CN103208943B - A kind of single stimulated rotation ultrasonic motor - Google Patents
A kind of single stimulated rotation ultrasonic motor Download PDFInfo
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- CN103208943B CN103208943B CN201310164613.4A CN201310164613A CN103208943B CN 103208943 B CN103208943 B CN 103208943B CN 201310164613 A CN201310164613 A CN 201310164613A CN 103208943 B CN103208943 B CN 103208943B
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- ultrasonic motor
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Abstract
The invention discloses a kind of single stimulated rotation ultrasonic motor, rotor comprises rotating disk and is arranged on the frictional layer of disc surfaces; Stator comprises single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer and is arranged on the friction-driven block of elliptical vibration modal transducer front end; Single-excitation ultrasonic oval vibration energy converter comprises bolt and is set in back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt successively, and front shroud and bolt pass through thread connection; Elliptical vibration modal transducer is arranged on the front end of front shroud, its entirety is cylindrical, upper and lower both sides offer three rectangular indentation be dislocatedly distributed, the longitudinal ultrasonic vibration that single-excitation ultrasonic oval vibration energy converter produces can be converted to the elliptical vibration of elliptical vibration modal transducer end and friction-driven block, and drive rotor to carry out continuous rotation motion.
Description
Technical field
The present invention relates to the ultrasound electric machine field utilizing piezoelectric ceramic inverse piezoelectric effect, especially relate to a kind of single stimulated rotation ultrasonic motor.
Background technology
Rotary ultrasonic motor is the novel electrical micro-machine of one developing rapidly and apply the eighties in 20th century, it is the electric coupling apparatus utilizing the inverse piezoelectric effect of piezoelectric to realize electric energy-mechanic to change, by the rubbing action between stators and rotators, elastomeric micro breadth oscillation is converted to macroscopical rotary motion of rotor, Direct driver load.Because it has that volume is little, lightweight, low-speed big, noise are little, response is fast, positioning precision is high, without electromagnetic interference and the advantage such as environmental suitability is strong, obtains increasingly extensive application in technical fields such as medical treatment, Aero-Space, robot, MEMS.
The problems such as in current existing rotary-type ultrasound electric machine, the flexural vibration mode outside main employing face is combined into the capable ripple of end face, and drives rotor turns, and ubiquity driving moment is little, and axial volume is large, wearing and tearing difference in the internal-and external diameter contact zone of rotor is large; In addition, even if having employed in plane vibration mode, in order to can radial tightening power in applying face, the disk of oscillator or rotor or annulus make two semi-discs or semicircular ring, middle be connected into disk or annulus with the radial tightening power in applying face by spring, also be difficult to realize large torque at present, and functional reliability is low.Be CN101030740A at publication number, denomination of invention is in the patent documentation of " bending-rotation ultrasonic motor of singlephase drive ", the structure disclosing a kind of body is the singlephase drive standing wave rotary ultrasonic motor of taper, this motor relies on six piezoelectric ceramic pieces be superimposed together vertically to excite the vibration of stator, and six piezoelectric ceramic pieces rely on clamp nut and last item cover to be fixed on axis.Although this motor has the advantages such as output torque is larger, but six of motor piezoelectric ceramic pieces will to stagger 60 installations mutually by polarization subregion, its complex structure, and misplace because the screw (revolving force) of clamp nut very easily causes between piezoelectric ceramic piece in the compaction process of piezoelectric ceramic piece, be difficult to the technical requirement ensureing dislocation 60 degree between adj acent piezoelectric potsherd; In addition, be not with any positioner between this motor stator and rotor, this makes stator and rotor contact position precision between the two be affected, and then affects the stability of motor torque and speed; Thus, there is complex structure in this type of rotary ultrasonic motor, high to the contact position required precision between stator and rotor, the defects such as making and installation is more difficult, the poor stability of motor torque and speed.
Summary of the invention
The invention provides a kind of novel single stimulated rotation ultrasonic motor, object is to overcome the deficiency existed in above-mentioned rotary ultrasonic motor.
