Traveling wave type ultrasonic motor of minitype column

Abstract

The invention discloses a traveling wave type ultrasonic motor of a minitype column. A stator is provided with an upper matching block of the stator and a lower matching block of the stator which are connected with a shaft; an upper piezoelectric ceramic plate and a lower piezoelectric ceramic plate are clamped between the upper matching block and the lower matching block of the stator; the upperpiezoelectric ceramic plate and the lower piezoelectric ceramic plate are both divided into four subregions; each subregion is mutually isolated from one another, and is polarized along the thicknessdirection of the ceramic, and the adjacent subregions are polarized reversely; the upper piezoelectric ceramic plate and the lower piezoelectric ceramic plate can be oppositely folded together according to the polarity; four electrodes are distributed between the upper piezoelectric ceramic plate and the lower piezoelectric ceramic plate; excitation voltage is applied to the piezoelectric ceramicthrough an electrode plate; an elastic rotor is arranged at upper end of the upper matching block of the stator; the elastic rotor is connected with the shaft through a bearing; the upper end of the bearing is provided with a fixed nut to be used as a shield cap; and a gasket is arranged between the fixed nut and the inner ring of the bearing. The traveling wave type ultrasonic motor of the invention can effectively solve combination problem of two-phase modality, features simpler structure, easy processing, better stability and convenient fixation, and is conducive to further micromation design of the motor.

Description

Technical field: [0001] The invention relates to a small cylindrical traveling wave ultrasonic motor, which belongs to the technical field of ultrasonic motor manufacturing. Background technique: [0002] The ultrasonic motor is a new type of micro motor that utilizes the inverse piezoelectric effect of piezoelectric ceramics and ultrasonic vibration, and the cylindrical traveling wave ultrasonic motor is a kind of traveling wave ultrasonic motor. The research on the cylindrical traveling wave ultrasonic motor started late. It adopts the Langevin vibrator structure, and the motor stator uses a metal matching block to lock the piezoelectric ceramic. The motor assembly does not require bonding, the assembly process is simple, the cost is low, and it is easy to automate. Production. The cylindrical traveling wave ultrasonic motor adopts the Langevin vibrator structure, which has high mechanical efficiency. The swinging movement of the stator is used to drive the rotor through...

AI Technical Summary

Problems solved by technology

The structure of the above method is complicated, and the processing of the connecting parts is difficult, which affects the miniaturization of the motor

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