Patent ID: 8316732
Filing Date: 2012-11-27
Classification: F16H,Y10T

Abstract:
1. A roller screw structure comprising a screw, a nut, a circulating assembly and a rolling assembly; wherein the screw and the nut include two correspondingly located spiral grooves, the circulating assembly is disposed on the nut and includes a return path that defines a closed circulating route by cooperating with the spiral groove of the nut, and the rolling assembly is movably disposed in the spiral grooves and the return path, the roller screw structure is characterized in that: the rolling assembly is a truncated cone, a slantwise rolling surface thereof contacts a surface of the spiral groove of the nut in a line-to-line manner, and an angle between a self-rotation axis and the rolling surface of the rolling assembly is from 0 degree to 6.3 degrees; a lead angle between the screw and the nut is β, a pitch circle diameter is dm, a center rotation radius of each rolling assembly is r