Door closing device or door drive comprises a plunger positioned in a housing, an outer toothed arrangement interacting with a pinion and an involute toothed arrangement formed on the pinion and on the outer toothed arrangement

摘要

Door closing device (1) or door drive comprises a plunger (2) positioned in a housing (3), an outer toothed arrangement (6) interacting with a pinion (5) having a partial circle and an involute toothed arrangement formed on the pinion and on the outer toothed arrangement. The rotary axis of the pinion cuts into the inner surface of a housing wall (9) facing the open side of the plunger. Preferred Features: The housing wall receiving the rotary axis of the pinion is five times the thickness of the opposite housing wall in the region of the pinion.