CN101630925B - Square rotary ultrasonic motor oscillator - Google Patents
Square rotary ultrasonic motor oscillator Download PDFInfo
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- CN101630925B CN101630925B CN2009103060516A CN200910306051A CN101630925B CN 101630925 B CN101630925 B CN 101630925B CN 2009103060516 A CN2009103060516 A CN 2009103060516A CN 200910306051 A CN200910306051 A CN 200910306051A CN 101630925 B CN101630925 B CN 101630925B
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Abstract
The invention discloses a square rotary ultrasonic motor oscillator, which relates to an ultrasonic motor oscillator and aims at solving the problem that mechanical output capacity of the prior ultrasonic motor stator is limited. The square rotary ultrasonic motor oscillator consists of four front end covers, eight pairs of piezoelectric ceramics, four flanges, four pretightening studs, an insulating sleeve and an electrode plate, wherein each front end cover comprises two amplitude rods and a drive foot, the drive foot is a cylinder, two amplitude rods are orthogonally arranged, the drive foot is connected with the small end surfaces of the two amplitude rods, and the amplitude rods and the drive foot are an integral component; the pretightening studs pass through a flange through a square hole at the centre of the flange and are fixedly connected with big end surfaces of the two adjacent amplitude rods through threads at the two ends, and a pair of piezoelectric ceramics is sleeved on the stud between the amplitude rods. Body central lines of four drive feet form four square angle points through crossing axial lines of the four pretightening studs, therefore, the invention can be applied to the manufacture field of the ultrasonic motor.
Description
Technical field
The present invention relates to a kind of ultrasonic motor oscillator, be specifically related to rotary ultrasonic motor oscillator.
Background technology
Piezoelectric ultrasonic motor is a kind of inverse piezoelectric effect of utilizing piezoelectric ceramic; In elastomer, motivate the vibration in the supersonic range; Form particle movement at surface of elastomer specified point or specific region with particular track; And then through the friction between stator, the rotor coupling microscopic motion of particle is converted to the macroscopic motion of rotor; Have low speed high torque, need not gear, no electromagnetic interference, advantage such as response speed is fast and cut off self-lock, have very as a kind of piezoelectric actuator and to use widely.
From the simplicity of exiting principle and the simplicity of theoretical analysis method, piezoelectric ultrasonic motor adopts the mode of metallic elastic body stickup piezoelectric ceramic thin sheet to encourage mostly at present, owing to receive the d of piezoelectric ceramic
31Pattern mechanical-electric coupling efficient and ceramic material tensile strength are low, and the restriction of the intensity of glue-line and fatigue life etc., and such energisation mode makes the mechanical fan-out capability of ultrasound electric machine receive serious restriction.
Summary of the invention
The problem that the mechanical fan-out capability that exists for the stator that solves the ultrasound electric machine that the existing mode that adopts the metallic elastic body to paste piezoelectric ceramic thin sheet encourages is restricted, and a kind of square rotary ultrasonic motor oscillator that proposes.
Square rotary ultrasonic motor oscillator, it is made up of four front end housings, eight pairs of piezoelectric ceramic pieces, four flanges, four pretension double-screw bolts, eight insulating cases and eight pairs of electrode slices; The structure of four front end housings is all identical with shape; Said front end housing is made up of two shapes and specification all identical horn and a driving foot; Said horn is that the cross section is rectangle and tapered four prisms cylinder; There is a tapped blind hole end face center of the large end face end of horn, and the thread rotary orientation of the screwed hole on two adjacent horn is opposite, and said driving foot is a cylinder; The small end face end of two horn is connected with the outer circumference surface that drives foot simultaneously; The central axis of said two horn is vertical each other, two horn quadrature arrangement, and said two horn are integral piece with driving foot; The centre of said pretension double-screw bolt is the square-section shaft part, and pretension double-screw bolt two ends are the opposite screw thread of rotation direction; Said flange center place is provided with square opening; The square opening that the square-section shaft part of pretension double-screw bolt passes the flange center place reaches interference fit; And the blind threaded engagement of the large end face end of the screw thread through two ends and adjacent two horn, on the pretension double-screw bolt between flange and each horn, all be with a pair of piezoelectric ceramic piece; Between horn and the piezoelectric ceramic piece, be fixed with electrode slice respectively between two piezoelectric ceramic pieces; Between said piezoelectric ceramic piece, electrode slice and pretension double-screw bolt, be fixed with insulating case.
But that square rotary ultrasonic motor oscillator of the present invention has is simple in structure, flexible design, mechanical-electric coupling efficient are high, can realize big moment output, stable performance, be easy to control the advantage of producing in serial form.
