CN101651430B - Cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator - Google Patents
Cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator Download PDFInfo
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- CN101651430B CN101651430B CN2009100728179A CN200910072817A CN101651430B CN 101651430 B CN101651430 B CN 101651430B CN 2009100728179 A CN2009100728179 A CN 2009100728179A CN 200910072817 A CN200910072817 A CN 200910072817A CN 101651430 B CN101651430 B CN 101651430B
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Abstract
The invention relates to a cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator belonging to the technical field of piezoelectric ultrasonic motors and solving the problem that the mechanical output capability of a motor is restricted because the prior ultrasonic motor vibrator adopts a metal elastic body to bond piezoelectric ceramic thin plates to excite. The cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator comprises a cylinder and a cantilever bending vibration sandwich transducer which are connected into a whole by cantilevers, a fastening screw is fixedly screwed with a rear end cover after passing through central through holes of a front end cover and the cantilevers, two bending vibration piezoelectric ceramic plates are respectively sleeved among the cantilevers and the front end cover and the rear end cover, electrode plates are arranged among the bending vibration piezoelectric ceramic plates and between each cantilever and each bending vibration piezoelectric ceramic plate, the adjacent bending vibration piezoelectric ceramic plates have opposite polarization directions, the left half plate and the right half plate of each bending vibration piezoelectric ceramic plate are symmetrically cut and combined again and have opposite polarization directions, and two bending vibration piezoelectric ceramic plates which are adjacent to the cantilevers have the same polarization direction. The cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator belongs to the field of manufacturing ultrasonic motors.
Description
Technical field
The present invention relates to a kind of cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor oscillator, belong to the piezoelectric ultrasonic motor technical field.
Background technology
Ultrasound electric machine is a kind of ultrasonic vibrational energy of utilizing, and produces the motor of actuating force by the friction coupling.It utilizes the inverse piezoelectric effect of piezoelectric ceramic, in elastomer, motivate the vibration in the supersonic range, form particle movement at surface of elastomer specified point or specific region then, by the coupling of the friction between stator, the rotor microscopic motion of particle is converted to the macroscopic motion of rotor again with particular track.Ultrasound electric machine because have low speed high torque, need not gear, no electromagnetic interference, advantage such as response speed is fast and cut off self-lock, as a kind of piezoelectric actuator application is very widely arranged.
For the simplicity of exiting principle and the simplicity of theoretical analysis method, the piezoelectric ultrasonic motor oscillator adopts the mode of metallic elastic body stickup piezoelectric ceramic thin sheet to encourage mostly at present, and this energisation mode adopts the d of piezoelectric ceramic
31Vibration mode, d
31Vibration mode is the pattern of potsherd stretching vibration along its length, because this vibration mode Tensile strength is low and realize that the mechanical-electric coupling efficient of power conversion is low, pasted the intensity of glue-line and the restriction of fatigue life simultaneously, make the mechanical fan-out capability of ultrasound electric machine be subjected to serious restriction.
Summary of the invention
The objective of the invention is to adopt the mode of metallic elastic body stickup piezoelectric ceramic thin sheet to encourage the problem that the electromechanics fan-out capability is restricted, a kind of cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor oscillator is provided in order to solve present ultrasonic motor oscillator.
The present invention includes cylinder, it also comprises the cantilever bending vibration sandwich converter, and the cantilever bending vibration sandwich converter is made up of cantilever, trip bolt, the four curved piezoelectric ceramic pieces that shake, four plate electrode sheets, two insulating cases, front end housing and rear end caps,
Central through hole and rear end cap that trip bolt passes front end housing and cantilever screw fixing, be with two curved piezoelectric ceramic pieces that shake between cantilever and the front end housing and on the trip bolt between cantilever and the rear end cap respectively, every adjacent two are curvedly shaken between the piezoelectric ceramic piece and cantilever and curved shake adjacent with cantilever are fixed with a slice electrode slice respectively between the piezoelectric ceramic piece, are provided with insulating case curved shaking between piezoelectric ceramic piece and electrode slice and the trip bolt;
The outer surface of cantilever and cylinder is made one, between the outer surface of cantilever and cylinder groove is arranged, and cylinder inner wall is along a plurality of pectination driving gears of circumferential even distribution, and a plurality of pectination driving gears are axially parallel with the central axis of cylinder along cylinder;
The every curved piezoelectric ceramic piece that shakes polarizes along thickness direction, the symmetrical cutting of the every curved piezoelectric ceramic piece that shakes and the polarised direction of a left side half sheet that reconfigures and right half sheet are opposite, the polarised direction of a left side half sheet of every adjacent two curved piezoelectric ceramic pieces that shake is opposite, the polarised direction of the right side half sheet of every adjacent two curved piezoelectric ceramic pieces that shake is opposite, and the polarised direction of two slice curved the shake piezoelectric ceramic pieces adjacent with cantilever is identical.
