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

摘要：

设计了一种带有柔性铰链的直线超声电机夹持元件,夹持元件的两边和中间带有圆弧柔性铰链。两边的柔性铰链起弹簧作用,以便施加合适的预压力;中间的柔性铰链能够消除定子装配中的附加应力,减小定子装配对定子振动模态的影响。利用有限元方法分析了柔性铰链的变形量与预压力的关系。实验结果表明,直线超声电机夹框的位移与预压力成线性关系,并与有限元计算结果一致。柔性夹持元件装配的定子没有干扰模态,两相模态一致性好,并具有线性的边界条件。

关键词: 直线超声电机, 夹持元件, 柔性铰链, 结构稳定性