CN1360394A - Standing-wave ultrasonic motor rotating bidirectionally - Google Patents
Standing-wave ultrasonic motor rotating bidirectionally Download PDFInfo
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- CN1360394A CN1360394A CN 01138137 CN01138137A CN1360394A CN 1360394 A CN1360394 A CN 1360394A CN 01138137 CN01138137 CN 01138137 CN 01138137 A CN01138137 A CN 01138137A CN 1360394 A CN1360394 A CN 1360394A
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- central shaft
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- 239000000919 ceramic Substances 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 2
- 230000010287 polarization Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 238000005192 partition Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
A stationary wave ultrasonic motor capable of rotation in bidirection includes stator, rotor and central shaft. On the lower end surface of the stator, each section has same polarization direction and equal intervals with partition number being equal to four times of wave length number. On the upper end surface of the stator, there is ring piece of piezoelectric ceramics and metal ring, they are connected to each other. Said metal ring possesses driving teeth arranged along circumferential direction with equal interval and with its center located on the center of polarization area. The number of teeth of the metal ring is twice as number of wavelegnth. The rotor includes friction ring piece and metal ring, they are connected to each other. The friction ring piece contacts with said teeth tightly. The central shaft incldues adjusting mechanism, bottom seat and shell. The stator is fixed on the bottom center. The ring piece is piezoelectric ceramics is connected to power source, but different section has different polarity. The invented motor has advantages of simple technique and driving style, easy adjusting, stable rotation and large output moment.
Description
Technical field
A kind of standing-wave supersonic motor that can two-way rotation belongs to the piezoelectric actuator field.
Background technology
Piezoelectric ultrasonic motor since self response speed fast, cut off self-lock, no electromagnetic distu, characteristics such as low-speed running have very as the driving element of precision instrument to be used widely, and standing wave piezoelectric ultrasonic motor that especially can two-way rotation has more the market competitiveness.Japan's " Applied Physics " magazine (Jpn.J.Appl.Phys) the 37th phase p2966～2969 page, in 1998 are called in " Effect of Pressing Force Applied to a Rotor on Disk-Type Ultrasonic Motor " (the pressurized effect of dish type ultrasonic motor rotor) and have proposed a kind of standing wave piezoelectric ultrasonic motor, its structure such as Fig. 1～and shown in Figure 2.It comprises pretension adjusting mechanism 11, rotor 12 and stator 13 three parts.Wherein, the pretension adjusting mechanism comprises nut 110, spring 111, bearing 112 and middle positioning screw 113; Rotor 12 is made up of the metal disk 120 and the circle friction plate 121 of fluting; Stator 13 is made up of the circular metal plate 131 that is milled with tooth 1310, sensing pottery 132 and driving piezoelectric ceramic piece 133, drives the forward and reverse polarization that replaces between the different cut sections of piezoelectric ceramic piece 133 employings, and tooth is positioned on the boundary line of adjacent two same polarity polarized areas.Add alternating current for respectively lead-in wire 1 and 2 and just can inspire same mode of oscillation, realize two-way rotation at the diverse location of stator.But it has following shortcoming: 1, drive piezoelectric ceramic piece 133 because the polarised direction between different cut sections is inconsistent, bring difficulty for ceramic polarization process, the polarization back is difficult to guarantee the consistency of positive and negative direction electrical quantity, and the internal stress that has polarization to form at the place, line of demarcation of the positive and negative polarization of pottery, can influence motor stator and inspire pure mode of oscillation, generally have some noise jamming; 2, motor stator adopts platy structure, and the mode that excites is (1,3) pattern, and promptly the circumference at stator has a pitch circle.The stator of general this mode is fixed on the pitch circle place, but this motor fixes at centralized positioning screw rod place, can form the inhibition to the motor stator vibration, influences the output of rotor torque; 3, the number of motor stator driving gear is few, has increased the frictional dissipation between the stator and rotor, influences motor useful life.
Summary of the invention
The object of the present invention is to provide a kind of ceramic polarization process easy, type of drive is simple, and is easy to adjust, and rotor rotation is steady, output torque is big and the life-span is grown can two-way rotation standing-wave supersonic motor.
The invention is characterized in, it contains: by the polarised direction unanimity of every cut section on the lower surface, it is four times of number of wavelengths that spacing equates and cut apart number, and the upper surface links to each other for the piezoelectric ceramic ring plate of unified electrode and with it and driving gear is equidistantly arranged the stator of the becket composition that to be centered close to the central number of teeth of polarized area be two times of number of wavelengths of tooth at circumferencial direction, the rotor of forming by friction ring plate that closely contacts with above-mentioned driving gear and the metal ring plate that links to each other with it, central shaft, by the central shaft adjustment screw, the pretension adjusting mechanism that the elasticity adjustment part is formed, inwall have central shaft location annular sleeve and standard ball bearing and base of fixing with stator in the center and the housing that links to each other with it; Wherein, when every cut section all was in the energising operating state, in two cut section fragments being made up of adjacent two pairs of cut sections successively and being closely adjacent to each other, the two pairs of cut sections connect the single channel high frequency ac signal of the opposed polarity that is used to control positive and negative rotation of motor separately.Every external respectively single channel high frequency ac signal that is used to control the motor forward and backward of adjacent two polarized areas on the piezoelectric ceramic ring plate.The number of cutting apart of cut section is 4 times of number of wavelengths.
