To provide a lower vehicle-body structure of a vehicle which can properly attain sectional-deformation suppression of the cross member in a normal vehicle traveling, vibration suppression of the floor panel by the sectional-deformation suppression, and protection of the battery unit in the vehicle side collision.SOLUTION: A lower vehicle-body structure of a vehicle comprises: a floor tunnel 2 projecting upwardly and extending in a vehicle longitudinal direction at a central position, in a vehicle width direction, of a floor panel 1; a cross member 18 having edge lines x3, x5 extending in the vehicle width direction at a rear end of the floor tunnel 2 and having a closed cross-sectional part 21 interconnecting a pair of right-and-left side sills 5; and a pair of right-and-left battery units 31, 32 positioned below the floor panel 1 and between the side sills 5, and provided on right-and-left sides in the vehicle width direction across the floor tunnel 2, and the cross member 18 has reinforcement parts 41, 42 for reinforcing the edge lines x3, x5 in a range including at least the vehicle width direction position of the battery units 31, 32 and excludes the central position in the vehicle width direction.SELECTED DRAWING: Figure 3

    【課題】通常走行時におけるクロスメンバの断面変形抑制と、当該断面変形抑制によるフロアパネルの振動抑制と、車両側突時におけるバッテリユニットの保護と、を達成する車両の下部車体構造の提供を目的とする。【解決手段】フロアパネル1の車幅方向中央位置において、上方に突出して車両前後方向に延びるフロアトンネル2と、フロアトンネル2の後端で車幅方向に延びる稜線X3,X5を有し、閉断面部21が左右一対のサイドシル5間を連結するクロスメンバ18と、フロアパネル1の下方で、かつ、サイドシル5間に位置し、フロアトンネル2を隔てて車幅方向左右に設けられる左右一対のバッテリユニット31,32と、を備え、クロスメンバ18は、車幅方向において、少なくともバッテリユニット31,32の車幅方向位置を含むと共に車幅方向中央位置を除く範囲の稜線X3,X5を補強する補強部41,42を有することを特徴とする。【選択図】図3


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    Title :

    LOWER VEHICLE-BODY STRUCTURE OF VEHICLE


    Additional title:

    車両の下部車体構造


    Contributors:

    Publication date :

    2023-11-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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