| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a device as a whole in a state in which an allowable rotating frequency is not exceeded in a driving source of an input rotating shaft even in the reversed input from an output rotating shaft to the input rotating shaft. SOLUTION: This power transmission device comprises an input system rotating member 11, an output system rotating member 12 mounted on a part of a planetary gear mechanism 13 for decelerating the rotation from the input system rotating member 11, a first one-way clutch 14 mounted between the input system rotating member 11 and the output system rotating member 12, and a second one-way clutch 15 mounted between a part of the planetary gear mechanism 13 and a static system member 17. The first one-way clutch 14 blocks the input of the rotation from the input system rotating member 11 to the output system rotating member 12 by disengaging a rolling element, and transmits the reversed input of rotation from the output system rotating member 12 to the input system rotating member 11 by engaging the rolling element. The second one-way clutch 15 is locked by the engagement of the rolling element when the rotation is input from the input system rotating member 11 to the output system rotating member 12, and unlocked by disengaging the rolling element when the rotation is reversely input from the output system rotating member 12 to the input system rotating member 11. COPYRIGHT: (C)2005,JPO&NCIPI
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