Wheel bearing assembly

A wheel bearing assembly for rotatably mounting and supporting a wheel to a vehicle body, comprising:

• a wheel hub having a wheel mounting flange;
• at least one inner ring mounted on the wheel hub;
• an outer ring having a vehicle-body-side mounting flange;
• and
• one or more rolling elements configured to rotatably support the wheel hub and the inner ring with respect to the outer ring,
• wherein an accommodation space in which a constant velocity joint is accommodated is formed in a vehicle-body-side end portion of the wheel hub,
• one or more recesses for accommodating rolling members of the constant velocity joint are provided in an inner peripheral surface of the accommodation space along a circumferential direction,
• the inner ring comprises an extended portion formed to protrude more toward the vehicle body than a vehicle-body-side end portion of the outer ring, and a rubber boot configured to prevent foreign matters from flowing into the accommodation space is mounted on the extended portion,
• the inner ring comprises a cylindrical press-fitting portion formed on a wheel-side inner peripheral surface thereof, and the cylindrical press-fitting portion is mounted on a press-fitting portion formed on the wheel hub in a press-fitting manner;
• and
• the inner ring comprises a spline portion formed to extent in an axial direction on a vehicle-body-side inner peripheral surface thereof, and the spline portion is coupled and mounted to a corresponding spline portion of a spline mounting portion formed on an outer peripheral surface of the wheel hub.