CN101272108A - In-plane composite mode straight line ultrasound electric motor of square transducer - Google Patents
In-plane composite mode straight line ultrasound electric motor of square transducer Download PDFInfo
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- CN101272108A CN101272108A CNA200810027876XA CN200810027876A CN101272108A CN 101272108 A CN101272108 A CN 101272108A CN A200810027876X A CNA200810027876X A CN A200810027876XA CN 200810027876 A CN200810027876 A CN 200810027876A CN 101272108 A CN101272108 A CN 101272108A
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- piezoelectric ceramic
- straight line
- oscillator
- ultrasound electric
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Abstract
The invention discloses a square vibration generator in-plane compound mode linear ultrasonic motor which includes a frame, an active cell, a vibration generator and a pretension mechanism. A slide seat is fixed in the frame; the mover is movably arranged at the slide seat; the vibration generator comprises a square metal elastic plate, a square piezoelectric ceramic plate and a dial gear; the metal elastic plate and the piezoelectric ceramic plate are fixedly connected; the dial gear is fixedly connected with the middle position of the side surface along the length directions of the metal elastic plate and the piezoelectric ceramic plate; the dial gear is contacted with the active cell; the top surface of the vibration generator is contacted with the pretension mechanism. The motor is easy to design and can lead the resonance frequency of in-plane bending vibration to reach an expected value easily so as to generate bending vibration simultaneously at an expected frequency; the motor has the advantage of simple and compact structure, which is thin, convenient to assemble and works reliably.
Description
Technical field
The present invention relates to utilize the motor of piezoelectric effect, particularly a kind of square transducer in-plane composite mode straight line ultrasound electric motor.
Background technology
Ultrasound electric machine is the electrical micro-machine that utilizes piezoelectric ceramic inverse piezoelectric effect and ultrasonic vibration.It is generally by oscillator, mover (or rotor) and compress mechanism in advance and form, and wherein oscillator is formed by piezoelectric ceramic piece or piezoelectric ceramic piece and metallic elastic bluk recombination usually.
The linear ultrasonic motor of common complex vibration pattern all utilizes the first rank stretching vibration mode and the second rank flexural vibration mode of rectangle oscillator, make its particle do elliptic motion in the end of thrust, but utilize the linear ultrasonic motor of the flexible and second rank flexural vibration mode in first rank, its rectangle oscillator planform must satisfy the necessary size condition, so that the first rank stretching vibration is consistent with the frequency of the second rank flexural vibrations, increased the difficulty of design, the occasion of strict demand is especially arranged in the structural volume of motor, and the application of this motor also is restricted.
Summary of the invention
The present invention provides a kind of simple in structure in order to overcome the deficiency that above prior art exists, and is convenient to the square transducer in-plane composite mode straight line ultrasound electric motor of reliable operation is installed.
Purpose of the present invention realizes by following technical scheme: this square transducer in-plane composite mode straight line ultrasound electric motor, it is characterized in that: comprise frame, mover, oscillator and pre-tightening mechanism, the frame internal fixation has slide, mover movably is installed on the slide, oscillator comprises foursquare metallic elastic plate, foursquare piezoelectric ceramic piece and moving tooth, the metallic elastic plate is fixedlyed connected with piezoelectric ceramic piece, fixedly connected moving tooth in the centre position of the side of metallic elastic plate and piezoelectric ceramic piece, moving tooth contacts with mover, and the end face of oscillator contacts with pre-tightening mechanism.
Described metallic elastic plate and piezoelectric ceramic piece are pasted fixing, paste fixedly moving tooth in the centre position of a side of metallic elastic plate and piezoelectric ceramic piece.
The metallic elastic plate of described oscillator and the center of piezoelectric ceramic piece have a through hole.
Described through hole is circular or square.
Described mover is a line slide rail.
Described pre-tightening mechanism comprises pretension screw, baffle plate, two springs and adjusts piece, the end face of oscillator contacts with the bottom surface of adjusting piece, and the end face of adjusting piece has two cylinders, and two springs are placed in two cylinders, baffle plate is placed on the spring upper end, and the pretension screw is installed on the upper cover plate of frame and contacts with baffle plate.
