| 摘要 |
PROBLEM TO BE SOLVED: To form a lubrication pathway for a roller bearing in a power transmission device at low cost. SOLUTION: A planetary shaft 4 is composed of two piece structure of a spline shaft 12 and a sleeve 13, a space 14 and a notch 15 as an intermediate passage, and an oil supply hole 18 are provided as the lubrication pathway for the needle roller bearing 5. Since an intermediate passage of the lubrication pathway is secured with using spline grooves 12b, just arrangement of notch 15 is required as processing of the spline shaft 12 and drilling of a center of solid shaft body which is required in a conventional example is not required. Consequently, processing of chip is not required. COPYRIGHT: (C)2004,JPO
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