Ball screw assembly

Abstract

A ball screw assembly includes: a screw shaft with an outer peripheral track surface formed on its outer peripheral surface; a nut with an inner peripheral track surface formed on its inner peripheral surface and penetrated by the screw shaft; a plurality of balls disposed between the outer peripheral track surface and the inner peripheral track surface; and a cylindrical circulation part with a return path formed inside. The nut has two through holes penetrating the outer peripheral surface and the inner peripheral surface. The circulation part has: two legs inserted into the through holes; and a main body disposed on the outer peripheral side of the nut and connecting the two legs to each other. At the front end of the legs, an inlet and outlet of the return path opening toward the inner peripheral side of the nut is formed. At least one washer is disposed between the outer peripheral surface of the nut and the main body.

Images