| 摘要 |
A combined sensor and bearing assembly ( 1 ) is of a type having a capability of detecting a point of origin and includes a rolling bearing unit ( 6 ) and a rotation sensor unit ( 31 ). The rolling bearing unit ( 6 ) is made up of a rotatable raceway member ( 4 ), a stationary raceway member ( 5 ) and at least one row of rolling elements ( 3 ). The rotation sensor unit ( 31 ) includes a to-be-detected member ( 8 ) having a magnet and fitted to one of the raceway members ( 4, 5 ), and a magnetic detecting member ( 9 ) fitted to the other raceway member ( 4, 5 ) at a location confronting the to-be-detected member ( 8 ). This combined sensor and bearing assembly ( 1 ) is used at a location close to an electromagnetic coil ( 17 ) emanating a leakage magnetic field, in a condition in which a direction of flow of an electric current through the electromagnetic coil ( 17 ) is fixed in one direction so that a direction of a magnetic flux, with which the magnetic detecting member ( 9 ) is switched off, may coincide with a direction of the leakage magnetic flux.
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