CN103117674A - Double-vibrator combined type precise positioning ultrasonic motor excited by ultrasonic vibrators - Google Patents
Double-vibrator combined type precise positioning ultrasonic motor excited by ultrasonic vibrators Download PDFInfo
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- CN103117674A CN103117674A CN2013100834206A CN201310083420A CN103117674A CN 103117674 A CN103117674 A CN 103117674A CN 2013100834206 A CN2013100834206 A CN 2013100834206A CN 201310083420 A CN201310083420 A CN 201310083420A CN 103117674 A CN103117674 A CN 103117674A
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Abstract
The invention provides a double-vibrator combined type precise positioning ultrasonic motor excited by ultrasonic vibrators, belongs to the field of ultrasonic vibration application and aims at further improving the output performance of a thread pair drive ultrasonic motor and the linear positioning accuracy of the motor. The ultrasonic motor mainly comprises a thread output shaft, a linear actuator and two ultrasonic vibrators. Fixedly connected shock excitation elements are evenly are arranged in flat lateral sides or grooves of ultrasonic vibrator main bodies, and two combined locking end faces of the ultrasonic vibrators are locked in matching mode. The linear actuator is located in a cylindrical cavity formed by the locking end faces between the two ultrasonic vibrators. The thread output shaft is paired with central thread holes of the ultrasonic vibrators to perform output rotation and linear motion, and a central thread pair can be a replaceable thread pair drive element. The locking between the ultrasonic vibrators and the thread output shaft is achieved by controlling extension of the linear actuator. The double-vibrator combined type precise positioning ultrasonic motor excited by the ultrasonic vibrators can achieve flexible output, and can be used for the fields of aerospace, automobile industry, automation, medical apparatuses and instruments, optical driving, precise positioning systems and the like.
Description
Technical field
The invention belongs to the ultrasonic vibration application, be particularly related to the precision positioning ultrasound electric machine of composite type ultrasonic vibrator excitation.
Background technology
Based on the ultrasound-driven principle, utilize the screw thread pair of column stator (also claiming ultrasonic vibrator) flexural vibration mode to drive ultrasound electric machine mainly by exciting at least two flexural vibration modes on stator space, utilize the inner surface screw thread pair that is coupling in stator of vibration to produce and drive the row ripple, realize the rotation of threaded rod output shaft-rectilinear motion output.Such screw thread pair drive ultrasound electric machine have simple in structure, power output/quality is larger than density, be easy to microminiaturization, positioning precision than high.
At present, based on screw thread pair, drive ultrasound electric machine that several typical structures are arranged: the screw thread driven polyhedron ultrasonic motor that utilizes in-plane bending vibration modal coupling driving row ripple that stator is polyhedral structure, as the patent No. is CN1767347A, CN1964175A and CN10864775A.Utilize the screw drive type ultrasound electric machine that in ring-type superstructure stator surface, the flexural vibration mode standing wave drives, as the patent No. is CN101056073B.In order to reduce the resonance operating frequency of motor stator, the screw linear motor that piezoelectricity composite bent curved beam that an end that a kind of stator adopts cantilever beam structure props up admittedly drives has been proposed, as the patent No. is CN200910080339.6, such motor is mainly to utilize the coupling of the orthogonal space flexural vibration mode of column cantilever beam structure stator to produce driving row ripple, realizes the movement output of output shaft, another kind has the screw drive type column rotation-linear ultrasonic motor of the meaning of representing to mainly contain the ultrasound waveguide screw motor of stator for two types of the metal pipe type of pasting piezoelectric patches and piezoelectricity tubular types, as the patent No. is US2006049720-A1, US2005258714-A1, US7170214-B2, US7309943-B2, CN101040395A and CN1879232A, this ultrasound waveguide screw motor is mainly that on the cylindrical stator space that utilizes two ends freely to retrain, two first-order bending vibrations of quadrature intercouple, produce and drive the row ripple at the free-ended inner surface of stator, stator and output shaft are by the screw thread pair transmission, realize the rotation of output shaft-rectilinear motion output under the effect of axial load power, the mentioned screw drive type ultrasound electric machine stator piezoelectric element used in front adopts more
d 31, there is certain advantage in vibration mode at the microminiaturized manufacture view of motor, and particularly for the ultrasound waveguide screw motor, this advantage embodies more obviously, but unavoidably must have the practical problem that power output is less.In order to improve the power output of motor, improve load characteristic, occurred that a class utilizes piezoelectric element
d 33the piezoelectric plate-sandwiched rotary linear ultrasonic motor of vibration mode, as the patent No. is CN200710304683.X and CN201110304078.9.Utilize the piezoelectricity thread transmission linear ultrasonic motor of MODAL TRANSFORMATION OF A type, as the patent No. is CN201110120487.3.
