| 摘要 |
PROBLEM TO BE SOLVED: To provide a test method capable of inspecting a generation state of smearing, while operating radial needle bearings 6, 6 used actually. SOLUTION: The radial needle bearings 6, 6 are arranged around planetary shafts 1, 1 constituting a carrier 11 rotating around the first driving shaft 8. The carrier 11 is rotated by the first driving shaft 8, and thereby a radial load, corresponding to a centrifugal force applied to each planetary gear 2, 2, is loaded onto each radial needle bearing 6, 6. Simultaneously, a sun gear 18 is rotated by the second driving shaft 9, and each planetary gear 2, 2 provided around each planetary shaft 1, 1 is rotated. The radial load is adjusted appropriately by the rotational speed of the first driving shaft 8, and smearing is reproduced. COPYRIGHT: (C)2008,JPO&INPIT
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