Dynamic Characteristics of Non-Uniform Motion Mechanisms with Ball Bushings : 2nd Report, On the Circulation of Balls and the Dynamic Characteristics of Mechanisms

Abstract

The influences of the bearing clearance and the eccentricity of loads upon the frictional characteristics of the ball bushing and upon the dynamic characteristics of non-uniform motion mechanisms have been analysed.It has been clarified that the friction decreases when the bearing clearance is taken zero or negative, and that the amplitude and critical velocity for occurrence of stick-slip vibration may be reduced by making the clearance and the eccentricity of loads small. As well as the translational vibration, the angular vibration of the bushing and the bending vibration of the shaft have been analysed in relation to the circulation of the balls.