ELECTROMECHANICAL ACTUATOR

摘要

An electromechanical actuator device (10) comprises a drive actuator (20), a holding actuator (30), an object (50) to be moved, a support piece (40) and biasing means (60). The object (50) to be moved has an interaction surface (52) parallel to a main motion direction (2). The support piece (40) is mechanically attached the drive actuator (20) and the holding actuator (30). The biasing means (60) is arranged for providing a normal force (68). Both actuators (20, 30) have respective volumes of electromechanically active material (24, 34) and respective electrode arrangements (26, 36) configured for enabling activation. The drive actuator (20) is excitable to move a driving interaction portion (25) in two-dimensional paths parallel to the main motion direction (2) and transverse (4) to the interaction surface (52). The holding actuator (30) is excitable to move a holding interaction portion (35) in a direction perpendicular to the main motion direction (2) and transverse (4) to the interaction surface (52). The holding actuator (30) is wider than the drive actuator (20) in the main motion direction (2).