A threshing device with two-way pull wires and adjustable threshing clearance includes a tensioning mechanism, and several grid bars in clearance fit with side plates, wherein the tensioning mechanism is mounted on the several grid bars so that the grid bars can move in radial and tangential directions in the clearance; the tensioning mechanism includes a tangential tensioning device and a radial tensioning device, wherein the radial tensioning device is mounted in the radial direction of any one of the grid bars, so that the grid bars can move in the radial direction in the clearance; the tangential tensioning device is mounted in series in the tangential direction of the grid bars, so that the grid bars can move in the tangential direction in the clearance. Further disclosed is a combined harvester, which includes the threshing device with two-way pull wires and adjustable threshing clearance.

A system and a method are provided for controlling a combine harvester. The method includes the steps of: receiving grain flow sensor signals from a plurality of grain flow sensors; based on the received grain flow sensor signals, determining a current load on a straw walker section; and based on the current load, adjusting an aggressiveness setting of a threshing and separation section of the combine harvester. The grain flow sensors are provided underneath and adjacent to a crop transfer surface of the straw walker section of the combine harvester and are distributed over a length of the straw walker section.

A longitudinal axial flow drum structure having an adjustable threshing diameter includes a threshing drum, a transmission mechanism, a diameter regulating mechanism and a regulating steel wire pulling mechanism. The transmission mechanism delivers power to regulating devices of the diameter regulating mechanism. The diameter regulating mechanism is connected with the transmission mechanism and the threshing drum to enable threshing diameter regulation. The transmission mechanism and the diameter regulating mechanism are installed inside a feeding cylinder of the threshing drum. The threshing diameter is regulated in real-time and stepless manner by adjusting the regulating steel wire pulling mechanism to pull a regulating steel wire in the transmission mechanism.

A rotor for an agricultural implement such as a self-propelled harvester. The rotor includes a surface and one or more rasp bars which comprise a crop engaging portion that is immobile relative to the surface and a crop engaging portion that is movable relative to the surface, in that a distance between at least part of the movable portion and the surface of the rotor is variable. One of the crop engaging portions is a primary portion configured to engage with crop regardless of whether it is movable or not, while the other is a secondary portion that comprises a crop engaging feature such as a tooth for increasing traction on the crop. The crop engaging feature is activated, by either extending radially outwardly from the primary portion, or deactivated by lying at a same radial position or radially inwardly of the primary portion.

A concave section for a harvester includes a concave body having an upstream side, a downstream side, a leading end and a trailing end. The concave body defines an arcuate crop engagement face facing radially inwardly. A plurality of crop passage openings are defined through the arcuate crop engagement face. A cover is configured to at least partially cover at least some of the crop passage openings. The cover is carried by the concave body and is movable thereon between at least two different positions to adjust a degree of openness of at least some of the crop passage openings.

A combine harvester for harvesting crop including a header, to cut crop, and a feeder house having an inlet, connected to the header, and an outlet, wherein the feeder house defines an interior and an exterior located outside the feeder house. The combine harvester includes one or more sensor assemblies connected to the feeder house, wherein each of the sensor assemblies provides a relative humidity value or both of a relative humidity value and a temperature value. A controller is operatively connected to the plurality of sensor assemblies, wherein the controller receives the relative humidity value or temperature value from each of the plurality of sensor assemblies. In response to the received relative humidity value or temperature value, the controller identifies a recommended setting for one or more harvester devices, parts, or components, to avoid grain loss and grain breakage resulting from crop moisture conditions.

A threshing and separating system for an agricultural harvester includes a concave having a plurality of perforations; a rotor having an outer surface and at least partially enclosed by the concave; and a plurality of rasp bars connected to the outer surface of the rotor, each rasp bar having a working surface defining a working angle relative to a tangent of the outer surface. At least one of the rasp bars is an adjustable rasp bar with an adjustable working surface pivotably coupled to the rotor. The system further includes an actuator coupled to the adjustable rasp bar and configured to selectively pivot the adjustable working surface to adjust the working angle of the adjustable rasp bar.

A threshing system for use in an agricultural harvester. The threshing system includes a rotor and a perforated concave system. The rotor has a rotational axis. The perforated concave system is spaced radially outwardly from the rotor for passage of grain through perforations as the rotor moves crop material across the concave system. The concave system has at least one concave section having a rigid frame, pivotal members, and an arcuate movable member. The rigid frame has a plurality of sides rigidly coupled together. The pivotal members are pivotally coupled and extend to two of the sides of the rigid frame. The arcuate movable member interacts with the plurality of pivotal members to pivot each of the pivotal members as the arcuate movable member is moved along a segment of an arc generally about the rotational axis.

A dynamically operated concave threshing bar system, method, and apparatus is disclosed wherein one or more threshing bars within a concave can dynamically move to various positions in real-time based on one or more conditions such as the type crop being harvested and on a determination by a combine harvester's computerized system, artificial intelligence (AI) system, or upon the operators input, among others. The concave can include a concave frame having a pair of arcuate side members, a threshing bar, and an actuator coupled to the threshing bar, wherein the actuator can be configured to move the threshing bar along the arcuate side members of the concave frame.

A threshing device with two-way pull wires and adjustable threshing clearance includes a tensioning mechanism, and several grid bars in clearance fit with side plates, wherein the tensioning mechanism is mounted on the several grid bars so that the grid bars can move in radial and tangential directions in the clearance; the tensioning mechanism includes a tangential tensioning device and a radial tensioning device, wherein the radial tensioning device is mounted in the radial direction of any one of the grid bars, so that the grid bars can move in the radial direction in the clearance; the tangential tensioning device is mounted in series in the tangential direction of the grid bars, so that the grid bars can move in the tangential direction in the clearance. The present invention further provides a combined harvester, which includes the threshing device with two-way pull wires and adjustable threshing clearance. With the combined harvester, the threshing clearance can be adjusted by adjusting the positions of the grid bars according to the actual conditions of harvesting operation. The adjusting mechanism is relatively simple, and can easily realize automatic adjustment and control of the concave clearance.