Rotor for small motors and manufacturing method therefor
First Claim
1. A rotor for small motors provided on its shaft with a plurality of rotor magnetic poles of a salient-pole configuration and a commutator unit, each of the rotor magnetic poles being composed of a winding around a laminated core and each of both ends of each wound wire being connected to a commutator leg part coupled with a tip of a corresponding commutator segment of the commutator unit, wherein:
- a connective portion between the both ends of each of said wound wires and the corresponding commutator leg part is formed by winding a wire stripped of its insulating coat and welding the wound portion.
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Accused Products
Abstract
The leading end of a wire to be wound fed from a coil winder is wound around one of commutator leg parts a prescribed number of turns and then wound around a corresponding salient pole. After that, it is similarly wound successively around other commutator leg parts and around other salient poles and, after it is wound around the same commutator leg part as the one around which the leading end of the wire was first wound, the wound wire is cut. Only the portions that will be wound around the commutator leg parts in synchronization with the feed of the wire to be wound from the coil winder are stripped of their insulating coat prior to being wound, and the wound portions of the commutator leg parts are welded.
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Citations
10 Claims
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1. A rotor for small motors provided on its shaft with a plurality of rotor magnetic poles of a salient-pole configuration and a commutator unit, each of the rotor magnetic poles being composed of a winding around a laminated core and each of both ends of each wound wire being connected to a commutator leg part coupled with a tip of a corresponding commutator segment of the commutator unit, wherein:
a connective portion between the both ends of each of said wound wires and the corresponding commutator leg part is formed by winding a wire stripped of its insulating coat and welding the wound portion. - View Dependent Claims (2, 3, 4, 5)
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6. A manufacturing method for a rotor for small motors provided on its shaft with a plurality of rotor magnetic poles of a salient-pole configuration and a commutator unit, each of the rotor magnetic poles being composed of a winding around a laminated core and each of both ends of each wound wire being connected to a commutator leg part coupled with a tip of a corresponding commutator segment of the commutator unit, said method comprising steps of:
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winding a leading end of a wire to be wound fed from a coil winder around one of commutator leg parts a first prescribed number of turns, then winding the wire around a corresponding salient pole a second prescribed number of turns, thereafter similarly winding the wire successively around other commutator leg parts and other salient poles, and winding the wire around the same commutator leg part around which the leading end of the wire to be wound was first wound, and then cutting the wire;
stripping the insulating coat from only the portions to be wound around the commutator leg parts prior to being wound in synchronization with feed of the wire to be wound from the coil winder; and
welding the wound portions of said commutator leg parts. - View Dependent Claims (7, 8, 9, 10)
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Specification