CN203406800U - Single excitation rotary ultrasonic motor - Google Patents
Single excitation rotary ultrasonic motor Download PDFInfo
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- CN203406800U CN203406800U CN201320520868.5U CN201320520868U CN203406800U CN 203406800 U CN203406800 U CN 203406800U CN 201320520868 U CN201320520868 U CN 201320520868U CN 203406800 U CN203406800 U CN 203406800U
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- modal transformation
- elliptical vibration
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- ultrasonic motor
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Abstract
The utility model discloses a single excitation rotary ultrasonic motor. The single excitation rotary ultrasonic motor is characterized in that a rotor comprises a turntable and a frictional layer arranged on the surface of the turntable, and a stator comprises an ultrasonic vibration energy transducer, an elliptical vibration mode converter and a friction driving block arranged at the front end of the elliptical vibration mode converter; the elliptical vibration mode converter is arranged at the front end of the ultrasonic vibration energy transducer, is an inclined wedge structure, can transform the longitudinal ultrasonic vibration generated by the ultrasonic vibration energy transducer into the longitudinal-flexural composite ultrasonic elliptical vibration at the tail end of the elliptical vibration mode converter and the friction driving block, and drives the rotor to carry out continuous and rotary motion.
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 stimulated rotation ultrasonic motor.
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 promotes 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.
The problems such as in existing rotary-type ultrasound electric machine, mainly the flexural vibration mode outside employing face is combined into the capable ripple of end face at present, and drives rotor to rotate, and ubiquity driving moment is little, and axial volume is large, the internal-and external diameter contact zone wearing and tearing difference of rotor is large; In addition, even if adopted in plane vibration mode, in order to apply the radial tightening power in face, the disk of oscillator or rotor or annulus are made two semi-discs or semicircular ring, middle by spring, be connected into disk or annulus to apply the radial tightening power in face, also be difficult at present realize large torque, and functional reliability is low.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 six piezoelectric ceramic pieces of motor are by 60 installations of will mutually staggering of polarization subregion, 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; Thereby this type of rotary ultrasonic motor exists complex structure, high to the contact position required precision between stator and rotor, manufacture is installed more difficult, the defects such as poor stability of motor torque and speed.
Summary of the invention
The utility model provides a kind of novel single stimulated rotation ultrasonic motor, and object is the deficiency existing in above-mentioned rotary ultrasonic motor in order to overcome.
Single stimulated rotation ultrasonic motor, comprises stator and rotor, and rotor comprises rotating disk and is arranged on the frictional layer of disc surfaces; Stator comprises ultrasonic vibration transducer, elliptical vibration MODAL TRANSFORMATION OF A device and friction-driven piece; 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 other constructional device the ring flange of use, back shroud and front shroud are connected back shroud, piezoelectric ceramic piece, electrode slice and front shroud to compress by bolt, formed the power conversion part of single stimulated rotation ultrasonic motor, the ultrasonic electric energy of ultrasonic-frequency power supply output 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 a whole installation at the front end of front shroud, or 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 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 inclined wedge-shaped structure, form in two sides of inclined wedge-shaped, a cut parallel sided is not in ultrasonic vibration transducer axis, the another side being cut becomes 3-30 degree angle with ultrasonic vibration transducer axis.
The object that makes elliptical vibration MODAL TRANSFORMATION OF A device form 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 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 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, friction-driven piece contacts with the frictional layer on rotating disk.The ring flange of ultrasonic vibration transducer is used for installing stator and precompression device, stator is connected to the single stimulated rotation ultrasonic motor of formation in aggregates with rotor, and the ultrasonic vibration transducer axis after ring flange is fixing and the angle of plane of rotor disc are 20 degree ~ 160 degree.
The ultrasonic electric signal of exporting when ultrasonic-frequency power supply is linked into after the electrode slice of ultrasonic vibration transducer, ultrasonic vibration transducer produces ultrasonic vibration, ultrasonic vibrational energy is from ultrasonic vibration transducer is delivered to elliptical vibration MODAL TRANSFORMATION OF A device end, be converted to extensional vibration and the compound vertical curved composite ultrasonic elliptical vibratory of flexural vibrations with certain phase difference, be converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration MODAL TRANSFORMATION OF A device end; And drive friction-driven piece to do ultrasonic elliptical vibratory together with elliptical vibration MODAL TRANSFORMATION OF A device end, and then drive rotor to carry out continuous rotation motion.Compare single stimulated rotation ultrasonic motor of existing Introduction of Literatures, this rotary 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, described single stimulated rotation ultrasonic motor only has one group of extensional vibration piezoelectric ceramic piece.
Further, described single stimulated rotation ultrasonic motor Zhi Xu mono-road ultrasonic electric signal excitation.
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 single stimulated rotation ultrasonic motor, greatly reduce the complexity of vibrational system, manufacture, assembly difficulty and production cost have been reduced, whole single stimulated rotation ultrasonic motor is simple in structure, easy to manufacture, is conducive to the realization of microminiaturized target; This utility model only needs a road control circuit and ultrasonic electric signal to encourage in addition, control difficulty is low, avoided two-phase or multiphase 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.
