CN203225675U - Bidirectional-driving linear ultrasonic motor - Google Patents
Bidirectional-driving linear ultrasonic motor Download PDFInfo
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- CN203225675U CN203225675U CN 201320241824 CN201320241824U CN203225675U CN 203225675 U CN203225675 U CN 203225675U CN 201320241824 CN201320241824 CN 201320241824 CN 201320241824 U CN201320241824 U CN 201320241824U CN 203225675 U CN203225675 U CN 203225675U
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- ultrasonic
- modal transformation
- ultrasonic motor
- vibration
- elliptical vibration
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Abstract
The utility model discloses a bidirectional-driving linear ultrasonic motor. A mover includes a sliding strip and a frictional layer disposed on the surface of the sliding strip; a stator includes a support, two identical ultrasonic vibration transducers fixed by the support, two identical elliptic vibration mode converters, and two friction driving blocks disposed at front ends of the elliptic vibration mode converters. The whole structure of each elliptic vibration mode converter is a cylinder with three rectangular gaps arranged in the upper side and the lower side and distributed in a staggered manner, and the elliptic vibration mode converters are disposed at front ends of the ultrasonic vibration transducers, converting longitudinal ultrasonic vibration produced by the ultrasonic vibration transducers into elliptic vibration of friction driving blocks and tail ends of the elliptic vibration mode converters. And the mover is driven to move in a bidirectional continuous rectilinear way when the two ultrasonic vibration transducers work respectively.
Description
Technical field
The utility model relates to the ultrasound electric machine field that utilizes the piezoelectric ceramic inverse piezoelectric effect, especially relates to a kind of bi-directional drive linear ultrasonic motor.
Background technology
Linear ultrasonic motor is a kind of novel electrical micro-machine that develops rapidly and use the eighties in 20th century, be to utilize the inverse piezoelectric effect of piezoelectric to realize the mechanical-electric coupling device that electric energy-mechanical energy is changed, by the rubbing action between stator and the mover, the macroscopical straight line (rotation) that elastomeric micro breadth oscillation is converted to mover moves, and directly drives load.Because of advantages such as it has that volume is little, in light weight, low-speed big, noise are little, response is fast, positioning accuracy is high, no electromagnetic interference and environmental suitability are strong, obtained increasingly extensive application in technical fields such as medical treatment, Aero-Space, robot, MEMS.
Single excitation mode conversion hysteria ultrasound electric machine is a kind of of ultrasound electric machine, and it is the excitation that utilizes one group of piezo ceramic element, and the MODAL TRANSFORMATION OF A device by special construction produces stator to have the complex vibration of two kinds of mode of oscillation components.If exist certain phase difference and frequency close between these two mode of oscillations, the end face particle of stator will produce the elliptical orbit vibration on stator and the rotor contact interface, thereby obtains motion and the moment of torsion of rotor by the friction between stator and the rotor.The ultrasound electric machine that utilizes the MODAL TRANSFORMATION OF A principle to make only needs one group of control circuit and driving power thereof, and control-driven system is simple, and manufacturing cost, control difficulty all can be reduced.
The research and development of present domestic linear ultrasonic motor is very fast, and colleges and universities such as Tsing-Hua University, Nanjing Aero-Space University, Harbin Institute of Technology have successively launched research to linear ultrasonic motor.Since two thousand four, the Chinese patent net published annular standing wave linear ultrasonic motor [200510046044.9], prism longitudinal bend composite vibrator linear supersonic motor [200610132316.1], triangle bended plate type piezoelectric straight line ultrasound electric motor [200710045921.X], H shape standing wave linear ultrasonic motor oscillator [200820014739.8], column structure dual-wheel foot driving linear ultrasonic motor and electric excitation method thereof [200710020963.8] successively, based on the K shape linear ultrasonic motor patents such as [200810124426.2] of continuous amplitude transformer principle.But existing linear ultrasonic motor exists complex structure, power output is little, manufacturing is difficult, to deficiency such as make that matching requirements are higher, cost is higher and the life-span is short.These problems have restricted their application in industrial production.
Summary of the invention
The utility model provides a kind of novel bi-directional drive linear ultrasonic motor, and purpose is the deficiency that exists in the above-mentioned linear ultrasonic motor in order to overcome.
