Piezoelectric micromotor based on multistage flexible amplification and driving method thereof

Abstract

The invention discloses a piezoelectric micromotor based on multistage flexible amplification and a driving method thereof, and belongs to the technical field of motors. The piezoelectric micromotor is specifically characterized in that an upper cover, a rotor, an expansion mechanism, a rotary flexible hinge, a threaded shaft and a base are sequentially laminated from top to bottom, the lower end of the threaded shaft is connected with the base through a bearing B, and the rotary flexible hinge is fixed to a shell; the upper cover is fixed at the upper part of the shell, and the base is fixed at the lower part of the shell; the rotor is hollow inside and stepped outside, the upper end of the rotor is connected with the upper cover through the bearing, and a certain gap exists between the lower end of the rotor and the expansion mechanism; the rotary flexible hinge drives the expansion mechanism to rotate, and the expansion mechanism drives the rotor to rotate. The beneficial effects of the invention are that a driving arm tightly holds the rotor and generates a rotation angle along with the rotor through the extension deformation of a piezoelectric stack, and the rotation motion is output under a continuous driving signal; the working range of the rotary micro-motor is increased by changing multiple working modes provided by the input signal, and the piezoelectric micromotor and the method have a wide application prospect.

Description

Technical field [0001] The present invention relates to a rotary micro motor, and more particularly to a multi-stage flexible amplify piezoelectric microscope and a driving method thereof. Background technique [0002] Precision driver technology has played an important role in the fields of micro robots, aerospace, medical devices, and precision positioning, and rotating drivers are a widely used precision drive. The piezoelectric material is used as an intelligent material because it is concerned and applied to the advantages of small size, fast response speed, no electromagnetic interference. Piezoelectric as a drive material is mainly used for micro robots, precision positioning, and rotating microograms, currently based on multi-stage flexible amplifying piezoelectric microdes relatively small. [0003] The Chinese invention patent publication of CN108964514 discloses a rotary micro motor driven by a piezoelectric and shape memory alloy, which includes a four-layer structure...

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Problems solved by technology

[0003] The Chinese invention patent with the publication number CN108964514 discloses a rotary micromotor driven by piezoelectricity and shape memory alloy and its driving method. However, it cannot be used as a micro-drive device suitable for a small space; at the same time, there is a complicated driver program that requires two different waveforms of drive signals to drive, which further increases the complexity of the micro-motor

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