Miniature motor with a worm reduction gear
US4987791A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1990 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | Feb 20, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19828
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A miniature motor with a worm reduction gear comprising a miniature motor having a motor shaft, which is of a relatively small diameter and which is extended to a predetermined length, at least three bearings supporting the motor shaft, and a worm having a shaft hole into which the motor shaft is inserted. Since the miniature motor and the worm reduction gear are manufactured separately, and subsequently assembled together by press-fitting the motor shaft in to the shaft hole of the worm the assembly of the miniature motor with a worm reduction gear is facilitated. The use of a motor shaft having a diameter smaller than the diameter of the worm helps reduce the size and weight of the miniature motor with a worm reduction gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.