COMBINE HARVESTER Russian patent published in 2011 - IPC A01D41/00 A01F7/06 A01F12/18 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machine building. The combine harvester comprises a harvester, an inclined chamber, a threshing-separation device and an air blower. A threshing-separation device is arranged in the form of external, medium and internal helical drums coaxially arranged with a gap. The external drum is made along perimeter from three or more perforated strips of alternating width, which are coiled in vertical plane and are serially connected to each other. The middle drum is mounted from sections made of even number of equilateral triangles connected to each other by lateral sides. Sections are connected to each other by free third sides of triangles to form a helical drum. Along perimeter of the helical drum, there are broken right and left helical lines arranged opposite to each other with internal helical grooves. The inner drum of the combine harvester is arranged in the form of a multiple helical perforated surface with helical grooves inside and outside of the drum at the angle of 5°-30° to its axis of rotation.

EFFECT: efficiency of combine threshing and separation device increases due to increased area of sifting in the inner drum.

27 dwg