CN201022182Y - Contact side positive pressure varying piezoelectricity rotation driver - Google Patents
Contact side positive pressure varying piezoelectricity rotation driver Download PDFInfo
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- CN201022182Y CN201022182Y CNU2007200933305U CN200720093330U CN201022182Y CN 201022182 Y CN201022182 Y CN 201022182Y CN U2007200933305 U CNU2007200933305 U CN U2007200933305U CN 200720093330 U CN200720093330 U CN 200720093330U CN 201022182 Y CN201022182 Y CN 201022182Y
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Abstract
The utility model relates to a piezoelectric rotatable driver with the variable n interface positive-pressure, belonging to a piezoelectric precise rotatable driver. A shaft is connected with a base of the driver. A shaft sleeve is rotatablely connected with the base and rotates around the geometrical center of the shaft. An end of a piezoelectric stack 1 and a piezoelectric stack 2 are separately adhered on the oblique surface of a adjusting three-angle block, while the other end of the piezoelectric stack 1 and the piezoelectric stack 2 are separately connected with an inertia mass block 1 and an inertia mass block 2. A piezoelectric stack vibrator 1 is composed of the piezoelectric stack 1 and the inertia mass block 1, while a piezoelectric stack vibrator 2 is composed of the piezoelectric stack 2 and the inertia mass block 2. The adjusting three-angle block is connected with a driving platform of the shaft sleeve. The utility model adopts a one-way symmetrical-wave signal driving and has the advantages of simple driving circuit, no electro-magnetic interference, simple structure and high operating speed, which could realize the large-stroke driving. The non-linear characteristic of the piezoelectric component is less effective on the driving movement.
Description
Technical field
The utility model relates to the accurate rotating driver of a kind of piezoelectricity, and it is drive source that this driver adopts piezoelectric stack.
Background technology
In recent years, along with science and technology development, research in technical fields such as optics, electronics, Aeronautics and Astronautics, machine-building, robot, seismology, biology, medical science and genetic engineerings all presses for submicron order, nano level micrometric displacement technology, thereby realizes the microoperation of micro/nano level.As the core component of micro OS, the development of precision driver just becomes the important symbol of micro OS development level.Present piezoelectric inertia driving mechanism mainly is an inverse piezoelectric effect of utilizing piezoelectric element, the excitation of employing asymmetric waveform, form two-way asymmetrical inertial impact force, with the friction fit of fixing and the combination of suitable mechanical structure, ordered control by Circuits System forms driving action, and then forms continuous directed movement.Wherein utilize the driving mechanism of the quick distortion generation inertial impact force of piezoelectric element, it is design by Circuits System, output Asymmetric Electric signal, make piezoelectric element can produce quick elongation, slowly withdrawal, or the slow forms of motion of elongation, fast retractile, under the effect of alternating electric signal, driving mechanism produces the one-way movement on the macroscopic view.
Summary of the invention
The utility model proposes a kind of contact surface positive pressure varying piezoelectric rotating driver,, and change frictional force with mechanical system with the problem of the control circuit more complicated that solve to produce the asymmetrical wave signal of telecommunication.The technical solution adopted in the utility model is: axle 3 is fixedlyed connected with actuator base 8, axle sleeve 7 is rotationally connected with base 8, axle sleeve 7 rotates around axle 3 geometric centers, piezoelectric stack 1, piezoelectric stack 251 ends are bonded in respectively to be adjusted on corner block 6 skewed surfaces, the other end respectively with inertial mass 1, inertial mass 24 is bonding, piezoelectric stack 1 constitutes piezoelectric stack oscillator one with inertial mass 1, piezoelectric stack 25 constitutes piezoelectric stack oscillator two with inertial mass 24, adjusting corner block 6 fixedlys connected with the driving platform on the axle sleeve (7), piezoelectric stack oscillator one, the piezoelectric stack oscillator two 180 ° of balanced configurations of being separated by, oppositely install, and identical with the angle α of horizontal plane, this angle α is 30 °～60 °.
A kind of embodiment of the utility model, with be separated by 90 ° position of piezoelectric stack oscillator one and piezoelectric stack oscillator two, symmetrical reverse is installed piezoelectric stack oscillator three and piezoelectric stack oscillator four respectively again, these piezoelectric stack oscillator three structures are that piezoelectric stack 39 is bonding with inertial mass 3 10, and these piezoelectric stack oscillator four structures are that piezoelectric stack 4 11 is bonding with inertial mass 4 12.
