LONG-LIFE SLIDING SCREW MECHANISM AND ELECTRIC ROTATION/ LINEAR MOTION CONVERSION MECHANISM

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a sliding screw mechanism having life performance not inferior to that of a ball screw and an electric rotation/linear motion conversion mechanism using the sliding screw mechanism. SOLUTION: A screw and a nut after polished are combined and rubbed with each other under the conditions of loading and speed of a sliding surface corresponding to such a numerical value that the product of loading and speed is maximized on the screw sliding surface under actual usage conditions for establishing sliding conditions more suitable for a surface roughness to provide substantially zero sliding wear for the rotation/linear motion conversion mechanism. They are also combined with a motor having such output property in a whole surface area that the product of the loading and speed on the sliding surface is smaller than the product of the loading and speed on the sliding surface during rubbing with each other.