CN104410325A - Single-excitation rotating ultrasonic motor - Google Patents
Single-excitation rotating ultrasonic motor Download PDFInfo
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- CN104410325A CN104410325A CN201410740368.1A CN201410740368A CN104410325A CN 104410325 A CN104410325 A CN 104410325A CN 201410740368 A CN201410740368 A CN 201410740368A CN 104410325 A CN104410325 A CN 104410325A
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Abstract
The invention discloses a single-excitation rotating ultrasonic motor. A rotor comprises a turntable and a friction layer arranged on the surface of the turntable; a stator comprises an ultrasonic vibration transducer, an elliptic vibration mode converter, and a friction driving block arranged at the front end of the elliptic vibration mode converter; the ultrasonic vibration transducer comprises a bolt, and a rear cover plate, a piezoelectric ceramic piece, an electrode plate and a front cover plate, which are sequentially arranged on the bolt in a sleeving manner, and the rear cover plate, the piezoelectric ceramic piece, the electrode plate and the front cover plate are connected and pressed tightly through the bolt; the elliptic vibration mode converter is arranged at the front end of the ultrasonic vibration transducer, and serves as a straight girder and oblique beam composite structure; the elliptic vibration mode converter can convert the longitudinal ultrasonic vibration generated by the ultrasonic vibration transducer into longitudinal compound ultrasonic elliptic vibration at the tail end of the elliptic vibration mode converter and on the friction driving block, so as to drive the rotor to be continuously rotated and moved.
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 utilize single excitation ultrasonic elliptical vibratory turn ultrasound electric machine.
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, directly promote 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; The defects such as thus, this type of rotary ultrasonic motor exists complex structure, and high to the contact position required precision between stator and rotor, making and installation is more difficult, the poor stability of the little and speed of motor torque.
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, provides that a kind of structure is simple, power output is large, the rotary ultrasonic motor that cost is low, the life-span is long, motor output torque is large.
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; Described single-excitation ultrasonic oval vibration energy converter entirety is in cylinder, it comprises bolt and is set in back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt successively, front shroud is provided with the ring flange that can connect with other constructional device, back shroud, piezoelectric ceramic piece, electrode slice and front shroud are connected compression by bolt by back shroud and front shroud, 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 the welding of elliptical vibration modal transducer is arranged on the front end of front shroud, elliptical vibration modal transducer comprises the composite construction of straight beam and cant beam formation, straight beam and cant beam are rectangle perpendicular to the cross section of its central axis, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam connects with the front shroud of ultrasonic transducer, and the other end overhangs; The side of one end of cant beam and the front shroud displaced central axis line of ultrasonic transducer connects, the middle part of the other end and straight beam connects, the central axis of cant beam becomes 0-90 degree angle with the central axis of straight beam, and straight beam and cant beam are arc transition with the connection place of ultrasonic transducer front shroud and connect.
The sub-assembly that elliptical vibration modal transducer is formed after being arranged on single-excitation ultrasonic oval vibration energy converter front end is called single excitation ultrasonic elliptical vibratory transducer, to be the object of straight beam and cant beam composite construction be elliptical vibration modal transducer in order to change the mode of oscillation of single excitation ultrasonic elliptical vibratory transducer, make its longitudinal vibration mode frequency and flexural vibration mode frequency close to or equal; Due to the existence of oblique beam structure, the longitudinal ultrasonic vibration that single-excitation ultrasonic oval vibration energy converter produces is after being delivered to cant beam, a part of extensional vibration component and a part of flexural vibrations component is decomposed at cant beam root, the extensional vibration component decomposed when cant beam and after flexural vibrations component is delivered to straight beam, with the extensional vibration phase compound that straight beam is propagated, finally formed at straight beam end and there is the extensional vibration component of certain phase difference and the ultrasonic elliptical vibratory of flexural vibrations component compound.
Described friction-driven block is arranged on the front end of elliptical vibration modal transducer by welding, bonding or screw attachment mode, 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 stable work in work.
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 mechanical oscillation MODAL TRANSFORMATION OF A mechanism and the extensional vibration of single-excitation ultrasonic oval vibration energy converter conversion is decomposed into the extensional vibration of straight beam, the extensional vibration of cant beam and flexural vibrations component, finally synthesize vertical curved composite ultrasonic elliptical vibratory at straight beam end, 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. ring flange, 7. elliptical vibration modal transducer, 8. rotating disk, 9. frictional layer, 10 friction-driven blocks, 11. ultrasonic-frequency power supplies.
Embodiment
Shown in composition graphs 1,2, 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 entirety is in cylinder, it 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, front shroud 5 is provided with the ring flange 6 that can connect with other constructional device, back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5 are connected compression by bolt 1 by back shroud 2 and front shroud 5, constitute the energy conversion part of single stimulated rotation ultrasonic motor, the ultrasonic electric energy exported by ultrasonic-frequency power supply 11 is converted to the ultrasonic vibrational energy of single-excitation ultrasonic oval vibration energy converter.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, the sheet number of piezoelectric ceramic piece 3 is 2.
Elliptical vibration modal transducer 7 and front shroud 5 are made into the front end that an one-piece parts is arranged on front shroud 5, elliptical vibration modal transducer 7 comprises the composite construction of straight beam and cant beam formation, straight beam and cant beam are rectangle perpendicular to the cross section of its central axis, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam connects with the front shroud 5 of ultrasonic transducer, the other end overhangs, and the cross section length of side is 12
×12mm, long 72mm; The side of one end of cant beam and the front shroud 5 displaced central axis line of ultrasonic transducer connects, and the central axis distance of the connection place distance front shroud 5 of cant beam central axis and front shroud 5 is 25mm, and the middle part of the other end and straight beam connects, and the cross section length of side is 12
×12mm.The central axis of cant beam becomes 30 angles with the central axis of straight beam, and straight beam and cant beam are arc transition with the connection place of ultrasonic transducer front shroud 5 and connect, and transition arc radius is 5mm.
