GRAIN COMBINE Russian patent published in 2005 - IPC

FIELD: agricultural engineering, in particular, equipment used in cereal and leguminous crop harvesting machines.

SUBSTANCE: grain combine has header with inclined chamber, device for preliminary threshing of grain, threshing unit with cleaning sieves and hoppers for receiving grain from preliminary threshing device and from threshing unit. Preliminary threshing device is mounted between header and inclined chamber and is made in the form of paired upper and lower rolls positioned for rotation in opposite directions. Paired rolls are provided with gap adjusting mechanisms. Each roll of preliminary threshing device is made in the form of hollow shaft with pins and blade extending tangentially to hollow shaft surface. When mechanism for adjustment of gaps between rolls in pairs is in its initial fixed position, blades are extending at right angles with respect to one another.

EFFECT: improved quality of seed material and substantial reduction of power consumed for threshing procedure.

2 cl, 3 dwg