Forced air-cooled vehicular-type alternator

Details Forced air-cooled vehicular-type alternator Forced air-cooled vehicular-type alternator

1984-11-28

1986-05-20

Levy, Stuart S.

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Overload release coupling

Torque transmitted via a ball

310 78, F16D 702, H02K 718

Patent

active

045898553

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.

REFERENCES:
patent: 2974504 (1961-03-01), Johnson
patent: 4463275 (1984-07-01), Ragaly

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