Patent ID: 6943542
Filing Date: 2005-09-13
Classification: F16C,F16J,G01P

Abstract:
1. A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with an opposite magnetic ring, wherein one of the outer ring and the inner ring is rotatable while the other is stationary, the magnetic ring is fixed to the rotatable ring and the magnetic sensor is fixed to the stationary ring, the magnetic ring and the magnetic sensor being situated within a gap between the inner ring and the outer ring and sealed within the gap with a seal device, wherein the magnetic ring is magnetized so that a north pole and a south pole are alternately arranged in a circumferential direction, the seal device is constructed of a rotatable seal member and a stationary seal member, the magnetic sensor is fixed to the stationary seal member, the magnetic ring is fixed to the rotatable seal member, and the magnetic ring is covered with a nonmagnetic elastic member.