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US 2013/0278116 A1Published application
Brushless dc motor
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsJin Sun Min, Young Sun Yoo
Life of this patent
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Abstract
Disclosed herein is a brushless DC motor that ensures stable driving of a shaft that rotates in a hollow of a bearing by using a bearing with a flat bottom surface and a tapered top. A contact height between an inner peripheral surface of the bearing and an outer peripheral surface of the shaft is larger than a contact height between an outer peripheral surface of the bearing and an inner peripheral surface of a bearing holder.
Claims17
A brushless DC motor, comprising:
- a shaft;
- a bearing having a hollow cylindrical shape to rotatably support the shaft and including a taper on the top thereof;
- a bearing holder having the hollow cylindrical shape to support the bearing;
- a base fixing the bearing holder;
- a rotor including a hub and a magnet;
- and
- a stator including a core and a plurality of coils wound on the core and fixed to an outer peripheral surface of the bearing holder.
4 more elements
A brushless DC motor, comprising:
- a shaft;
- a bearing having a hollow cylindrical shape to rotatably support the shaft and including a taper on the top thereof;
- a bearing holder having the hollow cylindrical shape to support the bearing;
- a base fixing the bearing holder;
- a rotor including a magnet and a hub with a step portion on the bottom surface thereof;
- and
- a stator including a core and a plurality of coils wound on the core and fixed to an outer peripheral surface of the bearing holder.
4 more elements
Dependencies are inferred from the claim text.