Swing arm structure for vehicle suspension

摘要

To realize a reduction in weight and an increase in rigidity of a swing arm 45 for supporting an axle of a rear wheel in cooperation with a transmission case suspended from a vehicle body by one of two rear cushions and supporting one end of the axle, the swing arm 45 supporting the other end of the axle and being suspended from the vehicle body by the other rear cushion located symmetrically with the one rear cushion with respect to the laterally central line of the vehicle body. An axle supporting hole 453 is formed at the rear end of a body portion 451 of the swing arm 45. A rear cushion supporting portion 452 is formed on the upper side of the axle supporting hole 453 so as to project upward and outward of the vehicle body. The lower end of the other rear cushion is connected to the upper end of the rear cushion supporting portion 452. The rear cushion supporting portion 452 is integrally formed with a reinforcing rib 4510 extending from the front side of the axle supporting hole 453 along the front edge of the rear cushion supporting portion 452. <IMAGE>