A kind of embodiment of the utility model, the control signal of driving element piezoelectric stack are the periodicity symmetrical wave.
The utility model is under the excitation of symmetrical wave, by the normal pressure between control contact-making surface and the driver, utilize piezoelectric inertia driver moment of friction on the mechanism kinematic direction smaller, non-direction of motion moment of friction is big relatively, and piezoelectric actuator is rotated to the little direction of frictional resistance moment.Obviously this is a kind ofly to utilize the variation of normal pressure and produce the piezoelectric inertia rotating driver that the difference of frictional couple is carried out work, being that the control of piezoelectric inverse piezoelectric effect and moment of friction is organically combined the drive unit that forms, be further to set up basic in the application study of the systems such as walking mechanism of microminiature machinery, robot simultaneously.
The utility model proposes and utilize the balancing waveform signal of telecommunication to drive piezoelectric stack elongation and shortening distortion fast, produce two-way identical inertial impact force, and in conjunction with the variation of the frictional force between controlling and driving mechanism and the supporting surface, form the piezoelectric inertia driver, the main distinction of the inertia impact driver of this inertia starter and present research is the combination by the asymmetrical friction power of the inertial impact force of the symmetry of utilizing easy control symmetrical wave signal of telecommunication generation and variation, driver is formed rotatablely move.Therefore the type of action that forms motion has essence different.
The utility model rotating driver is to adopt single channel symmetrical wave signal to drive, and drive circuit is simple, and no electromagnetic interference can realize that big stroke drives, and mechanical structure is simple, and movement velocity is fast, and the non-linear motion effects to driver of piezoelectric element is very little.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the force analysis figure of the utility model rotary drive mechanism;
Fig. 3 is a vertical view of the present utility model;
Fig. 4 is the two-way rotary drive mechanism schematic diagram of the utility model.
Embodiment
Wherein driving element adopts the piezoelectric stack of AE0505D16 type, and control signal is the periodicity symmetrical wave.
During the utility model work, the size of inertial impact force is relevant with the quality of inertial mass and acceleration, piezoelectric stack produces distortion fast, because the installation site of piezoelectric stack and ground (are adjusted by corner block 6) at an angle, piezoelectric stack oscillator one, two is opposite at the projecting direction of horizontal plane, so the horizontal component of inertial impact force forms torque, vertical stress component will change the normal pressure between driving mechanism and the supporting surface.
The utility model is under the excitation of the symmetrical signal of telecommunication, when piezoelectric stack extended fast, it is downward that the inertia-activated power that inertial mass produces is adjusted the piece inclined-plane perpendicular to triangle, as shown in Figure 2, the inertial impact force F that piezoelectric stack 1, piezoelectric stack 25 produce can be decomposed into horizontal actuator force F
1=Fsin α and pressure at right angle F
2=Fcos α two parts, the floor projection direction of inertia-activated impulsive force is opposite, form and drive the moment of couple clockwise, pressure at right angle further increases normal pressure, and therefore, frictional resistance moment strengthens, be less than or equal to the frictional couple square if drive the moment of couple, driver is motionless, if drive the moment of couple greater than the frictional couple square, driver is walked a small step clockwise; When piezoelectric stack shortens fast, the inertia-activated power that inertial mass produces forms the counterclockwise moment of couple perpendicular to the horizontal component that triangle adjustment piece inclined-plane makes progress, and vertical stress component reduces normal pressure, makes driver walk major step counterclockwise, macroscopic view produces and rotates counterclockwise, as shown in Figure 3.
Rotating driver of the present utility model be because piezoelectric stack is bonded in corner block adjusts on the inclined-plane of piece 6, when one timing of inertial mass quality, under symmetrical action of electric signals, the component that inertial impact force produces in vertical direction makes the variation of normal pressure, so frictional force is descending, ascending cyclic variation, inertial impact force component in the horizontal direction produces rotary driving force idol square.Utilize the difference of frictional couple square to combine, will make driver form unidirectional rotatablely moving with the turning pair square is orderly.
