Patent attributes
Range gearbox for motor vehicles adapted to be connected to the output side of a basic gearbox and including planetary gear (7), enclosed in a housing (3), with a sun wheel (9) arranged on an input shaft (5) and engaged with planet wheels (10). The ring gear (14) is selectively lockable in order to establish gearing between the input shaft and the output shaft. Interacting tooth faces of the planetary gear (7) are angled in such a manner in relation to the longitudinal axis of the input shaft (5) and the output shaft (8) so that an axial force arises on the ring gear (14) from gear speed changes during synchronizing, and this force, at least on shifting to the low range position, tends to move the ring gear in the same direction as an external shifting force.
