发明名称 |
Work machine |
摘要 |
Provided is a load sensing system for controlling a discharge pressure of the hydraulic pump so as to render a differential pressure obtained by subtracting a maximum load pressure among the hydraulic actuators from a discharge pressure of the hydraulic pump to be a constant pressure, and there are provided: a first load pressure flow passage which introduces load pressures of the hydraulic actuators to be outputted to a PLS transmission line which transmits the maximum load pressure among the hydraulic actuators at the time of activating the hydraulic actuators; and a second load pressure flow passage which is a flow path for introducing the load pressures of the hydraulic actuators to be outputted to the PLS transmission line during operation after activations of the hydraulic actuators, and wherein a flow rate of the pressure oil therein is reduced than that in the first load pressure flow passage. |
申请公布号 |
US9377034(B2) |
申请公布日期 |
2016.06.28 |
申请号 |
US201214239361 |
申请日期 |
2012.12.11 |
申请人 |
KUBOTA CORPORATION |
发明人 |
Horii Hiroshi |
分类号 |
F15B11/16;F15B13/02;E02F3/96;E02F9/22;F15B7/00 |
主分类号 |
F15B11/16 |
代理机构 |
Greenblum & Bernstein, P.L.C. |
代理人 |
Greenblum & Bernstein, P.L.C. |
主权项 |
1. A working machine comprising:
a plurality of hydraulic actuators; a variable displacement hydraulic pump for supplying pressure oil to these hydraulic actuators; and a load sensing system for controlling a discharge pressure of the hydraulic pump so as to render a differential pressure obtained by subtracting a maximum load pressure among the hydraulic actuators from a discharge pressure of the hydraulic pump to be a constant pressure, wherein the working machine is provided with: a first load pressure flow passage which introduces load pressures of the hydraulic actuators to be outputted to a PLS transmission line which transmits the maximum load pressure among the hydraulic actuators at the time of activating the hydraulic actuators; and a second load pressure flow passage which is a flow path for introducing the load pressures of the hydraulic actuators to be outputted to said PLS transmission line during operation after activations of the hydraulic actuators, and wherein a flow rate of the pressure oil therein is reduced lower than that in said first load pressure flow passage. |
地址 |
Osaka JP |