To reduce a power loss in a hydraulic oil supply path to hydraulic cylinders and a hydraulic motor and improve the response of a crushing arm in a work machine including a crusher having, at the front end of a working arm supported by a frame body, a crushing arm, hydraulic cylinders for opening and closing the crushing arm, and a hydraulic motor for rotating the crushing arm relative to the working arm.
A drive circuit A for cylinders 20A, 20B for opening and closing and a drive circuit B for a motor 17 for swing, and a hydraulic pressure source C for dedicated use of a crusher which supplies pressure oil to the drive circuits A, B are unitized as a crusher drive device 24 and mounted on a working arm 5.
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MIYATA NAOKI
AWANO KATSUSUKE
MATOBA NOBUAKI
Suzuki Yuko
Naozumi Ono
Sachiko Okunuki