CN206004554U - Traveling Ultrasonic motor stator and the motor of the Traveling Ultrasonic motor stator is set - Google Patents

Abstract

The utility model is related to driving means field，Specifically related to a kind of Traveling Ultrasonic motor stator and the motor of the Traveling Ultrasonic motor stator is set，The motor includes the bearing for being sheathed on rotating shaft successively、Rotor、Frictional layer and Traveling Ultrasonic motor stator，And it is arranged on upper lid and the lower cover at rotating shaft two ends，Above-mentioned Traveling Ultrasonic motor stator includes stator，The side of stator includes the first arcuate segments、Second arcuate segments、3rd arcuate segments and the 4th arcuate segments，Draw-in groove on first arcuate segments and the 3rd arcuate segments，The piezoelectric ceramics of the multiple piezoelectric ceramic pieces stacking being embedded in draw-in groove，Stator is towards the comb of the side of rotor，Piezoelectric ceramics be respectively provided on two sides with first electrode and second electrode，There is gap between two piezoelectric ceramic pieces，The 3rd electrode electrically connected with first electrode and the 4th electrode electrically connected with second electrode is respectively equipped with two above-mentioned gaps，The motor is using the piezoelectric ceramics arranged on stator，Improve output torque and the service life of motor.

Description

Traveling Ultrasonic motor stator and the motor of the Traveling Ultrasonic motor stator is set

Technical field

The utility model is related to driving means field, in particular to a kind of Traveling Ultrasonic motor stator and setting The motor of the Traveling Ultrasonic motor stator.

Background technology

Ultrasonic motor be a kind of external last century the eighties grow up new for motor, it be a kind of will pressure The microscopic vibration that electroceramics inverse piezoelectric effect is excited as driving force, the conversion by multiple vibration modes with couple, make electric energy It is transformed into the driving means of mechanical energy.The structure of traditional Traveling Ultrasonic motor is actually similar, and form is simple, at present should be With one of widest ultrasonic motor.

Traditional travelling-wave-type ultrasonic motor, the polarised direction of the piezoelectric ceramics for using is d31 piezoelectricity direction.Piezoelectric ceramics It is made as annular wafer and surface of the stator away from rotor is close to, whole piezoelectric ceramics works in d31 piezoelectric modulus direction, in electricity The lower generation face of excitation in telescopic displacement, although however, piezoelectric ceramics has measuring body ability well, existing The resistance to tension of piezoelectric ceramics is poor, i.e., the tension that existing piezoelectric ceramics can bear is very weak.According to related fatigue test As shown by data, the damage of traveling wave type ultrasonic motor, main cause are because that piezoelectric ceramics is operationally alternately born always Tension and compression causes, and the stator in prior art in traveling wave type ultrasonic motor is relatively thin, runs into shock and vibration Situations such as all larger deformation may occur, if the frequency of shock and vibration is in the vicinity of its characteristic frequency, then the shape of generation Becoming will be bigger, thus easily the piezoelectric ceramic thin sheet for being close to stator side can shake small crackle, cause whole machine Hydraulic performance decline or failure.

Utility model content

The purpose of this utility model is to provide a kind of Traveling Ultrasonic motor stator, and which arranges pressure in the draw-in groove of stator Electroceramics, can significantly increase the output torque of motor；The piezoelectric ceramics is not easy crackle occur, improves the setting traveling wave The service life of the motor of ultrasonic motor stator；While piezoelectric ceramics telescopic direction piezoelectric ceramic piece stacking vertical Direction, substantially, the voltage of work reduces action effect on the contrary, and this requirement to supporting drive circuit is also just reduced.

Another object of the present utility model is to provide a kind of motor for being provided with above-mentioned Traveling Ultrasonic motor stator, its Can be using the performance and used life of the Traveling Ultrasonic motor stator lifting motor being disposed therein itself；Can also reduce Operating voltage so that the voltage request of the drive circuit of motor is also reduced accordingly.

Embodiment of the present utility model is realized in：

A kind of Traveling Ultrasonic motor stator, it include stator and multiple piezoelectric ceramics, and the side of stator is provided with comb, The opposite side relative with comb side is arranged of stator includes the first arcuate segments, the second arcuate segments, the 3rd arcuate segments and the 4th arc Shape area, the first arcuate segments and the 3rd arcuate segments are symmetricly set in the both sides of the central shaft of stator, the first arcuate segments and the 3rd arc Area is provided with multiple draw-in grooves, and multiple piezoelectric ceramics are embedded at draw-in groove one by one, and the opposite sides of piezoelectric ceramics is provided with the first electricity Pole and second electrode, piezoelectric ceramics include the multiple piezoelectric ceramic pieces for stacking gradually, and are formed between two adjacent piezoelectric ceramic pieces Gap, two adjacent gaps are respectively provided with the 3rd electrode and the 4th electrode, and the 3rd electrode is electrically connected with first electrode, the 4th electricity Pole is electrically connected with second electrode.

In the utility model preferred embodiment, above-mentioned first electrode is arranged at central shaft of the piezoelectric ceramics towards stator Side, second electrode is arranged at side of the piezoelectric ceramics away from the central shaft of stator.

In the utility model preferred embodiment, above-mentioned multiple piezoelectric ceramics include the first piezoelectric ceramics and the second piezoelectricity Pottery, circumference of multiple draw-in grooves respectively along the first arcuate segments and the 3rd arcuate segments are uniformly distributed, and multiple draw-in grooves include at least one Pocket set, the first arcuate segments and the 3rd arcuate segments are respectively provided with least one pocket set, and each pocket set includes four draw-in grooves, at least Multiple draw-in grooves alternating in one pocket set is embedded the first piezoelectric ceramics and the second piezoelectric ceramics.

