Title:
HYDRAULIC SYSTEM OF WORK MACHINE
Document Type and Number:
Japanese Patent JP2019143806
Kind Code:
A
Abstract:
To provide a system which can easily obtain a manipulated variable of an operation valve moving according to an operation of an operation member, and can adjust a traveling speed.SOLUTION: A hydraulic system of a work machine comprises: a first pump 23 for discharging hydraulic oil; a first oil path 30; an operation valve 60 which is arranged in the first oil path, and can change the pressure of the hydraulic oil; an operation valve 31 which is arranged at a downstream side of the operation valve in the first oil path, and can change the pressure of the hydraulic oil output according to an operation of an operation member 9L; a second oil path 32 connected to the operation valve; a second pump 24 which can change an output by the working fluid flowing in the second oil path; a traveling motor 35 which can change a traveling speed by the working fluid discharged from the second pump; a third oil path 33 which is an oil path for connecting the second pump and the traveling motor to each other, and makes the working fluid circulate between the second pump and the traveling motor; a setting member 61 which can set a plurality of setting values; and a control part 62 which can change an opening of the operation valve on the basis of the set value.SELECTED DRAWING: Figure 3
Inventors:
FUKUDA YUJI
SAKURAI DAISUKE
NAKAGAWA HIROAKI
SAKURAI DAISUKE
NAKAGAWA HIROAKI
Application Number:
JP2019053224A
Publication Date:
August 29, 2019
Filing Date:
March 20, 2019
Export Citation:
Assignee:
KUBOTA KK
International Classes:
F15B11/02; E02F9/20; E02F9/22; F16H61/4035
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Attorney, Agent or Firm:
Mikio Yasuda