DEVICE FOR CLEANING OF GRAIN WITH SEPARATION BY FRACTIONS Russian patent published in 2010 - IPC A01F12/44 A01D41/12 

FIELD: agriculture.

SUBSTANCE: invention refers to the sphere of agricultural engineering industry. Device for cleaning of grain includes chute board with sieve inbuilt into its medium section. One end of chute board is fixed to body of combine, and other end is communicated with grain screw conveyor. Sieve is arranged in the form of fixed and movable upper and lower perforated sheets tightly pressed to each other. Brush-holding mechanism with a set of brushes is installed under sieve. Pressing of sheets is provided by contact of lower sheet with a set of brushes and with pressing mechanism. Below brush mechanism there are chute planes arranged at the angle to each other and rigidly fixed to form chute with screw for grain wastes installed in it. Over chute board along its whole length there is a frame installed with additional sieve, upper and lower sheets of which and holes in them are identical to sieve installed in medium part of chute board. Under movable lower sheet of additional sieve there is a pressing mechanism, identical to the one installed in medium part of chute board. Lower movable sheets of sieves are connected to adjustment mechanisms to control dimensions of sieve holes.

EFFECT: invention provides for improved extent of grain cleaning.

6 dwg