掘削作業機械の油圧駆動装置

Japanese Patent JP7096105

B2

Provided is a hydraulic drive apparatus capable of controlling the movement of a boom with high accuracy according to the movement of an arm to make the construction surface by a bucket closer to a target construction surface. The hydraulic drive apparatus includes a boom flow rate control valve, a target boom cylinder speed calculation part calculating a target boom cylinder speed for making the construction surface by the bucket closer to the target construction surface based on the cylinder speed of the boom cylinder and the like, and a boom flow rate operation part. The boom flow rate operation part operates the boom flow rate control valve so as to make the boom cylinder supply flow rate be a target supply flow rate corresponding to the target boom cylinder speed when the direction of the target boom cylinder speed coincides with the direction of the cylinder thrust, and operates the boom flow rate control valve so as to make the boom cylinder discharge flow rate be a target discharge flow rate corresponding to the target boom cylinder speed when the direction of the target boom cylinder speed is opposite to the direction of the cylinder thrust.

Satoshi Maekawa
Toshihiro Nogi
Sho Fujihara

JP2018156096A

July 05, 2022

August 23, 2018

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KABUSHIKI KAISHA KOBE SEIKO SHO
Kobelco Construction Machinery Co., Ltd.

E02F9/20; E02F9/22

JP10219727A
JP2015206415A
JP2018053675A
JP5321297A
JP2016205495A

WO2018051511A1
WO2016056678A1
US20180172037

Etsushi Kotani
Masataka Kotani
Toshiro Muramatsu

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