The invention relates to a multi-stage reduction gear by which at least
seven speeds can be shifted. Apart from the input shaft (1) and the output
shaft (2), the gear consists of a non-engageable upstream gear and an
engageable downstream gear in the form of a gear with two fixed links and
four shafts. The upstream gear consists of a first planetary gear (3)
which, next to the input RPM of the input shaft (1), also provides a
second RPM which can be shifted alternatively via a downstream gear. The
downstream gear consists of two engageable planetary gears (4, 5) which,
with of six shift elements (A to F), can generate a minimum of seven
forward speeds, whereby two output paths are formed (P, Q). Thereby,
series shifts are always avoided for each shift action.
