Overload clutch

Details Overload clutch Overload clutch

1981-06-22

1984-05-22

Levy, Stuart S.

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

Overload release coupling

Torque transmitted via a ball

464 38, F16D 706

Patent

active

044499540

ABSTRACT:
An overload clutch having a sleeve and a hub with a cage connected to the hub having apertures in which balls are received for effecting torque transmission in the clutch. A pressure ring spring-biased to engge the balls with cam elements on the sleeve operates to urge the balls towards the sleeve. The balls engage within recesses in a control ring within the sleeve and the cam elements of the sleeve extend through windows in the control ring which are circumferentially larger than the cam elements so that the control ring and the sleeve may move to a limited extent circumferentially relative to each other. The shape of the pressure ring and of the cam elements is such that as the balls go out of engagement with the recesses in the control ring, for example when overload occurs, the force exerted on the balls is decreased so that wear is reduced under overload conditions. The ability of the control ring to move circumferentially relative to the sleeve provides a virtually free-wheeling condition if the clutch overruns.

REFERENCES:
patent: 2238583 (1941-04-01), Dodge
patent: 3727432 (1973-04-01), Eaves et al.

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