Adjusting drive for 2/3-way path valves has linear drive to drive engine adjusting rod, acting with valve adjusting rod, and two stops for rods with spring element tensioned between them

摘要

The drive has a synchronous motor (2) with linear drive to drive an engine adjusting rod (4.2). A clutch for power transmission to the adjusting rod during engine start-up, is located between hub and magnet of the motor. A valve adjusting rod (4.1) is in axial active connection with the engine adjusting rod. A first stop (11.2) is located outside the motor, but inside the housing (10), near the end of the engine adjusting rod, and a second stop (11.1) is located near the front end of the valve adjusting rod. A spring element (5) is tensioned positively between the stops. A spring (9) transmits a signal to trigger a switching process, dependent upon the movements of the adjusting rods.