A threshing bar includes a threshing fixture formed entirely of a first metal, and a head formed entirely of a second metal. The threshing fixture includes a leading extremity, a trailing extremity, a top threshing side, a bottom threshing drum emplacement side, and a spike. The spike projects from the top threshing side to the head affixed rigidly to the spike and which is available for threshing crop cuttings between the leading and trailing extremities. The first metal has a first tensile strength, the second metal has a second tensile strength, and the second tensile strength is greater than the first tensile strength.

A crop processing assembly includes a tube-shaped cage structure and a threshing and separation rotor mounted in the cage structure. The cage structure includes one or more curved gratings at the bottom and a cover at the top, so that the rotation of the rotor actuates the movement of crops along a helicoidal path through the gap between the rotor and the cover and gratings. Inclined guide vanes are arranged on the inner surface of the cover to provide guidance to the crops. The cover includes a step between an upstream portion of the cover and a downstream portion of the cover, so that the gap between the rotor and the cover is larger in the downstream portion than in the upstream portion. The step is oriented at an oblique inclination angle, when the cover is regarded in a parallel projection view from a position above the step.

A threshing and separating system for an agricultural harvester includes: a rotor; a rotor cage at least partially enclosing the rotor, the rotor cage including a first flat wall, a second flat wall connected to and angled with respect to the first flat wall, and a curved wall connected to the second flat wall; and at least one vane connected to the first flat wall or the second flat wall.

A combine harvester with separably driven rotor portions for threshing grain is described herein.

A combine harvester with separably driven rotor portions for threshing grain is described herein.

A threshing system for an agricultural harvester includes a rotor and a substantially cylindrical cage that surrounds at least a portion of the rotor. The threshing system also features a material flow adjustor for controlling axial movement of material through the cage. The material flow adjustor is movably mounted adjacent to a threshing space and includes at least one material conveying edge that enters the threshing space. The material flow adjustor is moveable between a first operative position, in which the at least one material conveying edge is spaced from the rotor in a radial direction by a first distance, and a second operative position in which the at least one material conveying edge is spaced from the rotor in the radial direction by a second distance, the second distance being less than the first distance.

A threshing system for an agricultural harvester includes a rotor and a substantially cylindrical cage that surrounds at least a portion of the rotor. The threshing system also features a material flow adjustor for controlling axial movement of material through the cage. The material flow adjustor is movably mounted adjacent to a threshing space and includes at least one material conveying edge that enters the threshing space. The material flow adjustor is moveable between a first operative position, in which the at least one material conveying edge is spaced from the rotor in a radial direction by a first distance, and a second operative position in which the at least one material conveying edge is spaced from the rotor in the radial direction by a second distance, the second distance being less than the first distance.

A tubular for processing crops can include a body having an outer surface and protrusions extending outwardly from the outer surface. The protrusions can be arranged in bands that are spaced apart along the outer surface to define gaps therebetween that form grooves extending around a circumference of the body. Each band of protrusions can be positioned offset with respect to at least one adjacent band of protrusions such that the protrusions form a spiraling configuration around a longitudinal axis of the body.

A tubular for processing crops can include a body having an outer surface and protrusions extending outwardly from the outer surface. The protrusions can be arranged in bands that are spaced apart along the outer surface to define gaps therebetween that form grooves extending around a circumference of the body. Each band of protrusions can be positioned offset with respect to at least one adjacent band of protrusions such that the protrusions form a spiraling configuration around a longitudinal axis of the body.

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.