192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1980-01-28
1982-03-30
Krizmanich, George H.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 30W, 192 358, 192 56R, 474 19, 474 70, 56 103, F16D 702, F16D 4320, B60K 4100
Patent
active
043219918
ABSTRACT:
In the variable speed V-belt drive of a combine harvester threshing cylinder, the driven sheave is torque-responsive, responding automatically to adjust drive belt tension according to the torque being transmitted. A linear hydraulic actuator, integral with the drive sheave, is used to adjust an axially movable sheave half with respect to a fixed sheave half so as to vary sheave effective diameter and hence driven speed. At any given speed setting, oil is trapped in the hydraulic actuator and oil pressure varies according to separating force between the halves of the drive sheave which in turn depends upon belt tension. A pressure switch, connected so as to sense the oil pressure, has a set point such that at a predetermined maximum (overload) belt tension, the switch is actuated so as to declutch or disconnect the drive sheave from its power source, thus protecting the threshing cylinder and drive components from damage. The signal from the pressure switch may be used also, or alternatively to actuate an operator warning signal.
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Teijido Joseph A.
Vogelaar Bernard F.
Deere & Company
Krizmanich George H.
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