| 摘要 |
<p>EP--93045 A The two-speed belt drive transmission for a vehicle engine accessory has a rotatably driving shaft (12) and a pair of coaxial rotary driven discs (16,18).A clutch is selectively shiftable from a first condition coupling one of the driven discs to the drive, to a second condition coupling the other. - The clutch (34) has a first axially movable section (42) mounted for rotation with the shaft and resiliently urged into frictional engagement with one driven disc. It has a second axially movable section mounted for rotation with the other. An actuator (48) moves the second section into engagement with the first. (1/1) USAB- US4482038 A The double acting drive mechanism (10) includes a driving member (12) and a pair of driven members (16,18) which carry a small dia. (24) and a larger dia. pulley face (26) respectively. A clutch mechanism (34) normally couples one of the driven members for rotation with the driving member, and the other driven member freewheels. - Upon energization of an electromagnetic actuator, the armature (56) - which rotates with the other driven member (18) - engages the clutch mechanism to couple the other driven member for rotation with the driving member. Engagement of the armature with the clutch mechanism disengages the clutch mechanism from the one drive member (16). (4pp)</p> |