At present, the secondary ultrasound electric machine that drives of double thread, need constantly by adopting new method, newly design and structure and utilizing the different approach such as vibration mode driving to improve the output performance of ultrasound electric machine, purpose is mainly to improve the output force and moment, improve revolution and linear running precision and positioning precision, circular runout and the motor range error of motor have been reduced, strengthen running stability and dependability, eliminate the hysterisis error that drives screw thread pair, improve motor performance diversity and flexible output.
Summary of the invention
The precision positioning ultrasound electric machine that the purpose of this invention is to provide two oscillator composite type ultrasonic vibrator excitations, the present invention can further improve the output performance that screw thread pair drives ultrasound electric machine, improve the power output/torque factor of motor, and can eliminate driving error between screw thread pair, thereby revolution or the linear positions of motor have been improved.
The precision positioning ultrasound electric machine of provided by the invention pair of oscillator composite type ultrasonic vibrator excitation, described motor mainly comprises two composite type ultrasonic vibrators and the assemblies such as linear actuators, screw thread pair driving element and screw thread output shaft.This motor drives the screw thread output shaft by two oscillator composite type ultrasonic vibrator excitation screw thread pairs, utilize stack and the coupling of ultrasonic vibrator excited vibration, produce the row ripple in the screw thread pair interior threaded surface, drive the screw thread output shaft rotation coordinated with it, and simultaneously straight line output, realize the rotation of screw thread output shaft-rectilinear motion output.By controlling the locking function between ultrasonic vibrator and screw thread output shaft that elongated or shortened of linear actuators, eliminate the hysterisis error that drives screw thread pair, realize the accurate function that drives location of ultrasound electric machine.
The technical scheme that the present invention takes for achieving the above object is:
The precision positioning ultrasound electric machine of two oscillator composite type ultrasonic vibrator excitations, the precision positioning ultrasound electric machine of described pair of oscillator composite type ultrasonic vibrator excitation mainly comprises the screw thread output shaft, linear actuators, a plurality of exciting elements and two ultrasonic vibrators, ultrasonic vibrator is the column elastomer, ultrasonic vibrator comprises by the exciting main body with in conjunction with locking end, be positioned at by an end of exciting main body and the two and be made as one in conjunction with locking end, in conjunction with locking end, it is outstanding disk-like structure, other end center by the exciting main body is provided with screwed hole, be provided with reentrant cylindrical cavity in conjunction with the locking end center, for built-in installation linear actuators, screwed hole and communicate setting coaxial with reentrant cylindrical cavity, be laid with the exciting element on the circumferential lateral surface of exciting main body, for the exciting ultrasonic vibrator, two ultrasonic vibrators closely connect in conjunction with locking end by two, linear brake is arranged in the reentrant cylindrical cavity of two ultrasonic vibrators, linear brake is provided with the hollow cylindrical hole, the screw thread output shaft is through the hollow cylindrical hole of linear brake and export rotation and rectilinear motion with the screwed hole pairing of two ultrasonic vibrators, by controlling the locking realized between ultrasonic vibrator and screw thread output shaft that elongates or shortens of linear actuators.
