Commutation device for transmitting current to armature of starter motor, has brush springs acted upon by force in collector direction such that two spring-brush units have brush and brush spring differing in their resonance frequency

The commutation device (17) comprises an armature-side collector (22). The casing surface of the armature-side collector is distributed with several brushes (20) around the circumference. Several brush springs (21) are acted upon by force in the direction of the armature-side collector, such that at least two spring-brush units (19) have a brush and a brush spring which differ in their resonance frequency. Eine Kommutierungseinrichtung zur Stromübertragung weist einen ankerseitigen Kollektor auf, an dessen Mantelfläche über den Umfang verteilt mehrere Bürsten anliegen, die von jeweils einer Bürstenfeder in Richtung auf den Kollektor kraftbeaufschlagt sind. Mindestens zwei Feder-Bürste-Einheiten, die jeweils eine Bürste und eine Bürstenfeder umfassen, unterscheiden sich in ihrer Resonanzfrequenz.