| 摘要 |
PURPOSE:To make a thick film lubricating state into perfection, by forming a concave-grooved lubricating passage, whose one end is opened and the other closed, in a slide bearing surface coming into sliding contact with a planetary roller of a varrier member in a direction of rotation in the planetary roller. CONSTITUTION:A concave-grooved lubricating passage 30 is formed on a slide bearing surface 20 coming into sliding contact with a planetary roller 12 of a carrier member 18 in a rotational direction of the planetary roller 12, while one end of the concave groove and the other end is closed. With this connection, lubricating oil to be taken in from the opening end is no longer drained flowing on the slide bearing surface 20 through the lubricating passage 30 so that the lubricating oil entered the lubricating passage 30 penetrates into a slide bearing part of the planetary roller formed by the slide bearing surface 20 even in time of a sliding contact state that an outer circumferential surface of the planetary roller 12 and the slide bearing surface 20 of the carrier member 18 come into contact with each other, thus the slide bearing part can be made into a complete thick film lubricating state.
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