Ultrasonic actuator for a linear ultrasonic motor and linear ultrasonic motor with an ultrasonic actuator

摘要

The actuator (1) has a friction path (8) or a friction rail arranged on a bridge bar (6). A main waveguide resonator (2) and an auxiliary waveguide resonator (4) are designed as an open linear waveguide for propagating acoustic standing wave effect on the bridge bar such that the bridge bar activates a drive shaft to drive an adjusting element (7). Length of the main waveguide resonator is equal to an integer multiple of half wavelength of the generated acoustic standing wave. Length of the auxiliary waveguide resonator is shifted spatially by a quarter wavelength of the generated wave. An independent claim is also included for a linear ultrasonic motor for driving an adjusting element.