Patent ID: 6042272
Filing Date: 2000-03-28
Classification: F16C

Abstract:
A rolling bearing with a sealing device for a wheel, comprising:an inner race member;an outer race member being able to rotate relatively to said inner race member;a plurality of rolling elements which are disposed between said inner race member and said outer race member; anda seal unit for sealing an end of said rolling bearing, said seal unit comprising:an outside seal ring member including a fixed portion of an elastic member fixed to an engaging groove provided in said inner race member, said engaging groove being formed at an edge portion of an outer circumferential surface of said inner race member, an inner side face located at an inner side of said engaging groove in an axial direction of said inner race member serving as a positioning flat surface, a lip portion of an elastic member slidingly contacting with said outer race member, and a core plate having (i) a plate-like extended portion extended from a bent portion bent in an inside direction of the rolling bearing in a diameter direction of said inner and outer race members, said plate-like extended portion defining a flat portion on a surface thereof, and said flat portion being opposite to said inner side face of said engaging groove of said inner race member through said elastic member of said fixed portion, thereby preventing muddy water from entering an interior of said rolling bearing and (ii) a lip supporting portion for supporting said lip portion, said lip supporting portion being formed by bending an outer end of said core plate in the inside direction of the rolling bearing;an inside seal ring member including a fixed portion of an elastic member fixed to an engaging groove provided in said outer race member, said engaging grove being formed at an edge portion of an inner circumferential surface of said outer race member, an inner side face located at an inner side of said engaging groove in an axial direction of said outer race member serving as a positioning flat surface, a lip portion of an elastic member slidingly contacting with said inner race member, and a core plate having a plate-like extended portion extended from a bent portion bent in the inside direction of the rolling bearing in said diameter direction, said plate-like extended portion defining a flat portion on a surface thereof, and said flat portion being opposite to said inner side face of said engaging groove of said outer race member through said elastic member of said fixed portion of said inside seal ring member; anda mutual seal lip member extending from one of said outside and inside seal ring members to slidingly contact with the other of said outside and inside seal ring members,wherein said core plate of each of said inside and outside seal ring members is provided with an interposing rubber for positioning and a seal rubber for sealing said engaging groove, and said flat portion of said core plate of each of said inside and outside seal ring members is positioned in the axial direction with respect to the inner side face of said engaging groove while interposing said interposing rubber.