| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a wheel speed detecting device having a countermeasure against the intrusion of muddy water. <P>SOLUTION: An annular recess groove 22 is provided on an outer circumference 21 of an end portion of a hub 12 on a sensor side. A cup-shaped flange portion 23, which covers the annular recess groove 22 while keeping a predetermined gap T1 with the outer circumference 21 of the end portion of the hub 12, extends from a sensor supporting member 18. Muddy water heads toward a multi-pole magnet ring 15 through the gap T1 formed between the flange portion and the outer circumference of the hub. However, the intrusion of the muddy water can be effectively prevented by reducing the gap T1. Muddy water still invading is trapped in the annular recess groove 22. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
