A piezoelectric stick-slip linear motor

Abstract

The invention discloses a piezoelectric stick-slip linear motor, which comprises a bracket, wherein the bracket includes a first vertical column and a second vertical column which are parallel to eachother, the first vertical column and the second vertical column are provided with a shaft body, the shaft body is provided with a first limit body and a second limit body which are arranged in a spaced manner, the shaft body is sleeved with a tubular piezoelectric actuator and a flexible sleeve between the first limit body and the second limit body; the flexible sleeve includes a first rigid bodypreset on the piezoelectric actuator, a second rigid body preset on the second limit body and a flexible folding beam connected between the first rigid body and the second rigid body; the first rigidbody is sleeved with a moving sleeve; the outer diameter of the first rigid body is greater than those of the second rigid body, the second limit body, the flexible folding beam and the piezoelectricactuator. The invention has the advantages that the motor is simple and compact in overall structure; the flexible sleeve is of an integrated structure and avoids the assembly and adjustment process;the friction between the moving sleeve and the flexible sleeve can be adjusted; and the moving sleeve can generate strict linear motion.

Description

technical field [0001] The invention belongs to the field of nano-positioning technology, relates to a large-stroke, high-resolution precision displacement driver, in particular to a piezoelectric stick-slip linear motor. Background technique [0002] Piezoelectric stick-slip linear motor is a precision displacement driver that can realize both millimeter and centimeter-level large strokes and nanometer-level high resolution. It is based on the difference between the dynamic and static friction between the mover and the stator caused by the asymmetric vibration of the piezoelectric actuator under the action of the sawtooth wave voltage, and continuously accumulates the small displacement of the piezoelectric actuator to form a continuous large stroke displacement. Compared with electromagnetic linear motors, piezoelectric stick-slip linear motors have the advantages of no magnetic field, easy control, no end effects and thrust fluctuations; , Drive control is simple, and th...

AI Technical Summary

Problems solved by technology

[0003] 1) The overall structure of the motor is complex and not compact;

[0004] 2) The assembly and adjustment process of the mover and stator is complicated;

[0005] 3) The static friction between the mover and the stator is not easy to adjust;

[0006] 4) The mover has no guide during the movement process, and the movement precision is low

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