CN102437783B - Surface mount type I-shaped four-footed linear ultrasonic motor vibrator - Google Patents
Surface mount type I-shaped four-footed linear ultrasonic motor vibrator Download PDFInfo
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- CN102437783B CN102437783B CN201110435858.7A CN201110435858A CN102437783B CN 102437783 B CN102437783 B CN 102437783B CN 201110435858 A CN201110435858 A CN 201110435858A CN 102437783 B CN102437783 B CN 102437783B
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Abstract
The invention relates to a surface mount type I-shaped four-footed linear ultrasonic motor vibrator, belonging to the technical field of piezoelectric ultrasonic motors. The surface mount type I-shaped four-footed linear ultrasonic motor vibrator provided by the invention eliminates various adverse impacts caused by coupling bending vibration in the traditional rectangular four-footed linear ultrasonic motor vibrator. Two end faces of a vertical beam of the vibrator are respectively provided with an amplitude transformer, binding site of the two amplitude transformers is a big end face of the amplitude transformer, the two end faces of a horizontal beam are respectively provided with one amplitude transformer, the binging site of the two amplitude transformers is the big end face of the amplitude transformer, the vertical beam is respectively fixedly connected with middle position of inner side walls of the two horizontal beams by virtue of small end faces of the two amplitude transformers of the two end faces of the vertical beam; the outer side wall, the upper side wall and the lower side wall of each horizontal beam are respectively provided with one piezoelectric ceramic wafer, one piezoelectric ceramic wafer is respectively arranged at the two sides of the amplitude transformer on the inner side wall of each horizontal beam, the upper side wall and the lower side wall of the vertical beam are respectively provided with one piezoelectric ceramic wafer, and the inner side wall and the outer side wall of the vertical beam are symmetrically provided with two piezoelectric ceramic wafers at the two sides of a thin walled beam. The surface mount type I-shaped four-footed linear ultrasonic motor vibrator provided by the invention can be applied to the field of manufacturing of ultrasonic motors.
Description
Technical field
The present invention relates to a kind of SMD I shape four-pin linear ultrasonic motor vibrator, belong to 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 supersonic range, form the particle movement with particular track at surface of elastomer specified point or specific region, and then be coupled and the microscopic motion of particle converted to the macroscopic motion of rotor by the friction between stator, rotor, there is low speed high torque, without gear, without electromagnetic interference, fast response time and the advantage such as cut off self-lock, have application very widely as a kind of piezoelectric actuator.
Within open day, be that January 13, publication number in 2010 are the patent application that CN101626205A, denomination of invention are " rectangular four-pin linear ultrasonic motor vibrator ", it has proposed a kind of new configuration of sandwich linear type ultrasound motor of enclosed construction first, realizes four excitations that drive the elliptical orbits vibration of foot place by four longitudinal vibration transducers according to rectangular arrangement; But, between the transducer in this ultrasonic motor oscillator, there is obvious vibration coupling problem, the actual vibration state of transducer is not single longitudinal vibration, but the complex vibration of a kind of longitudinal vibration and bending vibration stack; Wherein, longitudinal vibration is to produce by the Active spurring of piezoelectric ceramic piece, and bending vibration is to have the coupling between adjacent transducer to cause; The existence of the raw bending vibration of this coupling can make oscillator modal characteristics frequency departure single transducer resonance frequency, and can reduce the electromechanical conversion efficiency of oscillator, the raising of restriction oscillator machinery output characteristic.In addition, the existence of the raw bending vibration of this coupling makes four to drive the oscillation trajectory at foot place to have obvious inconsistency, is also unfavorable for the improvement of its output characteristic.In addition, adopt double-screw bolt pretension make this oscillator structure comparatively complicated, be difficult to realize microminiaturized, and this oscillator is high to assembly precision and each parts machining required precision, can cause cannot reach requirement time the larger internal stress of the inner existence of oscillator, piezoelectric ceramic precompression to apply the existence of the problem such as inhomogeneous at processing and assembly precision, thereby cause oscillator normally to work.
