CN2383266Y - Double stator hollow structure circular travel wave ultrasonic motor - Google Patents
Double stator hollow structure circular travel wave ultrasonic motor Download PDFInfo
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- CN2383266Y CN2383266Y CN 99216763 CN99216763U CN2383266Y CN 2383266 Y CN2383266 Y CN 2383266Y CN 99216763 CN99216763 CN 99216763 CN 99216763 U CN99216763 U CN 99216763U CN 2383266 Y CN2383266 Y CN 2383266Y
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Abstract
The utility model belongs to the technical field of a supersonic electric machine which comprises a casing, an upper cover, stators arranged at an upper and a lower positions which are corresponding of the upper cover, a hollow rotor and a pressurized spring, wherein, the rotor is connected by a hollow cylinder and a hollow cone; the circumference of the outer margin of the lower part of the cone is provided with a boss, wherein, the inner surface of which forms an annular groove; the upper and the lower surfaces of the boss are contacted with the double stators. The upper and the lower stators are stuck with felt pads; soft polymer sound-absorbing material is filled in the annular groove. The utility model not only retains the advantages of the existing ultrasonic electric machine, but also has the advantages of simplicity, easy implementation, larger power-volume ratio and easy realization of quiet and noiseless at the time of running compared with the prior art.
Description
The utility model belongs to the ultrasound electric machine technical field.
Piezoelectric ultrasonic motor is an inverse piezoelectric effect of utilizing piezoelectric ceramic, produces ultrasonic vibration at stator surface, and is driven a kind of motor of rotor motion by stator.Can be used for as the camera autofocus system, joint of robot is adjusted the elevation angle, the lifting of car seat, the field that precision positioning etc. are used.General ultrasound electric machine has following characteristics:
1, the slow-speed of revolution, big torque do not need reducing gear can directly drive load.
2, volume is little, structure is flexible, and power to volume ratio is 3-10 a times of electromagnetic machine.
3, starting stops response soon, and the response time is less than 1 millisecond.
4, do not produce electromagnetic interference, be not subjected to electromagnetic interference yet.
5, self-sustaining moment is arranged, gearless gap, but precision positioning.
6, move quiet noiseless.
Existing one type ultrasound electric machine is the ring-like travelling wave supersonic motor of single stator hollow structure, and its structure as shown in Figure 1.Which comprises at least a metal or plastic casing 111, placed stator 18 on the stator bracket 110, piezoelectric patches 19 coheres below metal stator.Rotor 17 is pressed in the upper surface of stator, and ball is placed in the ball retainer 16, and places epitrochanterian location notch.Spring 13 is pushed down ball by spring shim 14 and spring lower baffle plate 15.Loam cake 11 pressing spring overhead gages, and be screwed in shell by screw thread.The application that the motor of similar this structure has been succeeded in Canon's camera, stable under little moment, noiseless.Its weak point is the detent mechanism complexity, and ball and bearing should not be made, and size is difficult to cooperate.Particularly when big moment is moved, cause noise easily.
The ultrasound electric machine of another kind of type is axle output | the ring-like travelling wave supersonic motor of single, double stator, shown in Fig. 2,3: Fig. 2 is the ring-like travelling wave supersonic motor schematic diagram of the axle single stator of output, mainly comprises: bearing 21, stator 22, rotor 23.Jack shaft 24 is placed in the bearing 21, pushes down rotor by pressing spring 25, and rotor is pressed on the stator.Energising back rotor rotation drives the axle rotation.Fig. 3 is the two ring-like travelling wave supersonic motor schematic diagrames of stator of axle output, and the rotor 32 in the middle of its two stators 31,33 are clamped is by jack shaft 34 output torques.Though its structure is compact, moment also can be bigger, in use can't utilize its middle part, and this can't install camera lens for camera one series products, can not bring into play the optimal performance of ultrasound electric machine.Two stator axis are exported ring-like travelling wave supersonic motor and are exported ring-like travelling wave supersonic motor than single stator axis and omitted part in addition such as bearing, and power density increases nearly one times.But in use can't utilize its middle part, this needs a series products of hollow structure for camera etc., can not bring into play the optimal performance of ultrasound electric machine.
The purpose of this utility model is, for overcoming the weak point of prior art, a kind of pair of ring-like travelling wave supersonic motor of stator hollow structure proposed, make the plurality of advantages that has not only kept existing ultrasound electric machine, and it is more simple than prior art, power to volume ratio is bigger, moves the quiet noiseless of easier realization.
