关键词: 直线超声电机, 夹持元件, 柔性铰链, 结构稳定性

Abstract:

A new clamping component was put forward for a linear ultrasonic motor, which had circular flexible hinges on both sides and in the middle. The flexible hinges on both sides acted as the mechanical spring to exert proper pre-pressure; the flexible hinge in the middle was designed to eliminate the subsidiary stress in the stator and to reduce the impact on vibration modal of the stator. The research results show the relationship between the distortion of flexible hinges and the pre-pressure is linear by using finite element method.  Experimental results are found that the displacement of the clamping components is of linear relation with the pre-pressure, which coincides with the calculated results. In conclusion, the two phase modal of the stator assembled by the clamping components coincides well. The stator has no interference modal, and has linear boundary conditions.

Key words: linear ultrasonic motor, clamping component, flexible hinge, structural stability