CN103401470A - Bidirectional driving straight-line supersonic motor - Google Patents
Bidirectional driving straight-line supersonic motor Download PDFInfo
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- CN103401470A CN103401470A CN2013103738639A CN201310373863A CN103401470A CN 103401470 A CN103401470 A CN 103401470A CN 2013103738639 A CN2013103738639 A CN 2013103738639A CN 201310373863 A CN201310373863 A CN 201310373863A CN 103401470 A CN103401470 A CN 103401470A
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Abstract
The invention discloses a bidirectional driving straight-line supersonic motor. According to the bidirectional driving straight-line supersonic motor, an active cell comprises a slide strip and a friction layer arranged on the surface of the slide strip; a stator comprises a bracket, two same supersonic vibration energy converters fixed by the bracket, two same oval vibration mode converters, and two same friction driving blocks arranged on the front ends of the oval vibration mode converters, wherein the oval vibration mode converters are arranged on the front ends of the supersonic vibration energy converters and are of wedged-shaped structures; the oval vibration mode converters can be used for converting vertical supersonic vibration generated by the supersonic vibration energy converters into vertical bent compound supersonic oval vibration of the tail ends of the oval vibration mode converters and the friction driving blocks; when the two supersonic vibration energy converters work respectively, the two corresponding friction driving blocks drive the active cell to do continuous straight-line movement respectively.
Description
Technical field
The present invention relates to utilize the ultrasound electric machine field of piezoelectric ceramic inverse piezoelectric effect, especially relate 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 apply the eighties in 20th century, to utilize the inverse piezoelectric effect of piezoelectric to realize the electric coupling apparatus that electric energy-mechanical energy is changed, by the rubbing action between stator and mover, elastomeric micro breadth oscillation is converted to macroscopical straight line (rotation) motion of mover, directly drive load.Because it has that volume is little, lightweight, low-speed big, noise is little, response is fast, positioning precision is high, without electromagnetic interference and the advantage such as environmental suitability is strong, in technical fields such as medical treatment, Aero-Space, robot, MEMS, obtained increasingly extensive application.
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 between these two mode of oscillations, exist certain phase difference and frequency close, on stator and rotor contact interface, the end face particle of stator will produce the elliptical orbit vibration, thereby by the friction between stator and rotor, obtains motion and the moment of torsion of 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 the 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 successively 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], based on the patents such as K shape linear ultrasonic motor [200810124426.2] of continuous amplitude transformer principle.But existing linear ultrasonic motor exists complex structure, power output is little, manufacture is difficult, to the deficiency such as manufacture 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 invention provides a kind of novel bi-directional drive linear ultrasonic motor, purpose is the deficiency that exists in above-mentioned linear ultrasonic motor in order to overcome.
The bi-directional drive linear ultrasonic motor, comprise stator and mover, and mover comprises draw runner and is arranged on the frictional layer on draw runner surface; Two identical ultrasonic vibration transducers, two identical elliptical vibration MODAL TRANSFORMATION OF A devices and two identical friction-driven pieces that described stator comprises support, fixes by support; Described ultrasonic vibration transducer outline is cylindrical, it comprises bolt and is set in successively back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt, on front shroud, be provided with and can connect with support the ring flange of use, back shroud and front shroud connect back shroud, piezoelectric ceramic piece, electrode slice and front shroud to compress by bolt, formed 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 two ultrasonic vibration transducers.
described elliptical vibration MODAL TRANSFORMATION OF A device and front shroud are made into the front end of a whole installation at front shroud, perhaps utilize an additional connection double-screw bolt elliptical vibration MODAL TRANSFORMATION OF A device to be connected in to the front end of front shroud, elliptical vibration MODAL TRANSFORMATION OF A device is the inclined wedge-shaped structure, the former integral body of inclined wedge-shaped structure elliptical vibration MODAL TRANSFORMATION OF A device is cuboid, after being cut a part, ultrasonic vibration transducer axis direction one side forms the inclined wedge-shaped structure, form in two sides of inclined wedge-shaped, a cut parallel sided is not in the ultrasonic vibration transducer axis, the another side that was cut becomes 3-30 degree angle with the ultrasonic vibration transducer axis.
