Patent No. EP4189266 (titled "Integrated Design Of A Sun Shaft") was filed by ZF Friedrichshafen on Jun 28, 2021. The application was issued on May 28, 2025.
A wind-turbine transmission comprises a first planetary stage (101) and a second planetary stage (103). A sun gear (101d) of the first stage and a planet carrier (103b) of the second stage are rotationally conjoint via a spline toothing (113). The sun gear (101d) forms an integral inner toothing. An integral outer toothing of the spline (113) is formed by a first side piece of the planet carrier (103b) or a sun shaft (111) integrally connected thereto, where the outer toothing and the entire planet carrier (103b) consist of one piece. The planet carrier (103b) is mounted by exactly one bearing arrangement (119), which is joined exclusively to a second side piece of the planet carrier (103b).

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