CN101013862B - Conoid stator longitudinal and bending combination ultrasonic linear motor - Google Patents
Conoid stator longitudinal and bending combination ultrasonic linear motor Download PDFInfo
- Publication number
- CN101013862B CN101013862B CN2006101612481A CN200610161248A CN101013862B CN 101013862 B CN101013862 B CN 101013862B CN 2006101612481 A CN2006101612481 A CN 2006101612481A CN 200610161248 A CN200610161248 A CN 200610161248A CN 101013862 B CN101013862 B CN 101013862B
- Authority
- CN
- China
- Prior art keywords
- stator
- conoid
- linear motor
- ultrasonic linear
- piezoelectric ceramic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to one tamper stator longitude compound supersonic line motor, which adopts tamper stator and dial tooth adopt the middle structure with protruding benches for rotor fixing, sliding and guiding; the stator acts on dial tooth through symmetric distributed eight piezoelectricity pads through pressure axis cover to tighten the pads into spiral middle axis; the stator two ends adopt double screw loose to adjust stator pre-pressure and sets screw bolt through pressure board to press rotor for positive pressure.
Description
Technical field
The invention belongs to the ultrasound electric machine in electrical micro-machine field, refer in particular to a kind of Conoid stator longitudinal and bending combination ultrasonic linear motor.
Background technology
Ultrasonic straight line motor has been broken through the notion of conventional motors as a kind of novel micro-actuator, utilizes the inverse piezoelectric effect and the elastomeric ultrasonic vibration of piezoelectric ceramic, microdeformation is converted to the macroscopic motion of rotor or slide block by resonance amplification and mechanical-electric coupling.The small and special electric machine of this brand-new principle and brand new, it is all multidisciplinary to relate to material science, mechanical oscillation, wave theory, tribology, microelectronics and control theory etc., from being born, be the research focus in developed country MEMS fields such as Japan and the United States, moral, method, English together just.
Ultrasonic straight line motor is to utilize the inverse piezoelectric effect of piezoelectric ceramic and the novel electrical micro-machine of ultrasonic vibration.The principle of ultrasonic straight line motor is different from the motor of traditional electromagnetic induction fully, so that power density is big, simple and compact for structure, inertia is little, response is fast, control characteristic is good, low-speed and large-torque (or high thrust), outage can self-locking, position resolution height, can directly drive load, efficient height, noiseless, anti-electromagnetic interference and self do not produce the small and special electric machine that premium properties such as magnetic field becomes a kind of novelty.It is not only a kind of brand-new Automatic Control Component, also is a kind of brand-new type of belt drive.
Existing patent: small linear ultrasonic motor, application number: CN200510037644.9, its position resolution is not high, and response speed is not very fast, and the may command performance is not fine, has sluggishness, creep, undesirable feature such as non-linear.In addition, its extensional vibration frequency is difficult to reach consistent with beam frequency, thereby causes the service wear of motor serious.
Other has paper: vertical curved compound straight line ultrasound electric machine mode of oscillation finite element analysis. Chinese mechanical engineering, 2006,17 (3).Designed ultrasonic straight line motor stator is cylindric in this paper, and the extensional vibration frequency that the size of employing adjusting stator two end nuts is regulated stator is consistent with beam frequency.The adjustment process more complicated, the extensional vibration frequency of stator also is difficult to reach consistent with beam frequency, and structure is compact inadequately, and has sluggishness, creep, undesirable feature such as non-linear, and operating efficiency is not high.
Summary of the invention
The object of the present invention is to provide the more compact structure of the general ultrasonic straight line motor of a kind of ratio, the Conoid stator longitudinal and bending combination ultrasonic linear motor that operation is quieter, thrust/volume ratio is bigger, efficient is higher.
For achieving the above object, by kind of the optimized design of subgroup algorithm and a FEM (finite element) calculation, the stator profile of determining ultrasonic straight line motor of the present invention is a taper.The taper stator than tubular stator more compact structure, volume is littler, weight is lighter, the complex vibration amplitude of its moving tooth is bigger, because the frequency of extensional vibration is almost consistent with the frequency of flexural vibrations, calculating by the virtual prototype model, the shape that obtains the surface acoustic wave behind the moving tooth degeneracy is exactly oval, so operating efficiency is higher.
