Centrifugally controlled expansible pulley with manually engaged

Details Centrifugally controlled expansible pulley with manually engaged Centrifugally controlled expansible pulley with manually engaged

1975-01-14

1976-07-13

Scott, Samuel

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

7423017M, F16H 5552

Patent

active

039687023

ABSTRACT:
A variable diameter pulley including a pair of pulley flanges axially displaceable one relative to the other along a shaft, centrifugally responsive weights acting on one flange to cause axial displacement thereof, a pusher ring interposed between the actuating weights and the axially displaceable flange, a centrifugal weight carrier transmitting the rotation of the shaft to the axially displaceable pulley flange. This variable diameter pulley is characterized by driving the displaceable flange through follower blocks and guideways at the periphery of the displaceable flange and the centrifugal weight carrier rather than spline connection to the shaft for reduced angular vibration, noise and wear. There are two sets of guideways and the blocks can engage one or the other of these two sets but not both simultaneously. The guideways of one set are parallel to the shaft axis so that movement of the displaceable flange is effected only by the centrifugal weights whereby the pulley is purely centrifugally responsive. The guideways of the other set are oblique to the shaft axis in a direction to move the displaceable flange away from the fixed flange so as to obtain a negative torque reaction which opposes and retards the centrifugally responsive action on the displaceable flange resulting in a pulley that is negatively responsive to torque and positively responsive to centrifugal action.

REFERENCES:
patent: 3597987 (1971-08-01), Kiekhaefer
patent: 3812731 (1974-05-01), Sugimoto et al.

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