| 摘要 |
<p>There is provided, according to the present invention, a wheel bearing apparatus incorporated with a wheel speed detecting apparatus which can prevent ingress of foreign matter into the wheel speed detecting portion of the wheel bearing apparatus. The wheel bearing apparatus of the present invention comprises an encoder (19) mounted on the outer circumferential surface of the inner ring (6); and a sensor holder (15) arranged on the end of the outer member (4) oppositely to the encoder (19) and including an annular fitting member (16) and a holding portion (17) formed by synthetic resin molded integrally with the annular fitting member (16) and embedded therein a wheel speed detecting sensor (20) oppositely to the encoder (19) via a predetermined gap and is characterized in that a seal (11) is arranged at the inboard side of the encoder (19), the seal (11) including a first sealing plate (21) and a second sealing plate (22) fit respectively on the sensor holder (15) and the inner ring (6), and that the tip end (26) of the annular fitting member (16) is enveloped by plastic resin forming the holding portion (17).</p> |
