CN201742324U - Rotary travelling wave ultrasonic motor - Google Patents
Rotary travelling wave ultrasonic motor Download PDFInfo
- Publication number
- CN201742324U CN201742324U CN2010202194390U CN201020219439U CN201742324U CN 201742324 U CN201742324 U CN 201742324U CN 2010202194390 U CN2010202194390 U CN 2010202194390U CN 201020219439 U CN201020219439 U CN 201020219439U CN 201742324 U CN201742324 U CN 201742324U
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- output shaft
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Abstract
The utility model discloses a rotary travelling wave ultrasonic motor comprising a stator, a rotor, an output shaft, a base and a shell connected with the base. The stator is installed on the base, a piezoelectric ceramic is pasted on the lower surface of the stator, and a lead wire of the piezoelectric ceramic is led out from a slit reserved between the shell and the base; the rotor is installed on the output shaft, damping materials are pasted at the upper end of the rotor, and a friction material layer is pasted on the lower end surface of the rotor and contacted with the stator; and the top end of the output shaft is installed on an end cover of the shell by an upper bearing, and the lower end of the output shaft is positioned on the base by a lower bearing. When alternating voltage is input to the stator, the rotary mode of the stator is excited, and as pre-pressure exists between the stator and the rotor, the friction force is generated between the stator and the rotor and pushes the rotor to rotate; and the power is output by the output shaft. Besides the advantages of the travelling wave ultrasonic motor, the rotary travelling wave ultrasonic motor also has the advantages of simple structure, low cost, high efficiency, easy processing and installation and the like.
Description
Technical field
The utility model relates to a kind of ultrasound electric machine, is specifically related to a kind of compact conformation, and be easy to processing, assembling and use, and the rotary type travelling wave ultrasonic motor of efficient height, applied range.
Background technology
Ultrasound electric machine is to utilize the inverse piezoelectric effect of piezoelectric ceramic and the novel electrical micro-machine of ultrasonic vibration.Rotary type travelling wave ultrasonic motor belongs to a kind of of traveling wave type ultrasonic motor.Rotary type travelling wave ultrasonic motor has more special advantages than conventional motors, for example: simple in structure, compact, torque/weight ratio big (be conventional motors 3～10 times); Low speed high torque need not gear reduction, can realize direct driving, reduces the volume, vibration, noise, energy loss and the driving error that are increased by gear box thus greatly; Response fast (Millisecond); Speed and Position Control are good, divide the frequency height; Cut off self-lock, and can keep original stop position motionless; Do not produce magnetic field, not disturbed by external magnetic field; Can the low noise operation.But existing rotary type travelling wave ultrasonic motor can not possess above advantage mostly simultaneously; And the rotary type travelling wave ultrasonic motor manufacturing cost that can have above advantage fully can not be found broad application than higher.Therefore, functional, structure of development and the simple rotary type travelling wave ultrasonic motor of technology are significant.
The utility model content
Goal of the invention: the purpose of this utility model is to provide a kind of compact conformation, is easy to processing, assembling and use, and the efficient height, the rotary type travelling wave ultrasonic motor that range of application is wider.
Technical scheme: for solving the problems of the technologies described above, rotary type travelling wave ultrasonic motor of the present utility model, comprise stator, rotor, output shaft, base and the shell that is connected with base, described stator is installed on the base, the stator lower surface is pasted with piezoelectric ceramic, and the lead-in wire of piezoelectric ceramic is drawn by the slit of reserving between shell and the base; Described rotor is installed on the output shaft, and the rotor upper end is pasted with damping material, and the rotor lower surface is pasted with friction material layer and contacts with stator; Described output shaft top is installed in shell end by upper bearing (metal) and covers, and the output shaft lower end is positioned on the base by lower bearing.Shell is connected by bolt with base, and by upper bearing (metal) precompression is applied on the rotor, for providing transmission required normal pressure between stator and the rotor.
Described stator is for becoming step-thickness, and the stator upper end is provided with tooth with the rotor position contacting, and this tooth contacts to realize transmission of power with the friction material layer that paste the rotor lower surface.
Described rotor is the flex rotor of band plastic deformation structure, and rotor guarantees normal pressure on stator and the rotor contact interface by itself strain.
Described shell is connected by bolt with base.The shell end face cooperates by upper bearing (metal) with the output shaft top, and bolt is tightened the back and exerted pressure to rotor, produces necessary normal pressure in this way between stator and rotor.
Described rotor is installed on the output shaft by bolt.