A kind of bi-directional drive linear ultrasonic motor comprises stator and mover, and mover comprises draw runner and is arranged on the frictional layer on draw runner surface; Described stator comprises support, by support fixing two identical ultrasonic vibration transducers, two identical elliptical vibration MODAL TRANSFORMATION OF A device friction-driven pieces identical with two; The ultrasonic vibration transducer comprises that bolt reaches back shroud, piezoelectric ceramic piece, electrode slice and the front shroud that is set in successively on the bolt, front shroud and bolt are fixed back shroud, piezoelectric ceramic piece, electrode slice and front shroud by thread connection, constituted the power conversion part of bi-directional drive linear ultrasonic motor, the ultrasonic electric energy of A ultrasonic-frequency power supply and the output of B ultrasonic acoustic-electric source has been converted to the ultrasonic vibrational energy of ultrasonic transducer.
Described elliptical vibration MODAL TRANSFORMATION OF A device and front shroud are made into the front end that an integral body is arranged on front shroud, perhaps utilize additional connection double-screw bolt elliptical vibration MODAL TRANSFORMATION OF A device to be connected in the front end of front shroud, elliptical vibration MODAL TRANSFORMATION OF A device integral body is cylindrical, it offers three rectangular indentation that are dislocatedly distributed in both sides up and down, the purpose that rectangular indentation is set is in order to change the mode of oscillation of ultrasonic vibration transducer, make its extensional vibration model frequency and flexural vibration mode frequency approaching or equal, the longitudinal ultrasonic that the ultrasonic vibration transducer is produced vibrates the vertical composite ultrasonic elliptical vibratory of bending that is converted to elliptical vibration MODAL TRANSFORMATION OF A device end.
Described friction-driven piece is arranged on the front end of elliptical vibration MODAL TRANSFORMATION OF A device by welding or bonding way, and the friction-driven piece contacts with frictional layer on the draw runner.Two ultrasonic vibration transducers are linked together by the ring flange of support and ultrasonic vibration transducer, and support is used for fixing stator and the precompression device is installed, stator is connected formation bi-directional drive linear ultrasonic motor in aggregates with mover, angle is 20 degree ~ 160 degree between two ultrasonic vibration transducer axis after ring flange and support are fixing.
Before not adding ultrasonic voltage signal driving, the friction-driven piece 10 of two elliptical vibration MODAL TRANSFORMATION OF A device front ends contacts with mover simultaneously.
During driving, one of them ultrasonic transducer suspends, the work of another one ultrasonic transducer.Namely be: send into the direct current negative pressure signal of telecommunication to the ultrasonic transducer electrode slice that needs suspend, utilize piezoelectric effect to make this ultrasonic vibration transducer axial shrinkage, and then the friction-driven piece of elliptical vibration MODAL TRANSFORMATION OF A device front end is suspended on the mover.The ultrasonic transducer that need drive work to another one is sent into ultrasonic sinusoidal electric signals, as the ultrasonic signal of telecommunication of ultrasonic-frequency power supply output being linked into the electrode slice of ultrasonic vibration transducer, this ultrasonic vibration transducer namely produces ultrasonic vibration, after ultrasonic vibrational energy is delivered to elliptical vibration MODAL TRANSFORMATION OF A device end from the ultrasonic vibration transducer, be converted to extensional vibration and the compound vertical curved composite ultrasonic elliptical vibratory of flexural vibrations with certain phase difference, namely be converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration MODAL TRANSFORMATION OF A device end; And drive the friction-driven piece and elliptical vibration MODAL TRANSFORMATION OF A device end is done ultrasonic elliptical vibratory together, and then drive mover and carry out continuous rectilinear motion.
When needs mover during to another direction rectilinear motion, the ultrasonic signal of telecommunication type of drive of two ultrasonic transducers of exchange gets final product.Compare the bi-directional drive linear ultrasonic motor that existing document is introduced, this linear ultrasonic motor has that power capacity is big, energy conversion efficiency is high, simple in structure, easy to manufacture, advantage such as cost is low, the rigidity of structure is big, control-driven system is simple and vibration performance is stable.
Further, two of described bi-directional drive linear ultrasonic motor ultrasonic vibration transducers have one group of extensional vibration piezoelectric ceramic piece respectively.
Further, two of described bi-directional drive linear ultrasonic motor ultrasonic vibration transducers need one road ultrasonic signal of telecommunication excitation respectively.
The utility model has adopted mechanical oscillation MODAL TRANSFORMATION OF A mechanism the extensional vibration of ultrasonic transducer to be converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration MODAL TRANSFORMATION OF A device, simplified the overall structure of bi-directional drive linear ultrasonic motor, greatly reduce the complexity of vibrational system, manufacturing, assembly difficulty and production cost have been reduced, whole bi-directional drive linear ultrasonic motor is simple in structure, easy to manufacture, is conducive to the realization of microminiaturized target; Two of this utility model ultrasonic transducers all only need No. one control circuit and the ultrasonic signal of telecommunication to encourage in addition, the control difficulty is low, avoided heterogeneous ultrasonic vibration to be compounded to form the complicated ultrasonic-frequency power supply development cost of elliptical vibration transducer, control circuit and ultrasonic-frequency power supply structure have been simplified, control circuit and ultrasonic-frequency power supply cost have been reduced, control circuit and ultrasonic-frequency power supply volume have been reduced, be easy to realize the microminiaturization of control circuit and ultrasonic-frequency power supply, integrated, improved reliability, service behaviour is more stable, has a extensive future.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is application example schematic diagram of the present utility model.