Summary of the invention
In order to solve the coupling existing in existing rectangular four-pin linear ultrasonic motor vibrator raw vibration, configuration complexity, be difficult to realize microminiaturization, processing and assembly precision to be required to harsh problem, the invention provides a kind of SMD I shape four-pin linear ultrasonic motor vibrator.
SMD I shape four-pin linear ultrasonic motor vibrator, comprises I shape metallic matrix and piezoelectric ceramic piece, I shape metallic matrix comprises two horizontal beams, a vertical beam, six ultrasonic transformers, two thin walled beams and two mount pads, described horizontal beam and vertical beam are all that cross section is the four prisms cylinder of rectangle, described each ultrasonic transformer is all that cross section is rectangle tapered four prisms cylinder, two end faces of vertical beam are respectively provided with a ultrasonic transformer, and the end face of described vertical beam and each ultrasonic transformer combination is the large end face of this ultrasonic transformer, two end faces of each horizontal beam are respectively provided with a ultrasonic transformer, and the end face that this horizontal beam is combined with each ultrasonic transformer is the large end face of this ultrasonic transformer, the small end face of two ultrasonic transformers of described vertical beam by being arranged on these vertical beam two ends is fixedly connected with the centre position of a sidewall of two horizontal beams respectively, described two horizontal beams are all vertical with described vertical beam and be positioned at same plane, the sidewall center, two of left and right of described vertical beam is symmetrically arranged with two thin walled beams, and the outside of each thin walled beam is provided with a mount pad, on the sidewall of horizontal beam and vertical beam, be provided with piezoelectric ceramic piece.
In lateral wall, upper side wall and the lower wall of each horizontal beam, be all provided with between two parties a slice piezoelectric ceramic piece, on the sidewall that each horizontal beam is connected with ultrasonic transformer, be provided with two piezoelectric ceramic pieces, and described two piezoelectric ceramic piece symmetries are positioned at the left and right sides of the junction of this horizontal beam and ultrasonic transformer, in the upper side wall of vertical beam and lower wall, be all provided with between two parties a slice piezoelectric ceramic piece, on the madial wall of vertical beam, lateral wall, be provided with two piezoelectric ceramic pieces, described two piezoelectric ceramic pieces are symmetricly set on the both sides of the thin walled beam on the sidewall of place.
Piezoelectric ceramic piece employing amplitude in SMD I shape four-pin linear ultrasonic motor vibrator of the present invention equates, frequency is that oscillator self resonance frequency, phase difference are the two-phase alternating current pressure signal excitation (piezoelectric ceramic piece on horizontal composite beam and vertical composite beam adopts respectively two-phase voltage drive) of+90 °, utilizes the stretching vibration of piezoelectric ceramic piece in oscillator, to motivate two mode of oscillations (two mode of oscillations of oscillator as shown in Figure 4 and Figure 5); The mode that wherein mode of oscillation shown in Fig. 4 encourages for two horizontal composite beam longitudinal vibrations, correspondence causes the vibration of level luffing bar end particle along continuous straight runs; The mode that mode of oscillation shown in Fig. 5 encourages for vertical composite beam longitudinal vibration, correspondence causes the vibration vertically of level luffing bar end particle), two mode of oscillations are superimposed upon four and drive the surperficial particle of foot (level luffing bar end is for driving foot) to produce elliptical trajectory, in the time driving foot and both sides mover to contact under certain precompression for four, export by the macroscopic motion that drives friction coupling between foot and mover to realize mover.If adjusting the phase difference of excitation signals is-90 °, can realize reverse drive.Ultrasonic transformer adopts variable cross-section design to 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, and motor performance is improved.Four drive foot to participate in driving simultaneously, can significantly improve the mechanical fan-out capability of motor, and this oscillator energy that taken full advantage of generation of vibration, can effectively improve delivery efficiency.
