CN102361414A - Buckling composite modal sandwich type double-foot rotating ultrasonic motor vibrator with elastic supports - Google Patents
Buckling composite modal sandwich type double-foot rotating ultrasonic motor vibrator with elastic supports Download PDFInfo
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- CN102361414A CN102361414A CN2011103187251A CN201110318725A CN102361414A CN 102361414 A CN102361414 A CN 102361414A CN 2011103187251 A CN2011103187251 A CN 2011103187251A CN 201110318725 A CN201110318725 A CN 201110318725A CN 102361414 A CN102361414 A CN 102361414A
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Abstract
The invention discloses a buckling composite modal sandwich type double-foot rotating ultrasonic motor vibrator with elastic supports, and relates to the technical field of piezoelectric ultrasonic motors. The vibrator solves the problem that the vibration energy is utilized insufficiently and the mechanical output capacity is restricted in the conventional ultrasonic motor vibrator. The ultrasonic motor vibrator comprises two amplitude transformation rods, two pairs of flexural vibration piezoelectric ceramic chips, two pairs of longitudinal vibration piezoelectric ceramic chips, a neutral plate, two mounting seats, two thin-wall beams, two insulating bushes, eight electrode plates and two friction plates; the amplitude transformation rods are blocks, the sections of which are rectangular and gradually thinned; the small end faces of the amplitude transformation rods are provided with driving feet; the friction plates are fixed in through slots of the small end faces of the amplitude transformation rods; two ends of the neutral plate are provided with studs; and the amplitude transformation rods are respectively screwed to the ends of the studs through thread holes of the big end faces, so that the flexural vibration piezoelectric ceramic chips and the longitudinal vibration piezoelectric ceramic chips are compacted between the amplitude transformation rods and the neutral plate. The vibrator is suitable for the conventional rotating ultrasonic motor.
Description
Technical field
The present invention relates to a kind of buckling composite mode sandwich biped rotary ultrasonic motor oscillator, belong to the piezoelectric ultrasonic motor technical field with resiliency supported.
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 mover 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 next-generation drive 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 vibrational energy that exists for the oscillator that solves the ultrasound electric machine that the existing mode that adopts the metallic elastic body to paste piezoelectric ceramic thin sheet encourages utilizes insufficient, mechanical fan-out capability to be restricted the invention provides a kind of buckling composite mode sandwich biped rotary ultrasonic motor oscillator with resiliency supported.
The buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported of the present invention is the left-right symmetric structure, it is characterized in that said ultrasonic motor oscillator comprises two horn, two pairs of curved shake piezoelectric ceramic piece, two pairs of longitudinal vibration piezoelectric ceramic pieces, neutral plate, two mount pads, two thin walled beams, two insulating cases, eight electrode slices and two friction plates; Said horn is the tapered block in cross section, and the small end face of horn is for driving foot, and each drives on the foot and is fixed with a friction plate; There is a tapped blind hole at the center of the large end face of horn; The two ends at said neutral plate center all are fixed with double-screw bolt; Be with a pair of curved shake piezoelectric ceramic piece and a pair of longitudinal vibration piezoelectric ceramic piece on each double-screw bolt; And double-screw bolt and above that curved shaking of cover are provided with insulating case between piezoelectric ceramic piece and the longitudinal vibration piezoelectric ceramic piece, thereby the end that two horn screwed hole through its large end face is combined on two double-screw bolts respectively is pressed abd fixed on curved piezoelectric ceramic piece and the longitudinal vibration piezoelectric ceramic piece of shaking between horn and the neutral plate; Said longitudinal vibration piezoelectric ceramic piece is arranged near neutral plate one side; The said curved piezoelectric ceramic piece that shakes is arranged near horn one side, between neutral plate and the longitudinal vibration piezoelectric ceramic piece, between two longitudinal vibration piezoelectric ceramic pieces, two curvedly shake between the piezoelectric ceramic piece, curved shaking be fixed with electrode slice respectively between piezoelectric ceramic piece and the longitudinal vibration piezoelectric ceramic piece; Said two thin walled beams are symmetricly set on neutral plate both sides, and are positioned at the centre of said neutral plate, and said thin walled beam is used for connection seat and neutral plate.
The cross section of curved shake piezoelectric ceramic piece and longitudinal vibration piezoelectric ceramic piece of the present invention is rectangle or circle.