Ultrasonic straight line motor of the present invention mainly is made up of stator and mover.Be characterized in: adopt the taper stator, the structure that moving tooth adopts both sides to be the middle fluting of boss shape is convenient to the installation of mover, fixing and slippage guiding; Stator acts on moving tooth by eight piezoelectric ceramic pads that are symmetrically distributed by nut and by the last item cover piezoelectric ceramic pad is pressed on the double-screw bolt axis.Piezoelectric ceramic piece has eight, is divided into four groups of a, b, c, d.Wherein the polarised direction up and down of a, b is identical, is the stretching vibration potsherd, and driving voltage is a same-phase; The polarised direction of a, d is opposite, is the flexural vibrations potsherd, driving voltage phase phasic difference 180 degree; And the driving voltage of a and b phasic difference 90 degree mutually.
Adopt pairs of anti-loose nut locking at the stator two ends, by adjusting the precompression of stator two end nuts respectively, the performance that remedies each ceramic gasket can not on all four problem, makes the ceramic gasket service behaviour unanimity that is symmetrical distribution; The cone structure of stator can be guaranteed the longitudinal vibration of motor stator and bend the frequency invariance that shakes; Mover contact with moving tooth above bolt be set compress mover through pressing plate, mover is applied normal pressure.
The operation principle of ultrasonic straight line motor of the present invention is: by selecting suitable stator structure, motor size and material characteristic parameter, the ac-excited voltage signal of same supersonic frequency (more than the 20kHz) is put on vertical and crooked potsherd, intensify the vertical and crooked two kinds of mode of oscillations that stator simultaneously, make motor stator under this resonance frequency by exciting, form elliptic motion and amplify at two ends double wedge and line slide rail contact surface matter node.When apply certain normal pressure to stator, when making the two ends double wedge compress the contact moving body, drive moving body by the friction between stator and the moving body and do rectilinear motion.
The present invention compared with prior art has characteristics such as structure is simple more, compact, volume is littler, easier for installation, and range of application is wider, is more suitable in drive unit small-sized, precision optical machinery.In addition, also have the position resolution height, the may command performance is good, response is fast, the location and adjust that control is simple, between stator and the mover normal pressure easy to adjust, characteristic of simple is installed.Vertical curved compound ultrasonic linear electric motors of the present invention can be used as the principle machine of ultraprecise feed mechanism (feed accuracy can reach 10-8m) and ultrasonic pump.Can avoid the sluggishness, creep of column stator ultrasonic straight line motor, undesirable feature such as non-linear well.The extensional vibration frequency and the beam frequency of vertical curved compound ultrasonic linear electric motors are approaching more, and the surface acoustic wave shape of stator approaches ellipse more, and the work of vertical curved compound straight line ultrasound electric machine is reliable more, and operating efficiency is high more.The present invention mainly obtains the taper stator structure of optimized design by theory analysis and FEM (finite element) calculation, make extensional vibration frequency and beam frequency can reach in theory difference on the frequency at 5Hz with interior (actual debugging difference on the frequency can be controlled in the 20Hz), and the amplitude of moving tooth is bigger, thereby make the thrust of moving tooth bigger, the operating efficiency of ultrasonic straight line motor is higher.
Description of drawings
Fig. 1 is that taper stator piezoelectric micromotor displacement actuator stator is formed schematic diagram.
Fig. 2 is a taper stator piezoelectric micromotor displacement actuator main assembly schematic diagram.
Label title among the above-mentioned figure: 1, insulating case, 2, the double-screw bolt axis, 3, shim liner, 4, piezoelectric ceramic piece, 5, the last item cover, 6, moving tooth, 7, nut, 8, pressing plate, 9, dividing plate, 10, spring shim, 11, bolt, 12, mover.
