GRAIN CLEANER Russian patent published in 2023 - IPC B07B1/52 A01F12/44 

FIELD: agricultural engineering; grain cleaning machines.

SUBSTANCE: agricultural engineering, in particular grain cleaning machines with brush cleaning sieves. Grain cleaning machine contains a frame, sieve stands with sieves movably mounted inside the frame at an angle to the horizon, brush frames with a device for pressing brushes against the sieves, movably mounted on the guides of the sieve stands, a crank mechanism transmitting plane-parallel vibrations to the sieve stands. At the same time, the frames of the brushes are movably connected by means of leashes to one of the ends of the two-arm levers, the axes of which are mounted on the frame of the grain cleaning machine, and the second ends of these two-arm levers are movably connected by means of leashes to sieve stands, which ensures the movement of sieve stands and brush frames in opposite directions, due to which the number of brushes in the brush part is significantly reduced. The brushes in the brush part are installed with a step equal to the oscillation range of the sieve mills 2R plus the ratio of the length of the part of the two-arm levers connected by leashes to the brush frames l_b, to the second part of these two-arm levers, which are connected by means of leashes with sieve stands l_s, multiplied by the range of vibrations of the sieve mill 2R. The leashes are adjustable in length.

EFFECT: increase in productivity of grain cleaning machines and a reduction in energy costs.

2 cl, 1 dwg