Number in the figure explanation: 1. bolt, 2. back shroud, 3. piezoelectric ceramic piece, 4. electrode slice, 5. front shroud, 6. elliptical vibration MODAL TRANSFORMATION OF A device, 7. rectangular indentation, 8. draw runner, 9. frictional layer, 10 friction-driven pieces, 11. supports, 12.A ultrasonic-frequency power supply, 13.B ultrasonic-frequency power supply
Embodiment
Shown in Fig. 1,2, a kind of bi-directional drive linear ultrasonic motor comprises stator and mover, and mover comprises draw runner 8 and is arranged on the frictional layer 9 on draw runner 8 surfaces; Described stator comprises support 11, passes through two identical ultrasonic vibration transducers, two identical elliptical vibration MODAL TRANSFORMATION OF A device friction-driven pieces identical with two that support 11 is fixed; The ultrasonic vibration transducer comprises that bolt (1) reaches back shroud (2), piezoelectric ceramic piece (3), electrode slice (4) and the front shroud (5) that is set in successively on the bolt (1), front shroud 5 and bolt 1 are fixed back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5 by thread connection, constituted the power conversion part of bi-directional drive linear ultrasonic motor, the ultrasonic electric energy of ultrasonic- frequency power supply 12 and 12 outputs has been converted to the ultrasonic vibrational energy of ultrasonic transducer.Two ultrasonic vibration transducers of this bi-directional drive linear ultrasonic motor have one group of extensional vibration piezoelectric ceramic piece 3 respectively, piezoelectric ceramic transducer section diameter 30mm, and piezoelectric ceramic piece 3 materials are PZT-8, are of a size of:
Ф 30 * Ф 15 * 5mm, the sheet number is 2.
Described elliptical vibration MODAL TRANSFORMATION OF A device 6 and front shroud 5 are made into the front end that an integral body is arranged on front shroud 5, elliptical vibration MODAL TRANSFORMATION OF A device 6 integral body are cylindrical, diameter 15mm, both sides offer three rectangular indentation that are dislocatedly distributed 7 up and down, 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 piece 10 is by the bonding front end that is arranged on elliptical vibration MODAL TRANSFORMATION OF A device 6, and friction-driven piece 10 contacts with frictional layer 9 on the draw runner 8.Two ultrasonic vibration transducers are linked together by the ring flange of support 11 and ultrasonic vibration transducer, and support 11 is used for fixing stator and the precompression device is installed, stator is connected formation bi-directional drive linear ultrasonic motor in aggregates with mover, angle is 90 degree between two ultrasonic vibration transducer axis after ring flange and support are fixing.
Two ultrasonic transducer natural frequencys of bi-directional drive linear ultrasonic motor are all 25.32KHz mutually, impedance is respectively 86 and 82 ohm, dynamic electric resistor is 17 and 15 ohm, two ultrasonic vibration transducers need one road ultrasonic signal of telecommunication excitation respectively, A ultrasonic-frequency power supply 12 and B ultrasonic acoustic-electric source 13, its output voltage range is 0-400V, current range is 0-4A, output frequency is 25.32 ± 0.01KHz, and A ultrasonic-frequency power supply 12 and B ultrasonic acoustic-electric source 13 all have the automatic frequency tracking function in designated frequency range.
Before not adding ultrasonic voltage signal driving, the friction-driven piece 10 of two elliptical vibration MODAL TRANSFORMATION OF A device 6 front ends contacts with mover simultaneously.
