Bearing assembly method and pressurization jig

Abstract

According to one embodiment, a bearing assembly method for providing a bearing between a shaft and a rotator, comprises: embedding the bearing between the shaft and the rotator, and supplying a first adhesive between an inner ring of the bearing and the shaft and a second adhesive between an outer ring of the bearing and the rotator; partially pressing a plurality of points on an end surface of the inner ring before the first adhesive and the second adhesive are cured; and finishing pressing when the first adhesive and the second adhesive are cured.

1 . A bearing assembly method for providing a bearing between a shaft and a rotator, the bearing assembly method comprising:
 embedding the bearing between the shaft and the rotator, and supplying a first adhesive between an inner ring of the bearing and the shaft and a second adhesive between an outer ring of the bearing and the rotator;   partially pressing a plurality of points on an end surface of the inner ring before the first adhesive and the second adhesive are cured; and   finishing pressing when the first adhesive and the second adhesive are cured.   
     
     
         2 . The bearing assembly method of  claim 1 , wherein the partially pressing comprises pressing the inner ring with a pressurization jig comprising bearing pressing surfaces arranged at regular intervals along the end surface of the inner ring. 
     
     
         3 . The bearing assembly method of  claim 2 , wherein a pressing force is applied to the pressurization jig at a portion in a middle of each bearing pressing surface. 
     
     
         4 . The bearing assembly method of  claim 2 , wherein
 the bearing pressing surfaces are three bearing pressing surfaces arranged at regular intervals along the end surface of the inner ring, and   a length of each bearing pressing surface along the end surface of the inner ring is equal to or less than a diameter of a ball of the bearing.   
     
     
         5 . The bearing assembly method of  claim 1 , wherein
 the rotator is a rotary actuator block of a magnetic disk device,   the shaft is assembled to extend through the rotary actuator block, and   the bearing is attached on an end of the shaft with the first adhesive and the second adhesive.   
     
     
         6 . A pressurization jig configured to apply a pressing force to a bearing upon assembly of the bearing, the pressurization jig comprising:
 bearing pressing surfaces configured to press an end surface of the bearing at a plurality of points.   
     
     
         7 . The pressurization jig of  claim 6 , wherein the bearing pressing surfaces are arranged at regular intervals in a circumferential direction. 
     
     
         8 . The pressurization jig of  claim 7 , further comprising a pressed surface to which the pressing force is applied from the outside in a middle of an adjacent pair of the bearing pressing surfaces. 
     
     
         9 . The pressurization jig of  claim 6 , wherein
 the bearing pressing surfaces are provided on three points at regular intervals along an end surface of an inner ring of the bearing, and   a length of each bearing pressing surface along the end surface of the inner ring is equal to or less than a diameter of a ball of the bearing.