Abstract: A ball screw device includes a screw engaged into a nut member for forming two or more endless ball guiding passages and for receiving a number of ball bearing members, the nut member includes two or more conduits and recesses communicative with the helical grooves of the nut member, two deflecting devices are attached to end portions of the nut member and each include an inner member attached to the nut member and having two or more pathways aligned with the recesses of the nut member, and an outer member attached to the inner member and coupled to the inner member with one or more radially extended protrusions for suitably guiding ball bearing members.

Abstract: A ball screw device includes a screw engaged into a nut member for forming two or more endless ball guiding passages and for receiving a number of ball bearing members, the nut member includes two or more conduits and recesses communicative with the helical grooves of the nut member, two deflecting devices are attached to end portions of the nut member and each include an inner member attached to the nut member and having two or more pathways aligned with the recesses of the nut member, and an outer member attached to the inner member and coupled to the inner member with one or more radially extended protrusions for suitably guiding ball bearing members.

Abstract: A ball screw comprises a shaft, a nut, two return elements, plural rolling elements and a sleeve. When being rotated, the shaft will drive the nut to move and circulate the rolling elements within a circulation path defined by a loaded path and the return passages of the return elements. The nut is provided with a circular groove in an outer circumferential surface thereof, and the sleeve is disposed in the circular groove. The sleeve is provided with plural push grooves in an inner circumferential surface thereof, and there is an angular difference between a rolling passage in the nut and the respective push grooves, and the push grooves cooperate with the rolling elements which pass through the rolling passage. By such arrangements, the push grooves of the sleeve will be pushed by the rolling elements to convert the linear motion into rotary motion, thus making the sleeve rotate.

Abstract: A ball screw comprises a shaft, a nut, two return elements, plural rolling elements and a sleeve. When being rotated, the shaft will drive the nut to move and circulate the rolling elements within a circulation path defined by a loaded path and the return passages of the return elements. The nut is provided with a circular groove in an outer circumferential surface thereof, and the sleeve is disposed in the circular groove. The sleeve is provided with plural push grooves in an inner circumferential surface thereof, and there is an angular difference between a rolling passage in the nut and the respective push grooves, and the push grooves cooperate with the rolling elements which pass through the rolling passage. By such arrangements, the push grooves of the sleeve will be pushed by the rolling elements to convert the linear motion into rotary motion, thus making the sleeve rotate.