| 摘要 |
PROBLEM TO BE SOLVED: To provide a thrust ball bearing designing method for easily designing a proper-size bearing. SOLUTION: The method of designing a thrust bearing is characterized in that two bearing rings 10, 11 having relative scrolling motions and a plurality of balls 12 laid between both bearing rings 10, 11, both bearing rings 10, 11 having mutually opposed surfaces provided with two circular raceway grooves 13, 14, respectively, in peripherally spaced relation, the corresponding two raceway grooves 13, 14 of both bearing rings 10, 11 each containing one ball 12. Assuming that a basic dynamic rated load per a pair of raceway grooves is taken as a predetermined equation (a-1) and a rated life per a pair of raceway grooves is taken as a predetermined equation (a-2) with r being the groove radius of each of the raceway grooves 13, 14, Da being the diameter of the ball 12, Z being the number of the balls and dm being the pitch circle diameter of the ball 12, the diameter Da of the ball 12, the number Z of the balls and the pitch circle diameter dm of the ball 12 are determined so that the rated life L10 of the whole bearing represented by a predetermined equation (a-3) using both equations (a-1) (a-2) is a preset value or more. |
