Patent ID: 8734020

Claim:
A bearing assembly with a sensor, comprising: a rolling bearing having an outer race to be mounted on a stationary member; a sensor holder that is made of a synthetic resin and carries the sensor, the sensor holder including a positioning portion fitted onto a radially inner surface of the outer race from a first axial side thereof, the positioning portion including a rib fitted in a circumferential groove formed in the radially inner surface of the outer race, and the sensor holder being an annular member having opposite ends and being supported on the outer race by fitting of the positioning portion onto the radially inner surface of the outer race; and a spring member configured so that, with the sensor holder supported on the outer race, the spring member can be mounted to the sensor holder in a compressed state so that the sensor holder is fixed in position on the outer race by an elastic recovery force of the spring member; wherein the spring member is an annular member having ends and fitted in an annular groove formed in the sensor holder to extend between the opposite ends of the sensor holder; wherein the spring member includes a main portion fitted in the annular groove of the sensor holder, and opposite end portions circumferentially protruding from the annular groove, the opposite end portions of the spring, member having mutually-facing, circumferentially-facing surfaces abutting each other with the main portion fitted in the annular groove so as to cause the opposite end portions of the spring member to be deflected outwardly to increase spring forces by which the sensor holder is fixed in position on the radially inner surface of the outer race by elastic recovery of the opposite end portions.