玉数を変えたときの運動および玉の自転すべり接触による運動への影響について (ラジアル玉軸受保持器の運動-3,4-)

概要

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Inquiring into the cause for the variation of angular velocity in running cages in the 2nd report, the author guessed how many balls were concerned in the motion of solid cages. From the results of the experiments on the motion of solid cages by change of the numbers of balls, in such a case as a radial ball bearing has 4 balls on the position of quarter in the pitch circle of ball or 2 balls on the bisection in the pitch circle of ball, it has been made clear that such a bearing has the same characteristics of the motion of solid cages as a ball bearing having 8 balls has, and solid cages generally oscillate twice in a revolution. Therefore, the author considers clearly that the numbers of balls concerned in the motion of solid cages are two on the symmetical positions in the pitch circle of ball. The effect on the motion of solid cages by the action of sliding contact of rotation of balls was experimented with a radial ball bearing that had radial clearances of C3. (As radial clearances of C3 are very large, a radial ball bearing has a large contact angle in the case of the thrust loading.) According to the results of the experiments, the state of the motion of solid cages of such bearings is the same as that of the bearing having the radial clearances of C2. Therefore, it is clearly found that the frictional forces caused by the sliding contact of rotation of balls do not affect the motion of solid cages.
信州大学工学部の論文