Bearing structures for a motor rotor

A rotational supporting structure for a motor rotor, comprising:

• an axle tube having an inner periphery;
• a shaft;
• and
• at least two bearings each including an outer wall tightly engaged to the inner periphery of the axle tube, each said bearing further including an inner wall defining an axle hole for pivotally supporting the shaft, a connecting member being interconnected between the inner wall and the outer wall, at least one annular groove being defined between the inner wall and the outer wall, a longitudinal length of the axle hole being longer than that of the connecting member.

A bearing structure for a motor rotor, the bearing structure comprising:

• a bearing with a cylindrical axle hole extending therethrough to form an inner periphery of the axle hole, the axle hole of the bearing adapted to pivotally support a shaft of a motor rotor;
• the bearing comprising a rim on an outer periphery thereof the rim including an engaging portion extending outwardly from the rim, the engaging portion adapted to be engaged onto an inner periphery of an axle tube;
• wherein a longitudinal length of the axle hole is longer than that of the engaging portion;
• and
• wherein upon rotation of a shaft of a motor rotor, deformation of the inner periphery of the bearing occurs in a part of the bearing, substantially opposite the rim of the bearing.

A rotational supporting structure for a motor rotor, comprising:

• an axle tube having an inner periphery;
• a shaft of a motor rotor;
• at least two bearings each with a cylindrical axle hole extending therethrough to form an inner periphery thereof,
• the at least two bearings each including a rim formed on outer periphery thereof, the rims each including an engaging portion that extends outwardly from respective one of the rims, the engaging portion being tightly engaged to the inner periphery of the axle tube;
• each of the bearings comprising an axle hole for pivotally supporting the axle tube;
• a longitudinal length of the axle hole being longer than that of the engaging portion;
• and
• wherein, upon rotation of the shaft of the motor rotor, deformation of the inner periphery of the bearing occurs in a part of the bearing substantially opposite the rim of the bearing.