To provide a vehicle bottom part structure excellent in impact absorbing properties while maintaining favorable operation stability.SOLUTION: A vehicle bottom part structure includes: a center floor cross 20 long in a vehicle width direction; a first side member 34 extending in a vehicle forward direction from the center floor cross 20; and a second side member 38 extending in a vehicle backward direction from the center floor cross 20. The center floor cross 20 includes: a cross upper 22; a cross lower 26 vertically facing the cross upper 22 and forming a closed cross section; and a cross R/F 30 which is a reinforcement member disposed while superimposed on the cross lower 26 in the closed cross section and is joined to the first side member 34 and the second side member 38 together with the cross lower 26 in its vehicle width direction end part. A vehicle width direction outside edge 30E of the cross R/F 30 is located on an inner side in a vehicle width direction than the vehicle width direction outside edge 26E of the cross lower 26.SELECTED DRAWING: Figure 4

    【課題】良好な操縦安定性を維持しつつ、衝撃吸収性に優れた車両底部構造を提供する。【解決手段】車両底部構造は、車幅方向に長尺なセンタフロアクロス20と、前記センタフロアクロス20より車両前方に延びる第一サイドメンバ34と、前記センタフロアクロス20より車両後方に延びる第二サイドメンバ38と、を備え、前記センタフロアクロス20は、クロスアッパ22と、前記クロスアッパ22と上下に向き合って、閉断面を形成するクロスロア26と、前記閉断面内において、前記クロスロア26に重ねて配される補強部材であって、その車幅方向端部において、前記クロスロア26とともに前記第一サイドメンバ34および第二サイドメンバ38に接合されるクロスR/F30と、を有し、前記クロスR/F30の車幅方向外側縁30Eは、前記クロスロア26の車幅方向外側縁26Eより車幅方向内側に位置している。【選択図】図4


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    Title :

    VEHICLE BOTTOM PART STRUCTURE


    Additional title:

    車両底部構造


    Contributors:

    Publication date :

    2023-05-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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