| 摘要 |
PROBLEM TO BE SOLVED: To form a side member of a front sub-frame with lightweight and high-rigidity, and to effectively bear a lateral force and the like, which are input into the front sub-frame from a suspension arm during traveling of a vehicle, by a simple configuration.SOLUTION: A front sub-frame structure includes a pair of right and left arm supporting parts 18 for supporting a suspension arm 4, a pair of side members 7 which are elongated in a longitudinal direction of a vehicle, and a cross member 11 which is elongated in a vehicle-width direction to connect the right and left arm supporting parts 18. The side member 7 is split into a front part 13 of the side member, which assumes a closed cross-section shape positioned on a front side with respect to the arm supporting parts 18, and a rear part 14 of the side member, which assumes a closed cross-section shape positioned on a rear side with respect to the arm supporting parts 18. The arm supporting parts 18 and the cross member 11 are connected to each other via a closed cross-section structure 17 which forms a closed cross-section elongated in the vehicle-width direction. |
