Electric motor, has set of notches provided at outer circumference of shaft section, where distance of pair of adjacent notches is more or equal to inner diameter and is less than outer diameter of shaft

摘要

The motor has a hollow shaft (20) with a shaft section having predetermined inner diameter and outer diameter. A set of notches runs in longitudinal direction of the hollow shaft, where the notches are provided at the outer circumference of the shaft section. The distance of a pair of adjacent notches is more or equal to the inner diameter and is less than the outer diameter, where one of the notches has a section that runs perpendicular to a plane running through the notches.