the purpose that makes elliptical vibration MODAL TRANSFORMATION OF A device form the inclined wedge-shaped structure is in order to change the mode of oscillation of ultrasonic vibration transducer, its extensional vibration model frequency and flexural vibration mode frequency are approached or equate, existence due to inclined wedge-shaped structure elliptical vibration MODAL TRANSFORMATION OF A device, the longitudinal ultrasonic vibration that the ultrasonic vibration transducer produces is after being delivered to inclined wedge-shaped structure elliptical vibration MODAL TRANSFORMATION OF A device, end at inclined wedge-shaped structure elliptical vibration MODAL TRANSFORMATION OF A device is decomposed into a part of extensional vibration component and a part of flexural vibrations component, and two oscillating components have certain phase difference, and then be compounded to form the elliptical orbit vibration at the end of inclined wedge-shaped structure elliptical vibration MODAL TRANSFORMATION OF A device.
Described friction-driven piece is arranged on the front end of elliptical vibration MODAL TRANSFORMATION OF A device by welding, bonding or screw attachment mode, the friction-driven piece contacts with the frictional layer on rotating disk.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 to formation bi-directional drive linear ultrasonic motor in aggregates with mover, between two ultrasonic vibration transducer axis after ring flange and support are fixing, angle is 20 degree ~ 160 degree.
Before not adding ultrasonic voltage signal driver, the friction-driven piece 10 of two elliptical vibration MODAL TRANSFORMATION OF A device front ends contacts with mover simultaneously.
During work, one of them ultrasonic vibration transducer suspends, the work of another one ultrasonic vibration transducer.Be namely: to the ultrasonic vibration transducer electrode sheet that needs suspend, send into the negative DC voltage signal, 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 mover.The ultrasonic vibration transducer that need drive work to another one is sent into ultrasonic sinusoidal electric signals, 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 the continuous linear motion.
During to another direction rectilinear motion, the ultrasonic electric signal driver mode of two ultrasonic vibration transducers of exchange gets final product when the needs mover.Compare the bi-directional drive linear ultrasonic motor of existing Introduction of Literatures, this linear ultrasonic motor has that power capacity is large, energy conversion efficiency is high, simple in structure, 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, 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 a road ultrasonic electric signal excitation respectively.
The present invention has adopted mechanical oscillation MODAL TRANSFORMATION OF A mechanism the extensional vibration of ultrasonic vibration 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, manufacture, 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 invention equal Zhi Xu No. mono-control circuits of ultrasonic vibration transducer and ultrasonic electric signal 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.
The 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 explanation: 1. bolt, 2. back shroud, 3. piezoelectric ceramic piece, 4. electrode slice, 5. front shroud, 6. ring flange, 7. elliptical vibration MODAL TRANSFORMATION OF A device, 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, the bi-directional drive linear ultrasonic motor, comprise 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 support 11 fixing two identical ultrasonic vibration transducers, two identical elliptical vibration MODAL TRANSFORMATION OF A devices and two identical friction-driven pieces; Described ultrasonic vibration transducer outline is cylindrical, it comprises bolt 1 and is set in successively back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and the front shroud 5 on bolt 1, on front shroud 5, be provided with and can connect with support 11 ring flange 6 of use, back shroud 2 and front shroud 5 connect back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5 to compress by bolt 1, formed the power conversion part of bi-directional drive linear ultrasonic motor, the ultrasonic electric energy of A ultrasonic- frequency power supply 12 and 13 outputs of B ultrasonic acoustic-electric source has been converted to the ultrasonic vibrational energy of two ultrasonic vibration transducers.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 * 5, the sheet number of piezoelectric ceramic piece 3 is 2.
Described elliptical vibration MODAL TRANSFORMATION OF A device 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 TRANSFORMATION OF A device 7 integral body are the inclined wedge-shaped structure, the former integral body of inclined wedge-shaped structure elliptical vibration MODAL TRANSFORMATION OF A device is cuboid, and the cross section length of side is 15
*15mm, long 40mm, after being cut a part, ultrasonic vibration transducer axis direction one side forms the inclined wedge-shaped structure, form in two sides of inclined wedge-shaped, a cut parallel sided is not in the ultrasonic vibration transducer axis, and the another side that was cut becomes 10 degree angles with the ultrasonic vibration transducer axis.