Friction-driven block 10 is by the bonding front end being arranged on elliptical vibration modal transducer 7, 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 19.84KHz, impedance is 76 ohm, dynamic electric resistor is 16 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 19.84 ± 0.01KHz, and ultrasonic-frequency power supply 11 has automatic frequency tracking function in designated frequency range.
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 7 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 7 end; And drive friction-driven block 10 to do ultrasonic elliptical vibratory together with elliptical vibration modal transducer 7 end, and then rotor is driven to carry out continuous rotation motion.System after 10 minutes of running reaches steady-working state, and the output voltage of ultrasonic-frequency power supply 11 is 220V, and electric current is 1.35A, and diameter is the edge peripheral linear speed peak value of the rotating disk 8 of 40mm is 64.4mm/s.
Claims (6)
1. a single stimulated rotation ultrasonic motor, comprises rotor and stator, it is characterized in that: 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; Described single-excitation ultrasonic oval vibration energy converter entirety is in cylinder, it comprises bolt and is set in back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt successively, front shroud is provided with the ring flange that can connect with other constructional device, back shroud, piezoelectric ceramic piece, electrode slice and front shroud are connected compression by bolt by back shroud and front shroud; Described elliptical vibration modal transducer is arranged on the front end of front shroud, described elliptical vibration modal transducer comprises the composite construction of straight beam and cant beam formation, straight beam and cant beam are rectangle perpendicular to the cross section of its central axis, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam connects with the front shroud of ultrasonic transducer, and the other end overhangs; The side of one end of cant beam and the front shroud displaced central axis line of ultrasonic transducer connects, the middle part of the other end and straight beam connects, the central axis of cant beam becomes 0-90 degree angle with the central axis of straight beam, and straight beam and cant beam are arc transition with the connection place of ultrasonic transducer front shroud and connect; Described friction-driven block is arranged on the front end of elliptical vibration modal transducer; 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.
2. single stimulated rotation ultrasonic motor 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. single stimulated rotation ultrasonic motor according to claim 1, is characterized in that: described elliptical vibration modal transducer welding is arranged on the front end of front shroud.
4. the single stimulated rotation ultrasonic motor according to claim 1 or 2 or 3, 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 according to claim 1 or 2 or 3, is characterized in that: described friction-driven block is by the bonding front end being arranged on elliptical vibration modal transducer.
6. the single stimulated rotation ultrasonic motor according to claim 1 or 2 or 3, is characterized in that: also comprise a joint bolt, for friction-driven block being connected in the front end of elliptical vibration modal transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410740368.1A CN104410325A (en) | 2014-12-09 | 2014-12-09 | Single-excitation rotating ultrasonic motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410740368.1A CN104410325A (en) | 2014-12-09 | 2014-12-09 | Single-excitation rotating ultrasonic motor |
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| CN104410325A true CN104410325A (en) | 2015-03-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759400A (en) * | 2015-04-01 | 2015-07-08 | 清华大学 | Capacitive coupling type noncontact rotary ultrasonic vibrating head |
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| CN103414373A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-incentive rotating ultrasonic motor |
| CN203406800U (en) * | 2013-08-26 | 2014-01-22 | 苏州科技学院 | Single excitation rotary ultrasonic motor |
| CN203406799U (en) * | 2013-08-26 | 2014-01-22 | 苏州科技学院 | Bidirectional driving rotary ultrasonic motor |
| CN204271947U (en) * | 2014-12-09 | 2015-04-15 | 苏州科技学院 | A kind of single stimulated rotation ultrasonic motor |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012164389A (en) * | 2011-02-07 | 2012-08-30 | Dainippon Printing Co Ltd | Load beam, suspension, suspension with head, hard disc drive, and manufacturing method for load beam |
| CN103401470A (en) * | 2013-08-26 | 2013-11-20 | 苏州科技学院 | Bidirectional driving straight-line supersonic motor |
| CN103414372A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Two-way driving rotating ultrasonic motor |
| CN103414373A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-incentive rotating ultrasonic motor |
| CN203406800U (en) * | 2013-08-26 | 2014-01-22 | 苏州科技学院 | Single excitation rotary ultrasonic motor |
| CN203406799U (en) * | 2013-08-26 | 2014-01-22 | 苏州科技学院 | Bidirectional driving rotary ultrasonic motor |
| CN204271947U (en) * | 2014-12-09 | 2015-04-15 | 苏州科技学院 | A kind of single stimulated rotation ultrasonic motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759400A (en) * | 2015-04-01 | 2015-07-08 | 清华大学 | Capacitive coupling type noncontact rotary ultrasonic vibrating head |
| CN104759400B (en) * | 2015-04-01 | 2017-05-31 | 清华大学 | Capacitively coupled non-contact rotary ultrasonic vibration head |
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Address after: 215009 Suzhou City, Jiangsu province high tech Zone CREE Road, No. 1 Applicant after: Suzhou University of Science and Technology Address before: 215009 Suzhou City, Jiangsu province high tech Zone CREE Road, No. 1 Applicant before: University of Science and Technology of Suzhou |
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Application publication date: 20150311 |
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