Bearing structure for rotor of motor, has coupling section formed at outside perimeter, in which longitudinal length of axis hole is larger than that of coupling section

摘要

The bearing structure includes an axis hole supporting a revolving shaft (11) of the rotor of a motor, and a coupling section (23) formed at its outside perimeter (22), which borders on the inside of an axis hole (10). The longitudinal length of the axis hole is larger than that of the coupling section. The coupling section comprises preferably at least one groove (24) extending in the longitudinal direction. The coupling section is preferably arranged in the middle of the outside perimeter of the bearing structure.