SMD I shape four-pin linear ultrasonic motor vibrator of the present invention has been given up the enclosed construction proposing in the patent application of denomination of invention for " rectangular four-pin linear ultrasonic motor vibrator ", adopt the mode of integrated I shape metallic matrix and piezoelectric ceramic bonding to encourage, owing to having given up double-screw bolt firmly beforehand means, structure is greatly simplified, be convenient to realize the microminiaturization of oscillator, also greatly the simplification of degree processing and assembly technology; The integral structure of metallic matrix has avoided oscillator inside in double-screw bolt firmly beforehand means to have the problem of internal stress, and the bonding mode adopting between metallic matrix and piezoelectric ceramic has avoided piezoelectric ceramic precompression to apply inhomogeneous problem; Vertically composite beam and horizontal composite beam binding site are positioned at the nodal section place of horizontal composite beam longitudinal vibration Mode Shape, make horizontal composite beam can not produce vibration coupling to vertical composite beam in the time of longitudinal vibration, thereby effectively reduce the vibration coupling problem existing in oscillator, the vibrational state that ensures vertical composite beam is single extensional vibration, can effectively improve the consistency of four level luffing bar end drive area particle vibration tracks.Therefore, patch type of the present invention successfully overcome rectangular four-pin linear ultrasonic motor vibrator configuration complexity, there is the raw vibration of coupling, be difficult to realize microminiaturized, to problems such as processing and assembly precision requirement harshnesses.
That SMD I shape four-pin linear ultrasonic motor vibrator of the present invention has advantages of is simple in structure, flexible design, processing and assembling is simple, can producing in serial form.
Brief description of the drawings
Fig. 1 is the vertical view of SMD I shape four-pin linear ultrasonic motor vibrator of the present invention; Fig. 2 is the perspective view of the oscillator shown in Fig. 1; Fig. 3 is the perspective view of the I shape metallic matrix in the oscillator shown in Fig. 1; Fig. 4 and Fig. 5 are two fundamental vibration Mode Shape schematic diagrames of the oscillator shown in Fig. 1.
Embodiment
Embodiment one, in conjunction with Fig. 1 to Fig. 3, present embodiment is described, the SMD I shape four-pin linear ultrasonic motor vibrator described in present embodiment, comprises I shape metallic matrix 1 and piezoelectric ceramic piece 2, I shape metallic matrix 1 comprises two horizontal beam 1-1, a vertical beam 1-2, six ultrasonic transformer 1-3, two thin walled beam 1-4 and two mount pad 1-5, described horizontal beam 1-1 and vertical beam 1-2 are all that cross section is the four prisms cylinder of rectangle, described each ultrasonic transformer 1-3 is all that cross section is rectangle tapered four prisms cylinder, two end faces of vertical beam 1-2 are respectively provided with a ultrasonic transformer 1-3, and the end face of described vertical beam 1-2 and each ultrasonic transformer 1-3 combination is the large end face of this ultrasonic transformer 1-3, two end faces of each horizontal beam 1-1 are respectively provided with a ultrasonic transformer 1-3, and the end face that this horizontal beam 1-1 is combined with each ultrasonic transformer 1-3 is the large end face of this ultrasonic transformer 1-3, the small end face of two the ultrasonic transformer 1-3s of described vertical beam 1-2 by being arranged on this vertical beam 1-2 two ends is fixedly connected with the centre position of a sidewall of two horizontal beam 1-1 respectively, described two horizontal beam 1-1 are all vertical with described vertical beam 1-2 and be positioned at same plane, the sidewall center, two of left and right of described vertical beam 1-2 is symmetrically arranged with two thin walled beam 1-4, and the outside of each thin walled beam 1-4 is provided with a mount pad 1-5, on the sidewall of horizontal beam 1-1 and vertical beam 1-2, be provided with piezoelectric ceramic piece 2.
