CN202997968U - Oval paraboloid-shaped linear ultrasonic electromotor - Google Patents
Oval paraboloid-shaped linear ultrasonic electromotor Download PDFInfo
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- CN202997968U CN202997968U CN 201220576032 CN201220576032U CN202997968U CN 202997968 U CN202997968 U CN 202997968U CN 201220576032 CN201220576032 CN 201220576032 CN 201220576032 U CN201220576032 U CN 201220576032U CN 202997968 U CN202997968 U CN 202997968U
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- langevin
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- linear ultrasonic
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- 239000000919 ceramic Substances 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims description 49
- 230000033001 locomotion Effects 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000000806 elastomer Substances 0.000 claims description 9
- 230000012447 hatching Effects 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000012634 fragment Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
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- 238000005086 pumping Methods 0.000 description 1
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Abstract
The utility model relates to an oval paraboloid-shaped linear ultrasonic electromotor and belongs to the ultrasonic electromotor technology field. The oval paraboloid-shaped linear ultrasonic electromotor comprises a stator (1) and a cylindrical-structured mover (2), wherein the stator (1) is formed by connecting n(n>=3) combined oscillators in parallel, each combined oscillator is formed by intersecting two Langevin oscillators at a certain angle, a driving foot (13) of each combined oscillator is formed by integrating head parts of two Langevin oscillators, and each Langevin oscillator consists of an elastic body (11) and piezoelectric ceramic sheets (12). The oval paraboloid-shaped linear ultrasonic electromotor is high in energy density; the stator is made by using multiple Langevin oscillators, and therefore the space utilization rate of the electromotor can be improved; and multiple combined oscillators are activated to work, and therefore the whole electromotor is enabled to be great in output force.
Description
Technical field
The utility model relates to a kind of paraboloid shape linear ultrasonic motor, belongs to the Ultrasonic Motor Techniques field.
Background technology
Linear ultrasonic motor is a kind of novel electrical micro-machine that develops rapidly and use the eighties in 20th century, it utilizes inverse piezoelectric effect and the elastomeric ultrasonic vibration of piezoelectric element, and 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.It has compact conformation, low-speed big, response is fast, positioning accuracy is high and the advantage such as Electro Magnetic Compatibility.Have a wide range of applications in Aero-Space, weaponry and accurate driving field.The development of present domestic linear ultrasonic motor is very fast.Online at Chinese patent, multinomial patent about linear ultrasonic motor is arranged.
This wherein, bar structure linear ultrasonic motor receives much concern, this is because the stator of this motor is made of Langevin-type transducer.Langevin-type transducer utilizes longitudinal vibration, and clear and definite node is arranged.It has very high energy transmission efficiency, and is conducive to clamping.Patent [200810124426.2] proposes the K shape linear ultrasonic motor based on continuous amplitude transformer principle, and the stator of this motor has the Langevin-type transducer of 2 symmetries to consist of.Patent [201010556088.7] proposes the flexible clamping technology based on linear ultrasonic motor, it is by flexible circular arc fragment, all piezoelectric vibrators to be coupled together, and oscillator is connected with stiff end with manhole by flexible circular arc fragment, thereby the clamp structure of having simplified.The stator of said motor is only to have two Langevin-type transducers to consist of, and the space availability ratio of its stator is low.
Summary of the invention
The present invention is directed to the deficiency of the problems referred to above, propose a kind of energy density high and utilize a plurality of Langevin-type transducers to build the paraboloid shape linear ultrasonic motor of its stator.
The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of paraboloid shape linear ultrasonic motor, the mover (2) that comprises stator (1) and a column structure, described stator (1) is formed in parallel by the individual composite oscillator of n (n 〉=3), described composite oscillator is connected by flexible supporting element (3), and a described n composite oscillator is placed along circumferential symmetry around mover (2) in the space simultaneously; Described each composite oscillator is made of two angled crossing one another of Langevin-type transducer, and the hatching line of single composite oscillator forms paraboloid around axle, these two Langevin-type transducer heads driving foot (13) of combining as a whole and forming composite oscillator simultaneously, and each Langevin-type transducer is comprised of elastomer (11) and piezoelectric ceramic piece (12), the positive pole of described piezoelectric ceramic piece outwardly, negative pole points to the matrix surface of elastomer (11).
