Field assembly for a motor and method of making same
US7038343B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2002 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | May 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cylindrical magnet ring assembly having a cylinder magnet flux ring (102) formed with a plurality of inwardly projecting anchors (108); a plurality of permanent magnets (104), wherein the magnet can be formed with step portions (112) in the inner radial surface; a molded plastic member (106) being molded around the magnets and anchors to secure the magnets to a surface of the cylinder flux ring. There are several variations of the embodiments of the invention. Few embodiments are the following: in one aspect of the invention, magnets are inserted into magnet molded around an assembly ring (806) and the molded plastic secures the assembly ring to the flux ring; in another aspect, there are two assembly rings, a first assembly ring (is inserted into the one side of the cylinder flux ring then the second assembly ring is inserted into the other side of the cylinder flux ring and mated to the first assembly ring, after that the molded plastic secures the two assembly rings. The foregoing cylindrical magnet ring assembly is used in a stator of a motor which is used in a power tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.