Subframe support structure having function of collision energy dispersion and function of subframe anti-transformation

摘要

PURPOSE: A sub frame supporting structure having sub frame move-back preventing and collision energy dispersing functions is provided to minimize injuries of legs of a driver by minimizing the moving back of a front cross member and the sub frame in a collision, to absorb the collision energy for the first time by structural deformation by dividing collision load to the sub frame and a front side member, and to minimize the severe deformation of a side member and a dash panel by dispersing load transmitted from the front side member to a center side member, from the front side member to a side sill, and from the front side member and the sub frame to a support sub frame in three directions. CONSTITUTION: In an under body frame structure for positioning a front mounting part(1) of a sub frame(10) to a front side member(2) and mounting a rear mounting part(3) to a front cross member(5) at the lower end of a dash panel(4), a sub frame supporting structure having sub frame move-back preventing and collision energy dispersing functions mounts both ends of a pair of integrated support sub frames(20) with the front cross member and a first cross member(6) by welding and disposes both sides of the support sub frame to a side member(7) and a floor(8).