Preferably: described flexible supporting element is two identical cirque structures, described cirque structure comprises circular arc support (31) for fixed stator, apply the flexible hinge (32) of precompression and be used for the fixture (33) of fixing whole motor, and described circular arc support (31), flexible hinge (32), fixture (33) press the order annular connection successively of flexible hinge (32), circular arc support (31), flexible hinge (32), fixture (33); And described stator (1) is arranged between the circular arc support (31) of two cirque structures.
Preferably: the Langevin-type transducer of the same side of described each composite oscillator is one group, and two groups of Langevin-type transducers utilize phase difference to be
Two encourage simultaneously with sinusoidal signals frequently, drive mover and carry out rectilinear motion at its axial direction.
Preferably: described n drives foot circle of formation in the plane take the mover direction of motion as normal direction, and the diameter of described mover is greater than this diameter of a circle.
Preferably: the intersecting angle of two Langevin-type transducers of described each composite oscillator is between 0 °-180 °.
a kind of paraboloid shape linear ultrasonic motor of the present utility model, compared to existing technology, has following beneficial effect: because described stator (1) is formed in parallel by the individual composite oscillator of n (n 〉=3), described composite oscillator is connected by flexible supporting element (3), and a described n composite oscillator is placed along circumferential symmetry around mover (2) in the space simultaneously, described each composite oscillator is made of two angled crossing one another of Langevin-type transducer, and the hatching line of single composite oscillator forms paraboloid around axle, these two Langevin-type transducer heads driving foot (13) of combining as a whole and forming composite oscillator simultaneously, and each Langevin-type transducer is comprised of elastomer (11) and piezoelectric ceramic piece (12), simultaneously because linear ultrasonic motor mainly contains plate structure and two kinds of forms of bar structure, the plate structure linear ultrasonic motor is flat form, simple in structure, can play a role in the specific occasion, bar structure linear ultrasonic motor utilizes Langevin-type transducer can produce large power output and high delivery efficiency, importantly be, Langevin-type transducer has clear and definite longitudinal vibration node, the clamping and the pre-pressure loading that are conducive to motor.This patent proposes to utilize a plurality of Langevin-type transducers design linear ultrasonic motors in conjunction with the characteristics of these two kinds of linear ultrasonic motors.The agent structure of this motor is the Langevin-type transducer of bar structure on the one hand, and its surface structure is paraboloid shape structure on the other hand.So this electric machine structure is simple, have clear and definite adding to hold a little and high efficient.
Operation mode of the present utility model is when two Langevin-type transducers of composite oscillator are done the extensional vibration of homophase, to excite the symmetrical mode of composite oscillator; When two Langevin-type transducers are done anti-phase each other extensional vibration, excite the antisymmetry mode of composite oscillator.Adopt two phase differences to be
Sinusoidal signal encourage simultaneously two Langevin-type transducers of composite oscillator, excite two of composite oscillators with phase differences frequently
Mode of oscillation, make on composite oscillator to drive sufficient particle and do elliptic motion.When machine operation, n composite oscillator adopts identical type of drive (with frequency, homophase), drives mover and moves to same direction.Mover is cylindrical structural, and the place contacts with composite oscillator at the driving foot.N drives foot circle of formation in the plane take the mover direction of motion as normal direction, and the diameter of cylinder type mover is greater than this diameter of a circle.Due to the diameter of cylinder type mover greater than this diameter of a circle, so produce precompression between stator and mover.Owing to there is no special pre-pressure loading structure, the structure of motor is simpler.Said motor is conducive to improve the space availability ratio of motor at the symmetric space distribution stator around mover.Owing to exciting a plurality of composite oscillators to work simultaneously, make whole motor that larger power output be arranged simultaneously.
The utility model proposes the stator that utilizes n composite oscillator to consist of motor, and be paraboloid shape structure in the space.This motor can improve the space availability ratio of stator, increases energy density and the power output of stator.Clamping element owing to adopting with flexible hinge makes and naturally produces precompression between stator and mover, and such structure is saved the pre-pressure loading parts that traditional linear ultrasonic motor has, and the structure of motor becomes simpler.
