Patent ID: 6926445

Claim:
A rolling bearing unit with a sensor, comprising: an outer ring and an inner ring, one of the outer and inner rings being a rotary ring and the other being a fixed ring, and the outer and inner rings being rotatable with respect to each other; a plurality of rolling elements rollably interposed between an outer raceway formed in an inner peripheral surface of the outer ring and an inner raceway formed in an outer peripheral surface of the inner ring; and a sensor unit for detecting at least one of temperature and vibration of a rolling bearing including the rolling elements, wherein: the sensor unit is disposed on an axial-direction end portion of the fixed ring the sensor unit includes a detect part, a control part, a transmitter device and a power supply for operating the detect part, the control part and the transmitter device; at least a part of a receiver apparatus for receiving a radio signal transmitted from the transmitter device is provided in a member that is separated from a member supporting the sensor; and the part of the receiver apparatus is disposed at a position substantially opposing the sensor unit.