CN103762886B - 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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- CN103762886B CN103762886B CN201410039600.9A CN201410039600A CN103762886B CN 103762886 B CN103762886 B CN 103762886B CN 201410039600 A CN201410039600 A CN 201410039600A CN 103762886 B CN103762886 B CN 103762886B
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Abstract
Sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator, belongs to piezoelectric ultrasonic motor field, and the present invention solves existing T-shaped linear ultrasonic motor oscillator to there is vibrational energy and to leave unused waste, driving method complexity and there is the problem of vibration coupling.The present invention includes vertical beam, 2n sheet piezoelectric ceramic piece, two ultrasonic transformers and 2n plate electrode sheet, wherein, n be more than or equal to 2 even number; About vertical beam, two sides are respectively provided with a stud, and two studs are coaxial, and ultrasonic transformer is the tapered block in cross section; Each stud is all set with n sheet piezoelectric ceramic piece, two ultrasonic transformers are screwed on two studs respectively by the screwed hole of its large end face, and what realize piezoelectric ceramic piece is fastening; Between adjacent two panels piezoelectric ceramic piece, between piezoelectric ceramic piece and ultrasonic transformer, be provided with electrode slice; All piezoelectric ceramic pieces are all along stud axis direction polarization, and adjacent two panels piezoelectric ceramic piece polarised direction is contrary.The present invention is used in piezoelectric ultrasonic motor.
Description
Technical field
The present invention relates to a kind of sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator, belong to piezoelectric ultrasonic motor field.
Background technology
Piezoelectric ultrasonic motor is a kind of inverse piezoelectric effect utilizing piezoelectric ceramic, motivate the vibration in supersonic range in the elastomer, the particle movement with particular track is formed at surface of elastomer specified point or specific region, and then by friction between stator, rotor coupling, the microscopic motion of particle is converted to the macroscopic motion of rotor, have that structure is simple, flexible design, low speed high torque/thrust, power/torque density is high, positioning precision is high, fast response time, cut off self-lock, be not subject to the advantages such as electromagnetic interference without electromagnetic interference.
The patent application that publication date is on January 20th, 2010, publication number is CN101630924, denomination of invention is " T-shaped linear ultrasonic motor oscillator ", he proposes a kind of T-shaped monopodia linear piezoelectric ultrasonic motor oscillator first, the compound of the horizontal sandwich converter of employing and vertical sandwich converter extensional vibration achieves the efficient excitation driving foot place elliptic vibrations, have mechanical-electric coupling efficiency high, high thrust outputs, stable performance can be realized, be easy to control, can the advantage of 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 needs to adopt two-phase alternating current to compress into row energization, vertical transducer is for realizing the excitation driving the vertical direction vibration of foot place, horizontal transducer is for realizing the excitation driving the horizontal direction vibration of foot place, motivational techniques are comparatively complicated, driving power is also comparatively complicated, and the raw bending vibration of obvious coupling that vertical transducer and horizontal transducer all produce, vibration coupling phenomenon is fairly obvious.
Summary of the invention
The present invention seeks to solve existing T-shaped linear ultrasonic motor oscillator that to there is leave unused waste, driving method of vibrational energy complicated and there is the problem of vibration coupling, providing a kind of sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator.
Sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator of the present invention, it comprises vertical beam, 2n sheet piezoelectric ceramic piece, two ultrasonic transformers and 2n plate electrode sheet, wherein, n be more than or equal to 2 even number; About described vertical beam, two sides are respectively provided with a stud, and two studs are coaxial, and described ultrasonic transformer is the tapered block in cross section; Described each stud is all set with n sheet piezoelectric ceramic piece, two ultrasonic transformers are screwed on two studs respectively by the screwed hole of its large end face, and what realize piezoelectric ceramic piece is fastening; Between adjacent two panels piezoelectric ceramic piece, between piezoelectric ceramic piece and ultrasonic transformer, be provided with electrode slice; All piezoelectric ceramic pieces are all along stud axis direction polarization, and adjacent two panels piezoelectric ceramic piece polarised direction is contrary.
Advantage of the present invention: sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator of the present invention operationally only adopts single-phase AC voltage signal to encourage, motivational techniques are very simple, realized the excitation of the extensional vibration of piezoelectric metal composite beam by the stretching vibration of piezoelectric ceramic piece; During real work, the lower end of vertical beam is fixedly connected with outer base, makes the vibration shape of the extensional vibration of composite beam in the oscillator in the present invention (see Fig. 4) create obvious change relative to the free beam extensional vibration vibration shape (see 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 have employed 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 may be used for promoting mover and realizes rectilinear motion and export, and axial component is then used for the precompression (see Fig. 5) overcome between mover and oscillator.
