| 摘要 |
PURPOSE: To improve bearing efficiency by setting a ratio between a radius of curvature and a radius of a rolling element in a contact point with a rolling element on an inner race surface equally to that on an outer race surface for changing the contact point into a contact line. CONSTITUTION: In a rigid ball bearing, a diameter of curvature of a ball in a contact point on an inner race is 82.80 mm, for example. In the same contact point, a diameter of the ball is 12.70 mm. A ratio between both diameters is 6.520. A diameter 2, 2' of curvature in the ball contact point on an outer race is 60.80 mm while a diameter of curvature of the ball in the contact point is 9.326 mm, and a ratio between both diameters is 6.520. When a diameter of curvature in the contact point is set to a dimension found in diameter measurement, the contact point between the bearing and the race can be turned into a contact line, so that friction in the contact point can be greatly reduced and bearing efficiency can be improved. |
