Title:
FLUID PRESSURE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/147261
Kind Code:
A1
Abstract:
Provided is a fluid pressure circuit that can smoothly control a rod of a cylinder device controlled according to an operation command. A fluid pressure circuit (52) comprises: a tank (8) that stores a fluid, a fluid pressure actuator (2) that pressurizes the fluid in the tank (8); a cylinder device (5) that expands and contracts due to the pressurized fluid from the fluid pressure actuator (2); a flow control valve (4) that is disposed between the fluid pressure actuator (2) and the cylinder device (5), and switches the flow path of the pressurized fluid, and that discharges returning fluid from the cylinder device (5) via a first throttle (As); a regenerative variable switching valve (9) that discharges returning fluid from the cylinder device (5) to the flow control valve (4) during non-regeneration and branches and discharges some of the returning fluid via a second throttle (Ab) during regeneration; a regenerative motor (10) driven in a regenerative manner by the fluid branched by the regenerative variable switching valve (9); and a third throttle (Ax) that is connected in series to the first throttle (As) and that limits the flow rate of the returning fluid during regeneration.
Inventors:
SHIMADA YOSHIYUKI (JP)
Application Number:
PCT/JP2018/003973
Publication Date:
August 16, 2018
Filing Date:
February 06, 2018
Export Citation:
Assignee:
EAGLE IND CO LTD (JP)
International Classes:
F15B21/14; E02F9/22; F15B11/044
Foreign References:
| JP2016014398A | 2016-01-28 | |||
| JP2014029180A | 2014-02-13 | |||
| JP2014029180A | 2014-02-13 |
Other References:
See also references of EP 3581809A4
Attorney, Agent or Firm:
SHIGENOBU Kazuo et al. (JP)
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