CN201345623Y - Split type spiral stator micromotor - Google Patents
Split type spiral stator micromotor Download PDFInfo
- Publication number
- CN201345623Y CN201345623Y CNU2008200730023U CN200820073002U CN201345623Y CN 201345623 Y CN201345623 Y CN 201345623Y CN U2008200730023 U CNU2008200730023 U CN U2008200730023U CN 200820073002 U CN200820073002 U CN 200820073002U CN 201345623 Y CN201345623 Y CN 201345623Y
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- micromotor
- split type
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- rotor
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- 238000010276 construction Methods 0.000 description 1
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The utility model relates to a split type spiral stator micromotor which belongs to ultrasonic micromotors. A first piezoelectric ultrasonic transducer and a second piezoelectric ultrasonic transducer are both connected with a wave director, and the wave director is wound outside the rotor of the micromotor to form a spiral stator of the micromotor and in contact connection with the rotor of the micromotor. The split type spiral stator micromotor adopts a novel split type structure, in which the driving source and the execution unit of an ultrasonic micromotor are separated and the energy is transmitted via the wave director. The split type spiral stator micromotor has remarkably reduced volume, which is helpful for further miniaturization.
Description
Technical field
The utility model belongs to a kind of new structure miniature ultrasonic motor based on the work of row ripple mode.
Background technology
Electrical micro-machine is widely used in the various MEMS (micro electro mechanical system) (MEMS).In various electrical micro-machines, electromagnetic micro-motor since its complicated structural limitations it is further microminiaturized.The static micro motor that utilizes integrated circuit fabrication process (IC technology) to make can't produce enough power outputs.And ultrasound micro-motor is owing to the microminiaturization that its small size, high pulling torque, high-energy-density characteristic help device is full of prospect.Ultrasound micro-motor is an inverse piezoelectric effect of utilizing piezoceramic material PZT or macromolecule PVDF thin-film material, ultrasonic vibration by the conversion piezoelectric vibrator forms driving force, realizes that ultrasonic vibration can convert mechanical energy to and rely on the micromachine of a kind of brand new that frictional force drives.
Development along with microrobot and MEMS technology has proposed higher specification requirement to ultrasound micro-motor.At present, ultrasound micro-motor continues to develop towards the direction of microminiaturization, and the structure of further simplifying electrical micro-machine is one of them important research means.Designs simplification not only helps the further microminiaturization of ultrasound micro-motor, more can improve the reliability of motor, helps the batch manufacturing of motor, and then reduces its cost.And complex structure, manufacture process requirement height, control are complicated, reliability and life-span are low is development of restriction ultrasound micro-motor and key in application problem always.
In the middle of to the further microminiaturized research of ultrasound micro-motor, exist technologic restriction: promptly be subjected to the processing of piezoelectric and the restriction of manufacture craft problem.On the other hand, the design new structure also is a striving direction of electrical micro-machine microminiaturization always.
Summary of the invention
The utility model provides a kind of split type helical stator micromotor, to solve complex structure, manufacture process requirement height, control complexity, reliability and the low problem of life-span that existing electrical micro-machine exists.
The technical scheme that the utility model is taked is: piezoelectric ultrasonic transducer one is connected with waveguide respectively with piezoelectric ultrasonic transducer two, and this waveguide solderless wrapped connection forms the helical form stator of electrical micro-machine in the rotor exterior of electrical micro-machine, and is connected with the rotor contact of this electrical micro-machine.
The utility model waveguide cross sectional shape is circle or rectangle.
The rotor of the utility model electrical micro-machine adopts cylinder, hollow cylinder, sphere and cone.
Operation principle of the present utility model: ultrasound micro-motor is made up of the stator that rotor and helix tube form, and waveguide and ultrasonic transducer one and two keep in touch in vibration processes; Piezoelectric ultrasonic transducer passes to helical stator by waveguide with the mechanical oscillation harmonic wave, encourages and make it to produce elliptic motion, and then drives working rotor.
The utility model designs a kind of new structure electrical micro-machine, on present piezoelectric micro motor research basis, further simplify the structure of electrical micro-machine, this electrical micro-machine mainly is made up of rotor, spiral type stator and piezoelectric ultrasonic transducer, be with traditional ultrasound micro-motor difference: one, spiral helicine stator structure; Its two, piezoelectric ultrasonic transducer will be gone ripple by waveguide and be passed to stator, promptly piezoelectric ultrasonic transducer and divided stator are from, rather than the structure that bonds together of the piezoelectric of conventional ultrasound electrical micro-machine and stator.
