Suspension subframe structure of vehicle

A suspension subframe structure of a vehicle for supporting a plurality of suspension arms of a multi-link suspension system, comprising:

• first and second lateral members provided in spaced-apart relation to each other in a longitudinal direction of a vehicle body and each extending in a lateral direction of the vehicle body;
• a pair of longitudinal members extending in the longitudinal direction in such a manner that one of the longitudinal member connects respective left ends of the first and second lateral members, and the other longitudinal member connects respective right ends of the first and second lateral members;
• a pair of right and left upper-arm support portions provided in respective ones of the right and left ends of the first lateral member;
• and
• a pair of right and left lower-arm support portions provided in respective ones of the right and left ends of the first lateral member,
• wherein:
• the first lateral member is formed to allow a load to be transmitted diagonally between the left upper-arm support portion and the right lower-arm support portion and diagonally between the left lower-arm support portion and the right upper-arm support portion;
• the right and left upper-arm support portions and the right and left lower-arm support portions are integrally formed in the first lateral member;
• and
• at least one of upper and lower portions of the first lateral member is formed as a downwardly-concaved or upwardly-concaved portion in such a manner that a laterally intermediate portion of the first lateral member has a height dimension less than that of each of the right and left ends thereof.

A suspension subframe structure of a vehicle for supporting a plurality of suspension arms of a multi-link suspension system, comprising:

• first and second lateral members provided in spaced-apart relation to each other in a longitudinal direction of a vehicle body and each extending in a lateral direction of the vehicle body;
• a pair of longitudinal members extending in the longitudinal direction in such a manner that one of the longitudinal member connects respective left ends of the first and second lateral members, and the other longitudinal member connects respective right ends of the first and second lateral members;
• a pair of right and left upper-arm support portions provided in respective ones of the right and left ends of the first lateral member;
• and
• a pair of right and left lower-arm support portions provided in respective ones of the right and left ends of the first lateral member,
• wherein:
• the first lateral member is formed to allow a load to be transmitted diagonally between the left upper-arm support portion and the right lower-arm support portion and diagonally between the left lower-arm support portion and the right upper-arm support portion;
• the right and left upper-arm support portions and the right and left lower-arm support portions are integrally formed in the first lateral member;
• and
• the first lateral member is formed with a pair of openings each having a height dimension which gradually decreases in a direction from an adjacent one of the right and left ends toward a laterally intermediate portion of the first lateral member.