Rotation detecting apparatus

摘要

A rotation detecting apparatus includes core member having a receiving hole, an inner member that is rotatably supported by the core member, and an outer member that constitutes a wheel bearing device. The rotation detecting apparatus also includes a rotation detecting sensor, an external lead cable that is drawn out from an inner space through the receiving hole in the core member and a sealing member that is secured to an outer peripheral surface of the external lead cable.

主权项

1. A rotation detecting apparatus comprising:
a core member having a receiving hole; an inner member that: i) is rotatably supported by the core member, ii) is configured to be attached to a wheel, and iii) includes a magnetic rotor; an outer member that constitutes a wheel bearing device, the outer member having the inner member fixed thereupon; a rotation detecting sensor that: i) is attached to the core member, ii) is contained in an inner space covered by the core member, iii) is supported by the core member, and iv) has a detecting section,
the detecting section: i) being opposed to the magnetic rotor, ii) detecting a variation of a magnetic field caused by a rotation of the magnetic rotor, and iii) having a lead wire extending therefrom; an external lead cable that is drawn out from the inner space through the receiving hole in the core member,
the external lead cable being electrically connected to the lead wire; and a sealing member that is secured to an outer peripheral surface of the external lead cable, the sealing member being fitted in the receiving hole of the core member.