Title:
HYDRAULIC DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/248680
Kind Code:
A1
Abstract:
This hydraulic drive device is for supplying a working fluid to a hydraulic cylinder having a head-side port and a rod-side port, and comprises: a hydraulic pump motor having a suction port and a discharge port; an electric motor that is connected to the hydraulic pump motor; a directional control valve that switches a connection destination of the head-side port between the discharge port and the suction port; a regeneration valve that opens and closes a regeneration passage connecting the head-side port and the rod-side port; and an unloading valve that connects a discharge passage connecting the discharge port and the directional control valve to a tank.
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Inventors:
MURAOKA HIDEYASU
KINOSHITA NOBUYUKI
YUDATE YOJI
HATA YOSHIHIKO
KUWABARA YUKI
MIYAGI YUICHI
KINOSHITA NOBUYUKI
YUDATE YOJI
HATA YOSHIHIKO
KUWABARA YUKI
MIYAGI YUICHI
Application Number:
PCT/JP2023/019117
Publication Date:
December 28, 2023
Filing Date:
May 23, 2023
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
F15B21/14; F15B11/00; F15B11/024
Foreign References:
| JP2011149473A | 2011-08-04 | |||
| JP2008157407A | 2008-07-10 | |||
| JP2004138187A | 2004-05-13 | |||
| JP2022001769A | 2022-01-06 | |||
| JP2019052702A | 2019-04-04 | |||
| JP2016217378A | 2016-12-22 | |||
| JP2021181789A | 2021-11-25 | |||
| JP2008075753A | 2008-04-03 |
Attorney, Agent or Firm:
ISHIDA, Shoji (JP)
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