The utility model proposes a kind of pair of ring-like travelling wave supersonic motor of stator hollow structure, comprise shell, loam cake and be arranged on wherein stator, hollow rotor, pressing spring, it is characterized in that said stator is two stators of the common driving rotor that is oppositely arranged up and down; Said rotor is joined by a hollow cylinder and a hollow cone body and forms, and the bottom outer rim ring week of this cone is provided with a boss, and the inner surface of this boss forms annular groove, and this boss upper and lower surface contacts with said pair of stator; The upper and lower surface adhesion hairiness felt pan of said upper and lower stator; Be filled with the soft macromolecule sound-absorbing material of one deck in the annular groove of said rotor boss.
The ultrasound electric machine of this new structure of the utility model is to be based upon on the basis of original single stator hollow structure ultrasound electric machine, their overall dimension can be consistent, stator just uses original stator, and the thickness of novel rotor CONTACT WITH FRICTION layer is constant, has still adopted hollow structure.Like this, machining is simplified, and met the interchangeability requirement of Machine Design, the stator of two kinds of ultrasound electric machines and shell can be used instead mutually.The utility model drives the effect that rotor can replace original single stator ultrasound electric machine rotor navigation system with two stator hollow structures, can remove ball and positioning pressuring plate like this, and used two stators to drive rotor jointly, can improve 1 times of the output torque of annular ultrasound electric machine in theory, owing to auxiliary systems such as having saved the location ball also can improve efficiency of motor, can also effectively reduce the heating situation of noise and motor simultaneously.
Brief Description Of Drawings:
Fig. 1 is the ring-like travelling wave supersonic motor structural representation of existing single stator hollow structure.
Fig. 2 is existing axle output | the ring-like travelling wave supersonic motor structural representation of single stator.
Fig. 3 is existing axle output | the ring-like travelling wave supersonic motor structural representation of two stators.
Fig. 4 is the of the present utility model pair of ring-like travelling wave supersonic motor example structure of a stator hollow structure schematic diagram.
Fig. 5 is the hollow rotor structural representation of present embodiment.
The of the present utility model pair of ring-like travelling wave supersonic motor example structure of stator hollow structure is shown in Fig. 4,5, and accompanying drawings is as follows.Among Fig. 4, rotor 46 is clipped in the middle of stator 45 and the following stator 47, and upper and lower stator drives rotor jointly.Following stator is placed on outer casing bottom by felt pad 44, and the upper bottom surface of last stator is also put one deck felt pad 44.Spring 43 is placed on the top of felt pad, and loam cake 41 is screwed on the shell by screw thread, and is pressed on the spring, with the method stator and rotor is exerted pressure.Among Fig. 5, said rotor is joined by a hollow cylinder 461 and a hollow cone body 462 and forms, and the bottom outer rim ring week of this cone is provided with a boss 463, and the inner surface of this boss forms annular groove 464, and this boss upper and lower surface contacts with said pair of stator; The upper and lower surface adhesion hairiness felt pan of said upper and lower stator; Be filled with the soft macromolecule sound-absorbing material of one deck in the annular groove of said rotor boss.
Present embodiment is as follows to the improvement of ultrasound electric machine rotor structure:
1, the hollow structure of ultrasound electric machine rotor
Because double-stator structure makes the upper and lower surface of ultrasound electric machine rotor all become the surface that contacts with stator, the transmission of upper and lower stator vibration energy and the coupling of vibration are influential to the performance of ultrasound electric machine, so still adopt the hollow structure design, and in annular groove, fill the soft macromolecule sound-absorbing material of one deck.Not only can keep the elasticity of rotor but also can reduce noise, avoid the influence of vibration coupling ultrasound electric machine output torque.
2, the location structure of ultrasound electric machine rotor
When the rotor of ultrasound electric machine contacted with stator, rotor can produce circular runout between two stators.In order to suppress the circular runout of rotor, make an annular protrusion in the upper and lower contact layer annular inner portion of rotor, as shown in Figure 5, the internal diameter of this annulus matches with the internal diameter of stator ring gear.As long as upper and lower stator is fixed, rotor is fixing naturally, can not produce circular runout.
3, the structure of ultrasound electric machine rotor torque output
The annulus of single stator ultrasound electric machine rotor output is perpendicular to the rotor upper surface, and as shown in Figure 1, the structure of two stator ultrasound electric machine rotor outputs has been done improvement, and as shown in Figure 5, what be connected with the rotor upper surface is a conical surface, again by conical surface transition for facing directly.
1. from the angle of machining, the length of the conical surface increases, and helps reducing difficulty of processing, and the angle of the conical surface and rotor upper surface is easy to guarantee.The side of the conical surface and stator ring gear is a mating surface, has guaranteed the angle of the conical surface and rotor surface, has also just guaranteed the positioning performance of rotor.
