JP2023010970A - Vehicle lower part structure - Google Patents

Vehicle lower part structure Download PDF

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JP2023010970A
JP2023010970A JP2022187399A JP2022187399A JP2023010970A JP 2023010970 A JP2023010970 A JP 2023010970A JP 2022187399 A JP2022187399 A JP 2022187399A JP 2022187399 A JP2022187399 A JP 2022187399A JP 2023010970 A JP2023010970 A JP 2023010970A
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vehicle
cross member
joined
width direction
floor
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JP7373138B2 (en
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桂介 河合
Keisuke Kawai
晋栄 望月
Kunishige Mochizuki
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Suzuki Motor Corp
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Suzuki Motor Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D25/00Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08Front or rear portions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D25/00Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20Floors or bottom sub-units
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00Arrangement or mounting of electrical propulsion units
    • B60K1/04Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00Arrangement or mounting of electrical propulsion units
    • B60K1/04Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438Arrangement under the floor

Abstract

PROBLEM TO BE SOLVED: To facilitate transmission of a load in a vehicle fore and aft direction and dispersion of the load in a vehicle lower part structure.
SOLUTION: A vehicle lower part structure has: side sills 3 provided at side parts as seen in a vehicle width direction of a floor panel; side members 4 each of which is disposed adjacent to the vehicle inner side of the side sill 3; and a lower cross member 5 provided below the floor panel. An end member 6 is joined to an end part at the outer side as seen in the vehicle width direction of the lower cross member 5, and the end member 6 is joined to the side sill 3 and the side member 4.
SELECTED DRAWING: Figure 3
COPYRIGHT: (C)2023,JPO&INPIT

Description

本発明は、車両下部構造に関する。 The present invention relates to a vehicle undercarriage.

従来の車両下部構造の中には、車両幅方向に延びるリヤシートクロスメンバと、車両前後方向に延び、車両幅方向にずれて位置するフロントフロアサイドメンバ及びリヤフロアサイドメンバを備えているものがある。そして、この車両下部構造においては、リヤシートクロスメンバがリヤフロアサイドメンバの前部とフロントフロアサイドメンバの後部とにそれぞれ接続されており、リヤフロアサイドメンバと接続されるリヤシートクロスメンバの車両幅方向外側の側部領域にビード部を設けることによって、車両側方からの衝撃荷重の入力に対して座屈変形を促すようにしている(例えば、特許文献1参照)。 Some conventional vehicle lower structures include a rear seat cross member that extends in the vehicle width direction, and a front floor side member and a rear floor side member that extend in the vehicle front-rear direction and are offset in the vehicle width direction. In this vehicle lower portion structure, the rear seat cross member is connected to the front portion of the rear floor side member and the rear portion of the front floor side member, respectively, and the rear seat cross member connected to the rear floor side member is positioned outside in the vehicle width direction. By providing the bead portion in the side region, the buckling deformation is promoted against the impact load input from the side of the vehicle (see, for example, Patent Document 1).

特開2016-107892号公報JP 2016-107892 A

このように、上述した従来の車両下部構造では、座屈変形を促すビード部を有するリヤシートクロスメンバの車両幅方向外側の側部領域にリヤフロアサイドメンバが接続されているので、車体剛性が低下することとなり、車体へ衝撃荷重が入力された場合に、フロアサイドメンバなどの車体骨格部材への荷重の伝達が不十分になるという問題を有していた。 As described above, in the above-described conventional vehicle lower portion structure, the rear floor side member is connected to the vehicle width direction outer side region of the rear seat cross member having the bead portion that promotes buckling deformation, so the vehicle body rigidity is reduced. As a result, when an impact load is input to the vehicle body, there is a problem that the load is not sufficiently transmitted to the vehicle body frame members such as the floor side members.

本発明はこのような実状に鑑みてなされたものであって、その目的は、入力された荷重の車両前後方向への伝達と荷重の分散を促進することが可能な車両下部構造を提供することにある。 SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle lower structure capable of facilitating the transmission of an input load in the longitudinal direction of the vehicle and the distribution of the load. It is in.

上記従来技術の有する課題を解決するために、本発明は、フロアパネルの車両幅方向側部に設けられ、車両前後方向に延びる左右一対のサイドシルと、該サイドシルの車両内側に隣接して配置され、車両前後方向に延びる左右一対のサイドメンバと、前記フロアパネルの下方に設けられ、車両幅方向に延びる下側クロスメンバとを有する車両下部構造において、前記下側クロスメンバには、該下側クロスメンバの車両幅方向外側の端部に接合される端部材が設けられ、前記端部材は、前記サイドシルおよび前記サイドメンバに接合されている。 In order to solve the above-described problems of the prior art, the present invention provides a pair of left and right side sills that are provided on vehicle width direction side portions of a floor panel and extend in the vehicle front-rear direction, and are arranged adjacent to the vehicle inner side of the side sills. 1. A vehicle lower portion structure having a pair of left and right side members extending in the vehicle front-rear direction, and a lower cross member provided below the floor panel and extending in the vehicle width direction, wherein the lower cross member has a lower side member. An end member is provided that is joined to the vehicle width direction outer end of the cross member, and the end member is joined to the side sill and the side member.

本発明の車両下部構造においては、外部から荷重がサイドシルなどに入力された場合に、当該入力荷重の車両前後方向への伝達を促進することができる。
しかも、本発明の車両下部構造では、下側クロスメンバに接合された端部材などによって車両幅方向及び車両前後方向に対する剛性が向上したサイドメンバに外部からの荷重が入力されることになるので、荷重の分散を促進することができる。
In the vehicle lower portion structure of the present invention, when a load is input to the side sill or the like from the outside, transmission of the input load in the longitudinal direction of the vehicle can be facilitated.
Moreover, in the vehicle lower portion structure of the present invention, an external load is input to the side members whose rigidity in the vehicle width direction and vehicle longitudinal direction is improved by the end members joined to the lower cross members. Load distribution can be facilitated.

