Dichtungsanordnung für zwei miteinander verbundene, relativ drehende Teile, insbesondere die zwei Ringe eines Rollenlagers

摘要

The sealing assembly (1) for the two rings (2, 3) of a rolling bearing (4) includes a substantially rigid shield (6) integral with the rotary ring (3) of the bearing (4); a sealing element (10) cooperating in sliding manner with the fixed ring (2); and a magnetic ring (45) cooperating with an outer detecting device (47) to determine the relative rotation speed of the two rings (2, 3). The sealing element (10) extends to form a cover layer (32) on a radially outer lateral surface (40) of a sleeve-shaped portion (11) of the shield (6), and on the face (38) of a radially outer flange (12) of the shield (6) facing the sleeve-shaped portion (11), so as to define an annular seat (46) for the magnetic ring (45). The magnetic ring (45) has beveled, knurled sides (48, 49) to assist insertion and prevent rotation of the magnetic ring inside the seat; and, on the opposite side to the flange (12), the magnetic ring (45) is retained axially by a deformable circumferential projection (53) projecting radially from one end of a cylindrical portion (41) of the cover layer (32) covering the sleeve-shaped portion (11) of the shield (6). The profile of the projection (53) and the dimensions of the annular seat (46) are such as to ensure a predetermined interference between the magnetic ring (45) and the seat (46).