CONCAVE OF THRESHING DEVICE OF COMBINE HARVESTER Russian patent published in 2024 - IPC A01D41/12 

FIELD: agricultural engineering.

SUBSTANCE: invention relates to threshing and separating devices for grain harvesters. The concave comprises a welded frame 1 formed by sidewalls, guides installed on the inner surface of the sidewalls, two removable sections 2 installed on guides between the sidewalls in the front part of the concave frame and representing a welded frame formed by sidewalls, transverse strips, longitudinal plates and rods passing through transverse bars, flaps hingedly installed in the entry part of the concave, and a rod system. In this case, transverse strips are introduced, located perpendicular to the sidewalls of the frame, longitudinal ribs located parallel to the sidewalls of the frame at the same distance from each other, rods installed in the holes of the transverse strips, pins welded to the surface of the longitudinal rib, pre-aligned with holes made on the longitudinal rib , axles installed in the holes of the longitudinal ribs and guides, shield 3 installed on the surface of the front transverse bar, apron 4 installed on the surface of the rear transverse bar, lever and handle hinged on the pins of the concave frame and with a rod system.

EFFECT: concave increases the productivity of the combine harvester and increases its maintainability.

10 cl, 6 dwg