Apparatus and methods for low cost linear actuator

摘要

An actuator apparatus includes a magnet housing defining an interior volume between a first opening at a first end and a second opening at a second end. Multiple magnets are included within the magnet housing. A piston assembly includes a piston housing, a coil and a shaft. A magnetic pole is configured to be received through the second opening of the magnet housing and within the interior volume. The magnetic pole defines an interior lumen and an opening in communication with the interior lumen. At least a portion of the piston assembly is configured to be movably received through the first opening of the magnet housing and within the interior volume such that the magnetic pole is received within the interior region of the piston housing and at least a portion of the shaft is received within the interior lumen of the magnetic pole.