FIELD: machine building.
SUBSTANCE: proposed device comprises screw and translating structure. Said structure consists of housing with first and second covers accommodating threaded rollers running therein to engage with screw thread. Threaded rollers are provided with spherical undercuts. Similar undercuts are made on first cover and in cylindrical parts arranged in second cover. Besides, balls are arranged in said undercuts. Radius of said undercuts is 2-3% larger than that of balls. Second cover accommodates assemblies for individual adjustment of threaded roller axial play. Every said assembly consists of cylindrical part, wedge part and adjustment screw with locking elements. Wedge part has inclined face on one end and thrust surface on opposite face, side guide surfaces and threaded hole.
EFFECT: higher load-bearing capacity, axial stiffness, accuracy and longer life.
3 dwg
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