As shown in Figure 4.Axle 3 is fixedlyed connected with actuator base 8, axle sleeve 7 is rotationally connected with base 8, axle sleeve 7 rotates around axle 3 geometric centers, piezoelectric stack 1, piezoelectric stack 251 ends are bonded in respectively to be adjusted on corner block 6 skewed surfaces, the other end respectively with inertial mass 1, inertial mass 24 is bonding, piezoelectric stack 1 constitutes piezoelectric stack oscillator one with inertial mass 1, piezoelectric stack 25 constitutes piezoelectric stack oscillator two with inertial mass 24, adjusting corner block 6 fixedlys connected with the driving platform on the axle sleeve 7, piezoelectric stack oscillator one, the piezoelectric stack oscillator two 180 ° of balanced configurations of being separated by, oppositely install, and identical with the angle α of horizontal plane, this angle α is 30 °～60 °; Be separated by 90 ° position of piezoelectric stack oscillator one and piezoelectric stack oscillator two, symmetrical reverse is installed piezoelectric stack oscillator three and piezoelectric stack oscillator four respectively again, these piezoelectric stack oscillator three structures are that piezoelectric stack 39 is bonding with inertial mass 3 10, and these piezoelectric stack oscillator four structures are that piezoelectric stack 4 11 is bonding with inertial mass 4 12.
Rotating driver of the present utility model is at original piezoelectric stack oscillator place, and 90 ° the position symmetrical reverse of being separated by is installed two piezoelectric stack oscillators, adopts two paths of signals to drive, and driver will form two-way rotatablely moving.
Claims (3)
1. contact surface positive pressure varying piezoelectric rotating driver, it is characterized in that, axle (3) is fixedlyed connected with actuator base (8), axle sleeve (7) is rotationally connected with base (8), axle sleeve (7) rotates around axle (3) geometric center, piezoelectric stack one (2), piezoelectric stack two (5) one ends are bonded in respectively to be adjusted on corner block (6) skewed surface, the other end respectively with inertial mass one (1), inertial mass two (4) is bonding, piezoelectric stack one (2) constitutes piezoelectric stack oscillator one with inertial mass one (1), piezoelectric stack two (5) constitutes piezoelectric stack oscillator two with inertial mass two (4), adjusting corner block (6) fixedlys connected with the driving platform on the axle sleeve (7), piezoelectric stack oscillator one, the piezoelectric stack oscillator two 180 ° of balanced configurations of being separated by, oppositely install, and identical with the angle α of horizontal plane, this angle α is 30 °～60 °.
2. contact surface positive pressure varying piezoelectric rotating driver according to claim 1, it is characterized in that, with be separated by 90 ° position of piezoelectric stack oscillator one and piezoelectric stack oscillator two, symmetrical reverse is installed piezoelectric stack oscillator three and piezoelectric stack oscillator four respectively again, these piezoelectric stack oscillator three structures are that piezoelectric stack three (9) is bonding with inertial mass three (10), and these piezoelectric stack oscillator four structures are that piezoelectric stack four (11) is bonding with inertial mass four (12).
3. contact surface positive pressure varying piezoelectric rotating driver according to claim 1 and 2 is characterized in that, the control signal of piezoelectric stack is the periodicity symmetrical wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200933305U CN201022182Y (en) | 2007-02-16 | 2007-02-16 | Contact side positive pressure varying piezoelectricity rotation driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200933305U CN201022182Y (en) | 2007-02-16 | 2007-02-16 | Contact side positive pressure varying piezoelectricity rotation driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201022182Y true CN201022182Y (en) | 2008-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200933305U Expired - Fee Related CN201022182Y (en) | 2007-02-16 | 2007-02-16 | Contact side positive pressure varying piezoelectricity rotation driver |
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| CN (1) | CN201022182Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106628022A (en) * | 2016-12-22 | 2017-05-10 | 苏州市职业大学 | Piezoelectrically-driven unmanned surface robot |
| CN108832840A (en) * | 2018-05-30 | 2018-11-16 | 北京工业大学 | A kind of powered vehicle heating seat based on piezoelectric material |
-
2007
- 2007-02-16 CN CNU2007200933305U patent/CN201022182Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106628022A (en) * | 2016-12-22 | 2017-05-10 | 苏州市职业大学 | Piezoelectrically-driven unmanned surface robot |
| CN108832840A (en) * | 2018-05-30 | 2018-11-16 | 北京工业大学 | A kind of powered vehicle heating seat based on piezoelectric material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20080213 |