To provide a vehicle body lower part structure that can improve support rigidity of a front portion of a trailing arm by improvement of rigidity of a U-shaped portion without increasing the weight and that can prevent the U-shaped portion from being deformed and opened.SOLUTION: A vehicle body lower part structure includes a pair of left and right rear side frames 20 extending in the vehicle front to back direction, and U-shaped portions 60 each connected to a lower part of each of the rear side frames 20, formed of an outer wall portion 61, an inner wall portion, and a front wall portion, opened to the rear side as viewed from the bottom, and supporting on the inner and outer wall portions with a support pin 51 a front portion of a trailing arm 42 of a rear suspension 40. The U-shaped portion 60 is configured such that the outer wall portion 61 is formed of a side sill inner 9 and the front wall portion and the inner wall portion are formed of a bracket thicker than the side sill inner 9. Bead portions 65, 66, 67 extending toward the rear side frame 20 located above are formed above a trailing arm support portion 9b on the outer wall portion 61.SELECTED DRAWING: Figure 5

    【課題】重量増加を招くことなく、コ字形状部の剛性向上によりトレーリングアーム前部の支持剛性を向上させ、コ字形状部の口開き変形を抑制することができる車両の下部車体構造の提供を目的とする。【解決手段】車両前後方向に延びる左右一対のリヤサイドフレーム20と、リヤサイドフレーム20の下部に接続され外壁部61と内壁部と前壁部とで構成されて下面視で後方が開放され内外両壁部に支持ピン51を介してリヤサスペンション40のトレーリングアーム42前部が支持されるコ字形状部60と、を備え、コ字形状部60は、外壁部61がサイドシルインナ9で形成されると共に、前壁部および内壁部がサイドシルインナ9よりも厚板のブラケットで形成され、外壁部61のトレーリングアーム支持部9b上部に上方のリヤサイドフレーム20に向かって延びるビード部65,66,67が形成されたことを特徴とする。【選択図】図5


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    Title :

    VEHICLE BODY LOWER PART STRUCTURE


    Additional title:

    車両の下部車体構造


    Contributors:

    Publication date :

    2020-12-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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