OUTER RING PRESSURE RING OF ROLLING BEARING AND MAIN SPINDLE DEVICE AND PRE-LOAD CONTROL METHOD FOR ROLLER BEARING

摘要

PROBLEM TO BE SOLVED: To high-precisely control the pre-load of the rolling bearing of a main shaft device through a device of simple structure. ;SOLUTION: An outer ring pressure ring 1 is formed such that flanges 1c are interconnected on both side parts of a thick pressure drum 1a through a thin flexible part 1b and a pressure receiving surface 1d is formed at the side on the outer peripheral side of the flange 1c. The outer ring pressure ring 1 is fitted between an outer cylinder 12 and the outer ring 6 of a roller bearing 5. When, by feeding fluid to a pressure chamber R, the pressure receiving surface 1d of the flange 1c is pressed by a press ring 23, the inside diameter of the pressure drum 1a is contacted and the pre-load of the roller bearing 5 is increased.;COPYRIGHT: (C)1998,JPO