GRAIN HARVESTER THRESHING CONCAVE WITH ADJUSTABLE PIN GRATE Russian patent published in 2024 - IPC A01D41/12 A01F12/24 

FIELD: agriculture.

SUBSTANCE: concave of threshing device of combine harvester with adjustable pin grate (5) contains welded frame (1) formed by sidewalls, transverse planks and longitudinal ribs. Bars pass through transverse planks of concave frame (1). In the front part of frame (1) of the concave there is shield (3). In the rear part of frame (1) of the concave there is apron (4). In front part of frame (1) of concave there are removable sections (2). Brackets are installed on apron (4) beam surface. In the rear part of frame (1) of the concave there is pin grate (5) consisting of guide (10) and lever (11). Pin grate (5) on apron (4) brackets and on concave frame (1) sides are fixed by axes. Guide (10) includes a base, an axis made in the form of a round pipe, plates and a comb. Axis and plates are rigidly connected to the base. Comb is fixed by means of bolted connection. Lever (11) is hingedly fixed on the guide plates and represents a welded structure consisting of a pipe of round section and straps located at the edges of the pipe and rigidly connected to each other.

EFFECT: enabling increase in the combine harvester efficiency, increase of the main working time and reduction of time and human resources expenditures for re-equipment for various crops harvesting.

10 cl, 4 dwg