Use proof: it can realize intended purposes.
Description of drawings
Fig. 1: the three-dimensional installation diagram of existing standing-wave supersonic motor that can two-way rotation.
Fig. 2: the dividing electrodes district vertical view that drives piezoelectric ceramic piece among Fig. 1.
Fig. 3: the present invention proposes can two-way rotation the cutaway view of standing-wave supersonic motor.
Fig. 4: the present invention proposes can two-way rotation the principle schematic of standing-wave supersonic motor.
Fig. 5: the present invention proposes can the standing-wave supersonic motor of two-way rotation on the piezoelectric ceramic ring plate lower surface cut section a, b, c, d distribution and with the connection diagram of single channel high frequency ac signal.
Fig. 6: the upper surface schematic diagram of the piezoelectric ceramic ring plate among Fig. 5.
Embodiment
In Fig. 2, ＂+＂, ＂-＂ represent that electricdomain is a polarised direction, the lead-in wire of 1,2 road of order when representing forward and backward respectively high frequency ac signals, the 1310th, driving gear.
In Fig. 3-Fig. 4, stator 21 is unified electrode by the upper surface, each polarized area electricdomain direction unanimity of lower end, spacing equate, adopt electrode separation and cut apart piezoelectric ceramic ring plate 212 that number is 4 times of number of wavelengths and with its mutually bonding becket 211 compositions.Electricdomain direction one causes between ceramic polarization process simplification and polarized area can not produce internal stress.8 driving gears 2110 are arranged, the spatial separation phase difference of half wavelength of each tooth on the becket 211.The outside flanks of each tooth 2110 and flank adopt the oblique angle design, the teeth groove of flank is than the tooth depth of outside flanks, its objective is to make the distortion that when driving gear 2110 distortion, can be equivalent to straight beam substantially, relatively approach desirable strain, also help the big moment output of motor.Rotor 20 is by forming with driving gear 2110 tight friction ring plates 202 that contact and the metal ring plate 201 bonding with it.Its drive principle is asked for an interview Fig. 4.Symbol , among the figure represent alive polarity, when all being in the energising operating state by all cut sections that make shown in Figure 5, and differ under the condition of 1/4 wavelength at standing wave A and B, make as shown in Figure 5, and cut section a is a
1～a
4With cut section b be b
1～b
4Be in positive polarity, and cut section c is c
1～c
4With d be d
1～d
4Be in negative polarity, get final product vibration mode shown in Fig. 4 (b), if make cut section b, c be in negative polarity a, d is in positive polarity, then shown in Fig. 4 (a), the motor direction of rotation is opposite.Shown in Fig. 4 (b), stator 21 is double vibrations in the scope of solid line and dotted line all the time, the P point is the antinodal point of ultrasonic vibration, the N point is that amplitude is always zero node place, because the driving gear 2110 of this moment is in the scope of a left side 1/4 wavelength that P is ordered, cause the oblique left side of curve of tooth 2110 swing, then the moving direction of rotor 20 left, the arrow among the figure is represented the moving direction on each driving gear 2110 top and the schematic diagram of distance.Pretension is that prestressing force adjusting mechanism 23 is made up of with snap ring 235 with prestressing force adjustment pad 234, standard axle near the location of screw 230, pad 231, butterfly spring 232, rubber ring plate 233 and close central shaft 22 opposite sides of rotor 20 1 ends central shaft 22.The effect of screw 230 is to adjust by the position of 230 pairs of central shafts 22 of screw when motor uses, thereby brings convenience for motor in use aligns the position of central shaft 22 and external piece.The inwall of base 24 has the annular sleeve 241 and the standard ball bearing 242 of central shaft 22 location usefulness, stator 21 is screwed at the base 24 of center and motor, because of the present invention adopts loop configuration, vibration concentrates on the outward flange of stator 21, so can not influence the vibration of stator 21; And not having pitch circle on the stator, vibration concentrates on driving gear 2110 places substantially, also helps the big moment output of motor.
In addition, the material of becket 211 usefulness of the metal ring plate 202 of rotor 20 and stator 21 is respectively aluminium and bronze.
This shows that the present invention has series of advantages such as ceramic polarization process is easy, and type of drive is simple, and rotor rotation is steady, and output torque is big, adjustment is easy for installation.
