TRACTOR POWER TAKE-OFF DRIVE WITH ADJUSTABLE ROTATION FREQUENCY Russian patent published in 1997 - IPC

FIELD: automotive engineering. SUBSTANCE: this power take-off drive can be used on agricultural tractors for producing several stable output shaft rotation modes, and changing from one mode to other is effected without interruption of transmitted power flow. This is achieved due to rigid kinematic link between driving and driven members of power take-off drive depending on signal sent from ground metering wheel. Automatic synchronization of take-off shaft rotation speed and actual travel speed is performed by dividing power flow into two parallel flows created by one gearing unit, two bevel gear differentials with feedback between them and worm gearing. Synchronization of take-off rotation speed depending on real travel speed is realized by correction of rotation speed through bevel gear pair by signal transmitted from fifth wheel. Transition from one mode to other is carried out by mechanical gear reducer for changing gear ratio without interruption of power flow. EFFECT: high efficiency. 2 dwg