| 摘要 |
PURPOSE:To prevent oscillation by moving an outer wheel of the bearing inserted to either one end of the rotary shaft to thrust direction in a supporter, and providing a pre-pressurizing to the outer wheel to the thrust direction, consequently increasing natural oscillation of the bearing part of a rotary shaft. CONSTITUTION:When an outer wheel is pressed downward with a compressing coil spring 11, a radial partial pressure and clearance produced in bearings 5a and 5b are kept constant. When a thrust weight is exerted to a rotary shaft 1, the outer wheel of the upper bearing 5a is suitably moved in the thrust direction and the weight is absorbed by the spring 11 depressing the outer wheel of the bearing 5a. Thus, the radial partial pressure and clearance of the bearings 5a and 5b are kept constant, allowing to increase the specific oscillation of the bearings 5a and 5b inserted to both ends 4a and 4b of the rotary shaft 1. |
