| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a shift driving device capable of putting a gear into a lower speed gear, even when failure is caused in a clutch of an electric actuator. <P>SOLUTION: The electric actuator 21 has a reciprocally rotatable single electric motor 23. A shifting electromagnetic clutch 43 is interposed between an electric motor 23 and a shift converting mechanism 24. A selecting electromagnetic clutch 45 is interposed between the electric motor 23 and a select driving mechanism 25. An axial directional moving distance X<SB POS="POST">a</SB>of a shift select shaft 15 per unit rotation of the electric motor 23 in select operation, is set larger than a moving distance X<SB POS="POST">b</SB>of the other end part 16b of an internal lever 16 per the unit rotation of the electric motor 23 in shift operation. When clutch failure is caused, while rotatingly driving the electric motor 23 in the first rotational direction R11, both the shifting and selecting electromagnetic clutches 43 and 45 are respectively put in a connecting state. <P>COPYRIGHT: (C)2013,JPO&INPIT |