Operation principle of the present invention: the piezo ceramic element in the square rotary ultrasonic motor oscillator adopts sandwich structure, adopts the d of the high mechanical-electric coupling efficient of piezoelectric ceramic
33Pattern work has solved the problem of pasting low, the mechanical fan-out capability difference of piezoelectric ceramic chip piezoelectric ultrasonic motor mechanical-electric coupling efficient.The present invention adopts the excitation that realizes two mode of oscillations of transducer along the piezoelectric ceramic piece of thickness direction polarization, through the adjustment structural parameters, realizes the unanimity of two mode of oscillation characteristic frequencies of oscillator; Horn adopts the variable cross-section design to play the effect of amassing wealth by heavy taxation of vibrational energy, can improve the amplitude and the vibration velocity that drive the surperficial particle of foot, makes motor performance be improved.Piezoelectric ceramic piece in the square rotary ultrasonic motor oscillator of the present invention adopts amplitude to equate, frequency is transducer self resonance frequency, phase difference encourages for+90 ° ac voltage signal; Drive signal applies as shown in Figure 5; Utilize the extensional vibration of piezoelectric ceramic piece in oscillator, to motivate two mode of oscillations of two mode of oscillations such as Fig. 6 and shown in Figure 7; Two mode of oscillations are superimposed upon four and drive the surperficial particle generation of foot elliptical trajectory; When four driving foots contact with the cylinder type rotor inner surface, through driving the macroscopic motion output of the friction coupling realization rotor between foot and the rotor.If the phase difference of adjustment excitation signals is-90 °, can realize reverse drive.Four drive foot and participate in simultaneously driving, and can significantly improve the mechanical fan-out capability of motor, and this oscillator made full use of vibration and produced energy, can improve delivery efficiency.
Description of drawings
Fig. 1 is the cutaway view of square rotary ultrasonic motor oscillator of the present invention; Fig. 2 is the structural representation of square rotary ultrasonic motor oscillator shown in Figure 1; Fig. 3 is the polarised direction sketch map of piezoelectric ceramic piece 2, and Fig. 4 is the structural representation of front end housing 1, and Fig. 5 is that the drive signal of oscillator applies sketch map; Fig. 6 is a fundamental vibration Mode Shape sketch map of oscillator, and Fig. 7 is another fundamental vibration Mode Shape sketch map of oscillator.
Embodiment
Embodiment one: combine Fig. 1 to Fig. 4 that this execution mode is described, this execution mode is made up of four front end housings 1, the eight pairs of piezoelectric ceramic pieces 2, four flanges 3, four pretension double-screw bolts 4, eight insulating cases 5 and eight pairs of electrode slices 6; The structure of four front end housings 1 is all identical with shape; Said front end housing 1 is made up of two shapes and specification all identical horn 1-1 and the sufficient 1-2 of driving; Said horn 1-1 is that the cross section is rectangle and tapered four prisms cylinder; There is a tapped blind hole end face center of the large end face end of horn 1-1, and the thread rotary orientation of the screwed hole on two adjacent horn 1-1 is opposite, and the sufficient 1-2 of said driving is a cylinder; The small end face end of two horn 1-1 is connected with the outer circumference surface that drives sufficient 1-2 simultaneously; The central axis of said two horn is vertical each other, two horn 1-1 quadrature arrangement, and said two horn 1-1 are integral piece with driving sufficient 1-2; The centre of said pretension double-screw bolt 4 is the square-section shaft part, and pretension double-screw bolt 4 two ends are the opposite screw thread of rotation direction; Said flange 3 centers are provided with square opening; The square opening that the square-section shaft part of pretension double-screw bolt 4 passes flange 3 centers reaches interference fit; And the blind threaded engagement of the large end face end of the screw thread through two ends and adjacent two horn 1-1, on the pretension double-screw bolt 4 between flange 3 and each the horn 1-1, all be with a pair of piezoelectric ceramic piece 2; Between horn 1-1 and the piezoelectric ceramic piece 2, be fixed with electrode slice 6 respectively between two piezoelectric ceramic pieces 2; Between said piezoelectric ceramic piece 2, electrode slice 6 and pretension double-screw bolt 4, be fixed with insulating case 5.The square rotary ultrasonic motor oscillator of this execution mode is when using, and drive signal connects the common port V of all adjacent electrode slices 6 of as shown in Figure 5 and front end housing 1 and driving power
0Connect, the electrode slice 6 in the middle of the every pair of potsherd 2 respectively with drive signal V
1And V
2Connect.
Embodiment two: this execution mode is that with the difference of embodiment one polarised direction of two whenever adjacent in the said piezoelectric ceramic piece 2 piezoelectric ceramic pieces is opposite.Other compositions are identical with embodiment one with connected mode.
Embodiment three: this execution mode is that with the difference of embodiment one cross section of said piezoelectric ceramic piece 2 is square or circular.Other compositions are identical with embodiment one with connected mode.
