ROLLING BEARING UNIT WITH ENCODER

摘要

PROBLEM TO BE SOLVED: To sufficiently suppress flowing out of grease from a rolling element installing space 18 to an end space 20 without providing any contact-type seal ring between the rolling element installing space 18 and the end space 20.

SOLUTION: A hub side confronting surface 21 provided to the outer peripheral surface of the axial inner end part of an inner ring 13a and a cover side confronting surface 25 provided to the inner peripheral surface of an inclined cylindrical part 23 constituting a cover 6a are made to approach and face each other. The hub side confronting surface 21 and the cover side confronting surface 25 are formed to be partially conical projected curved surfaces coming into contact with partial spherical surfaces with an inclination center O when each hub 2a is inclined with respect to an outer ring 1 as a center. In a neutral state, a facing interval T between the hub side confronting surface 21 and the cover side confronting surface 25 is set smaller than a facing interval S between the detection surface of an encoder 4 and the inner surface of a ring part 13a constituting the cover 6a (TCOPYRIGHT: (C)2013,JPO&INPIT