Hydraulic drive

Hydraulic drive, comprising a pressure housing having a blind axial recess formed therein with a wall and a bottom, an accumulator piston with first and second opposite ends disposed in said recess, an energy accumulator in the form of springs disposed symmetrical to the central axis of said accumulator piston for continuously engaging said accumulator piston braced against said springs, a working piston in the form of a differential piston guided in said recess having a piston rod passing through said accumulator piston and disposed centrally in said pressure housing, a high-pressure pump communicating with said accumulator space for filling said accumulator space, a hydraulic control unit for controlling motion of said working piston, said piston rod, said pressure housing and said accumulator piston defining said wall of said recess, said piston rod, said pressure housing, said first end of said accumulator piston and said working piston defining an accumulator space in the form of a hydraulic accumulator providing pressure energy for the hydraulic drive, said second end of said accumulator piston and said wall and said bottom of said recess defining a plenum for receiving spent hydraulic fluid at low pressure, and said accumulator piston separating said accumulator space from said plenum.