The invention discloses a rear suspension
system and a vehicle, and the rear suspension
system comprises a rear suspension body which comprises a rear axle, lower trailing arms and a V-shaped thrust rod, the lower trailing arms are arranged at the two ends of the rear axle, and the V-shaped vertex of the V-shaped thrust rod is connected to the middle of the rear axle; the mounting structure comprises a first cross beam and a first longitudinal beam, first connecting pieces are arranged on the top walls of the two ends of the first cross beam, and second connecting pieces are arranged on the side walls of the two ends of the first cross beam; one end of the lower
trailing arm away from the rear axle is connected to the first connector; the two ends of the V-shaped thrust rod are connected to the corresponding second connecting pieces respectively. By arranging the mounting structure composed of the first cross beam and the first longitudinal beams at the two ends, the lower longitudinal arm is connected with the first connecting piece, the two ends of the V-shaped thrust rod are connected with the second connecting piece, and therefore vertical
impact, lateral force, torque and alternating load borne by the rear suspension body in the running process can be reasonably dispersed;
stress concentration of the connecting part is avoided, and the problems of
metal plate deformation, weld joint
cracking, suspension loosening and the like are solved.