| 摘要 |
1. A positioning device for closing and regulating armatures, especially valves and cocks, with a drive motor (2) which is connected with a drive spindle (7, 48, 70) through a drive mechanism (3, 4, 5, 6, 47, 69) and having an overload safety device against unwanted forces on the drive spindle, having the drive gear (6, 47, 69) arranged coaxial with the drive spindle and being supported on both sides by at least one spring element (14, 15) for axial sliding movement relative to housing parts (13, 16) and having a switch device for the drive motor, the switching device including a switch (42) arranged in the housing and which switch is connected with the drive gear (6, 47, 69) through an operating member (36), characterized in that the spring elements are formed as Orings (14, 15) and in that the operating member (36) conveys the axial movement of the drive gear (6, 47, 69) without further transmission elements to the switch (42). |