Described by uniform at least four Ping sides, symmetrical configuration quadrate orientation or the groove of being processed with on the circumferential lateral surface of exciting main body, the quantity of exciting element is consistent with the quantity of flat side or groove, on each flat side or groove in an affixed exciting element.
Described linear brake is formed by piezoelectric pile lamination assembled package, and the both ends of the surface of linear brake compress mounted in pairing mode in two reentrant cylindrical cavities of two ultrasonic vibrators.
The precision positioning ultrasound electric machine of described pair of oscillator composite type ultrasonic vibrator excitation mainly comprises the screw thread output shaft, linear actuators, a plurality of exciting elements, two screw thread pair driving elements and two ultrasonic vibrators, ultrasonic vibrator is the column elastomer, ultrasonic vibrator comprises by the exciting main body with in conjunction with locking end, be positioned at by an end of exciting main body and the two and be made as one in conjunction with locking end, in conjunction with locking end, it is outstanding disk-like structure, exciting main body other end center is provided with screw thread pair driving element installing hole, be provided with reentrant cylindrical cavity in conjunction with the locking end center, for built-in installation linear actuators, screw thread pair driving element installing hole and reentrant cylindrical cavity coaxially arrange, screw thread pair driving element installing hole communicates by the through hole be arranged between the two with reentrant cylindrical cavity, be laid with the exciting element on the circumferential lateral surface of exciting main body, for the exciting ultrasonic vibrator, two ultrasonic vibrators closely connect in conjunction with locking end by two, linear brake is provided with the hollow cylindrical hole, the screw thread pair driving element is provided with threaded central aperture, the screw thread pair driving element is fastenedly connected mounted in pairing mode in the screw thread pair driving element installing hole of ultrasonic vibrator, the screw thread output shaft is through the hollow cylindrical hole of linear brake and export rotation and rectilinear motion with the threaded central aperture pairing of two screw thread pair driving elements, by controlling the locking realized between ultrasonic vibrator and screw thread output shaft that elongates or shortens of linear actuators.
The material thermal expansion coefficient of described ultrasonic vibrator is less than or equal to the material thermal expansion coefficient of screw thread pair driving element.
The profile of described screw thread pair driving element is cylindrical or truncated cone-shaped, and screw thread pair driving element installing hole is cylindrical structural hole or conical structure hole.
Described by uniform at least four Ping sides, symmetrical configuration quadrate orientation or the groove of being processed with on the circumferential lateral surface of exciting main body, the quantity of exciting element is consistent with the quantity of flat side or groove, on each flat side or groove in an affixed exciting element.
Described linear brake is formed by piezoelectric pile lamination assembled package, and the both ends of the surface of linear brake compress mounted in pairing mode in two reentrant cylindrical cavities of two ultrasonic vibrators.
The present invention with respect to the beneficial effect of prior art is:
The precision positioning ultrasound electric machine of two oscillator composite type ultrasonic vibrator excitations that, the present invention proposes, two ultrasonic vibrators can combine driving, reach the exert oneself/moment output of motor, the flexible output of performance, reduce circular runout and the motor range error of motor, improved the Stability and dependability of motor output performance.
The precision positioning ultrasound electric machine of two oscillator composite type ultrasonic vibrator excitations that two, the present invention proposes, by controlling the locking function between ultrasonic vibrator and screw thread output shaft that elongated or shortened of linear actuators, eliminate the hysterisis error that drives screw thread pair, realize the accurate function that drives location of ultrasound electric machine.
Three, the present invention has significantly improved such screw thread pair and has driven the ultrasound electric machine output performance, applying flexible, and realize flexibility output, realize ultrasound electric machine energetically/moment output, reduce kinematic error, and realize that the precision of ultrasound electric machine drives, and promotes screw thread pair to drive the practicalization of ultrasound electric machine.The present invention has broad application prospects in fields such as Aero-Space, auto industry, automation, medicine equipment, optical drive and Precision Position Location Systems.
