CN204271945U - A kind of single-electrical signal drives two-way rotary ultrasonic motor - Google Patents
A kind of single-electrical signal drives two-way rotary ultrasonic motor Download PDFInfo
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- CN204271945U CN204271945U CN201420763831.XU CN201420763831U CN204271945U CN 204271945 U CN204271945 U CN 204271945U CN 201420763831 U CN201420763831 U CN 201420763831U CN 204271945 U CN204271945 U CN 204271945U
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Abstract
The utility model discloses a kind of single-electrical signal and drive two-way rotary ultrasonic motor, comprise two identical stator, a rotor and a set of malleation prefastening force adjustment mechanisms, stator comprises axle and is set in back shroud, piezoelectric ceramic piece, electrode slice, the elliptical vibration modal transducer in axle successively; Rotor comprises frictional disk and bearing; Malleation prefastening force adjustment mechanism comprises spring and supporting construction.The utility model utilizes the ellipse vibration mode converter structure of straight beam and cant beam compound particular design, the elliptical orbit motion of stator driving gear end face particle is achieved by the extensional vibration of piezoelectric ceramic piece, when two stators carry out work respectively, rotor is driven to carry out continuous rotation motion respectively.It is simple that the utility model has structure, easy to manufacture, is easy to microminiaturized, integrated, and the advantages such as cost is low, control difficulty is little, have a extensive future.
Description
Technical field
The utility model relates to the ultrasound electric machine field utilizing piezoelectric ceramic inverse piezoelectric effect, especially relates to a kind of single-electrical signal of ultrasonic elliptical vibratory that utilizes and drives two-way rotary ultrasonic motor.
Background technology
Rotary ultrasonic motor is the novel electrical micro-machine of one developing rapidly and apply the eighties in 20th century, it is the electric coupling apparatus utilizing the inverse piezoelectric effect of piezoelectric to realize electric energy-mechanic to change, by the rubbing action between stators and rotators, elastomeric micro breadth oscillation is converted to macroscopical rotary motion of rotor, Direct driver load.The problems such as in current existing rotary-type ultrasound electric machine, ubiquity driving moment is little, and axial volume is large, wearing and tearing difference in the internal-and external diameter contact zone of rotor is large, functional reliability is low.
Single-electrical signal driven-mode conversion hysteria ultrasound electric machine is also the one of ultrasound electric machine, and it is the driving utilizing one group of piezo ceramic element, makes stator produce the complex vibration with two kinds of mode of oscillation components by the modal transducer of special construction.If there is certain phase difference between these two mode of oscillations and frequency is close, on stators and rotators contact interface, the end face particle of stator will produce elliptic vibrations, thus obtains motion and the moment of torsion of rotor by the friction between stators and rotators.
Be CN101860259A at publication number, denomination of invention is in the patent documentation of " single-electrical signal-stimulated rotation ultrasonic motor ", disclosing a kind of utilization utilizes window shape dislocation modal transducer that the extensional vibration that sandwich piezoelectric vibrator produces is converted to driving gear particle elliptical vibration, and then drive the ultrasound electric machine of rotor turns, this invention control-driven system is simple, assembling easily, but its window shape dislocation modal transducer manufacture difficulty is larger, production cost is higher, and it can only carry out single direction rotation, these problems constrain its promotion and application in the industrial production.
Be CN101030740A at publication number, denomination of invention is in the patent documentation of " bending-rotation ultrasonic motor of singlephase drive ", the structure disclosing a kind of body is the singlephase drive standing wave rotary ultrasonic motor of taper, this motor relies on six piezoelectric ceramic pieces be superimposed together vertically to excite the vibration of stator, and six piezoelectric ceramic pieces rely on clamp nut and last item cover to be fixed on axis.Although this motor has the advantages such as output torque is larger, but its complex structure, and misplace because the screw (revolving force) of clamp nut very easily causes between piezoelectric ceramic piece in the compaction process of piezoelectric ceramic piece, be difficult to the technical requirement ensureing dislocation 60 degree between adj acent piezoelectric potsherd; In addition, be not with any positioner between this motor stator and rotor, this makes stator and rotor contact position precision between the two be affected, and then affects the stability of motor torque and speed; There is complex structure in this type of rotary ultrasonic motor, making and installation is more difficult, the problem such as cost is higher, poor stability of motor torque and speed.
