Motor with speed reduction mechanism capable of absorbing axial deviation between armature shaft and worm shaft
US8193668B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2009 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Jul 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/143
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Detecting a rotation state of a worm wheel side with good accuracy while allowing play between an armature-shaft-side coupling member and a worm-shaft-side coupling member. The armature-shaft-side coupling member is provided together rotatably to the other end of an armature shaft; the worm-shaft-side coupling member is provided together rotatably to one end of a worm shaft; the armature-shaft-side coupling member and the worm-shaft-side coupling member are coupled together rotatably; and a sensor magnet is provided together rotatably to the worm-shaft-side coupling member. Therefore, the rotation state of the worm shaft can be detected with good accuracy. Even if the play is provided between the armature-shaft-side coupling member and the worm-shaft-side coupling member, this play does not affect the accuracy of detection of the rotation state of the worm shaft, thereby bringing no problem regarding accuracy of detection of a rotation state of a worm wheel side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.