The accompanying drawing explanation
Fig. 1 illustrates the precision positioning ultrasonic electric owner TV structure schematic diagram of two oscillator composite type ultrasonic vibrator excitations;
Fig. 2 illustrates exciting element 4 and is fixed in by the two oscillator composite type ultrasonic vibrator master TV structure schematic diagrames on the flat side of the periphery of exciting main body 6;
Fig. 3 illustrates the exciting element distribution map of two oscillator composite type ultrasonic vibrators in Fig. 1, the polarised direction that in figure, P is piezoelectric crystal material;
Fig. 4 illustrates exciting element 4 and is fixed in by the two oscillator composite type ultrasonic vibrator master TV structure schematic diagrames in the peripheral groove of exciting main body 6;
Fig. 5 illustrates embedded in Fig. 4 (being that the exciting element is fixed on by the peripheral groove of exciting main body 6) exciting element distribution map, the polarised direction that in figure, P is piezoelectric crystal material;
Fig. 6 illustrates and utilizes two oscillator composite type ultrasonic vibrators and the secondary accurate main TV structure schematic diagram that drives the location ultrasound electric machine of cylindrical thread thereof;
Fig. 7 illustrates and utilizes two oscillator composite type ultrasonic vibrators and the accurate main TV structure schematic diagram that drives the location ultrasound electric machine of truncated cone-shaped screw thread pair thereof;
Fig. 8 illustrates the main TV structure schematic diagram of the two oscillator composite type ultrasonic vibrators described in Fig. 6;
Fig. 9 illustrates the two oscillator composite type ultrasonic vibrator exciting element distribution maps described in Fig. 6, the polarised direction that in figure, P is piezoelectric crystal material;
Figure 10 illustrates the main TV structure schematic diagram of the two oscillator composite type ultrasonic vibrators described in Fig. 7;
Figure 11 illustrates the exciting element distribution map of the two oscillator composite type ultrasonic vibrators described in Fig. 7, the polarised direction that in figure, P is piezoelectric crystal material.
In figure: piezoelectric pile lamination 1, screw thread pair driving element 2, screw thread output shaft 3, exciting element 4, linear actuators 5, by exciting main body 6, in conjunction with locking end 7, reentrant cylindrical cavity 8, screwed hole 9, hollow cylindrical hole 10, ultrasonic vibrator 11, connect locking through hole 12, through hole 13, cylindrical structural hole 14, truncated cone-shaped structure hole 15.
Embodiment
Embodiment one: referring to Fig. 1 to Fig. 5, the precision positioning ultrasound electric machine of two oscillator composite type ultrasonic vibrator excitations, the precision positioning ultrasound electric machine of described pair of oscillator composite type ultrasonic vibrator excitation mainly comprises screw thread output shaft 3, linear actuators 5, a plurality of exciting elements 4 and two ultrasonic vibrators 11, ultrasonic vibrator 11 is the column elastomer, ultrasonic vibrator 11 comprises by exciting main body 6 with in conjunction with locking end 7, be positioned at by an end of exciting main body 6 and the two and be made as one in conjunction with locking end 7, in conjunction with locking end 7, it is outstanding disk-like structure, other end center by exciting main body 6 is provided with screwed hole 9, be provided with reentrant cylindrical cavity 8 in conjunction with locking end 7 centers, for built-in installation linear actuators 5, screwed hole 9 and communicate setting coaxial with reentrant cylindrical cavity 8, be laid with exciting element 4 on the circumferential lateral surface of exciting main body 6, for exciting ultrasonic vibrator 11, two ultrasonic vibrators 11 closely connect in conjunction with locking end 7 by two that (each connects locking through holes 12 in conjunction with being laid with four on locking end 7, two in conjunction with the corresponding setting one by one of the locking of the connection on locking end 7 through hole 12, two closely connect by penetrating the bolt connected in locking through hole 12 in conjunction with locking end 7), linear brake 5 is positioned at the reentrant cylindrical cavity 8 of two ultrasonic vibrators 11, linear brake 5 is provided with hollow cylindrical hole 10, screw thread output shaft 3 is through the hollow cylindrical hole 10 of linear brake 5 and export rotation and rectilinear motions with screwed hole 9 pairings of two ultrasonic vibrators 11, realize the locking of 3 of ultrasonic vibrator 11 and screw thread output shafts by controlling elongating or shortening of linear actuators 5.This technical scheme has been eliminated the hysterisis error that drives screw thread pair, realizes the accurate function that drives location of ultrasound electric machine.
