ROTATING ELECTRIC MACHINE ROTOR AND ROTATING ELECTRIC MACHINE

To suppress that it is difficult to prevent a torque from being transmitted to at least one of a first shaft member and a second shaft member without increasing the size in the axial direction of a cylindrical member.SOLUTION: A friction coefficient between a first shaft member 18, a second shaft member 19, and the inner peripheral surface 16a of a cylindrical member 16 is larger than a friction coefficient between a permanent magnet 17 and the inner peripheral surface 16a of the cylindrical member 16. Therefore, for example, as compared with a case in which the friction coefficient between the first shaft member 18, the second shaft member 19, and the inner peripheral surface 16a of the cylindrical member 16 is equal to or lower than the friction coefficient between the permanent magnet 17 and the inner peripheral surface 16a of the cylindrical member 16, the fastening force (slip torque) between the first shaft member 18, the second shaft member 19, and the cylindrical member 16 is large. Therefore, even when the tightening margin of the inner peripheral surface 16a of the cylindrical member 16 with respect to the first shaft member 18 and the second shaft member 19 is reduced, the slip torque is suppressed from being reduced.SELECTED DRAWING: Figure 3 【課題】筒部材の軸方向に大型化することなく、第１軸部材及び第２軸部材の少なくとも一方へトルクが伝達され難くなってしまうことを抑制すること。【解決手段】第１軸部材１８及び第２軸部材１９と筒部材１６の内周面１６ａとの間の摩擦係数が、永久磁石１７と筒部材１６の内周面１６ａとの間の摩擦係数よりも大きい。よって、例えば、第１軸部材１８及び第２軸部材１９と筒部材１６の内周面１６ａとの間の摩擦係数が、永久磁石１７と筒部材１６の内周面１６ａとの間の摩擦係数以下である場合に比べて、第１軸部材１８及び第２軸部材１９と筒部材１６との間の締結力（スリップトルク）が大きくなる。したがって、第１軸部材１８及び第２軸部材１９に対する筒部材１６の内周面１６ａの締め代が小さくなっても、スリップトルクが小さくなることが抑制される。【選択図】図３