Variable speed pulley assembly

Details Variable speed pulley assembly Variable speed pulley assembly

1997-10-15

1999-04-27

Jeffery, John A.

Endless belt power transmission systems or components

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

Plural members forming plural belt-receiving grooves on...

474 33, F16H 916, F16H 5556

Patent

active

058974504

ABSTRACT:
A variable speed pulley assembly for use with V-shaped drive and driven belts include a center pulley supported for rotation and movable axially in opposite directions between an outer drive pulley half and an outer driven pulley half. The center pulley comprises an inner drive pulley half and an inner driven pulley half fixed for rotation with each other. The inner drive pulley half has a first surface presented at an angle to an inner surface of the outer drive pulley half to define between them a drive pulley groove. The drive belt is received in the drive pulley groove and is movable radially in the drive pulley groove between a radially innermost position and a radially outermost position. The inner driven pulley half has a second surface presented at an angle to an inner surface of the outer driven pulley half to define between them a driven pulley groove. The driven belt is received in the driven pulley groove and is movable radially in the driven pulley groove between a radially innermost position and a radially outermost position. At least one of the drive pulley groove and the driven pulley groove has an included angle between the facing surfaces which define the at least one groove which included angle varies between the radially innermost position of the belt in the at least one groove and the radially outermost position of the belt in the at least one groove. The radially inner portions of the outer pulley halves are configured to enable the belts to drop down lower in the pulley grooves without getting stuck.

REFERENCES:
patent: 4738651 (1988-04-01), Favache et al.
patent: 4857033 (1989-08-01), Czarka
patent: 4941863 (1990-07-01), Sampei et al.

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