CN103762886A - Sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator - Google Patents
Sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator Download PDFInfo
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- CN103762886A CN103762886A CN201410039600.9A CN201410039600A CN103762886A CN 103762886 A CN103762886 A CN 103762886A CN 201410039600 A CN201410039600 A CN 201410039600A CN 103762886 A CN103762886 A CN 103762886A
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Abstract
The invention discloses a sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator and belongs to the field of piezoelectric ultrasonic motors. The sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator aims at solving the problems that vibration energy is left unused and wasted, a driving method is complicated, and vibration coupling exists in an existing T type straight line ultrasonic motor oscillator. The sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator comprises a vertical girder, 2n piezoelectric ceramic pieces, two amplitude-change poles and 2n electrode plates, wherein n is an even number which is larger than or equal to 2. The left side face and the right side face of the vertical girder are respectively provided with a stud, wherein the two studs are coaxial. The amplitude-change poles are block bodies with the sections gradually thinner, and each stud is sleeved with the n piezoelectric ceramic pieces. The two amplitude-change poles are screwed on the two studs respectively through threaded holes in the large end faces of the amplitude-change poles so as to firmly fix the piezoelectric ceramic pieces. The electrode plates are arranged between every two adjacent piezoelectric ceramic pieces and between the piezoelectric ceramic pieces and the amplitude-change poles. All the piezoelectric ceramic pieces are polarized in the direction of the axes of the studs, and the polarization directions of every two adjacent piezoelectric ceramic pieces are opposite. The sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator is applied to a piezoelectric ultrasonic motor.
Description
Technical field
The present invention relates to the T-shaped double-pin linear piezoelectric ultrasonic motor of a kind of sandwich oscillator, belong to piezoelectric ultrasonic motor field.
Background technology
Piezoelectric ultrasonic motor is a kind of inverse piezoelectric effect of utilizing piezoelectric ceramic, in elastomer, motivate the vibration in supersonic range, at surface of elastomer specified point or specific region, form the particle movement with particular track, and then the coupling of the friction by between stator, rotor converts the microscopic motion of particle to the macroscopic motion of rotor, there is simple in structure, flexible design, low speed high torque/thrust, power/torque density is high, positioning precision is high, fast response time, cut off self-lock, without electromagnetic interference and be not subject to the advantages such as electromagnetic interference.
Within open day, be that January 20, publication number in 2010 are the patent application that CN101630924, denomination of invention are " T-shaped linear ultrasonic motor oscillator ", he has proposed a kind of T-shaped monopodia linear piezoelectric ultrasonic motor oscillator first, adopt horizontal sandwich converter and vertically sandwich converter extensional vibration compound realized the efficient excitation that drives the elliptical orbit vibration of foot place, have advantages of that mechanical-electric coupling efficiency is high, can realize high thrust output, stable performance, be easy to control, can producing in serial form; But not for activating output, there is the idle waste problem of vibrational energy in the vibrational energy at its three rear end cap places; In addition, this motor need to adopt two-phase alternating current to compress into row energization, vertically transducer is for realizing the excitation that drives the vertical direction vibration of foot place, horizontal transducer is for realizing the excitation that drives the horizontal direction vibration of foot place, motivational techniques are comparatively complicated, driving power is also comparatively complicated, the raw bending vibration of obvious coupling vertically all producing on transducer and horizontal transducer, and vibration coupling phenomenon is fairly obvious.
Summary of the invention
The present invention seeks to have the idle waste of vibrational energy, driving method complexity and have the problem of vibration coupling in order to solve existing T-shaped linear ultrasonic motor oscillator, the T-shaped double-pin linear piezoelectric ultrasonic motor of a kind of sandwich oscillator is provided.
The T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich of the present invention oscillator, it comprises vertical beam, 2n sheet piezoelectric ceramic piece, two ultrasonic transformers and 2n plate electrode sheet, wherein, n is more than or equal to 2 even number; Two sides, described vertical beam left and right are respectively provided with a double-screw bolt, and two double-screw bolts are coaxial, and described ultrasonic transformer is the tapered block in cross section; On described each double-screw bolt, be all set with n sheet piezoelectric ceramic piece, two ultrasonic transformers screw respectively on two double-screw bolts by the screwed hole of its large end face, and realization is fastening to piezoelectric ceramic piece; Between adjacent two piezoelectric ceramic pieces, be provided with electrode slice between piezoelectric ceramic piece and ultrasonic transformer; All piezoelectric ceramic pieces are all along double-screw bolt axis direction polarization, and adjacent two piezoelectric ceramic piece polarised directions are contrary.