Embodiment two, the difference of the SMD I shape four-pin linear ultrasonic motor vibrator described in present embodiment and embodiment one is, the lateral wall of each horizontal beam 1-1, in upper side wall and lower wall, be all provided with between two parties a slice piezoelectric ceramic piece 2, on the sidewall that each horizontal beam 1-1 is connected with ultrasonic transformer 1-3, be provided with two piezoelectric ceramic pieces 2, and described two piezoelectric ceramic piece 2 symmetries are positioned at the left and right sides of the junction of this horizontal beam 1-1 and ultrasonic transformer 1-3, in the upper side wall of vertical beam 1-2 and lower wall, be all provided with between two parties a slice piezoelectric ceramic piece 2, the madial wall of vertical beam 1-5, on lateral wall, be provided with two piezoelectric ceramic pieces 2, described two piezoelectric ceramic pieces 2 are symmetricly set on the both sides of the thin walled beam 1-4 on the sidewall of place.
The SMD I shape four-pin linear ultrasonic motor vibrator of present embodiment is in application, I shape metallic matrix 1 is connected with the common port of driving power, the lateral electrode face of ten piezoelectric ceramic pieces 2 being fixed on two horizontal beam 1-1 all drives signal to be connected with one mutually, and the lateral electrode face of six piezoelectric ceramic pieces 2 vertically being fixed on beams of metal 1-2 all drives signal to be connected with other one mutually.
The SMD I shape four-pin linear ultrasonic motor vibrator of present embodiment is in application, and thin walled beam 1-4 is arranged on the node position of vertical composite beam longitudinal vibration Mode Shape, can play the effect of elastic bearing and vibration isolation; Mount pad 1-5 can be used for the installation of oscillator and fixes, and itself and the fixing of external member affect very faint on oscillator self vibration characteristics.
The difference of the SMD I shape four-pin linear ultrasonic motor vibrator described in embodiment three, present embodiment and embodiment one is, I shape metallic matrix 1 is integrated part, can simplify processing and assembly technology, guarantee machining accuracy.
The difference of the SMD I shape four-pin linear ultrasonic motor vibrator described in embodiment four, present embodiment and embodiment one is, it also comprises four friction plates 3, on the small end face of the ultrasonic transformer 1-3 of two horizontal beam 1-1 ends, all have a rectangular recess, this groove runs through place small end face; Friction plate 3 is fixed on the end of ultrasonic transformer 1-2 by described groove.The setting of friction plate 3 can be played the effect that increases coefficient of friction, improves resistance to wear.
The difference of the SMD I shape four-pin linear ultrasonic motor vibrator described in embodiment five, present embodiment and embodiment four is, friction plate 3 covers the small end face of ultrasonic transformer 1-3 completely.
The difference of the SMD I shape four-pin linear ultrasonic motor vibrator described in embodiment six, present embodiment and embodiment one is, piezoelectric ceramic piece 2 is fixedly connected with the sidewall of horizontal beam 1-1 or vertical beam 1-2 by bonding mode, all piezoelectric ceramic piece 2 through-thickness polarization.
Claims (5)
1. SMD I shape four-pin linear ultrasonic motor vibrator, comprises I shape metallic matrix (1) and piezoelectric ceramic piece (2); it is characterized in that: I shape metallic matrix (1) comprises two horizontal beams (1-1), a vertical beam (1-2), six ultrasonic transformers (1-3), two thin walled beams (1-4) and two mount pads (1-5), described horizontal beam (1-1) and vertical beam (1-2) are all that cross section is the four prisms cylinder of rectangle, described each ultrasonic transformer (1-3) is all that cross section is rectangle tapered four prisms cylinder, two end faces of vertical beam (1-2) are respectively provided with a ultrasonic transformer (1-3), and the end face of described vertical beam (1-2) and each ultrasonic transformer (1-3) combination is the large end face of this ultrasonic transformer (1-3), two end faces of each horizontal beam (1-1) are respectively provided with a ultrasonic transformer (1-3), and the end face of this horizontal beam (1-1) and each ultrasonic transformer (1-3) combination is the large end face of this ultrasonic transformer (1-3), the small end face of two ultrasonic transformers (1-3) of described vertical beam (1-2) by being arranged on this vertical beam (1-2) two ends is fixedly connected with the centre position of a sidewall of two horizontal beams (1-1) respectively, described two horizontal beams (1-1) are all vertical with described vertical beam (1-2) and be positioned at same plane, the sidewall center, two of left and right of described vertical beam (1-2) is symmetrically arranged with two thin walled beams (1-4), and the outside of each thin walled beam (1-4) is provided with a mount pad (1-5), on the sidewall of horizontal beam (1-1) and vertical beam (1-2), be provided with piezoelectric ceramic piece (2),
I shape metallic matrix (1) is integrated part.
