Patent ID: 7870803

Claim:
Ball screw, comprising: a threaded nut with thread channels for rolling bodies; a threaded spindle with thread channels for rolling bodies; an intermediate bush, which is arranged between the threaded nut and the threaded spindle; the intermediate bush is rotatable relative to the threaded nut and is displaceable in a translatory manner relative to the threaded nut; wherein the intermediate bush has thread channels, which face the threaded nut and are adapted to the thread channels of the threaded nut, and rolling bodies are guided in these thread channels; and wherein the intermediate bush has thread channels, which face the threaded spindle and are adapted to the thread channels of the threaded spindle, and rolling bodies are guided in these thread channels; a first threaded arrangement, which is formed by means of the thread channels of the threaded nut and the intermediate bush facing one another; a second threaded arrangement, which is formed by means of the thread channels of the intermediate bush and the threaded spindle facing one another; wherein the first threaded arrangement and the second threaded arrangement operate in opposite directions; and a magnet device which is relatively non-rotatably connected to the intermediate bush; wherein the magnet device displaces in a translational manner in a linear axial direction relative to a stator device by means of the translational displaceability of the intermediate bush in that direction and wherein the intermediate bush is a part of a rotor of a motor.