Researches on the Hydraulic Systems of Actioning the Suspension Mechanisms at Tractors

Abstract

SUMMARY The agricultural machines are coupled to tractor th rough the suspension mechanism in three points. The actioning of the suspension mechanisms is made by some hydraulic systems, which have the following component parts: tank, pu mp, distributer, valves, hydraulic cylinders, filters and hydraulic prizes. These systems must assure, between others, lifting in a convenient time of the carried machine from the work position to that of transport position, to allow the maintaining of the machine in any intermediary position, between the l owest limited position and the upper limited position and to assure the posibility to th e carried machine to follow the irregularities of the ground during work and finally, to assure th e maintaining of the work parameters in different work conditions. The hydraulic systems used for actioning the suspen sion mechanisms in three points can be: simple systems of lifting and descenting, s ystems of adjusting and descenting systems with automatic adjustment. This paper reffers to simple lifting and descentin g systems. Thus, 2 schemes are presented of 2 simple lifting and descenting syste ms with suspending mechanisms.