Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – Including actuator interconnecting plural pulleys on spaced...
Patent
1984-03-01
1985-05-07
Leppink, James A.
Endless belt power transmission systems or components
Pulley with belt-receiving groove formed by drive faces on...
Including actuator interconnecting plural pulleys on spaced...
474 37, 474149, F16H 918
Patent
active
045155763
ABSTRACT:
A variable speed transmission (20) includes a sprocket (46) mounted on a first shaft (22) for rotation therewith. A variable effective diameter pulley (30) is mounted for rotation on a driven shaft (32). The pulley includes a pair of pulley halves (80, 82) having opposed inclined belt engaging surfaces (84, 86) and splines (90, 94) extending from the pulley halves. The splines are intermeshed so that the pulley halves may be drawn together or separated while rotating as a unit. A split shaft (130), including two half shafts (132, 134), extend within the pulley halves. Each half shaft engages one of the pulley halves such that as the half shafts are moved relative to one another, the pulley halves are moved one relative to the other. A pulley control mechanism (66) is provided for moving the halves of the split shaft simultaneously such that the center line of the pulley remains fixed as the pulley halves move together or apart. An endless chain assembly (60) is mounted around the gear and variable effective diameter pulley arrangement to transmit rotation therebetween. The belt includes edge portions (234) for engaging the pulley and an intermediate portion (230) for engaging the sprocket (46). An idler pulley (50) is controlled by an idler tensioner actuation mechanism (52) to maintain tension on the belt as the effective diameter of the pulley is varied.
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Leppink James A.
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