Described friction-driven piece 10 is by the bonding front end that is arranged on elliptical vibration MODAL TRANSFORMATION OF A device 7, and friction-driven piece 10 contacts with the frictional layer 9 on draw runner 8.Two ultrasonic vibration transducers are linked together by the ring flange 6 of support 11 and ultrasonic vibration transducer, and support 11 is used for fixing stator and the precompression device is installed, stator is connected to formation bi-directional drive linear ultrasonic motor in aggregates with mover, between two ultrasonic vibration transducer axis after ring flange 6 and support 11 is fixing, angle is 90 degree.
Two ultrasonic vibration transducer natural frequencys of bi-directional drive linear ultrasonic motor are all 25.32KHz mutually, impedance is respectively 75 and 78 ohm, dynamic electric resistor is 17 and 15 ohm, two ultrasonic vibration transducers need a road ultrasonic electric signal 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 driver, the friction-driven piece 10 of two elliptical vibration MODAL TRANSFORMATION OF A device 7 front ends contacts with mover simultaneously.
During driving, to the ultrasonic vibration transducer electrode sheet 4 that needs suspend, send into negative DC voltage signal-300V, 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 7 front ends is suspended on mover; The ultrasonic vibration transducer that need drive work to another one is sent into ultrasonic sinusoidal electric signals, after the ultrasonic electric signal 13 outputs of B ultrasonic acoustic-electric source 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 7 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 7 ends; And drive friction-driven piece 10 and elliptical vibration MODAL TRANSFORMATION OF A device 7 ends are done ultrasonic elliptical vibratory together, and then drive mover and carry out the continuous linear motion.The system after 10 minutes of moving reaches the stable vibration state, and 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 18.6mm/s.
The ultrasonic electric signal driver mode of two ultrasonic vibration transducers of exchange, moving the output voltage of A ultrasonic-frequency power supply 12 after 10 minutes is 240V, and electric current is 1.50A, and mover carries out rectilinear motion to another direction, and its velocity peak values is 18.1mm/s.
Claims (6)
1. the bi-directional drive linear ultrasonic motor, comprise mover and stator, it is characterized in that: mover comprises draw runner and is arranged on the frictional layer on draw runner surface; Two identical ultrasonic vibration transducers, two identical elliptical vibration MODAL TRANSFORMATION OF A devices and two identical friction-driven pieces that stator comprises support, fixes by support; Described ultrasonic vibration transducer outline is cylindrical, it comprises bolt and is set in successively back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt, on front shroud, be provided with and can connect with support the ring flange of use, back shroud and front shroud connect back shroud, piezoelectric ceramic piece, electrode slice and front shroud to compress by bolt; Described elliptical vibration MODAL TRANSFORMATION OF A device is arranged on the front end of front shroud, for the inclined wedge-shaped structure, the former integral body of inclined wedge-shaped structure elliptical vibration MODAL TRANSFORMATION OF A device is cuboid, after being cut a part, ultrasonic vibration transducer axis direction one side forms the inclined wedge-shaped structure, form in two sides of inclined wedge-shaped, a cut parallel sided is not in the ultrasonic vibration transducer axis, and the another side that was cut becomes 3-30 degree angle with the ultrasonic vibration transducer axis; Described friction-driven piece is arranged on the front end of elliptical vibration MODAL TRANSFORMATION OF A device; Between two ultrasonic vibration transducer axis after ring flange and support are fixing, angle is 20 degree ~ 160 degree.
2. 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 of a whole installation at front shroud.
3. bi-directional drive linear ultrasonic motor according to claim 1, is characterized in that: also comprise that connects a double-screw bolt, for elliptical vibration MODAL TRANSFORMATION OF A device being connected in to the front end of front shroud.
4. according to claim 1 and 2 or 3 described bi-directional drive linear ultrasonic motors, 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. according to claim 1 and 2 or 3 described bi-directional drive linear ultrasonic motors, 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.
6. according to claim 1 and 2 or 3 described bi-directional drive linear ultrasonic motors, is characterized in that: also comprise a joint bolt, for the friction-driven piece being connected in to the front end of elliptical vibration MODAL TRANSFORMATION OF A device.
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| CN201310373863.9A CN103401470B (en) | 2013-08-26 | 2013-08-26 | Bi-directional drive linear ultrasonic motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104204A (en) * | 2014-07-01 | 2014-10-15 | 南京航空航天大学 | Vibration energy recovery device having function of self-adaptive control on ultrasound piezoelectric actuation |
| CN104362891A (en) * | 2014-12-09 | 2015-02-18 | 苏州科技学院 | Bi-directional driving linear ultrasonic motor |
| CN104410321A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single-excitation ultrasound elliptic-vibration multi-vibrator material conveying device |
| CN104410325A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single-excitation rotating ultrasonic motor |
| CN104444135A (en) * | 2014-12-09 | 2015-03-25 | 苏州科技学院 | Single excitation ultrasonic elliptic vibration multi-vibrator bidirectional material conveying device |
| 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 |
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| CN101071995A (en) * | 2007-06-14 | 2007-11-14 | 南京航空航天大学 | Dual-driving foot longitudinal-vibration mode stacked linear ultrasonic motor and working mode and electric exciting manner |
| CN101404467A (en) * | 2008-07-04 | 2009-04-08 | 南京航空航天大学 | K shaped linear ultrasound motor based on continuous amplitude transforming rod principle |
| CN103227584A (en) * | 2013-05-08 | 2013-07-31 | 苏州科技学院 | Bidirectional driving linear ultrasonic motor |
| CN203457073U (en) * | 2013-08-26 | 2014-02-26 | 苏州科技学院 | Bidirectionally driven linear ultrasonic motor |
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- 2013-08-26 CN CN201310373863.9A patent/CN103401470B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101071995A (en) * | 2007-06-14 | 2007-11-14 | 南京航空航天大学 | Dual-driving foot longitudinal-vibration mode stacked linear ultrasonic motor and working mode and electric exciting manner |
| CN101404467A (en) * | 2008-07-04 | 2009-04-08 | 南京航空航天大学 | K shaped linear ultrasound motor based on continuous amplitude transforming rod principle |
| CN103227584A (en) * | 2013-05-08 | 2013-07-31 | 苏州科技学院 | Bidirectional driving linear ultrasonic motor |
| CN203457073U (en) * | 2013-08-26 | 2014-02-26 | 苏州科技学院 | Bidirectionally driven linear ultrasonic motor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104204A (en) * | 2014-07-01 | 2014-10-15 | 南京航空航天大学 | Vibration energy recovery device having function of self-adaptive control on ultrasound piezoelectric actuation |
| CN104362891A (en) * | 2014-12-09 | 2015-02-18 | 苏州科技学院 | Bi-directional driving linear ultrasonic motor |
| CN104410321A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single-excitation ultrasound elliptic-vibration multi-vibrator material conveying device |
| CN104410325A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single-excitation rotating ultrasonic motor |
| CN104444135A (en) * | 2014-12-09 | 2015-03-25 | 苏州科技学院 | Single excitation ultrasonic elliptic vibration multi-vibrator bidirectional material conveying device |
| 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 |
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Inventor after: Yin Zhen Inventor after: Wang Zhongwang Inventor after: Zhu Qixin Inventor after: Wang Bangfu Inventor after: Cao Ziyang Inventor after: Liu Yisheng Inventor after: Wu Yongzhi Inventor after: Li Huan Inventor after: Zhang Lei Inventor after: Ding Wenyu Inventor before: Yin Zhen Inventor before: Liu Jiao Inventor before: Li Hua Inventor before: Li Yan Inventor before: Cao Ziyang Inventor before: Liu Yisheng Inventor before: Wu Yongzhi Inventor before: Chen Yurong Inventor before: Ren Kun Inventor before: Lv Ziqiang |
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