| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the occurrence of improper bending operation of a working machine caused by intrusion and biting of sediment into a clearance caused by wear brought about by friction between an end wall 2a on an external end side of a bearing member 2 having a cylindrical shaft shape of a movable side working machine B and an end wall 1a on an inner side of a discoid bearing member 1 of a fixed side working machine A abutted against it. SOLUTION: In this connecting shaft part structure of the working machine in the power shovel, a metallic and cylindrical bearing 3 is fitted into an inner peripheral side of the bearing member 2 provided in the movable side working machine B to protrude an end face 3a on an external end side from the end wall 2a on the external end side of the bearing member 2, and a metallic and cylindrical bearing 7 is fitted into an inner peripheral side of a bearing member 1 provided in the fixed side working machine A to protrude an end face 7a on an external end side from the end wall 1a on the inner side of the bearing member 1, these bearing members 1, 2 are adjacent and oppose to each other and are supported on a connection pin p while these bearings 3, 7 fitted into them form a small clearance w between the end face 7a and the end face 3a, and a greasing hole 6 is provided in the bearing member 2. COPYRIGHT: (C)2009,JPO&INPIT
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