Patent ID: 8596146

Claim:
A sensor equipped wheel support bearing assembly for rotatably supporting a vehicle wheel relative to a vehicle body structure comprising: an outer member having an inner periphery formed with double row rolling surfaces; an inner member having an outer periphery formed with rolling surfaces held in face-to-face relation with the rolling surfaces in the outer member, one of the outer member and the inner member being a stationary member of the wheel support bearing assembly; double row rolling elements interposed between the respective rolling surfaces in the outer and inner members; and a sensor assembly fitted to the peripheral surface of the stationary member in a fashion coaxial with the stationary member; wherein the sensor assembly includes electronic components comprising; a plurality of sensor units, each having a strain generating member fixed to a peripheral surface of the stationary member, in contact therewith and a sensor fitted to the strain generating member for detecting a strain induced in the strain generating member, a signal processing IC for processing an output signal from the sensor, and a signal cable for transmitting the output signal so processed to the outside of the bearing assembly, wherein the electric components are disposed inwardly of an annular protective covering to provide an annular sensor assembly, and wherein each of the strain generating members comprises a thin plate of a strip shaped configuration, when viewed from top, having a cutout formed at a lateral portion thereof, the cutout extending inwardly in a width direction of the strain generating member.