Patent ID: 6217220
Filing Date: 2001-04-17
Classification: B60B,F16C

Abstract:
A rolling bearing unit for a road wheel comprising;a stationary outer ring with first and second ends having an outer peripheral surface formed with a first installation flange and an inner peripheral surface formed with an outer ring raceway,a rotatable hub with first and second ends having an outer peripheral surface formed with a second installation flange at the second end thereof for supporting the road wheel and an inner ring raceway at an axial middle portion thereof,a plurality of rolling members rotatably provided between the outer ring raceway and the inner ring raceway,a first seal member for providing a shield for the opening at the first end of the outer ring, anda second seal member in a ring shape for providing a shield between the opening portion at the second end of the outer ring and the outer peripheral surface of the axial middle portion of the hub,the hub having a hole section formed to have an opening in the central portion at either end of the hub, thereofa third seal member provided within a space isolated by the first seal member from outside to provide a shield between the opening of the hole section at the first end of the hub and the portion where the rolling members are located between the outer peripheral surface of the hub and the inner peripheral surface of the outer ring, anda fourth seal member for covering the opening of the hole section at the second end of the hub.