FIELD: machine building.
SUBSTANCE: invention refers to facilities for conversion rotary motions into progressive. The facility consists of a screw, and of case composed of two case components connected by means of screws and pins, and a nut secured in the case. Threaded rollers interacting with the screw and nut are installed in the case; the threaded rollers perform planetary motions. Gear rings engaging internal gear rings of bushings are arranged on the ends of rollers. Additionally the facility is equipped with two split collets with their internal surfaces resting on cylinder surface of the nut, while with their external surfaces the collets interact with surfaces of the case components. Also slots are cut in each collet at equal angles.
EFFECT: facilitating increased load capacity and rigidity of facility; also eliminating gaps in facility.
6 dwg
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