CN203406797U - Single excitation linear ultrasonic motor - Google Patents
Single excitation linear ultrasonic motor Download PDFInfo
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- CN203406797U CN203406797U CN201320520878.9U CN201320520878U CN203406797U CN 203406797 U CN203406797 U CN 203406797U CN 201320520878 U CN201320520878 U CN 201320520878U CN 203406797 U CN203406797 U CN 203406797U
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- elliptical vibration
- modal transformation
- single excitation
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Abstract
The utility model discloses a single excitation linear ultrasonic motor. The single excitation linear ultrasonic motor is characterized in that an active cell comprises a draw slip and a frictional layer arranged on the surface of the draw slip, 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 ultrasonic vibration energy transducer comprises a bolt, and a back cover plate, a piezoelectric ceramic sheet, an electrode slice and a front cover plate which are sleeved on the bolt orderly, and the back cover plate and the front cover plate connect and compress the back cover plate, the piezoelectric ceramic sheet, the electrode slice and the front cover plate via the bolt; 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 active cell to carry out continuous and linear 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 excitation 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 promote 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 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.The ultrasound electric machine that utilizes 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 colleges and universities such as the research and development Hen Kuai， Tsing-Hua University of current domestic linear ultrasonic motor, Nanjing Aero-Space University, Harbin Institute of Technology have successively launched research to linear ultrasonic motor.Since two thousand four, Chinese patent net has been published annular standing wave linear ultrasonic motor [200510046044.9], prism longitudinal bend composite vibrator linear supersonic motor [200610132316.1], triangle bended plate type piezoelectric straight line ultrasound electric motor [200710045921.X], H shape standing wave linear ultrasonic motor oscillator [200820014739.8], column structure dual-wheel foot driving linear ultrasonic motor and electric excitation method thereof [200710020963.8], the patents such as K shape linear ultrasonic motor [200810124426.2] based on continuous amplitude transformer principle successively.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 utility model provides a kind of novel single excitation linear ultrasonic motor, and object is the deficiency existing in above-mentioned linear ultrasonic motor in order to overcome.
Single excitation linear ultrasonic motor, comprises stator and mover, and described mover comprises draw runner and is arranged on the frictional layer on draw runner surface; Described 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 excitation linear 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 draw runner.The ring flange of ultrasonic vibration transducer is used for installing stator and precompression device, stator is connected to the single excitation of formation in aggregates linear ultrasonic motor with mover, and the ultrasonic vibration transducer axis after ring flange is fixing and the angle of draw runner 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 mover to carry out continuous linear motion.Compare single excitation 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, described single excitation linear ultrasonic motor only has one group of extensional vibration piezoelectric ceramic piece.
Further, described single excitation linear 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 excitation linear ultrasonic motor, greatly reduce the complexity of vibrational system, manufacture, assembly difficulty and production cost have been reduced, whole single excitation linear 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. draw runner, 9. frictional layer, 10 friction-driven pieces, 11. ultrasonic-frequency power supplies
Embodiment
Shown in Fig. 1,2, single excitation linear ultrasonic motor, comprises stator and mover, and mover comprises draw runner 8 and is bonded in the frictional layer 9 on draw runner 8 surfaces; Stator comprises ultrasonic vibration transducer, elliptical vibration MODAL TRANSFORMATION OF A device 7 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 excitation linear 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 excitation linear 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.
Inclined wedge-shaped structure elliptical vibration MODAL TRANSFORMATION OF A device 7 former integral body are 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 draw runner 8.Utilize the ring flange of ultrasonic vibration transducer that stator and precompression device are installed, stator is connected to the single excitation of formation in aggregates linear ultrasonic motor with mover, the ultrasonic vibration transducer axis after ring flange is fixing and the angle of draw runner are 45 degree.
Single excitation linear 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.The system after 10 minutes of moving reaches stable vibration state, and the output voltage of ultrasonic-frequency power supply 11 is 240V, and electric current is 1.45A, after friction-driven piece contacts with mover, drives mover to carry out continuous linear motion, and velocity peak values is 16.5mm/s.
Claims (6)
1. single excitation linear ultrasonic motor, comprises mover and stator, it is characterized in that: mover comprises draw runner and is arranged on the frictional layer on draw runner surface; 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 draw runner are 20 degree ~ 160 degree.
2. single excitation linear 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 excitation 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 the single excitation linear 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 excitation linear 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 excitation linear 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 |
|---|---|---|---|
| CN201320520878.9U CN203406797U (en) | 2013-08-26 | 2013-08-26 | Single excitation linear ultrasonic motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520878.9U CN203406797U (en) | 2013-08-26 | 2013-08-26 | Single excitation linear ultrasonic motor |
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| CN203406797U true CN203406797U (en) | 2014-01-22 |
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| CN201320520878.9U Expired - Fee Related CN203406797U (en) | 2013-08-26 | 2013-08-26 | Single excitation linear ultrasonic motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414370A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-incentive linear ultrasonic motor |
| CN113395014A (en) * | 2021-06-02 | 2021-09-14 | 温州大学 | Miniature high-rotation-speed hollow ultrasonic motor |
| US20220069739A1 (en) * | 2020-08-31 | 2022-03-03 | Canon Kabushiki Kaisha | Vibration type actuator, rotationally driving apparatus, and image pickup apparatus |
-
2013
- 2013-08-26 CN CN201320520878.9U patent/CN203406797U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414370A (en) * | 2013-08-26 | 2013-11-27 | 苏州科技学院 | Single-incentive linear ultrasonic motor |
| CN103414370B (en) * | 2013-08-26 | 2015-09-02 | 苏州科技学院 | Singly encourage linear ultrasonic motor |
| US20220069739A1 (en) * | 2020-08-31 | 2022-03-03 | Canon Kabushiki Kaisha | Vibration type actuator, rotationally driving apparatus, and image pickup apparatus |
| GB2599489A (en) * | 2020-08-31 | 2022-04-06 | Canon Kk | Vibration type actuator, rotationally driving apparatus, and image pickup apparatus |
| US11502624B2 (en) * | 2020-08-31 | 2022-11-15 | Canon Kabushiki Kaisha | Vibration type actuator, rotationally driving apparatus, and image pickup apparatus |
| GB2599489B (en) * | 2020-08-31 | 2024-05-15 | Canon Kk | Vibration type actuator, rotationally driving apparatus, and image pickup apparatus |
| CN113395014A (en) * | 2021-06-02 | 2021-09-14 | 温州大学 | Miniature high-rotation-speed hollow 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20160826 |