Compact wheel speed detector capable of saving space and improving workability

Abstract

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 a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip.

1 . A wheel speed detector comprising:
 an outer ring as a stationary ring;   an inner ring as a rotatable ring; and   an annular seal device disposed in an annular space between the outer ring and the inner ring;   wherein the annular seal device comprises:
 an annular core bar fixed on an inner peripheral surface of the outer ring, 
 a magnetic sensor fixed on an axial inner surface of the annular core bar, 
 a seal lip fixed on an axial outer surface of the annular core bar, 
 a magnetic ring fixed on an outer peripheral surface of the inner ring so as to be opposed axially to the magnetic sensor, and 
 a slinger fixed on the outer peripheral surface of the inner ring and coming in contact with the seal lip. 
   
     
     
         2 . A wheel speed detector comprising:
 an outer ring as a stationary ring;   an inner ring as a rotatable ring; and   an annular seal device disposed in an annular space between the outer ring and the inner ring;   wherein the annular seal device comprises:
 a core bar and an L-shaped metal fitting fixed on an inner peripheral surface of the outer ring, respectively, 
 a magnetic sensor fixed on an axial inner surface of the L-shaped metal fitting, 
 a slinger fixed on the outer peripheral surface of the inner ring, 
 a magnetic ring fixed to the slinger so as to be opposed axially to the magnetic sensor, and 
 a seal lip fixed to the core bar and coming in contact with the slinger.