Vehicular-type alternator with speed-responsive fan coupling

Details Vehicular-type alternator with speed-responsive fan coupling Vehicular-type alternator with speed-responsive fan coupling

1983-12-23

1985-05-14

Wong, Peter S.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 60R, 310 68D, 384506, 464 36, F16C 1912, H02K 708

Patent

active

045174822

ABSTRACT:
To limit the maximum speed of the fan blade of an automotive-type alternator, the fan blade (21) is secured to the outer race (23) of a ball bearing (22) having a two-part inner race (24, 25), one of the parts being an axially slidable sleeve (25) which is spring-pressed by a cup spring (26) in engagement with a drive pulley (18) against the first race (24). Until a certain limiting reactive pneumatic force or frictional force is reached, the cup spring (26) will clamp the balls (22) between the inner and outer races, so that the fan blade (21) will rotate with the pulley; when the reactive force and speed are exceeded, however, the fan blade can rotate about the balls (22), and hence slip with respect to the rotation of the pulley (18).

REFERENCES:
patent: 1446633 (1923-02-01), Baker
patent: 3555317 (1971-01-01), Allen
patent: 3940192 (1976-02-01), Hagele
patent: 4059317 (1977-11-01), McCloskey
patent: 4329000 (1982-05-01), Keske
patent: 4397380 (1983-08-01), Yew
patent: 4437846 (1984-03-01), Ragaly
patent: 4463275 (1984-07-01), Ragaly

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