| 摘要 |
PROBLEM TO BE SOLVED: To try to make torque lower, make exothermic heat lower, and make noises lower by preventing the elastic pieces of a retainer from interfering with a part of the inner circumferential surface of an outer race even at the time of high speed operations. SOLUTION: The outer circumferential side surface of an elastic piece 10a is made to be a surface inclined inwardly in the radial direction as it goes to the tip end. At the time of high speed operations under high temperature, even if the aforesaid elastic piece 10a is displaced outwardly toward the radial direction, the elastic piece 10a hardly interfers with the inner circumferential surface of an outer race 3. Otherwise, a reinforcing member is provided for a part of the retainer so as to let the elastic piece hardly be elastically deformed outwardly in the diametrical direction.
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