| 摘要 |
PROBLEM TO BE SOLVED: To provide a piping structure of the greasing pipes of a boom attached to a construction machine body which allows a worker to perform an efficient greasing operation on the ground. SOLUTION: In this piping structure of the greasing pipes, first to fifth greasing pipes 27, 37... for supplying grease to first to third pin joining parts 17, 19, 21 provided to the boom 15 of a hydraulic excavator longitudinally extend along the longitudinal direction of the boom 15. An arm is rotatably connected to the front end 15a of the boom 15, and the rear end 15b thereof is derrickably attached to the excavator body 3 of the hydraulic excavator 1. The first to fifth rear end greasing ports of the first to fifth greasing pipes 27, 37... which are provided to one ends thereof are connected to the first to third pin joining parts 17, 19, 21, respectively, and the first to fifth front end greasing ports provided to the other ends are collectively disposed at the front end 15a of the boom 15. COPYRIGHT: (C)2010,JPO&INPIT
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