FIELD: construction.
SUBSTANCE: invention relates to construction machines with rotary working element and can be used as replaceable working equipment installed on handle of single-bucket excavator. Hydraulic drive of a rotary working member of a construction machine contains two separate milling drums kinematically connected to hydraulic motors, a hydraulic accumulator, angular velocity sensors, comparator, controlled and check hydraulic valves. Hydraulic motors pressure lines are communicated with the base machine first hydraulic pump output through hydraulic check valves and hydraulic control valve, and through controlled hydraulic valves and hydraulic control valve are communicated with hydraulic accumulator connected to the output of the second hydraulic pump of the base machine. Angular velocity sensors are installed on milling drums and are connected to input of comparator element, output electric lines of which are connected to control elements of controlled hydraulic valves. Safety hydraulic valve of the second hydraulic pump is set to a higher value of pressure in comparison with the safety hydraulic valve of the first hydraulic pump.
EFFECT: simplified design, lower costs, higher reliability of the hydraulic drive and working element.
1 cl, 1 dwg
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