| 摘要 |
PROBLEM TO BE SOLVED: To provide a power transmission device capable of preventing abnormal abrasion or the like of a fitting portion by using a flexible sealing member in a flange-shaped portion even if an outer diameter of a hub and a diameter of a pulley are different from each other. SOLUTION: The power transmission device 1 makes the pulley 2 and the hub 5 fitted into and connected to each other. In projections 22 located on the outer circumferential side than an outer hub 53 among projections 51c on the side of the hub 5 and those 22 on the side of the pulley 2, there is provided an annular dust flange 51d protruding in a broadening manner from a front portion adjacent to the projections 51c of an elastic portion 52 radially outside. The outer circumferential end of the dust flange 51d abuts elastically against a sealing portion 23 of the pulley 2 by elastic force of the elastic portion 52 to be attached firmly thereto, and thereby the front face of the projections 22 is completely covered. COPYRIGHT: (C)2009,JPO&INPIT
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