| 摘要 |
PURPOSE: To facilitate assembly work by providing a fluid bearing in a semispherical shape capable of simultaneously reducing frictional resistance by axial direction force and radial direction force in a head drum. CONSTITUTION: One side end part of a shaft 30 is inserted to the through-hole 11 of a first drum 10 and the drum 10 is fixed to the shaft 30. A flange 31 is fixed to the other side end part of the shaft 30 and the fluid bearing 40 in the semispherical shape provided with a small diameter part 45 and a large diameter part 46 is fixed to the flange 31 by a bolt 39. Thus, the center part of the fluid bearing 40 is fixed to the shaft 30 and a groove 41 is formed on the outer peripheral surface of the body 42 of the fluid bearing 40 so as to interpose lubricant like air and oil, etc. It is desirable to provide the two fluid barings 40 as one pair as shown in the figure and they are provided so as to make the small diameter parts 45 of the respective bearings 40 face each other. |
