Title:
HYDRAULIC MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/058711
Kind Code:
A1
Abstract:
A hydraulic motor control device (100) comprises a volume switching valve (30) that controls the flow of working oil supplied to and discharged from a pair of switching actuators (20, 21) that change the volume of a piston motor (1) by driving a swash plate (2). The volume switching valve (30) includes: a first control port (31d) that is open to a housing hole (33) and through which working oil supplied to and discharged from the switching actuator (20) is guided; a second control port (31e) that is open to the housing hole (33) and through which the working oil supplied to and discharged from the switching actuator (21) is guided; and a drain port (31c) that is open to the housing hole (33) and communicates with a tank (51). The drain port (31c) is provided between the first control port (31d) and the second control port (31e) in a movement direction of a spool (40).
Inventors:
SAKAI YUKI (JP)
Application Number:
PCT/JP2018/025758
Publication Date:
March 28, 2019
Filing Date:
July 06, 2018
Export Citation:
Assignee:
KYB CORP (JP)
International Classes:
F15B11/02; F03C1/253; F16K11/07
Foreign References:
| JPH01116301A | 1989-05-09 | |||
| JPS4964029A | 1974-06-21 | |||
| JPS4411269Y1 | 1969-05-09 | |||
| JPH0193603A | 1989-04-12 | |||
| JP2017015152A | 2017-01-19 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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