An agricultural harvester includes an annular housing having an arcuate cross-section such that the annular housing defines a toroidal chamber therein.

Furthermore, the agricultural harvester includes a blade supported below the annular housing in a vertical direction, with the blade configured to sever top portions of plants from stalks of the plants. Additionally, the agricultural harvester includes a crop flow director positioned above the blade in the vertical direction, with the crop flow director configured to direct the severed top portions into the toroidal chamber. Moreover, the agricultural harvester includes an elevator assembly supported relative to the annular housing. In addition, the agricultural harvester includes a fan assembly configured to generate a flow of air through the annular housing to convey the severed top portions from the toroidal chamber to the elevator assembly.

An agricultural harvester includes an annular housing having an arcuate cross-section such that the annular housing defines a toroidal chamber therein.

Furthermore, the agricultural harvester includes a blade supported below the annular housing in a vertical direction, with the blade configured to sever top portions of plants from stalks of the plants. Additionally, the agricultural harvester includes a crop flow director positioned above the blade in the vertical direction, with the crop flow director configured to direct the severed top portions into the toroidal chamber. Moreover, the agricultural harvester includes an elevator assembly supported relative to the annular housing. In addition, the agricultural harvester includes a fan assembly configured to generate a flow of air through the annular housing to convey the severed top portions from the toroidal chamber to the elevator assembly.

An agricultural header includes a main section and at least one wing section, which is pivotably coupled to the main section. The main section includes a main frame. The at least one wing section includes a wing frame. The header further includes a cutting element, a linkage, and an actuator. The cutting element is supported by the main frame and the wing section. The linkage pivotably couples the at least one wing section to the main section. The linkage includes an upper bar and a lower bar which are both coupled to the main frame and to the wing frame. The actuator is coupled to at least one of the upper bar, the lower bar, and the at least one wing section.

An agricultural header includes a main section and at least one wing section, which is pivotably coupled to the main section. The main section includes a main frame. The at least one wing section includes a wing frame. The header further includes a cutting element, a linkage, and an actuator. The cutting element is supported by the main frame and the wing section. The linkage pivotably couples the at least one wing section to the main section. The linkage includes an upper bar and a lower bar which are both coupled to the main frame and to the wing frame. The actuator is coupled to at least one of the upper bar, the lower bar, and the at least one wing section.

A threshing concave has two curved end plates spaced from one another and a set of concave bars extending between the end plates. An elongate gap is presented between each adjacent pair of the concave bars, through which gaps threshed grain can pass during operation. Concave rods extend in the same direction as the end plates and through holes provided in the concave bars. One or more blanking plates are releasably bolted to the end plates and extend along respective elongate gaps.

A residue management system or method can be implemented for an agricultural harvester that includes a residue processing system. A sensor arrangement can be in communication with one or more components of the residue processing system. The sensor arrangement can be configured to measure indicators of a mass flow rate of the crop residue through the crop residue system across a width of a stream of the crop residue.

A residue management system or method can be implemented for an agricultural harvester that includes a residue processing system. A sensor arrangement can be in communication with one or more components of the residue processing system. The sensor arrangement can be configured to measure indicators of a mass flow rate of the crop residue through the crop residue system across a width of a stream of the crop residue.

Disclosed is an articulated harvesting combine of a forward power processing unit (PPU) and a rear grain cart, wherein the PPU carries dual axially mounted engines with oppositely opposed crankshafts with one toward the rear grain cart and the other engine away from the rear grain cart, there being no comingling of flywheel output power flow between the two engines.

A weeding machine and a weeding method for seedlings in a paddy field are disclosed. The weeding machine includes a paddy field power chassis, a lifting hydraulic cylinder, a parallelogram suspension frame, a weeding frame, a transmission assembly, and weeding units. The paddy field power chassis vertically adjusts the working depth of the weeding machine through the parallelogram suspension frame and the lifting hydraulic cylinder. The power is transmitted to the weeding units by the transmission assembly. The weeding units are used for pulling out weeds between rows and feeding the weeds to weed chopping channels. Spiral weed chopping knives are used for chopping the weeds and conveying the weeds to feeding channels. Bidirectional variable-pitch augers are used for conveying the chopped weeds to discharge openings of the feeding channels under pressure and discharging the chopped weeds for burying weeds between plants.

A weeding machine and a weeding method for seedlings in a paddy field are disclosed. The weeding machine includes a paddy field power chassis, a lifting hydraulic cylinder, a parallelogram suspension frame, a weeding frame, a transmission assembly, and weeding units. The paddy field power chassis vertically adjusts the working depth of the weeding machine through the parallelogram suspension frame and the lifting hydraulic cylinder. The power is transmitted to the weeding units by the transmission assembly. The weeding units are used for pulling out weeds between rows and feeding the weeds to weed chopping channels. Spiral weed chopping knives are used for chopping the weeds and conveying the weeds to feeding channels. Bidirectional variable-pitch augers are used for conveying the chopped weeds to discharge openings of the feeding channels under pressure and discharging the chopped weeds for burying weeds between plants.