Patent ID: 6322090
Filing Date: 2001-11-27
Classification: B60B,B60G

Abstract:
A suspension system with an oscillating, rigid axle, for tractors wherein the axle ha longitudinal axis and is supported on a sub-frame having articulated arms which in turn is mounted for oscillation about an axis of oscillation on a load bearing structure adapted to be mounted on the tractor, suspension means for moving the axle toward and away from the load bearing structure being interposed between the axle and the load bearing structure, wherein the sub-frame comprises at least two pairs of first arms and second arms each having opposed first and second ends, the first arms of each pair being articulated to the axle by respective first ends, and to the respective first ends of the second arms by respective second ends, the second arms being articulated to the load bearing structure by their respective second ends, the pairs of arms being arranged so as to form a four sided kinematic linkage, and wherein the suspension means comprise linear guide means for restraining and guiding the axle along an axis substantially perpendicular to said longitudinal axis of the axle during movement of the axle toward and away from said axis of oscillation.