CN203225674U - Single-excitation linear ultrasonic motor - Google Patents
Single-excitation linear ultrasonic motor Download PDFInfo
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- CN203225674U CN203225674U CN 201320241877 CN201320241877U CN203225674U CN 203225674 U CN203225674 U CN 203225674U CN 201320241877 CN201320241877 CN 201320241877 CN 201320241877 U CN201320241877 U CN 201320241877U CN 203225674 U CN203225674 U CN 203225674U
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- ultrasonic motor
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- elliptical vibration
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Abstract
The utility model discloses a single-excitation linear ultrasonic motor. A rotor comprises a slide bar and a frictional layer arranged on the surface of the slide bar; a stator comprises an ultrasonic vibration transducer, an oval vibration mode converter and a frictional driving block arranged at the front end of the oval vibration mode converter; the ultrasonic vibration transducer comprises a bolt and a rear cover plate, a piezoelectric ceramic piece, an electrode slice and a front cover plate sleeved on the bolt in sequence, and the front cover plate and the bolt are connected through threads; the oval vibration mode converter is arranged at the front end of the front cover plate, the overall oval vibration mode converter is cylinder-shaped, upper and lower sides are provided with three rectangular gaps which are in staggered distribution, the converter can convert longitudinal ultrasonic vibration generated by the ultrasonic vibration transducer into oval vibration of the tail end of the oval vibration mode converter and the frictional driving block, and the rotor is driven to perform continuous linear motion.
Description
Technical field
The utility model relates to the ultrasound electric machine field that utilizes the 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 use the eighties in 20th century, be to utilize the inverse piezoelectric effect of piezoelectric to realize the mechanical-electric coupling device that electric energy-mechanical energy is changed, by the rubbing action between stator and the mover, the macroscopical straight line (rotation) that elastomeric micro breadth oscillation is converted to mover moves, and directly promotes load.Because of advantages such as it has that volume is little, in light weight, low-speed big, noise are little, response is fast, positioning accuracy is high, no electromagnetic interference and environmental suitability are strong, obtained increasingly extensive application in technical fields such as medical treatment, Aero-Space, robot, MEMS.
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 exist certain phase difference and frequency close between these two mode of oscillations, the end face particle of stator will produce the elliptical orbit vibration on stator and the rotor contact interface, thereby obtains motion and the moment of torsion of rotor by the friction between stator and the 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 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 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] successively, based on the K shape linear ultrasonic motor patents such as [200810124426.2] of continuous amplitude transformer principle.But existing linear ultrasonic motor exists complex structure, power output is little, manufacturing is difficult, to deficiency such as make 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 purpose is the deficiency that exists in the above-mentioned linear ultrasonic motor in order to overcome.
A kind of single excitation linear ultrasonic motor comprises stator and mover, and 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; The ultrasonic vibration transducer comprises that bolt reaches back shroud, piezoelectric ceramic piece, electrode slice and the front shroud that is set in successively on the bolt, front shroud and bolt are fixed back shroud, piezoelectric ceramic piece, electrode slice and front shroud by thread connection, constituted 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 the front end that an integral body is arranged on front shroud, perhaps utilize an additional connection double-screw bolt elliptical vibration MODAL TRANSFORMATION OF A device to be connected in the front end of front shroud, elliptical vibration MODAL TRANSFORMATION OF A device integral body is cylindrical, it offers three rectangular indentation that are dislocatedly distributed in both sides up and down, the purpose that rectangular indentation is set is in order to change the mode of oscillation of ultrasonic vibration transducer, make its extensional vibration model frequency and flexural vibration mode frequency approaching or equal, the longitudinal ultrasonic that the ultrasonic vibration transducer is produced vibrates the vertical composite ultrasonic elliptical vibratory of bending that is converted to elliptical vibration MODAL TRANSFORMATION OF A device end.Described friction-driven piece is arranged on the front end of elliptical vibration MODAL TRANSFORMATION OF A device by welding or bonding way, and the friction-driven piece contacts with frictional layer on the draw runner.The ring flange of ultrasonic vibration transducer is used for installing stator and precompression device, and stator is connected 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.
After the ultrasonic signal of telecommunication of ultrasonic-frequency power supply output is linked into the electrode slice of ultrasonic vibration transducer, the 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 continuous rectilinear motion.Compare single excitation linear ultrasonic motor that existing document is introduced, this linear ultrasonic motor has that power capacity is big, energy conversion efficiency is high, simple in structure, easy to manufacture, advantage such as cost is low, the rigidity of structure is big, control-driven system is simple and vibration performance is stable.
Further, described single excitation linear ultrasonic motor has only one group of extensional vibration piezoelectric ceramic piece.
Further, described single excitation linear ultrasonic motor only needs one road ultrasonic signal of telecommunication 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, manufacturing, 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 No. one control circuit and the ultrasonic signal of telecommunication to encourage in addition, the 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.
Description of drawings
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. elliptical vibration MODAL TRANSFORMATION OF A device, 7. rectangular indentation, 8. draw runner, 9. frictional layer, 10 friction-driven pieces, 11. ultrasonic-frequency power supplies
Embodiment
In conjunction with shown in Figure 1, a kind of 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 6 and friction-driven piece 10; The ultrasonic vibration transducer comprises that bolt 1 reaches back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and the front shroud 5 that is set in successively on the bolt 1, and front shroud 5 and bolt 1 are fixed back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5 by thread connection.This list excitation linear ultrasonic motor has only 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 is 2.
