摘要 |
A planetary gear mechanism which includes a sun gear having an introduction passage and a communication passage for communicating the introduction passage and an outside of the sun gear, a ring gear, a plurality of pinion gears geared with the sun gear and the ring gear, a plurality of pinion pins rotatable relative to the pinion gears, a carrier having a penetration bore inserted with the pinion pin for supporting the pinion pins so that the pinion gears rotate about the sun gear, a washer provided between the pinion gear and the carrier being inserted with the pinion pin, a slit formed on the carrier formed radially inward relative to the penetration bore, the slit being formed facing the washer, a restriction portion formed on the washer, and an extension portion formed on the washer and extended radially inward relative to a tooth flank of the pinion gear.
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