CONCAVE OF THRESHING DEVICE OF COMBINE HARVESTER FOR HARVESTING CORN Russian patent published in 2024 - IPC A01F12/26 A01D41/12 

FIELD: agriculture.

SUBSTANCE: concave of the threshing device of a combine harvester for harvesting corn comprises welded frame (1) formed by sidewalls, guides installed on the inner surface of the sidewalls, two detachable sections (2) installed on guides located between the sidewalls in the front part of frame (1) of the concave and representing a welded frame, formed by sidewalls, transverse planks, longitudinal plates and bars passing through transverse planks, flaps pivotally installed in the lead-in part of the concave, and a system of links. Transverse planks are arranged perpendicular to frame (1) sidewalls. Longitudinal ribs are located parallel to frame (1) sidewalls at equal distance from each other. Shield (3) is installed on the surface of the front transverse plank. Apron (4) is installed on the surface of the rear transverse plank. Bars are installed in holes of transverse planks. Pins are rigidly fixed on surface of longitudinal rib. Axes are installed in holes of longitudinal ribs and guides. Parallel to transverse planks in removable sections (2) there are floors. On the pins of frame (1) of the concave a lever and a handle connected to a system of links are hingedly fixed. Longitudinal ribs are aligned with the cutouts of the transverse planks by means of cutouts and are rigidly fixed on the transverse planks. Transverse planks are installed with pins in rectangular holes of concave frame (1) sidewalls and are rigidly fixed on them. Support surface of front transverse plank coincides with support surface of guides. Bars are rigidly fixed in the holes of the last transverse plank located in the rear part of frame (1).

EFFECT: higher efficiency of combine harvester and main working time, reduction of human resources spent on installation and dismantling of detachable sections, as well as higher reliability and longer life of concave structure.

10 cl, 8 dwg