BEARING UNIT FOR A VEHICLE WHEEL

摘要

A bearing unit for a vehicle wheel is provided having an axis of rotation and a radially outer stationary ring including a tubular axial lug delimited by an outer cylindrical surface, and with a flange transverse to the axis of rotation and axially delimited. A radially inner rotatable ring defines, with the ring, a space. An encoder is fixed to the inner ring and extends outside of the space and in front of the axial lug. A protective cover mounted on the axial lug to protect the encoder and close off the space. The stationary ring includes a shaped annular channel formed across the axial surface and delimited axially by a bottom surface and the side wall with a bent edge arranged axially in abutment against the bottom surface of the annular channel. Sealing means are arranged between the bent edge and the bottom surface to seal the annular channel.

主权项

1. A bearing unit (1) for a vehicle wheel, the bearing unit (1) having an axis of rotation (A) and comprising:
a radially outer stationary ring (10) provided with a tubular axial lug (14′) delimited by an outer cylindrical surface (12), and with a flange (14) transverse to the axis of rotation (A) and axially delimited, on the side where the axial lug (14′) is located, by an axial front surface (15); a radially inner rotatable ring (20) defining, together with the stationary ring (10), a space (3); an encoder (30) fixed onto the inner ring (20) and extending outside of the space (3) and in front of the axial lug (14′); and a protective cover (40) mounted on the axial lug (14′) to protect the encoder (30) and close off the space (3) and having a side wall (42) mounted on the outer cylindrical surface (12); wherein the stationary ring (10) includes an annular channel (16) formed across the axial surface (15) and delimited axially by a bottom surface (17); wherein the side wall (42) of the cover (40) is provided with a bent edge (43) arranged axially in abutment against the bottom surface (17) of the annular channel (16); and wherein sealing means (50) are arranged between the bent edge (43) and the bottom surface (17) to seal in a leak tight manner the annular channel (16), preventing the infiltration of impurities between the cover (40) and the axial lug (14′).