Neutral plate of the present invention, double-screw bolt, thin walled beam and mount pad are integral piece.
All piezoelectric ceramic pieces of the present invention all polarize along thickness direction; The polarised direction of adjacent two longitudinal vibration piezoelectric ceramic pieces is opposite; The every curved piezoelectric ceramic piece that shakes is made up of two block-shaped half identical sheet piezoelectric ceramic pieces, and the polarised direction of said two and half sheet piezoelectric ceramic pieces is opposite; The polarised direction of two and half sheet piezoelectric ceramic pieces of position correspondence is opposite in adjacent two curved piezoelectric ceramic pieces that shake.
The small end face of horn of the present invention has a rectangular through slot, and friction plate is through on the small end face that changes rectangular through slot and be fixed on horn.
Piezo ceramic element in the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported of the present invention 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 two pairs of longitudinal vibration piezoelectric ceramic pieces to realize the excitation of oscillator longitudinal vibration mode, adopts two pairs of curved piezoelectric ceramic pieces that shake to realize the excitation of oscillator bending vibration modes, through the structure parameters adjustment, can realize the degeneracy between oscillator longitudinal vibration and the bending vibration modes characteristic frequency; Horn adopts the variable cross-section design to play the effect of amassing wealth by heavy taxation of vibrational energy, can improve the vibration velocity and the amplitude of the terminal particle of horn under longitudinal vibration and the bending vibration modes, makes motor performance be improved; Thin walled beam can be realized resiliency supported and vibration isolation, drops to minimum to the longitudinal vibration of oscillator and the influence degree of bending vibration modes mount pad and connecting of other member.
Longitudinal vibration in the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported of the present invention adopts amplitude to equate respectively with the curved piezoelectric ceramic piece that shakes, frequency is oscillator self resonance frequency, phase difference encourages for+90 ° ac voltage signal; Utilize the stretching vibration of longitudinal vibration piezoelectric ceramic piece in oscillator, to encourage longitudinal vibration mode; Utilize the stretching vibration of the curved piezoelectric ceramic piece that shakes in oscillator, to motivate bending vibration modes; Longitudinal vibration is superimposed upon two with bending vibration modes and drives the identical elliptical orbit vibration of the surperficial particle generation of foot rotation direction; And then realize the output that rotatablely moves of mover through the friction coupling that drives foot and cylinder type mover inner surface; Make full use of longitudinal vibration and realized that with the curved energy that shakes two drive foot actuating simultaneously, can increase exponentially the mechanical fan-out capability of motor.If the phase difference of adjustment excitation signals is-90 °, can realize reverse drive.
But the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported of the present invention has, and vertical curved vibrational energy utilance is high, simple in structure, mechanical-electric coupling efficient height, can realize big moment output, stable performance, be easy to control the advantage of producing in serial form.
Description of drawings
Fig. 1 is the cutaway view of the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported of the present invention; Fig. 2 is the perspective view of oscillator shown in Figure 1; Fig. 3 is the polarised direction sketch map of two pairs of curved shake piezoelectric ceramic piece 2 and two pairs of longitudinal vibration piezoelectric ceramic pieces 3 among Fig. 1; Fig. 4 is the longitudinal vibration Mode Shape sketch map of oscillator shown in Figure 1, and Fig. 5 is the bending vibration modes vibration shape sketch map of oscillator shown in Figure 1.
