Gearbox for a wind turbine, a method of converting wind energy and use of a gearbox

A gearbox for a wind turbine, comprising:

• at least one first epicyclical gear stage including a first gear having a first axis of rotation that extends through the first gear,
• at least one second gear stage including a second gear having a second axis of rotation that extends through the second gear, and
• a torque transferring shaft comprising a shaft part, a connection part, and a central shaft axis about which the shaft rotates, wherein the torque transferring shaft is adapted for connecting the first gear of the first epicyclical gear stage with the second gear of the second gear stage, wherein the torque transferring shaft is connected to the second gear stage via the connection part to form a torque-transferring connection area between the connection part and the second gear stage, and wherein the first axis rotation, the second axis of rotation, and the shaft axis are aligned with each other,
• wherein an outer diameter of the shaft part of the torque transferring shaft is smaller than an inner diameter of the connection area between the torque transferring shaft and the second gear stage and wherein a flexure zone is established in the connection part between the shaft part and the connection area, and
• wherein the connection area substantially faces the first gear.