Accompanying drawing explanation
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. ring flange, 7. elliptical vibration MODAL TRANSFORMATION OF A device, 8. rotating disk, 9. frictional layer, 10 friction-driven pieces, 11. ultrasonic-frequency power supplies
Embodiment
Shown in Fig. 1,2, single stimulated rotation ultrasonic motor, comprises stator and rotor, and rotor comprises rotating disk 8 and is bonded in the frictional layer 9 on rotating disk 8 surfaces; Stator comprises ultrasonic vibration transducer, elliptical vibration MODAL TRANSFORMATION OF A device 6 and friction-driven piece 10; 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 the ring flange 6 that can connect with other constructional device use, back shroud 2 and front shroud 5 are connected 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 single stimulated rotation ultrasonic motor, the ultrasonic electric energy of ultrasonic-frequency power supply 11 outputs has been converted to the ultrasonic vibrational energy of ultrasonic vibration transducer.This list stimulated rotation ultrasonic motor only has one group of extensional vibration piezoelectric ceramic piece 3, piezoelectric ceramic transducer section diameter 30mm, and the material of piezoelectric ceramic piece 3 is PZT-8, is of a size of:
Ф 30mm * Ф 15mm * 5mm, the sheet number of piezoelectric ceramic piece 3 is 2.
Elliptical vibration MODAL 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, and elliptical vibration MODAL TRANSFORMATION OF A device 7 integral body are inclined wedge-shaped structure, and 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 inclined wedge-shaped structure, form in two sides of inclined wedge-shaped, a cut parallel sided is not in ultrasonic vibration transducer axis, and the another side being cut becomes 10 degree angles with ultrasonic vibration transducer axis.
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 rotating disk 8.Utilize the ring flange of ultrasonic vibration transducer that stator and precompression device are installed, stator is connected to the single stimulated rotation ultrasonic motor of formation in aggregates with rotor, the ultrasonic vibration transducer axis after ring flange is fixing and the angle of rotating disk 8 planes are 45 degree.
This list stimulated rotation ultrasonic motor stator natural frequency is 25.32KHz, impedance is 86 ohm, dynamic electric resistor is 17 ohm, Zhi Xu mono-road ultrasonic electric signal excitation, ultrasonic-frequency power supply 11 output voltage ranges are 0-400V, current range is 0-4A, and output frequency is 25.32 ± 0.01KHz, and ultrasonic-frequency power supply 11 has automatic frequency tracking function in designated frequency range.
The ultrasonic electric signal of exporting when ultrasonic-frequency power supply is linked into after the electrode slice 4 of ultrasonic vibration transducer, ultrasonic vibration transducer produces ultrasonic vibration, ultrasonic vibrational energy is from ultrasonic vibration transducer is delivered to elliptical vibration MODAL TRANSFORMATION OF A device 7 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 the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration MODAL TRANSFORMATION OF A device 7 ends; And drive friction-driven piece 10 to do ultrasonic elliptical vibratory together with elliptical vibration MODAL TRANSFORMATION OF A device 7 ends, and then drive rotor to carry out continuous rotation motion.The system after 10 minutes of moving reaches steady-working state, and the output voltage of ultrasonic-frequency power supply 11 is 240V, and electric current is 1.45A, and the edge peripheral linear speed peak value of the rotating disk 8 that diameter is 40mm is 56.2mm/s.
Claims (6)
1. single stimulated rotation ultrasonic motor, comprises rotor and stator, it is characterized in that: rotor comprises rotating disk and is arranged on the frictional layer of disc surfaces; Stator comprises ultrasonic vibration transducer, elliptical vibration MODAL TRANSFORMATION OF A device and friction-driven piece; 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 other constructional device the ring flange of use, back shroud and front shroud are connected 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 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 inclined wedge-shaped structure, form in two sides of inclined wedge-shaped, a cut parallel sided is not in ultrasonic vibration transducer axis, and the another side being cut becomes 3-30 degree angle with ultrasonic vibration transducer axis; Described friction-driven piece is arranged on the front end of elliptical vibration MODAL TRANSFORMATION OF A device; Ultrasonic vibration transducer axis after ring flange is fixing and the angle of plane of rotor disc are 20 degree ~ 160 degree.
2. single stimulated rotation ultrasonic motor according to claim 1, is characterized in that: described elliptical vibration MODAL TRANSFORMATION OF A device and front shroud are made into a whole installation at the front end of front shroud.
3. single stimulated rotation 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 the single stimulated rotation ultrasonic motor described in claim 1 or 2 or 3, 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 the single stimulated rotation ultrasonic motor described in claim 1 or 2 or 3, 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 the single stimulated rotation ultrasonic motor described in claim 1 or 2 or 3, it is characterized in that: also comprise a joint bolt, for friction-driven piece being connected in to the front end of elliptical vibration MODAL TRANSFORMATION OF A device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520868.5U CN203406800U (en) | 2013-08-26 | 2013-08-26 | Single excitation rotary ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520868.5U CN203406800U (en) | 2013-08-26 | 2013-08-26 | Single excitation rotary ultrasonic motor |
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| Publication Number | Publication Date |
|---|---|
| CN203406800U true CN203406800U (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320520868.5U Expired - Fee Related CN203406800U (en) | 2013-08-26 | 2013-08-26 | Single excitation rotary ultrasonic motor |
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| CN (1) | CN203406800U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414373A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-incentive rotating ultrasonic motor |
| CN104410325A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single-excitation rotating ultrasonic motor |
-
2013
- 2013-08-26 CN CN201320520868.5U patent/CN203406800U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414373A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-incentive rotating ultrasonic motor |
| CN103414373B (en) * | 2013-08-26 | 2015-09-02 | 苏州科技学院 | Single stimulated rotation ultrasonic motor |
| CN104410325A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single-excitation rotating ultrasonic motor |
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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 |
Granted publication date: 20140122 Termination date: 20160826 |
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| CF01 | Termination of patent right due to non-payment of annual fee |