Be fixed with the oscillator guide holder by double-screw bolt in the described frame, oscillator is positioned in the oscillator guide holder.
The upper and lower surface of described piezoelectric ceramic piece all scribbles the electrode for polarization and excitation usefulness, the electrode of upper surface is divided into the polarized area of four symmetries along foursquare two center lines, two adjacent polarized areas polarize along piezoelectric ceramic piece thickness direction forward, two other polarized area is along the reverse polarization of piezoelectric ceramic piece thickness direction, the electrode of lower surface is subregion not, and lower surface is pasted on the metallic elastic plate.
Described electrode is silver-plated electrode.
In described four polarized areas, two polarized areas at diagonal angle connect sin ω t pumping signal line, and two other polarized area connects cos ω t pumping signal line, and lower surface connects common ground.
The operation principle of square transducer in-plane composite mode straight line ultrasound electric motor of the present invention is as follows:
The moving tooth of oscillator contacts with mover, adjusts pretightning force by pretension screw and spring.Utilize the d of piezoelectric ceramic piece
31Effect, oscillator is to motivate oscillator under the 90 alternating current effects of spending respectively with frequency, phase difference are the 90 winding complex vibrations of spending frequently or closely at phase difference, winding complex vibration forms the track of elliptic motion at moving tooth microcosmic particle place, adjust the pretightning force that contacts of moving tooth and mover by pretension screw and spring, and then make mover under the effect of contact pretightning force, rely on frictional drive to produce required rectilinear motion.By changing forward and reverse motion that phase place realizes mover.
The present invention has following advantage with respect to prior art:
One, design of electrical motor is easy: since square transducer X, Y to full symmetrical configuration, identical or close around the X-axis flexural vibrations with frequency around the flexural vibrations of Y-axis, do not need special length-width ratio to obtain the unanimity of frequency, only by changing foursquare piezoelectric ceramic piece and the length of side of foursquare metallic elastic plate or their thickness, make the resonance frequency of winding vibration in the face reach desired value easily, so that can under expected frequence, produce winding resonance simultaneously;
Two, electric machine structure is simple compact, slim, easy to assembly, because oscillator is that the metallic elastic plate is fixedlyed connected and moving tooth with piezoelectric ceramic piece, avoids the problem of existing simple piezoelectric ceramic vibrator embrittlement, and functional reliability increases.Directly realize the rectilinear motion of mover, make that littler, the forward and reverse motion of drive system volume is switched flexibly, performance is consistent, can be widely used in fields such as instrument and meter, information industry, national defence and medical science.
Three, the center of the metallic elastic plate of oscillator and piezoelectric ceramic piece has a through hole, and to improve the moving tooth Oscillation Amplitude, vibrating effect is better, and motor performance is better.
Description of drawings
Fig. 1 is the structural representation of a kind of square transducer in-plane composite mode straight line ultrasound electric motor of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the B-B cutaway view of Fig. 1.
Fig. 4 is the upward view of the oscillator of Fig. 1.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As Fig. 1, Fig. 2 and square transducer in-plane composite mode straight line ultrasound electric motor shown in Figure 3, comprise frame 1, the mover 2 of power output, the oscillator 3 of excitation ultrasonic vibration and the pre-tightening mechanism that applies precompression, mover 2 is a line slide rail, frame 1 internal fixation has slide 11, mover 2 movably is installed on the slide 11, oscillator 3 comprises foursquare metallic elastic plate 30, foursquare piezoelectric ceramic piece 31 and moving tooth 32, metallic elastic plate 30 and piezoelectric ceramic piece 31 are pasted fixing, fixedly moving tooth 32 is pasted in centre position in the side of metallic elastic plate 30 and piezoelectric ceramic piece 31, moving tooth 32 contacts with mover 2, and the end face of oscillator 3 contacts with pre-tightening mechanism.Be fixed with oscillator guide holder 9 by double-screw bolt 8 in the frame 1, oscillator 3 is positioned in the oscillator guide holder 9.
