Self-propelled crushing machine of hydraulic drive system and self-propelled crushing machine

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic driving apparatus of a self-propelled crusher which retains a prescribed crushing capability of a crushing apparatus while miniaturizing a running means and to provide a self-propelled crusher.;SOLUTION: The hydraulic driving apparatus of a self-propelled crusher provided with right and left hydraulic motors 6R, 6L for driving by hydraulic power from hydraulic pumps 44A, 44B driven by an engine 43 and a hydraulic motor 15 for the self-propelled crusher comprises right and left control valves for driving and a control valve for the crusher for introducing the hydraulic power from the hydraulic pumps 44A, 44B into the right and left hydraulic motors 6R, 6L for driving and the hydraulic motor 15 for the self-propelled crusher, operation lever apparatuses 41R, 41L and an operation board 42 for switching and operating them, respectively, and a relief valve 57 for setting the relief pressure of the hydraulic pumps 44A, 44B. The relief pressure is increased by adding pilot pressure to the control valve for the crusher to a driving unit 85 through the pipe 86 at the time of crushing work.;COPYRIGHT: (C)2003,JPO