Selectively removable nozzles for inclusion into a grain conveyor may include a ramp and a sidewall coupled to the ramp. The ramp may conform to an inner surface of a conveyor housing and produce a constriction within the housing. The sidewall may also conform to the inner surface of the conveyor housing. The ramp may also include a recess that extends along the sidewall. The recess may receive a shaft of the conveyor. One nozzle may be replaced with another in order to accommodate different harvesting conditions. The ramp compresses grain traveling through the conveyor to provide a continuous flow of grain. The continuous flow of grain provides for accurate measurements of grain characteristics by a sensor located adjacent to the flow of grain.

Selectively removable nozzles for inclusion into a grain conveyor may include a ramp and a sidewall coupled to the ramp. The ramp may conform to an inner surface of a conveyor housing and produce a constriction within the housing. The sidewall may also conform to the inner surface of the conveyor housing. The ramp may also include a recess that extends along the sidewall. The recess may receive a shaft of the conveyor. One nozzle may be replaced with another in order to accommodate different harvesting conditions. The ramp compresses grain traveling through the conveyor to provide a continuous flow of grain. The continuous flow of grain provides for accurate measurements of grain characteristics by a sensor located adjacent to the flow of grain.

A concave for an agricultural combine includes opposite side plates or rails, each having a curved upper edge with a plurality of square notches formed in the upper edge. A series of rectangular bars are secured to the side rails via end tabs received in the notches, such that the bars are spaced longitudinally apart from one another to define uniform laterally extending gaps between adjacent bars. The concave is free from structures or obstructions in the gaps, so as to minimize plugging of the concave. Each bar has a leading edge with the radius to minimize damage to harvested grain during the threshing process.

A control system for controlling a motion of an auger tube of a combine harvester comprises a dynamic pre-filter, a position controller, and a speed controller. The dynamic pre-filter receives a desired position value for the auger tube and generates a filtered desired position signal which changes the desired position value from an old value to a new value over a time period. The position controller receives a first difference between the filtered desired position signal and an actual position of the auger tube. The position controller generates a desired angular speed signal that varies according to the first difference. The speed controller receives a second difference between the desired angular speed signal and an actual speed of the auger tube. The speed controller generates an actuator signal that varies according to the second difference and is received by an actuating system that moves the auger tube.

A control system for controlling a motion of an auger tube of a combine harvester comprises a dynamic pre-filter, a position controller, and a speed controller. The dynamic pre-filter receives a desired position value for the auger tube and generates a filtered desired position signal which changes the desired position value from an old value to a new value over a time period. The position controller receives a first difference between the filtered desired position signal and an actual position of the auger tube. The position controller generates a desired angular speed signal that varies according to the first difference. The speed controller receives a second difference between the desired angular speed signal and an actual speed of the auger tube. The speed controller generates an actuator signal that varies according to the second difference and is received by an actuating system that moves the auger tube.

A first threshing section 15 and a second threshing section 16 are provided. The first threshing section 15 includes a first threshing drum 17 that rotates about a left-right-oriented axis, and the second threshing section 16 includes a second threshing drum 28 that rotates about a body front-rear-oriented axis. The second threshing drum 28 includes a rotary support shaft 29 extending along a front-rear direction, a plurality of rod-shaped frame bodies 30 that are arranged side by side extending along the front-rear direction and at and interval in the peripheral direction, radially outward of the rotary support shaft 29, and threshing teeth 31 attached to the frame bodies 30.

A first threshing section 15 and a second threshing section 16 are provided. The first threshing section 15 includes a first threshing drum 17 that rotates about a left-right-oriented axis, and the second threshing section 16 includes a second threshing drum 28 that rotates about a body front-rear-oriented axis. The second threshing drum 28 includes a rotary support shaft 29 extending along a front-rear direction, a plurality of rod-shaped frame bodies 30 that are arranged side by side extending along the front-rear direction and at and interval in the peripheral direction, radially outward of the rotary support shaft 29, and threshing teeth 31 attached to the frame bodies 30.

A harvesting machine has a crop tank and a conveyor screw inside the tank which extends from a material inlet opening on a wall of the crop tank into the interior of the crop tank. The conveyor screw comprises at least one proximal portion adjacent to the material inlet opening and one distal portion spaced apart from the material inlet opening at least by the proximal portion. The proximal portion and distal portion are rotatable around conveying axes running in different directions. The conveyor screw can be operated in a work position in which the conveying axis of the distal portion is oriented to be steeper than the conveying axis of the proximal portion.

A harvesting machine has a crop tank and a conveyor screw inside the tank which extends from a material inlet opening on a wall of the crop tank into the interior of the crop tank. The conveyor screw comprises at least one proximal portion adjacent to the material inlet opening and one distal portion spaced apart from the material inlet opening at least by the proximal portion. The proximal portion and distal portion are rotatable around conveying axes running in different directions. The conveyor screw can be operated in a work position in which the conveying axis of the distal portion is oriented to be steeper than the conveying axis of the proximal portion.

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.