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Servohydraulic Drive

  • US 20200132091A1
  • Filed: 10/22/2019
  • Published: 04/30/2020
  • Est. Priority Date: 10/24/2018
  • Status: Active Grant
First Claim
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1. A servohydraulic drive, comprising:

  • a hydrostatic displacement machine having a stroke volume configured to be adjusted by a hydraulic adjustment device;

    an electric machine that is mechanically speed-coupled with the displacement machine;

    a hydraulic cylinder that is fluidically connected to the displacement machine via a first working line and a second working line, the hydraulic cylinder configured to be activated by reversal of the fluid flow through the displacement machine in opposite directions;

    a low-pressure hydraulic accumulator that is preset to a low pressure and fluidically connected via a valve assembly in each case to one of the first and second working lines in which the lower pressure prevails; and

    a supply unit configured to supply the adjustment device with pressurized fluid under the necessary actuating pressure for the adjustment regardless of the present pressure in the first and second working lines.

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