The embodiments herein provide a centrifugal scattering device having a central axle, a sieve positioned below the central axle, a plurality of rotors, each one having a proximal end and distal end where the proximal end of each rotor is attached to the central axle. The device also preferably includes a guide, angled relative to the central axle and attached to the distal end of each rotor so that the guide travels around the central axle and along the sieve when the central axle rotates.

A combine harvester is provided with a conveyance system for transporting crop material discharged by overhead grain separating apparatus to a grain cleaning shoe. The conveyance system comprises a series of oscillating pans which move the grain in a generally longitudinal direction. A return pan conveys the collected material forwardly to a front discharge edge from where the material falls onto a stratification pan below. The stratification pan conveys the collected material rearwardly to a rear discharge edge from where the material falls into the grain cleaning shoe. At least one of the return pan and the stratification pan is non-rectangular and has a non-transverse discharge edge.

An adjustable vane system for use with a rotor cage of a threshing system of an agricultural harvester includes a vane. The vane includes: a generally helically curved inner profile; a surface being an outer profile that is opposite the inner profile and is generally helically curved over a portion of the vane, the outer profile being configured to be positioned closer to the rotor cage than the inner profile; and a flat portion located midway along the outer profile.

A residue deflector is disposed in a combine body, and positioned along an airflow path to guide residue from an exit end of a cleaning shoe and a threshing and separation assembly, to a residue chopper. The deflector is configured with a plurality of spaced fingers so that air can pass through the deflector between the fingers.

A shaker table with air flow openings and airflow to preprocess the crop before it fully enters the separating and cleaning system of the harvester through a means of corrugation platforms with air flow directed from below to break up the material into a more easily cleaned condition.

A sieve for a cleaning system of an agricultural harvester includes: a sieve frame defining a top side; adjustable louvers carried by the sieve frame and defining apertures; an adjustment bar coupled to the adjustable louvers such that displacement of the adjustment bar changes a size of at least some of the apertures; and an adjustment assembly. The adjustment assembly includes: an adjustment arm coupled to the adjustment bar and pivotable relative to the sieve frame such that pivoting of the adjustment arm about a pivot axis displaces the adjustment bar. The adjustment arm carries a locking pin. A shaft is disposed on the top side and coupled to the adjustment arm. Displacement of the shaft from a first position to a second position causes a corresponding displacement of the locking pin from a locking position to an adjustment position.

A cleaning assembly for a combine harvester including a vibrating floor conveyor for conveying crops. The vibrating floor conveyor is moved into a vibrating movement and is supported at the conveyors downstream end by hangers on a cleaning shoe. At least one sieve is arranged in the cleaning shoe that can be moved into a vibrating movement, and which can be exposed to an air flow by a blower. A rotatable transverse auger conveyor is arranged downstream of the vibrating floor conveyor and upstream of the sieve for lateral conveying of the crop and includes a shaft and conveying coils attached to the shaft, wherein the hangers are supported on the shaft of the transverse screw conveyor.

A harvesting combine has a forward power processing unit (PPU) powered by an internal combustion engine, a rear grain cart for storage of harvested grain, a forward operator cab, a cleaning fan assembly located about the forward bottom of the PPU, and rotor and concaves assembly for threshing grain. The harvesting combine is improved by locating a charge fan assembly behind the forward operator cab and drawing air from about the top of the PPU and directing a portion of an air flow from the charge fan assembly downwardly into the cleaning fan assembly.

A concave for an agricultural combine includes threshing beds carried by a base frame and forming openings therebetween for grain to pass through. Each threshing bed includes a first end, a second end, a length from the first end to the second end, an inner extremity, an outer extremity, and a separating grate extending across one of the openings for separating grain from threshed crop material. The separating grate extends along the length between the first end and the second end, is between the inner extremity and the outer extremity and includes grate openings and spaced-apart bars. The bars are between adjacent grate openings and include struts each connecting two adjacent parts of the separating grate between adjacent grate openings and severed bars each including bar segments extending inwardly toward one another to respective free ends on either side of a gap between adjacent grate openings.

A combine harvester may include a chaffer to separate residue from grain in crop material, a fan to direct air through and across the chaffer to carry the residue from the harvester, a sensor to output signals indicating a characteristic of the crop material upstream of the chaffer and a controller to adjust a speed of the fan based on signals from the sensor.