| 摘要 |
A speed responsive clutch is provided with shifting means including orbitally rotatable centrifugal flyweights and a lost motion connector. At a predetermined drive speed, the radius of rotation of the flyweights changes by means of the lost motion connector providing a change in energy level without corresponding change in drive speed. Rotation of an input member at a predetermined threshold speed of rotation results in outward movement of the flyweights without further increase in drive speed thereby increasing the energy level to provide a clutch release force. Rotation of the input member at another preselected reengagement speed of rotation results in inward movement of the flyweights without further reduction in drive speed thereby reducing the energy level to permit reengagement of the clutch. A substantial difference between the threshold and reengagement speeds can be provided for avoiding cyclic shifting of the clutch when operating near either speed.
|