本発明の実施形態に係る車両下部構造において、フロアパネル、サイドシル、サイドメンバ、電源部材及びクロスメンバを車両斜め下方から見た斜視図である。1 is a perspective view of a floor panel, a side sill, a side member, a power supply member, and a cross member in the vehicle lower portion structure according to the embodiment of the invention, as viewed obliquely from below the vehicle; FIG. 図1におけるZ部を拡大したものであり、電源部材を取り除いた状態で示す斜視図である。It is an enlarged view of the Z section in FIG. 1 and is a perspective view showing a state in which a power supply member is removed. 図1におけるフロアパネルの下方に設けられる下側クロスメンバの端部材及びその周辺部を、電源部材及びクロスメンバを取除いた状態で車両斜め下方から見た拡大斜視図である。FIG. 2 is an enlarged perspective view of an end member of a lower cross member provided below the floor panel in FIG. 1 and its peripheral portion, viewed obliquely from below the vehicle, with the power source member and the cross member removed; 図3における下側クロスメンバの端部材及びその周辺部を示す平面図である。FIG. 4 is a plan view showing an end member of the lower cross member in FIG. 3 and its peripheral portion; 図3における下側クロスメンバの端部材及びその周辺部をリヤサイドメンバを省略して車両後側斜め下方から見た斜視図である。FIG. 4 is a perspective view of the end member of the lower cross member in FIG. 3 and its peripheral portion, with the rear side member omitted, viewed obliquely from below on the rear side of the vehicle; 図3における下側クロスメンバの端部材及びその周辺部を車両前側斜め下方から見た斜視図である。FIG. 4 is a perspective view of the end member of the lower cross member in FIG. 3 and its peripheral portion viewed obliquely from below the front side of the vehicle; 図3における下側クロスメンバの端部材及びその周辺部を車両側方の外側から見た側面図である。FIG. 4 is a side view of the end member of the lower cross member in FIG. 3 and its peripheral portion as seen from the outside of the side of the vehicle;

以下、本発明を図示の実施の形態に基づいて詳細に説明する。
なお、図において、矢印Fr方向は車両前方を示し、矢印L方向は車両下方を示し、矢印I方向は車両幅方向内側を示している。また、矢印X方向は車両幅方向を示し、矢印Y方向は車両前後方向を示している。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on the illustrated embodiments.
In the drawings, the direction of arrow Fr indicates the front of the vehicle, the direction of arrow L indicates the lower side of the vehicle, and the direction of arrow I indicates the inside in the width direction of the vehicle. The arrow X direction indicates the vehicle width direction, and the arrow Y direction indicates the vehicle front-rear direction.

図1~図7は本発明の実施形態に係る車両下部構造を示すものである。本実施形態の車両下部構造は、図1及び図2に示すように、車両幅方向及び車両前後方向に展開し、車両前後方向に沿って車両前後に配置され、フロアパネルを構成するフロントフロアパネル1及びリヤフロアパネル2と、これらフロントフロアパネル1及びリヤフロアパネル2の車両幅方向側部に設けられ、車両前後方向に延びる左右一対のサイドシル3と、該サイドシル3の車両内側に隣接して配置され、車両前後方向に延びる左右一対のサイドメンバ4と、フロントフロアパネル1及びリヤフロアパネル2の下方に設けられ、車両幅方向に延びる下側クロスメンバ5とを有しており、フロントフロアパネル1は、車両上下方向でリヤフロアパネル2よりも低い位置に設けられている。 1 to 7 show a vehicle lower structure according to an embodiment of the invention. As shown in FIGS. 1 and 2, the vehicle lower portion structure of the present embodiment extends in the vehicle width direction and the vehicle front-rear direction, and is arranged in the vehicle front-rear direction along the vehicle front-rear direction to form a front floor panel. 1 and a rear floor panel 2, a pair of left and right side sills 3 provided on the vehicle width direction side portions of the front floor panel 1 and the rear floor panel 2 and extending in the vehicle front-rear direction, and the side sills 3 are arranged adjacent to the vehicle inner side of the side sills 3. , a pair of left and right side members 4 extending in the longitudinal direction of the vehicle, and a lower cross member 5 provided below the front floor panel 1 and the rear floor panel 2 and extending in the width direction of the vehicle. , is provided at a position lower than the rear floor panel 2 in the vertical direction of the vehicle.

本実施形態のフロントフロアパネル1は、図6に示すように、車両幅方向外側に位置し、サイドシル3と接合するフロア側面部11と、該フロア側面部11より車両幅方向内側に位置し、車両内側へ向かって上り傾斜するフロア傾斜面部12と、該フロア傾斜面部12の車両幅方向内側に位置し、車両幅方向に平坦なフロア中央面部13とを有している。そのため、フロントフロアパネル1は、車両上方へ底上げされた構造となっており、フロア中央面部13は、フロア側面部11及びフロア傾斜面部12よりも高い位置に設けられている。
そして、本実施形態の車両下部構造において、サイドシル3は、図1~図7に示すように、車両前後の位置に設けられ、端部が互いに接合されるフロントサイドシル31とリヤサイドシル32を有している。また、サイドメンバ4は、車両前後の位置に設けられるフロントサイドメンバ41及びリヤサイドメンバ42を有しており、下側クロスメンバ5は、左右一対のフロントサイドメンバ41に接合されている。しかも、リヤサイドメンバ42は、車両後方へ向かうほど車両内側に位置するように延びており、車両前後方向の中間部分に位置する後述の下面部42bには、サスペンションアーム取付部40が接合されて設けられており、該サスペンションアーム取付部40は、リヤサイドシル32の側面にも接合されている。
As shown in FIG. 6, the front floor panel 1 of the present embodiment includes a floor side portion 11 positioned outside in the vehicle width direction and joined to the side sill 3, and positioned inside the floor side portion 11 in the vehicle width direction. It has a floor inclined surface portion 12 that slopes upward toward the inside of the vehicle, and a floor central surface portion 13 that is located inside the floor inclined surface portion 12 in the vehicle width direction and is flat in the vehicle width direction. Therefore, the front floor panel 1 has a structure in which the bottom is raised toward the upper side of the vehicle, and the floor center surface portion 13 is provided at a position higher than the floor side surface portion 11 and the floor inclined surface portion 12 .
In the vehicle lower portion structure of the present embodiment, the side sills 3 have front side sills 31 and rear side sills 32 which are provided at front and rear positions of the vehicle and whose ends are joined to each other, as shown in FIGS. ing. The side member 4 has a front side member 41 and a rear side member 42 which are provided at front and rear positions of the vehicle. Moreover, the rear side member 42 extends so as to be located inward of the vehicle toward the rear of the vehicle. The suspension arm mounting portion 40 is also joined to the side surface of the rear side sill 32 .

