PROBLEM TO BE SOLVED: To provide a lower vehicle body structure of an automobile which is achieved in weight reduction, is set at a reverse phase at the mouth-opening deformation of a tunnel fore-and-aft part by the integration of cross members, acts so that the vibration of the reverse phase deforms a seat rail which is rigid-body connected to a seat rail attachment seat, suppresses the vibration by the seat rail having high rigidity, is light in weight and high in rigidity, and can enhance quietness.SOLUTION: One piece of a cross member 35 extending to a vehicle width direction is laid between a side sill 18 in the vicinity of an intermediate pillar 26 and a tunnel part 11, seat rail attachment parts 41, 42 are arranged at least at a lower part of the tunnel part 11 in a position which is separated from the cross member 35 to a fore-and-aft direction, and a bottom face of the seat rail 50 is rigid-body connected to the seat rail attachment parts 41, 42.SELECTED DRAWING: Figure 1
【課題】クロスメンバの一本化により、軽量化とトンネル部前後の口開き変形の逆相化を図り、この逆相の振動がシートレール取付け座に剛体結合したシートレールを変形させるように働き、剛性が高いシートレールで斯る振動を抑制し、軽量かつ高剛性で静粛性を高めることができる自動車の下部車体構造の提供を目的とする。【解決手段】中間ピラー26近傍のサイドシル18とトンネル部11との間に、車幅方向に延びる1本のクロスメンバ35を架設し、クロスメンバ35から前後方向に離間した位置においてトンネル部11の少なくとも下部にシートレール取付け座41,42を設け、シートレール取付け座41,42にシートレール50の底面を剛体結合したことを特徴とする。【選択図】図1
LOWER VEHICLE BODY STRUCTURE OF AUTOMOBILE
自動車の下部車体構造
2016-06-20
Patent
Electronic Resource
Japanese