| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a structure which can be constructed with a small size at low cost, with freedom in design and is excellent in sealability preventing intrusion of foreign matters to a part disposed with an encoder 14 and a rotation detecting sensor 13 for detecting rotational speed. <P>SOLUTION: A second seal lip 23 is disposed all over the circumference between an axial end face 22 of an outer ring 9 of a rotation-side raceway ring and an outer circumferential edge part of a holder member 15a supporting the rotation detecting sensor 13. Then, foreign matters such as things having magnetism are prevented from being attached to the encoder 14 and the rotation detecting sensor 13. The rotation detecting sensor 13 is supported against a supporting shaft 3 which does not rotate, other than a ball bearing 8 equipped with the encoder; thereby the size of the ball bearing 8 equipped with the encoder can be made small and freedom in design can be ensured. <P>COPYRIGHT: (C)2013,JPO&INPIT |
