| 摘要 |
Method and arrangement for providing a range gearbox with planetary gear ( 1 ) for motor vehicles, intended to be connected to the output side of a basic gearbox. The ring gear ( 18 ) of the planetary gear is axially displaceable. The ring gear ( 18 ) can engage coupling rings ( 10, 16 ) alternatively. A synchronizing means ( 15 ) is intended to synchronize the rotational speed difference between the ring gear ( 18 ) and at least the coupling ring ( 16 ). The synchronizing means ( 15 ) and the coupling ring ( 16 ) are arranged coaxially outside the ring gear ( 18 ). A second means ( 25 ) for engaging the coupling ring ( 16 ) and a third means ( 25, 25 b) for driving the synchronizing means ( 15 ) are arranged on the external side, seen radially, of the ring gear ( 18 ), and the synchronizing means ( 15 ) is arranged between the coupling ring ( 16 ) and the first means ( 27 ) for axial displacement of the ring gear ( 18 ).
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