Embodiment four: the difference of this execution mode and embodiment one be said four center lines that drive sufficient 1-2 respectively the central axis through four pretension double-screw bolts 4 intersect four angle points of the square planar that constituted each other, and perpendicular to said square planar.Other compositions are identical with embodiment one with connected mode.
Claims (4)
1. square rotary ultrasonic motor oscillator is made up of four front end housings (1), eight pairs of piezoelectric ceramic pieces (2), four flanges (3), four pretension double-screw bolts (4), eight insulating cases (5) and eight pairs of electrode slices (6); The structure of four front end housings (1) is all identical with shape; It is characterized in that said front end housing (1) drives foot (1-2) by two shapes horn (1-1) all identical with specification and one and forms; Said horn (1-1) is rectangle and tapered four prisms cylinder for the cross section; There is a tapped blind hole end face center of the large end face end of horn (1-1); The thread rotary orientation that is positioned at the screwed hole on adjacent two horn (1-1) on the same central axis is opposite; Said driving foot (1-2) is a cylinder; The end face of the small end face end of orthogonal adjacent two horn of central axis (1-1) is connected with the outer circumference surface that drives foot (1-2) respectively, orthogonal adjacent two horn of central axis (1-1) quadrature arrangement, and orthogonal adjacent two horn of central axis (1-1) and driving foot (1-2) they are integral piece; The centre of said pretension double-screw bolt (4) is the square-section shaft part, and pretension double-screw bolt (4) two ends are the opposite screw thread of rotation direction; Said flange (3) center is the square opening that specification and pretension double-screw bolt (4) third side's tee section shaft part are complementary; The square opening of pretension double-screw bolt (4) through flange (3) center runs through flange (3) and screw thread and the blind threaded engagement that is positioned at the large end face end of adjacent two horn (1-1) on the same central axis through two ends, on the double-screw bolt (4) between flange (3) and each horn (1-1), is with a pair of piezoelectric ceramic piece (2); Between horn (1-1) and the piezoelectric ceramic piece (2), be fixed with electrode slice (6) respectively between two piezoelectric ceramic pieces (2) of every pair of piezoelectric ceramic piece (2); Between said piezoelectric ceramic piece (2), electrode slice (6) and pretension double-screw bolt (4), be fixed with insulating case (5).
2. square rotary ultrasonic motor oscillator according to claim 1 is characterized in that the polarised direction of two piezoelectric ceramic pieces in every pair of piezoelectric ceramic pieces in said flange (3) both sides (2) is opposite.
3. square rotary ultrasonic motor oscillator according to claim 1, the cross section that it is characterized in that said piezoelectric ceramic piece (2) is square or circular.
4. square rotary ultrasonic motor oscillator according to claim 1, it is characterized in that said four body center lines that drive foot (1-2) respectively the central axis through four pretension double-screw bolts (4) intersect four the square angle points that constituted each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103060516A CN101630925B (en) | 2009-08-25 | 2009-08-25 | Square rotary ultrasonic motor oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103060516A CN101630925B (en) | 2009-08-25 | 2009-08-25 | Square rotary ultrasonic motor oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101630925A CN101630925A (en) | 2010-01-20 |
| CN101630925B true CN101630925B (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103060516A Expired - Fee Related CN101630925B (en) | 2009-08-25 | 2009-08-25 | Square rotary ultrasonic motor oscillator |
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| CN (1) | CN101630925B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437786A (en) * | 2011-10-18 | 2012-05-02 | 哈尔滨工业大学 | Surface mount type square four-footed rotational ultrasonic motor vibrator |
| CN102904480A (en) * | 2012-11-05 | 2013-01-30 | 哈尔滨工业大学 | Sandwich type square frame ultrasonic motor vibrator |
| CN103489440A (en) * | 2013-09-29 | 2014-01-01 | 哈尔滨工程大学 | Broadband oscillator cross drive underwater acoustic transducer |
| CN106100439B (en) * | 2016-07-11 | 2019-04-19 | 南京航空航天大学 | A kind of stepping type rotating electric machine based on piezoelectric stack driving method |
| CN112217415A (en) * | 2019-07-09 | 2021-01-12 | 重庆邮电大学 | Frame type three-degree-of-freedom piezoelectric resonance self-actuating mechanism and excitation method thereof |
| CN112448612B (en) * | 2020-10-26 | 2021-10-15 | 南京航空航天大学 | Piezoelectric actuation linear moving platform and working method thereof |
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2009
- 2009-08-25 CN CN2009103060516A patent/CN101630925B/en not_active Expired - Fee Related
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| CN101630925A (en) | 2010-01-20 |
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Granted publication date: 20120314 Termination date: 20130825 |