Radial internal clearance adjustment feature of cylindrical roller bearing

摘要

(57) Abstract Objective At time of principal axis turning at full speed seizure accident of cylindrical roller bearingWith, because preventing the cutting degradation at the time of principal axis low rpmIt makes the radial internal clearance automatic adjustment feature attaching which finishes. Constitution Rim of outer ring 6 of cylindrical roller bearing 3 taper 6aIt forms, it possesses the tapered bore 7a who is fit to taper 6aAdjustment ring 7, in bearing housing 2 axial directional movement possiblyThe piezoelectric actuator 8 which is provided on both sides of the providing and adjust ringA, the voltage which is impressed in 8B corresponding to the rpm of principal axis 5, increaseThe decrease point, the piezoelectric actuator the equal amount in expanding and contractingThe axial directional movement to do the ri adjustment ring, changing the diameter of the outer ring, rajiYou adjust the Al opening.