber and the passenger compartment is slightly less rigid than the driving chamber and the passenger compartment. Therefore, if a guard bar is provided at the boundary between the driving chamber and the passenger compartment, the torsional rigidity of the vehicle can be increased. In addition, according to this invention, it can be set as a fuel cell vehicle using the vehicle body structure of general vehicles, such as a gasoline vehicle, and can aim at cost reduction.
以下、本発明の実施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は本発明の実施形態による車体下部構造を採用した車両前部を下方から見上げた底面図である。  FIG. 1 is a bottom view of a front portion of a vehicle that employs a vehicle body lower structure according to an embodiment of the present invention as viewed from below.
概略的には、車両前方側(図1の左側)には、駆動室であるモータルーム1が設けられており、該モータルーム1の車両後方側(図1の右側)には、乗員室(キャビン)3が設けられている。  Schematically, a motor room 1 which is a driving chamber is provided on the front side of the vehicle (left side in FIG. 1), and a passenger compartment (on the right side in FIG. 1) of the motor room 1 is provided on the vehicle rear side. (Cabin) 3 is provided.
前記モータルーム1の左右両側には、回動自在に支持されたフロントタイヤ5が配設され、これらのフロントタイヤ5の車幅方向内側には、車両前後方向に沿って延びるサイドメンバ7が左右一対に設けられている。このサイドメンバ7は、モータルーム1の前端から乗員室3に至るまで延設されており、乗員室3の前端部において、車幅方向外側にアウトリガー部7aが分岐して形成されている。  Front tires 5 that are rotatably supported are disposed on the left and right sides of the motor room 1, and side members 7 that extend along the vehicle front-rear direction are disposed on the inner sides of the front tires 5 in the vehicle width direction. It is provided in a pair. The side member 7 extends from the front end of the motor room 1 to the passenger compartment 3, and an outrigger portion 7 a is formed at the front end portion of the passenger compartment 3 so as to branch outward in the vehicle width direction.
また、モータルーム1内の左右のサイドメンバ7間には、電力消費装置である強電ユニット9とサスペンションメンバ11が配設され、前記強電ユニット9が車両前方側に配置され、該強電ユニット9の後方にサスペンションメンバ11が配置されている。なお、モータルーム1内には、車両を駆動走行させる駆動手段を構成する図外の駆動モータ及び強電ユニット9が配設されている。  Further, between the left and right side members 7 in the motor room 1, a high-power unit 9 and a suspension member 11 which are power consuming devices are disposed, and the high-power unit 9 is disposed on the front side of the vehicle. A suspension member 11 is disposed rearward. In the motor room 1, a drive motor and a high-power unit 9 (not shown) constituting drive means for driving the vehicle are disposed.
一方、乗員室3側においては、重量物である燃料電池スタック(電力発生装置)を車体に搭載する搭載フレーム15が配設されている。該搭載フレーム15の前端部15aの中央側は車幅方向に沿って略直線状に形成されている。  On the other hand, on the passenger compartment 3 side, a mounting frame 15 for mounting a heavy fuel cell stack (power generation device) on the vehicle body is disposed. The center side of the front end portion 15a of the mounting frame 15 is formed in a substantially linear shape along the vehicle width direction.
また、乗員室3とモータルーム1との境界部、具体的には、乗員室3の床下の前端に車幅方向に沿ってガードバー17が延設されている。  A guard bar 17 extends along the vehicle width direction at the boundary between the passenger compartment 3 and the motor room 1, specifically, at the front end of the passenger compartment 3 below the floor.
このガードバー17は、図1のA−A線による断面図である図2に示すように、車両前後方向から見たときに、車幅方向中央側が略水平状に延設され、左右両側が斜め上方に屈曲して延びており、この両端部17a,17aが、取付ブラケットであるガセット19を介してサイドメンバ7にボルト締結されている。このガードバー17によって、左右のサイドメンバ7同士を橋渡している。  As shown in FIG. 2, which is a cross-sectional view taken along the line AA of FIG. 1, the guard bar 17 extends substantially horizontally at the center in the vehicle width direction when viewed from the vehicle front-rear direction, and the left and right sides are oblique. The two ends 17a and 17a are bent and extended upward, and are bolted to the side member 7 via a gusset 19 which is a mounting bracket. The guard bar 17 bridges the left and right side members 7.
図3は本発明の実施形態によるガードバー17近傍部を車両側方から見た側面図である。   FIG. 3 is a side view of the vicinity of the guard bar 17 as viewed from the side of the vehicle according to the embodiment of the present invention.
