Patent ID: 7008169

Claim:
A structure of a work machine having a plurality of drive parts which are individually driven and controlled with hydraulic pressure, comprising: a base; a boom bracket horizontally rotatably mounted on the base; a boom serving as one of the drive parts, the boom being vertically rotatably attached on the boom bracket; a pivot pin vertically penetrating the base and the boom bracket so that the base and the boom bracket are tightened thereon while the base and boom bracket being horizontally rotatable with respect to each other; hydraulic actuators for driving the respective drive parts; a hose guide member fixed to an upper end portion of the pivot pin so that the hose guide member and the boom bracket can be integrally rotated horizontally with respect to the base, and operation oil hoses extended from the base for supplying operation oil to the hydraulic actuators, wherein the operation oil hoses are guided and piped to the inside of the boom via the hose guide member.