Embodiment two: the precision positioning ultrasound electric machine of one described pair of oscillator composite type ultrasonic vibrator excitation of embodiment, described by uniform Ping side, at least four symmetrical configuration quadrate orientation (as Fig. 2 and Fig. 3) or the groove (Fig. 4 and Fig. 5) of being processed with on the circumferential lateral surface of exciting main body 6, the quantity of exciting element 4 is consistent with the quantity of flat side or groove, an affixed exciting element 4(exciting element 4 is fixed on flat side by cold welding or epoxide-resin glue or in groove on each flat side or in groove, make ultrasonic vibrator 11 structures compacter).
Embodiment three: as shown in Fig. 6 ~ Figure 11, the precision positioning ultrasound electric machine of two oscillator composite type ultrasonic vibrator excitations, the precision positioning ultrasound electric machine of described pair of oscillator composite type ultrasonic vibrator excitation mainly comprises screw thread output shaft 3, linear actuators 5, a plurality of exciting elements 4, two screw thread pair driving elements 2 and two ultrasonic vibrators 11, ultrasonic vibrator 11 is the column elastomer, ultrasonic vibrator 11 comprises by exciting main body 6 with in conjunction with locking end 7, be positioned at by an end of exciting main body 6 and the two and be made as one in conjunction with locking end 7, in conjunction with locking end 7, it is outstanding disk-like structure, exciting main body 6 other end centers are provided with screw thread pair driving element installing hole, be provided with reentrant cylindrical cavity 8 in conjunction with locking end 7 centers, for built-in installation linear actuators 5, screw thread pair driving element installing hole and reentrant cylindrical cavity 8 coaxially arrange, screw thread pair driving element installing hole communicates by the through hole 13 be arranged between the two with reentrant cylindrical cavity 8, be laid with exciting element 4 on the circumferential lateral surface of exciting main body 6, for the exciting ultrasonic vibrator, two ultrasonic vibrators 11 closely connect in conjunction with locking end 7 by two that (each connects locking through holes 12 in conjunction with being laid with four on locking end 7, two in conjunction with the corresponding setting one by one of the locking of the connection on locking end 7 through hole 12, two closely connect by penetrating the bolt connected in locking through hole 12 in conjunction with locking end 7), linear brake 5 is provided with hollow cylindrical hole 10, screw thread pair driving element 2 is provided with threaded central aperture, screw thread pair driving element 2 is fastenedly connected mounted in pairing mode in the screw thread pair driving element installing hole of ultrasonic vibrator 11, screw thread output shaft 3 is through the hollow cylindrical hole 10 of linear brake 5 and export rotation and rectilinear motion with the threaded central aperture pairing of two screw thread pair driving elements 2, realize the locking of 3 of ultrasonic vibrator 11 and screw thread output shafts by controlling elongating or shortening of linear actuators 5.This technical scheme has been eliminated the hysterisis error that drives screw thread pair, realizes the accurate function that drives location of ultrasound electric machine.
The material thermal expansion coefficient of the ultrasonic vibrator 11 described in present embodiment is less than or equal to the material thermal expansion coefficient of screw thread pair driving element 2.
Embodiment four: as shown in Fig. 6, Fig. 7, Fig. 8 and Figure 10, the precision positioning ultrasound electric machine of three described pairs of oscillator composite type ultrasonic vibrator excitations of embodiment, the profile of described screw thread pair driving element 2 is cylindrical or truncated cone-shaped, and screw thread pair driving element installing hole is cylindrical structural hole 14 or conical structure hole 15.