また、本実施形態の下側クロスメンバ5には、図2~図7に示すように、下側クロスメンバ5の車両幅方向外側に配置される端部材6が設けられており、該端部材6の内側端部は、下側クロスメンバ5の車両幅方向外側の端部に接合されている。そして、本実施形態の端部材6は、サイドシル3のフロントサイドシル31及びリヤサイドシル32と、サイドメンバ4のフロントサイドメンバ41及びリヤサイドメンバ42に接合されており、フロントサイドメンバ41の後端部41aとリヤサイドメンバ42の前端部42aとは、車両前方視で重なり合うように配置されている。すなわち、リヤサイドメンバ42は、車両幅方向及び車両前後方向に対する剛性が向上した構造に構成されている。しかも、端部材6は、サイドシル3及びサイドメンバ4の形状と対応した形状に屈曲形成されており、これによって、接合するサイドシル3及びサイドメンバ4に重ね合わせることが可能な構造となっている。
また、本実施形態の車両下部構造は、サイドシル3及びサイドメンバ4に加わった荷重が車両前後方向へ円滑に伝達され、かつ、車両幅方向及び車両前後方向に対する剛性が向上したリヤサイドメンバ42に荷重が入力されることになるため、荷重の分散が促進されるようになっている。さらに、リヤサイドメンバ42の剛性が向上することに伴って、サスペンションアーム取付部40からリヤサイドメンバ42に入力される振動が低減され、フロア振動及びロードノイズが改善されることになる。なお、端部材6が下側クロスメンバ5と別部材で形成されていると、板厚を変更することによりサイドシル3及びサイドメンバ4との接合部における剛性のコントロールが容易となる上、成形加工が簡単となる。
Further, as shown in FIGS. 2 to 7, the lower cross member 5 of the present embodiment is provided with an end member 6 arranged outside the lower cross member 5 in the vehicle width direction. 6 is joined to the vehicle width direction outer end of the lower cross member 5 . The end member 6 of the present embodiment is joined to the front side sill 31 and rear side sill 32 of the side sill 3 and to the front side member 41 and rear side member 42 of the side member 4. and the front end portion 42a of the rear side member 42 are arranged so as to overlap each other when viewed from the front of the vehicle. In other words, the rear side member 42 is configured to have improved rigidity in the vehicle width direction and the vehicle front-rear direction. Moreover, the end member 6 is bent into a shape corresponding to the shape of the side sill 3 and the side member 4, thereby providing a structure that can be superimposed on the side sill 3 and the side member 4 to be joined.
Further, in the vehicle lower portion structure of the present embodiment, the load applied to the side sills 3 and the side members 4 is smoothly transmitted in the longitudinal direction of the vehicle, and the load is transferred to the rear side members 42 having improved rigidity in the vehicle width direction and the vehicle longitudinal direction. is input, the distribution of the load is facilitated. Further, as the rigidity of the rear side member 42 is improved, the vibration input from the suspension arm attachment portion 40 to the rear side member 42 is reduced, thereby improving floor vibration and road noise. If the end member 6 is formed as a separate member from the lower cross member 5, it becomes easier to control the rigidity at the junction between the side sill 3 and the side member 4 by changing the thickness of the plate, and the molding process can be performed. becomes easier.

本実施形態の端部材6は、図3~図7に示すように、車両前方側がフロントサイドメンバ41に接合されており、端部材6の車両後方側には、サイドシル3のリヤサイドシル32に接合される後壁61を有している。そして、端部材6とリヤサイドメンバ42とは、後壁61とリヤサイドメンバ42とが重なり合った状態で、接合されている。この後壁61は、車両前後方向及び車両上下方向に延びており、端部材6の後壁61がリヤサイドシル32と接合されることによって、端部材6の車両幅方向及び車両上下方向に対する剛性が向上するように構成されている。また、高い剛性を有する端部材6がサイドシル3のフロントサイドシル31及びリヤサイドシル32に接合されることによって、より一層剛性が向上した構造が得られるようになっている。さらに、端部材6の後壁61が位置する箇所には、図7に示すように、車両内側及び車両外側に車両後方へ延びる側壁部7aを有するバルク部材7が車両上下方向に沿って配置されており、このバルク部材7の側壁部7aは、リヤサイドメンバ42に接合されているとともに、後壁61及びリヤサイドシル32に接合されている。これによって、端部材6の後壁61が位置する箇所は、更に剛性が高められた構造となっている。
なお、リヤサイドメンバ42は、フロントサイドメンバ41に比べて端部材6と接合される断面積が大きいが、後壁61を介してリヤサイドメンバ42に接合されているため、フロントサイドメンバ41との接合断面積に影響されない構造となっている。
3 to 7, the end member 6 of the present embodiment is joined to the front side member 41 on the front side of the vehicle, and joined to the rear side sill 32 of the side sill 3 on the rear side of the vehicle. It has a rear wall 61 that is The end member 6 and the rear side member 42 are joined together with the rear wall 61 and the rear side member 42 overlapping each other. The rear wall 61 extends in the longitudinal direction of the vehicle and in the vertical direction of the vehicle, and by joining the rear wall 61 of the end member 6 to the rear side sill 32, the rigidity of the end member 6 in the vehicle width direction and the vehicle vertical direction is increased. configured to improve. In addition, by joining the end member 6 having high rigidity to the front side sill 31 and the rear side sill 32 of the side sill 3, a structure with further improved rigidity can be obtained. Furthermore, as shown in FIG. 7, a bulk member 7 having side wall portions 7a extending rearward of the vehicle is arranged along the vehicle vertical direction on the vehicle inner side and the vehicle outer side at the location where the rear wall 61 of the end member 6 is positioned. A side wall portion 7 a of the bulk member 7 is joined to the rear side member 42 and also joined to the rear wall 61 and the rear side sill 32 . As a result, the portion where the rear wall 61 of the end member 6 is located has a structure with increased rigidity.
Although the rear side member 42 has a larger cross-sectional area where it is joined to the end member 6 than the front side member 41 , since it is joined to the rear side member 42 via the rear wall 61 , the joint to the front side member 41 It has a structure that is not affected by the cross-sectional area.

