| 摘要 |
In an actuator, a quick release unit is introduced in a transmission between an activating element and a reversible electric motor for disengaging the activating element ( 5 ) from the electric motor and the part of the transmission ( 6 ) which is disposed from the motor to the quick release unit. This quick release unit comprises two cylindrical coupling parts ( 8, 9 ) provided with axially extending and mutually engaging torque-transferring means ( 21 a , 21 b), and where the two coupling parts ( 8, 9 ) are mutually axially displaceable and kept in engagement with each other by a spring ( 25 ). The two coupling parts may be displaced mutually against the spring ( 25 ) by a release mechanism, so that the torque-transferring connection ( 21 a , 21 b) between the two coupling parts ( 8, 9 ) is interrupted. The quick release unit may be made compact, and especially in connection with a worm wheel ( 6 ) with a cylindrical part on the side it may be substantially received in the cylindrical part.
|
