Title:
WORK MACHINE
Document Type and Number:
Japanese Patent JP2023151006
Kind Code:
A
Abstract:
To provide a work machine capable of preventing the occurrence of cavitation while realizing speed control of a hydraulic actuator according to an operation of an operating device.SOLUTION: A control device 80 of a work machine calculates a target speed Vt of fluid pressure actuators 20 and 21 in response to an operating signal from an operating device 6, calculates target thrust force Ft or target torque of the fluid pressure actuators 20 and 21 based on the driving states of the fluid pressure actuators 20 and 21, controls the speeds of the fluid pressure actuators 20 and 21 using meter-out control valves 35 and 37 based on the operating signals from the operating device 6 if positive and negative of the target speed Vt of the calculation result is different from the positive and negative of the target thrust Ft or target torque of the calculation result, and controls at least one of a pump 31 and meter-in control valves 34 and 36 so that the pressure on the meter-in side of the fluid pressure actuators 20 and 21 is equal to or higher than a predetermined value.SELECTED DRAWING: Figure 6
Inventors:
AMANO HIROAKI
KUMAGAI KENTO
NISHIKAWA SHINJI
NARASAKI AKIHIRO
KUMAGAI KENTO
NISHIKAWA SHINJI
NARASAKI AKIHIRO
Application Number:
JP2022060391A
Publication Date:
October 16, 2023
Filing Date:
March 31, 2022
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
E02F9/22; E02F9/20; F15B11/02; F15B11/028; F15B11/044
Attorney, Agent or Firm:
Patent Attorney Corporation Kaichi
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