Title:
作業機の油圧システム
Document Type and Number:
Japanese Patent JP7214447
Kind Code:
B2
Abstract:
To ensure that a plurality of control valves (hydraulic actuators) can be easily activated in a series circuit.SOLUTION: A hydraulic system of a working machine comprises: a hydraulic pump for discharging hydraulic oil; a first hydraulic actuator; a second hydraulic actuator; a first control valve for controlling the first hydraulic actuator; a second control valve arranged at a downstream side of the first control valve, and for controlling the second hydraulic actuator; a return oil passage connecting the first control valve and the first hydraulic actuator, and through which return oil discharged from the first hydraulic actuator flows; a first internal oil passage provided in the first control valve, and communicating with the return oil passage; an external oil passage communicating with the first internal oil passage, and connecting the first control valve and the second control valve; a return discharge oil passage branching from the external oil passage, and for discharging the return oil; and a throttle part provided in the return discharge oil passage.SELECTED DRAWING: Figure 1
Inventors:
Yuji Fukuda
Application Number:
JP2018214076A
Publication Date:
January 30, 2023
Filing Date:
November 14, 2018
Export Citation:
Assignee:
Kubota Corporation
International Classes:
F15B11/16; E02F3/43; E02F9/22; F15B11/044
Domestic Patent References:
| JP56035804A | ||||
| JP61294202A | ||||
| JP59160661U |
Foreign References:
| US20170175779 |
Attorney, Agent or Firm:
Mikio Yasuda