また、本実施形態の端部材6の後壁61は、図3及び図5に示すように、下側クロスメンバ5の車両後方側に位置する後側段差壁51で接合される後側接合部61a有しており、後壁61の下側角部には、後側稜線R1が車両幅方向に沿って滑らかに延びている。しかも、後側段差壁51は、フロントフロアパネル1の車両幅方向内側に位置する平坦なフロア中央面部13まで延びている。これにより、端部材6に入力される荷重は、下側クロスメンバ5の後側段差壁51に伝達されることになる。さらに、後壁61は、車両幅方向及び車両上下方向に対して高い剛性を有し、かつ後側段差壁51にも接合されるため、車両幅方向及び車両上下方向に対してより一層高い剛性を有することになる。そして、下側クロスメンバ5の剛性が向上することに伴って、リヤサイドメンバ42の剛性も向上することになる。
一方、端部材6の車両前方側には、図3~図6に示すように、車両上下方向に延びる前壁62が形成されており、該前壁62は、下側クロスメンバ5の車両前方側に位置する前側段差壁52で接合される前側接合部62a有している。そして、前壁62の下側角部には、前側稜線R2が車両幅方向に沿って滑らかに延びているとともに、フロントサイドメンバ41に沿うように延びている。
3 and 5, the rear wall 61 of the end member 6 of the present embodiment is a rear joint portion joined by the rear stepped wall 51 located on the vehicle rear side of the lower cross member 5. 61a, and a rear ridge line R1 smoothly extends along the vehicle width direction at the lower corner of the rear wall 61. As shown in FIG. Moreover, the rear side stepped wall 51 extends to the flat floor center surface portion 13 positioned inside the front floor panel 1 in the vehicle width direction. As a result, the load input to the end member 6 is transmitted to the rear stepped wall 51 of the lower cross member 5 . Further, the rear wall 61 has high rigidity in the vehicle width direction and the vehicle vertical direction, and is also joined to the rear stepped wall 51, so that the rigidity in the vehicle width direction and the vehicle vertical direction is further increased. will have As the rigidity of the lower cross member 5 is improved, the rigidity of the rear side member 42 is also improved.
On the vehicle front side of the end member 6, on the other hand, as shown in FIGS. 3 to 6, a front wall 62 extending in the vertical direction of the vehicle is formed. It has a front joint portion 62a joined by the front stepped wall 52 located on the side. At the lower corner of the front wall 62, a front ridge line R2 extends smoothly along the width direction of the vehicle and along the front side member 41. As shown in FIG.

また、本実施形態の車両下部構造において、下側クロスメンバ5は、図3~図6に示すように、フロントサイドメンバ41よりも車両上方に配置されており、下側クロスメンバとフロントサイドメンバ41とが接合されるフロントフロアパネル1の境界部分には、フロントサイドメンバ41から車両内側へ向かって上り傾斜するフロア傾斜面部12が設けられている。一方、端部材6は、下側クロスメンバ5に向かって延出する延出部63を有しており、該延出部63は、フロア傾斜面部12の位置で下側クロスメンバ5と接合している。すなわち、延出部63がフロア傾斜面部12の範囲内に位置するため、フロントサイドメンバ41が下側クロスメンバ5及び端部材6によって車両下方から支持されることになる。 Further, in the vehicle lower portion structure of the present embodiment, the lower cross member 5 is arranged above the front side member 41 in the vehicle, as shown in FIGS. At the boundary of the front floor panel 1 where the front side member 41 is joined, a floor inclined surface portion 12 that slopes upward from the front side member 41 toward the inside of the vehicle is provided. On the other hand, the end member 6 has an extension portion 63 extending toward the lower cross member 5 , and the extension portion 63 joins the lower cross member 5 at the floor inclined surface portion 12 . ing. That is, since the extending portion 63 is positioned within the range of the floor inclined surface portion 12, the front side member 41 is supported by the lower cross member 5 and the end member 6 from below the vehicle.

さらに、本実施形態の車両下部構造において、フロア傾斜面部12に位置する延出部63は、図3~図6に示すように、車両外側に向かうほど車両下側に勾配する勾配部分63aを有しており、該勾配部分63aは、フロントサイドメンバ41(またはリヤサイドメンバ42)まで連続して形成されている。これにより、下側クロスメンバ5がフロントサイドメンバ41(またはリヤサイドメンバ42)を支持する剛性が車両幅方向だけでなく、車両上下方向に対しても高められるようになっている。 Further, in the vehicle lower portion structure of the present embodiment, the extending portion 63 positioned on the floor inclined surface portion 12 has a sloped portion 63a that slopes downward toward the vehicle outer side, as shown in FIGS. The sloped portion 63a is formed continuously up to the front side member 41 (or the rear side member 42). As a result, the rigidity with which the lower cross member 5 supports the front side member 41 (or the rear side member 42) is increased not only in the vehicle width direction but also in the vehicle vertical direction.

本実施形態の車両下部構造において、フロントフロアパネル1及びリヤフロアパネル2の下方には、図1に示すように、電源部材(例えば、バッテリ等)10が設けられている。すなわち、フロントフロアパネル1は、フロア中央面部13の箇所が車両上方へ底上げされ、フロア中央面部13の高さ位置がフロア側面部11及びフロア傾斜面部12よりも車両上方に位置しており、電源部材10は、フロア中央面部13の下方に形成された空間内に収納されて搭載可能に構成されている。しかも、フロア中央面部13の下方の空間内に収納された状態の電源部材10は、車両側方視でサイドシル3のフロントサイドシル31及びリヤサイドシル32と重なり合うように配置されているとともに、車両幅方向に延びる複数本のクロスメンバ8によって支持されている。そのため、フロントフロアパネル1が底上げされた構造であっても、側突時の衝撃荷重から電源部材10を保護できる構造となっている。なお、クロスメンバ8は、電源部材10の車両幅方向の寸法よりも長く形成され、かつ、電源部材10の車両前後方向の長さに対応可能な本数が使用され、車両前後方向に所定の間隔を空けて配置されている。
一方、本実施形態のリヤサイドメンバ42には、クロスメンバ8の車両幅方向の端部8aを締結部材などで接合するクロスメンバ接合部42Aが設けられており、該クロスメンバ接合部42Aは、車両下方視でサイドシル3の車両前後方向の範囲に配置されている。すなわち、本実施形態の車両下部構造では、車両前方から車両後方へ向かって、端部材6、クロスメンバ接合部42A、サスペンションアーム取付部40の順に配置されていることになる。
これによって、クロスメンバ8の端部8aは、クロスメンバ接合部42Aを介してリヤサイドメンバ42に接合されるため、リヤサイドメンバ42の車両幅方向に対する剛性を向上させる構造が得られることになる。しかも、クロスメンバ接合部42Aは、サイドシル3の車両前後方向の範囲に配置されており、車両幅方向の両側から剛性部材をリヤサイドメンバ42に接合するような構造となっている。
In the vehicle lower portion structure of the present embodiment, a power supply member (for example, a battery, etc.) 10 is provided below the front floor panel 1 and the rear floor panel 2, as shown in FIG. That is, the front floor panel 1 has a floor center surface portion 13 that is raised upward in the vehicle, and the height position of the floor center surface portion 13 is located above the vehicle relative to the floor side surface portion 11 and the floor inclined surface portion 12. The member 10 is configured to be accommodated and mounted in a space formed below the floor center surface portion 13 . Moreover, the power supply member 10 in the state of being accommodated in the space below the floor central surface portion 13 is arranged so as to overlap the front side sill 31 and the rear side sill 32 of the side sill 3 when viewed from the side of the vehicle, and is arranged in the vehicle width direction. It is supported by a plurality of cross members 8 extending to the Therefore, even if the front floor panel 1 has a raised structure, the power source member 10 can be protected from the impact load in the event of a side collision. The cross member 8 is formed longer than the dimension of the power supply member 10 in the width direction of the vehicle, and the number of cross members 8 that can correspond to the length of the power supply member 10 in the front-rear direction of the vehicle is used. are spaced apart.
On the other hand, the rear side member 42 of the present embodiment is provided with a cross member joint portion 42A that joins the vehicle width direction end portion 8a of the cross member 8 with a fastening member or the like. It is arranged in the range of the side sill 3 in the longitudinal direction of the vehicle when viewed from below. That is, in the vehicle lower portion structure of the present embodiment, the end member 6, the cross member joint portion 42A, and the suspension arm mounting portion 40 are arranged in this order from the front of the vehicle toward the rear of the vehicle.
As a result, the end portion 8a of the cross member 8 is joined to the rear side member 42 via the cross member joint portion 42A, so that a structure is obtained in which the rigidity of the rear side member 42 in the vehicle width direction is improved. Moreover, the cross member joint portion 42A is arranged in the range of the side sill 3 in the vehicle front-rear direction, and has a structure in which the rigid member is joined to the rear side member 42 from both sides in the vehicle width direction.

