CN1111939C - Linear ultrasonic motor and its driving oscillator - Google Patents
Linear ultrasonic motor and its driving oscillator Download PDFInfo
- Publication number
- CN1111939C CN1111939C CN 98111286 CN98111286A CN1111939C CN 1111939 C CN1111939 C CN 1111939C CN 98111286 CN98111286 CN 98111286 CN 98111286 A CN98111286 A CN 98111286A CN 1111939 C CN1111939 C CN 1111939C
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- Prior art keywords
- vibrator
- guide rail
- drive vibrator
- protecgulum
- base plate
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- Expired - Fee Related
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- 239000000919 ceramic Substances 0.000 claims abstract description 17
- 238000002604 ultrasonography Methods 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000000806 elastomer Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005284 excitation Effects 0.000 abstract 2
- 230000002457 bidirectional effect Effects 0.000 abstract 1
- 239000007767 bonding agent Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002783 friction material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The present invention relates to a motor by using piezoelectric effect. The present invention puts forward a driving vibrator and an ultrasonic motor designed according to the driving vibrator compounded with a sandwich columnar vibrator and a tabular vibrator; a driving vibrator (6) is perpendicular to a guide rail (10); the piezoelectric element of the driving vibrator adopts a piezoelectric ceramic piece; the driving vibrator has the columnar vibrator for longitudinal excitation and the tabular vibrator for transversal excitation. The present invention has the advantages of simple structure and low cost; large thrust force and self-lock force for power cut can be obtained; large travel and bidirectional movement can be realized.
Description
The present invention relates to utilize the motor of piezoelectric effect.
Linear type ultrasound motor is a kind ofly to be directly changed into the New-type electric machine of rectilinear motion mechanical energy by electric energy, has direct driving, controlled good, noiseless, advantage such as nonmagnetic, is particularly suitable for small-sized, accurate linear motion device.It forms drive vibrator jointly by piezoelectric element and elastomer, utilizes piezoelectric element to motivate elastomeric ultrasonic frequency domain resonance, drives the moving body moving linearly by frictional force then.Therefore, be suitable for practical product and should have big thrust output, the while is simple in structure, volume is little.In the present existing linear type ultrasound motor, when adopting piezoelectric element (as direct stickup piezoelectric ceramic piece) simple in structure to make volume hour, then the little defective of ubiquity thrust output (is generally 0.4～4N); If thrust output is reached more than the 10N, then to adopt baroque piezoelectric element such as laminated piezoelectric actuator, but there is the problem difficult, that cost is high of making in this actuator, perhaps adopt common sandwich oscillator to produce vibration at the two ends of spring beam, but this structure make overall volume too huge and efficient is very low.
The object of the present invention is to provide the linear type ultrasound motor and the drive vibrator thereof of a kind of simple in structure and thrust output big (reaching more than the 10N).
Its piezoelectric element of the drive vibrator that the present invention proposes adopts piezoelectric ceramic piece, elastomer is divided into protecgulum and bonnet, and the front portion of protecgulum is that tabular, rear portion are column, and bonnet is a column, clamping piezoelectric ceramic piece between the rear portion of protecgulum and the bonnet, the piezoelectric ceramic piece of fitting on the front panel face of protecgulum.
The linear type ultrasound motor that the present invention proposes is made up of parts such as above-mentioned drive vibrator and guide rails, drive vibrator is located by clamper, the guide rail below is provided with base plate, combine as a whole by fastening connecting rod between clamper and the base plate, drive vibrator is placed perpendicular to guide rail, and the front end face of protecgulum is contacted with the last plane of guide rail, the precompression adjusting mechanism is set on the fastening connecting rod, between base plate and the guide rail lm guides is set, the vertically-guided plate also is set between clamper and the base plate.