Embodiment five: the precision positioning ultrasound electric machine of three described pairs of oscillator composite type ultrasonic vibrator excitations of embodiment, described by uniform Ping side, at least four symmetrical configuration quadrate orientation (as Fig. 6 and Fig. 7) or the groove (Fig. 8 and Figure 10) of being processed with on the circumferential lateral surface of exciting main body 6, the quantity of exciting element 4 is consistent with the quantity of flat side or groove, an affixed exciting element 4(exciting element 4 is fixed on flat side by cold welding or epoxide-resin glue or in groove on each flat side or in groove, make ultrasonic vibrator 11 structures compacter).
Embodiment six: as shown in FIG. 6 and 7, the precision positioning ultrasound electric machine of described pair of oscillator composite type ultrasonic vibrator excitation of present embodiment, described linear brake 5 is formed by piezoelectric pile lamination 1 assembled package, and the both ends of the surface of linear brake 5 compress mounted in pairing mode in two reentrant cylindrical cavities 8 of two ultrasonic vibrators 11.
Embodiment: the exciting mode of the precision positioning ultrasound electric machine of the two oscillator composite type ultrasonic vibrators excitations that propose for the present invention be take precision positioning ultrasound electric machine that one described pair of oscillator composite type ultrasonic vibrator of embodiment encourages and is described as example.This pair of oscillator composite type ultrasonic vibrator can adopt single order, second order or more the high-order flexural vibration mode carry out driving work.The present embodiment only adopts first-order bending vibration mode to be described to two oscillator composite type ultrasonic vibrators.Two oscillator composite type ultrasonic vibrators exciting element used adopts the d31 vibration mode, the polarization of the type piezoelectric patches through-thickness, and upper and lower surface is coated with the energising galactic pole, and during the energising excitation, strain deformation direction and polarised direction are perpendicular.Ultrasonic vibrator exciting element used in two oscillator composite type ultrasonic vibrators is an exciting group, is respectively 4a, 4b, 4c and 4d; Wherein 4a and 4c lead to sin(ω t), 4b and 4d lead to sin(ω t+ φ); Another one ultrasonic vibrator exciting element used in two oscillator composite type ultrasonic vibrators is another exciting group, and correspondence also is respectively 4a, 4b, 4c and 4d; Wherein 4a and 4c logical-sin(ω t), lead to-sin(ω t+ φ of 4b and 4d); Can be expressed as the excitation ac signal of the exciting element at the correspondence position place of two oscillator composite type ultrasonic vibrators in the composite type ultrasonic vibrator with frequently reverse; Ultrasonic vibrator metal part self ground connection; Wherein the frequencies omega of this ac signal generally should match with the first-order bending vibration resonance frequency of two oscillator composite type ultrasonic vibrators or be close, and phase difference is generally 90 or 270 degree, can realize the rotation of the both forward and reverse directions of screw thread output shaft-rectilinear motion output.
Realize that for the precision positioning ultrasound electric machine of described pair of oscillator composite type ultrasonic vibrator excitation of the present embodiment locking function and the step mode of eliminating the hysterisis error that drives screw thread pair can be described as: elongating or shortening of linear actuators passes through to adopt piezoelectric element d33 vibration mode, the polarization of the type piezoelectric patches through-thickness, the energising galactic pole that upper and lower surface is coated with, during the energising excitation, strain deformation direction parallels to realize with polarised direction.When linear actuators is passed to the direct voltage of certain numerical value, linear actuators can produce and elongate or shorten accordingly quiet distortion; Can also pass to two oscillator composite type ultrasonic vibrators the direct voltage of certain numerical value simultaneously, make two oscillator composite type ultrasonic vibrators produce corresponding shortening or extend quiet distortion, reached thus the locking function between two oscillator composite type ultrasonic vibrators and screw thread output shaft, eliminate the hysterisis error that drives screw thread pair, realize the accurate function that drives location of ultrasound electric machine.