Advantage of the present invention is:
Piezo ceramic element among the present invention adopts sandwich structure, adopts the d of the high mechanical-electric coupling efficient of piezoelectric ceramic
33Vibration mode work, d
33Vibration mode is the pattern of potsherd along the thickness direction stretching vibration, 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 can realize the flexural vibrations of transducer along the curved piezoelectric ceramic piece that shakes of thickness direction polarization, and realizes curved natural frequency and the curved degeneracy that shakes between the natural frequency of cylinder of shaking of transducer by adjusting structural parameters.
But that the present invention has is simple in structure, flexible design, 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 a perspective view of the present invention; Fig. 2 is the vertical view cutaway drawing of Fig. 1; Fig. 3 is the polarised direction schematic diagram of the curved piezoelectric ceramic piece that shakes in the cantilever bending vibration sandwich converter shown in Figure 2; Fig. 4 is the vibration shape circumferentially deploying figure of oscillator of the present invention, vibration shape schematic diagram for cylinder six rank bending vibration modes, this mode of oscillation adopts the flexural vibrations excitation cylinder flexural vibration mode of transducer, and two junctions of transducer and cylinder lay respectively at adjacent crest of bending vibration modes and wave trough position.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1～Fig. 4, present embodiment comprises cylinder 1, it also comprises cantilever bending vibration sandwich converter 2, cantilever bending vibration sandwich converter 2 is made up of cantilever 2-1, trip bolt 2-2, four curved shake piezoelectric ceramic piece 2-3, four plate electrode sheet 2-4, two insulating case 2-5, front end housing 2-6 and rear end cap 2-7
Front end housing 2-6 and rear end cap 2-7 are cuboid, central through hole and rear end cap 2-7 that trip bolt 2-2 passes front end housing 2-6 and cantilever 2-1 screw fixing, be with two curved piezoelectric ceramic piece 2-3 that shake on the trip bolt 2-2 between cantilever 2-1 and front end housing 2-6 and the rear end cap 2-7 respectively, every adjacent two are curvedly shaken between the piezoelectric ceramic piece 2-3 and cantilever 2-1 and adjacent curved shaking are fixed with a slice electrode slice 2-4 respectively between the piezoelectric ceramic piece 2-3, be provided with insulating case 2-5 curved shaking between piezoelectric ceramic piece 2-3 and electrode slice 2-4 and the trip bolt 2-2, described insulating case 2-5 respectively is provided with one curved the shaking of cantilever 2-1 both sides between piezoelectric ceramic piece 2-3 and electrode slice 2-4 and the trip bolt 2-2;
The outer surface of cantilever 2-1 and cylinder 1 is made one, between the outer surface of cantilever 2-1 and cylinder 1 groove is arranged, cylinder 1 inwall is along a plurality of pectination driving gear of circumferential even distribution 1-1, pectination driving gear 1-1 and cylinder 1 are integral piece, and a plurality of pectination driving gear 1-1 are axially parallel with central axis along cylinder 1;
The every curved piezoelectric ceramic piece 2-3 that shakes polarizes along thickness direction, the polarised direction of every adjacent two curved piezoelectric ceramic piece 2-3 that shake is opposite, the symmetrical cutting of the every curved piezoelectric ceramic piece 2-3 that shakes and the polarised direction of a left side half sheet that reconfigures and right half sheet are opposite, and the polarised direction of two slice curved the shake piezoelectric ceramic piece 2-3s adjacent with cantilever 2-1 is identical.
The height of cylinder 1 is identical with the thickness of cantilever bending vibration sandwich converter 2 in the present embodiment, can make in the process of reality processing technology simpler.
