Protective cover and bearing device including protective cover

Abstract

The present invention is intended to provide a protective cover, comprising an inner ring 12 with an inner ring track surface 12 A on an outer peripheral surface; an outer ring 13 with an outer ring track surface 13 A on an inner peripheral surface; a bearing with rolling elements 14 between the inner ring track surface 12 A and the outer ring track surface 13 A; a magnetic encoder 8 that is positioned at one axial end portion of the bearing and fixed to the inner ring 12 ; and a magnetic sensor that is fixed to the outer ring 13 , a cup-shaped protective cover 1 press-fitted into the outer ring 13 to cover the magnetic encoder 8 and intervene between the magnetic encoder 8 and the magnetic sensor is formed by performing cold press molding of an austenitic stainless steel plate material with a nickel content of 8.5 to 13 weight %.

1 . A cup-shaped protective cover for a bearing device including: an inner ring with an inner ring track surface on an outer peripheral surface; an outer ring with an outer ring track surface on an inner peripheral surface; a bearing with a rolling element between the inner ring track surface and the outer ring track surface; a magnetic encoder that is positioned at one axial end portion of the bearing, fixed to the inner ring, and has N and S poles alternately arranged at regular intervals in the circumferential direction; and a magnetic sensor that is fixed to the outer ring so as to be opposed to the magnetic poles of the magnetic encoder to detect the rotation of the magnetic encoder,
 the protective cover being press-fitted into the outer ring to cover the magnetic encoder and intervene between the magnetic encoder and the magnetic sensor, wherein
 the protective cover is formed by performing cold press molding of an austenitic stainless steel plate material with a nickel content of 8.5 to 13 weight %. 
   
     
     
         2 . A bearing device comprising the protective cover according to  claim 1 .