Patent ID: 7520193

Claim:
A ball screw assembly comprising: a screw shaft, a nut, a plurality of balls, at least one circulate component and at least one fixing member, a helical groove formed in an outer surface of the screw shaft for engaging with the nut, the nut is hollow, and in its inner surface is formed a helical groove located opposite the helical groove of the screw shaft, thus forming a circulating path for the balls, the circulate component is disposed in the nut for enabling the balls to circulate in the circulating path, the ball screw assembly is characterized in that: the nut is defined with a plurality of circular holes for installation of the circulate component, and the circular holes are formed in an outer surface of the nut for insertion of the circulate components, at least one axial locking hole is formed in the nut, an axial hole and a radial hole are connected to each other and are formed in the circulate component, the axial hole of the circulate component is aligned to the axial locking hole of the nut, the circulate component is fixed in the nut by at least one locking member that is formed by injecting liquid resin into the radial hole of the circulate component, so that the liquid flows to the axial hole of the circulate component and the axial locking hole of the nut, and forms the locking members after curing.