Axial coupling for positional drive for controlling armatures in process automation

摘要

The positional drive (10) with the armature (20) is statically connected via a distance piece (30) between the drive housing (11) and the armature body (21) and is dynamically connected via the axial coupling (40). The coupling maintains a shape-locking connection between the drive and the switching rod (220) of the control element (22) under normal conditions when supplied with auxiliary power. If the power supply fails, the shape-locking connection is released by switching off the auxiliary power. A pressure plate (44) is operated by an electromagnet.