| 摘要 |
The invention relates to a linear actuation device for a control member (1), particularly a valve tappet (1) in a gas or liquid conduit (2), the device including a rotor (7) with an inner screwthread (10) whose rotary movement is convertible into a linear movement of a threaded spindle (5) which is locked against rotation and which is engageable with the inner screwthread (10). In order to achieve that such a device can be realized simply, cheaply and with a high resolution of the linear movement of the control member, the rotor (7) comprises a magnetized rotary body (8) which cooperates with a single-strand electrically energizable stator (13), the angular position of the rotor (7) being adjustable by means of the stator current and the maximum angular rotation of the rotor (7) being smaller than 180 DEG .
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