192 clutches and power-stop control – Clutches – Torque responsive
Patent
1983-12-14
1985-10-08
Yuen, Henry C.
192 clutches and power-stop control
Clutches
Torque responsive
192 8R, 188134, F16D 4320
Patent
active
045454701
ABSTRACT:
A narrow tolerance range slip clutch has a friction clutch and a ball ramp mechanism, with one or more springs associated with the friction clutch and ball ramp mechanism to exert a clamp load on the friction clutch and to establish a trip torque setting on the ball ramp mechanism. With a driving torque below a trip torque setting, there is a normal drive through the slip clutch. When the driving torque exceeds the trip torque setting, the clamp load on the friction clutch is reduced by means of a force balance between a ball ramp axial force and a clutch reaction force also proportional to input torque which are functions of the input torque and spring forces acting on the ball ramp mechanism and the friction clutch. With this force balance, the clamp load on the friction clutch is relieved sufficiently to avoid transmission of torque above the trip torque setting, with the result that there is continuous power flow through the slip clutch and after relief of the overloading, the slip clutch automatically resets itself to a full clamp load in transmitting normal torque levels.
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Sundstrand Corporation
Yuen Henry C.
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