Beneficial effect: rotary type travelling wave ultrasonic motor of the present utility model, by stator design is opened up the benefit shape for step-thickness radially, its internal diameter prop up admittedly and the external diameter boundary condition for free, adopt the direct outputting power of armature spindle, make its structure compact more, processing and assembling all are easy to realize higher precision, are more convenient for simultaneously installing and using, and are particularly suitable for the drive unit of precision optical machinery.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the polarization subregion schematic diagram of piezoelectric ceramic 4 among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further explanation.
As shown in Figure 1, rotary type travelling wave ultrasonic motor of the present utility model, comprise stator 6, rotor 7, output shaft 1, base 3 and the shell 10 that is connected with base 3, stator 6 is installed on the base 3, stator 6 lower surfaces are pasted with piezoelectric ceramic 4, and the lead-in wire 5 of piezoelectric ceramic 4 is drawn by the slit of reserving between shell 10 and the base 3; Rotor 7 is installed on the output shaft 1, and rotor 7 upper ends are pasted with damping material 8, and rotor 7 lower surfaces are pasted with friction material layer 11 and contact with stator 6; Output shaft 1 top is installed in by upper bearing (metal) 9 on the end cap of shell 10, and output shaft 1 lower end is positioned on the base 3 by lower bearing 2.
Shell 10 is connected by bolt or screw with base 3, and by upper bearing (metal) 9 precompression is applied on the rotor 7, for providing transmission required normal pressure between stator 6 and the rotor 7.Motor is easier for installation, reliable like this, can not influence the operation mode of motor.
Stator 6 is for becoming step-thickness, and stator 6 upper ends and rotor 7 position contacting are provided with tooth, and this tooth contacts to realize transmission of power with the friction material layer 11 that paste rotor 7 lower surfaces.The thickening degree of stator 6 and slot size and position are calculated through finite element optimum design and are determined, to obtain optimum resonance frequency and maximum stator faces amplitude.Stator 6 ends are provided with horn mouth, and purpose is to add large amplitude and reduce the weight of motor own.
Rotary type travelling wave ultrasonic motor of the present utility model in use, output shaft 1 and rotor 7 are fixed together by screw, upper bearing (metal) 9 is to be slidingly matched with shell 10, and output shaft 1 is positioned; Shell 10 applies axial constraint on the top to upper bearing (metal) 9, when the bolt tightened between base 3 and the shell 10, provides the normal pressure of contact between stator 6 and the rotor 7 by the strain of flex rotor 7.Flex rotor 7 better elastic can reduce radial slippage, improve the efficient of frictional drive.Stator 6 is fixed together by bolt and base 3, and lower bearing 2 is to be slidingly matched with base 3, to output shaft 1 radial support with position.When motor is imported alternating voltage certain in the ultrasonic frequency domain by 5 pairs of stators of lead-in wire 6, stator 6 will be inspired rotation mode, and the particle of its tooth upper surface portion forms elliptic motion.Because have precompression between stator 6 and the rotor 7,7 of stator 6 and rotors can produce frictional force, this frictional force will promote rotor 7 and rotate.Power is by output shaft 1 output.
Fig. 2 comprises A, two groups of big subregions of B two-phase (quadrature on space phase) for the polarization block plan of the piezoelectric ceramic 4 of motor stator use, is multi partition form (operation mode of visual stator carries out specialized designs).Between the piezoelectric ceramic that A, B two-phase have polarized, leave the space of λ/4 and 3 λ/4.Though the polarization of the lonely utmost point in λ/4 in 3 λ between A, B two-phase/4 zones is not used for encouraging stator, does not apply alternating voltage on it.When its during with stator vibration because inverse piezoelectric effect can produce alternating voltage the orphan on extremely, can judge the operating state of ultrasound electric machine by this voltage, thus this voltage can for drive and control circuit as feedback signal, be referred to as the lonely utmost point usually and feed back.