Operation principle: when the curved piezoelectric ceramic piece 2-3 that shakes among the present invention adopts frequency to be the ac voltage signal excitation of oscillator self resonance frequency, utilize the extensional vibration of the curved piezoelectric ceramic piece 2-3 that shakes in cantilever bending vibration sandwich converter 2, to motivate flexural vibrations, and then the cantilever 2-1 that passes through connection cantilever bending vibration sandwich converter 2 and cylinder 1 realizes the excitation of cylinder bending vibration modes, on cylinder 1, form standing wave, the oscillator vibration shape as shown in Figure 4, pectination driving gear 1-1 surface particle produces the diagonal movement track, and then realizes the macroscopic motion output of rotor by the coupling of the friction between pectination driving gear 1-1 and the rotor.
Embodiment two: the difference of present embodiment and execution mode one is that the cross section of the described curved piezoelectric ceramic piece 2-3 that shakes is a rectangle.Other composition and annexation are identical with execution mode one.
Claims (2)
1. cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor oscillator, it comprises cylinder (1), it is characterized in that: it also comprises cantilever bending vibration sandwich converter (2), cantilever bending vibration sandwich converter (2) is made up of cantilever (2-1), trip bolt (2-2), four curved shake piezoelectric ceramic piece (2-3), four plate electrode sheets (2-4), two insulating cases (2-5), front end housing (2-6) and rear end caps (2-7)
Central through hole and rear end cap (2-7) that trip bolt (2-2) passes front end housing (2-6) and cantilever (2-1) screw fixing, be with two curved piezoelectric ceramic pieces (2-3) that shake between cantilever (2-1) and the front end housing (2-6) and on the trip bolt (2-2) between cantilever (2-1) and the rear end cap (2-7) respectively, every adjacent two curved shake between the piezoelectric ceramic piece (2-3) and cantilever (2-1) and curved the shake piezoelectric ceramic piece (2-3) adjacent with cantilever between be fixed with a slice electrode slice (2-4) respectively, be provided with insulating case (2-5) between piezoelectric ceramic piece (2-3) and electrode slice (2-4) and the trip bolt (2-2) bending to shake;
Cantilever (2-1) is made one with the outer surface of cylinder (1), between the outer surface of cantilever (2-1) and cylinder (1) groove is arranged, cylinder (1) inwall is along a plurality of pectination driving gears of circumferential even distribution (1-1), and a plurality of pectination driving gears (1-1) are axially parallel with the central axis of cylinder along cylinder (1);
The every curved piezoelectric ceramic piece (2-3) that shakes polarizes along thickness direction, the symmetrical cutting of the every curved piezoelectric ceramic piece (2-3) that shakes and the polarised direction of a left side half sheet that reconfigures and right half sheet are opposite, the polarised direction of a left side half sheet of every adjacent two curved piezoelectric ceramic pieces (2-3) that shake is opposite, the polarised direction of the right side half sheet of every adjacent two curved piezoelectric ceramic pieces (2-3) that shake is opposite, and the polarised direction of two slice curved the shake piezoelectric ceramic pieces (2-3) adjacent with cantilever (2-1) is identical.
2. cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor oscillator according to claim 1 is characterized in that: the cross section of the described curved piezoelectric ceramic piece (2-3) that shakes is a rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100728179A CN101651430B (en) | 2009-09-08 | 2009-09-08 | Cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100728179A CN101651430B (en) | 2009-09-08 | 2009-09-08 | Cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator |
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| Publication Number | Publication Date |
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| CN101651430A CN101651430A (en) | 2010-02-17 |
| CN101651430B true CN101651430B (en) | 2011-06-08 |
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| CN2009100728179A Expired - Fee Related CN101651430B (en) | 2009-09-08 | 2009-09-08 | Cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101262188A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Vertical vibration sandwich energy converter cylinder stator and ultrasonic electromotor using this stator |
| CN101262186A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Vertical bending layer energy converter cylinder stator and ultrasonic electromotor using this stator |
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2009
- 2009-09-08 CN CN2009100728179A patent/CN101651430B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101262188A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Vertical vibration sandwich energy converter cylinder stator and ultrasonic electromotor using this stator |
| CN101262186A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Vertical bending layer energy converter cylinder stator and ultrasonic electromotor using this stator |
Non-Patent Citations (1)
| Title |
|---|
| JP特开昭64-85583A 1989.03.30 |
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| CN101651430A (en) | 2010-02-17 |
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Granted publication date: 20110608 Termination date: 20110908 |