HYDRAULIC DRIVING DEVICE

WIPO Patent Application WO/2023/248682

A1

Provided is a hydraulic driving device which drives a hydraulic cylinder that supplies and discharges a working fluid to each of a head-side port and a rod-side port, said hydraulic driving device comprising: a hydraulic pump motor which discharges a working fluid and which is rotationally driven by a supplied working fluid; an electric motor which is connected to the hydraulic pump motor; a direction control valve which switches the direction of a working fluid flowing between the hydraulic pump motor and the head-side port; a regeneration valve which opens and closes a regeneration passage that connects the head-side port and the rod-side port; a pressure sensor which detects an inflow pressure of the hydraulic pump motor; and a control device which controls the operation of each of the direction control valve and the regeneration valve. When the regeneration valve opens the regeneration passage and the direction control valve connects the head-side port and the hydraulic pump motor, the control device controls the degree of opening of the regeneration valve according to the inflow pressure of the working fluid detected by the pressure sensor.

MURAOKA HIDEYASU
KINOSHITA NOBUYUKI
YUDATE YOJI
HATA YOSHIHIKO
KUWABARA YUKI
MIYAGI YUICHI

PCT/JP2023/019119

December 28, 2023

May 23, 2023

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KAWASAKI HEAVY IND LTD (JP)

F15B11/024; F15B11/00; F15B21/14

JP2011149473A	2011-08-04
JP2008157407A	2008-07-10
JP2004138187A	2004-05-13
JP2022001769A	2022-01-06
JP2008075753A	2008-04-03

ISHIDA, Shoji (JP)

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