| 摘要 |
A rolling contact bearing is fitted at one end thereof with a sealing device and a device for measuring the relative revolving speed between the bearing races. The sealing device comprises a metal insert (10) of annular shape fast for rotation with the rotating bearing race (11). The speed measuring device comprises a multipolar ring (18) mounted to the metal insert (10) and provided with magnetized segments of alternate polarity in the circumferential direction. The multipolar ring (18) is a ring of plastoferrite co-molded to the metal insert (10). Formed on the insert (10) is formed a plurality of radial recesses (21) adapted to yield, in the co-molding operation, a corresponding plurality of radial protrusions (22) in the multipolar ring (18). The radial recesses and protrusions (21, 22) are mutually engaged so as to prevent relative rotation between the multipolar ring (18) and the metal insert (10), but allow relative radial displacement owing to thermal variations.
|