A kind of single stimulated rotation ultrasonic motor, comprises stators and rotators, and rotor comprises rotating disk and is arranged on the frictional layer of disc surfaces; Stator comprises single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer and friction-driven block; Single-excitation ultrasonic oval vibration energy converter comprises bolt and is set in back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt successively, back shroud, piezoelectric ceramic piece, electrode slice and front shroud are fixed by thread connection by front shroud and bolt, constitute the energy conversion part of single stimulated rotation ultrasonic motor, the ultrasonic electric energy that ultrasonic-frequency power supply exports is converted to the ultrasonic vibrational energy of ultrasonic transducer.
Described elliptical vibration modal transducer and front shroud are made into the front end that is integrally provided in front shroud, or utilize an additional connection stud elliptical vibration modal transducer to be connected in the front end of front shroud, elliptical vibration modal transducer entirety is cylindrical, its upper and lower both sides offer three rectangular indentation be dislocatedly distributed, the object arranging rectangular indentation is the mode of oscillation in order to change single-excitation ultrasonic oval vibration energy converter, make its longitudinal vibration mode frequency and flexural vibration mode frequency close to or equal, the longitudinal ultrasonic vibration that single-excitation ultrasonic oval vibration energy converter produces is converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer end.Described friction-driven block is arranged on the front end of elliptical vibration modal transducer by welding or bonding way, and friction-driven block contacts with the frictional layer on rotating disk.The ring flange of single-excitation ultrasonic oval vibration energy converter is used for installing stator and precompression device, and stators and rotators is connected the single stimulated rotation ultrasonic motor of formation in aggregates, the single-excitation ultrasonic oval vibration energy converter axis after ring flange is fixed and the angle of plane of rotor disc are 20 degree ~ 160 degree.
After the ultrasonic electric signal of ultrasonic-frequency power supply output is linked into the electrode slice of single-excitation ultrasonic oval vibration energy converter, namely single-excitation ultrasonic oval vibration energy converter produces ultrasonic vibration, after ultrasonic vibrational energy is delivered to elliptical vibration modal transducer end from single-excitation ultrasonic oval vibration energy converter, be converted to the vertical curved composite ultrasonic elliptical vibratory of extensional vibration and the flexural vibrations compound with certain phase difference, be namely converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer end; And drive friction-driven block to do ultrasonic elliptical vibratory together with elliptical vibration modal transducer end, and then rotor is driven to carry out continuous rotation motion.Compare single stimulated rotation ultrasonic motor that existing document is introduced, this rotary ultrasonic motor has that power capacity is large, energy conversion efficiency is high, structure is simple, easy to manufacture, cost is low, the rigidity of structure is large, control-driven system is simple and the advantage such as vibration performance is stable.
Further, described single stimulated rotation ultrasonic motor only has one group of extensional vibration piezoelectric ceramic piece.
Further, described single stimulated rotation ultrasonic motor Zhi Xu mono-road ultrasonic electric signal excitation.
Present invention employs the vertical curved composite ultrasonic elliptical vibratory that mechanical oscillation MODAL TRANSFORMATION OF A mechanism is converted to the extensional vibration of ultrasonic transducer elliptical vibration modal transducer, simplify the overall structure of single stimulated rotation ultrasonic motor, greatly reduce the complexity of vibrational system, reduce manufacture, assembly difficulty and production cost, whole single stimulated rotation ultrasonic motor structure is simple, easy to manufacture, is conducive to the realization of microminiaturized target; This invention only needs a road control circuit and ultrasonic electric signal to encourage in addition, control difficulty is low, avoid the complicated ultrasonic-frequency power supply development cost that two-phase or multiphase ultrasonic vibration is compounded to form elliptical vibration transducer, simplify control circuit and ultrasonic-frequency power supply structure, reduce control circuit and ultrasonic-frequency power supply cost, reduce control circuit and ultrasonic-frequency power supply volume, be easy to the microminiaturization realizing control circuit and ultrasonic-frequency power supply, integrated, improve reliability, service behaviour is more stable, has a extensive future.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is application example schematic diagram of the present invention.
