A concave for an agricultural combine includes first and second frames and a threshing mat that includes threshing bars each including a separating grate. An engagement assembly non-destructively connects each of the threshing bars to the first frame, the threshing bars form openings therebetween for grain to pass through, the separating grate of each of the threshing bars extends across an adjacent one of the openings for separating grain from threshed crop material, and the separating grate of each of the threshing bars is fixedly connected to an adjacent one of the threshing bars. The engagement assemblies enable non-destructive removal of the threshing mat from the first frame, when the second frame is spaced apart from the first frame. The second frame restrains non-destructive removal of the threshing mat from the first frame via the engagement assemblies, when the second frame is juxtaposed to the first frame.

A concave for an agricultural combine includes first and second frames and a threshing mat that includes threshing bars each including a separating grate. An engagement assembly non-destructively connects each of the threshing bars to the first frame, the threshing bars form openings therebetween for grain to pass through, the separating grate of each of the threshing bars extends across an adjacent one of the openings for separating grain from threshed crop material, and the separating grate of each of the threshing bars is fixedly connected to an adjacent one of the threshing bars. The engagement assemblies enable non-destructive removal of the threshing mat from the first frame, when the second frame is spaced apart from the first frame. The second frame restrains non-destructive removal of the threshing mat from the first frame via the engagement assemblies, when the second frame is juxtaposed to the first frame.

A system for installing separator grates within a combine may include a grate frame having first and second frame members extending circumferentially between proximal and distal ends. The system may also include a first and second separator grate sections configured to be supported between the frame members along first and second circumferential frame sections of the grate frame, respectively. Additionally, the grate frame may include first and second guide rails extending between the frame members along at least a portion of the first circumferential frame section. When the first separator grate section is being installed from a side of the grate frame located adjacent to the proximal end, at least a portion of the first separator grate section may be configured to ride along the guide rails at a location between the frame member as the first separator grate section is moved towards the distal end of the grate frame.

A removable cover plate to be used in a threshing module of an agricultural machine, e.g., a grain harvester. The removable cover plate provides a uniform and homogeneous distribution of grains onto a cleaning and harvesting system of the machine. The removable cover plate is designed to be applied to at least one part of a concave of the cleaning and harvesting system of the machine. The cleaning and harvesting system includes at least one rotor and a least one concave mounted around the rotor, to which is attached and installed a removable structure that has a material retention surface, in which there are provided openings to limit grains and/or MOG passage.

A removable cover plate to be used in a threshing module of an agricultural machine, e.g., a grain harvester. The removable cover plate provides a uniform and homogeneous distribution of grains onto a cleaning and harvesting system of the machine. The removable cover plate is designed to be applied to at least one part of a concave of the cleaning and harvesting system of the machine. The cleaning and harvesting system includes at least one rotor and a least one concave mounted around the rotor, to which is attached and installed a removable structure that has a material retention surface, in which there are provided openings to limit grains and/or MOG passage.

Concave cover plates for a rotary processing system of a combine harvester have strategically placed holes therein design to concentrate grain output from the concave grates of the rotary processing system at a circumferential mid-region of the concave grates to promote even loading of a set of oscillating sieves in an underlying cleaning mechanism of the combine harvester. A set of such plates are installed in a series of progressively increasing openness in the circumferential direction of the concave grates in a rearward direction through the processing system, for more grain-on-grain threshing and more centralized output at a front intake end than at spots further rearward therefrom.

Concave cover plates for a rotary processing system of a combine harvester have strategically placed holes therein design to concentrate grain output from the concave grates of the rotary processing system at a circumferential mid-region of the concave grates to promote even loading of a set of oscillating sieves in an underlying cleaning mechanism of the combine harvester. A set of such plates are installed in a series of progressively increasing openness in the circumferential direction of the concave grates in a rearward direction through the processing system, for more grain-on-grain threshing and more centralized output at a front intake end than at spots further rearward therefrom.

A Threshing apparatus in a combine harvester with a main frame and a threshing rotor supported by the main frame. A concave frame supports one or more interchangeable arcuate concave grate segments in a grate reception zone. An adjustment mechanism provides adjustment of clearance between the concave grate segments and the rotor. A multi-position stop device is provided to determine the lower limit of a concave adjustment range. The position of the stop device is determined by a profile of an installed concave grate segment.

A Threshing apparatus in a combine harvester with a main frame and a threshing rotor supported by the main frame. A concave frame supports one or more interchangeable arcuate concave grate segments in a grate reception zone. An adjustment mechanism provides adjustment of clearance between the concave grate segments and the rotor. A multi-position stop device is provided to determine the lower limit of a concave adjustment range. The position of the stop device is determined by a profile of an installed concave grate segment.

A concave for a combine harvester having a first side support member and a second side support member. The concave can further include a threshing bar secured to the first and second side support members, the threshing bar having a cut-out that extends the length of the threshing bar such that the cut-out defines a first face and a second face for the threshing bar. In addition, the first and second side support members can each include a top surface having a first face and a second face, wherein the first face and the second face of the first and second side support members substantially axially align with the first face and the second face of the threshing bar.