IMPROVED LINEAR-ROTARY SERVO ACTUATOR

摘要

An in-line hollow shaft direct drive independently driven linear-rotary servo actuator, having a linear voice coil and a rotary slot-less motor sharing a common hollow shaft. Both the linear voice coil and slot-less rotary motor are independently energized to linearly move and rotate the shaft. The longitudinal axis of the voice coil motor is in-line and co-axial with the longitudinal axis of the rotary slot-less motor. There are no stacking of the linear voice coil motor portion onto the rotary slot-less motor portion, or vice verse. The common shaft is supported on one end by a bottom bearing allows for linear and rotary motion, and the other by the top bearing assembly built into the coil of the voice coil motor. The two axes are coupled together by the common shaft but the two motions (linear and rotary) are independent.