초록 ▼

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 surfa

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.

대표청구항 ▼

A variable speed transmission for transmitting rotational forces between a first shaft and a second shaft comprising: chain-belt engagement means communicating with the first shaft; a variable effective diameter pulley communicating with the second shaft, said pulley comprising a pair of pulley halv

A variable speed transmission for transmitting rotational forces between a first shaft and a second shaft comprising: chain-belt engagement means communicating with the first shaft; a variable effective diameter pulley communicating with the second shaft, said pulley comprising a pair of pulley halves having opposed inclined belt engaging faces and a centerline defined by a plane between the pulley halves and equally spaced therefrom, said pulley halves further having a continuous belt engaging surface; means for varying the effective diameter of said pulley comprising a split shaft having two half shafts extending within said pulley, each half shaft engaging one of said pulley halves such that as said half shafts of said split shaft are moved relative to one another, said pulley halves are moved one relative to the other, and controls for engaging the exterior of each shaft half for moving said half shafts of the split shaft simultaneously such that the center line of said pulley remains fixed as said pulley halves move together or apart; and an endless chain-belt assembly encompassing said chain-belt engagement means and the variable effective diameter pulley to transmit rotation between the first and second shafts.