Advantage of the present invention: the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich of the present invention oscillator only adopts single phase alternating current (A.C.) voltage signal to encourage when work, motivational techniques are very simple, realize the excitation of the extensional vibration of piezoelectricity metal composite beam by the stretching vibration of piezoelectric ceramic piece; During real work, the lower end of vertical beam is fixedly connected with outside pedestal, makes the vibration shape (referring to Fig. 4) of the extensional vibration of composite beam in the oscillator in the present invention produce obvious variation with respect to the free beam extensional vibration vibration shape (referring to Fig. 5).For free beam extensional vibration, the vibration displacement of ultrasonic transformer end is along beam axis direction; And for the extensional vibration of composite beam in the oscillator in the present invention, because vertical beam has adopted fixing boundary condition, the vibration displacement of ultrasonic transformer end not only has axial component, there is cross stream component simultaneously; The cross stream component of ultrasonic transformer end can be realized rectilinear motion output for promoting mover, and axial component is used for overcoming the precompression (referring to Fig. 5) between mover and oscillator.
The both sides ultrasonic transformer of ultrasonic motor oscillator of the present invention may be used to activate output, and capacity usage ratio is high, does not have the idle waste problem of vibrational energy; In addition, only adopt the extensional vibration of a horizontal beam to realize the excitation of ultrasonic transformer end oblique line track vibration, do not have vibration coupling problem, be conducive to put forward high-octane conversion efficiency, also make structure obtain simplification to a great extent, process and assemble is also very simple; Ultrasonic transformer adopts variable cross-section design can 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, and motor performance is improved.
The T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich of the present invention oscillator drives the function of sufficient linear actuation output by adopting the method for fixed boundary condition to realize single longitudinal vibration transducer bilateral, simple in structure, process and assemble is very easy, motivational techniques are simple, capacity usage ratio is high, and is easy to realize producing in serial form.
Accompanying drawing explanation
Fig. 1 is the structural representation of the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich of the present invention oscillator, and wherein n is 2;
Fig. 2 is the top plan view of the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich of the present invention oscillator;
Fig. 3 is the polarised direction schematic diagram of piezoelectric ceramic piece;
The bending vibation mode picture of the mode of oscillation that Fig. 4 utilizes while being the work of the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich of the present invention oscillator;
Fig. 5 is the bending vibation mode picture of free boundary condition lower piezoelectric transducer extensional vibration mode;
Fig. 6 drives mover to realize straight-line operation principle schematic diagram while being the work of the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich of the present invention oscillator, A represents mover, and a represents horizontal direction, and b represents vertical direction, c represents the mover direction of motion, and d represents precompression.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich oscillator described in present embodiment, it comprises vertical beam 1,2n sheet piezoelectric ceramic piece 2, two ultrasonic transformers 3 and 2n plate electrode sheets 4, and wherein, n is more than or equal to 2 even number; Side, two of 1 left and right of described vertical beam is respectively provided with a double-screw bolt 1-1, and two double-screw bolt 1-1 are coaxial, and described ultrasonic transformer 3 is the tapered block in cross section; On described each double-screw bolt 1-1, be all set with 2, two ultrasonic transformers 3 of n sheet piezoelectric ceramic piece and screw respectively on two double-screw bolt 1-1 by the screwed hole of its large end face, realization is fastening to piezoelectric ceramic piece 2; Between adjacent two piezoelectric ceramic pieces 2, be provided with electrode slice 4 between piezoelectric ceramic piece 2 and ultrasonic transformer 3; All piezoelectric ceramic pieces 2 are all along the polarization of double-screw bolt 1-1 axis direction, and adjacent two piezoelectric ceramic piece 2 polarised directions are contrary.
The T-shaped double-pin linear piezoelectric ultrasonic motor of the sandwich oscillator of present embodiment is in application, from vertical beam 1, the even number of electrodes sheet 4 in left side and the even number of electrodes sheet 4 on right side are all connected with the common port of driving power, and from vertical beam 1, the odd number electrode slice in left side and the odd number electrode slice on right side are all connected with driving signal.
Embodiment two: below in conjunction with Fig. 2, present embodiment is described, present embodiment is described further execution mode one, described vertical beam 1 and two double-screw bolt 1-1 are integrated part.
In present embodiment, vertical beam 1 and two double-screw bolt 1-1 are integrated part for simplifying processing and assembly technology.
Embodiment three: present embodiment is described below in conjunction with Fig. 2, present embodiment is described further execution mode one, the cross section of described piezoelectric ceramic piece 2, ultrasonic transformer 3 is square, and the cross section of piezoelectric ceramic piece 2 equates with the large end cross section of ultrasonic transformer 3.
In present embodiment, the cross section of piezoelectric ceramic piece 2 equates with the large end cross section of ultrasonic transformer 3, is conducive to the efficient excitation of extensional vibration.
Embodiment four: present embodiment is described below in conjunction with Fig. 2, present embodiment is described further execution mode one, the cross section of described piezoelectric ceramic piece 2, ultrasonic transformer 3 is circular, and the cross section of piezoelectric ceramic piece 2 equates with the large end cross section of ultrasonic transformer 3.
