| 摘要 |
PROBLEM TO BE SOLVED: To provide a work machine which includes a load sensing system including a variable displacement hydraulic pump for supplying pressure oil to a plurality of hydraulic actuators, and a PLS transmission line for transmitting the highest one of load pressures of the hydraulic actuators, for controlling the discharge pressure of the hydraulic pump to keep a pressure obtained by subtracting the highest one of the load pressures of the hydraulic actuators from the discharge pressure of the hydraulic pump, constant, and which can develop quick responsiveness at starting the hydraulic actuators and enhance body stability during the operation thereof after started.SOLUTION: In the work machine, a first load pressure distribution passage 77 and a second load pressure distribution passage 78 are provided which introduces load pressures of hydraulic actuators C2-C5 and outputting them to a PLS transmission line 44 at starting the hydraulic actuators C2-C5, and which is a flow path for introducing the load pressures of the hydraulic actuators C2-C5 and outputting them to the PLS transmission line 44 during the operation of the hydraulic actuators C2-C5 after started and has a less pressure oil distribution amount than the first load pressure distribution passage 77, respectively. |
