Wheel hub rolling bearing assembly for a motor vehicle with a sealing device

The invention relates to a rolling bearing comprising a fixed member (1), a rotating member (3) and rolling bodies (7) arranged in a rolling space (6) at least one side of which presents an annular opening (9) formed between two edges (11, 12) each surrounded by an axially extending outer wall (13, 14), said opening being equipped with a sealing device comprising two rigid frames (15, 16) each having an axial outer bearing surface (15a, 16a) which is associated with an outer wall (13, 14) and an axial inner bearing surface (15b, 16b) arranged in the opening (9), said axial inner bearing surfaces being arranged in radial alignment to form a sealing chamber (17) between an upstream ring (19) and a downstream ring (20) respectively comprising one of said axial inner bearing surfaces, at least one of said axial inner bearing surfaces being equipped with a dynamic sealing element (18) which has at least one lip (21) arranged in said sealing chamber while being in sliding contact with the other axial inner bearing surface (16b, 15b).