THRESHING UNIT Russian patent published in 2003 - IPC

FIELD: agricultural engineering. SUBSTANCE: threshing unit has rasp bar threshing drum and grid-type concave. Threshing drum has disks with rasps and members arranged under rasps. Grain catching troughs are positioned in internal cavity of threshing drum under each rasp at an angle to drum central axis. Grain catching troughs are made double-sectioned and are inclined to drum ends and away from its central axis. Screens are extending longitudinally of each trough. Separating rasps positioned on outer side of outer disks are adapted for cooperation with additional separating parts of concave. EFFECT: increased efficiency in grain separation and reduced impact action of drum rasps upon grain. 4 cl, 3 dwg