Drive vibrator is the core component of ultrasound electric machine.Drive vibrator proposed by the invention is the complex of a kind of sandwich column oscillator and tabular oscillator, it combines the extensional vibration mode of column oscillator with the transverse bending vibration mode of tabular oscillator, with the exciting (be vertical exciting) of extensional vibration mode work, make to be parallel to the exciting (being horizontal exciting) of guide pass direction with transverse bending vibration mode perpendicular to the guide pass direction.Sandwich column oscillator constitutes by clamping piezoelectric ceramic piece 3 between the protecgulum 4 of column and bonnet 2, by securing member or bonding agent the three combined as a whole, and be good to adopt securing member, securing member 1 can place the centre or the periphery of column oscillator; Cylindrical cross-section can be circular, square or other shape, and the shape of piezoelectric ceramic piece can adapt with cylindrical cross-section.The front portion of protecgulum is made into tabular, applying piezoelectric ceramic piece 5 just constitutes tabular oscillator on its plane, and the mode of applying can adopt bonding agent or securing member, is good to adopt bonding agent.Tabular oscillator is the amplitude transformer of double as column oscillator also, makes the vibrational energy of column oscillator more concentrated, vibration force is bigger.Protecgulum and bonnet all can adopt metal or ceramic making, and piezoelectric ceramic piece should adopt emission type.The size design of drive vibrator each several part should make extensional vibration reach consistent with the resonance frequency of transverse vibration.
When above-mentioned drive vibrator is constituted ultrasound electric machine, pass through clamper, base plate makes with fastening connecting rod etc. that drive vibrator is vertical to be placed on the guide rail, that is: clamper 8 links to each other with drive vibrator 6 by securing member 14,11 belows that place guide rail 10 of base plate, can relatively move along guide rail, fastening connecting rod 7 is associated in clamper with base plate, and the front end face that makes the drive vibrator protecgulum contacts with the last plane of guide rail and the plate face perpendicular to guide rail upper surface and with the transverse cross-section parallel of guide rail, thereby make drive vibrator form the main body of ultrasound electric machine with parts such as guide rails, apply precompression by the precompression adjusting mechanism 13 that is arranged on the fastening connecting rod to drive vibrator, the precompression adjusting mechanism can adopt spring and nut or structures such as spring and snap ring, the lm guides 12 that is provided with between base plate and the guide rail can adopt structures such as directive wheel or gathering sill, make drive vibrator and base plate together along the guide rail moving linearly, one end of vertically-guided plate 9 is stuck in and is precision in the gathering sill of clamper side and is slidingly matched, the other end links to each other with the base plate of clamper by securing member, keeps vertical to guarantee drive vibrator its axis in motion process with guide pass.
Piezoelectric ceramic piece motivates the resonance of longitudinal and transverse two directions under the effect of alternating current, thereby be superimposed as the required elliptic motion of motor-driven in drive vibrator and the contacted position of guide rail, and then make drive vibrator under the effect of frictional force, produce rectilinear motion along guide rail.Because adopting the column oscillator to make vertical exciting, tabular oscillator makes horizontal exciting and is one with both are compound, also do not adopt the piezoelectric element of special construction or specific (special) requirements, therefore, drive vibrator of the present invention and ultrasound electric machine thereof are simple in structure, volume is little, cost is low; Simultaneously owing to adopt the compound drive vibrator of sandwich, its vibration generation power is big on the one hand, can apply big precompression to drive vibrator, thereby obtain big thrust output, can also obtain the big power that cuts off self-lock, its vibration displacement is big on the other hand, has reduced the requirement to the guide rail surface precision, so can realize big stroke; In addition, because drive vibrator of the present invention is symmetrical structure and arranges perpendicular to guide rail, therefore can also realize bidirectional-movement, promptly positive and negative two switch flexibly the performance unanimity to motion.
The structural representation of accompanying drawing 1. drive vibrator of the present invention.
The vertical view of accompanying drawing 2. accompanying drawings 1.
The structural representation of accompanying drawing 3. ultrasound electric machines of the present invention.
The vertical view of accompanying drawing 4. accompanying drawings 3.
