COMBINE HARVESTER CLEANING APPARATUS

摘要

The cleaning apparatus of a combine harvester has an oscillating pan assembly (34)and an oscillating sieve assembly (36,38)The sieve assembly. comprises a pair of superimposed sieves,(36,38) both of which are mounted on the same frame for oscillation in unison and always in the same direction. The pan assembly comprises a clean grain pan (40) and a tailings return pan (42)both mounted on a common frame that is separate from the frame of the sieve assembly so that the pans oscillate separately from the sieves. The sieve and pan assemblies are mounted and drive in such a manner that the feed stroke of each assembly is in the same direction as its direction of conveyance, so as to maximize their ability to deliver materials in the intended direction. The clean grain pan (40), and optionally also the tailing return pan (42), is corrugated along its upper feeding surface with the corrugations inclined forwardly in the conveying direction so as to maximize the feeding action while minimizing retrograde movement of the materials thereon.