To provide a vehicle body substructure capable of suppressing an adverse effect on collision performance despite a frame has a fragile part for attaching a chassis component.SOLUTION: An opening 31 for avoiding a trailing arm 50 is formed in a frame bottom wall 15 of a rear frame 10. The rear frame 10 includes a first reinforcement member 61 that extends in a vehicular fore-and-aft direction by the side of the opening 31 and reinforces the surrounding of the opening 31. A reinforcement vertical wall 62 of the first reinforcement member 61 is segmented into a forward vertical wall 62a and a backward vertical wall 62b. The forward vertical wall 62a and the backward vertical wall 62b are coupled to a pair of frame lateral walls 11 and 12 directly or via a partition member 41 of the rear frame 10. A nut member 35 fixed to the rear frame 10 is located at a position opposite to the opening 31 in a region between the forward vertical wall 62a and the backward vertical wall 62b.SELECTED DRAWING: Figure 6

    【課題】フレーム部にシャシ部品を取り付けるための脆弱部があっても、衝突性能への影響を抑えることができる車体下部構造を提供する。【解決手段】リヤフレーム10のフレーム底壁15には、トレーリングアーム50を避けるための開口部31が設けられるとともに、リヤフレーム10は、開口部31の側方で車体前後方向に延在し、開口部31の周囲を補強する第一補強部材61を備え、第一補強部材61の補強縦壁62は、前側縦壁62aと後側縦壁62bとに区分され、前側縦壁62aおよび後側縦壁62bは、一対のフレーム側壁11,12の各々に直接またはリヤフレーム10の隔壁部材41を介して連結され、前側縦壁62aおよび後側縦壁62bの間の部位に対して開口部31と反対側の位置には、リヤフレーム10に固定されたナット部材35が配置されている。【選択図】図6


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    Title :

    VEHICLE BODY SUBSTRUCTURE


    Additional title:

    車体下部構造


    Contributors:

    Publication date :

    2022-05-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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