From accompanying drawing as can be seen, embodiments of the invention have adopted cylindrical sandwich column oscillator, external diameter is 20mm, the thickness of tabular oscillator is 4mm, the drive vibrator total length is 100mm, used piezoelectric ceramic piece is PZT-4, and size respectively is φ 20 * Φ 5 * 2mm and 20 * 5 * 1mm, the piezoelectric ceramic piece on the column oscillator with before, adopt fastening bolt to connect between the bonnet, piezoelectric ceramic piece on the tabular oscillator adopts epoxy resin to paste, rail length (being motor range) is 500mm, and the fastening connecting rod between clamper and the base plate is 4, all establishes the precompression adjusting mechanism that is made of spring and nut on the every connecting rod, that precompression is set is 80N, directive wheel also is 4, to guarantee the stable of motion state, does not use friction material on the drive surface of guide rail, driving frequency is 23kHz, test result shows that the thrust output of motor reaches 11N, and the power of cutting off self-lock is 20N, power output reaches 1.4W, stable, heat radiation is good, two to motion switch flexibly and output characteristic consistent.If used friction material on drive surface, then effect will be better.
Claims (2)
1, a kind of drive vibrator of linear type ultrasound motor, comprise piezoelectric element and elastomer, it is characterized in that piezoelectric element adopts two piezoelectric ceramic pieces, elastomer is divided into protecgulum and bonnet, the front portion of protecgulum (4) is that tabular, rear portion are column, bonnet (2) is a column, clamping piezoelectric ceramic piece (3) between the rear portion of protecgulum and the bonnet, another piezoelectric ceramic piece (5) of fitting on the front panel face of protecgulum
2, a kind of linear type ultrasound motor, comprise drive vibrator and guide rail, the structure that it is characterized in that described drive vibrator (6) according to claim 1, drive vibrator is by clamper (8) location, the below of described guide rail (10) is provided with base plate (11), combine as a whole by fastening connecting rod (7) between clamper and the base plate, drive vibrator is contacted with the last plane of guide rail perpendicular to the front end face of guide rail placement and protecgulum, precompression adjusting mechanism (13) is set on the fastening connecting rod, lm guides (12) is set between base plate and the guide rail, vertically-guided plate (9) also is set between clamper and the base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98111286 CN1111939C (en) | 1998-05-07 | 1998-05-07 | Linear ultrasonic motor and its driving oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98111286 CN1111939C (en) | 1998-05-07 | 1998-05-07 | Linear ultrasonic motor and its driving oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1235404A CN1235404A (en) | 1999-11-17 |
| CN1111939C true CN1111939C (en) | 2003-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98111286 Expired - Fee Related CN1111939C (en) | 1998-05-07 | 1998-05-07 | Linear ultrasonic motor and its driving oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1111939C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100525058C (en) * | 2006-03-09 | 2009-08-05 | 南京航空航天大学 | Multi-freedom ring stator supersonic dynamo |
| CN102142790A (en) * | 2011-04-14 | 2011-08-03 | 天津大学 | Method for exciting rotary ultrasonic motor |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317816C (en) * | 2003-11-04 | 2007-05-23 | 上海大学 | Ultra-fine bidirectional driving type linear micromotor |
| CN100403647C (en) * | 2005-01-10 | 2008-07-16 | 南京航空航天大学 | Small linear ultrasonic motor |
| CN101001054B (en) * | 2006-12-26 | 2011-06-22 | 华南农业大学 | Double-cylinder vibrator linear ultrasonic motor |
| CN102904480A (en) * | 2012-11-05 | 2013-01-30 | 哈尔滨工业大学 | Sandwich type square frame ultrasonic motor vibrator |
| CN104578899B (en) * | 2015-02-05 | 2017-01-11 | 哈尔滨工业大学 | Patch-type circular ring double-pin ultrasonic motor vibrator |
| CN104729776B (en) * | 2015-03-24 | 2017-03-01 | 西安交通大学 | piezoelectric actuator thrust force measuring device and measuring method |
| CN114060452B (en) * | 2021-12-06 | 2023-07-21 | 哈尔滨工业大学 | Active and passive hybrid vibration isolator based on piezoelectric actuation |
-
1998
- 1998-05-07 CN CN 98111286 patent/CN1111939C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100525058C (en) * | 2006-03-09 | 2009-08-05 | 南京航空航天大学 | Multi-freedom ring stator supersonic dynamo |
| CN102142790A (en) * | 2011-04-14 | 2011-08-03 | 天津大学 | Method for exciting rotary ultrasonic motor |
| CN102142790B (en) * | 2011-04-14 | 2013-11-06 | 天津大学 | Method for exciting rotary ultrasonic motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1235404A (en) | 1999-11-17 |
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