HYDRAULIC PRESSURE TRANSMISSION MECHANISM OF DEEP-EXCAVATING MACHINE

摘要

PURPOSE: To enable pressure oil to be supplied without use of a hydraulic hose between the head and rear end of plural stages of arms combined into a telescopic form. CONSTITUTION: An expansion unit 35 and an oil feeding unit 36 are enclosed inside an expansion arm 28, and one cylinder rod 43 of the expansion unit 35 and one sliding pipe 47 of the oil feeding unit 36 are connected to a root boom 16. The other cylinder rod 44 of the expansion unit 35 and the other sliding pipe 48 of the oil feeding unit 36 are connected to an end boom 20. Pressure oil is supplied via the cylinder rods 43, 44 and the sliding pipes 47, 48 to a hydraulic drive mechanism connected to the end boom 20.