A travelling wave ultrasonic clutch by the coupling of longitudinal and bending vibration modes

2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2015-10-01 DOI:10.1109/SPAWDA.2015.7364518

Ting-hai Cheng, Liang Wang, Pu He, Xiaoyu Liu, Dong Zhu

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Abstract

A travelling wave ultrasonic by the clutch coupling longitudinal and bending vibration modes is proposed to improve the output performance of the current ultrasonic clutch. The proposed ultrasonic clutch mechanism is a crucial component and it mainly includes a driving friction plate, a slave friction plate, driving and slave Langevin transducers, driving and driven shafts. The proposed ultrasonic clutch has the connection and disconnection function. In addition, a driving travelling wave is generated by compositing the longitudinal and bending vibration modes of transducer and friction plate for realizing the regulation of output performance. The matching frequencies of two vibration modes are obtained by modal simulation analysis using finite element method. A prototype of ultrasonic clutch is manufactured and the vibration characteristics are tested. The results indicate that the travelling wave ultrasonic clutch coupling by longitudinal and bending vibration modes is feasible.

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一种纵向和弯曲振动耦合的行波超声离合器

为了提高现有超声离合器的输出性能，提出了一种采用离合器纵向和弯曲耦合振动方式的行波超声。所提出的超声离合器机构是其关键部件，主要包括驱动摩擦片、从摩擦片、主从朗万换能器、驱动和从动轴。所提出的超声波离合器具有连接和断开功能。此外，将换能器与摩擦片的纵向振动和弯曲振动组合产生驱动行波，实现对输出性能的调节。采用有限元法进行模态仿真分析，得到了两种振型的匹配频率。制作了超声离合器样机，并对其振动特性进行了测试。结果表明，行波超声离合器采用纵、弯两种振动方式耦合是可行的。

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2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)

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