Just provided a kind of in many optional embodiments in the present invention, as for the execution mode of the energising excitation of other adoptable exciting element and linear brake, for this area worker with relevant professional knowledge, should and can analogize and know.
Claims (8)
1. the precision positioning ultrasound electric machine of two oscillator composite type ultrasonic vibrators excitations, the precision positioning ultrasound electric machine of described pair of oscillator composite type ultrasonic vibrator excitation mainly comprises screw thread output shaft (3), linear actuators (5), a plurality of exciting elements (4) and two ultrasonic vibrators (11), it is characterized in that: ultrasonic vibrator (11) is the column elastomer, ultrasonic vibrator (11) comprises by exciting main body (6) with in conjunction with locking end (7), be positioned at by an end of exciting main body (6) and the two and be made as one in conjunction with locking end (7), in conjunction with locking end (7), it is outstanding disk-like structure, be provided with screwed hole (9) by the other end center of exciting main body (6), be provided with reentrant cylindrical cavity (8) in conjunction with locking end (7) center, for built-in installation linear actuators (5), screwed hole (9) and communicate setting coaxial with reentrant cylindrical cavity (8), be laid with exciting element (4) on the circumferential lateral surface of exciting main body (6), for the exciting ultrasonic vibrator, two ultrasonic vibrators (11) closely connect in conjunction with locking end (7) by two, linear brake (5) is arranged in the reentrant cylindrical cavity (8) of two ultrasonic vibrators (11), linear brake (5) is provided with hollow cylindrical hole (10), screw thread output shaft (3) is through the hollow cylindrical hole (10) of linear brake (5) and export rotation and rectilinear motion with screwed hole (9) pairing of two ultrasonic vibrators (11), by controlling the locking realized between ultrasonic vibrator (11) and screw thread output shaft (3) that elongates or shortens of linear actuators (5).
2. the precision positioning ultrasound electric machine of as claimed in claim 1 pair of oscillator composite type ultrasonic vibrator excitation, it is characterized in that: described by uniform at least four Ping sides, symmetrical configuration quadrate orientation or the groove of being processed with on the circumferential lateral surface of exciting main body (6), the quantity of exciting element (4) is consistent with the quantity of flat side or groove, on each flat side or groove in an affixed exciting element (4).
3. the precision positioning ultrasound electric machine of as claimed in claim 1 pair of oscillator composite type ultrasonic vibrator excitation, it is characterized in that: described linear brake (5) is formed by piezoelectric pile lamination (1) assembled package, and the both ends of the surface of linear brake (5) compress mounted in pairing mode in two reentrant cylindrical cavities (8) of two ultrasonic vibrators (11).
4. the precision positioning ultrasound electric machine of two oscillator composite type ultrasonic vibrators excitations, it is characterized in that: the precision positioning ultrasound electric machine of described pair of oscillator composite type ultrasonic vibrator excitation mainly comprises screw thread output shaft (3), linear actuators (5), a plurality of exciting elements (4), two screw thread pair driving elements (2) and two ultrasonic vibrators (11), ultrasonic vibrator (11) is the column elastomer, ultrasonic vibrator (11) comprises by exciting main body (6) with in conjunction with locking end (7), be positioned at by an end of exciting main body (6) and the two and be made as one in conjunction with locking end (7), in conjunction with locking end (7), it is outstanding disk-like structure, exciting main body (6) other end center is provided with screw thread pair driving element installing hole, be provided with reentrant cylindrical cavity (8) in conjunction with locking end (7) center, for built-in installation linear actuators (5), screw thread pair driving element installing hole and the coaxial setting of reentrant cylindrical cavity (8), screw thread pair driving element installing hole communicates by the through hole (13) be arranged between the two with reentrant cylindrical cavity (8), be laid with exciting element (4) on the circumferential lateral surface of exciting main body (6), for the exciting ultrasonic vibrator, two ultrasonic vibrators (11) closely connect in conjunction with locking end (7) by two, linear brake (5) is provided with hollow cylindrical hole (10), screw thread pair driving element (2) is provided with threaded central aperture, screw thread pair driving element (2) is fastenedly connected mounted in pairing mode in the screw thread pair driving element installing hole of ultrasonic vibrator (11), screw thread output shaft (3) is through the hollow cylindrical hole (10) of linear brake (5) and export rotation and rectilinear motion with the threaded central aperture pairing of two screw thread pair driving elements (2), by controlling the locking realized between ultrasonic vibrator (11) and screw thread output shaft (3) that elongates or shortens of linear actuators (5).