乗員室3側の床下に配設された搭載フレーム15の上には、燃料電池スタック21が搭載されており、ガードバー17からは車両後方に向けて略水平状に取付部23が延設されている。この取付部23は、後端23aが上下方向に薄く形成され、この後端23aが搭載フレーム15の下部にボルト締結されている。また、ガードバー17の下部の地上高Hgは、搭載フレーム15の地上高Hfと同一高さに設定されている。なお、ガードバー17の地上高Hgを搭載フレーム15の地上高Hfよりも高く設定しても良い。また、図1〜3に示すように、ワイヤハーネス25は、燃料電池スタック21からガードバー17及びサスペンションメンバ11の上方を通して強電ユニット9に接続されている。   A fuel cell stack 21 is mounted on a mounting frame 15 disposed under the floor on the passenger compartment 3 side, and a mounting portion 23 extends substantially horizontally from the guard bar 17 toward the rear of the vehicle. Yes. The mounting portion 23 has a rear end 23 a that is thin in the vertical direction, and the rear end 23 a is bolted to the lower portion of the mounting frame 15. The ground height Hg below the guard bar 17 is set to the same height as the ground height Hf of the mounting frame 15. The ground height Hg of the guard bar 17 may be set higher than the ground height Hf of the mounting frame 15. 1 to 3, the wire harness 25 is connected to the high voltage unit 9 from the fuel cell stack 21 through the guard bar 17 and the suspension member 11.
図4は図1のガードバーの左端部近傍を示す拡大図である。  FIG. 4 is an enlarged view showing the vicinity of the left end portion of the guard bar of FIG.
この図4に示すように、外形が略三角形に形成されたガセット19は3箇所の取付点P,Q,Rが設けられている。これらの取付点のうち、取付点Pは、ガセット19の最も車幅方向外側に配置され、ガードバー17の両端部は取付点Pと共にサイドメンバ7にボルト締結されている。また、車幅方向中央側の取付点Qは、サイドメンバ7にボルト締結され、取付点Rは、サスペンションメンバ11の後端部にボルト締結されている。  As shown in FIG. 4, the gusset 19 whose outer shape is formed in a substantially triangular shape is provided with three attachment points P, Q, and R. Of these attachment points, the attachment point P is disposed on the outermost side in the vehicle width direction of the gusset 19, and both end portions of the guard bar 17 are bolted to the side member 7 together with the attachment point P. Further, the attachment point Q on the center side in the vehicle width direction is bolted to the side member 7, and the attachment point R is bolted to the rear end portion of the suspension member 11.
また、図5は図1のガードバー全体の周辺部の拡大図である。  FIG. 5 is an enlarged view of the periphery of the entire guard bar of FIG.
ガードバー17の後部面からは車幅方向に所定の間隔を隔てて3本の取付部23が車両後方に向けて延設されている。これらの取付部23は、3本共にガードバー17に対して直交するように配置され、中央側の取付部23は、搭載フレーム15の前端部15aに対しても直交するように配置されている。  From the rear surface of the guard bar 17, three attachment portions 23 are extended toward the rear of the vehicle at a predetermined interval in the vehicle width direction. These three attachment portions 23 are all arranged so as to be orthogonal to the guard bar 17, and the attachment portion 23 on the center side is also arranged so as to be orthogonal to the front end portion 15 a of the mounting frame 15.
以下、車両衝突時における衝突荷重の伝達要領を簡単に説明する。  Hereinafter, a procedure for transmitting a collision load at the time of a vehicle collision will be briefly described.
まず、図1に示すように、サスペンションメンバ11に衝突荷重が入力されると、該サスペンションメンバ11の後端部からガセット19を介してガードバー17の両端部17aに伝達される。しかし、ガードバー17は取付部23を介して搭載フレーム15に接続され、搭載フレーム15には燃料電池スタック21が設けられているため、このガードバー17によって、サスペンションメンバ11等の後方移動を効率的に抑制することができる。  First, as shown in FIG. 1, when a collision load is input to the suspension member 11, it is transmitted from the rear end portion of the suspension member 11 to both end portions 17 a of the guard bar 17 through the gusset 19. However, since the guard bar 17 is connected to the mounting frame 15 via the mounting portion 23 and the mounting frame 15 is provided with the fuel cell stack 21, the guard bar 17 efficiently moves the suspension member 11 and the like backward. Can be suppressed.
