Compact variable speed pulley assembly

Details Compact variable speed pulley assembly Compact variable speed pulley assembly

1985-08-19

1986-08-12

Leppink, James A.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

474 17, F16H 5556

Patent

active

046053867

ABSTRACT:
A compact, variable speed pulley assembly is disclosed in which pulley faces are mounted to a pulley shaft for rotation with respect thereto and for relative axial displacement along the shaft. A torsion spring is connected to transmit a torque force from the shaft to at least one of the pulley faces. The pulley assembly further includes a motion damping brake which applies a sliding friction force resisting relative angular displacement between the pulley faces and the pulley shaft. This friction force damps out over-correction by the torsion spring for speed variations induced by changes in the V-belt width, machine dynamic imbalance and workpiece characteristics. Fatigue of the torsion spring is eliminated without increasing the pulley assembly bulk by providing a second compression spring or providing a conical torsion spring.

REFERENCES:
patent: 2283392 (1942-05-01), Shadrick
patent: 2607235 (1952-08-01), Ruegenberg
patent: 2699071 (1955-01-01), Miner
patent: 2891410 (1959-06-01), Papageorges
patent: 2900834 (1959-08-01), Bessette
patent: 2994228 (1961-08-01), Osborne
patent: 3393572 (1968-07-01), Larson
patent: 3616706 (1971-11-01), Shimamoto

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