| 摘要 |
The invention relates to a planetary gear, comprising a gear casing (2), a first shaft (6) and a second shaft (12), which is located coaxially opposite to the first, a ring gear (8), a sun wheel (7), which is rotationally fixed to the first shaft, a planet carrier (13), which forms a rotationally mounted structural unit with the second shaft, and several stepped planetary gears (16, 17), which are rotationally mounted in the planet carrier. Said stepped planetary gears each consist of two connected planet wheels with differentsized effective diameters, the larger planet wheels (16) meshing with the sun wheel and smaller ones with the ring gear (17). Each planet wheel is configured as a separate unit and is rotationally mounted in the planet carrier with at least one highly resistant rolling bearing (25, 26) on both sides. The two planet wheels of each stepped planetary gear are coupled by an additional shaft (22) in a torsion-resistant manner, the shaft engaging with each planet wheel in a peripheral direction with a positive fit.
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