また、本実施形態の車両下部構造において、リヤサイドメンバ42は、図3及び図4に示すように、車両下方に位置する下面部42bと、車両幅方向に位置する側面部42cを有している。そして、クロスメンバ接合部42Aには、クロスメンバ接合部ブラケット43が設けられており、該クロスメンバ接合部ブラケット43は、リヤサイドメンバ42の下面部42b及び側面部42cに接合されている。そのため、クロスメンバ接合部ブラケット43は、クロスメンバ8の端部8aを接合する上面が四角形状を有し、かつ周囲の側壁が車両上下方向に延びており、車両内側の上部43aは、リヤサイドメンバ42の側面部42cまで延びて重ね合わされ、車両前後側の上部43b,43c及び車両外側の上部43dはリヤサイドメンバ42の下面部42bに沿って折り曲げられて重ね合されるように形成され、重ね合わせ部が接合されるように構成されている。
そのため、本実施形態の車両下部構造においては、クロスメンバ接合部ブラケット43がリヤサイドメンバ42の下面部42bに接合されることにより、車両幅方向及び車両前後方向に対する剛性が向上し、また、クロスメンバ接合部ブラケット43がリヤサイドメンバ42の側面部42cに接合されることにより、車両前後方向及び車両上下方向に対する剛性が向上することになり、リヤサイドメンバ42への荷重伝達が促進されるようになっている。
In the vehicle lower portion structure of the present embodiment, the rear side member 42 has, as shown in FIGS. 3 and 4, a lower surface portion 42b positioned below the vehicle and a side surface portion 42c positioned in the vehicle width direction. . A cross member joint bracket 43 is provided at the cross member joint 42A, and the cross member joint bracket 43 is joined to the lower surface 42b and the side surface 42c of the rear side member 42. As shown in FIG. Therefore, the cross member joint portion bracket 43 has a rectangular upper surface that joins the end portion 8a of the cross member 8, and has a peripheral side wall extending in the vertical direction of the vehicle. The upper parts 43b, 43c on the front and rear sides of the vehicle and the upper part 43d on the outer side of the vehicle are bent along the lower surface part 42b of the rear side member 42 and overlapped. are configured to be joined together.
Therefore, in the vehicle lower portion structure of the present embodiment, the cross member joint portion bracket 43 is joined to the lower surface portion 42b of the rear side member 42, thereby improving the rigidity in the vehicle width direction and the vehicle longitudinal direction. By joining the joint portion bracket 43 to the side portion 42c of the rear side member 42, the rigidity in the longitudinal direction and the vertical direction of the vehicle is improved, and the transmission of load to the rear side member 42 is facilitated. there is

さらに、本実施形態の車両下部構造において、クロスメンバ接合部42Aの車両幅方向外側には、図2~図4に示すように、ジャッキアップブラケット9が設けられており、該ジャッキアップブラケット9は、リヤサイドシル32及びリヤサイドメンバ42に接合されている。これによって、各種部材の接合部がクロスメンバ接合部42Aの設置範囲に集中することになり、クロスメンバ接合部42Aの周辺部の車両幅方向に対する剛性が向上し、クロスメンバ接合部42Aの周辺部の荷重伝達が促進される構造が得られることになる。 Further, in the vehicle lower portion structure of the present embodiment, a jack-up bracket 9 is provided outside the cross member joint portion 42A in the vehicle width direction, as shown in FIGS. , the rear side sill 32 and the rear side member 42 . As a result, the joints of various members are concentrated in the installation range of the cross member joint 42A, and the rigidity of the periphery of the cross member joint 42A in the vehicle width direction is improved. Therefore, a structure is obtained in which the load transmission of is promoted.

