GRAIN CLEANING MACHINE Russian patent published in 2025 - IPC B07B1/52 

FIELD: agriculture.

SUBSTANCE: proposed invention relates to agricultural machine building, in particular to grain cleaning machines with brush cleaning of sieves. Grain cleaning machine comprises a frame, shaker shoes with sieves, movably mounted inside the frame at an angle to the horizon, frame of brushes with device for pressing of brushes to sieves, movably installed on guides of shaker shoes, crank mechanism imparting plane-parallel oscillations to shaker shoes. At that, the brush frames are connected by means of leashes with one of the ends of the double-arm levers, the axes of which are mounted on the grain cleaning machine frame, and the second ends of these two-arm levers are movably connected by means of drivers with shaker shoes, which provides movement of shaker shoes and frames of brushes in opposite directions. Brushes within the brushes are installed with a pitch equal to or less than the span of vibrations of shaker shoes 2R, and the stroke of the sieve frames per one cycle of movement of the shaker shoes is equal to L=2R(1+l_b/l_s). This provides secondary cleaning of part of sieve surface in shaker shoes, at the same time length of sieves secondary cleaned by each brush makes L=2Rl_b/l_s.

EFFECT: higher efficiency of grain cleaning machine.

1 cl, 1 dwg