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External Ratchet Piezo Driver

A piezoelectric driver, ratchet-type technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of high cost and complex drive control system, and achieve The effect of low cost, simple mechanical structure and simplified drive control system

Inactive Publication Date: 2017-01-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new type of external ratchet piezoelectric driver to solve the problem that the existing piezoelectric inertial precision driver can only use asymmetrical waveform electrical signals as the driving signal, the driving control system is complicated and the cost is high

Method used

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  • External Ratchet Piezo Driver
  • External Ratchet Piezo Driver
  • External Ratchet Piezo Driver

Examples

Experimental program
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Effect test

Embodiment Construction

[0019] refer to figure 1 , figure 2 and image 3 , the external ratchet piezoelectric driver of the present invention is mainly composed of outer wheel (1), spring (2), bearing (3), fixed main shaft (4), key (5), ratchet (6), pawl (7), tight Composed of firmware (8), piezoelectric bimorph (9), and substrate (10). When assembling, first fix the end of the fixed main shaft (4) with an external thread on the base plate (10); put the key (5) into the keyway on the fixed main shaft (4), and then make the structure into a spoke type The ratchet (6) is fixed on the fixed main shaft (4) by means of a keyed connection with the fixed main shaft (4); the bearing (3) is installed on the fixed main shaft (4), and then the outer wheel (1) is The connection method is installed on the bearing (3), and the two ends of the bearing (3) should be in full contact with the end face of the fixed main shaft (4) and the shoulder of the outer wheel (1) without leaving a gap; connect the pawls (7) t...

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Abstract

The invention relates to an external ratchet wheel type piezoelectric actuator. The actuator is mainly composed of an outer wheel, a fixing main shaft, a ratchet wheel, a pawl and a piezoelectric bimorph. The ratchet wheel is connected with and fixedly installed on the fixing main shaft through a key, and the outer wheel is assembled on the fixing main shaft through a bearing. The ratchet wheel is of a spoke type structure. A metal substrate and a piezoelectric wafer are bonded to form the piezoelectric bimorph so that a ratchet wheel spoke part symmetric in appearance can be formed. A drive element, namely a piezoelectric bimorph oscillator, takes a symmetrical square wave as an excitation signal, and the piezoelectric bimorph oscillator quickly deforms to generate periodical two-way impact force so that the ratchet wheel can slightly swing in two directions, and accordingly the outer wheel is driven to rotate in one direction through a ratchet wheel transmission mechanism, and the precise actuator rotating directionally is formed. The actuator has the advantages of being simple in mechanical structure, low in cost, easy to control, high in resolution ratio and the like.

Description

technical field [0001] The invention belongs to the field of piezoelectric precision mechanical drive and relates to a novel piezoelectric precision driver. Background technique [0002] Piezoelectric drivers using piezoelectric elements have the advantages of large stroke, high resolution, compact structure, good response characteristics, no electromagnetic interference, and easy control. and other fields are increasingly widely used. [0003] In recent years, research on piezoelectric actuators, especially piezoelectric inertial impact drivers that use piezoelectric bimorphs as drive units, has shown a vigorous development trend. Asymmetrical electrical signals are used to excite piezoelectric bimorphs to produce different impact forces to form actuators. For directional motion, due to the use of asymmetric signal excitation, the drive control system is more complicated, which is not conducive to micro-integration, and the cost is relatively high. [0004] In view of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/06H02N2/04
Inventor 刘国君杨旭豪杨志刚刘建芳李新波于辉吴越
Owner JILIN UNIV