Summary of the invention
The utility model provides a kind of novel single-electrical signal and drives two-way rotary ultrasonic motor, object is to overcome the deficiency existed in above-mentioned rotary ultrasonic motor, there is provided that a kind of structure is simple, power output is large, the single-electrical signal that cost is low, the life-span is long, motor output torque is large drives two-way rotary ultrasonic motor.
A kind of single-electrical signal drives two-way rotary ultrasonic motor, comprise two identical stator, a rotor and a set of malleation prefastening force adjustment mechanisms, stator comprises axle and is set in back shroud, piezoelectric ceramic piece, electrode slice, the elliptical vibration modal transducer in axle successively, and axle and elliptical vibration modal transducer are by being fixed back shroud, piezoelectric ceramic piece, electrode slice and elliptical vibration modal transducer after thread connection.Stationary part is also the energy conversion part of ultrasound electric machine simultaneously, the ultrasonic electric energy that ultrasonic-frequency power supply exports is converted to the ultrasonic vibrational energy of stationary part.
Described elliptical vibration modal transducer is integrated, and comprises the barrel portion of lower end and the driving gear part of upper end, and described driving gear part is in the uniform upper end being arranged on barrel portion of circumferencial direction, and the quantity of driving gear is 3-12.Each driving gear composite construction being projected as straight beam and cant beam radially, the geometric centre axes of straight beam and the axis being parallel of barrel portion, one end of straight beam connects with the front end of barrel portion, and the other end overhangs; The side that straight beam axis is departed from one end of cant beam and the front end of barrel portion connects, the middle part of the other end and straight beam connects, the geometric centre axes of cant beam becomes 0-90 degree angle with the geometric centre axes of straight beam, and straight beam and cant beam are arc transition with the connection place of barrel portion and connect.
The object making driving gear form straight beam and cant beam composite construction is the mode of oscillation in order to change elliptical vibration modal transducer, make the longitudinal vibration mode frequency of driving gear and flexural vibration mode frequency close to or equal, due to the existence of straight beam and cant beam composite construction, the longitudinal ultrasonic vibration of the energy conversion part generation of ultrasound electric machine is after being delivered to cant beam, a part of extensional vibration component and a part of flexural vibrations component is decomposed at cant beam root, the extensional vibration component decomposed when cant beam and after flexural vibrations component is delivered to straight beam, with the extensional vibration phase compound that straight beam is propagated, finally formed at straight beam end and there is the extensional vibration component of certain phase difference and the ultrasonic elliptical vibratory of flexural vibrations component compound, namely elliptical vibration modal transducer driving gear end is converted to along the tangential vertical curved composite ultrasonic elliptical vibratory of ultrasound electric machine circumference.
Rotor comprises frictional disk and bearing, and bearing is arranged on frictional disk inside; Malleation prefastening force adjustment mechanism comprises spring and supporting construction, and the ring flange of spring one end and a stator is fixed, and the other end and supporting construction are fixed.
Two described stators are coaxially arranged, and the driving increment of elliptical vibration modal transducer all also contacts with frictional disk towards frictional disk on stator, one of them stator is fixed by ring flange, another stator is connected with spring one end by ring flange, supporting construction is connected in the spring other end, by regulating the position of supporting construction, between two stators and rotators, form malleation pretightning force.
Further, described elliptical vibration modal transducer driving gear end is bonded with A friction material.
Further, two end faces described frictional disk contacted with driving gear are bonded with B friction material.
Further, described back shroud and described axle are made into split-type structural or integral structure.
Further, the utility model only needs road ultrasonic-frequency power supply output signal and a control circuit, when needs rotor rotates to a direction, the signal of telecommunication that ultrasonic-frequency power supply exports is linked into the electrode slice of corresponding stator, if need rotor to rotate to another direction, by change over switch, the signal of telecommunication that this ultrasonic-frequency power supply exports is linked into the electrode slice of another one stator.