Embodiment
Embodiment one: combine Fig. 1 and Fig. 2 that this execution mode is described; The buckling composite mode sandwich biped rotary ultrasonic motor oscillator of the described band resiliency supported of this execution mode is the left-right symmetric structure, it is characterized in that said ultrasonic motor oscillator comprises the curved piezoelectric ceramic piece 2 of shaking of two horn 1, two pairs, the two pairs of longitudinal vibration piezoelectric ceramic pieces 3, neutral plate 4, two mount pads 5, two thin walled beams 6, two insulating cases 7, eight electrode slices 8 and two friction plates 9; Said horn 1 is the tapered block in cross section, and the small end face of horn 1 is for driving foot, and each drives on the foot and is fixed with a friction plate 9; There is a tapped blind hole at the center of the large end face of horn 1; The two ends at said neutral plate 4 centers all are fixed with double-screw bolt 4-1; Be with a pair of curved piezoelectric ceramic piece 2 and a pair of longitudinal vibration piezoelectric ceramic piece 3 of shaking on each double-screw bolt 4-1; And double-screw bolt 4-1 and above that curved shaking of cover are provided with insulating case 7 between piezoelectric ceramic piece 2 and the longitudinal vibration piezoelectric ceramic piece 3, thereby the end that two horn 1 screwed hole through its large end face is combined on two double-screw bolt 4-1 respectively is pressed abd fixed on curved piezoelectric ceramic piece 2 and the longitudinal vibration piezoelectric ceramic piece 3 of shaking between horn 1 and the neutral plate 4; Said longitudinal vibration piezoelectric ceramic piece 3 is arranged near neutral plate 4 one sides; The said curved piezoelectric ceramic piece 2 that shakes is arranged near horn 1 one sides, between neutral plate 4 and the longitudinal vibration piezoelectric ceramic piece 3, between two longitudinal vibration piezoelectric ceramic pieces 3, two curvedly shake between the piezoelectric ceramic piece 2, curved shaking be fixed with electrode slice 8 respectively between piezoelectric ceramic piece 2 and the longitudinal vibration piezoelectric ceramic piece 3; Said two thin walled beams 6 are symmetricly set on neutral plate 4 both sides, and are positioned at the centre of said neutral plate 4, and said thin walled beam 6 is used for connection seat 5 and neutral plate 4.
The buckling composite mode sandwich biped rotary ultrasonic motor oscillator of the band resiliency supported of this execution mode is when using; Two electrode slices 8 between neutral plate 4 and longitudinal vibration piezoelectric ceramic piece 3, longitudinal vibration piezoelectric ceramic piece 3 and curved two electrode slices 8 that shake between the piezoelectric ceramic piece 2 all are connected with the common port of driving power; Curved shake two electrode slices 8 and driving power between the piezoelectric ceramic piece 2 one mutually drive signal connect two electrode slices 8 between longitudinal vibration piezoelectric ceramic piece 3 and other one drive signal connection mutually of driving power.
Embodiment two: this execution mode is that with the difference of the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of embodiment one described band resiliency supported the said curved cross section that shakes piezoelectric ceramic piece 2 and longitudinal vibration piezoelectric ceramic piece 3 is rectangle or circle.
Embodiment three: the difference of the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of this execution mode and embodiment one described band resiliency supported is, said neutral plate 4, double-screw bolt 4-1, thin walled beam 6 and mount pad 5 are integral piece.
Because rotary ultrasonic motor oscillator of the present invention is the left-right symmetric structure; Promptly with the plane of symmetry left-right symmetric of neutral plate 4; Said thin walled beam 6 is positioned on the plane of symmetry; Said thin walled beam 6 can be realized the effect that resiliency supported and vibration are isolated, and can drop to the influence degree that connects the flexural vibration mode of oscillator of oscillator and other member minimum.
Embodiment four: this execution mode is described referring to Fig. 3.This execution mode is with the difference of the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of embodiment one described band resiliency supported; Described all piezoelectric ceramic pieces all polarize along thickness direction; The polarised direction of adjacent two longitudinal vibration piezoelectric ceramic pieces 3 is opposite; The every curved piezoelectric ceramic piece 2 that shakes is made up of two block-shaped half identical sheet piezoelectric ceramic piece 2-1, and the polarised direction of said two and half sheet piezoelectric ceramic piece 2-1 is opposite; The polarised direction of two and half sheet piezoelectric ceramic piece 2-1 of position correspondence is opposite in adjacent two curved piezoelectric ceramic pieces that shake.
Embodiment five: this execution mode is with the difference of the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of embodiment one described band resiliency supported; The small end face of said horn 1 has a rectangular through slot, and friction plate 9 is through on the small end face that changes rectangular through slot and be fixed on horn 1.
This execution mode is processed with a rectangular through slot at the small end face of horn 1, makes friction plate 9 be fixed in the terminal rectangular through slot of horn 1 through mechanical connection manner, avoids under big moment output situation friction plate from driving the generation of dropping situations on the foot.
Referring to Fig. 4 and shown in Figure 5; It is the vibration shape sketch map of two kinds of mode of oscillations of the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported of the present invention; Wherein, Fig. 4 is a longitudinal vibration Mode Shape sketch map, and Fig. 5 is a bending vibration modes vibration shape sketch map.