本発明の実施形態によれば、以下の作用効果を有する。  According to the embodiment of the present invention, the following effects are obtained.
まず、車両の左右両側に車両前後方向に沿って、前記モータルーム1から乗員室3にかけて左右一対のサイドメンバ7を延設し、前記ガードバー17の両端部をこれら左右のサイドメンバ7,7に取り付けることによって、ガードバー17でサイドメンバ7,7同士を橋渡しているため、車体のねじれ剛性を効率的に向上させることができる。また、ガードバー17の両端部17a,17aは、剛性の高いサイドメンバ7に固定されているため、特に車体のローリング方向のねじれ剛性を高めることができる。なお、前記実施形態においては、ガードバー17の両端部17aをガセット19を介してサイドメンバ7に固定したが、本発明はこれに限定されず、ガードバー17の両端部17aを直接サイドメンバ7に固定しても良い。  First, a pair of left and right side members 7 are extended from the motor room 1 to the passenger compartment 3 along the vehicle front-rear direction on both left and right sides of the vehicle, and both ends of the guard bar 17 are connected to the left and right side members 7, 7. By attaching, the side members 7 and 7 are bridged by the guard bar 17, so that the torsional rigidity of the vehicle body can be improved efficiently. Further, since both end portions 17a and 17a of the guard bar 17 are fixed to the highly rigid side member 7, the torsional rigidity in the rolling direction of the vehicle body can be particularly enhanced. In the above embodiment, both end portions 17a of the guard bar 17 are fixed to the side member 7 via the gusset 19. However, the present invention is not limited to this, and both end portions 17a of the guard bar 17 are directly fixed to the side member 7. You may do it.
さらに、モータルーム1には、重量物である図外の駆動モータや強電ユニット9及びサスペンションメンバ11が配設されているため、モータルーム1自体が剛性の高い空間となっている。一方、乗員室3の床下にも重量物である燃料電池スタック21が搭載されているため、乗員室側も剛性が高く設定されている。これらの高剛性のモータルーム1及び乗員室3の境界部は、剛性、特にねじれ剛性が低くなりやすいが、本実施形態によれば、この境界部にガードバー17を配設しているため、燃料電池車両等においても車両全体のねじれ剛性を向上させることができる。   Further, since the motor room 1 includes a heavy drive motor (not shown), a high-power unit 9 and a suspension member 11, the motor room 1 itself is a highly rigid space. On the other hand, since the heavy fuel cell stack 21 is mounted under the floor of the passenger compartment 3, the passenger compartment side is also set to have high rigidity. The boundary portion between the high-rigidity motor room 1 and the passenger compartment 3 tends to be low in rigidity, particularly torsional rigidity. However, according to the present embodiment, the guard bar 17 is disposed at this boundary portion, so that the fuel Even in a battery vehicle or the like, the torsional rigidity of the entire vehicle can be improved.
さらに、前記重量物は、電力発生装置である燃料電池スタック21及び搭載フレーム15であり、前記モータルーム1に、この燃料電池スタック21とワイヤハーネス25を介して接続された強電ユニット9を配置し、前記ワイヤハーネス25をガードバー17の上方を配策させているため、車両走行中において、路面上の障害物からワイヤハーネス25を確実に保護することができる。  Further, the heavy objects are a fuel cell stack 21 and a mounting frame 15 which are power generation devices. In the motor room 1, a high-power unit 9 connected to the fuel cell stack 21 via a wire harness 25 is arranged. Since the wire harness 25 is arranged above the guard bar 17, the wire harness 25 can be reliably protected from obstacles on the road surface while the vehicle is traveling.
そして、前記ガードバー17を燃料電池スタック21を搭載している搭載フレーム15に固定しているため、ガードバー17の取付強度が更に大きくなり、ワイヤハーネス25を更に確実に保護することができる。   Since the guard bar 17 is fixed to the mounting frame 15 on which the fuel cell stack 21 is mounted, the mounting strength of the guard bar 17 is further increased, and the wire harness 25 can be more reliably protected.