Piezoelectric ceramic piece after the polarization is subjected to electric field action can produce distortion, and the subregion that polarised direction is identical with direction of an electric field produces elongation strain, and the subregion that polarised direction is opposite with direction of an electric field produces compression.So, when piezoelectric ceramic piece being applied the alternating electric field of two-phase quadrature time phase, just can make stator produce transverse bending vibration, and form by the mode of oscillation of two-phase time, the equal quadrature of space phase.When A passes to sin ω t (its frequency equals stator operation mode frequency) alternating voltage mutually, stator will be inspired flexural resonance; When B pass to identical frequency mutually with A, during with the cos ω t alternating voltage of the width of cloth, stator produces another flexural resonance.If with these two voltages be added to respectively simultaneously A mutually and B mutually, so, this two mutually orthogonal flexural vibrations synthetic, stator just presents rotoflector mode, the stator upper surface forms capable ripple, thereby makes arbitrary particle generation elliptic motion on the stator upper surface.This elliptic motion just adds the precompression between stator and rotor, makes and produces frictional force between stator and rotor, promotes rotor and rotates in the opposite direction along stator faces row ripple side.At this moment, the lonely utmost point of piezoelectric ceramic is as the feedback phase, and it is a direct piezoelectric effect of utilizing piezoelectric ceramic piece, produces alternating voltage, in order to as feedback voltage motor being carried out automatic frequency tracking, thereby guarantees that rotating speed of motor is stable.
Rotor of the present invention adopts novel flex rotor, is easy to processing.Rotor size through optimal design can guarantee stator and rotor excellent contact, significantly reduces the slide relative between stator and the rotor, thereby can reduce energy loss, improves efficiency of motor.
The above only is a preferred implementation of the present utility model; be noted that for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. rotary type travelling wave ultrasonic motor, it is characterized in that: comprise stator (6), rotor (7), output shaft (1), base (3) and the shell (10) that is connected with base (3), described stator (6) is installed on the base (3), stator (6) lower surface is pasted with piezoelectric ceramic (4), and the lead-in wire (5) of piezoelectric ceramic (4) is drawn by the slit of reserving between shell (10) and the base (3); Described rotor (7) is installed on the output shaft (1), and rotor (7) upper end is pasted with damping material (8), and rotor (7) lower surface is pasted with friction material layer (11) and contacts with stator (6); Described output shaft (1) top is installed on the end cap of shell (10) by upper bearing (metal) (9), and output shaft (1) lower end is positioned on the base (3) by lower bearing (2).
2. rotary type travelling wave ultrasonic motor according to claim 1 is characterized in that: described stator (6) is for becoming step-thickness, and stator (6) upper end is provided with tooth with rotor (7) position contacting.
3. rotary type travelling wave ultrasonic motor according to claim 1 is characterized in that: described rotor (7) is the flex rotor of band plastic deformation structure.
4. according to each described rotary type travelling wave ultrasonic motor of claim 1 to 3, it is characterized in that: described shell (10) is connected by bolt with base (3).
5. according to each described rotary type travelling wave ultrasonic motor of claim 1 to 3, it is characterized in that: described rotor (7) is installed on the output shaft (1) by bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202194390U CN201742324U (en) | 2010-06-08 | 2010-06-08 | Rotary travelling wave ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202194390U CN201742324U (en) | 2010-06-08 | 2010-06-08 | Rotary travelling wave ultrasonic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201742324U true CN201742324U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202194390U Expired - Fee Related CN201742324U (en) | 2010-06-08 | 2010-06-08 | Rotary travelling wave ultrasonic motor |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223104A (en) * | 2011-06-14 | 2011-10-19 | 南京航空航天大学 | Rotary traveling wave ultrasonic motor capable of adjusting pre-pressure by nuts |
| CN102262837A (en) * | 2011-07-21 | 2011-11-30 | 江苏春生超声电机有限公司 | Power-off self-locking teaching demonstration device |
