CN102497132A - Ceramic embedded I-shaped four-foot linear ultrasonic motor vibrator - Google Patents
Ceramic embedded I-shaped four-foot linear ultrasonic motor vibrator Download PDFInfo
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- CN102497132A CN102497132A CN2011104358765A CN201110435876A CN102497132A CN 102497132 A CN102497132 A CN 102497132A CN 2011104358765 A CN2011104358765 A CN 2011104358765A CN 201110435876 A CN201110435876 A CN 201110435876A CN 102497132 A CN102497132 A CN 102497132A
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Abstract
A ceramic embedded I-shaped four-foot linear ultrasonic motor vibrator belongs to the technical field of piezoelectric ultrasonic motors, eliminating various adverse effects caused by the coupled lateral vibration of the conventional rectangular four-foot linear ultrasonic motor vibrator. A piezoelectric ceramic sheet of the ceramic embedded I-shaped four-foot linear ultrasonic motor vibrator is excited by two-phase alternating voltage signals of which the amplitude values are equal, the frequencies are the resonance frequency of the vibrator and the phase difference is plus 90 degrees; piezoelectric ceramic sheets on a horizontal metal beam and a vertical metal beam of the ceramic embedded I-shaped four-foot linear ultrasonic motor vibrator are excited by two-phase voltage respectively; two vibrating modes are excited in the vibrator through the telescopic vibration of the piezoelectric ceramic sheet; the two vibrating modes are superposed on four terminals of the horizontal metal beam, namely generating an elliptic movement track by particles on the surfaces of four driving feet; and when the four driving feet contact rotors on two sides of the four driving feet under a certain prepressure, a macroscopic movement output can be realized by frictional coupling between the driving feet and the rotors. The ceramic embedded I-shaped four-foot linear ultrasonic motor vibrator is applicable to manufacturing of a ultrasonic motor.
Description
Technical field
The present invention relates to the embedded I shape four-pin linear ultrasonic motor vibrator of a kind of pottery, belong to the piezoelectric ultrasonic motor technical field.
Background technology
Piezoelectric ultrasonic motor is a kind of inverse piezoelectric effect of utilizing piezoelectric ceramic; In elastomer, motivate the vibration in the supersonic range; Form particle movement at surface of elastomer specified point or specific region with particular track; And then through the friction between stator, the rotor coupling microscopic motion of particle is converted to the motor of the macroscopic motion of rotor; Advantages such as it has low speed high torque, need not gear, no electromagnetic interference, response speed is fast and cut off self-lock, as a kind of piezoelectric actuator, piezoelectric ultrasonic motor has very to be used widely.
Chinese patent " rectangular four-pin linear ultrasonic motor vibrator "; Publication number is CN101626205A; Open day is on January 13rd, 2010; Proposed a kind of new configuration of sandwich linear type ultrasound motor of enclosed construction first, it realizes four excitations that drive the elliptical orbit vibration of foot place through four longitudinal vibration transducers according to rectangular arrangement; But, there is tangible vibration coupling problem between the transducer in this kind ultrasonic motor oscillator, the actual vibration state of transducer is not single longitudinal vibration, but the complex vibration of a kind of longitudinal vibration and the curved stack of shaking; Wherein, longitudinal vibration is that the active excitation through piezoelectric ceramic piece produces, and curved shaking then is that coupling by between the adjacent transducer causes; This coupling is given birth to curved existence of shaking can make oscillator mode characteristic frequency depart from the single transducer resonance frequency, and can reduce the electromechanical conversion efficiency of oscillator, the raising of restriction oscillator machinery output characteristic.In addition, this coupling is given birth to curved existence of shaking makes four oscillation trajectories that drive the foot place have tangible inconsistency, also is unfavorable for the improvement of its output characteristic.
Summary of the invention
Give birth to the curved various adverse effects of shaking and being brought in order to solve the coupling that exists in the existing rectangular four-pin linear ultrasonic motor vibrator, the invention provides the embedded I shape four-pin linear ultrasonic motor vibrator of a kind of pottery.
The embedded I shape four-pin linear ultrasonic motor vibrator of pottery according to the invention, it comprises I shape metallic matrix, 12 pairs of piezoelectric ceramic pieces, 12 spring blocks, insulation spacer and 12 plate electrode sheets,
Said I shape metallic matrix is made up of two horizontal metal beams and vertical beams of metal; The horizontal metal beam is identical with the shape of vertical beams of metal; Wherein the horizontal metal beam is made up of beam body and two horn, and said beam body is that the cross section is circular or square cylinder, and the two ends of this beam body are fixedly connected horn respectively; This horn is that the cross section is circular or square and to its terminal tapered block, and the large end face of said horn is identical with the linkage interface shape of beam body; Vertically the small end face at beams of metal two ends is fixedly connected with the centre position of two horizontal metal beam medial surfaces respectively,
Be the mirror image symmetry on the medial surface of the beam body of each horizontal metal beam and the lateral surface and have four first rectangular through slot, and these four first rectangular through slot are the both sides that mirror image is symmetrically distributed in I shape metallic matrix center line; Vertically are the mirror image symmetry on the left surface of beams of metal and the right flank and have four second rectangular through slot, and these four second rectangular through slot are the both sides that mirror image is symmetrically distributed in the horizontal center line of vertical beams of metal,
A pair of piezoelectric ceramic piece and a spring block are set in each rectangular through slot; Said spring block is positioned at the outside of said a pair of piezoelectric ceramic piece; Between two piezoelectric ceramic pieces of every pair of piezoelectric ceramic piece a slice electrode slice is set, is provided with insulation spacer between piezoelectric ceramic piece in the bottom surface of each rectangular through slot and this rectangular through slot and the electrode slice.
The I shape metallic matrix of being made up of two horizontal metal beams and vertical beams of metal is an integral piece.
All piezoelectric ceramic pieces are all opposite along thickness direction; The polarised direction of two piezoelectric ceramic pieces is opposite in the every pair of piezoelectric ceramic piece; The polarised direction of adjacent two piezoelectric ceramic pieces of phase adjacency pair piezoelectric ceramic piece is opposite, and the polarised direction of the piezoelectric ceramic piece of relevant position is opposite on two horizontal metal beams.
The elastic telescopic direction of said spring block is the length direction of its place beams of metal.
It also comprises four friction plates, and said four friction plates are arranged at respectively on the both ends of the surface of two horizontal metal beams.
Said friction plate is the cross section and the identical block of end surface shape of its place horizontal metal beam.
Advantage of the present invention is: the present invention in use; Piezoelectric ceramic piece adopts amplitude to equate, frequency is oscillator self resonance frequency, phase difference is pressed signal for+90 ° two-phase alternating current and encouraged; Piezoelectric ceramic piece on its horizontal metal beam and the vertical beams of metal adopts the excitation of two phase voltages respectively; Utilize the stretching vibration of piezoelectric ceramic piece in oscillator, to motivate two mode of oscillations; These two mode of oscillations are superimposed upon four ends of horizontal metal beam; Promptly four drive the surperficial particles of foot and produce elliptical trajectories, drive foot and the mover that is positioned at its both sides when certain precompression contacts down when four, export through driving friction between foot and the mover macroscopic motion that can realize mover that is coupled.If the phase difference of adjustment excitation signals is-90 °, can realize reverse drive.Beams of metal adopts the variable cross-section design can play the effect of amassing wealth by heavy taxation of vibrational energy, can improve the amplitude and the vibration velocity that drive the surperficial particle of foot, makes and adopts the motor performance of this oscillator to be improved.Four drive foot and participate in simultaneously driving, and can significantly improve the mechanical fan-out capability of motor, and this oscillator made full use of the energy that vibration produces, and can effectively improve delivery efficiency.
Motor oscillator according to the invention adopts I shape and pottery to embed structure combining and has realized the four-footed driving, makes that its structure is greatly simplified, and is convenient to realize the microminiaturization of oscillator, also greatly the simplification of degree processing and assembly technology; Vertically beams of metal and horizontal metal beam binding site are positioned at the nodal section place of horizontal metal beam longitudinal vibration Mode Shape; Make the horizontal metal beam when longitudinal vibration, can not produce vibration coupling to vertical beams of metal; Thereby effectively reduced the vibration coupling problem that exists in the oscillator; The vibrational state that has guaranteed vertical beams of metal is single extensional vibration, can effectively improve the consistency of the terminal drive area of two horizontal metal beams particle vibration track.Therefore, the present invention effectively overcome exist in the existing rectangular four-pin linear ultrasonic motor vibrator give birth to the curved various adverse effects of shaking and being brought by vibration coupling and coupling.
But that the present invention has is simple in structure, the advantage of flexible design, processing and the simple producing in serial form of assembling.
Description of drawings
Fig. 1 is a cross-sectional view of the present invention;
Fig. 2 is a perspective view of the present invention;
Fig. 3 is the perspective view of I shape metallic matrix;
Fig. 4 is the polarised direction sketch map of all piezoelectric ceramic pieces;
Fig. 5 is first fundamental vibration Mode Shape sketch map of motor oscillator according to the invention;
Fig. 6 is second fundamental vibration Mode Shape sketch map of motor oscillator according to the invention.
Embodiment
Embodiment one: this execution mode is described below in conjunction with Fig. 1 to Fig. 3; The embedded I shape four-pin linear ultrasonic motor vibrator of the said pottery of this execution mode; It comprises 2,12 spring blocks 3 of 1,12 pairs of piezoelectric ceramic pieces of I shape metallic matrix, insulation spacer 4 and 12 plate electrode sheets 5
Said I shape metallic matrix 1 is made up of two horizontal metal beam 1-1 and vertical beams of metal 1-2; Horizontal metal beam 1-1 is identical with the shape of vertical beams of metal 1-2; Wherein horizontal metal beam 1-1 is made up of beam body and two horn; Said beam body is that the cross section is circular or square cylinder; The two ends of this beam body are fixedly connected horn respectively, and this horn is that the cross section is circular or square and to its terminal tapered block, and the large end face of said horn is identical with the linkage interface shape of beam body; Vertically the small end face at beams of metal 1-2 two ends is fixedly connected with the centre position of two horizontal metal beam 1-1 medial surfaces respectively,
Be the mirror image symmetry on the medial surface of the beam body of each horizontal metal beam 1-1 and the lateral surface and have four first rectangular through slot 1-1-1, and these four first rectangular through slot 1-1-1 are the both sides that mirror image is symmetrically distributed in I shape metallic matrix 1 center line; Vertically are the mirror image symmetry on the left surface of beams of metal 1-2 and the right flank and have four second rectangular through slot 1-2-1, and these four second rectangular through slot 1-2-1 are the both sides that mirror image is symmetrically distributed in the horizontal center line of vertical beams of metal 1-2,
A pair of piezoelectric ceramic piece 2 and a spring block 3 are set in each rectangular through slot; Said spring block 3 is positioned at the outside of said a pair of piezoelectric ceramic piece 2; Between two piezoelectric ceramic pieces 2 of every pair of piezoelectric ceramic piece 2 a slice electrode slice 5 is set, is provided with insulation spacer 4 between piezoelectric ceramic piece 2 in the bottom surface of each rectangular through slot and this rectangular through slot and the electrode slice 5.
Two horizontal metal beam 1-1 arrange according to I shape with vertical beams of metal 1-2 in this execution mode; Said motor oscillator is when using; I shape metallic matrix 1 is connected with the common port of driving power, the electrode slice 5 in the middle of eight pairs of piezoelectric ceramic pieces 2 of being fixed on two horizontal metal beam 1-1 all with one mutually drive signal connect the electrode slices 5 that vertical beams of metal 1-2 goes up in the middle of four pairs of piezoelectric ceramic pieces 2 of fixing and all be connected with an other phase drive signal.
Said motor oscillator is when using; The stage casing part of vertical beams of metal 1-2 between four second rectangular through slot 1-2-1 can be set to two side-prominent stage casing beam 1-2-2; This stage casing beam 1-2-2 can be used for the installation of oscillator and fixes; Because this stage casing beam 1-2-2 is positioned at the node position of vertical beams of metal 1-2 longitudinal vibration Mode Shape, it is fixing faint to oscillator self vibration characteristics influence ten minutes with external member.
Embodiment two: below in conjunction with Fig. 1 to Fig. 3 this execution mode is described, this execution mode is for to the further specifying of execution mode one, and the I shape metallic matrix of being made up of two horizontal metal beam 1-1 and vertical beams of metal 1-2 1 is an integral piece.
Two horizontal metal beam 1-1 and vertical beams of metal 1-2 are integral part processing, can simplify processing and assembly technology, guarantee machining accuracy.
Embodiment three: this execution mode is described below in conjunction with Fig. 4; This execution mode is further specifying execution mode one or two; All piezoelectric ceramic pieces 2 are all opposite along thickness direction; The polarised direction of two piezoelectric ceramic pieces is opposite in the every pair of piezoelectric ceramic piece 2, and the polarised direction of adjacent two piezoelectric ceramic pieces of phase adjacency pair piezoelectric ceramic piece 2 is opposite, and the polarised direction of piezoelectric ceramic piece that two horizontal metal beam 1-1 go up relevant positions is opposite.
Embodiment four: this execution mode is for to the further specifying of execution mode one, two or three, and the elastic telescopic direction of said spring block 3 belongs to length direction of beams of metal for it.
The elastic telescopic direction of the described spring block 3 of this execution mode can realize compressing piezoelectric ceramic piece 2.
Embodiment five: describe below in conjunction with Fig. 1 and Fig. 2; This execution mode is further specifying execution mode one, two, three or four; This execution mode also comprises four friction plates 6, and said four friction plates 6 are arranged at respectively on the both ends of the surface of two horizontal metal beam 1-1.
The setting of friction plate 6 can be played the effect that increases coefficient of friction, improves resistance to wear.
Embodiment six: describe below in conjunction with Fig. 1 and Fig. 2, this execution mode is for to the further specifying of execution mode five, and said friction plate 6 is the cross section and the identical block of end surface shape of its place horizontal metal beam 1-1.
Fig. 5 and shown in Figure 6 is two fundamental vibration Mode Shape sketch mapes of oscillator of the present invention, and mode of oscillation shown in Figure 5 is the mode that two horizontal metal beam 1-1 longitudinal vibration is encouraged, and correspondence causes the vibration of two terminal particle along continuous straight runs of horizontal metal beam 1-1; Mode of oscillation shown in Figure 6 is the mode that vertical beams of metal 1-2 longitudinal vibration is encouraged, and correspondence causes the terminal particle vibration vertically of horizontal metal beam 1-1.
Claims (6)
1. embedded I shape four-pin linear ultrasonic motor vibrator of pottery, it comprises I shape metallic matrix (1), 12 pairs of piezoelectric ceramic pieces (2), 12 spring blocks (3), insulation spacer (4) and 12 plate electrode sheets (5), it is characterized in that:
Said I shape metallic matrix (1) is made up of two horizontal metal beams (1-1) and vertical beams of metal (1-2); Horizontal metal beam (1-1) is identical with the shape of vertical beams of metal (1-2); Wherein horizontal metal beam (1-1) is made up of beam body and two horn; Said beam body is that the cross section is circular or square cylinder; The two ends of this beam body are fixedly connected horn respectively, and this horn is that the cross section is circular or square and to its terminal tapered block, and the large end face of said horn is identical with the linkage interface shape of beam body; Vertically the small end face at beams of metal (1-2) two ends is fixedly connected with the centre position of two horizontal metal beams (1-1) medial surface respectively,
Be the mirror image symmetry on the medial surface of the beam body of each horizontal metal beam (1-1) and the lateral surface and have four first rectangular through slot (1-1-1), and these four first rectangular through slot (1-1-1) are the both sides that mirror image is symmetrically distributed in I shape metallic matrix (1) center line; Vertically are the mirror image symmetry on the left surface of beams of metal (1-2) and the right flank and have four second rectangular through slot (1-2-1), and these four second rectangular through slot (1-2-1) are the both sides that mirror image is symmetrically distributed in the horizontal center line of vertical beams of metal (1-2),
An a pair of piezoelectric ceramic piece (2) and a spring block (3) are set in each rectangular through slot; Said spring block (3) is positioned at the outside of said a pair of piezoelectric ceramic piece (2); Between two piezoelectric ceramic pieces (2) of every pair of piezoelectric ceramic piece (2) a slice electrode slice (5) is set, is provided with insulation spacer (4) between piezoelectric ceramic piece (2) in the bottom surface of each rectangular through slot and this rectangular through slot and the electrode slice (5).
2. the embedded I shape four-pin linear ultrasonic motor vibrator of pottery according to claim 1 is characterized in that: the I shape metallic matrix of being made up of two horizontal metal beams (1-1) and vertical beams of metal (1-2) (1) is an integral piece.
3. the embedded I shape four-pin linear ultrasonic motor vibrator of pottery according to claim 1; It is characterized in that: all piezoelectric ceramic pieces (2) are all opposite along thickness direction; The polarised direction of two piezoelectric ceramic pieces is opposite in every pair of piezoelectric ceramic piece (2); The polarised direction of adjacent two piezoelectric ceramic pieces of phase adjacency pair piezoelectric ceramic piece (2) is opposite, and the polarised direction of the piezoelectric ceramic piece of the last relevant position of two horizontal metal beams (1-1) is opposite.