また、前記ガードバー17の前方にサスペンションメンバ11を設け、前記搭載フレーム15の前端部15aを車幅方向に沿って形成し、ガードバー17から車両後方に向けて取付部23を延設し、この取付部23を前端部15aに固定することによって、車両上下方向から見たときに、取付部23を搭載フレーム15の前端部15aに対して直交させて配置しているため、車両前方からサスペンションメンバ11に衝突荷重が入力された場合に、ガードバー17が燃料電池スタック21及び搭載フレーム15によって確実に衝突荷重を受け止め、サスペンションメンバ11の後方移動を最小限に抑制することができる。よって、車両衝突時に、モータルーム1内の各部品類が乗員室3内に侵入することを好適に防止することができる。   Further, the suspension member 11 is provided in front of the guard bar 17, the front end portion 15a of the mounting frame 15 is formed along the vehicle width direction, and an attachment portion 23 is extended from the guard bar 17 toward the rear of the vehicle. By fixing the portion 23 to the front end portion 15a, the mounting member 23 is disposed perpendicular to the front end portion 15a of the mounting frame 15 when viewed from the vehicle vertical direction, so that the suspension member 11 can be viewed from the front of the vehicle. When a collision load is input to the guard bar 17, the guard bar 17 can reliably receive the collision load by the fuel cell stack 21 and the mounting frame 15, and the rearward movement of the suspension member 11 can be suppressed to a minimum. Therefore, it is possible to suitably prevent each component in the motor room 1 from entering the passenger compartment 3 at the time of a vehicle collision.
さらに、前記サスペンションメンバ11の後端部とガードバー17の両端部17aとをガセット19を介して連結しているため、車両衝突によってサスペンションメンバ11に入力された衝突荷重は、ガセット19を介してガードバー17に伝達され、前記サスペンションメンバ11の後方移動量を更に抑えることができる。また、サスペンションメンバ11がガードバー17に直接取り付けられていないため、車両走行時にサスペンションメンバ11が上下左右に揺動したときでも、この揺動が直接にガイドバーに伝達されないため、車体のねじれを効率的に防止することができる。さらに、通常の車両には、ガセット19が配設されているため、既存の車体構造を変えることなく、部品点数の増加を最小限に抑えることができる。  Further, since the rear end portion of the suspension member 11 and both end portions 17a of the guard bar 17 are connected via the gusset 19, the collision load input to the suspension member 11 due to the vehicle collision is prevented via the gusset 19. 17, the amount of rearward movement of the suspension member 11 can be further suppressed. Further, since the suspension member 11 is not directly attached to the guard bar 17, even when the suspension member 11 swings up, down, left and right when the vehicle travels, the swing is not directly transmitted to the guide bar, so that the torsion of the vehicle body is efficiently performed. Can be prevented. Further, since the gusset 19 is provided in a normal vehicle, the increase in the number of parts can be minimized without changing the existing vehicle body structure.
そして、前記ガードバー17の取付部23を、車両側方から見たときに、車両後方に向けて略水平状に配置しているため、ガードバー17に入力された衝突荷重をそのまま方向を変えることなく搭載フレーム15に直接伝達させることができ、前記サスペンションメンバ11の後方移動量を更に抑えることができる。  And since the attachment part 23 of the said guard bar 17 is arrange | positioned substantially horizontal toward the vehicle rear, when it sees from the vehicle side, without changing the direction of the collision load input into the guard bar 17 as it is. This can be transmitted directly to the mounting frame 15, and the amount of rearward movement of the suspension member 11 can be further suppressed.
また、前記ガードバー17の下部を、搭載フレーム15の下面以上の高さに配置しているため、車両走行時における空気抵抗を低くすることができる。  Further, since the lower portion of the guard bar 17 is disposed at a height higher than the lower surface of the mounting frame 15, air resistance during vehicle travel can be reduced.
本発明の実施形態による車体下部構造を採用した車両の底面図である。1 is a bottom view of a vehicle that employs a lower body structure according to an embodiment of the present invention. 図1のA−A線による断面図である。It is sectional drawing by the AA line of FIG. 本発明の実施形態によるガードバー近傍部を車両側方から見た側面図である。It is the side view which looked at the guard bar vicinity part by embodiment of this invention from the vehicle side. 図1のガードバーの左端部近傍を示す拡大図である。It is an enlarged view which shows the left end part vicinity of the guard bar of FIG. 図1のガードバー全体の周辺部の拡大図である。It is an enlarged view of the peripheral part of the whole guard bar of FIG.
