| 摘要 |
Disclosed is an actuator (11) for electromotively actuating the braking mechanism (22) of a parking brake, especially in a motor vehicle. In order to operate said actuator at low noise even at a high motor speed, the motor (12) of said actuator (11) is provided with a speed reducing element comprising a pinion that preferably has only two teeth and permanently engages with the helical teeth (18) of an intermediate gear (19) as a result of the ribbed shape of the teeth of the pinion, which wind around the pinion shaft (16). The intermediate gear (19), along with a spur toothed pinion (20), directly drives an output gear (21) encompassing the output shaft (14) of the actuator.
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