このように、本発明の実施形態に係る車両下部構造では、フロアパネル(フロントフロアパネル1及びリヤフロアパネル2)の車両幅方向側部に設けられ、車両前後方向に延びる左右一対のサイドシル3と、サイドシル3の車両内側に隣接して配置され、車両前後方向に延びる左右一対のサイドメンバ4と、フロアパネル1,2の下方に設けられ、車両幅方向に延びる下側クロスメンバ5とを有している。サイドメンバ4は、車両前後の位置に設けられるフロントサイドメンバ41及びリヤサイドメンバ42を有しており、下側クロスメンバ5は、左右一対のフロントサイドメンバ41に接合されている。また、下側クロスメンバ5には、下側クロスメンバ5の車両幅方向外側の端部に接合される端部材6が設けられており、端部材6は、サイドシル3、フロントサイドメンバ41及びリヤサイドメンバ42に接合されている。そして、フロントサイドメンバ41の後端部41aとリヤサイドメンバ42の前端部42aとは、車両前方視で重なり合うように配置されている。
したがって、本実施形態の車両下部構造においては、下側クロスメンバ5に接合された端部材6がサイドシル3、フロントサイドメンバ41及びリヤサイドメンバ42のそれぞれと接合され、フロントサイドメンバ41の後端部41aとリヤサイドメンバ42の前端部42aとが、車両前方視で重なり合っているので、車両側方などから荷重がサイドシル3等に入力された場合に、当該入力荷重を車両前後方向へ迅速かつ確実に伝達でき、車両前後方向の荷重伝達を促進することができる。
また、本実施形態の車両下部構造では、下側クロスメンバ5に接合された端部材6によってリヤサイドメンバ41の車両幅方向及び車両前後方向に対する剛性が向上しており、当該高剛性のリヤサイドメンバ41に外部からの荷重が入力されることになるので、荷重の分散効果を高めることができる。
As described above, in the vehicle lower portion structure according to the embodiment of the present invention, the pair of left and right side sills 3 provided on the vehicle width direction side portions of the floor panels (the front floor panel 1 and the rear floor panel 2) and extending in the vehicle front-rear direction; It has a pair of left and right side members 4 arranged adjacent to the vehicle inner side of the side sill 3 and extending in the vehicle front-rear direction, and a lower cross member 5 provided below the floor panels 1 and 2 and extending in the vehicle width direction. ing. The side member 4 has a front side member 41 and a rear side member 42 which are provided at front and rear positions of the vehicle. In addition, the lower cross member 5 is provided with an end member 6 that is joined to an outer end portion of the lower cross member 5 in the vehicle width direction. It is joined to member 42 . The rear end portion 41a of the front side member 41 and the front end portion 42a of the rear side member 42 are arranged so as to overlap each other when viewed from the front of the vehicle.
Therefore, in the vehicle lower portion structure of this embodiment, the end member 6 joined to the lower cross member 5 is joined to each of the side sill 3, the front side member 41 and the rear side member 42, and the rear end portion of the front side member 41 41a and the front end portion 42a of the rear side member 42 overlap each other when viewed from the front of the vehicle. Therefore, when a load is input to the side sill 3 or the like from the side of the vehicle, the input load can be quickly and reliably transferred in the longitudinal direction of the vehicle. can be transmitted, and the load transmission in the longitudinal direction of the vehicle can be facilitated.
Further, in the vehicle lower portion structure of the present embodiment, the rigidity of the rear side member 41 in the vehicle width direction and the vehicle longitudinal direction is improved by the end member 6 joined to the lower cross member 5. Since the load from the outside is input to the , the load dispersing effect can be enhanced.

また、本実施形態の車両下部構造において、端部材6は、車両前方側がフロントサイドメンバ41に接合され、端部材6の車両後方側には、サイドシル3に接合される後壁61を有しており、端部材6とリヤサイドメンバ42とは、後壁61とリヤサイドメンバ42とが重なり合った状態で、接合されている。
したがって、本実施形態の車両下部構造では、端部材6の車両幅方向及び車両上下方向に対する剛性が向上することになるので、高剛性の端部材6をサイドシル3のフロントサイドシル31及びリヤサイドシル32に接合させることによって、より一層の剛性向上を図ることができ、入力荷重の周辺部品への伝達及び分散を効果的に行うことができる。
In the vehicle lower portion structure of the present embodiment, the end member 6 is joined to the front side member 41 on the vehicle front side, and has a rear wall 61 joined to the side sill 3 on the vehicle rear side of the end member 6 . The end member 6 and the rear side member 42 are joined together with the rear wall 61 and the rear side member 42 overlapping each other.
Therefore, in the vehicle lower portion structure of the present embodiment, the rigidity of the end member 6 in the vehicle width direction and the vehicle vertical direction is improved. By bonding, it is possible to further improve the rigidity, and effectively transmit and disperse the input load to the peripheral parts.

そして、本実施形態の車両下部構造において、端部材6の後壁61は、下側クロスメンバ5の車両後部側に位置する後側段差壁51で接合される後側接合部61aを有しており、後側段差壁51は、フロアパネルであるフロントフロアパネル1の車両幅方向内側に位置する平坦なフロア中央面部13まで延びている。
したがって、本実施形態の車両下部構造によれば、端部材6に入力される荷重を下側クロスメンバ5の後側段差壁51に円滑に伝達させることができる。また、後壁61は、車両幅方向及び車両上下方向に対して高い剛性を有し、かつ後側段差壁51にも接合されるため、車両幅方向及び車両上下方向に対して更なる剛性向上を図ることができる。しかも、下側クロスメンバ5の剛性が向上することによって、リヤサイドメンバ42の剛性もより一層高めることができる。
In the vehicle lower portion structure of the present embodiment, the rear wall 61 of the end member 6 has a rear joint portion 61a joined by the rear stepped wall 51 located on the vehicle rear side of the lower cross member 5. The rear stepped wall 51 extends to the flat floor center surface portion 13 located inside the front floor panel 1 in the vehicle width direction.
Therefore, according to the vehicle lower portion structure of the present embodiment, the load input to the end member 6 can be smoothly transmitted to the rear stepped wall 51 of the lower cross member 5 . In addition, the rear wall 61 has high rigidity in the vehicle width direction and the vehicle vertical direction, and is also joined to the rear stepped wall 51, so that the rigidity in the vehicle width direction and the vehicle vertical direction is further improved. can be achieved. Moreover, by improving the rigidity of the lower cross member 5, the rigidity of the rear side member 42 can be further increased.

さらに、本実施形態の車両下部構造において、下側クロスメンバ5は、フロントサイドメンバ41よりも車両上方に配置されており、下側クロスメンバ5とフロントサイドメンバ41とが接合されるフロントフロアパネル1(フロアパネル)の境界部分には、フロントサイドメンバ41から車両内側へ向かって上り傾斜するフロア傾斜面部12が設けられている。端部材6は、下側クロスメンバ5に向かって延出する延出部63を有しており、延出部63は、フロア傾斜面部12の位置で下側クロスメンバ5と接合している。
したがって、本実施形態の車両下部構造では、延出部63がフロア傾斜面部12の範囲内に位置することになるので、下側クロスメンバ5及び端部材6によってフロントサイドメンバ41を車両下方から支持することが可能となり、フロントサイドメンバ41の剛性を向上させ、入力荷重の車両前後方向への伝達効果を高めることができる。
Furthermore, in the vehicle lower portion structure of the present embodiment, the lower cross member 5 is arranged above the front side member 41 in the vehicle, and the lower cross member 5 and the front side member 41 are joined to each other in the front floor panel. 1 (floor panel) is provided with a floor slope portion 12 that slopes upward from the front side member 41 toward the inside of the vehicle. The end member 6 has an extension portion 63 extending toward the lower cross member 5 , and the extension portion 63 is joined to the lower cross member 5 at the floor inclined surface portion 12 .
Therefore, in the vehicle lower portion structure of the present embodiment, the extending portion 63 is positioned within the range of the floor inclined surface portion 12, so that the lower cross member 5 and the end member 6 support the front side member 41 from below the vehicle. , the rigidity of the front side member 41 can be improved, and the effect of transmitting the input load in the longitudinal direction of the vehicle can be enhanced.

