Patent ID: 6076970
Filing Date: 2000-06-20
Classification: F16C,G11B

Abstract:
A fluid bearing apparatus comprising:a sleeve for having a bushing portion formed therein;a shaft for having first dynamic pressure generating grooves formed at a lower portion thereof which faces said bushing;a thrust bearing having second dynamic pressure generating grooves formed on an upper surface thereof, said second dynamic pressure generating grooves having fluid inlets formed as enlarged portions thereof, said second dynamic pressure generating grooves generating a predetermined fluid pressure when a fluid is introduced into said second dynamic pressure generating grooves through said fluid inlets, said fluid inlets of said second dynamic pressure generating grooves being enlarged for receiving an increased amount of said fluid to be introduced into said second dynamic pressure generating grooves; anda bearing bracket to which said sleeve and said thrust bearing are disposed and fixed,wherein said fluid inlets are provided along an inner and an outer side of each of said second dynamic pressure generating grooves, respectively, said inner side facing the axial center of said thrust bearing and said outer side facing an outer edge of said thrust bearing,wherein said second dynamic pressure generating grooves include first and second side walls of which edges are curved in a predetermined curvature, andwherein said first and second side walls have bending portions, respectively, wherein said fluid is collected at said bending portion of said first side wall which forces a pressure to said first side wall when fluid is introduced through said fluid inlets.