HYDRAULIC DRIVE AND METHOD OF ITS ADJUSTMENT Russian patent published in 2001 - IPC

FIELD: automatic control of working members. SUBSTANCE: hydraulic drive has housing, distributing spool, digital-to-analog converter with feedback rod connected by hydraulic main lines, including return and delivery main lines, with rotary actuating mechanism whose pistons interact with output shaft. Cam of feedback device is secured on output shaft. Cam of feedback device has involute generatrix of outer surface, circumference of involute being coaxial with axis of output shaft. Cam rests on roller installed on rod of digital-to-analog converter for rotation around its axis parallel to axis of output shaft. Cam of feedback device is installed for turning relative to output shaft and is furnished with hub and retainers. Rollers is furnished with unit to change axial position relative to feedback rod of digital-to-analog converter. EFFECT: improved manufacturability, reduced mass of drive. 3 cl, 2 dwg