The helical stator structure of the utility model electrical micro-machine itself can realize automatically and rotor between pretension, need not to add in addition preloaded spring; Its distinctive split-type structural helps the further microminiaturization of electrical micro-machine in addition.By the design of this new construction electrical micro-machine, than the design of present ultrasound micro-motor, can simplify the structure of electrical micro-machine greatly, reach high efficiency, low cost, high reliability, more help microminiaturized purpose.
The utility model advantage is:
(1) novel structure is specially and has taked a kind of novel split-type structural---and the drive source of ultrasound micro-motor is separated with execution unit, transmit energy by waveguide.Can reduce the volume of electrical micro-machine greatly, help further microminiaturization.Adopt a kind of pattern of helical stator, increased the friction area between rotor and the stator, and then improved output torque.Waveguide is transmitted to vibration wave (row ripple) in the process of stator surface, and decay can appear in bending wave.The helical stator structure can effectively overcome above problem.
(2) transducer designs and manufacturing no longer are the restraining factors in the electrical micro-machine design process.Because split-type structural, can suitably increase the power of PZT (piezoelectric transducer), and can not influence the microminiaturization of ultrasound micro-motor, the requirement to little manufacturing process of piezoelectric ceramic simultaneously reduces.
(3) design of Controller and control mode are simplified.Owing to adopt the helical stator structure, the linear electric machine design in this project can (depend on machining accuracy) and guarantee positioning accuracy by mechanical structure in the certain resolution scope, safe reliable.Ultrasound micro-motor has higher non-linearity and in time becomes characteristic, realizes that in all periods the accurate location of electrical micro-machine is very difficult, and present means are to make an issue of on control method, and effect is bad.
In addition, drive, realize forward and reverse control of electrical micro-machine, thereby simplify row ripple type ultrasound micro-motor driver control method by switching to the ultrasonic transducer that is connected the waveguide two ends.(general, row ripple class electrical micro-machine is for forward and reverse control more complicated, and the driving power volume is bigger.)
The utility model specifically can be used for following field: the nanometer in (1) national defense industry is miniature, miniplane, spaceship and space probe etc.; (2) robot and micromachine are the fields that China gives priority to 21 century, and little ultrasound electric machine can make robot and micromachine simplified structure, alleviates quality, strengthen reliability.(3) little ultrasound electric machine can enter human body as the surgery medical procedure.As driver as artificial heart, remove thrombus etc., this will promote the industrialization of China's man-made organ and the development of Minimally Invasive Surgery technology greatly.(4) with the miniature ultrasonic motor application in palmtop PC, video telephone, portable instrument etc., will effectively reduce its quality, volume, reduce energy loss; (5) position control accuracy of little ultrasound electric machine can reach micro/nano level, will be used widely in precision instrument, Medical Devices and semiconductor fabrication.Be particularly suitable for the liquid working environment.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 the utility model operation principle schematic diagram.Piezoelectric ultrasonic transducer passes to helical stator by waveguide with the mechanical oscillation harmonic wave, encourages and make it to produce elliptic motion, and then drives working rotor.
Embodiment
Piezoelectric ultrasonic transducer 1 is connected with waveguide 3 respectively with piezoelectric ultrasonic transducer 22, and this waveguide solderless wrapped connection forms the helical form stator 4 of electrical micro-machine in rotor 5 outsides of electrical micro-machine, and is connected with rotor 5 contacts of this electrical micro-machine.
The utility model waveguide 3 cross sectional shapes are circle or rectangle.
The rotor 5 of the utility model electrical micro-machine adopts cylinder, hollow cylinder, sphere and cone.
Claims (3)
1, a kind of split type helical stator micromotor, it is characterized in that: piezoelectric ultrasonic transducer one is connected with waveguide respectively with piezoelectric ultrasonic transducer two, this waveguide solderless wrapped connection forms the helical form stator of electrical micro-machine in the rotor exterior of electrical micro-machine, and is connected with the rotor contact of this electrical micro-machine.
2, a kind of split type helical stator micromotor according to claim 1, it is characterized in that: the waveguide cross sectional shape is circle or rectangle.
3, a kind of split type helical stator micromotor according to claim 1 and 2 is characterized in that: the rotor of electrical micro-machine adopts cylinder, hollow cylinder, sphere and cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200730023U CN201345623Y (en) | 2008-12-30 | 2008-12-30 | Split type spiral stator micromotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200730023U CN201345623Y (en) | 2008-12-30 | 2008-12-30 | Split type spiral stator micromotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201345623Y true CN201345623Y (en) | 2009-11-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200730023U Expired - Fee Related CN201345623Y (en) | 2008-12-30 | 2008-12-30 | Split type spiral stator micromotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201345623Y (en) |
-
2008
- 2008-12-30 CN CNU2008200730023U patent/CN201345623Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091111 Termination date: 20111230 |