Title:
HYDRAULIC SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/105560
Kind Code:
A1
Abstract:
A hydraulic system comprising: a cylinder that moves a moving body in the vertical direction, by using the expansion and contraction of a rod; a first bidirectional pump connected to a head-side chamber in the cylinder by a first supply/discharge line; a second bidirectional pump connected to a rod-side chamber in the cylinder by a second supply/discharge line and coupled to the first bidirectional pump so as to be capable of transmitting torque; a relay line connecting the first bidirectional pump and the second bidirectional pump such that hydraulic fluid discharged from either the first bidirectional pump or the second bidirectional pump is guided to the other; and a servo motor that drives either the first bidirectional pump or the second bidirectional pump. At least either the first bidirectional pump or the second bidirectional pump is a variable-capacity pump capable of arbitrarily changing the discharge capacity per rotation thereof.
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Inventors:
KONDO AKIHIRO
MITSUI HIROAKI
TOYOTA TOSHIHISA
MIBU KOKI
NAKATSUJI TAKASHI
MITSUI HIROAKI
TOYOTA TOSHIHISA
MIBU KOKI
NAKATSUJI TAKASHI
Application Number:
PCT/JP2019/044916
Publication Date:
May 28, 2020
Filing Date:
November 15, 2019
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
F15B11/044; F15B11/02; F15B11/08
Foreign References:
| JPH07127606A | 1995-05-16 | |||
| JP2004176893A | 2004-06-24 | |||
| JP2004301189A | 2004-10-28 | |||
| US6527540B1 | 2003-03-04 |
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
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