FIELD: agricultural engineering.
SUBSTANCE: threshing unit has beater bar drum embraced with threshing concave including sides and working surface divided into sections. Sides are composed of upper and lower parts. Upper parts of sides consist of separate portions to which portions working surface sections are attached. Upper parts of sides are positioned movably relative to lower parts of sides connected by means of rod and additional ribs. Some portions of side upper parts are equipped with cut having shape conforming to radius of rod cross-section. Radius of threshing concave working surface is equal to total of radius of beater bar drum and arithmetic mean value of gaps at inlet and outlet ends of threshing unit.
EFFECT: decreased time consumed for threshing process, reduced labor intensity for re-equipping of concave working surface, and improved process of threshing various farm crops.
3 dwg
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