Pre-tightening mechanism comprises pretension screw 4, baffle plate 5, two springs 6 and adjusts piece 7, the end face of oscillator 3 contacts with the bottom surface of adjusting piece 7, the end face of adjusting piece 7 has two cylinders 70, two springs 6 are placed in two cylinders 70, baffle plate 5 is placed on spring 6 upper ends, and pretension screw 4 is installed on the upper cover plate 10 of frame 1 and contacts with baffle plate 5.
The metallic elastic plate 30 of oscillator 3 and the center of piezoelectric ceramic piece 31 have a manhole 33, and to improve moving tooth 32 Oscillation Amplitudes, vibrating effect is better, and motor performance is better.
The upper and lower surface of piezoelectric ceramic piece 31 all scribbles the silver-plated electrode for polarization and excitation usefulness, the silver-plated electrode of upper surface is divided into the polarized area of four symmetries along foursquare two center lines, two adjacent polarized areas polarize along piezoelectric ceramic piece thickness direction forward, two other polarized area is along the reverse polarization of piezoelectric ceramic piece thickness direction, the silver-plated electrode of lower surface is subregion not, and lower surface is pasted on metallic elastic plate 30.In four polarized areas, two polarized areas at diagonal angle connect sin ω t pumping signal line, and two other polarized area connects cos ω t pumping signal line, and lower surface connects common ground.The metallic elastic plate 30 of oscillator 3 and the center of piezoelectric ceramic piece 31 have a through hole 33, and amplitude is bigger, and vibrating effect is better.
The operation principle of this motor: the moving tooth 32 of oscillator 3 contacts with mover 2, adjusts pretightning force by pretension screw 4 and spring 6.Utilize the d of piezoelectric ceramic piece
31Effect, oscillator 3 is to motivate oscillator 3 under the 90 alternating current effects of spending respectively with frequency, phase difference are the 90 winding complex vibrations of spending frequently or closely at phase difference, winding complex vibration forms the track of elliptic motion at moving tooth 32 microcosmic particle places, adjust the pretightning force that contacts of moving tooth 32 and mover 2 by pretension screw 4 and spring 6, and then make mover 2 under the effect of contact pretightning force, rely on frictional drive to produce required rectilinear motion.By changing forward and reverse motion that phase place realizes mover 2.
During whole machine installation, earlier mover 2 is installed on the frame 1, by double-screw bolt 8 oscillator guide holder 9 is fixed on the frame 1, the oscillator 3 that assembles is packed into along oscillator guide holder 9, pack into successively then and adjust piece 7, spring 6, baffle plate 5 and pretension screw 4, apply pretightning force by pretension screw 4,, can make oscillator 3 operate as normal when binding post inserts suitable external excitation signal source.
Above-mentioned embodiment is the preferred embodiments of the present invention; can not limit claim of the present invention; other any change or other equivalent substitute mode that does not deviate from technical scheme of the present invention and made is included within protection scope of the present invention.
Claims (10)
1, square transducer in-plane composite mode straight line ultrasound electric motor, it is characterized in that: comprise frame, mover, oscillator and pre-tightening mechanism, the frame internal fixation has slide, mover movably is installed on the slide, oscillator comprises foursquare metallic elastic plate, foursquare piezoelectric ceramic piece and moving tooth, the metallic elastic plate is fixedlyed connected with piezoelectric ceramic piece, fixedly connected moving tooth in the centre position of the side of metallic elastic plate and piezoelectric ceramic piece, moving tooth contacts with mover, and the end face of oscillator contacts with pre-tightening mechanism.
2, square transducer in-plane composite mode straight line ultrasound electric motor according to claim 1, it is characterized in that: described metallic elastic plate and piezoelectric ceramic piece are pasted fixing, paste fixedly moving tooth in the centre position of a side of metallic elastic plate and piezoelectric ceramic piece.
3, in-plane buckling composite mode thin type straight line ultrasound electric machine according to claim 1 is characterized in that: the metallic elastic plate of described oscillator and the center of piezoelectric ceramic piece have a through hole.
