Planetary gear for variable transmission

摘要

The invention relates to a planetary gear (1, 20, 30, 40) for variable transmission, particularly a planetary gear for variable transmission towards a tail rotor of a helicopter. At least one gear set (s1, s2, s3, s4) of a sun gear (w4, w6, 21) comprises a ring gear (w1, w7), planetary wheels (2, 22, 32) and a planet carrier (w2, w3, w8). At least one clutch (k, K1, K2) and at least one freewheel (Fl, FL1, FL2) are provided for at least two different speeds of the planet carrier (w2, w3, w8) as output.