Embodiment
The present invention is based on the longitudinal vibration that utilizes the piezoelectric ceramic piece piezoelectric effect to swash stator and bending vibration modes and the vertical curved compound ultrasonic linear electric motors that are developed into.It mainly is made up of stator and mover.As seen from the figure, the vertical curved compound ultrasonic linear electric motors of the present invention adopt the stator of cone structure, and stator acts on moving tooth 6 by the double nut 7 of eight piezoelectric ceramic pads 4 that are symmetrically distributed by the stator two ends and by last item cover 5 piezoelectric ceramic pad 4 is pressed on the double-screw bolt axis 2.Employing double nut 7 structures are guaranteed the locking locking in the ultrasonic straight line motor course of work.The structure that moving tooth 4 adopts both sides to be the middle fluting of boss shape is used for the installation of mover with fixing.Duralumin is positioned at the curved peak that shakes of second order of stator in two moving tooth 6 material selections.The physical dimension of stator taper last item cover 5 is determined through finite element analysis computation, can guarantee the longitudinal vibration and the curved frequency invariance that shakes of motor stator, and more cylindric stator has bigger composite amplitude and more approximate oval surface acoustic wave.
Wherein stacked piezoelectric ceramic pad can produce than large amplitude under small voltage, has made full use of the d33 effect of piezoelectric ceramic, compares the d31 effect that ultrasonic straight line motor in the past adopts, and piezoelectric effect has improved more than 3 times.Piezoelectric ceramic piece has eight, is divided into four groups of 4 (a), 4 (b), 4 (c) and 4 (d).Wherein 4 (b) are identical with the polarised direction up and down of 4 (c), are the stretching vibration potsherd, and driving voltage is a same-phase; The polarised direction of 4 (a) and 4 (d) is opposite, is the flexural vibrations potsherd, driving voltage phase phasic difference 180 degree.And the driving voltage of 4 (a) and 4 (b) phasic difference 90 degree mutually.When each group piezoelectric ceramic piece passes to respectively with sinusoidal ac frequently, can effectively inspire the longitudinal vibration and curved the shaking of stator simultaneously, the synthetic meeting of these two vibrations produces elliptic motion in the same way on two moving teeth.Mover contact with moving tooth above act on the pressing plate by bolt mover applied normal pressure, again by this elliptic motion, make 12 of moving tooth 6 and movers produce frictional force, promote mover 12 and do rectilinear motion.When with these two sine voltage signals when anti-phase, the elliptic motion that is produced on the moving tooth is reverse, promotes mover 12 and does counter motion.
Claims (3)
1. Conoid stator longitudinal and bending combination ultrasonic linear motor, it is characterized in that adopting the stator of cone structure, stator acts on moving tooth (6) by the eight piezoelectric ceramic pads (4) that are symmetrically distributed by nut and by last item cover (5) piezoelectric ceramic pad (4) is pressed on the double-screw bolt axis (2); Piezoelectric ceramic piece is divided into four groups of 4a, 4b, 4c and 4d, and wherein the polarised direction up and down of 4b and 4c is identical, is the stretching vibration potsherd, and driving voltage is a same-phase; The polarised direction of 4a and 4d is opposite, is the flexural vibrations potsherd, driving voltage phase phasic difference 180 degree, and the driving voltage of 4a and 4b phasic difference 90 degree mutually.
2. Conoid stator longitudinal and bending combination ultrasonic linear motor according to claim 1 is characterized in that adopting at the stator two ends double nut (7) of locking locking.