The utility model stator adopts sandwich transducer structure, utilize the ellipse vibration mode converter of particular design, the longitudinal vibration mode of one group of piezoelectric ceramic is utilized to achieve the elliptical orbit motion of stator driving gear end face particle, when two stators carry out work respectively, rotor can be driven to carry out shake double-direction turning movement.It is simple that the utility model has structure, and power capacity is large, easy to manufacture, the advantages such as assembly difficulty is low; The utility model only needs one group of control circuit and driving power thereof in addition, and control-driven system is simple, easy to manufacture, and control difficulty little, reliability is high; Simultaneously the utility model have volume little, lightweight, be easy to microminiaturized, integrated, cost is low, low-speed big, noise are little, response is fast, positioning precision is high, without electromagnetic interference and the advantage such as environmental suitability is strong, have a extensive future.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is elliptical vibration modal transducer three-dimensional structure schematic diagram (without ring flange) of the present utility model.
Fig. 3 is application example schematic diagram of the present utility model.
Number in the figure illustrates: 1. axle, 2. back shroud, 3. piezoelectric ceramic piece, 4. electrode slice, 5. ring flange, 6. elliptical vibration modal transducer, 7.A friction material, 8. B friction material, 9. frictional disk, 10. bearing, 11. springs, 12. supporting constructions, 13. ultrasonic-frequency power supplies.
Embodiment
Shown in composition graphs 1,2, single-electrical signal of the present utility model drives two-way rotary ultrasonic motor, comprise two identical stator, a rotor and a set of malleation prefastening force adjustment mechanisms, stator comprises axle 1 and is set in back shroud 2, piezoelectric ceramic piece 3, electrode slice 4, the elliptical vibration modal transducer 6 in axle 1 successively, axle 1 and elliptical vibration modal transducer 6 are by being fixed back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and elliptical vibration modal transducer 6 after thread connection, and described back shroud 2 and described axle 1 are split-type structural.
Elliptical vibration modal transducer 6 is integrated, comprise the barrel portion of lower end and the driving gear part of upper end, driving gear part is in the uniform upper end being arranged on barrel portion of circumferencial direction, the quantity of driving gear is 6, each driving gear composite construction being projected as straight beam and cant beam radially, each driving gear composite construction being projected as straight beam and cant beam radially, the geometric centre axes of straight beam and the axis being parallel of barrel portion, one end connects with the front end of barrel portion, and the other end overhangs; The side that straight beam axis is departed from one end of cant beam and the front end of barrel portion connects, the middle part of the other end and straight beam connects, the geometric centre axes of cant beam becomes 30 degree of angles with the geometric centre axes of straight beam, straight beam and cant beam are arc transition with the connection place of barrel portion and connect, and arc radius is 1mm.
The straight beam width that driving gear radially projects is 2mm, is highly 7mm, and the cant beam width that driving gear radially projects is 1.5mm, and driving gear end is bonded with A friction material 7.
Frictional disk 9 and bearing 10 form the rotor portion of ultrasound electric machine, are set in axle 1 after frictional disk 9 and bearing 10 are connected by interference fits, and two end faces that frictional disk 9 contacts with driving gear are all bonded with B friction material 8;
The malleation prefastening force adjustment mechanism of ultrasound electric machine rotor and two stators comprises spring 11 and supporting construction 12, two stators are coaxially arranged, increment is driven all also to contact with frictional disk 9 towards frictional disk 9, one of them stator is fixed by ring flange 5, another stator is connected with spring 11 one end by ring flange 5, supporting construction 12 is connected in spring 11 other end, malleation pretightning force is formed between two stators and rotators, by the decrement regulating the position of supporting construction 12 can change spring 11, thus regulate ultrasonic motor stator to the precompression of rotor, precompression is set as 8N.
Single-electrical signal drives two-way rotary ultrasonic motor external diameter 10mm, and length 108mm, piezoelectric ceramic used is PZT-8, is of a size of
Ф 10 × Ф 5 × 2mmthe natural frequency of two stators is 101.5KHz, impedance is respectively 58 and 61 ohm, dynamic electric resistor is 18 and 17 ohm, ultrasonic-frequency power supply 13 output voltage range is 0-400V, current range is 0-4A, and output frequency is 101.5 ± 0.01KHz, and ultrasonic-frequency power supply 13 has automatic frequency tracking function in designated frequency range.
