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HYDRAULIC DRIVE DEVICE FOR OPERATING MACHINE
Provided is a hydraulic drive apparatus capable of automatic control with high accuracy regardless of execution of regeneration operation. The hydraulic drive apparatus includes a boom flow rate control valve (36), an arm flow rate control valve (37), a regeneration control valve (43) having a variable regeneration rate for the arm cylinder (27), a pump control device for performing horsepower control, a posture detection device (60), a boom flow rate control device (76,100) switchable between a normal control mode and an automatic control mode, and a regeneration control device (93,100). The boom flow rate control device (76,100) adjusts the boom flow rate in the automatic control mode so that a work attachment moves along a target locus. The regeneration control device (93,100) sets the regeneration control valve (43) to a regeneration position in a low load situation and to a regeneration cut position in a high load situation, and lowers the regeneration rate in the low load situation when the boom flow rate control device is switched to the automatic control mode.
HYDRAULIC DRIVE DEVICE FOR OPERATING MACHINE
Provided is a hydraulic drive apparatus capable of automatic control with high accuracy regardless of execution of regeneration operation. The hydraulic drive apparatus includes a boom flow rate control valve (36), an arm flow rate control valve (37), a regeneration control valve (43) having a variable regeneration rate for the arm cylinder (27), a pump control device for performing horsepower control, a posture detection device (60), a boom flow rate control device (76,100) switchable between a normal control mode and an automatic control mode, and a regeneration control device (93,100). The boom flow rate control device (76,100) adjusts the boom flow rate in the automatic control mode so that a work attachment moves along a target locus. The regeneration control device (93,100) sets the regeneration control valve (43) to a regeneration position in a low load situation and to a regeneration cut position in a high load situation, and lowers the regeneration rate in the low load situation when the boom flow rate control device is switched to the automatic control mode.
HYDRAULIC DRIVE DEVICE FOR OPERATING MACHINE
HYDRAULISCHE ANTRIEBSVORRICHTUNG FÜR EINE ARBEITSMASCHINE
DISPOSITIF D'ENTRAÎNEMENT HYDRAULIQUE POUR ENGIN DE CHANTIER
MAEKAWA SATOSHI (author) / KAWAI HIROAKI (author) / KAMIMURA YUSUKE (author)
2021-02-17
Patent
Electronic Resource
English
IPC:
E02F
Baggern
,
DREDGING
HYDRAULIC DRIVE DEVICE OF ELECTRIC-POWERED HYDRAULIC OPERATING MACHINE
| European Patent Office | 2024