| 摘要 |
<p>Apparatus for varying the speed of rotation of a driven shaft (1a) for actuating rotating devices (1) of servo systems, in particular for vehicles, comprising an actuating shaft (2a) and a driven shaft (1a), wherein said actuating shaft (2a) and driven shaft (1a) have, arranged between them, a friction clutch (10;110), engagement/disengagement of which is performed by associated actuating means (30) controlled by means for detecting the speed of the actuating shaft (2a), so as to produce a first speed of rotation of the driven shaft, and a freewheel device (20; 120) able to produce a second speed of rotation of the driven shaft (1a), lower than the first speed. <IMAGE></p> |
