Two-gear transmissions for electric machines with systems for controlling angular play

摘要

Two-gear transmissions for electric machines are provided, which include a primary shaft; a secondary shaft; a first gear set which includes a first driving gearwheel and a first driven gearwheel, one of these gearwheels including a first hub and a ring gear; a second gear set which includes a second driving gearwheel and a second driven gearwheel; an overrunning clutch interposed between the ring gear and the first hub; a first coupling device arranged to connect the ring gear for rotation directly with the respective shaft and comprises a second hub and a sliding sleeve; a second coupling device arranged to connect either the second driving gearwheel or the second driven gearwheel for rotation with the respective shaft; connection elements connecting the first hub for rotation with the second hub; and elastic elements applying on the first and second hubs a biasing torque to urge them towards an end-of-travel position.