| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a small-sized and lightweight power transmission device capable of suppressing power consumption and heat generation, and preventing a response delay and a shock at the time of power transmission. <P>SOLUTION: When an outer ring 3 is rotated in the advancing direction of a vehicle 100 by a first sprag 5 in which an engagement surface 5b is contacted with an inner peripheral surface 3a of the outer ring 3 rotated by driving force of an electric motor 106, the first sprag 5 is tilted by frictional force generated at a contact point between an inner peripheral surface 3a and the engagement surface 5b, and the engagement surfaces 5a, 5b of the first sprag 5 are engaged with the inner ring 2 and the outer ring 3. Thereby, relative rotation between the inner ring 2 and the outer ring 3 are restricted to transmit the driving force. Since a conventional electromagnet and an electromagnetic coil are not necessary, the power transmission device 1 can be made small-sized and lightweight, so that power consumption and heat generation can be suppressed. Furthermore, the response delay can be prevented, and the shock can be prevented at the time of power transmission. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