Claims (4)
1. the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich oscillator, it comprises vertical beam (1), 2n sheet piezoelectric ceramic piece (2), two ultrasonic transformers (3) and 2n plate electrode sheet (4), wherein, n is more than or equal to 2 even number;
It is characterized in that, two sides, described vertical beam (1) left and right are respectively provided with a double-screw bolt (1-1), and two double-screw bolts (1-1) are coaxial, and described ultrasonic transformer (3) is the tapered block in cross section; On described each double-screw bolt (1-1), be all set with n sheet piezoelectric ceramic piece (2), two ultrasonic transformers (3) screw respectively at two double-screw bolts (1-1) upper by the screwed hole of its large end face, and realization is fastening to piezoelectric ceramic piece (2); Between adjacent two piezoelectric ceramic pieces (2), be provided with electrode slice (4) between piezoelectric ceramic piece (2) and ultrasonic transformer (3); All piezoelectric ceramic pieces (2) are all along the polarization of double-screw bolt (1-1) axis direction, and adjacent two piezoelectric ceramic pieces (2) polarised direction is contrary.
2. the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich oscillator according to claim 1, is characterized in that, described vertical beam (1) and two double-screw bolts (1-1) are integrated part.
3. the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich oscillator according to claim 1, it is characterized in that, the cross section of described piezoelectric ceramic piece (2), ultrasonic transformer (3) is square, and the cross section of piezoelectric ceramic piece (2) holds greatly cross section to equate with ultrasonic transformer (3).
4. the T-shaped double-pin linear piezoelectric ultrasonic motor of sandwich oscillator according to claim 1, it is characterized in that, the cross section of described piezoelectric ceramic piece (2), ultrasonic transformer (3) is circular, and the cross section of piezoelectric ceramic piece (2) holds greatly cross section to equate with ultrasonic transformer (3).
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| CN201410039600.9A CN103762886B (en) | 2014-01-27 | 2014-01-27 | Sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator |
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| CN201410039600.9A CN103762886B (en) | 2014-01-27 | 2014-01-27 | Sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104539189A (en) * | 2015-01-09 | 2015-04-22 | 哈尔滨工业大学 | Cross-shaped section beam type paster double-foot ultrasonic motor vibrator |
| CN104964613A (en) * | 2015-07-20 | 2015-10-07 | 哈尔滨工业大学 | Four-axle steering engine driven by piezoelectric vibrators |
| CN105071692A (en) * | 2015-07-20 | 2015-11-18 | 哈尔滨工业大学 | Multi-working mode composite-type cantilever multi-leg piezoelectric actuator |
| CN107552368A (en) * | 2017-10-31 | 2018-01-09 | 哈尔滨工业大学 | A kind of sandwich elliptical ultrasonic vibration system based on symmetrical structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100013353A1 (en) * | 2005-08-19 | 2010-01-21 | Wladimir Wischnewskij | Piezoelectric actuator for an ultrasonic motor |
| CN102361413A (en) * | 2011-10-18 | 2012-02-22 | 哈尔滨工业大学 | Composite flexural vibration sandwich type double-foot linear ultrasonic motor vibrator |
| 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 |
-
2014
- 2014-01-27 CN CN201410039600.9A patent/CN103762886B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100013353A1 (en) * | 2005-08-19 | 2010-01-21 | Wladimir Wischnewskij | Piezoelectric actuator for an ultrasonic motor |
| CN102361413A (en) * | 2011-10-18 | 2012-02-22 | 哈尔滨工业大学 | Composite flexural vibration sandwich type double-foot linear ultrasonic motor vibrator |
| 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104539189A (en) * | 2015-01-09 | 2015-04-22 | 哈尔滨工业大学 | Cross-shaped section beam type paster double-foot ultrasonic motor vibrator |
| CN104539189B (en) * | 2015-01-09 | 2017-01-11 | 哈尔滨工业大学 | Cross-shaped section beam type paster double-foot ultrasonic motor vibrator |
| CN104964613A (en) * | 2015-07-20 | 2015-10-07 | 哈尔滨工业大学 | Four-axle steering engine driven by piezoelectric vibrators |
| CN105071692A (en) * | 2015-07-20 | 2015-11-18 | 哈尔滨工业大学 | Multi-working mode composite-type cantilever multi-leg piezoelectric actuator |
| CN104964613B (en) * | 2015-07-20 | 2016-09-07 | 哈尔滨工业大学 | Use the four axle steering wheels that piezoelectric vibrator drives |
| CN105071692B (en) * | 2015-07-20 | 2017-03-01 | 哈尔滨工业大学 | Multi-operation mode compound cantilever polypody piezoelectric actuator |
| CN107552368A (en) * | 2017-10-31 | 2018-01-09 | 哈尔滨工业大学 | A kind of sandwich elliptical ultrasonic vibration system based on symmetrical structure |
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| CN103762886B (en) | 2016-03-09 |
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