Method of making rotor of brushless motor
First Claim
1. A method of making a rotor, the method comprising:
- providing an elongated shaft;
providing a non-elastic member around at least a portion of the elongated shaft, wherein the non-elastic member comprises a plurality of through-holes through its body;
providing one or more ring magnets over the non-elastic member;
arranging the non-elastic member relative to the elongated shaft such that the non-elastic member and the shaft define a space therebetween; and
injecting a precursor of an elastic material into the space, which forms the elastic material to fill the space, thereby providing a vibration absorption member between the non-elastic member and the shaft, wherein the elastic material penetrates the through-holes of the non-elastic member and further extends outwardly to form a plurality of protrusions contacting the one or more ring magnets.
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Accused Products
Abstract
Some embodiments of the present disclosure provide a method of making a rotor of an electric brushless motor configured to be light weight and prevent vibrations generated during an operation of the motor to be transferred to the shaft of the rotor. The method includes providing a shaft elongated in a rotational axis, providing a single body magnet comprising alternately magnetized portions, and providing a vibration absorption portion interposed between the shaft and single body magnet. The vibration absorption portion absorbs vibrations generated during the operation of the motor and may include an elastic or a non-elastic material. The method further includes providing a non-elastic portion configured to inhibit the expansion of the vibration absorption portion when the vibration portion is elastic.
116 Citations
16 Claims
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1. A method of making a rotor, the method comprising:
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providing an elongated shaft; providing a non-elastic member around at least a portion of the elongated shaft, wherein the non-elastic member comprises a plurality of through-holes through its body; providing one or more ring magnets over the non-elastic member; arranging the non-elastic member relative to the elongated shaft such that the non-elastic member and the shaft define a space therebetween; and injecting a precursor of an elastic material into the space, which forms the elastic material to fill the space, thereby providing a vibration absorption member between the non-elastic member and the shaft, wherein the elastic material penetrates the through-holes of the non-elastic member and further extends outwardly to form a plurality of protrusions contacting the one or more ring magnets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification