| 摘要 |
A direction-dependent driving coupling between the rotor of a permanent-magnet synchronous motor and a working part. The coupling comprises at least one first eccentric driving tooth and at least one cantilevered elastomeric element which are rigidly coupled to a first one of the two components between which motion is to be transmitted; the cantilevered element is arranged peripherally close to a cylindrical wall, of which it partially follows the shape, and the wall is formed by a housing, in which the rotor is arranged, and is motionless, at start-up, with respect to the motorized component. At least one second eccentric tooth is rigidly coupled to a second one of the two components between which motion is to be transmitted in such a position that the path between the parts causes it to interact with the first tooth in one direction and to interact with the cantilevered element in the opposite direction, producing a radial outward thrust which flexes the cantilevered element against the cylindrical wall, blocking it. |