The both sides ultrasonic transformer of ultrasonic motor oscillator of the present invention may be used to activate and exports, and capacity usage ratio is high, there is not the idle waste problem of vibrational energy; In addition, only adopt the extensional vibration of a horizontal beam to achieve the excitation of ultrasonic transformer terminal slope line track vibration, there is not vibration coupling problem, be conducive to putting 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 vibration velocity that drive the surperficial particle of foot, motor performance is improved.
The function that sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator of the present invention drives sufficient linear actuation to export by adopting the method for fixed boundary condition to achieve single longitudinal vibration transducer bilateral, structure is simple, 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 sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator of the present invention, and wherein n is 2;
Fig. 2 is the top plan view of sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator of the present invention;
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 when being sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator of the present invention work;
Fig. 5 is the bending vibation mode picture of free boundary condition lower piezoelectric transducer longitudinal vibration mode;
Fig. 6 drives mover to realize the operation principle schematic diagram of rectilinear motion when being sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator of the present invention work, 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, sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator described in present embodiment, it comprises vertical beam 1,2n sheet piezoelectric ceramic piece 2, two ultrasonic transformers 3 and 2n plate electrode sheet 4, wherein, n be more than or equal to 2 even number; Described vertical beam about 1 two side is respectively provided with a stud 1-1, and two stud 1-1 are coaxial, and described ultrasonic transformer 3 is the tapered block in cross section; Described each stud 1-1 is all set with n sheet piezoelectric ceramic piece 2, two ultrasonic transformers 3 to be screwed respectively on two stud 1-1 by the screwed hole of its large end face, what realize piezoelectric ceramic piece 2 is fastening; Between adjacent two panels piezoelectric ceramic piece 2, between piezoelectric ceramic piece 2 and ultrasonic transformer 3, be provided with electrode slice 4; All piezoelectric ceramic pieces 2 are all along the polarization of stud 1-1 axis direction, and adjacent two panels piezoelectric ceramic piece 2 polarised direction is contrary.
The sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator of present embodiment is when 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 drive singal.
Embodiment two: present embodiment is described below in conjunction with Fig. 2, present embodiment is described further execution mode one, and described vertical beam 1 and two stud 1-1 are integrated part.
In present embodiment, vertical beam 1 and two stud 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 holds cross section equal greatly with ultrasonic transformer 3.
In present embodiment, the cross section of piezoelectric ceramic piece 2 holds cross section equal greatly with 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 holds cross section equal greatly with ultrasonic transformer 3.
Claims (4)
1. sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator, it comprises vertical beam (1), 2n sheet piezoelectric ceramic piece (2), two ultrasonic transformers (3) and 2n plate electrode sheet (4), wherein, n be more than or equal to 2 even number;
Two sides, described vertical beam (1) left and right are respectively provided with a stud (1-1), and two studs (1-1) are coaxial, and described ultrasonic transformer (3) is the tapered block in cross section; Described each stud (1-1) is all set with n sheet piezoelectric ceramic piece (2), two ultrasonic transformers (3) are screwed on two studs (1-1) respectively by the screwed hole of its large end face, and what realize piezoelectric ceramic piece (2) is fastening; Between adjacent two panels piezoelectric ceramic piece (2), between piezoelectric ceramic piece (2) and ultrasonic transformer (3), be provided with electrode slice (4); All piezoelectric ceramic pieces (2) are all along the polarization of stud (1-1) axis direction, and adjacent two panels piezoelectric ceramic piece (2) polarised direction is contrary;
It is characterized in that, this motor oscillator adopts single-phase AC voltage signal to encourage, and the lower end of vertical beam (1) is fixedly connected with outer base; Vertical beam (1) adopts fixing boundary condition, the vibration displacement of ultrasonic transformer (3) small end face comprises axial component and cross stream component, cross stream component realizes rectilinear motion output for promoting mover, and axial component is for overcoming the precompression between mover and oscillator.
2. sandwich type T type two-foot straight line piezoelectric ultrasonic motor oscillator according to claim 1, it is characterized in that, described vertical beam (1) and two studs (1-1) are integrated part.
3. sandwich type T type two-foot straight line piezoelectric ultrasonic motor 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 cross section equal greatly with ultrasonic transformer (3).
4. sandwich type T type two-foot straight line piezoelectric ultrasonic motor 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 cross section equal greatly with ultrasonic transformer (3).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| DE102005039358B4 (en) * | 2005-08-19 | 2016-12-08 | Physik Instrumente (Pi) Gmbh & Co. Kg | Piezoelectric actuator for an ultrasonic motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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