To provide a lower vehicle body structure of a vehicle, capable of achieving both support rigidity of a seat bracket, and impact absorption performance of a cross member.SOLUTION: A lower vehicle body structure of a vehicle comprises: a pair of side sills 1; a floor panel 2; a pair of floor frames 3 extending forward and backward at the lower side of the floor panel 2; a battery unit 4 arranged between the pair of floor frames 3; a first cross member 5 connecting the pair of side sills 1 at the upper side of the floor panel 2; and a seat bracket 7 disposed in an outer end part in a vehicle width direction of the first cross member 5. The seat bracket 7 partially covers an upper wall part 32c of a first side part 32, and has a swollen part 7e separated upward from the upper wall part 32c of the first cross member 5. The upper wall part 32c of the first cross member part corresponding to the swollen part 7e is formed with bead parts 32s, 32t and an opening 32u so that rigidness becomes low compared to an upper surface part excluding the first cross member part.SELECTED DRAWING: Figure 5

    【課題】シートブラケットの支持剛性とクロスメンバの衝撃吸収性能とを両立することができる車両の下部車体構造を提供する。【解決手段】1対のサイドシル1と、フロアパネル2と、フロアパネル2の下側で前後に延びる1対のフロアフレーム3と、1対のフロアフレーム3の間に配設されたバッテリユニット4と、フロアパネル2の上側で1対のサイドシル1間を連結する第1クロスメンバ5と、第1クロスメンバ5の車幅方向外側端部に設けられたシートブラケット7とを備え、シートブラケット7が、第1側部32の上壁部32cを部分的に覆うと共に第1クロスメンバ5の上壁部32cから上方に離隔した膨出部7eを有し、膨出部7eに対応した第1クロスメンバ部分の上壁部32cに第1クロスメンバ部分以外の上面部に比べて剛性が低くなるようビード部32s,32t及び開口部32uを形成している。【選択図】 図5


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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 :

    2020-09-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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