To provide a vehicle bottom structure that can improve the cross-sectional proof strength of a Ctr cross member while maintaining the small cross-sectional area of the Ctr cross member.SOLUTION: A vehicle bottom structure includes: a Fr floor panel 20 that forms the floor surface of a vehicle interior; a Ctr floor panel 22 located at the rear side of a vehicle and at the upper side thereof relative to the Fr floor panel 20; and a Ctr cross member 24 which is present between the Fr floor panel 20 and the Ctr floor panel 22 and which extends in the vehicle widthwise direction. The Ctr cross member 24 includes: a front wall 50; a rear wall 52 located backwardly relative to the front wall 50; a ceiling wall 36 that couples respective upper ends of the front wall 50 and the rear wall 52 with each other; and a bottom wall 46 that couples respective lower ends of the front wall 50 and the rear wall 52 with each other. The rear wall 52 of the Ctr cross member 24 includes both an upper rear wall 38 that extends upwardly from the Ctr floor panel 22 and a lower rear wall 48 that extends downwardly therefrom.SELECTED DRAWING: Figure 2

    【課題】Ctrクロスメンバの断面積を小さく抑えつつも、Ctrクロスメンバの断面耐力を向上できる車両底部構造を提供する。【解決手段】車室の床面を構成するFrフロアパネル20と、前記Frフロアパネル20より車両後方かつ車両上方に位置するCtrフロアパネル22と、前記Frフロアパネル20と前記Ctrフロアパネル22との間に介在し、車幅方向に延びるCtrクロスメンバ24と、を備え、前記Ctrクロスメンバ24は、前壁50と、前記前壁50の後方に位置する後壁52と、前壁50および後壁52の上端同士を連結する天壁36と、前壁50および後壁52の下端同士を連結する底壁46と、を有しており、前記Ctrクロスメンバ24の後壁52は、前記Ctrフロアパネル22より上方に延びる上後壁38と下方に延びる下後壁48の双方を有する、ことを特徴とする。【選択図】図2


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    Title :

    VEHICLE BOTTOM STRUCTURE


    Additional title:

    車両底部構造


    Contributors:
    ITO KEITA (author)

    Publication date :

    2023-09-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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