| 摘要 |
An actuator (1) comprises a housing (2) with a motor (5), an actuating member (19) and a screw mechanism (7) having a nut (10) and a screw (14), said screw mechanism providing a linear movement of the actuating member with respect to the housing in response to a rotational movement delivered by the motor, as well as reduction gear means (6) between the motor and the screw mechanism. The nut is fixed with respect to the housing, and the actuating member has a bore (21) which is provided with an internal screw thread (22), the screw engaging both the internal screw thread of the actuating member and the internal screw thread (7) of the nut.
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