Claims (4)
1, a kind of standing-wave supersonic motor that can two-way rotation, contain stator, rotor and pretension adjusting mechanism, it is characterized in that, it contains: by the polarised direction unanimity of every cut section on the lower surface, spacing equates and cuts apart number is four times of number of wavelengths, and the upper surface links to each other for the piezoelectric ceramic ring plate of unified electrode and with it and driving gear is equidistantly arranged the stator of the becket composition that to be centered close to the central number of teeth of polarized area be two times of number of wavelengths of tooth at circumferencial direction, the rotor of forming by friction ring plate that closely contacts with above-mentioned driving gear and the metal ring plate that links to each other with it, central shaft, by the central shaft adjustment screw, the pretension adjusting mechanism that the elasticity adjustment part is formed, inwall have central shaft location annular sleeve and standard ball bearing and base of fixing with stator in the center and the housing that links to each other with it; Wherein, when every cut section all was in the energising operating state, in two cut section fragments being made up of adjacent two pairs of cut sections successively and being closely adjacent to each other, the two pairs of cut sections connect the single channel high frequency ac signal of the opposed polarity that is used to control positive and negative rotation of motor separately.Every external respectively single channel high frequency ac signal that is used to control the motor forward and backward of adjacent two polarized areas on the piezoelectric ceramic ring plate.
2, according to claim 1 can two-way rotation standing-wave supersonic motor, it is characterized in that the spatial separation phase difference of half wavelength of each driving gear.
3, according to claim 1 can two-way rotation standing-wave supersonic motor, it is characterized in that: the number of cutting apart of described cut section is 4 times of number of wavelengths.
4, according to claim 1 can two-way rotation standing-wave supersonic motor, it is characterized in that: a side of described piezoelectric ceramic ring plate adopts unified electrode, and opposite side adopt electrode uniformly-spaced formula cut apart, polarised direction is along the ceramic thickness direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01138137XA CN1141781C (en) | 2001-12-31 | 2001-12-31 | standing-wave ultrasonic motor rotating bidirectionally |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01138137XA CN1141781C (en) | 2001-12-31 | 2001-12-31 | standing-wave ultrasonic motor rotating bidirectionally |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1360394A true CN1360394A (en) | 2002-07-24 |
| CN1141781C CN1141781C (en) | 2004-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB01138137XA Expired - Fee Related CN1141781C (en) | 2001-12-31 | 2001-12-31 | standing-wave ultrasonic motor rotating bidirectionally |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459403C (en) * | 2005-04-18 | 2009-02-04 | 南京航空航天大学 | Standing wave frequency change step ultrasonic electric machine |
| CN101719733A (en) * | 2010-01-14 | 2010-06-02 | 马海英 | piezoelectric ceramic motor |
| CN1832325B (en) * | 2006-03-16 | 2012-02-08 | 中国科学技术大学 | Self-locking high precision rotation drive motor |
| CN103107736A (en) * | 2013-02-01 | 2013-05-15 | 东南大学 | Positive and negative transfer phase control method of three-power-supply circular traveling wave ultrasonic motor |
| CN103753603A (en) * | 2014-01-29 | 2014-04-30 | 哈尔滨工业大学 | Single-freedom-degree rotating mechanical arm driven by piezoelectric ultrasonic vibrator |
| CN104506075A (en) * | 2014-10-16 | 2015-04-08 | 南京航空航天大学 | Constant precompression ultrasonic motor capable of bearing axial force |
| CN106899227A (en) * | 2017-03-30 | 2017-06-27 | 东北林业大学 | A kind of enhanced intelligent-driving motor |
-
2001
- 2001-12-31 CN CNB01138137XA patent/CN1141781C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459403C (en) * | 2005-04-18 | 2009-02-04 | 南京航空航天大学 | Standing wave frequency change step ultrasonic electric machine |
| CN1832325B (en) * | 2006-03-16 | 2012-02-08 | 中国科学技术大学 | Self-locking high precision rotation drive motor |
| CN101719733A (en) * | 2010-01-14 | 2010-06-02 | 马海英 | piezoelectric ceramic motor |
| CN103107736A (en) * | 2013-02-01 | 2013-05-15 | 东南大学 | Positive and negative transfer phase control method of three-power-supply circular traveling wave ultrasonic motor |
| CN103107736B (en) * | 2013-02-01 | 2015-07-01 | 东南大学 | Positive and negative transfer phase control method of three-power-supply circular traveling wave ultrasonic motor |
| CN103753603A (en) * | 2014-01-29 | 2014-04-30 | 哈尔滨工业大学 | Single-freedom-degree rotating mechanical arm driven by piezoelectric ultrasonic vibrator |
| CN104506075A (en) * | 2014-10-16 | 2015-04-08 | 南京航空航天大学 | Constant precompression ultrasonic motor capable of bearing axial force |
| CN106899227A (en) * | 2017-03-30 | 2017-06-27 | 东北林业大学 | A kind of enhanced intelligent-driving motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1141781C (en) | 2004-03-10 |
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