SUBFRAME STRUCTURE

摘要

A subframe structure for a front of the vehicle includes a front subframe made of steel and a rear subframe made of a light metal. The front subframe comprises left and right side members extending in approximately parallel with each other and including flange sections, the rear subframe comprises left and right rear side sections including flange sections, and a rear cross section connecting the left and right rear side sections. The left and right rear side sections are stacked on the left and right side members, and the flange section are joined together so as to define left and right closed sections, therebetween, and the left and right side members are further fastened to the left and right rear side sections by bolts extending through the left and right closed sections.

主权项

1. A subframe structure for being disposed at a front of the vehicle and fixed to or floatably supported by a vehicle-body member, the subframe structure comprising:
a front subframe made of steel and a rear subframe made of a light metal in which the subframe structure is divided in a front-rear direction of the vehicle, wherein: the front subframe comprises a pair of left and right side members extending in approximately parallel with each other, the rear subframe comprises a pair of left and right rear side sections; and a rear cross section connecting the left and right rear side sections, the left and right side members include extension sections extending rearwardly of the vehicle, respectively, the left and right side members include first left and right flange sections, respectively, the left and right rear side sections include second left and right flange sections, respectively, the left and right rear side sections are stacked on the left and right side members, respectively, a first left flange section and a second left flange section are joined together, a first right flange section and a second right flange section are joined together, a left side member and a left side section define a left closed section therebetween, a right side member and a right side section define a right closed section therebetween, and the front subframe has bolt-through holes formed on left and right side member sides, and the left and right side members are fastened to the left and right rear side sections by bolts extending through the left closed section and the right closed section, respectively.