Patent ID: 6011388
Filing Date: 2000-01-04
Classification: F16C,G01P

Abstract:
A rolling bearing unit with rotating speed sensor comprising a stationary outer ring member having an inner peripheral face formed with an open end portion and an outer ring raceway, a rotatable inner ring member having an outer peripheral face formed with an open end portion and an inner ring raceway, a plurality of rolling elements provided so as to be freely rotatable between the outer ring raceway and the inner ring raceway, an annular tone wheel secured to the open end portion of the inner ring member and having a cylindrical peripheral portion with a magnetism property changing at a uniform pitch in a circumferential direction, a cover comprising a synthetic resin block and a metal portion and having a cylindrical engaging portion which is fixed to the open end portion of the outer ring member by engaging the cylindrical engaging portion with the inner peripheral face at the open end portion of the outer ring member, a sensor embedded in the synthetic resin block and having a peripheral face such that the peripheral face thereof opposes at least partly the cylindrical peripheral portion of the tone wheel, and a guide formed adjacent to at least one of the cylindrical peripheral portion of the tone wheel and the peripheral face of the sensor to make the tone wheel and sensor overlapped radially with each other.