Sieve arrangement for use in agricultural combine harvester, has drive including mass oscillator, where direction of oscillation of mass oscillator is adjusted around vertical axis and/or frequency of mass oscillator is adjusted

摘要

The arrangement (48) has sieves (50, 52) provided with openings. A drive (70) stays in an operative connection with the sieves. The sieves are moved by the drive. The drive has a mass oscillator, where a direction of the oscillation of the mass oscillator is adjusted around a vertical axis and/or the frequency of the mass oscillator is adjusted. The mass oscillator has a mass that is attached to a rotationally driven shaft. The mass oscillator is firmly connected to the sieves and driven by an electric or hydro motor.