| 摘要 |
PURPOSE:To prevent the abnormal abrasion between a rotor and a stator or the occurrence of noise even if high load is applied from outside to a driving system by setting the frictional force between a rotation member and a rotation output member smaller than the friction between a vibrator and the rotation member. CONSTITUTION:The frictional force of friction coupling between a rotor 6 and a rotation output member 7 is generated by a pressurizing spring 10, and the force is set to be smaller than the frictional force between a vibrating elastic body 1 and the rotor 6. That is, even if torque is given to the rotation output member 7 from outside, the rotor 6 never rotates since the frictional force to the stator is larger than the frictional force to the rotation output member 7, it follows that only the rotation output member 7 rotates. In case that high load is added to the rotation output member 7, the rotor 6 starts to slide to the rotation output member 7 before the rotation of the rotor 6 becomes unstable or the rotation stops, so the high load from the rotation output member 7 is never transmitted between the rotor 6. |