3. Conoid stator longitudinal and bending combination ultrasonic linear motor according to claim 1 is characterized in that in the top that mover (12) contacts with moving tooth (6) bolt (11) being set compresses mover (12) through pressing plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101612481A CN101013862B (en) | 2006-12-18 | 2006-12-18 | Conoid stator longitudinal and bending combination ultrasonic linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101612481A CN101013862B (en) | 2006-12-18 | 2006-12-18 | Conoid stator longitudinal and bending combination ultrasonic linear motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101013862A CN101013862A (en) | 2007-08-08 |
| CN101013862B true CN101013862B (en) | 2011-01-05 |
Family
ID=38701195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101612481A Expired - Fee Related CN101013862B (en) | 2006-12-18 | 2006-12-18 | Conoid stator longitudinal and bending combination ultrasonic linear motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101013862B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101262183B (en) * | 2008-04-29 | 2010-07-14 | 哈尔滨工业大学 | Vertical vibration layer energy converter round disk stator and ultrasonic electromotor using this stator |
| CN101262184B (en) * | 2008-04-29 | 2010-07-14 | 哈尔滨工业大学 | Vertical bending layer energy converter round disk stator and ultrasonic electromotor using this stator |
| CN101388621B (en) * | 2008-07-07 | 2010-12-15 | 哈尔滨工业大学 | Sandwich type round plate stator and ultrasonic motor using the same |
| CN102355159B (en) * | 2011-10-10 | 2014-05-14 | 南京航空航天大学 | Resonance-type linear ultrasonic motor and control method |
| CN102355157B (en) * | 2011-10-10 | 2014-02-12 | 哈尔滨工业大学 | Piezoelectric plate-sandwiched rotary linear ultrasonic motor stator |
| CN102706269B (en) * | 2012-05-30 | 2015-07-08 | 江苏大学 | Detection device for micro-variation of diameters of plant cane and detecting method |
| CN112290824B (en) * | 2020-09-14 | 2021-09-17 | 南京航空航天大学 | Threaded piezoelectric linear actuator with high thrust and working method thereof |
| CN113472237B (en) * | 2021-08-12 | 2022-11-15 | 吉林农业科技学院 | Buckling combined actuating inchworm type linear piezoelectric driver and excitation method thereof |
-
2006
- 2006-12-18 CN CN2006101612481A patent/CN101013862B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| JP昭62-64277A 1987.03.23 |
| 梁立英等.圆柱型纵弯复合模态直线超声电机研究.中国农业工程学会2005年学术年会论文集.2005,(2005),403-406. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101013862A (en) | 2007-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101013862B (en) | Conoid stator longitudinal and bending combination ultrasonic linear motor | |
| Kurosawa et al. | Hybrid transducer type ultrasonic motor | |
| US7355325B2 (en) | Wide frequency range electromechanical actuator | |
| CN107040163B (en) | A kind of step-by-step movement miniature piezoelectric motors and its working method | |
| CN101656490A (en) | Longitudinal bending compound modal linear ultrasonic motor | |
| CN103701358B (en) | Balance weight type variable contact force piezoelectric motor | |
| CN103427704A (en) | Double-foot driving piezoelectric linear motor and electric excitation mode | |
| CN1795604A (en) | Near-resonance wide-range operating electromechanical motor | |
| CN102307021A (en) | Different-order bending vibration modal linear ultrasonic motor and operation way thereof | |
| CN103746597A (en) | Paster T-shaped dual-feet linear piezoelectric supersonic motor vibrator | |
| CN100403647C (en) | Small linear ultrasonic motor | |
| CN101001054B (en) | Double-cylinder vibrator linear ultrasonic motor | |
| CN109787505A (en) | A kind of linear piezoelectric motor and its driving method | |
| CN101051798A (en) | Prism longitudinal bend composite vibrator linear supersonic motor | |
| CN108390587B (en) | Single-mode driven double-drive foot-shaped linear ultrasonic motor and control method | |
| CN102437782A (en) | Sandwich I-shaped four-footed linear ultrasonic motor vibrator | |
| US9705425B2 (en) | Piezoelectric linear motor | |
| Spanner et al. | Design of linear ultrasonic micro piezo motor for precision mechatronic systems | |
| CN102025286B (en) | Alternating force based linear ultrasonic motor | |
| CN108429487B (en) | Horizontal plate type in-plane longitudinal-bending composite linear ultrasonic motor with small frequency difference and high efficiency | |
| CN202231635U (en) | Double-vibrator parallel travelling wave type ultrasonic motor | |
| CN101162875B (en) | Slender diameter piston type piezoelectric straight line motor | |
| JP2023538907A (en) | Drive assemblies, motors, and terminals | |
| CN201854204U (en) | Linear ultrasonic motor based on alternating force | |
| CN100525057C (en) | Rod traveling wave type ultrasonic motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20111218 |