Patent ID: 6190051
Filing Date: 2001-02-20
Classification: F16C,G01P

Abstract:
A roller contact bearing unit, for the hub of a vehicle wheel, comprising a radially outer rotating race (10), a radially inner stationary race (11), a sealing device (16) between said races (10, 11) and a device for measuring the rotation speed of the outer race (10), in which the measuring device includes an encoder wheel (13) in the form of a radially oriented annular disc made of plastic or rubber material, characterised by the fact that it includes an annular insert of non-magnetic metal (14) which is suitably shaped to form:a constraining means (14a) for fixing the insert (14) to the outer race of the bearing unit;an axial abutting means (14b) suitable for abutting against a lateral surface (10b) of said outer race (10);an annular seat (14c) for housing and externally enclosing the encoder wheel (13);a support means (14d) for a rubber element (15) which forms a sealing covering (15b) suitable for sliding against a surface (16) which forms part of a stationary element (11) of the bearing unit wherein said rubber element (15) also forms a radially outer portion (15b) of a substantially cylindrical shape (15b) which extends to the interior of said seat (14c) to block the rotation of the encoder wheel (13) in relation to the insert (14).