ATTACHED FARM MACHINE DRAFT DETERMINATION APPARATUS Russian patent published in 1996 - IPC

FIELD: agriculture. SUBSTANCE: apparatus has front supporting plate with brackets for tie-rods tractor attachment system, rear supporting plate for automatic hitch, which are interconnected through tension fingers with temperature sensitive members, and rear supporting plate blocking device. Blocking device has double-action power cylinder, conical head, spacer sleeve and centering sleeve with conical surfaces. Power cylinder is fixed on front supporting plate by flange adjacent to brackets and is equally spaced from tension metering links, which are joined with attachment system tie-rod brackets. Conical head is mounted on power cylinder stem received in spacer sleeve opening. Spacer sleeve is fixed on front supporting plate for engagement with outer conical surface of centering sleeve. Conical head is engageable with inner conical surface of centering sleeve. EFFECT: increased efficiency and enhanced reliability in operation. 4 cl, 13 dwg