符号の説明Explanation of symbols
1…モータルーム(駆動室)
3…乗員室(キャビン)
7…サイドメンバ
9…強電ユニット(電力消費装置)
11…サスペンションメンバ
15…搭載フレーム(重量物)
15a…前端部
17…ガードバー
17a…両端部
19…ガセット(取付ブラケット)
21…燃料電池スタック(電力発生装置、重量物)
23…取付部
25…ワイヤハーネス
1 ... Motor room (drive room)
3 ... Crew compartment (cabin)
7 ... Side member 9 ... High power unit (power consumption device)
11 ... Suspension member 15 ... Mounting frame (heavy)
15a ... front end 17 ... guard bar 17a ... both ends 19 ... gusset (mounting bracket)
21 ... Fuel cell stack (power generator, heavy object)
23 ... Mounting part 25 ... Wire harness

Claims (9)

  1. 車両前部に配置され、車両を走行させる駆動手段を配設した駆動室と、該駆動室の後部に配置されて床下に重量物を搭載した乗員室との境界部の床下に、車幅方向に沿ってガードバーを延設したことを特徴とする車体下部構造。  In the vehicle width direction below the floor at the boundary between the driving chamber disposed at the front of the vehicle and provided with driving means for driving the vehicle and the passenger compartment disposed at the rear of the driving chamber and loaded with heavy objects under the floor A vehicle body lower structure characterized by extending a guard bar along the side.
  2. 車両の左右両側に車両前後方向に沿って、前記駆動室から乗員室にかけて左右一対のサイドメンバを延設し、前記ガードバーの両端部をこれら左右のサイドメンバに取り付けることによって、ガードバーでサイドメンバ同士を橋渡したことを特徴とする請求項1に記載の車体下部構造。  A pair of left and right side members are extended from the driving chamber to the passenger compartment along the vehicle front-rear direction on both the left and right sides of the vehicle, and both end portions of the guard bar are attached to the left and right side members. The vehicle body lower part structure according to claim 1, wherein the vehicle body is bridged.
  3. 前記重量物は、電力発生装置であり、前記駆動室に、この電力発生装置とワイヤハーネスを介して接続された電力消費装置を配置し、
    前記ワイヤハーネスをガードバーの上方を通して配策したことを特徴とする請求項1又は2に記載の車体下部構造。
    The heavy object is a power generator, and a power consuming device connected to the power chamber via a wire harness is disposed in the driving chamber,
    The vehicle body lower part structure according to claim 1, wherein the wire harness is routed through above the guard bar.
  4. 前記電力発生装置は、燃料電池スタックであり、前記電力消費装置は、強電ユニットであることを特徴とする請求項3に記載の車体下部構造。  The vehicle body lower part structure according to claim 3, wherein the power generation device is a fuel cell stack, and the power consumption device is a high power unit.
  5. 前記ガードバーを前記重量物に固定したことを特徴とする請求項1〜4のいずれか1項に記載の車体下部構造。  The vehicle body lower structure according to any one of claims 1 to 4, wherein the guard bar is fixed to the heavy object.
  6. 前記ガードバーの前方にサスペンションメンバを設け、前記重量物の前端部を車幅方向に沿って形成し、
    ガードバーから車両後方に向けて取付部を延設し、この取付部を前記重量物の前端部に固定することによって、車両上下方向から見たときに、取付部を、ガードバー及び重量物の前端部の双方に対して直交させたことを特徴とする請求項1〜5のいずれか1項に記載の車体下部構造。
    A suspension member is provided in front of the guard bar, and a front end portion of the heavy object is formed along the vehicle width direction.
    A mounting portion is extended from the guard bar toward the rear of the vehicle, and the mounting portion is fixed to the front end portion of the heavy object. The vehicle body lower part structure according to any one of claims 1 to 5, wherein the vehicle body lower part structure is orthogonal to both.
  7. 前記サスペンションメンバの後端部とガードバーの両端部とを、前記サスペンションメンバと車体を固定している取付ブラケットを介して連結したことを特徴とする請求項6に記載の車体下部構造。  The vehicle body lower part structure according to claim 6, wherein a rear end portion of the suspension member and both end portions of the guard bar are connected via a mounting bracket that fixes the suspension member and the vehicle body.
  8. 前記ガードバーの取付部を、車両側方から見たときに、車両後方に向けて略水平状に配置したことを特徴とする請求項6又は7に記載の車体下部構造。  The vehicle body lower part structure according to claim 6 or 7, wherein the mounting portion of the guard bar is arranged substantially horizontally toward the rear of the vehicle when viewed from the side of the vehicle.
  9. 前記ガードバーの下部を、重量物の下面以上の高さに配置したことを特徴とする請求項1〜8のいずれか1項に記載の車体下部構造。

    The vehicle body lower part structure according to any one of claims 1 to 8, wherein a lower part of the guard bar is arranged at a height equal to or higher than a lower surface of a heavy object.

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