Abstract: A dog clutch actuator includes: a pull sleeve mounted on a shaft and movable in an axial direction to push or pull a dog clutch moving portion movably connected to the shaft in the axial direction; a base plate movably mounted to the pull sleeve; wedge blocks mounted on and radially movable relative to the base plate; a shape memory alloy wire connecting the base plate and the wedge blocks and configured to contract and expand depending on whether electric power is supplied to move the wedge blocks; a slider that is movably mounted to the pull sleeve and having cam contact with the wedge blocks so as to push the dog clutch moving portion and that is disposed between the wedge blocks and the dog clutch moving portion; and at least one actuator spring that elastically connects the base plate and the slider.

Abstract: A dog clutch actuator includes: an actuator housing; a manipulator movably mounted in a length direction of the actuator housing and including a fork configured to be slidably coupled to a shoulder portion of a dog clutch moving part to selectively move the dog clutch moving part of a dog clutch; an engagement wire of a shape-memory alloy that connects the actuator housing and the manipulator and that is configured to contract based on the supply of electric power to move the manipulator in one direction; and a release wire of a shape-memory alloy that connects the actuator housing and the manipulator and that is configured to contract based on the supply of power to move the manipulator in a different direction.