Vehicular alternating current dynamo
US5345132A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 23, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Jun 23, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/141
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An object of the invention is to, in a vehicular alternating current (AC) dynamo, reduce an influence of vibration on a brush during operation, thereby preventing the brush from wobbling, cracking or causing other damages, also to make the brush sufficiently exposed to cooling air during operation, thereby preventing the brush temperature from rising excessively. In the vehicular AC dynamo, by virtue of a pressing force produced upon a tubular cover integral with a fan guide being fixed to a rear bracket through a seal member, an abutting end surface of a projection of the tubular cover is axially abutted with an inner abutting surface of a recess of the brush holder for pressing and fixing said brush holder against and to the rear bracket. In addition, the side of the fan guide and the side of the brush holder are arranged to be flush with each other, and a labyrinth seal structure is constituted by a circumferential groove of an end flange and a cylindrical projection which is formed by both the tubular cover and the brush holder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.