5. the precision positioning ultrasound electric machine of as claimed in claim 4 pair of oscillator composite type ultrasonic vibrator excitation, it is characterized in that: the material thermal expansion coefficient of described ultrasonic vibrator (11) is less than or equal to the material thermal expansion coefficient of screw thread pair driving element (2).
6. the precision positioning ultrasound electric machine of as claimed in claim 5 pair of oscillator composite type ultrasonic vibrator excitation, it is characterized in that: the profile of described screw thread pair driving element (2) is cylindrical or truncated cone-shaped, and screw thread pair driving element installing hole is cylindrical structural hole (14) or conical structure hole (15).
7. the precision positioning ultrasound electric machine of as claimed in claim 5 pair of oscillator composite type ultrasonic vibrator excitation, it is characterized in that: described by uniform at least four Ping sides, symmetrical configuration quadrate orientation or the groove of being processed with on the circumferential lateral surface of exciting main body (6), the quantity of exciting element (4) is consistent with the quantity of flat side or groove, on each flat side or groove in an affixed exciting element (4).
8. the precision positioning ultrasound electric machine of as claimed in claim 5 pair of oscillator composite type ultrasonic vibrator excitation, it is characterized in that: described linear brake (5) is formed by piezoelectric pile lamination (1) assembled package, and the both ends of the surface of linear brake (5) compress mounted in pairing mode in two reentrant cylindrical cavities (8) of two ultrasonic vibrators (11).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856099A (en) * | 2014-03-26 | 2014-06-11 | 长春工业大学 | Sheet-bonding-type rotary linear ultrasonic motor with disk-shaped structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03190579A (en) * | 1989-12-18 | 1991-08-20 | Brother Ind Ltd | Ultrasonic motor bed |
| CN101702592A (en) * | 2009-11-09 | 2010-05-05 | 南京航空航天大学 | Travelling wave ultrasound motor with dual stator and rotor multi-diameter shaft structure |
| CN202231635U (en) * | 2011-09-23 | 2012-05-23 | 辽宁工业大学 | Double-vibrator parallel travelling wave type ultrasonic motor |
| CN102843064A (en) * | 2012-09-29 | 2012-12-26 | 哈尔滨工业大学 | Flexible replaceable screw thread pair driving ultrasonic motor |
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2013
- 2013-03-16 CN CN201310083420.6A patent/CN103117674B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03190579A (en) * | 1989-12-18 | 1991-08-20 | Brother Ind Ltd | Ultrasonic motor bed |
| CN101702592A (en) * | 2009-11-09 | 2010-05-05 | 南京航空航天大学 | Travelling wave ultrasound motor with dual stator and rotor multi-diameter shaft structure |
| CN202231635U (en) * | 2011-09-23 | 2012-05-23 | 辽宁工业大学 | Double-vibrator parallel travelling wave type ultrasonic motor |
| CN102843064A (en) * | 2012-09-29 | 2012-12-26 | 哈尔滨工业大学 | Flexible replaceable screw thread pair driving ultrasonic motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856099A (en) * | 2014-03-26 | 2014-06-11 | 长春工业大学 | Sheet-bonding-type rotary linear ultrasonic motor with disk-shaped structure |
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