Shaft system

A shaft system for transmitting a torque, the shaft system comprising:

• a first component configured to deliver torque from a drive shaft, said first component having an end section with a curved toothed structure,
• a first shaft connectable to the first component,
• a second shaft connectable to, and axial extendable relative to, the first shaft, said second shaft having a first end section with a toothed structure, wherein the second shaft has an outer facing surface comprising the toothed structure of the second shaft,
• wherein the first shaft comprises a toothed structure configured to mate with the toothed structure of the first component in a first coupling, and to mate with the toothed structure of the second shaft in a second coupling, such that in operation of the shaft system, torque is transferred from the first component to the second shaft via the first and second couplings and wherein the first shaft comprises a first end section configured to mate with the end section of the first component, and a second end section configured to mate with the first end section of the second shaft, wherein the toothed structure of the first shaft extends from the first end section to the second end section, wherein the second shaft comprises a second end section oppositely arranged with respect to the first end section of the second shaft, and the toothed structure of the second shaft extends from the first end section to the second end section of the second shaft;
• and
• wherein the torque is transferred between the first shaft and the second shaft solely via a coupling between the toothed structure of the first shaft and the toothed structure of the second shaft.