Claims (5)
1. be with the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of resiliency supported; Said rotary ultrasonic motor oscillator is the left-right symmetric structure, it is characterized in that said ultrasonic motor oscillator comprises two horn (1), two pairs of curved shake piezoelectric ceramic piece (2), two pairs of longitudinal vibration piezoelectric ceramic pieces (3), neutral plate (4), two mount pads (5), two thin walled beams (6), two insulating cases (7), eight electrode slices (8) and two friction plates (9); Said horn (1) is the tapered block in cross section, and the small end face of horn (1) is for driving foot, and each drives on the foot and is fixed with a friction plate (9); There is a tapped blind hole at the center of the large end face of horn (1); The two ends at said neutral plate (4) center all are fixed with double-screw bolt (4-1); Be with a pair of curved shake piezoelectric ceramic piece (2) and a pair of longitudinal vibration piezoelectric ceramic piece (3) on each double-screw bolt (4-1); And be provided with insulating case (7) between double-screw bolt (4-1) and the cover curved piezoelectric ceramic piece that shakes (2) and the longitudinal vibration piezoelectric ceramic piece (3) above that, the screwed hole of two horn (1) through its large end face be combined on two double-screw bolts (4-1) respectively thus the end be pressed abd fixed between horn (1) and the neutral plate (4) bending shake piezoelectric ceramic piece (2) and longitudinal vibration piezoelectric ceramic piece (3); Said longitudinal vibration piezoelectric ceramic piece (3) is arranged near neutral plate (4) one sides; The said curved piezoelectric ceramic piece (2) that shakes is arranged near horn (1) one side, between neutral plate (4) and the longitudinal vibration piezoelectric ceramic piece (3), between two longitudinal vibration piezoelectric ceramic pieces (3), two curvedly shake between the piezoelectric ceramic piece (2), bend to shake and be fixed with electrode slice (8) respectively between piezoelectric ceramic piece (2) and the longitudinal vibration piezoelectric ceramic piece (3); Said two thin walled beams (6) are symmetricly set on neutral plate (4) both sides, and are positioned at the centre of said neutral plate (4), and said thin walled beam (6) is used for connection seat (5) and neutral plate (4).
2. the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported according to claim 1 is characterized in that the cross section of said curved shake piezoelectric ceramic piece (2) and longitudinal vibration piezoelectric ceramic piece (3) is rectangle or circle.
3. the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported according to claim 1 is characterized in that said neutral plate (4), double-screw bolt (4-1), thin walled beam (6) and mount pad (5) are integral piece.
4. the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported according to claim 1; It is characterized in that described all piezoelectric ceramic pieces all polarize along thickness direction; The polarised direction of adjacent two longitudinal vibration piezoelectric ceramic pieces (3) is opposite; The every curved piezoelectric ceramic piece (2) that shakes is made up of two block-shaped half identical sheet piezoelectric ceramic pieces (2-1), and the polarised direction of said two and half sheet piezoelectric ceramic pieces (2-1) is opposite; The polarised direction of two and half sheet piezoelectric ceramic pieces (2-1) of position correspondence is opposite in adjacent two curved piezoelectric ceramic pieces that shake.
