| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure which is easily manufactured, has low cost, and in which misalignment of a pair of bearing rings is suppressed using positioning members that are inserted into and fitted in positioning holes formed in the pair of bearing rings.SOLUTION: Double-row angular ball bearings 1, 1for a CT scanner device are provided in which internal members 3, 3are formed from a pair of bearing rings 3a, 3a, positioning holes 13a, 13b are provided in a pair of the bearing rings, the misalignment of a pair of the bearing ring in a radial direction is suppressed by inserting positioning members 14 into the positioning holes thereby fitting the members 14 in the holes, and both of the bearing ring are fastened together with a large number of fixing bolts 16. In the double-row angular ball bearings, end faces 10a, 10b which oppose to each other of a pair of the bearing rings are formed in flat faces, the end faces abut on each other by being fastened with the fixing bolts 16, a stationary position preload is thereby imparted between balls 4 and raceway surfaces 6, 7, and when a diameter of the ball 4 is set as Db, and a radial direction dimension from a center of the ball up to an inside diameter of the internal member is set as h, a relationship of Db/h≤0.26 is satisfied.SELECTED DRAWING: Figure 1 |
