Forced air-cooled vehicular-type alternator
US4589855A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1984 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Nov 28, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/09
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To facilitate manufacture and increase the lifetime of a speed-dependent coupling between the ventilation or fan wheel (23) and drive shaft (18, 21) of the alternator, an inner race (25) is secured to the drive shaft, formed with two parallel running grooves (26, 27) in which two rows of balls (28, 29) are rolling. A pair of outer races is formed as ring-shaped elements (30, 31), of part-circular cross section, surrounding opposite, at least approximately quarter-circular zones of the balls, the outer races being axially biased towards each other by a pair of disk-shaped membranes (34, 35) to which the ventilation fan wheel (23) is attached, the membranes being biased towards each other by a biasing force (F), for example exerted by axial screws, securing the disk-shaped membranes together for resiliently biasing the ring-shaped elements towards each other and exerting axial pressure on the balls (28, 29) running in the grooves of the inner race and beneath the outer races. Sealing strips (50, 51, 52) can be placed between the membranes to prevent escape of lubricant of the coupling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.