THRESHING DEVICE Russian patent published in 2017 - IPC A01F12/18 A01F12/26 

FIELD: agriculture.

SUBSTANCE: device contains a drum, on the shaft 1 of which there are disks 2 with scourges 3, and a concave with extreme and intermediate shelves. On the concave sides, the front section 7 is fixed with a working surface convex towards the drum, and the rear section 8. The front section 7 is formed by longitudinal bars 9 and transverse bars 10. On the longitudinal arc-shaped lodgements 11 of the rear section 8, transverse bars 12 bent along the length with formation of the upper 14 and lower 13 shelves are fixed. In the rear section 8, the transverse bars 12 are bent at an obtuse angle between the shelves. On the disks 2 of the drum, angled pests 3 are fixed with an angle between the shelves of at least 136°. The ratio of the lower threshing shelf 5 width to the width of the upper reflecting shelf 4 of the angled pest 3 is in the range of 1:(3…5).

EFFECT: reduced grain crushing during threshing and decreased propensity of the concave to sticking.

9 cl, 5 dwg