Control device for hydraulic cylinder and operating machine including control device

摘要

A control device includes an arm cylinder (11) having a cylinder body (17) and a piston (18) that slides inside the cylinder body (17) and a pump (25a,b) that supplies working oil to the arm cylinder (11), and decelerates the piston (18) when it approaches a stroke end of the arm cylinder (11) by adjusting a supply rate of the working oil supplied from the pump (25a,b) to the arm cylinder and a discharge rate of the working oil discharged from the arm cylinder. The position at which the piston starts decelerating is set further from the stroke end as the moving speed of the piston becomes higher.