| 摘要 |
PROBLEM TO BE SOLVED: To always retain a speed controllability of a good hydraulic actuator in consideration to a load variation against the hydraulic actuator connected to a hydraulic pump driven by an electric motor. SOLUTION: This working machine is provided with a hydraulic pump 16 driven by an electric motor 15; a hydraulic actuator 18 operated by the hydraulic pump 16; detection means 60, 61 for detecting a load circumstance of the hydraulic actuator 18; and restriction means 62, 63 for restricting an operation fluid state at a side returned from the hydraulic actuator 18 to the hydraulic pump 16 corresponding to the load circumstance such as a reverse load detected by the detection means 60, 61. |
