Patent ID: 6500064
Filing Date: 2002-12-31
Classification: A01D,Y10S

Abstract:
A chaff distributor for a combine harvester for the distribution of chaff, whereina trough (8) having a conveyor screw (9) drivably supported therein are provided, the conveyor screw (9) comprising a clockwise thread along one side (10) thereof and a counter-clockwise thread (11) along an opposite side thereof, such that the conveyor screw (9), upon rotation, has a clockwise motion on the one side (10) and a counter-clockwise motion on the opposite side (11) thereof, and chaff is transported by the conveyor screw (9) into external regions of the trough (8) outwardly, a chaff separation plate (12) pointing upwardly is provided behind the chaff distributor (6) or the trough (8) such that the chaff separation plate (12) extends upwardly and tangentially from a rear end of the trough (8), the chaff distributor (6) or the trough (8) can be moved backwardly and forwardly in a direction of travel of the combine harvester, such that the chaff separation plate (12) is locatable either in front of the chaff distributor (6) or trough (8), or behind the chaff distributor (6) or the trough (8) in the direction of travel of the combine harvester, additionally comprising a sieve shoe (3) runs in a direction of travel (4) of the combine harvester (1) and slightly inclined from a bottom front end to a top back end thereof, said sieve shoe (3) being arranged such that chaff falling through said sieve shoe (3) is blown backwardly by a cooling wind (5) of the combine harvester (1), said chaff separator plate (12) extending close to a lower side and a rear end of said sieve shoe (3), and in one operative position, said chaff distributor trough (8) being movable to position a front end thereof in a region of said chaff separation plate (12) pointing upwardly such that said chaff separation plate (12) extends upwardly and tangentially from a front end of said trough (8), and long straw of maize falling over the rear end of said sieve shoe (3) is deflected into said chaff distributor trough (8) which distributes the long straw, and when said chaff separator trough (8) is in a forward operative position such that said chaff separator plate (12) extends upwardly and tangentially from the rear end of said trough (8), only chaff and not the long straw is supplied to said chaff distributor (6).