Multi-shaft four-stator-rotor series ultrasonic motor

Abstract

The multi-shaft four-stator-rotor series connection ultrasonic motor comprises a shell, a front stator base is installed at the front end of the shell, and a rear stator base is installed at the rear end of the shell; a first stator-rotor series assembly and a second stator-rotor series assembly are sequentially arranged between the front stator seat and the rear stator seat, and the first stator-rotor series assembly and the second stator-rotor series assembly are coaxially arranged on the shell; the first stator-rotor series assembly and the second stator-rotor series assembly are respectively provided with a first output shaft and a second output shaft which are independent; the first output shaft and the second output shaft are connected through a spline; a PCB, a PCB cover shell and a cable fixing sleeve are arranged on the plane of one side of the shell, flexible printed boards on the first stator and rotor series assembly and the second stator and rotor series assembly are led out and then welded to the PCB, and finally wires are led out from the PCB in a unified mode. According to the invention, the independent stator and rotor series assemblies are adopted to output torque and rotating speed together, the structure is compact, and the motor has the advantages of large output torque, large power and simple assembly and debugging.

Description

technical field [0001] The invention relates to a multi-axis 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 ...

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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