Patent ID: 8022596

Claim:
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; the other one of said guiding surface and said guidance surface having a tangent surface in a second plane parallel to said first plane; said rail arrangement has two guide members provided parallel to said main displacement direction on opposite sides relative said motor block; said two guide members have a respective guiding surface facing said motor block; and said motor block having two outer guidance surfaces facing a respective one of said guiding surfaces of said two guide members.