Four-stator-rotor series ultrasonic motor

Abstract

The invention relates to a four-stator-rotor series connection ultrasonic motor which comprises a middle stator base, the middle stator base is coaxially arranged on a shell, a bearing is arranged in an inner cylindrical hole of the middle stator base, and a stator elastomer assembly is coaxially arranged on the end face of an inner side boss; the output shaft penetrates through a bearing on the middle stator seat and is fixed on an inner ring of the bearing by using a locking nut; two flexible rotor assemblies are coaxially arranged on the two end faces of a flange plate in the middle of the output shaft respectively, the two flexible rotor assemblies at each end are installed in a back-to-back mode, and adjusting gaskets are arranged between the flexible rotor assemblies and between the flexible rotor assemblies and the flange end faces of the output shaft. Stator elastomer assemblies are coaxially arranged on the surfaces of bosses on the inner sides of stator bases coaxially installed at the two ends of the shell. A PCB, a PCB cover shell and a cable fixing sleeve are arranged on the plane of one side of the shell, a flexible printed board on the stator elastomer assembly is welded to the PCB, and a wire is led from the PCB. The motor has the characteristics of high output torque, high power, compact structure and the like.

Description

technical field [0001] The invention relates to a four stator-rotor series ultrasonic motor, which belongs to the technical field of ultrasonic motors. Background technique [0002] The rotary traveling wave ultrasonic motor is limited by the working principle, piezoelectric ceramic sheets and the inherent mode of the stator itself, resulting in limited output speed and torque. The single stator and rotor rotating traveling wave ultrasonic motor cannot achieve high output power. Therefore, In order to improve the output power, the rotary traveling wave ultrasonic motor in the prior art is mainly realized by using several ultrasonic motors (or stator and rotor assemblies) in series coaxially. [0003] In the current patents, literature and products on the market, ultrasonic motors with double stators and rotors in series are more common, such as the series ultrasonic motor proposed by utility model patent US4937488A, and a new dual stator and rotor ladder proposed by utility ...

AI Technical Summary

Problems solved by technology

[0004] In the existing rotary traveling wave ultrasonic motor technology, there are also ultrasonic motors with two or more stators and rotors connected in series coaxially, such as a rotary traveling wave ultrasonic motor that can coaxially connect n stator and rotor assemblies mentioned in our company's patent number CN208369491U , currently transformed into an actual product of 60 single-shaft four-stationary-rotor series ultrasonic motor products, the maximum output power can reach 40W, and the maximum output torque can reach 5 N m. It is very convenient, and more stator and rotor assemblies can be connected in series at the same time, but due to the existence of movable webs, the envelope size of the entire motor is relatively large and not compact enough

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