| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently air-cool not only an electric motor but also a wave generator 63 of a speed reducer and avoid an increase in the axial length of an electric actuator, in the electric actuator composed of the electric motor 5 and a wave gear speed reducer 6 connected to the electric motor. <P>SOLUTION: The wave generator 63 is formed with a plurality of holes 63c penetrating in the axial direction at an interval in the circumferential direction, and is formed by constituting a vane portion 63d blowing air in the axial direction by a partitioning portion between these respective holes 63c and 63c. An internal space for disposing a coil of the electric motor 5 is in communication with an internal space of the seed reducer 6, and the vane portion 63d blows air into the internal space of the electric motor 5. An air cooling passage 57 is formed in a stator of the electric motor 5 such that air flows into the air cooling passage 57 when the vane portion 63d blows air. <P>COPYRIGHT: (C)2009,JPO&INPIT |