2. SMD I shape four-pin linear ultrasonic motor vibrator according to claim 1, it is characterized in that the lateral wall of each horizontal beam (1-1), in upper side wall and lower wall, be all provided with between two parties a slice piezoelectric ceramic piece (2), on the sidewall that each horizontal beam (1-1) is connected with ultrasonic transformer (1-3), be provided with two piezoelectric ceramic pieces (2), and described two piezoelectric ceramic pieces (2) symmetry is positioned at the left and right sides of the junction of this horizontal beam (1-1) and ultrasonic transformer (1-3), in the upper side wall of vertical beam (1-2) and lower wall, be all provided with between two parties a slice piezoelectric ceramic piece (2), on two of the left and right sidewall of vertical beam (1-2), be provided with two piezoelectric ceramic pieces (2), described two piezoelectric ceramic pieces (2) are symmetricly set on the both sides of the thin walled beam (1-4) on the sidewall of place.
3. SMD I shape four-pin linear ultrasonic motor vibrator according to claim 1, it is characterized in that it also comprises four friction plates (3), on the small end face of the ultrasonic transformer (1-3) of two horizontal beams (1-1) end, all have a rectangular recess, this groove runs through place small end face; Friction plate (3) is fixed on the end of ultrasonic transformer (1-2) by described groove.
4. SMD I shape four-pin linear ultrasonic motor vibrator according to claim 3, is characterized in that friction plate (3) covers the small end face of ultrasonic transformer (1-3) completely.
5. SMD I shape four-pin linear ultrasonic motor vibrator according to claim 1, it is characterized in that piezoelectric ceramic piece (2) is fixedly connected with the sidewall of horizontal beam (1-1) or vertical beam (1-2) by bonding mode, the polarization of all piezoelectric ceramic pieces (2) through-thickness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110435858.7A CN102437783B (en) | 2011-12-22 | 2011-12-22 | Surface mount type I-shaped four-footed linear ultrasonic motor vibrator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110435858.7A CN102437783B (en) | 2011-12-22 | 2011-12-22 | Surface mount type I-shaped four-footed linear ultrasonic motor vibrator |
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| CN102437783A CN102437783A (en) | 2012-05-02 |
| CN102437783B true CN102437783B (en) | 2014-10-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103795290A (en) * | 2014-01-27 | 2014-05-14 | 哈尔滨工业大学 | Patch type longitudinal vibration composite single-foot piezoelectric ultrasonic motor oscillator |
| CN103746598A (en) * | 2014-01-27 | 2014-04-23 | 哈尔滨工业大学 | Paster longitudinal vibration composite dual-feet piezoelectric supersonic motor vibrator |
| CN103746597B (en) * | 2014-01-27 | 2017-03-01 | 哈尔滨工业大学 | SMD T-shaped dual-feet linear piezoelectric supersonic motor vibrator |
| CN104967355B (en) * | 2015-07-20 | 2017-03-01 | 哈尔滨工业大学 | Simulating crawling polypody linear piezoelectric actuator |
| CN114244183B (en) * | 2021-12-25 | 2023-08-15 | 西安交通大学 | X-shaped structure resonance type piezoelectric actuator capable of being driven in two directions and actuating method thereof |
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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 |
| CN101626203B (en) * | 2009-08-19 | 2011-07-20 | 哈尔滨工业大学 | Vibrator of beam type linear ultrasonic motor using bending vibration modes |
| CN101626204B (en) * | 2009-08-25 | 2011-06-01 | 哈尔滨工业大学 | U-type double-pin linear ultrasonic motor vibrator |
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