Cleaning sieve for the harvested crop of agricultural machines

摘要

A cleaning sieve assembly disposed at the end of and below a transporting conveyor of the harvested crop in the harvesting machine includes an upper or shaff sieve and a lower sieve both subjected to an air current blown from a blower. The upper sieve includes a plurality of inclined sieve zones, which may be descending or ascending in respect to the plane of the sieve with the inclination which is adjustable.