Siemens Aktiengesellschaft

Alfred Kummel

Peter Michel

Wolfram Knappe

For a reliable moisture-tight seal at the separation point between a motor housing and a gear housing with a drive shaft of the motor projecting into the gear housing as a helical shaft and its mounting (cup bearing) in the region of the separation point, the cup bearing has a double-lip seal in the sense of a complete moisture seal of the motor housing relative to the gear housing assigned to it. An outside seal of the gear housing is thus eliminated. In order to be able to guarantee long maintenance-free operating lifetimes in spite of penetration of moisture into the gear housing part, the worm wheel which meshes with the helical shaft made of steel, which projects into the gear housing part, consists of POM plastic with lubrication-modified POM plastic added in a certain mixture ratio.

Motor vehicle gear motor drive

In a gear arrangement whose output shaft (5) is rotatably mounted in a gear box (6) and which corotates by means of a dog plate (3) via an axially interposed cushioning disk (2) with a gear (4) driven by a worm shaft (7) and, further, which output shaft is axially supported directly and/or indirectly, via the cushioning disk (2) and the gear (4), by the gear box (6), it is intended to provide, despite design related axial length tolerances, a tolerance play compensation in a manner which is considerably simplified from a production and assembly engineering viewpoint. Towards this end, the elastic cushioning disk (2) is provided with axially projecting spring lips (21 to 23), distributed over its circumference, for the development of a defined preloading pressure upon the components supported by the gear box (6).

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Kitzingen, Germany

Alfred Kummel