High accuracy, zero backlash rotary-to-linear electromechanical actuator
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United States of America Patent
Stats
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Apr 3, 2012
Grant Date -
Feb 10, 2011
app pub date -
Aug 4, 2009
filing date -
Aug 4, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electromechanical actuator is provided for converting rotary action into linear action, and includes an electric motor, a cable yoke, an output shaft, and a pair of cables. The electric motor is adapted to be selectively energized and is configured, upon being energized to generate a drive torque. The cable yoke is coupled to receive the drive torque and is configured, upon receipt thereof, to rotate about a rotational axis. The output shaft is coupled to receive a drive force and is configured, upon receipt thereof, to translate along a linear axis that is disposed at least substantially perpendicular to the rotational axis. Each cable is wound, in pretension, on a portion of the cable yoke and around a portion of the output shaft. The pair of cables is configured, upon rotation of the cable yoke, to supply the drive force to the output shaft.
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