Encoder element for a rolling-contact bearing equipped with an information sensor assembly and rolling-contact bearing including such an encoding element

摘要

The encoder element (8) for a rolling-contact bearing equipped with an information sensor assembly is rendered integral with a rotating race of the bearing and interacts with a sensor of the said information sensor assembly in order to detect the speed of rotation of the bearing. It comprises an annular target (13) made of ferromagnetic material provided with a cylindrical bearing surface (13a) for mounting on the rotating race of the bearing and with a flat disc-shaped radial part (13b) with windows (13c) or slots of identical size and uniformly distributed along the circular path, and an axially magnetized bipolar ring (14) provided with axial crenellations (14b) which are uniformly and circumferentially distributed and which penetrate axially into the said windows or slots in the target.