Moving body and actuating device having the same

摘要

The moving body of an actuating device is capable of automatically and rapidly eliminating clearances between nuts and a leadscrew. The moving body comprises: a first nut screwed with the leadscrew; a second nut screwed with the leadscrew and engaged with the first nut, the second nut being capable of relatively moving to and away from the first nut; a wedge member provided between the first nut and the second nut; and a biasing member biasing the wedge member so as to increase a distance between the first nut and the second nut. The first nut and the second nut are pressed onto the leadscrew by increasing the distance between the first nut and the second nut with the wedge member.