4, in-plane buckling composite mode thin type straight line ultrasound electric machine according to claim 3 is characterized in that: described through hole is for circular or square.
5, square transducer in-plane composite mode straight line ultrasound electric motor according to claim 1 is characterized in that: described mover is a line slide rail.
6, square transducer in-plane composite mode straight line ultrasound electric motor according to claim 1, it is characterized in that: described pre-tightening mechanism comprises pretension screw, baffle plate, two springs and adjusts piece, the end face of oscillator contacts with the bottom surface of adjusting piece, the end face of adjusting piece has two cylinders, two springs are placed in two cylinders, baffle plate is placed on the spring upper end, and the pretension screw is installed on the upper cover plate of frame and contacts with baffle plate.
7, square transducer in-plane composite mode straight line ultrasound electric motor according to claim 1 is characterized in that: be fixed with the oscillator guide holder by double-screw bolt in the described frame, oscillator is positioned in the oscillator guide holder.
8, square transducer in-plane composite mode straight line ultrasound electric motor according to claim 2, it is characterized in that: the upper and lower surface of described piezoelectric ceramic piece all scribbles the electrode for polarization and excitation usefulness, the electrode of upper surface is divided into the polarized area of four symmetries along foursquare two center lines, two adjacent polarized areas polarize along piezoelectric ceramic piece thickness direction forward, two other polarized area is along the reverse polarization of piezoelectric ceramic piece thickness direction, the electrode of lower surface is subregion not, and lower surface is pasted on the metallic elastic plate.
9, square transducer in-plane composite mode straight line ultrasound electric motor according to claim 8 is characterized in that: described electrode is silver-plated electrode.
10, square transducer in-plane composite mode straight line ultrasound electric motor according to claim 8, it is characterized in that: in described four polarized areas, two polarized areas at diagonal angle connect sin ω t pumping signal line, and two other polarized area connects cos ω t pumping signal line, and lower surface connects common ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810027876XA CN101272108B (en) | 2008-05-05 | 2008-05-05 | In-plane composite mode straight line ultrasound electric motor of square vibrator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810027876XA CN101272108B (en) | 2008-05-05 | 2008-05-05 | In-plane composite mode straight line ultrasound electric motor of square vibrator |
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| CN101272108A true CN101272108A (en) | 2008-09-24 |
| CN101272108B CN101272108B (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810027876XA Expired - Fee Related CN101272108B (en) | 2008-05-05 | 2008-05-05 | In-plane composite mode straight line ultrasound electric motor of square vibrator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976969A (en) * | 2010-10-18 | 2011-02-16 | 南京航空航天大学 | Linear buckling ultrasonic motor and electric excitation mode thereof |
| CN106793287A (en) * | 2016-12-15 | 2017-05-31 | 电子科技大学 | A kind of LED illumination circuit generated electricity based on human pressure |
| CN110224631A (en) * | 2019-07-05 | 2019-09-10 | 复旦大学 | Piezoelectric ceramic motor mover assembles device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2697945Y (en) * | 2003-08-07 | 2005-05-04 | 华南农业大学 | Straight line piezoelectric micromotor with large thrust column shape oscillator |
| CN101001054B (en) * | 2006-12-26 | 2011-06-22 | 华南农业大学 | Double-cylinder vibrator linear ultrasonic motor |
-
2008
- 2008-05-05 CN CN200810027876XA patent/CN101272108B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976969A (en) * | 2010-10-18 | 2011-02-16 | 南京航空航天大学 | Linear buckling ultrasonic motor and electric excitation mode thereof |
| CN106793287A (en) * | 2016-12-15 | 2017-05-31 | 电子科技大学 | A kind of LED illumination circuit generated electricity based on human pressure |
| CN110224631A (en) * | 2019-07-05 | 2019-09-10 | 复旦大学 | Piezoelectric ceramic motor mover assembles device |
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| Publication number | Publication date |
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| CN101272108B (en) | 2011-08-17 |
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Granted publication date: 20110817 Termination date: 20170505 |