BALL BEARING EQUIPPED WITH ENCODER FOR DETECTING ROTATIONAL SPEED OF WHEEL OF TWO-WHEELED MOTOR VEHICLE, AND DEVICE FOR DETECTING ROTATIONAL SPEED OF WHEEL OF TWO-WHEELED MOTOR VEHICLE, THE DEVICE USING THE BALL BEARING

摘要

Construction of a ball bearing with encoder is achieved that supports a wheel of a motorcycle such that the wheel can rotate freely, makes it possible to detect the rotational speed of the wheel, and sufficiently prevents foreign matter from getting inside the internal space of the bearing. The opening on the end section of the internal space 19 of the bearing is covered by a combined seal ring 20 that comprises a slinger 21 and a seal ring 22 A ring-shaped encoder 9a is mounted on and fastened to the outside surface of an outside ring section 24 of the slinger 21. The detecting section of a sensor 30 is faced toward the outside surface of the encoder 9a and can detect the rotational speed of a wheel that rotates together with the outer ring 11a.