Linear motor having coils surrounding an axially moving magnetic rod
US8143750B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2006 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Jul 23, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compact linear motor is provided which is able to limit a rod, which linearly moves relatively to coils, from revolving.The linear motor comprises a rod (11) equipped with magnets (13), coils (4) surrounding the rod (11), and a housing (5) covering the coils (4), and the rod (11) is made to linearly move relatively to the coils (4) by magnetic fields from the magnets (13) and current made to flow through the coils (4). And the rod (11) comprises an outer circumferential surface on which spline grooves (10a) are formed so as to run along an axial direction of the rod (11). The housing (5) comprises a spline nut (8) that fits the spline grooves (10a) and limits the rod (11) from revolving around an axis line thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.