Transmission for converting rotary motion into linear motion

Details Transmission for converting rotary motion into linear motion Transmission for converting rotary motion into linear motion

1995-11-03

1998-11-03

Graysay, Tamara L.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including separate belt on each of coaxial pulleys...

474 74, 474 84, 474 88, 474 89, 74 8921, 74 8922, F16H 700, F16H 702, F16H 900, F16H 6306

Patent

active

058300945

ABSTRACT:
A transmission for reducing the pulley ratio between a drive shaft and a transmission shaft. The transmission is adapted to convert a higher speed rotary motion to a lower speed linear motion. The transmission has two pulleys rigidly mounted together on a shaft and the pulleys have a different number of teeth. A pair of belts are mounted on the drive shaft and a follower shaft, each one of the belts engages one of the transmission pulleys. One belt on the transmission shaft engages a pulley on the top of a first transmission pulley and another on the bottom of a second transmission pulley. When the drive shaft imparts motion to the belts, the belts move the transmission between the drive shaft and the follower shaft. By arresting the movement of one of the belts by a clutch/brake, the transmission can be converted into a two speed transmission. If the belts are independently driven, one each by two motors, the transmission becomes operable in an infinite number of pulley ratios. One particular application for this pulley transmission is in a carriage drive system for a Coordinate Measuring Machine.

REFERENCES:
patent: 5343999 (1994-09-01), Yoshida et al.
patent: 5564309 (1996-10-01), Nakamura et al.

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