During driving, send into the direct current negative pressure signal of telecommunication to the ultrasonic transducer electrode slice that needs suspend, utilize piezoelectric effect to make this ultrasonic vibration transducer axial shrinkage, and then the friction-driven piece 10 of elliptical vibration MODAL TRANSFORMATION OF A device 6 front ends is suspended on the mover; The ultrasonic transducer that need drive work to another one is sent into ultrasonic sinusoidal electric signals, after the ultrasonic signal of telecommunication of B ultrasonic acoustic-electric source 13 outputs is linked into the electrode slice 4 of ultrasonic vibration transducer, this ultrasonic vibration transducer namely produces ultrasonic vibration, after ultrasonic vibrational energy is delivered to elliptical vibration MODAL TRANSFORMATION OF A device 6 ends from the ultrasonic vibration transducer, be converted to extensional vibration and the compound vertical curved composite ultrasonic elliptical vibratory of flexural vibrations with certain phase difference, namely be converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration MODAL TRANSFORMATION OF A device 6 ends; And drive friction-driven piece 10 and elliptical vibration MODAL TRANSFORMATION OF A device 6 ends are done ultrasonic elliptical vibratory together, and then drive mover and carry out continuous rectilinear motion.Move that system reaches the stable vibration state after 10 minutes, the output voltage in B ultrasonic acoustic-electric source 13 is 240V, and electric current is 1.45A, and the mover velocity peak values is 16.8mm/s.
The ultrasonic signal of telecommunication type of drive of two ultrasonic transducers of exchange moves that the output voltage of A ultrasonic-frequency power supply 12 is 240V after 10 minutes, and electric current is 1.50A, and mover carries out rectilinear motion to another direction, and its velocity peak values is 17.1mm/s.
Claims (5)
1. a bi-directional drive linear ultrasonic motor comprises mover and stator, and mover comprises draw runner and is arranged on the frictional layer on draw runner surface; It is characterized in that: stator comprises support, by support fixing two identical ultrasonic vibration transducers, two identical elliptical vibration MODAL TRANSFORMATION OF A device friction-driven pieces identical with two; The ultrasonic vibration transducer comprises that bolt reaches back shroud, piezoelectric ceramic piece, electrode slice and the front shroud that is set in successively on the bolt, and front shroud and bolt are fixed back shroud, piezoelectric ceramic piece, electrode slice and front shroud by thread connection; Described elliptical vibration MODAL TRANSFORMATION OF A device is arranged on the front end of front shroud, its integral body is cylindrical, both sides offer three rectangular indentation that are dislocatedly distributed up and down, described friction-driven piece is arranged on the front end of elliptical vibration MODAL TRANSFORMATION OF A device, and angle is 20 degree ~ 160 degree between two ultrasonic vibration transducer axis after ring flange and support are fixing.
2. a kind of bi-directional drive linear ultrasonic motor according to claim 1, it is characterized in that: described elliptical vibration MODAL TRANSFORMATION OF A device and front shroud are made into the front end that an integral body is arranged on front shroud.
3. a kind of bi-directional drive linear ultrasonic motor according to claim 1 is characterized in that: also comprise the connection double-screw bolt, be used for elliptical vibration MODAL TRANSFORMATION OF A device is connected in the front end of front shroud.
4. a kind of bi-directional drive linear ultrasonic motor according to claim 1, it is characterized in that: described friction-driven piece is arranged on the front end of elliptical vibration MODAL TRANSFORMATION OF A device by welding.
5. a kind of bi-directional drive linear ultrasonic motor according to claim 1, it is characterized in that: described friction-driven piece is by the bonding front end that is arranged on elliptical vibration MODAL TRANSFORMATION OF A device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320241824 CN203225675U (en) | 2013-05-08 | 2013-05-08 | Bidirectional-driving linear ultrasonic motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320241824 CN203225675U (en) | 2013-05-08 | 2013-05-08 | Bidirectional-driving linear ultrasonic motor |
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| CN203225675U true CN203225675U (en) | 2013-10-02 |
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| CN 201320241824 Expired - Fee Related CN203225675U (en) | 2013-05-08 | 2013-05-08 | Bidirectional-driving linear ultrasonic motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227584A (en) * | 2013-05-08 | 2013-07-31 | 苏州科技学院 | Bidirectional driving linear ultrasonic motor |
| CN104362895A (en) * | 2014-12-09 | 2015-02-18 | 苏州科技学院 | Singe-stimulating linear ultrasonic motor |
| CN104410322A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single electric signal excited ultrasound elliptic-vibration multi-vibrator material conveying device |
-
2013
- 2013-05-08 CN CN 201320241824 patent/CN203225675U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227584A (en) * | 2013-05-08 | 2013-07-31 | 苏州科技学院 | Bidirectional driving linear ultrasonic motor |
| CN103227584B (en) * | 2013-05-08 | 2016-03-23 | 苏州科技学院 | A kind of bi-directional drive linear ultrasonic motor |
| CN104362895A (en) * | 2014-12-09 | 2015-02-18 | 苏州科技学院 | Singe-stimulating linear ultrasonic motor |
| CN104410322A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single electric signal excited ultrasound elliptic-vibration multi-vibrator material conveying device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20160508 |