| 摘要 |
The invention relates to a hydraulic lift with an accumulator (16). Accordin g to the invention, a pump (13) is situated between the hydraulic drive (2) an d the accumulator (16), this pump being driven by a motor (14) and providing a means for conveying hydraulic oil from the hydraulic drive (2) to the accumulator (16) and vice versa without the presence of control valves which influence the flow of hydraulic oil, such as proportionally pilot-operated valves. Since the pump (13) is subjected to the pressure PZ in the cylinder line (11) and the pressure PS in the accumulator line (15), the motor (14) o f the pump (13) only has to work against the differential pressure and in certain operating states, can even function as a generator and release electrical energy through a power output device (23) controlling it. This reduces the energy requirements for operating the lift. The speed of the car (1) is controlled or regulated through the control of the motor (14) alone b y a control and regulation device (25), through the power output device (23).< /SDOAB>
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