Title:
VALVE UNIT AND VALVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/131195
Kind Code:
A1
Abstract:
A valve unit (1) according to one embodiment of the present invention includes a valve device (3) and a control device (8). The valve device (3) includes: a spool valve (61) that switches the oil discharge direction of a working oil with respect to a hydraulic actuator; and a poppet-type logic valve (71) interposed between the spool valve (61) and an oil pump (21). The control device (8) controls the spool valve (61) and the logic valve (71) so that: when the supply flow rate of the working oil to the hydraulic actuator is smaller than a predetermined value, the opening area of a meter-in flow path (6a or 6c) of the spool valve (61) is smaller than the opening area of the logic valve (71); and when the supply flow rate of the working oil to the hydraulic actuator is greater than a predetermined value, the opening area of a meter-in flow path of the spool valve (61) is greater than the opening area of the logic valve (71).
Inventors:
AOKI SEIJI
TODE YOSHIYUKI
OHIRA MASAHIRO
TODE YOSHIYUKI
OHIRA MASAHIRO
Application Number:
PCT/JP2021/045759
Publication Date:
June 23, 2022
Filing Date:
December 13, 2021
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
F15B11/02; E02F9/22
Foreign References:
| JPH06123302A | 1994-05-06 | |||
| JPH01108402A | 1989-04-25 | |||
| JPH11303814A | 1999-11-02 | |||
| JPH03272306A | 1991-12-04 |
Attorney, Agent or Firm:
ARCO PATENT & TRADEMARK ATTORNEYS (JP)
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