Patent ID: 6323640
Filing Date: 2001-11-27
Classification: F16C,G01P

Abstract:
A rolling bearing unit for a hub of a vehicle wheel, the bearing comprising:a radially outer rotating race;a radially inner stationary race;a sealing device positioned between said races; anda measuring device for measuring the rotating speed of the outer race, said measuring device comprising an encoder wheel comprising a radially oriented annular disc of magnetized plastic or rubber material;the bearing further comprising a metallic annular insert adapted for fixing the encoder wheel to the bearing outer race, said insert comprising:an outer cylindrical portion that attaches via a force fit to an outer surface of the outer race;a radial wall portion that forms an annular seat for accommodating the encoder wheel, said wall portion extending radially inwardly so as to co-operate with said sealing device to close the gap between said races; anda portion joining said outer cylindrical portion and said radial wall portion, said joining portion being a surface on which an axial thrust is applied for performing said force fitting;wherein the surface on which said axial thrust is applied has an elbow portion joining said outer cylindrical portion to said radial wall portion.