そして、本実施形態の車両下部構造において、フロア傾斜面部12に位置する延出部63は、車両外側に向かうほど車両下側に勾配する勾配部分63aを有しており、勾配部分63aは、フロントサイドメンバ41(またはリヤサイドメンバ42)まで連続して形成されている。したがって、本実施形態の車両下部構造によれば、下側クロスメンバ5がフロントサイドメンバ41(またはリヤサイドメンバ42)を支持する剛性を車両幅方向のみならず、車両上下方向に対しても向上させることが可能となり、入力荷重の分散効果を更に高めることができる。 In the vehicle lower portion structure of the present embodiment, the extending portion 63 positioned on the floor inclined surface portion 12 has a sloped portion 63a that slopes downward toward the vehicle outer side. It is formed continuously up to the side member 41 (or the rear side member 42). Therefore, according to the vehicle lower portion structure of the present embodiment, the rigidity with which the lower cross member 5 supports the front side member 41 (or the rear side member 42) is improved not only in the vehicle width direction but also in the vehicle vertical direction. This makes it possible to further enhance the effect of dispersing the input load.

また、本実施形態の車両下部構造において、フロントフロアパネル1及びリヤフロアパネル2(フロアパネル)の下方には電源部材10が設けられており、電源部材10は、車両側方視でサイドシル3と重なり合うように配置されているとともに、車両幅方向に延びるクロスメンバ8によって支持されている。そして、リヤサイドメンバ42には、クロスメンバ8を接合するクロスメンバ接合部42Aが設けられており、クロスメンバ接合部42Aは、車両下方視でサイドシル3の車両前後方向の範囲に配置されている。
したがって、本実施形態の車両下部構造によれば、クロスメンバ8の端部8aが、クロスメンバ接合部42Aを介してリヤサイドメンバ42に接合されることになるので、リヤサイドメンバ42の車両幅方向に対する剛性を向上させることができる。また、クロスメンバ接合部42Aは、サイドシル3の車両前後方向の範囲に配置され、車両幅方向の両側から剛性部材がリヤサイドメンバ42に接合されることになるので、リヤサイドメンバ42の車両前後方向に対する剛性も向上させることができ、リヤサイドメンバ42に入力された荷重を車両前後方向に効果的に伝達することができる。
Further, in the vehicle lower portion structure of the present embodiment, a power supply member 10 is provided below the front floor panel 1 and the rear floor panel 2 (floor panel), and the power supply member 10 overlaps the side sill 3 when viewed from the side of the vehicle. and supported by a cross member 8 extending in the width direction of the vehicle. The rear side member 42 is provided with a cross member joint portion 42A that joins the cross member 8, and the cross member joint portion 42A is arranged in the range of the side sill 3 in the vehicle front-rear direction when viewed from below the vehicle.
Therefore, according to the vehicle lower portion structure of the present embodiment, the end portion 8a of the cross member 8 is joined to the rear side member 42 via the cross member joint portion 42A. Rigidity can be improved. In addition, the cross member joint portion 42A is arranged in the range of the side sill 3 in the longitudinal direction of the vehicle, and the rigid member is joined to the rear side member 42 from both sides in the lateral direction of the vehicle. Rigidity can also be improved, and the load input to the rear side member 42 can be effectively transmitted in the longitudinal direction of the vehicle.

さらに、本実施形態の車両下部構造において、リヤサイドメンバ42は、車両下方に位置する下面部42bと、車両幅方向に位置する側面部42cを有している。そして、クロスメンバ接合部42Aには、クロスメンバ接合部ブラケット43が設けられており、クロスメンバ接合部ブラケット43は、リヤサイドメンバ42の下面部42b及び側面部42cに接合されている。
したがって、本実施形態の車両下部構造では、クロスメンバ接合部ブラケット43がリヤサイドメンバ42の下面部42bに接合されることにより、リヤサイドメンバ42の車両幅方向及び車両前後方向に対する剛性を向上させ、クロスメンバ接合部ブラケット43がリヤサイドメンバ42の側面部42cに接合されることにより、リヤサイドメンバ42の車両前後方向及び車両上下方向に対する剛性を向上させることが可能となるので、リヤサイドメンバ42への荷重伝達を促進することができる。
Furthermore, in the vehicle lower portion structure of the present embodiment, the rear side member 42 has a lower surface portion 42b positioned below the vehicle and a side surface portion 42c positioned in the vehicle width direction. A cross member joint bracket 43 is provided at the cross member joint 42A, and the cross member joint bracket 43 is joined to the lower surface portion 42b and the side surface portion 42c of the rear side member 42. As shown in FIG.
Therefore, in the vehicle lower portion structure of the present embodiment, the cross member joint portion bracket 43 is joined to the lower surface portion 42b of the rear side member 42, thereby improving the rigidity of the rear side member 42 in the vehicle width direction and the vehicle longitudinal direction. By joining the member joint portion bracket 43 to the side surface portion 42c of the rear side member 42, it is possible to improve the rigidity of the rear side member 42 in the longitudinal direction of the vehicle and the vertical direction of the vehicle. can promote

以上、本発明の実施の形態につき述べたが、本発明は既述の実施の形態に限定されるものではなく、本発明の技術的思想に基づいて各種の変形及び変更が可能である。
例えば、電源部材10の大きさ及び形状は、図1に示すものに限られず、クロスメンバ8によって支持することが可能であれば、適用車種などに応じて他の大きさ及び形状の電源部材を搭載することもできる。
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes are possible based on the technical idea of the present invention.
For example, the size and shape of the power source member 10 are not limited to those shown in FIG. It can also be installed.

