Patent ID: 10099509

Abstract:
A wheel bearing apparatus, incorporating a wheel speed detecting apparatus, has a mounting portion (17) on a cover body (15). It includes an insertion portion (17a) formed with a bottom insertion bore (22), and a cylindrical securing portion (17b). A wheel speed sensor unit (18) is secured in the insertion portion (17a) by a securing bolt (21), via a mounting member (20). The insertion portion (17a) of the mounting portion (17) is arranged at a horizontal position through the center of a bottom 15c of the cover body (15). The securing portion (17b) is arranged at a position vertically below the insertion portion (17a). The wheel speed sensor (18) and a pulser ring (14) oppose each other, via a bottom (22a) of the insertion bore (22). A discharging portion, with an axially extending slit (24) or discharging groove (26), is formed at a road surface-side of the insertion bore (22) to communicate the insertion bore (22) with the outside.