4. the embedded I shape four-pin linear ultrasonic motor vibrator of pottery according to claim 1 is characterized in that: the elastic telescopic direction of said spring block (3) is the length direction of its place beams of metal.
5. according to claim 1,2, the embedded I shape four-pin linear ultrasonic motor vibrator of 3 or 4 described potteries, it is characterized in that: it also comprises four friction plates (6), and said four friction plates (6) are arranged at respectively on the both ends of the surface of two horizontal metal beams (1-1).
6. the embedded I shape four-pin linear ultrasonic motor vibrator of pottery according to claim 5 is characterized in that: said friction plate (6) is the end surface shape identical block of cross section with its place horizontal metal beam (1-1).
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| CN201110435876.5A CN102497132B (en) | 2011-12-22 | 2011-12-22 | Ceramic embedded I-shaped four-foot linear ultrasonic motor vibrator |
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| CN201110435876.5A CN102497132B (en) | 2011-12-22 | 2011-12-22 | Ceramic embedded I-shaped four-foot linear ultrasonic motor vibrator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516251A (en) * | 2013-09-27 | 2014-01-15 | 浙江工商大学 | Vertical-bending-twisting compound rotary type ultrasonic motor piezoelectric vibrator |
| CN105071692A (en) * | 2015-07-20 | 2015-11-18 | 哈尔滨工业大学 | Multi-working mode composite-type cantilever multi-leg piezoelectric actuator |
| CN105958861A (en) * | 2016-06-12 | 2016-09-21 | 吉林大学 | Piezoelectric motor equipped with half-falcate elastic bodies |
| CN109935223A (en) * | 2017-12-19 | 2019-06-25 | 北京长城电子装备有限责任公司 | A kind of super-small low frequencies energy converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201252496Y (en) * | 2008-08-08 | 2009-06-03 | 辽宁工业大学 | H-shaped stationary wave linear ultrasonic motor vibrator |
| CN101626203A (en) * | 2009-08-19 | 2010-01-13 | 哈尔滨工业大学 | Vibrator of beam type linear ultrasonic motor using bending vibration modes |
| CN102148586A (en) * | 2011-03-14 | 2011-08-10 | 南昌航空大学 | high-thrust piezoelectric linear motor driven by three-phase longitudinal vibration modality driven |
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2011
- 2011-12-22 CN CN201110435876.5A patent/CN102497132B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201252496Y (en) * | 2008-08-08 | 2009-06-03 | 辽宁工业大学 | H-shaped stationary wave linear ultrasonic motor vibrator |
| CN101626203A (en) * | 2009-08-19 | 2010-01-13 | 哈尔滨工业大学 | Vibrator of beam type linear ultrasonic motor using bending vibration modes |
| CN102148586A (en) * | 2011-03-14 | 2011-08-10 | 南昌航空大学 | high-thrust piezoelectric linear motor driven by three-phase longitudinal vibration modality driven |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516251A (en) * | 2013-09-27 | 2014-01-15 | 浙江工商大学 | Vertical-bending-twisting compound rotary type ultrasonic motor piezoelectric vibrator |
| CN105071692A (en) * | 2015-07-20 | 2015-11-18 | 哈尔滨工业大学 | Multi-working mode composite-type cantilever multi-leg piezoelectric actuator |
| CN105071692B (en) * | 2015-07-20 | 2017-03-01 | 哈尔滨工业大学 | Multi-operation mode compound cantilever polypody piezoelectric actuator |
| CN105958861A (en) * | 2016-06-12 | 2016-09-21 | 吉林大学 | Piezoelectric motor equipped with half-falcate elastic bodies |
| CN105958861B (en) * | 2016-06-12 | 2017-10-24 | 吉林大学 | A kind of piezo-electric motor with half-crescent shape elastomer |
| CN109935223A (en) * | 2017-12-19 | 2019-06-25 | 北京长城电子装备有限责任公司 | A kind of super-small low frequencies energy converter |
| CN109935223B (en) * | 2017-12-19 | 2021-04-20 | 北京长城电子装备有限责任公司 | Ultra-small-size low-frequency transmitting transducer |
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| CN102497132B (en) | 2015-03-11 |
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