| 摘要 |
The invention relates to a reduction gear for a starter-generator of an internal combustion engine, said starter-generator being functionally linked with the crankshaft (2) via a belt drive (6). A planetary gear is mounted in the force-transmitting path between the crankshaft (2) and a first belt pulley (6) that is coaxial to the crankshaft. The aim of the invention is to create a reduction gear which provides the gear ratio required for the starting mode and which can be switched in such a manner that it can be operated in any mode of operation. To this end, the reduction gear (8) is a planetary stage that consists of a housing (10), an internal geared wheel (11), a sun wheel (14), a cage (15) and a planetary ring (16) with internal (18) and external (17) toothing. The internal geared wheel intermeshes with the outer toothing (17) of the planetary ring (16) and is functionally linked with the crankshaft (2) of the internal combustion engine. The sun wheel (14) intermeshes with the internal toothing (18) of the planetary ring (16) and is stationarily linked with the housing (10) via a first coupling (19). The cage (15) is provided with eccentric bearings (42, 43) for the planetary ring (16) and is stationarily linked with the first belt pulley (7). The cage can be stationarily linked with one of the members (11) of the planetary stage via a second coupling (20).
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