Motor
US9847692B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2012 |
| Grant date | Dec 19, 2017 |
| Priority date | — |
| Expiry date | Nov 19, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/118
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coupling portion is provided on either a rotary shaft or a worm shaft in an integrally rotational manner, said coupling portion for connecting the rotary shaft to the worm shaft and having a coupling hole therein. The coupling projection provided on the other of the rotary shaft and the worm shaft is inserted in the coupling hole. A circumferential clearance and a radial clearance are formed between the inner surface of the coupling hole and the coupling projection. Circumferential buffer portions are interposed in the circumferential clearance, and radial buffer portions are interposed in the radial clearance. The inner surface of the coupling hole and the coupling projection are arranged such that the circumferential buffer portions are compressed to deform in the circumferential direction whereby to allow the buffer portions to be brought into contact with each other when the rotary shaft is rotating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.