Parallel bearingless co-rotating standing wave linear ultrasonic motor

Abstract

The invention provides a parallel bearingless co-rotating standing wave type linear ultrasonic motor. The motor comprises a stator and a rotor, and the rotor comprises an inner rotor and an outer rotor. The inner rotor and the outer rotor are fixed together, and the stator is arranged between the inner rotor and the outer rotor. The stator comprises a plurality of stator units and a mouse cage type fixing structure. Each stator unit comprises an elastic body, a left-end piezoelectric ceramic and a right-end piezoelectric ceramic. Each elastic body adopts an arc-shaped structure, and the two ends of each elastic body are respectively provided with the corresponding left-end piezoelectric ceramic and the corresponding right-end piezoelectric ceramic. Two inner driving feet are arranged on the inner surface of each elastic body and make contact with the inner rotor, and two outer driving feet are arranged on the outer surface of each elastic body and make contact with the outer rotor, wherein the inner driving feet and the outer driving feet deviate from stator unit standing wave node positions in the same direction and at the same radian. Compared with a currently popular linear ultrasonic motor, the motor is free of bearings and compact in structure, employs a mode that double rotors rotate and drive in the same direction, and achieves the double output.

Description

technical field [0001] The invention relates to a parallel bearingless co-rotating standing wave linear ultrasonic motor. Background technique [0002] There are two types of standing wave linear ultrasonic motors, one is a composite mode motor, and the other is a single mode motor. When the former works, there are two modes in the stator, so its structural design is relatively complicated. When the latter works, only one mode is used, so the design is relatively simple, but its driving direction is unidirectional. The stator structure of the standing wave linear ultrasonic motor is generally a straight line, and its output is also generally a straight line. [0003] At present, the existing standing wave linear ultrasonic motors have the problems of relatively complicated structural design or difficulty in achieving co-rotation. [0004] The above problems should be considered and solved in the design process of the standing wave linear ultrasonic motor. Contents of the...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a parallel bearingless co-rotating standing wave linear ultrasonic motor to solve the problems existing in the prior art or the structural design is relatively complicated, or it is difficult to realize co-rotation

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