Description of drawings
Fig. 1 is the structural representation of paraboloid shape linear ultrasonic motor;
Fig. 2 is the structural representation of the flexible supporting element of paraboloid shape linear ultrasonic motor;
Fig. 3 is the structural representation of composite oscillator;
Fig. 4 is polarization and the signal loading schematic diagram of single stator piezoelectric ceramic piece, and Fig. 4 (b) is the k-k cutaway view of Fig. 4 (a);
Fig. 5 is the schematic diagram of paraboloid shape linear ultrasonic motor system works mode.Wherein, Fig. 5 (a) is the schematic diagram of the symmetrical operation mode of stator, the schematic diagram of Fig. 5 (b) stator antisymmetry operation mode;
Wherein: 1. stator, 2. mover, 3. flexible supporting element, 11. elastomers, 12. piezoelectric ceramic pieces, 13. drive foot, 31. circular arc supports, 32. flexible hinges, 33. fixtures.
Embodiment
Accompanying drawing discloses the structural representation of a preferred embodiment of the utility model without limitation, explains the technical solution of the utility model below with reference to accompanying drawing.
Embodiment
a kind of paraboloid shape linear ultrasonic motor of the present embodiment as Figure 1-3, the mover 2 that comprises stator 1 and a column structure, described its mover 2 is a tubular ceramic bar, described stator 1 is formed in parallel by the individual composite oscillator of n (n 〉=3), described composite oscillator is connected by flexible supporting element 3, and a described n composite oscillator is placed along circumferential symmetry around mover 2 in the space simultaneously, described each composite oscillator is made of two angled crossing one another of Langevin-type transducer, and the hatching line of single composite oscillator forms paraboloid around axle, these two Langevin-type transducer heads driving foot 13 of combining as a whole and forming composite oscillator simultaneously, and each Langevin-type transducer is comprised of elastomer 11 and piezoelectric ceramic piece 12, described elastomer 11 is called again the stator matrix, the positive pole of described piezoelectric ceramic piece outwardly, negative pole points to the matrix surface of elastomer 11, n composite oscillator power natural equilibrium to mover, whole stator is by the integrated processing of line cutting mode, assurance realizes clamping and does not disturb again its vibration modal frequency each linear ultrasonic motor, also can make stator to mover, certain precompression be arranged.
Described flexible supporting element is two identical cirque structures, described cirque structure comprises circular arc support 31 for fixed stator, apply the flexible hinge 32 of precompression and be used for the fixture 33 of fixing whole motor, and described circular arc support 31, flexible hinge 32, fixture 33 press the order annular connection successively of flexible hinge 32, circular arc support 31, flexible hinge 32, fixture 33; And described stator 1 is arranged between the circular arc support 31 of two cirque structures.
The Langevin-type transducer of the same side of described each composite oscillator is one group, and two groups of Langevin-type transducers utilize phase difference to be
Two encourage simultaneously with sinusoidal signals frequently, drive mover and carry out rectilinear motion at its axial direction.
Described n drives foot circle of formation in the plane take the mover direction of motion as normal direction, and the diameter of described mover is greater than this diameter of a circle.
The intersecting angle of two Langevin-type transducers of described each composite oscillator is between 0 °-180 °.
This motor does not have the special device that applies precompression, and structure is comparatively simple.Fixture is the clip rectangle gripping member with through hole, will motor be assemblied on external device (ED) by screw afterwards.Overall structure is by integrated the processing of line cutting.
The piezoelectric vibrator of stator is divided into two groups, and namely the piezoelectric vibrator on each composite oscillator top is the A item, and the piezoelectric vibrator of bottom is the B item.Utilize phase difference to be
Two encourage simultaneously two groups of piezoelectric vibrators with sinusoidal signals frequently, thereby excite respectively two mode of oscillations of composite oscillator, these two diaphragm states' superpositions make the particle that drives the foot surface produce elliptic motion, drive mover and carry out rectilinear motion at its axial direction.Be the polarization of piezoelectric ceramic piece and load schematic diagram as Fig. 4.Each composite oscillator is intersected at a certain angle by two Langevin-type transducers and forms, and utilizes phase difference
Same frequency sinusoidal signal encourage simultaneously two piezoelectric vibrators to excite respectively two mode of oscillations of stator, these two diaphragm states' superpositions to make to drive on sufficient end face each particle to produce elliptic motion to promote the motion of mover continuous linear.When pumping signal is opposite, can realize the opposite direction rectilinear motion of mover.N composite oscillator adopts identical type of drive (with frequency, homophase), drives mover and moves to same direction, improved power output and power output, and improved space availability ratio.
