| 摘要 |
PROBLEM TO BE SOLVED: To reduce a design cost and a manufacturing cost, which are associated with greasing piping of a pin support structure.SOLUTION: An inside boss member 40 is provided with a greasing hole 42 and a chamfered part 43. The chamfered part 43 is configured to serve as an annular greasing passage 60 when a bucket hinge part 12 is assembled. A groove part 21 provided on an inner peripheral surface of an insertion hole 20 communicates with the greasing passage 60. |
