| 摘要 |
PURPOSE:To improve rotation's accuracy by forming a closed loop magnetic circuit using magnetic lubricating fluid, in combination of a cylindrical magnet and a pair of ball bearings. CONSTITUTION:Between two ball bearings 5, 6, a cylindrical magnet 16 is inserted as well as a magnetic lubricative fluid 24 is encapsulated, forming a closed loop magnetic circuit A. The magnetic lubricative fluid 24 attaches allways to the rolls 18, 21 and the slide face on the race, so that sufficient lubricating performance required for ball bearings 5, 6 is obtained as well as a uniform torque can be maintained allways. The rotation's accuracy in a device can be thus enhanced. |
