Tractor-trailer fifth wheel air suspension assembly

摘要

A tractor-trailer fifth wheel suspension assembly which includes a mounting frame adapted to be suitably connected to a tractor body frame and a movable frame for supporting the fifth wheel mounted for parallel vertical movement relative to the mounting frame, and having opposed complementary stabilizing guide members connected to the respective frames to stabilize and limit the relative movement therebetween. In one form of the invention, the movable frame is supported on the mounting frame by a four-point air suspension system to effect relative parallel vertical movement between the respective frames and which function to automatically laterally and longitudinally stabilize the trailer load relative to the tractor when hauling. In another form of the invention, the movable frame is pivotally connected to the mounting frame at one end and adjustably suspended upon a two point air suspension system at the other end and having complementary guide and stop members to limit the relative vertical movement therebetween. Each of the respective embodiments may be rendered adjustable longitudinally relative to the tractor body frame.