Motor
First Claim
1. A motor comprising a shaft member;
- a rotor rotatably mounted on said shaft member through the intermediary of a pair of bearing means;
a yoke mounted on an inner circumferential surface of said rotor;
a rotor magnet fixed on a inner circumferential surface of said yoke;
a stator facing said rotor magnet;
a bushing placed between one part of the pair of said bearing means and said yoke, one end portion of said bushing having a somewhat larger outer diameter than that of the other end portion of said bushing;
one end portion of said yoke having a somewhat larger inner diameter than that of a middle portion of said yoke, whereby said one end portion of said bushing and said middle portion of said yoke are secured together.
1 Assignment
0 Petitions
Accused Products
Abstract
A spindle motor includes a housing, a shaft member fixed in the housing, a rotor rotatably supported on the shaft member, a rotor magnet mounted on the rotor, and a stator placed facing with the rotor magnet. The housing and the shaft member are made of materials different in hardness and a sleeve having substantially the same level of hardness as the shaft member is placed between the housing and the shaft member. A bushing is provided between bearing members and the rotor which is rotatably supported by the bearing members. The bushing and a yoke which is mounted on the rotor are secured together in the axial middle part of the bushing. In addition, through holes which enable communications between the interior and exterior area of the motor are provided in the bushing.
19 Citations
9 Claims
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1. A motor comprising a shaft member;
- a rotor rotatably mounted on said shaft member through the intermediary of a pair of bearing means;
a yoke mounted on an inner circumferential surface of said rotor;
a rotor magnet fixed on a inner circumferential surface of said yoke;
a stator facing said rotor magnet;
a bushing placed between one part of the pair of said bearing means and said yoke, one end portion of said bushing having a somewhat larger outer diameter than that of the other end portion of said bushing;
one end portion of said yoke having a somewhat larger inner diameter than that of a middle portion of said yoke, whereby said one end portion of said bushing and said middle portion of said yoke are secured together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a rotor rotatably mounted on said shaft member through the intermediary of a pair of bearing means;
Specification