Patent ID: 7530585

Claim:
A rear suspension structure for a vehicle, comprising: a plurality of left air springs being disposed in front and behind an axle housing in a left side of the axle housing and a plurality of right air springs being disposed in front and behind the axle housing in a right side of the axle housing in a longitudinal direction of the vehicle, wherein one end of each left air spring is coupled to a left rear axle support beam positioned below the axle housing and one end of each right air spring is coupled to a right rear axle support beam below the axle housing, each left and right air spring comprising: an air chamber; and a piston sealing a lower end of the air chamber; leveling valves, one of which being connected with the left air springs and another of which being connected with the right air springs, wherein the leveling valve of the left springs being arranged on a plane connecting vertical center axes of the left air springs and the leveling valve of the right air springs being arranged on a plane connecting vertical center axes of the right air springs; a pair of bump stoppers respectively attached to rear body side frames directly above the axle housing at a predetermined distance, wherein the rear body side frames are aligned in the longitudinal direction of the vehicle and the axle housing is positioned between the rear body side frames; a lower radius rod respectively coupled at a first end thereof to one of the left or right rear axle support beams by a bushing pipe passing vertically through the lower radius rod and coupled at a second end thereof to a rear end lower cross member by a member bracket and a bushing pipe passing horizontally through the lower radius rod, wherein the other ends of at least one of the left air springs and at least one of the right air springs are attached to a rear center cross member by an upper plate, the other ends of at least one of the left air springs and at least one of the right air springs are attached to the rear end upper cross member by an upper plate, and the pistons of the left and right air springs are respectively attached to opposite ends of the left and right rear axle support beams by a lower plate, and wherein the rear center cross member is positioned above the axle housing, and transversally attached to the rear body side frames, and the rear end upper cross member is positioned above the axle housing and transversally attached to the rear body side frames.