WORK MACHINE PIPING STRUCTURE OF EXCAVATION WORK VEHICLE

摘要

PROBLEM TO BE SOLVED: To protect hydraulic piping in an excavation work vehicle consisting of a first boom, a second boom attached to a tip part of the first boom so as to turn freely in the right and left directions, and a third boom attached to a tip part of the second boom so as to turn freely in the right and left directions and capable of being offset in the right and left directions. SOLUTION: Hose guides 52, 54 for protecting a hydraulic hose are provided on an end face of a boom offset support point pin 51 turning the first boom 10 and the second boom 11 and on an end face of a boom offset support point pin 53 turning the second boom 11 and the third boom 12, and the hose guides have ring-shaped hose passing through parts and are assembled in head parts of the support point pins.