Number in the figure illustrates: 1. bolt, 2. back shroud, 3. piezoelectric ceramic piece, 4. electrode slice, 5. front shroud, 6. elliptical vibration modal transducer, 7. rectangular indentation, 8. rotating disk, 9. frictional layer, 10 friction-driven blocks, 11. ultrasonic-frequency power supplies
Embodiment
Shown in composition graphs 1, a kind of single stimulated rotation ultrasonic motor, comprises stators and rotators, and rotor comprises rotating disk 8 and is bonded in the frictional layer 9 on rotating disk 8 surface; Stator comprises single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer 6 and friction-driven block 10; Single-excitation ultrasonic oval vibration energy converter comprises bolt 1 and is set in back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and the front shroud 5 on bolt 1 successively, and back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5 are fixed by thread connection by front shroud 5 and bolt 1.This single stimulated rotation ultrasonic motor only has one group of extensional vibration piezoelectric ceramic piece 3, piezoelectric ceramic transducer section diameter 30mm, and the material of piezoelectric ceramic piece 3 is PZT-8, is of a size of:
Ф 30mm × Ф 15mm × 5mm, sheet number is 2.
Described elliptical vibration modal transducer 6 and front shroud 5 are made into the front end that is integrally provided in front shroud 5, elliptical vibration modal transducer 6 entirety is cylindrical, diameter 15mm, upper and lower both sides offer three rectangular indentation be dislocatedly distributed 7, three rectangular indentation 7 width are 6mm, and the degree of depth is 3mm, and the distance of the centre-to-centre spacing front end face of three rectangular indentation 7 is respectively 15mm, 25mm, 35mm.Described friction-driven block 10 is by the bonding front end being arranged on elliptical vibration modal transducer 6, and friction-driven block 10 contacts with the frictional layer 9 on rotating disk 8.Utilize the ring flange of single-excitation ultrasonic oval vibration energy converter to carry out installation stator and precompression device, stators and rotators is connected the single stimulated rotation ultrasonic motor of formation in aggregates, the angle of the single-excitation ultrasonic oval vibration energy converter axis after ring flange is fixed and rotating disk 8 plane is 45 degree.
This single stimulated rotation ultrasonic motor stator natural frequency is 25.32KHz, impedance is 86 ohm, dynamic electric resistor is 17 ohm, the ultrasonic electric signal excitation of Zhi Xu mono-road, ultrasonic-frequency power supply 11 output voltage range is 0-400V, current range is 0-4A, and output frequency is 25.32 ± 0.01KHz, and ultrasonic-frequency power supply 11 has automatic frequency tracking function in designated frequency range.
Shown in composition graphs 2, after the ultrasonic electric signal of ultrasonic-frequency power supply output is linked into the electrode slice 4 of single-excitation ultrasonic oval vibration energy converter, namely single-excitation ultrasonic oval vibration energy converter produces ultrasonic vibration, after ultrasonic vibrational energy is delivered to elliptical vibration modal transducer 6 end from single-excitation ultrasonic oval vibration energy converter, be converted to the vertical curved composite ultrasonic elliptical vibratory of extensional vibration and the flexural vibrations compound with certain phase difference, be namely converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer 6 end; And drive friction-driven block 10 to do ultrasonic elliptical vibratory together with elliptical vibration modal transducer 6 end.System after 10 minutes of running reaches stable vibration state, the output voltage of ultrasonic-frequency power supply 11 is 240V, and electric current is 1.45A, when after friction-driven block and rotor contact, drive rotor to carry out continuous rotation motion, diameter is the edge peripheral linear speed peak value of the rotating disk 8 of 40mm is 56.2mm/s.
Claims (5)
1. a single stimulated rotation ultrasonic motor, comprises rotor and stator, and rotor comprises rotating disk and is arranged on the frictional layer of disc surfaces; It is characterized in that: described stator comprises single-excitation ultrasonic oval vibration energy converter, elliptical vibration modal transducer and friction-driven block; Single-excitation ultrasonic oval vibration energy converter comprises bolt and is set in back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt successively, and back shroud, piezoelectric ceramic piece, electrode slice and front shroud are fixed by thread connection by front shroud and bolt; Described elliptical vibration modal transducer is arranged on the front end of front shroud, its entirety is cylindrical, upper and lower both sides offer three rectangular indentation be dislocatedly distributed, described friction-driven block is arranged on the front end of elliptical vibration modal transducer, and the single-excitation ultrasonic oval vibration energy converter axis after ring flange is fixed and the angle of plane of rotor disc are 20 degree ~ 160 degree; Described single stimulated rotation ultrasonic motor only has one group of extensional vibration piezoelectric ceramic piece, and Zhi Xu mono-road ultrasonic electric signal encourages.
2. the single stimulated rotation ultrasonic motor of one according to claim 1, is characterized in that: described elliptical vibration modal transducer and front shroud are made into the front end that is integrally provided in front shroud.
3. the single stimulated rotation ultrasonic motor of one according to claim 1, is characterized in that: also comprise one and connect stud, for elliptical vibration modal transducer being connected in the front end of front shroud.
4. the single stimulated rotation ultrasonic motor of one according to claim 1, is characterized in that: described friction-driven block is arranged on the front end of elliptical vibration modal transducer by welding.
5. the single stimulated rotation ultrasonic motor of one according to claim 1, is characterized in that: described friction-driven block is by the bonding front end being arranged on elliptical vibration modal transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310164613.4A CN103208943B (en) | 2013-05-08 | 2013-05-08 | A kind of single stimulated rotation ultrasonic motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310164613.4A CN103208943B (en) | 2013-05-08 | 2013-05-08 | A kind of single stimulated rotation ultrasonic motor |
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| CN103208943A CN103208943A (en) | 2013-07-17 |
| CN103208943B true CN103208943B (en) | 2015-09-02 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447557B (en) * | 2013-08-26 | 2015-11-18 | 苏州科技学院 | Single excitation ultrasonic elliptical vibratory truning fixture |
| CN103414373B (en) * | 2013-08-26 | 2015-09-02 | 苏州科技学院 | Single stimulated rotation ultrasonic motor |
| CN104377985A (en) * | 2014-12-09 | 2015-02-25 | 苏州科技学院 | Single electro-signal excited ultrasonic elliptical vibration precision conveyor |
| CN104467519A (en) * | 2014-12-09 | 2015-03-25 | 苏州科技学院 | Single electric signal excitation ultrasonic elliptic vibration multi-vibrator bidirectional material conveying device |
| CN104440573A (en) * | 2014-12-09 | 2015-03-25 | 苏州科技学院 | Single electrical signal excitation ultrasonic elliptic vibration grinding wheel dressing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474503A (en) * | 2003-07-30 | 2004-02-11 | 哈尔滨工业大学 | Supersonic motor standing wave driving vibrator capable of realizing linear or rotary movement |
| CN101656490A (en) * | 2009-09-08 | 2010-02-24 | 华南农业大学 | Longitudinal bending compound modal linear ultrasonic motor |
| CN203225677U (en) * | 2013-05-08 | 2013-10-02 | 苏州科技学院 | Single-excitation rotary ultrasonic motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100965433B1 (en) * | 2008-04-03 | 2010-06-24 | 한국과학기술연구원 | Omni-directional linear piezoelectric ultrasonic motor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474503A (en) * | 2003-07-30 | 2004-02-11 | 哈尔滨工业大学 | Supersonic motor standing wave driving vibrator capable of realizing linear or rotary movement |
| CN101656490A (en) * | 2009-09-08 | 2010-02-24 | 华南农业大学 | Longitudinal bending compound modal linear ultrasonic motor |
| CN203225677U (en) * | 2013-05-08 | 2013-10-02 | 苏州科技学院 | Single-excitation rotary ultrasonic motor |
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