| CN104238338A (en) * | 2014-07-31 | 2014-12-24 | 厦门理工学院 | Vibration type traveling wave gear transmission device |
| CN105207520A (en) * | 2015-09-21 | 2015-12-30 | 哈尔滨工业大学 | Rotating type traveling wave ultrasonic motor and stator and rotor pre-tightening method thereof |
| CN106374775A (en) * | 2016-09-26 | 2017-02-01 | 宁波大学 | Traveling wave ultrasonic motor containing flexible shaft |
| CN106443450A (en) * | 2016-10-28 | 2017-02-22 | 南京工程学院 | Spatial phase modulation annular traveling wave motor structure error standing wave online detection method |
| CN106646221A (en) * | 2016-06-16 | 2017-05-10 | 北京卫星环境工程研究所 | Rapid determination method of ultrasonic-motor wear failure service life |
| CN107167734A (en) * | 2017-07-12 | 2017-09-15 | 南京航空航天大学 | A kind of ultrasound electric machine starting characteristic method of testing fed back based on lonely pole and device |
| CN108111054A (en) * | 2017-12-18 | 2018-06-01 | 北京卫星制造厂 | The rotary-type supersonic motor that a kind of double elastic polymorphic structures pre-tighten |
| CN109245608A (en) * | 2018-11-19 | 2019-01-18 | 江苏紫金东方超声电机有限公司 | A kind of anti-liquid traveling wave rotary ultrasonic motor |
| CN110571957A (en) * | 2019-09-06 | 2019-12-13 | 重庆东渝中能实业有限公司 | Flexible motor |
| CN110601590A (en) * | 2019-11-05 | 2019-12-20 | 山东理工大学 | Paster type standing wave type double-sided tooth ultrasonic motor stator |
| CN111969886A (en) * | 2020-08-10 | 2020-11-20 | 四川航天系统工程研究所 | Planar two-degree-of-freedom ultrasonic motor structure |
| CN113472238A (en) * | 2021-07-15 | 2021-10-01 | 东南大学 | Self-aligning bearing-free parallel type ultrasonic motor |
-
2010
- 2010-06-08 CN CN2010202194390U patent/CN201742324U/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223104B (en) * | 2011-06-14 | 2013-11-06 | 南京航空航天大学 | Rotary traveling wave ultrasonic motor capable of adjusting pre-pressure by nuts |
| CN102223104A (en) * | 2011-06-14 | 2011-10-19 | 南京航空航天大学 | Rotary traveling wave ultrasonic motor capable of adjusting pre-pressure by nuts |
| CN102262837A (en) * | 2011-07-21 | 2011-11-30 | 江苏春生超声电机有限公司 | Power-off self-locking teaching demonstration device |
| CN102262837B (en) * | 2011-07-21 | 2013-05-15 | 江苏春生超声电机有限公司 | Power-off self-locking teaching demonstration device |
| CN104238338B (en) * | 2014-07-31 | 2017-12-12 | 厦门理工学院 | Oscillating mode traveling wave gear drive |
| CN104238338A (en) * | 2014-07-31 | 2014-12-24 | 厦门理工学院 | Vibration type traveling wave gear transmission device |
| CN105207520A (en) * | 2015-09-21 | 2015-12-30 | 哈尔滨工业大学 | Rotating type traveling wave ultrasonic motor and stator and rotor pre-tightening method thereof |
| CN106646221A (en) * | 2016-06-16 | 2017-05-10 | 北京卫星环境工程研究所 | Rapid determination method of ultrasonic-motor wear failure service life |
| CN106646221B (en) * | 2016-06-16 | 2019-04-09 | 北京卫星环境工程研究所 | The fast determination method in ultrasound electric machine wear-out failure service life |
| CN106374775A (en) * | 2016-09-26 | 2017-02-01 | 宁波大学 | Traveling wave ultrasonic motor containing flexible shaft |
| CN106374775B (en) * | 2016-09-26 | 2018-05-18 | 宁波大学 | A kind of travelling wave supersonic motor containing flexible shaft |
| CN106443450B (en) * | 2016-10-28 | 2019-04-23 | 南京工程学院 | Space phase modulation annular Traveling Ultrasonic Motor structural failure standing wave online test method |
| CN106443450A (en) * | 2016-10-28 | 2017-02-22 | 南京工程学院 | Spatial phase modulation annular traveling wave motor structure error standing wave online detection method |
| CN107167734A (en) * | 2017-07-12 | 2017-09-15 | 南京航空航天大学 | A kind of ultrasound electric machine starting characteristic method of testing fed back based on lonely pole and device |
| CN108111054A (en) * | 2017-12-18 | 2018-06-01 | 北京卫星制造厂 | The rotary-type supersonic motor that a kind of double elastic polymorphic structures pre-tighten |
| CN109245608A (en) * | 2018-11-19 | 2019-01-18 | 江苏紫金东方超声电机有限公司 | A kind of anti-liquid traveling wave rotary ultrasonic motor |
| CN110571957A (en) * | 2019-09-06 | 2019-12-13 | 重庆东渝中能实业有限公司 | Flexible motor |
| CN110601590A (en) * | 2019-11-05 | 2019-12-20 | 山东理工大学 | Paster type standing wave type double-sided tooth ultrasonic motor stator |
| CN110601590B (en) * | 2019-11-05 | 2024-01-26 | 山东理工大学 | Patch type standing wave type double-sided tooth ultrasonic motor stator |
| CN111969886A (en) * | 2020-08-10 | 2020-11-20 | 四川航天系统工程研究所 | Planar two-degree-of-freedom ultrasonic motor structure |
| CN113472238A (en) * | 2021-07-15 | 2021-10-01 | 东南大学 | Self-aligning bearing-free parallel type ultrasonic motor |
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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: 20110209 Termination date: 20130608 |