| 摘要 |
PURPOSE:To reduce hysteresis torque when high torque is generated by making the size of fit of a cylindrical portion equal to the separator inside radius of a portion where a separator arm exists, and making the other portion larger than the size of the fit. CONSTITUTION:The radius of the inside 7 of a separator 3 fitted to the outer surface of a cylindrical portion 1b mounted on a hub 1 is larger than the size of fit to the cylindrical portion 1b, and projections 8 are disposed on the insides of portions where separator arms 8a exist. The inside 8a of the projection 8 is formed like a curved surface having a radius of the size of fit to the cylindrical portion 1b. Therefore, the separator 3 is slided to fit to the cylindrical portion 1b of the hub 1 only at the projections 8, and the other inside portion of the separator has a clearance to the cylindrical portion 1b of the hub 1, which results in that the frictional force between the hub 1 and the separator 3 will not increase so as to reduce hysteresis torque. |