Described elliptical vibration MODAL TRANSFORMATION OF A device 6 and front shroud 5 are made into the front end that an integral body is arranged on front shroud 5, elliptical vibration MODAL TRANSFORMATION OF A device 6 integral body are cylindrical, diameter 15mm, both sides offer three rectangular indentation that are dislocatedly distributed 7 up and down, three rectangular indentation 7 width are 6mm, and the degree of depth is 3mm, and the distance of the centre-to-centre spacing front end face of three rectangular indentation 7 is respectively 15mm, 25mm, 35mm.Described friction-driven piece 10 is by the bonding front end that is arranged on elliptical vibration MODAL TRANSFORMATION OF A device 6, and friction-driven piece 10 contacts with frictional layer 9 on the draw runner 8.Utilize the ring flange of ultrasonic vibration transducer that stator and precompression device are installed, stator is connected the angle that constitutes the ultrasonic vibration transducer axis of single excitation linear ultrasonic motor after ring flange is fixing and draw runner in aggregates with mover be 45 to spend.
This list excitation linear ultrasonic motor stator natural frequency is 25.32KHz, impedance is 86 ohm, dynamic electric resistor is 17 ohm, only need one road ultrasonic signal of telecommunication 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 the automatic frequency tracking function in designated frequency range.
In conjunction with shown in Figure 2, after the ultrasonic signal of telecommunication of ultrasonic-frequency power supply output is linked into the electrode slice 4 of ultrasonic vibration transducer, the ultrasonic vibration transducer namely produces ultrasonic vibration, after ultrasonic vibrational energy is delivered to elliptical vibration MODAL TRANSFORMATION OF A device 6 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 6 ends; And drive friction-driven piece 10 and elliptical vibration MODAL TRANSFORMATION OF A device 6 ends are done ultrasonic elliptical vibratory together.Move that system reaches the stable vibration state after 10 minutes, the output voltage of ultrasonic-frequency power supply 11 is 240V, and electric current is 1.45A, when the friction-driven piece with after mover contacts, drive mover and carry out continuous rectilinear motion, velocity peak values is 16.5mm/s.
Claims (5)
1. a single excitation linear ultrasonic motor comprises mover and stator, and mover comprises draw runner and is arranged on the frictional layer on draw runner surface; It is characterized in that: described stator comprises ultrasonic vibration transducer, elliptical vibration MODAL TRANSFORMATION OF A device and friction-driven piece; The ultrasonic vibration transducer comprises that bolt reaches back shroud, piezoelectric ceramic piece, electrode slice and the front shroud that is set in successively on the bolt, and front shroud and bolt are fixed back shroud, piezoelectric ceramic piece, electrode slice and front shroud by thread connection; Described elliptical vibration MODAL TRANSFORMATION OF A device is arranged on the front end of front shroud, its integral body is cylindrical, both sides offer three rectangular indentation that are dislocatedly distributed up and down, described friction-driven piece is arranged on the front end of elliptical vibration MODAL TRANSFORMATION OF A device, and the ultrasonic vibration transducer axis after ring flange is fixing and the angle of draw runner are 20 degree ~ 160 degree.
2. a kind of list according to claim 1 encourages linear ultrasonic motor, and it is characterized in that: described elliptical vibration MODAL TRANSFORMATION OF A device and front shroud are made into the front end that an integral body is arranged on front shroud.
3. a kind of single excitation linear ultrasonic motor according to claim 1 is characterized in that: comprise that also one connects double-screw bolt, is used for elliptical vibration MODAL TRANSFORMATION OF A device is connected in the front end of front shroud.
4. a kind of list according to claim 1 encourages linear ultrasonic motor, and 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. a kind of list according to claim 1 encourages linear ultrasonic motor, and 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320241877 CN203225674U (en) | 2013-05-08 | 2013-05-08 | Single-excitation linear ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320241877 CN203225674U (en) | 2013-05-08 | 2013-05-08 | Single-excitation linear ultrasonic motor |
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| Publication Number | Publication Date |
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| CN203225674U true CN203225674U (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320241877 Expired - Fee Related CN203225674U (en) | 2013-05-08 | 2013-05-08 | Single-excitation linear ultrasonic motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199731A (en) * | 2013-05-08 | 2013-07-10 | 苏州科技学院 | Single-incentive linear ultrasonic motor |
| CN107930503A (en) * | 2018-01-05 | 2018-04-20 | 苏州科技大学 | A kind of rotatable ultrasonic water disturbs device |
-
2013
- 2013-05-08 CN CN 201320241877 patent/CN203225674U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199731A (en) * | 2013-05-08 | 2013-07-10 | 苏州科技学院 | Single-incentive linear ultrasonic motor |
| CN103199731B (en) * | 2013-05-08 | 2015-09-02 | 苏州科技学院 | One singly encourages linear ultrasonic motor |
| CN107930503A (en) * | 2018-01-05 | 2018-04-20 | 苏州科技大学 | A kind of rotatable ultrasonic water disturbs device |
| CN107930503B (en) * | 2018-01-05 | 2023-08-11 | 苏州科技大学 | Rotatable ultrasonic wave water scrambler |
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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: 20131002 Termination date: 20160508 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |