CN103414374A - Single-electric-signal driving bidirectional rotating ultrasonic motor - Google Patents
Single-electric-signal driving bidirectional rotating ultrasonic motor Download PDFInfo
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- CN103414374A CN103414374A CN2013103738982A CN201310373898A CN103414374A CN 103414374 A CN103414374 A CN 103414374A CN 2013103738982 A CN2013103738982 A CN 2013103738982A CN 201310373898 A CN201310373898 A CN 201310373898A CN 103414374 A CN103414374 A CN 103414374A
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Abstract
The invention discloses a single-electric-signal driving bidirectional rotating ultrasonic motor. The single-electric-signal driving bidirectional rotating ultrasonic motor comprises two same stators, a rotor and a set of positive-pressure prestressing force adjusting mechanism. Each stator comprises a mandrel, a rear cover plate, a piezoelectric ceramic piece, an electrode plate and an elliptic vibration mode converter, wherein the mandrel is sequentially sleeved with the rear cover plate, the piezoelectric ceramic piece, the electrode plate and the elliptical vibration mode converter. The rotor comprises a friction plate and a bearing. The positive-pressure prestressing force adjusting mechanism comprises a spring and a supporting structure. Through the structure of the elliptic vibration mode converter with the special design, the elliptic track motion of mass points on a driving tooth end face of each stator is achieved through longitudinal vibration of the piezoelectric ceramic pieces, and the rotor is driven by one of the stators to continuously rotate when the two stators work individually. The single-electric-signal driving bidirectional rotating ultrasonic motor has the advantages of being simple in structure, easy to manufacture, prone to microminiaturization and integration, low in cost, low in control difficulty and wide in application prospect.
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 single-electrical signal and drive the bidirectional rotation ultrasound electric machine.
Background technology
Rotary 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 rotor, the macroscopic view that elastomeric micro breadth oscillation is converted to rotor rotatablely moves, and directly drives load.The problems such as in existing rotary-type ultrasound electric machine, the ubiquity driving moment is little at present, and axially volume wearing and tearing difference in internal-and external diameter contact zone large, rotor is large, functional reliability is low.
Single-electrical signal driven-mode conversion hysteria ultrasound electric machine is also a kind of of ultrasound electric machine, and it is the driving that utilizes one group of piezo ceramic element, and the MODAL TRANSFORMATION OF A device by special construction makes stator produce the complex vibration with 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.
At publication number, be CN101860259A, denomination of invention is in the patent documentation of " single-electrical signal-stimulated rotation ultrasonic motor ", disclosing a kind of utilization utilizes window shape dislocation MODAL TRANSFORMATION OF A device that the extensional vibration that the sandwich piezoelectric vibrator produces is converted to driving gear particle elliptical vibration, and then the ultrasound electric machine of driving rotor rotation, this invention control-driven system is simple, assembling easily, but its window shape dislocation MODAL TRANSFORMATION OF A device manufacture difficulty is larger, production cost is higher, and it can only carry out single direction rotation, these problems have restricted its promotion and application in industrial production.
At publication number, be CN101030740A, denomination of invention is in the patent documentation of " bending-rotation ultrasonic motor of single-phase driving ", the structure that discloses a kind of body is the single-phase driving standing wave rotary ultrasonic motor of taper, this motor relies on six piezoelectric ceramic pieces that are 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 its complex structure, and the screw (revolving force) because of clamp nut in the compaction process of piezoelectric ceramic piece very easily causes between piezoelectric ceramic piece and misplaces, be difficult to guarantee the specification requirement of dislocation 60 degree between adjacent piezoelectric ceramic piece; In addition, between this motor stator and rotor, be not with any positioner, this makes stator and rotor contact position precision between the two be affected, and then affects the stability of motor torque and speed; There is complex structure in this type of rotary ultrasonic motor, manufacture to install more difficultly, and cost is higher, the problems such as poor stability of motor torque and speed.
Summary of the invention
For overcoming the deficiency existed in existing Ultrasonic Motor Techniques, the object of the present invention is to provide a kind of novel single-electrical signal to drive the bidirectional rotation ultrasound electric machine.
Single-electrical signal drives the bidirectional rotation ultrasound electric machine, comprise two identical stators, a rotor and a set of malleation prefastening force adjustment mechanism, stator comprises axle and is set in successively back shroud, piezoelectric ceramic piece, electrode slice, the elliptical vibration MODAL TRANSFORMATION OF A device on axle, and axle and elliptical vibration MODAL TRANSFORMATION OF A device are fixed back shroud, piezoelectric ceramic piece, electrode slice and elliptical vibration MODAL TRANSFORMATION OF A device after by thread connection.Stationary part is also the power conversion part of ultrasound electric machine simultaneously, the ultrasonic electric energy of ultrasonic-frequency power supply output is converted to the ultrasonic vibrational energy of stationary part.
Described elliptical vibration MODAL TRANSFORMATION OF A device is integrated, comprise the barrel portion of lower end and the driving gear part of upper end, on the barrel portion of lower end, be provided with and can connect with external structure the ring flange of use, the driving gear part of upper end is in the uniform upper end that is arranged on barrel portion of circumferencial direction, each driving gear is radially the inclined wedge-shaped structure, the former overall structure of this inclined wedge-shaped radially be projected as rectangle, after being cut a part, ultrasound electric machine axis direction one side forms the inclined wedge-shaped structure, namely form in two sides of inclined wedge-shaped, cut side projection radially is not parallel to the ultrasound electric machine axis, the another side be cut projection radially becomes 3-40 degree angle with the ultrasound electric machine axis, described driving gear quantity is 3-12.
The purpose that makes driving gear form the inclined wedge-shaped structure is in order to change the mode of oscillation of elliptical vibration MODAL TRANSFORMATION OF A device, its extensional vibration model frequency and flexural vibration mode frequency are approached or equate, existence due to the inclined wedge-shaped structure, the longitudinal ultrasonic vibration that the power conversion of ultrasound electric machine partly produces is after being delivered to inclined wedge-shaped driving gear end, at inclined wedge-shaped structure driving gear end, be 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 vibration track at the end of inclined wedge-shaped structure driving gear, namely be converted to elliptical vibration MODAL TRANSFORMATION OF A device driving gear end along the tangential vertical curved composite ultrasonic elliptical vibratory of ultrasound electric machine circumference.
Rotor comprises frictional disk and bearing, and bearing is arranged on frictional disk inside; The malleation prefastening force adjustment mechanism comprises spring and supporting construction, and the ring flange of spring one end and a stator is fixed, and the other end and supporting construction are fixed.
Described two stators coaxially arrange, and on stator, the driving increment of elliptical vibration MODAL TRANSFORMATION OF A device all also contacts with frictional disk towards frictional disk, one of them stator is fixed by ring flange, another stator is connected with spring one end by ring flange, supporting construction is connected in the spring other end, by regulating the position of supporting construction, between two stators and rotor, form the malleation pretightning force.
Further, described elliptical vibration MODAL TRANSFORMATION OF A device driving gear end is bonded with the A friction material.
Further, on described frictional disk, be bonded with the B friction material with contacted two end faces of driving gear.
Further, described back shroud and described axle are made into split-type structural or integral structure.
Further, the present invention only needs road ultrasonic-frequency power supply output signal and a control circuit, when the needs rotor rotates to a direction, the electrode slice that the signal of telecommunication of ultrasonic-frequency power supply output is linked into to corresponding stator gets final product, if need rotor to rotate to another direction, by change over switch, the electrode slice that the signal of telecommunication of this ultrasonic-frequency power supply output is linked into the another one stator is got final product.
Stator of the present invention utilizes the elliptical vibration mode converter structure of particular design, by the extensional vibration of piezoelectric ceramic piece, realized the elliptical orbit motion of elliptical vibration mode converter driving gear end face particle, when two stators carry out work respectively, can drive rotor and carry out shake double-direction turning movement.The advantages such as the present invention has simple in structure, and power capacity is large, easy to manufacture, and assembly difficulty is low; The present invention only needs one group of control circuit and driving power thereof in addition, and control-driven system is simple, easy to manufacture, controls difficulty little, and reliability is high; Simultaneously the present invention have volume little, lightweight, be easy to microminiaturization, integrated, cost is low, 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, have a extensive future.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is elliptical vibration MODAL TRANSFORMATION OF A device three-dimensional structure schematic diagram of the present invention (can't bluely coil and scheme).
Fig. 3 is application example schematic diagram of the present invention.
Number in the figure explanation: 1. axle, 2. back shroud, 3. piezoelectric ceramic piece, 4. electrode slice, 5. ring flange, 6. elliptical vibration MODAL TRANSFORMATION OF A device, 7.A friction material, 8. B friction material, 9. frictional disk, 10. bearing, 11. springs, 12. supporting constructions, 13. ultrasonic-frequency power supplies
Embodiment
Shown in Fig. 1,2, single-electrical signal of the present invention drives the bidirectional rotation ultrasound electric machine, comprise two identical stators, a rotor and a set of malleation prefastening force adjustment mechanism, stator comprises axle 1 and is set in successively back shroud 2, piezoelectric ceramic piece 3, electrode slice 4, the elliptical vibration MODAL TRANSFORMATION OF A device 6 on axle 1, axle 1 and elliptical vibration MODAL TRANSFORMATION OF A device 6 are by after thread connection being fixed back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and elliptical vibration MODAL TRANSFORMATION OF A device 6, and described back shroud 2 and described axle 1 are split-type structural.
Elliptical vibration MODAL TRANSFORMATION OF A device 6 is integrated, comprise the barrel portion of lower end and the driving gear part of upper end, the driving gear part is in the uniform upper end that is arranged on barrel portion of circumferencial direction, each driving gear is radially the inclined wedge-shaped structure, the former overall structure of this inclined wedge-shaped radially be projected as rectangle, after being cut a part, ultrasound electric machine axis direction one side forms the inclined wedge-shaped structure, namely form in two sides of inclined wedge-shaped, cut side projection radially is not parallel to the ultrasound electric machine axis, the another side be cut projection radially becomes 24 degree angles with the ultrasound electric machine axis, driving gear small end width is 1.5mm, be highly 7.5mm, described driving gear quantity is 6, the driving gear end is bonded with A friction material 7.
The malleation prefastening force adjustment mechanism of ultrasound electric machine rotor and two stators comprises spring 11 and supporting construction 12, two stators coaxially arrange, driving increment all also contacts with frictional disk 9 towards frictional disk 9, one of them stator is fixed by ring flange 5, another stator is connected with spring 11 1 ends by ring flange 5, supporting construction 12 is connected in spring 11 other ends, between two stators and rotor, form the malleation pretightning force, by the position of regulating supporting construction 12, can change the decrement of spring 11, thereby regulate the precompression of ultrasound electric machine stator to rotor, precompression is set as 8N.
Single-electrical signal drives bidirectional rotation ultrasound electric machine external diameter 10mm, length 45mm, and piezoelectric ceramic used is PZT-8, is of a size of
Ф 10 * Ф 5 * 2mmThe natural frequency of two stators is 95.4KHz, impedance is respectively 94 and 92 ohm, dynamic electric resistor is 21 and 20 ohm, ultrasonic-frequency power supply 13 output voltage ranges are 0-400V, current range is 0-4A, and output frequency is 95.4 ± 0.01KHz, and ultrasonic-frequency power supply 13 has the automatic frequency tracking function in designated frequency range.
In conjunction with shown in Figure 3, during operation, after the signal of telecommunication of electrode slice 4 access ultrasonic-frequency power supplies 13 outputs of a stator of single-electrical signal driving bidirectional rotation ultrasound electric machine, inverse piezoelectric effect due to piezoelectric ceramic piece 3, piezoelectric ceramic piece 3 will produce the longitudinal ultrasonic vibration, the electric energy that is about to ultrasonic-frequency power supply 13 outputs is converted to ultrasonic vibrational energy, and drive whole stator and carry out the longitudinal ultrasonic vibration, when ultrasonic vibrational energy, be delivered to elliptical vibration MODAL TRANSFORMATION OF A device 6 driving gear ends from stator after, 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 elliptical vibration MODAL TRANSFORMATION OF A device 6 driving gear ends along the tangential vertical curved composite ultrasonic elliptical vibratory of ultrasound electric machine circumference, driving gear end and frictional disk 9 contact, and then the driving rotor is rotated motion, after ultrasound electric machine moves 30 minutes continuously, ultrasonic-frequency power supply 13 output voltages are 100V, electric current is 0.23A, rotary speed of rotator is 466r/min, running status is good.
When the needs rotor rotates to a direction, by change over switch, the electrode slice 4 that the signal of telecommunication of these ultrasonic-frequency power supply 13 outputs is linked into the another one stator is got final product, after another stator moves 30 minutes continuously, ultrasonic-frequency power supply 13 output voltages are 100V, electric current is 0.24A, rotary speed of rotator is 471r/min, and running status is also good.
Claims (5)
1. single-electrical signal drives the bidirectional rotation ultrasound electric machine, comprise two identical stators, a rotor and a set of malleation prefastening force adjustment mechanism, it is characterized in that: stator comprises axle and is set in successively back shroud, piezoelectric ceramic piece, electrode slice, the elliptical vibration MODAL TRANSFORMATION OF A device on axle, and axle and elliptical vibration MODAL TRANSFORMATION OF A device are fixed back shroud, piezoelectric ceramic piece, electrode slice and elliptical vibration MODAL TRANSFORMATION OF A device after by thread connection, described elliptical vibration MODAL TRANSFORMATION OF A device is integrated, comprise the barrel portion of lower end and the driving gear part of upper end, on the barrel portion of lower end, be provided with and can connect with external structure the ring flange of use, the driving gear part of upper end is in the uniform upper end that is arranged on barrel portion of circumferencial direction, each driving gear is radially the inclined wedge-shaped structure, the former overall structure of this inclined wedge-shaped radially be projected as rectangle, after being cut a part, ultrasound electric machine axis direction one side forms the inclined wedge-shaped structure, namely form in two sides of inclined wedge-shaped, cut side projection radially is not parallel to the ultrasound electric machine axis, the another side be cut projection radially becomes 3-40 degree angle with the ultrasound electric machine axis, rotor comprises frictional disk and bearing, the malleation prefastening force adjustment mechanism comprises spring and supporting construction, described two stators coaxially arrange, and on stator, the driving increment of elliptical vibration MODAL TRANSFORMATION OF A device all also contacts with frictional disk towards frictional disk, one of them stator is fixedly installed by ring flange, another stator, by ring flange and spring and supporting construction connection, forms the malleation pretightning force between two stators and rotor.
2. single-electrical signal according to claim 1 drives the bidirectional rotation ultrasound electric machine, it is characterized in that: on described each elliptical vibration MODAL TRANSFORMATION OF A device, the quantity of driving gear is 3-12.
3. single-electrical signal according to claim 1 drives the bidirectional rotation ultrasound electric machine, and it is characterized in that: described back shroud and described axle are made into split-type structural or integral structure.
4. according to claim 1 or 2 or 3 described single-electrical signals, drive the bidirectional rotation ultrasound electric machine, it is characterized in that: described elliptical vibration MODAL TRANSFORMATION OF A device driving gear end is bonded with the A friction material.
5. according to claim 1 or 2 or 3 described single-electrical signals, drive the bidirectional rotation ultrasound electric machine, it is characterized in that: with contacted two end faces of driving gear, be bonded with the B friction material on described frictional disk.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310373898.2A CN103414374B (en) | 2013-08-26 | 2013-08-26 | Single-electrical signal drives two-way rotary ultrasonic motor |
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| CN201310373898.2A CN103414374B (en) | 2013-08-26 | 2013-08-26 | Single-electrical signal drives two-way rotary ultrasonic motor |
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| CN103414374A true CN103414374A (en) | 2013-11-27 |
| CN103414374B CN103414374B (en) | 2016-06-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410326A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single electric signal driven bilateral rotating ultrasonic motor |
| CN111701832A (en) * | 2020-06-22 | 2020-09-25 | 陕西师范大学 | Giant magnetostrictive rod-shaped elliptical composite vibration transducer and transduction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100194242A1 (en) * | 2009-02-03 | 2010-08-05 | Samsung Electronics Co., Ltd. | Piezoelectric ultrasonic motor and method of manufacturing the same |
| CN101860259A (en) * | 2010-05-21 | 2010-10-13 | 苏州科技学院 | Single-electrical signal-stimulated rotation ultrasonic motor |
| CN103199734A (en) * | 2013-05-08 | 2013-07-10 | 苏州科技学院 | Two-way rotary ultrasonic motor driven by single electrical signals |
| CN203406802U (en) * | 2013-08-26 | 2014-01-22 | 苏州科技学院 | Single electric signal driving bidirectional rotary ultrasonic motor |
-
2013
- 2013-08-26 CN CN201310373898.2A patent/CN103414374B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100194242A1 (en) * | 2009-02-03 | 2010-08-05 | Samsung Electronics Co., Ltd. | Piezoelectric ultrasonic motor and method of manufacturing the same |
| CN101860259A (en) * | 2010-05-21 | 2010-10-13 | 苏州科技学院 | Single-electrical signal-stimulated rotation ultrasonic motor |
| CN103199734A (en) * | 2013-05-08 | 2013-07-10 | 苏州科技学院 | Two-way rotary ultrasonic motor driven by single electrical signals |
| CN203406802U (en) * | 2013-08-26 | 2014-01-22 | 苏州科技学院 | Single electric signal driving bidirectional rotary ultrasonic motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410326A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single electric signal driven bilateral rotating ultrasonic motor |
| CN111701832A (en) * | 2020-06-22 | 2020-09-25 | 陕西师范大学 | Giant magnetostrictive rod-shaped elliptical composite vibration transducer and transduction method |
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| CN103414374B (en) | 2016-06-15 |
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Inventor after: Qian Mi Inventor after: Zhu Zhanjun Inventor after: Zhu Qixin Inventor after: Bo Jie Inventor after: Wang Shuwen Inventor after: Wang Guangxun Inventor after: Wang Bangfu Inventor after: Yin Zhen Inventor after: Yang Xinming Inventor after: Zhang Lei Inventor before: Yin Zhen Inventor before: Liu Jiao Inventor before: Li Hua Inventor before: Cao Ziyang Inventor before: Li Yan Inventor before: Xie Ou Inventor before: Wang Bangfu Inventor before: Liu Yisheng Inventor before: Wu Yongzhi Inventor before: Lv Ziqiang |
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