| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device capable of enhancing positioning accuracy by suppressing resonance. SOLUTION: The pivot shaft (bearing device) 10 includes: a shaft 40 formed to have a columnar shape around an axial line L1; a cylindrical sleeve 60 coaxially arranged in the radial direction of the shaft 40 leaving a predetermined interval and having an inner side filled with lubrication fluid J; and a bearing body 70 formed to have a cylindrical shape, arranged between the shaft 40 and the sleeve 60 and having an outer peripheral face 71 fixed to the sleeve 60 and an inner peripheral face 72 serving as an opposing face 73 opposing to the outer peripheral face 41 of the shaft 40 via the lubrication fluid J. A projection 74 is formed in the pivot shaft 10 so as to project from the opposing face 73 toward the outer peripheral face 41 of the shaft 40 to restrict flowing of the lubrication fluid J. COPYRIGHT: (C)2010,JPO&INPIT |
