To provide a vehicle body understructure capable of reducing restriction of layout of a component, even when providing a joint flange part on a vehicle body skeleton member on the lateral side of a floor panel.SOLUTION: A rear side member 30 includes a joint flange part 50 using a vehicle vertical direction as a thickness direction, which is a part projecting to the vehicle width direction inside furthermore than a vehicle width direction inside surface 38X of an inside vertical wall part 38 in a skeleton body part 32. Further, in the skeleton body part 32, a recess 48 recessed from the vehicle width direction inside surface 38X of the inside vertical wall part 38 to the vehicle width direction outside is formed. The recess 48 includes a second surface 48B which is a surface continuous on the same plane to a joint area 50A of the joint flange part 50.SELECTED DRAWING: Figure 2

    【課題】フロアパネルの側方側の車体骨格部材に接合フランジ部を設けても部品のレイアウト上の制約を小さくすることができる車体下部構造を得る。【解決手段】リヤサイドメンバ30は、骨格本体部32における内側縦壁部38の車両幅方向内側面38Xよりも車両幅方向内側に張り出す部分であって車両上下方向を厚み方向とする接合フランジ部50を備える。また、骨格本体部32には、内側縦壁部38の車両幅方向内側面38Xから車両幅方向外側に凹む凹部48が形成されている。この凹部48は、接合フランジ部50の接合面50Aと同一平面上で連続する面である第二面48Bを備える。【選択図】図2


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    Title :

    VEHICLE BODY UNDERSTRUCTURE


    Additional title:

    車体下部構造


    Contributors:

    Publication date :

    2021-01-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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