2. according to Principles of Acoustics, on the direction of sound transmission, the variable cross-section place is equivalent to a reflecting surface, energy that can reflect sound, play the filtering gate action, this reduction noise to selective (can determine frequency filtering by conical surface differing heights) is helpful.
Present embodiment basic size is as follows:
Stator: external diameter: φ 64mm; Internal diameter: φ 56mm; Highly: 5.5mm; The number of teeth: 72
Rotor: external diameter: φ 64mm: internal diameter: φ 54mm; Highly: 24.mm;
Housing: external diameter: φ 70mm; Internal diameter: φ 66mm; Highly: 20mm; Wall thickness: 2mm;
The location structure of present embodiment is to realize by the location of upper and lower two stators.In order to make whole rotor system realize radial location, the line of two dog screws is vertical above the line that requires housing below two dog screws and the housing.
In order to reduce the noise of ultrasound electric machine, for the vibration of the piezoelectric ceramic on protection two stators, inhibition housing, on two stator piezoelectric ceramic faces, to add one deck felt and rubber blanket simultaneously, in the hollow groove of rotor, dose one deck macromolecule sound-absorbing material.
Ultrasound electric machine is run well, should also be noted that the correct of the assembling angle of upper and lower stator and line.
(1) will guarantee that ultrasound electric machine can obtain maximum output torque, upper and lower stator should guarantee zero degree assembling angle.The feedback electrode when assembling angulation in the stator tooth facial plane that promptly guarantees two stator back side piezoelectric ceramic is a zero degree.
(2) will make ultrasound electric machine can rotate and have high rotational speed, the line of two stators and driving power must reversal connection.Because the position of two stators when assembling is inverted relatively, when homophase joins, if driving power makes stator (inversion state that the flank of tooth is downward) produce the clockwise capable ripple of relative ground normal direction, then play stator (the upright state that the flank of tooth makes progress) will produce the anticlockwise capable ripple of relative ground normal direction, two is opposite to the row wave line of propagation, offset with the fricative actuating force of contact-making surface about the rotor, cause rotor can not rotate, the ultrasound electric machine heating is serious, the friction material serious wear, the lost of life of motor.So two stators are necessary opposite with the line of driving power.
Claims (3)
1, a kind of pair of ring-like travelling wave supersonic motor of stator hollow structure comprises shell, loam cake and is arranged on wherein stator, hollow rotor, and pressing spring is characterized in that, said stator is two stators of the common driving rotor that is oppositely arranged up and down.
2, as claimed in claim 1 pair of ring-like travelling wave supersonic motor of stator hollow structure, it is characterized in that, said rotor is joined by a hollow cylinder and a hollow cone body and forms, the bottom outer rim ring week of this cone is provided with a boss, the inner surface of this boss forms annular groove, and this boss upper and lower surface contacts with said pair of stator.
3, the as claimed in claim 1 pair of ring-like travelling wave supersonic motor of stator hollow structure is characterized in that, the upper and lower surface adhesion hairiness felt pan of said upper and lower stator; Be filled with soft macromolecule sound-absorbing material layer in the annular groove of said rotor boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99216763 CN2383266Y (en) | 1999-07-16 | 1999-07-16 | Double stator hollow structure circular travel wave ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99216763 CN2383266Y (en) | 1999-07-16 | 1999-07-16 | Double stator hollow structure circular travel wave ultrasonic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2383266Y true CN2383266Y (en) | 2000-06-14 |
Family
ID=34008342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99216763 Expired - Fee Related CN2383266Y (en) | 1999-07-16 | 1999-07-16 | Double stator hollow structure circular travel wave ultrasonic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2383266Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043197B (en) * | 2006-01-14 | 2015-12-02 | 通用电气能源能量变换英国有限公司 | Drive circuit |
| CN109039147A (en) * | 2018-08-31 | 2018-12-18 | 洛阳同铸电子科技有限公司 | A kind of rotary-type linear ultrasonic electric machine driving focusing, zoom lens |
| CN109787509A (en) * | 2019-03-30 | 2019-05-21 | 西华大学 | A kind of bimorph transducer traveling-wave ultrasonic micro machine with high q-factor piezoelectricity |
-
1999
- 1999-07-16 CN CN 99216763 patent/CN2383266Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043197B (en) * | 2006-01-14 | 2015-12-02 | 通用电气能源能量变换英国有限公司 | Drive circuit |
| CN109039147A (en) * | 2018-08-31 | 2018-12-18 | 洛阳同铸电子科技有限公司 | A kind of rotary-type linear ultrasonic electric machine driving focusing, zoom lens |
| CN109787509A (en) * | 2019-03-30 | 2019-05-21 | 西华大学 | A kind of bimorph transducer traveling-wave ultrasonic micro machine with high q-factor piezoelectricity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |