Device for detecting the speed of rotation of automobile wheel

摘要

A revolving speed detecting device for use on a bearing for a vehicle wheel. The bearing has a rotatable ring and a fixed ring. The device has a pulser ring mounted on one of the two rings at one end thereof and a press-fit ring mounted on the other of the two rings at the one end thereof. The pulser ring is located inside the press-fit ring. The press-fit ring is integrally provided with a sensor housing unit filled with a resin. A rotation sensor has a sensing unit embedded in the resin in the sensor housing unit. The sensing unit has a sensor element received in a hole formed in the press-fit ring so as to be located opposite to the pulser ring through a gap. A seal member is provided between the press-fit ring and the rotatable ring to seal the space therebetween.