| 摘要 |
PURPOSE:To achieve easy fitting and dismounting by performing centering through utilization of an automatic centering ball bearing having spherical outer-ring raceway surface such that the inner ring of bearing will incline upon insertion of the rotary shaft. CONSTITUTION:When fitting the rotary shaft 30 of collected elements into an automatic-centering ball bearing 24, the inner ring will incline upon advance of the tip section of the rotary shaft 30 into the inner ring of said bearing 24 thus to align the centers even if the center of the rotary shaft 30 is not aligned accurately with that of said bearing 24. Consequently, the rotary shaft 30 will fit smoothly into the inner ring of said bearing 24 to apply no excessive force laterally against the machine frame 10 thereby the rotary shaft 30 can also be dismounted smoothly from said bearing 24. |
