Patent ID: 9414546
Filing Date: 2016-08-16
CPC Classification: A01D,A01F

Claim Text:
1. Combine harvester comprising a combine harvester chassis and a cleaning shoe for separating threshed grain from material other than grain, said cleaning shoe comprising at least one sieve and an associated sieve drive assembly, said sieve moveable by said sieve drive assembly to perform a reciprocating sieve movement having a sieving stroke and a sieve throwing angle, wherein the sieve drive assembly comprises: a rotary drive comprising a rotatable output shaft, and a transmission that provides a connection between the rotatable output shaft of the rotary drive and the sieve, wherein the transmission is adapted to transform a rotational movement of the rotatable output shaft into the reciprocating sieve movement of the sieve, the transmission comprising an eccentric device, one or more transmission elements, and a plurality of linkage pivots, wherein the eccentric device has an input that is connected to the rotatable output shaft and an output that is pivotably connected to one of the one or more transmission elements through one of the plurality of linkage pivots, the eccentric device has an eccentricity for inducing movement of the at least one transmission element, and wherein each transmission element is associated with at least two associated linkage pivots, wherein each associated linkage pivot pivotably connects said transmission element with at least one of: another transmission element of the one or more transmission elements, the eccentric device, the sieve and the combine harvester chassis, and wherein the eccentric device is an adjustable eccentric device in which the eccentricity is adjustable in order to adjust at least one of the sieving stroke and the sieve throwing angle, the eccentric device comprising: