CN203406802U - Single electric signal driving bidirectional rotary ultrasonic motor - Google Patents
Single electric signal driving bidirectional rotary ultrasonic motor Download PDFInfo
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- CN203406802U CN203406802U CN201320520876.XU CN201320520876U CN203406802U CN 203406802 U CN203406802 U CN 203406802U CN 201320520876 U CN201320520876 U CN 201320520876U CN 203406802 U CN203406802 U CN 203406802U
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- electric machine
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Abstract
The utility model discloses a single electric signal driving bidirectional rotary ultrasonic motor. The single electric signal driving bidirectional rotary ultrasonic motor comprises two same stators, a rotor and a set of positive pressure pre-tightening force adjusting mechanism. Each stator comprises a mandrel, and a back cover plate, piezoelectric ceramic pieces, electrode slices and an elliptical vibration mode converter which are sleeved on the mandrel orderly, the stator comprises a friction disc and a bearing, and the positive pressure pre-tightening force adjusting mechanism comprises a spring and a supporting mechanism. The single electric signal driving bidirectional rotary ultrasonic motor of the utility model realizes the elliptical orbit motion of the mass points on the end faces of the driving teeth of the stators, by utilizing the specially designed elliptical vibration mode converter and by the longitudinal vibration of the piezoelectric ceramic pieces. The two stators drive the rotor to rotate separately and continuously when working separately. The single electric signal driving bidirectional rotary ultrasonic motor of the utility model has the advantages of being simple in structure, low in cost and small in control difficulty, being easy to manufacture, miniaturize and integrate, etc., and is wide in application prospect.
Description
Technical field
The utility model relates to the ultrasound electric machine field that utilizes piezoelectric ceramic inverse piezoelectric effect, especially relates to a kind of single-electrical signal and drives 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, 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 exist certain phase difference and frequency close between these two mode of oscillations, on stator and rotor contact interface, the end face particle of stator will produce 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 of sandwich piezoelectric vibrator generation is converted to driving gear particle elliptical vibration, and then the ultrasound electric machine that drives rotor to rotate, 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, the specification requirement of 60 degree that are difficult to guarantee to misplace between adjacent piezoelectric ceramic piece; In addition, be not with any positioner between this motor stator and rotor, this is affected stator and rotor contact position precision between the two, 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 existing in existing Ultrasonic Motor Techniques, the purpose of this utility model is to provide a kind of novel single-electrical signal to drive bidirectional rotation ultrasound electric machine.
Single-electrical signal drives 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 in 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 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 inclined wedge-shaped structure, form in two sides of inclined wedge-shaped, the projection radially of a cut side is not parallel to ultrasound electric machine axis, the another side being cut projection radially becomes 3-40 degree angle with ultrasound electric machine axis, described driving gear quantity is 3-12.
The object that makes driving gear form 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 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 elliptical vibration track at the end of inclined wedge-shaped structure driving gear, 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; 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.
Two described 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 malleation pretightning force.
Further, described elliptical vibration MODAL TRANSFORMATION OF A device driving gear end is bonded with A friction material.
Further, two end faces that contact with driving gear on described frictional disk are bonded with B friction material.
Further, described back shroud and described axle are made into split-type structural or integral structure.
Further, the utility model only needs road ultrasonic-frequency power supply output signal and a control circuit, when needs rotor rotates to a direction, the signal of telecommunication of ultrasonic-frequency power supply output is linked into the electrode slice of corresponding stator, if need rotor to rotate to another direction, by change over switch, the signal of telecommunication of this ultrasonic-frequency power supply output is linked into the electrode slice of another one stator.
Stator of the present utility model utilizes the elliptical vibration mode converter structure of particular design, the elliptical orbit that extensional vibration by piezoelectric ceramic piece has realized elliptical vibration mode converter driving gear end face particle moves, when two stators carry out work respectively, can drive rotor to carry out shake double-direction turning movement.The utlity model has simple in structure, the advantage such as power capacity is large, easy to manufacture, and assembly difficulty is low; The utility model 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; The utlity model has simultaneously 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.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is elliptical vibration MODAL TRANSFORMATION OF A device three-dimensional structure schematic diagram of the present utility model (without ring flange figure).
Fig. 3 is application example schematic diagram of the present utility model.
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 utility model drives 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 in 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, driving gear part is in the uniform upper end that is arranged on barrel portion of circumferencial direction, each driving gear is radially 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 inclined wedge-shaped structure, form in two sides of inclined wedge-shaped, the projection radially of a cut side is not parallel to ultrasound electric machine axis, the another side being cut projection radially becomes 24 degree angles with ultrasound electric machine axis, driving gear small end width is 1.5mm, be highly 7.5mm, described driving gear quantity is 6, driving gear end is bonded with A friction material 7.
Frictional disk 9 and bearing 10 form the rotor portion of ultrasound electric machine, and frictional disk 9 and bearing 10 are set in axle 1 after connecting by interference fits, and two end faces that contact with driving gear on frictional disk 9 are all bonded with B friction material 8;
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, drive increment all towards frictional disk 9, also to contact with frictional disk 9, one of them stator is fixed by ring flange 5, another stator is connected with spring 11 one end by ring flange 5, supporting construction 12 is connected in spring 11 other ends, between two stators and rotor, form malleation pretightning force, by regulating the position of 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 automatic frequency tracking function in designated frequency range.
Shown in Fig. 3, during operation, single-electrical signal drives the electrode slice 4 of a stator of bidirectional rotation ultrasound electric machine to access after the signal of telecommunication of ultrasonic-frequency power supplies 13 outputs, inverse piezoelectric effect due to piezoelectric ceramic piece 3, piezoelectric ceramic piece 3 will produce 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 to carry out longitudinal ultrasonic vibration, when ultrasonic vibrational energy is delivered to from stator elliptical vibration MODAL TRANSFORMATION OF A device 6 driving gear ends, be converted to extensional vibration and the compound vertical curved composite ultrasonic elliptical vibratory of flexural vibrations with certain phase difference, 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 drive rotor to be rotated, 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 needs rotor rotates to a direction, by change over switch, the signal of telecommunication of these ultrasonic-frequency power supply 13 outputs is linked into the electrode slice 4 of another one stator, 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 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 be set in successively back shroud, piezoelectric ceramic piece, electrode slice, the elliptical vibration MODAL TRANSFORMATION OF A device in axle, 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 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 inclined wedge-shaped structure, form in two sides of inclined wedge-shaped, the projection radially of a cut side is not parallel to ultrasound electric machine axis, the another side being cut projection radially becomes 3-40 degree angle with ultrasound electric machine axis, rotor comprises frictional disk and bearing, malleation prefastening force adjustment mechanism comprises spring and supporting construction, two described 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 connects by ring flange and spring and supporting construction, between two stators and rotor, forms malleation pretightning force.
2. single-electrical signal according to claim 1 drives 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 bidirectional rotation ultrasound electric machine, it is characterized in that: described back shroud and described axle are made into split-type structural or integral structure.
4. according to the single-electrical signal described in claim 1 or 2 or 3, drive bidirectional rotation ultrasound electric machine, it is characterized in that: described elliptical vibration MODAL TRANSFORMATION OF A device driving gear end is bonded with A friction material.
5. according to the single-electrical signal described in claim 1 or 2 or 3, drive bidirectional rotation ultrasound electric machine, it is characterized in that: two end faces that contact with driving gear on described frictional disk are bonded with B friction material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520876.XU CN203406802U (en) | 2013-08-26 | 2013-08-26 | Single electric signal driving bidirectional rotary ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520876.XU CN203406802U (en) | 2013-08-26 | 2013-08-26 | Single electric signal driving bidirectional rotary ultrasonic motor |
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| Publication Number | Publication Date |
|---|---|
| CN203406802U true CN203406802U (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320520876.XU Expired - Fee Related CN203406802U (en) | 2013-08-26 | 2013-08-26 | Single electric signal driving bidirectional rotary ultrasonic motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414374A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-electric-signal driving bidirectional rotating ultrasonic motor |
| CN104410326A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single electric signal driven bilateral rotating ultrasonic motor |
| CN109787509A (en) * | 2019-03-30 | 2019-05-21 | 西华大学 | A kind of bimorph transducer traveling-wave ultrasonic micro machine with high q-factor piezoelectricity |
-
2013
- 2013-08-26 CN CN201320520876.XU patent/CN203406802U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414374A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-electric-signal driving bidirectional rotating ultrasonic motor |
| CN103414374B (en) * | 2013-08-26 | 2016-06-15 | 苏州科技学院 | Single-electrical signal drives two-way rotary ultrasonic motor |
| CN104410326A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single electric signal driven bilateral rotating ultrasonic motor |
| CN109787509A (en) * | 2019-03-30 | 2019-05-21 | 西华大学 | A kind of bimorph transducer traveling-wave ultrasonic micro machine with high q-factor piezoelectricity |
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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: 20140122 Termination date: 20160826 |