Motor having device for limiting direction of rotation
A motor having a reverse-rotation preventing unit, comprises: a casing; a stator fixedly-coupled to an inside of the casing; a primary rotor rotatably inserted into the stator; a motor shaft coupled to the primary rotor; a secondary rotor having a permanent magnet and rotatably inserted into an air...
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Main Author | |
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Format | Patent |
Language | English |
Published |
20.12.2006
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Subjects | |
Online Access | Get full text |
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Summary: | A motor having a reverse-rotation preventing unit, comprises: a casing; a stator fixedly-coupled to an inside of the casing; a primary rotor rotatably inserted into the stator; a motor shaft coupled to the primary rotor; a secondary rotor having a permanent magnet and rotatably inserted into an air gap between the stator and the primary rotor; a locking unit installed at an inner wall of the casing; a ratchet unit rotatably coupled to the secondary rotor, and locked or unlocked to/from the locking unit when the secondary rotor is forward-rotated or reverse-rotated, for rotating the secondary rotor in a forward direction; and a position setting unit for moving the ratchet unit to a locking position or a unlocking position by a difference between a centrifugal force generated when the secondary rotor is rotated and its restoration force. In the present invention, the motor is only forward-rotated without being reverse-rotated and thus a reliability thereof is enhanced. Furthermore, the number of the components is less and an entire structure is simplified. |
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Bibliography: | Application Number: CN200610092866 |