WORK ATTACHMENT AND CONSTRUCTION MACHINE PROVIDED THEREWITH

摘要

PROBLEM TO BE SOLVED: To reduce noise generated due to a gap in the coupling pin radial direction between a coupling pin and two components coupled thereby.SOLUTION: An arm 6 and a bucket 7 of a work attachment 4 are coupled by a coupling pin 20 that is inserted through boss parts 7b and 15 so that they can relatively rotate about the coupling pin 20. The work attachment 4 is provided with leaf springs 11 to give a spring force in the radial direction of the coupling pin 20. The peripheral wall of the boss part 15 has storage holes 15d communicated with the inside of a pin hole. The leaf springs 11 are inserted in the storage holes 15d and contact with a part of the outer periphery of the coupling pin 20.