192 clutches and power-stop control – Clutches – Operators
Patent
1981-09-08
1983-08-09
Miller, J. D.
192 clutches and power-stop control
Clutches
Operators
192 89B, 192 90, 192107C, 310 78, 310 92, F16D 702
Patent
active
043973809
ABSTRACT:
Fail safe electromagnetic clutch (10) includes a driving member (12) and a driven member (16). Engagement structure (30) cushions engagement between the driving member (12) and driven member (16) when the clutch is engaged. The engagement structure (30) includes a pair of elements (36, 34) and a resilient wave washer (42) located therebetween. The waver washer (42) biases the element (36) into driving engagement with the driving member (12) and biases the element (34) into driving engagement with the driven member (16). When the clutch is disengaged, a magnetic coil (22) forces the element (34) away from the driven member (16), thereby collapsing the wave washer (42). When the clutch is to be re-engaged, the coil (22) is de-energized, thereby permitting the wave washer (42) to drive the element (34) back into driving engagement with the driven member (16). Accordingly, there is a conical clutching surface between the engagement structure (30) and the driven member (16) and a disc engagement surface between the engagement structure (30) and the driving member (12). Therefore, upon engagement of the clutch, the conical engagement surface (50, 52) slips briefly, and the disc engagement surfaces (37, 39) slip until the clutch is fully engaged, thereby cushioning engagement of the clutch to minimize the inertial shock that would otherwise occur when the clutch (10) is engaged.
REFERENCES:
patent: 2888119 (1959-05-01), Vissing
patent: 3313385 (1967-04-01), Forster
patent: 3732447 (1973-05-01), Perhats
patent: 4030583 (1977-06-01), Miller
patent: 4258836 (1981-03-01), Miller
patent: 4285420 (1981-08-01), Sekella
Canadian Fram Limited
Miller J. D.
Rebsch D. L.
Seitzman Markell
Wells Russell C.
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