Rotor for miniature motors
US5113105A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1990 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Oct 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K13/006
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor for miniature motors having a shaft serving as a rotating shaft, a commutator having commutator segments mounted on a commutator proper fixedly fitted to the shaft, a rotor core fixedly fitted to the shaft and having rotor windings wound thereon, a plurality of positioning bosses formed in such a manner as to protrude toward the side of the rotor core on the commutator proper, and a positioning groove, formed on the side surface of the rotor core, into which the positioning bosses are inserted; the commutator being fixedly fitted by press-fitting the positioning bosses into the positioning groove, characterized in that PA0 positioning grooves which are formed on the side surface of the rotor core, and smaller in number than the number of the positioning bosses, PA0 a long positioning boss, among a plurality of the positioning bosses, having a sufficient length to be press-fitted into the positioning grooves, PA0 other short positioning bosses having a length at least equal to the thickness of an insulating core fitted to the side surface of the rotor core are provided; PA0 the long positioning boss being press-fitted into the positioning groove, and said commutator is fixed…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.