Two operation modes of each composite oscillator as shown in Figure 5.Fig. 5 (a) illustrates, two piezoelectric vibrators of composite oscillator are done longitudinal extension vibration in the same way, synthesizes and moves up and down driving the foot place.Fig. 5 (b) illustrates, two piezoelectric vibrators of composite oscillator are done reverse longitudinal extension vibration, synthesizes side-to-side movement driving the foot place.
The above's preferred specific embodiment of described the utility model by reference to the accompanying drawings only is used for illustrating execution mode of the present utility model; rather than as the restriction to aforementioned utility model purpose and claims content and scope; every foundation technical spirit of the present utility model all still belongs to the utility model technology and rights protection category to any simple modification made for any of the above embodiments, equivalent variations and modification.
Claims (5)
1. paraboloid shape linear ultrasonic motor, the mover (2) that comprises stator (1) and a column structure, it is characterized in that: described stator (1) is formed in parallel by n composite oscillator, n wherein 〉=3, described composite oscillator is connected by flexible supporting element (3), and a described n composite oscillator is placed along circumferential symmetry around mover (2) in the space simultaneously; Described each composite oscillator is made of two angled crossing one another of Langevin-type transducer, and the hatching line of single composite oscillator forms paraboloid around axle, these two Langevin-type transducer heads driving foot (13) of combining as a whole and forming composite oscillator simultaneously, and each Langevin-type transducer is comprised of elastomer (11) and piezoelectric ceramic piece (12), the positive pole of described piezoelectric ceramic piece outwardly, negative pole points to the matrix surface of elastomer (11).
2. paraboloid shape linear ultrasonic motor according to claim 1, it is characterized in that: described flexible supporting element is two identical cirque structures, described cirque structure comprises the circular arc support (31) for fixed stator, be used for fixed stator and apply the flexible hinge (32) of precompression and be used for the fixture (33) of fixing whole motor, described circular arc support (31), flexible hinge (32), fixture (33) is pressed flexible hinge (32), circular arc support (31), flexible hinge (32), the order of fixture (33) annular successively connects, and described stator (1) is arranged between the circular arc support (31) of two cirque structures.
3. paraboloid shape linear ultrasonic motor according to claim 1, it is characterized in that: the Langevin-type transducer of the same side of described each composite oscillator is one group, two groups of Langevin-type transducers utilize phase difference to be
Two encourage simultaneously with sinusoidal signals frequently, drive mover and carry out rectilinear motion at its axial direction.
4. paraboloid shape linear ultrasonic motor according to claim 1 is characterized in that: described n drives foot form a circle in the plane take the mover direction of motion as normal direction, and the diameter of described mover is greater than this diameter of a circle.
5. paraboloid shape linear ultrasonic motor according to claim 1, it is characterized in that: the intersecting angle of two Langevin-type transducers of described each composite oscillator is between 0 °-180 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576032 CN202997968U (en) | 2012-11-02 | 2012-11-02 | Oval paraboloid-shaped linear ultrasonic electromotor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576032 CN202997968U (en) | 2012-11-02 | 2012-11-02 | Oval paraboloid-shaped linear ultrasonic electromotor |
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| CN202997968U true CN202997968U (en) | 2013-06-12 |
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| CN 201220576032 Expired - Fee Related CN202997968U (en) | 2012-11-02 | 2012-11-02 | Oval paraboloid-shaped linear ultrasonic electromotor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931871A (en) * | 2012-11-02 | 2013-02-13 | 南京航空航天大学 | Paraboloid-shaped linear ultrasonic motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931871A (en) * | 2012-11-02 | 2013-02-13 | 南京航空航天大学 | Paraboloid-shaped linear ultrasonic motor |
| CN102931871B (en) * | 2012-11-02 | 2016-05-04 | 南京航空航天大学 | A kind of paraboloid shape linear ultrasonic motor |
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| 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: 20130612 Termination date: 20161102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |