Patent ID: 9174677
Filing Date: 2015-11-03
Classification: B62D

Abstract:
1. An automobile subframe in which outer edges, in a vehicle width direction, of a main body part formed from an upper plate and a lower plate superimposed on one another and inner edges, in the vehicle width direction, of a pair of suspension support members disposed on opposite sides, in the vehicle width direction, of the main body part are each joined via a joint part extending in a vehicle body fore-and-aft direction, wherein the joint part comprises a first joint part in which one of the upper plate and the lower plate is directly superimposed on and joined to the associated suspension support member, and a second joint part in which the other of the upper plate and the lower plate is directly superimposed on and joined to the associated suspension support member, wherein at the first and second joint parts, the upper plate and the lower plate are superimposed on the associated suspension support member from a same side as each other and joined to the associated suspension support member by friction-stir welding which is conducted in a same direction as each other, the first joint part and the second joint part extend in the vehicle body fore-and-aft direction without overlapping each other, when the one of the upper plate and the lower plate is superimposed on the associated suspension support member, there are formed a superimposed part at which the one of the upper plate and the lower plate and the associated suspension support member are superimposed on one another and an abutment part at which the one of the upper plate and the lower plate and the associated suspension support member are abutted against each other so as to be flush, when the other of the upper plate and the lower plate is superimposed on the associated suspension support member, there is formed an extended part at which the other of the upper plate and the lower plate is extended to a position outwardly of the abutment part in the vehicle width direction, and the first joint part is formed at the superimposed part and the second joint part is formed at the extended part.