Guided electromechanical motor

Electromechanical actuator arrangement, comprising an electromechanical motor;

• a rail arrangement;
• said rail arrangement having a rail relative which said electromechanical motor drives in a main displacement direction;
• said electromechanical motor having electromechanically active actuators attached to a motor block and arranged to provide an actuating action against a drive surface, parallel to said displacement direction, of said rail by means of an interaction portion;
• said electromechanically active actuators exhibit shape changes upon excitation, by which shape changes said actuating action is caused;
• said rail arrangement further having at least one guide member provided parallel to said main displacement direction;
• said at least one guide member has a guiding surface facing said motor block;
• said motor block having a guidance surface facing said guiding surface of said at least one guide member;
• one of said guiding surface and said guidance surface having at least a tangent line in a first plane parallel to said main displacement direction and transverse to said drive surface;
• and
• the other one of said guiding surface and said guidance surface having a tangent surface in a second plane parallel to said first plane.