To provide a vehicle body understructure capable of preventing a tunnel from being deformed by an impact load input, for example, by a lateral collision.SOLUTION: A vehicle body understructure 10 includes a floor tunnel 14, a first cross member 32, a first reinforcement member 48 and a second reinforcement member 49. The floor tunnel extends in a vehicle body longitudinal direction around the central part of the floor panel 13 in the vehicle width direction. The first cross member extends in the vehicle width direction and is joined to the floor tunnel. The first reinforcement member has a first top part 51 and a first left side part 52 spaced from a tunnel top part 24 and a tunnel side wall 25, respectively. The second reinforcement member is joined to a first top part of the first reinforcement member and joined near a top part 43 of the first cross member.SELECTED DRAWING: Figure 2

    【課題】例えば側面衝突等により入力した衝撃荷重でトンネルが変形することを防止できる車体下部構造を提供する。【解決手段】車体下部構造10は、フロアトンネル14と、第1クロスメンバ32と、第1補強部材48と、第2補強部材49と、を備えている。フロアトンネルは、フロアパネル13の車幅方向中央部付近で車体前後方向に延在されている。第1クロスメンバは、車幅方向に延在され、フロアトンネルに接合されている。第1補強部材は、トンネル頂部24及びトンネル側壁25からそれぞれ離間した第1上部51及び第1左側部52を有する。第2補強部材は、第1補強部材の第1上部に接合され、かつ、第1クロスメンバの頂部43近傍に接合されている。【選択図】図2


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    Title :

    VEHICLE BODY UNDERSTRUCTURE


    Additional title:

    車体下部構造


    Contributors:

    Publication date :

    2021-10-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B62D MOTOR VEHICLES , Motorfahrzeuge



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