Patent ID: 6196727
Filing Date: 2001-03-06
Classification: B60B,F16C

Abstract:
A rolling bearing unit comprising:a first inner ring member having an inner axial end, a radial flange disposed on a first outer peripheral surface portion of the inner axial end, a peripheral shoulder formed in a root portion of the radial flange, a track surface formed in a second outer peripheral surface portion of the inner axial end and having a bottom diameter smaller than the smallest diameter of the peripheral shoulder, and a shaft portion having a diameter smaller than the bottom diameter of the track surface;a second inner ring member disposed on an end of the shaft portion of the first inner ring member and having a track surface formed in an outer peripheral surface thereof;a connecting member for connecting the second inner ring member to the shaft portion of the first inner ring member;an outer ring member having a radial flange disposed on an outer peripheral surface portion thereof, and track surfaces respectively formed in the inner peripheral surface thereof and opposite to the track surfaces of the first and second inner ring members;a first rolling member disposed between the track surface of the first inner ring member and the track surface of the outer ring member opposite to the track surface of the first inner ring member;a second rolling member disposed between the track surface of the second inner ring member and the track surface of the outer ring member opposite to the track surface of the second inner ring member;a plurality of retainers each for respectively retaining the first and second rolling members; anda seal connected to the inner axial end of the outer ring member and having a lip for sliding contact with the peripheral shoulder of the first inner ring member;wherein the second outer peripheral surface portion includes a convex portion located adjacent to the axial outer end of the track surface of the first inner ring member for receiving thereupon the first rolling member during assembly of the rolling bearing unit, the convex portion having a diameter greater than the bottom diameter of the track surface of the first inner ring member.