A grain separating apparatus (1) for a combine harvester (2). The grain separating apparatus (1) has at least a first walker-sieve (3) and a second walker-sieve (4) arranged side by side, wherein the first walker-sieve (3) and the second walker-sieve (4) are suspended in at least two suspension points (5,6) in the combine harvester (2) and wherein at least one of the two suspension points (5,6) is arranged to describe a rotational motion. A rotational motion drive (7) is arranged to drive the rotational motion of the first walker-sieve (3) out of phase with the rotational motion of the second walker-sieve (4), wherein each of the at least two walker-sieves (3,4) include a straw walker (8) comprising drivers (9) for conveying a straw material (10) and wherein grain (11) and debris (12) are separated from the straw material (10) through walker apertures (13) arranged in the straw walker (8). Furthermore, the straw walker (8) is arranged on top of at least one sieve (14,15) which is arranged to separate grain (11) from the debris (12) and wherein the straw walker (8) and the at least one sieve (14,15) are rigidly connected. Furthermore, a method for separating grain (11) from straw material (10) in a combine harvester (2) by a grain separating apparatus (1) as described above.

A sensor assembly for attachment underneath a screen of a combine harvester is provided with a plurality of sensor units having sensor elements, a plurality of which sensor units are arranged one behind the other within a hollow profile which extends in the longitudinal direction of the screen.

A combine harvester grain cleaner. The grain cleaner includes an upper, relatively moveable framework supporting one or more grain sieves, one or more sources of drive for causing reciprocating movement of the one or more grain sieves, a lower, relatively fixed framework supporting one or more grain or tailings sheets, and a vibrator connected to the one or more grain and tailings sheets for causing a vibratory motion thereof and for, through the vibratory motion, causing movement of grain thereon in a predetermined direction. The vibratory motion has a higher frequency than a frequency of the reciprocation of the one or more grain sieves.

A louver position sensing system for a sieve and chaffer of a combine harvester. The system provides that at least one sensor is in actual, physical contact with one or more louvers of the sieve and chaffer. More than one sensor can be utilized where multiple sensors are connected to multiple louvers of the sieve. The directly coupled sensing of the rotational position of the louver(s) allows for accurate, on-the-fly adjustment of the louvers in order to maximize the efficiency of operation of the sieve and chaffer. Preferably, the sensing system is configured such that sensed position of the louvers is broadcast on the bus of the combine harvester. As a result, the position information can be used to dynamically adjust the openings between the louvers of the sieve and chaffer to achieve more efficient grain cleaning as the machine and field variables change.

A harvesting apparatus for harvesting cereal grains, rice, grains or seeds, is operated as a front, side or rear attachment and has a crop stripper extending over a working width which is generating a rotor air stream, an inclined chute having a first edge facing the crop stripper and a second edge facing away from the crop stripper. The second edge is disposed to lie lower than the first edge facing the crop stripper and is attached between a threshing apparatus and a separation apparatus which extend over the predominant or the entire part of the working width. The harvesting apparatus has a cleaning air channel, wherein air from a fan and the crop stripper rotor air stream flow through the cleaning air channel for cleaning the crop. The cleaning air channel extends over the predominant part or the entirety of the working width.

A harvesting apparatus for harvesting cereal grains, rice, grains or seeds, is operated as a front, side or rear attachment and has a crop stripper extending over a working width which is generating a rotor air stream, an inclined chute having a first edge facing the crop stripper and a second edge facing away from the crop stripper. The second edge is disposed to lie lower than the first edge facing the crop stripper and is attached between a threshing apparatus and a separation apparatus which extend over the predominant or the entire part of the working width. The harvesting apparatus has a cleaning air channel, wherein air from a fan and the crop stripper rotor air stream flow through the cleaning air channel for cleaning the crop. The cleaning air channel extends over the predominant part or the entirety of the working width.

A combine includes a sorter 2B including a sieve case 23 drivable to swing; a first chaff sieve 27 held by the sieve case 23 and configured to receive a processing target falling through a receiver net 8 and sort the processing target; a second chaff sieve 28 held by the sieve case 23 in such a manner as to coincide with the first chaff sieve 27 in the front-back direction relative to the sorter 2B and configured to receive a processing target falling through the first chaff sieve 27 and sort the processing target; and a winnowing fan 29 configured to blow sorting air along the first and second chaff sieves 27 and 28.

A combine includes a sorter 2B including a sieve case 23 drivable to swing; a first chaff sieve 27 held by the sieve case 23 and configured to receive a processing target falling through a receiver net 8 and sort the processing target; a second chaff sieve 28 held by the sieve case 23 in such a manner as to coincide with the first chaff sieve 27 in the front-back direction relative to the sorter 2B and configured to receive a processing target falling through the first chaff sieve 27 and sort the processing target; and a winnowing fan 29 configured to blow sorting air along the first and second chaff sieves 27 and 28.

An agricultural harvester includes a grain processing section having a sieve. The sieve is driven in fore and aft oscillation while permitting side to side movement by a pair of cast members interconnected each having three mounting points. Two of the mounting points of the members are interconnected by flexible rubber bushings and the third mounting point of one of the members receives fore and aft oscillating movement and the third mounting point on the second of the members pivotally interconnects to the sieve to drive it into fore and aft oscillation while permitting side to side movement.

An agricultural harvester includes a straw walker arrangement positioned downstream from a threshing and separating system. The straw walker arrangement includes a first straw walker positioned to receive crop material from the threshing and separating system, a second straw walker positioned downstream from the first straw walker, and a rotatable drum positioned between the first straw walker and the second straw walker. The rotatable drum is operable to convey crop material from the first straw walker to the second straw walker.