TRANSMISSION UNIT COMPRISING COUPLED PLANETARY GEAR STAGES

摘要

The invention relates to a transmission unit (1), in particular for a wind turbine, said unit comprising a first planetary gear stage (2) on the input side, a second planetary gear stage (3) and a third planetary gear stage (4) on the output side, each gear stage having a central sun gear (5; 6; 7), a ring gear (14; 15; 16) surrounding the sun gear and planetary gears (11; 12; 13) situated radially between the sun gear and ring gear, said planetary gears being rotatably mounted in a planetary carrier (8; 9; 10). The gear stages are coupled together using means, which can rotate about a rotational axis oriented in the longitudinal direction of the transmission unit (1), in such a way that the input speed of the transmission unit (1) can be increased on the output side. According to the invention, the means for coupling the first and second planetary gear stages (2; 3) comprise an output connection (21) which couples the sun gear (6) or the ring gear (15) of the second planetary gear stage (3) to the planetary carrier (10) or the ring gear (16) of the third planetary gear stage (4) in a rotationally fixed manner.