Adjustment unit for an air flap in a motor vehicle's ventilation, heating or air-conditioning equipment, has an electric drive motor and transfer gearing with a drive wheel linked to the flap

摘要

An electric drive motor is designed as an electronically commutated external rotor motor (12). Two-step transfer gearing (13) has a double gearwheel (15) with two gearwheels (151) fitted with different numbers of teeth and interlinked in a torque-proof manner. Gearwheels with larger and smaller numbers of teeth engage with a motor pinion gear (16) and a drive wheel (14).