DEVICE IN A FORCE ACTUATOR

摘要

An oscillating axial movement of a drive member (18) in a force actuator is generated by a prestressed rod (17) of Terfenol material being exposed to a pulsating magnetic field. This oscillating movement is transformed to an axial movement in an application direction of a push rod (21) coaxial therewith. The drive member and the push rod are connected by a connection member (22), which is in self-locking thread engagement with the drive member and the push rod and is subjected to a torque from a spiral spring (23) for its rotation during the idle stroke of the oscillation movement in the direction for advancing the push rod in the application direction.