1 フロントフロアパネル
2 リヤフロアパネル
3 サイドシル
4 サイドメンバ
5 下側クロスメンバ
6 端部材
8 クロスメンバ
8a 車両幅方向の端部
10 電源部材
11 フロア側面部
12 フロア傾斜面部
13 フロア中央面部
31 フロントサイドシル
32 リヤサイドシル
41 フロントサイドメンバ
41a 後端部
42 リヤサイドメンバ
42A クロスメンバ接合部
42a 前端部
42b 下面部
42c 側面部
43 クロスメンバ接合部ブラケット
51 後側段差壁
61 端部材の後壁
61a 後側接合部
62 端部材の前壁
62a 前側接合部
63 延出部
63a 勾配部分
Reference Signs List 1 front floor panel 2 rear floor panel 3 side sill 4 side member 5 lower cross member 6 end member 8 cross member 8a end in vehicle width direction 10 power supply member 11 floor side surface 12 floor inclined surface 13 floor central surface 31 front side sill 32 rear Side sill 41 Front side member 41a Rear end 42 Rear side member 42A Cross member joint 42a Front end 42b Lower surface 42c Side 43 Cross member joint bracket 51 Rear stepped wall 61 Rear wall of end member 61a Rear joint 62 End Front wall of member 62a Front joint 63 Extension 63a Inclined portion

Claims (8)

フロアパネルの車両幅方向側部に設けられ、車両前後方向に延びる左右一対のサイドシルと、
該サイドシルの車両内側に隣接して配置され、車両前後方向に延びる左右一対のサイドメンバと、
前記フロアパネルの下方に設けられ、車両幅方向に延びる下側クロスメンバとを有する車両下部構造において、
前記下側クロスメンバには、該下側クロスメンバの車両幅方向外側の端部に接合される端部材が設けられ、
前記端部材は、前記サイドシルおよび前記サイドメンバに接合されていることを特徴とする車両下部構造。
a pair of left and right side sills provided on vehicle width direction side portions of the floor panel and extending in the vehicle front-rear direction;
a pair of left and right side members arranged adjacent to the vehicle inner side of the side sill and extending in the vehicle front-rear direction;
In a vehicle lower portion structure having a lower cross member provided below the floor panel and extending in the vehicle width direction,
The lower cross member is provided with an end member joined to an outer end portion of the lower cross member in the vehicle width direction,
The vehicle lower portion structure, wherein the end member is joined to the side sill and the side member.
前記サイドメンバは、車両前後の位置に設けられるフロントサイドメンバおよびリヤサイドメンバを有し、
前記端部材は、車両前方側が前記フロントサイドメンバに接合され、前記端部材の車両後方側に、前記サイドシルに接合される後壁を有していることを特徴とする請求項1に記載の車両下部構造。
The side members have a front side member and a rear side member provided at positions in the front and rear of the vehicle,
2. The vehicle according to claim 1, wherein the end member has a vehicle front side joined to the front side member, and has a rear wall joined to the side sill on the vehicle rear side of the end member. undercarriage.
前記端部材と前記リヤサイドメンバとは、前記後壁と前記リヤサイドメンバとが重なり合った状態で、接合されていることを特徴とする請求項2に記載の車両下部構造。 3. The vehicle lower structure according to claim 2, wherein the end member and the rear side member are joined together with the rear wall and the rear side member overlapping each other. 前記後壁は、前記下側クロスメンバの車両後部側に位置する後側段差壁で接合される後側接合部を有しており、
前記後側段差壁は、前記フロアパネルの車両幅方向内側に位置する平坦なフロア中央面部まで延びていることを特徴とする請求項2または3に記載の車両下部構造。
the rear wall has a rear joint portion joined by a rear stepped wall positioned on the vehicle rear side of the lower cross member;
4. The vehicle lower structure according to claim 2, wherein the rear stepped wall extends to a flat floor center surface portion positioned inside the vehicle width direction of the floor panel.
前記下側クロスメンバは、前記フロントサイドメンバよりも車両上方に配置され、
前記下側クロスメンバと前記フロントサイドメンバとが接合される前記フロアパネルの境界部分には、前記フロントサイドメンバから車両内側へ向かって上り傾斜するフロア傾斜面部が設けられ、
前記端部材は、前記下側クロスメンバに向かって延出する延出部を有し、該延出部は、前記フロア傾斜面部の位置で前記下側クロスメンバと接合していることを特徴とする請求項2に記載の車両下部構造。
The lower cross member is arranged above the front side member in the vehicle,
A boundary portion of the floor panel where the lower cross member and the front side member are joined is provided with a floor inclined surface portion that slopes upward from the front side member toward the inside of the vehicle,
The end member has an extension portion extending toward the lower cross member, and the extension portion is joined to the lower cross member at the position of the floor inclined surface portion. The vehicle undercarriage according to claim 2.
前記フロア傾斜面部に位置する前記延出部は、車両外側に向かうほど車両下側に勾配する勾配部分を有し、該勾配部分は、前記フロントサイドメンバまたは前記リヤサイドメンバまで連続して形成されていることを特徴とする請求項5に記載の車両下部構造。 The extending portion positioned on the floor slope portion has a sloped portion that slopes downward toward the vehicle outer side, and the sloped portion is formed continuously to the front side member or the rear side member. 6. The vehicle undercarriage according to claim 5, wherein: 前記フロアパネルの下方には電源部材が設けられ、該電源部材は、車両側方視で前記サイドシルと重なり合うように配置されているとともに、車両幅方向に延びるクロスメンバによって支持され、
前記リヤサイドメンバには、前記クロスメンバを接合するクロスメンバ接合部が設けられ、該クロスメンバ接合部は、車両下方視で前記サイドシルの車両前後方向の範囲に配置されていることを特徴とする請求項2から6のいずれか一項に記載の車両下部構造。
A power supply member is provided below the floor panel, the power supply member is arranged so as to overlap the side sill when viewed from the side of the vehicle, and is supported by a cross member extending in the width direction of the vehicle,
The rear side member is provided with a cross member joint portion that joins the cross member, and the cross member joint portion is arranged in a range of the side sill in the longitudinal direction of the vehicle when viewed from below the vehicle. Item 7. The vehicle lower structure according to any one of Items 2 to 6.
前記リヤサイドメンバは、車両下方に位置する下面部と、車両幅方向に位置する側面部を有し、
前記クロスメンバ接合部には、クロスメンバ接合部ブラケットが設けられ、該クロスメンバ接合部ブラケットは、前記リヤサイドメンバの下面部及び側面部に接合されていることを特徴とする請求項7に記載の車両下部構造。
The rear side member has a lower surface portion located below the vehicle and a side surface portion located in the vehicle width direction,
8. The set forth in claim 7, wherein the cross member joint is provided with a cross member joint bracket, and the cross member joint bracket is joined to the bottom surface and the side surface of the rear side member. Vehicle undercarriage.
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