Hub-bearing assembly for vehicles

A hub-bearing assembly for rotatably mounting a wheel of a motor vehicle on a suspension strut of the same vehicle, the hub bearing assembly comprising:

• a wheel hub to support the wheel of the vehicle and provided with an axial shoulder;
• a bearing unit having a radially stationary outer ring configured to be constrained to the strut;
• a first radially inner rotating ring mounted on the wheel hub, separately from the wheel hub, and just before the axial shoulder to be locked, axially on the opposite side of the axial shoulder, by means of a rolled edge is provided directly behind the first radially inner rotating ring by cold deformation;
• and a second radially inner rotating ring defined by the wheel hub;
• two rows of rolling bodies radially interposed between the stationary outer ring and the two rotating radially inner rings inside a first rolling raceway and a second rolling raceway formed, respectively, in the first and in the second radially inner rotating ring, and
• the first radially inner rotating ring comprises a supporting Hertzian portion formed by a second raceway and an accumulation portion extending axially from the second raceway, and
• an annular groove being formed in a mounting surface in a passage between an assembly seat, a shoulder, and a fillet, such that radial depth of the annular groove corresponding to radius of curvature of the fillet,
• wherein,
• the accumulation portion includes a reduced thickness and dimensions smaller than dimensions of the Hertzian portion,
• the Hertzian portion being substantially non-deformable and the accumulation portion being deformable elastically due to the reduced thickness such that the accumulation portion being able to accumulate elastic energy during the cold deformation for obtaining the rolled edge.