5. the buckling composite mode sandwich biped rotary ultrasonic motor oscillator of band resiliency supported according to claim 1; The small end face that it is characterized in that said horn (1) has a rectangular through slot, and friction plate (9) is fixed on the small end face of horn (1) through this rectangular through slot.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103187251A CN102361414A (en) | 2011-10-19 | 2011-10-19 | Buckling composite modal sandwich type double-foot rotating ultrasonic motor vibrator with elastic supports |
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| CN2011103187251A CN102361414A (en) | 2011-10-19 | 2011-10-19 | Buckling composite modal sandwich type double-foot rotating ultrasonic motor vibrator with elastic supports |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102861693A (en) * | 2012-10-15 | 2013-01-09 | 哈尔滨工业大学 | Piezoelectric micro-spraying device based on longitudinal vibration sandwich transducer |
| CN102868315A (en) * | 2012-10-12 | 2013-01-09 | 哈尔滨工业大学 | Paster-type bending vibration composite dual-feet ultrasound motor oscillator |
| CN102882423A (en) * | 2012-10-18 | 2013-01-16 | 哈尔滨工业大学 | Double-leg rotating ultrasonic motor oscillator of combined torsional oscillation |
| CN103354431A (en) * | 2013-06-28 | 2013-10-16 | 南京航空航天大学 | Longitudinal and bending composite mode sandwich-type ultrasonic motor oscillator |
| CN104038100A (en) * | 2014-06-25 | 2014-09-10 | 哈尔滨工业大学 | Multi-foot rotational piezoelectric actuator and excitation method for implementing cross-scale actuation therefor |
| CN104038101A (en) * | 2014-06-25 | 2014-09-10 | 哈尔滨工业大学 | Longitudinal-bending composite modal based cross-scale driving realizing method of foot-type piezoelectric actuator |
| CN105406759A (en) * | 2016-01-08 | 2016-03-16 | 哈尔滨工业大学 | Partition exciting longitudinal and bending composite ultrasonic motor vibrator |
| CN111036532A (en) * | 2018-10-13 | 2020-04-21 | 苏州宝时得电动工具有限公司 | Ultrasonic tool |
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| CN101022256A (en) * | 2007-03-20 | 2007-08-22 | 哈尔滨工业大学 | Sandwich transducer type longitudinal and bending linear ultrasound motor with frequency-modulating variable-amplitude rod |
| CN101626206A (en) * | 2009-08-19 | 2010-01-13 | 哈尔滨工业大学 | Longitudinal and flexural composite transducer type double cylinder-shaped traveling wave ultrasonic motor vibrator |
| CN101626203A (en) * | 2009-08-19 | 2010-01-13 | 哈尔滨工业大学 | Vibrator of beam type linear ultrasonic motor using bending vibration modes |
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| US20030178915A1 (en) * | 2002-03-22 | 2003-09-25 | Yoon Seok Jin | Linear piezoelectric ultrasonic motor |
| CN101022256A (en) * | 2007-03-20 | 2007-08-22 | 哈尔滨工业大学 | Sandwich transducer type longitudinal and bending linear ultrasound motor with frequency-modulating variable-amplitude rod |
| CN101626206A (en) * | 2009-08-19 | 2010-01-13 | 哈尔滨工业大学 | Longitudinal and flexural composite transducer type double cylinder-shaped traveling wave ultrasonic motor vibrator |
| CN101626203A (en) * | 2009-08-19 | 2010-01-13 | 哈尔滨工业大学 | Vibrator of beam type linear ultrasonic motor using bending vibration modes |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868315A (en) * | 2012-10-12 | 2013-01-09 | 哈尔滨工业大学 | Paster-type bending vibration composite dual-feet ultrasound motor oscillator |
| CN102861693A (en) * | 2012-10-15 | 2013-01-09 | 哈尔滨工业大学 | Piezoelectric micro-spraying device based on longitudinal vibration sandwich transducer |
| CN102882423A (en) * | 2012-10-18 | 2013-01-16 | 哈尔滨工业大学 | Double-leg rotating ultrasonic motor oscillator of combined torsional oscillation |
| CN102882423B (en) * | 2012-10-18 | 2016-01-20 | 哈尔滨工业大学 | Composite bending vibration biped rotary ultrasonic motor oscillator |
| CN103354431A (en) * | 2013-06-28 | 2013-10-16 | 南京航空航天大学 | Longitudinal and bending composite mode sandwich-type ultrasonic motor oscillator |
| CN103354431B (en) * | 2013-06-28 | 2015-11-18 | 南京航空航天大学 | A kind of composite mode sandwich two-foot ultrasonic linear motor ultrasonic motor oscillator |
| CN104038100A (en) * | 2014-06-25 | 2014-09-10 | 哈尔滨工业大学 | Multi-foot rotational piezoelectric actuator and excitation method for implementing cross-scale actuation therefor |
| CN104038101A (en) * | 2014-06-25 | 2014-09-10 | 哈尔滨工业大学 | Longitudinal-bending composite modal based cross-scale driving realizing method of foot-type piezoelectric actuator |
| CN104038101B (en) * | 2014-06-25 | 2016-05-25 | 哈尔滨工业大学 | A kind of buckling composite mode foot formula piezoelectric actuator is realized the method driving across yardstick |
| CN105406759A (en) * | 2016-01-08 | 2016-03-16 | 哈尔滨工业大学 | Partition exciting longitudinal and bending composite ultrasonic motor vibrator |
| CN111036532A (en) * | 2018-10-13 | 2020-04-21 | 苏州宝时得电动工具有限公司 | Ultrasonic tool |
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Application publication date: 20120222 |