Shown in composition graphs 3, during operation, after single-electrical signal drives the electrode slice 4 of a stator of two-way rotary ultrasonic motor to access the signal of telecommunication of ultrasonic-frequency power supply 13 output, due to the inverse piezoelectric effect of piezoelectric ceramic piece 3, piezoelectric ceramic piece 3 will produce longitudinal ultrasonic vibration, the electric energy exported by ultrasonic-frequency power supply 13 is converted to ultrasonic vibrational energy, and drive whole stator to carry out longitudinal ultrasonic vibration, after ultrasonic vibrational energy is delivered to elliptical vibration modal transducer 6 driving gear end from stator, be converted to the vertical curved composite ultrasonic elliptical vibratory of extensional vibration and the flexural vibrations compound with certain phase difference, namely elliptical vibration modal transducer 6 driving gear end is converted to along the tangential vertical curved composite ultrasonic elliptical vibratory of ultrasound electric machine circumference, driving gear end and frictional disk 9 contact, and then drive rotor to be rotated, after ultrasound electric machine runs 30 minutes continuously, ultrasonic-frequency power supply 13 output voltage is 100V, electric current is 0.24A, rotary speed of rotator is 536r/min, running status is good.
When needs rotor rotates to another direction, by change over switch, the signal of telecommunication that this ultrasonic-frequency power supply 13 exports is linked into the electrode slice 4 of another one stator, after another stator runs 30 minutes continuously, ultrasonic-frequency power supply 13 output voltage is 100V, electric current is 0.26A, rotary speed of rotator is 541r/min, and running status is also good.
Claims (4)
1. a single-electrical signal drives two-way rotary ultrasonic motor, comprise two identical stator, a rotor and a set of malleation prefastening force adjustment mechanisms, it is characterized in that: stator comprises axle and is set in back shroud, piezoelectric ceramic piece, electrode slice, the elliptical vibration modal transducer in axle successively, axle and elliptical vibration modal transducer are by being fixed back shroud, piezoelectric ceramic piece, electrode slice and elliptical vibration modal transducer after thread connection; Described elliptical vibration modal transducer is integrated, comprise the barrel portion of lower end and the driving gear part of upper end, the barrel portion of lower end is provided with the ring flange that can connect with external structure, the driving gear part of upper end is in the uniform upper end being arranged on barrel portion of circumferencial direction, the quantity of driving gear is 3-12, each driving gear composite construction being projected as straight beam and cant beam radially, the geometric centre axes of straight beam and the axis being parallel of barrel portion, one end of straight beam connects with the front end of barrel portion, and the other end overhangs; The side that straight beam axis is departed from one end of cant beam and the front end of barrel portion connects, the middle part of the other end and straight beam connects, the geometric centre axes of cant beam becomes 0-90 degree angle with the geometric centre axes of straight beam, and straight beam and cant beam are arc transition with the connection place of barrel portion and connect; Rotor comprises frictional disk and bearing; Malleation prefastening force adjustment mechanism comprises spring and supporting construction; Two described stators are coaxially arranged, and the driving increment of elliptical vibration modal transducer all also contacts with frictional disk towards frictional disk on stator, one of them stator is fixedly installed by ring flange, another stator is connected by ring flange and spring and supporting construction, forms malleation pretightning force between two stators and rotators.
2. single-electrical signal according to claim 1 drives two-way rotary ultrasonic motor, it is characterized in that: described back shroud and described axle are made into split-type structural or integral structure.
3. single-electrical signal according to claim 1 and 2 drives two-way rotary ultrasonic motor, it is characterized in that: described elliptical vibration modal transducer driving gear end is bonded with friction material.
4. single-electrical signal according to claim 1 and 2 drives two-way rotary ultrasonic motor, it is characterized in that: two end faces that described frictional disk contacts with driving gear are bonded with friction material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420763831.XU CN204271945U (en) | 2014-12-09 | 2014-12-09 | A kind of single-electrical signal drives two-way rotary ultrasonic motor |
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| CN201420763831.XU CN204271945U (en) | 2014-12-09 | 2014-12-09 | A kind of single-electrical signal drives two-way rotary ultrasonic motor |
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| CN204271945U true CN204271945U (en) | 2015-04-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410326A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single electric signal driven bilateral rotating ultrasonic motor |
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2014
- 2014-12-09 CN CN201420763831.XU patent/CN204271945U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410326A (en) * | 2014-12-09 | 2015-03-11 | 苏州科技学院 | Single electric signal driven bilateral rotating 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20171209 |