POWER ACTUATOR DRIVING CONTROL DEVICE OF HYDRAULIC WORKING MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a power actuator driving control device of a hydraulic working machine which can easily adds to compact construction machines such as a mini-shovel, a high function such as automatic excavation and working area control, and can make the drive of a power actuator finely follow the operation of an operation lever despite the increase in working load. SOLUTION: The power actuator driving control device of a hydraulic working machine is equipped with a direction control valve (38x) for controlling supply/discharge of pressure oil with respect to a power actuator (36x), a direct acting valve actuator (56) for switching and actuating the direction control valve (38x), a lever unit (74) for converting the control input of an operation lever (76) into an electric control input signal SLfor outputting and a controller (72) for generating a drive signal SDto the valve actuator (56) on the basis of the control input signal SLfrom the lever unit (74). COPYRIGHT: (C)2008,JPO&INPIT