In the utility model preferred embodiment, the quantity of the pocket set of above-mentioned first arcuate segments and the 3rd arcuate segments is equal For one.

In the utility model preferred embodiment, above-mentioned first electrode and second electrode are the phase for being coated on piezoelectric ceramics To both sides conductive silver layer.

In the utility model preferred embodiment, above-mentioned 3rd electrode and the 4th electrode are for being coated on two adjacent segments Interior conductive silver layer.

In the utility model preferred embodiment, above-mentioned comb is uniformly distributed along the circumference of stator.

In the utility model preferred embodiment, above-mentioned second arcuate segments and arc of the 4th arcuate segments on same circumference Long ratio is 3:1.

A kind of motor, it include lid, bearing, lower cover, rotating shaft, rotor and above-mentioned Traveling Ultrasonic motor stator, on State bearing and lid be connected to, the two ends of rotating shaft are rotated with bearing and lower cover respectively and are connected, and rotor and stator are sheathed on rotating shaft successively, Rotor is located at the side of the close bearing of stator, and rotor is additionally provided with frictional layer near the side of stator, stator be provided with comb The side of tooth is towards rotor.

In the utility model preferred embodiment, above-mentioned upper lid also include elastic component, elastic component be sheathed on rotating shaft and Positioned at bearing near the side of rotor.

The beneficial effect of the utility model embodiment is：The Traveling Ultrasonic of the utility model offer is provided in the motor Piezoelectric ceramics is arranged at the first arcuate segments of stator and the card of the 3rd arcuate segments for motor stator, the Traveling Ultrasonic motor stator In groove, the operative orientation of the piezoelectric ceramics is not to be close to stator surface tangentially to stretch, but the draw-in groove face of vertical stator is stretched, can To significantly increase the output torque of motor；The piezoelectric ceramics is formed by multiple piezoelectric ceramic pieces stacking, when stator is vibrated, When impact is deformed upon, piezoelectric ceramics is not easy crackle occur, improves the motor of the setting Traveling Ultrasonic motor stator Service life；Meanwhile, piezoelectric ceramics is formed using multilayer piezoelectric ceramic piece stacking sintering, although thickness increased, but work The voltage of work reduces on the contrary so that the voltage request of the drive circuit of motor is also reduced accordingly.

Description of the drawings

In order to be illustrated more clearly that the technical scheme of the utility model embodiment, below will be to using needed for embodiment Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should be by Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also To obtain other related accompanying drawings according to these accompanying drawings.

The fractionation structural representation of the motor that Fig. 1 is provided for the utility model embodiment；

Fig. 2 is the schematic diagram of Traveling Ultrasonic motor stator in the utility model embodiment；

Fig. 3 is the profile of Traveling Ultrasonic motor stator in the utility model embodiment；

Fig. 4 is the schematic diagram of piezoelectric ceramics in the utility model embodiment.

Icon：100- motor；Cover on 110-；120- bearing；130- lower cover；140- rotating shaft；150- rotor；160- rubs Layer；170- elastic component；200- Traveling Ultrasonic motor stator；210- stator；220- piezoelectric ceramics；221- piezoelectric ceramic piece； 230- comb；240- draw-in groove；250- first electrode；260- second electrode；The 3rd electrode of 270-；The 4th electrode of 280-；310- One arcuate segments；The second arcuate segments of 320-；The 3rd arcuate segments of 330-；The 4th arcuate segments of 340-.

Specific embodiment

Purpose, technical scheme and advantage for making the utility model embodiment is clearer, new below in conjunction with this practicality Accompanying drawing in type embodiment, is clearly and completely described to the technical scheme in the utility model embodiment, it is clear that retouched The embodiment that states is a part of embodiment of the utility model, rather than whole embodiments.Generally described in accompanying drawing herein and The component of the utility model embodiment for illustrating can be arranged and be designed with a variety of configurations.

Therefore, the detailed description of embodiment of the present utility model below to providing in the accompanying drawings is not intended to limit requirement The scope of the present utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model Embodiment, the every other embodiment obtained under the premise of creative work is not made by those of ordinary skill in the art, all Belong to the scope of the utility model protection.

It should be noted that：Similar label and letter represent similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined in individual accompanying drawing, then which need not be defined further and explain in subsequent accompanying drawing.

In description of the present utility model, it should be noted that term " " center ", " on ", D score, "left", "right", " perpendicular Directly ", the orientation of instruction such as " level ", " interior ", " outward " or position relationship be based on orientation shown in the drawings or position relationship, or The utility model product using when the orientation usually put or position relationship, be for only for ease of description the utility model and letter Change description, rather than indicate or the hint device of indication or element must with specific orientation, with specific azimuth configuration and Operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second ", " the 3rd " etc. are only used for area Divide description, and it is not intended that indicating or hint relative importance.

In description of the present utility model, in addition it is also necessary to which explanation, unless otherwise clearly defined and limited, term " sets Put ", " installation ", should be interpreted broadly " being connected ", " connection ", for example, it may be fixedly connected, or be detachably connected, Or be integrally connected；Can be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to by intermediary It is indirectly connected to, can is the connection of two element internals.For the ordinary skill in the art, can be managed with concrete condition Solve concrete meaning of the above-mentioned term in the utility model.

Embodiment

Fig. 1 is refer to, the present embodiment provides a kind of motor 100, the motor 100 includes lid 110, bearing 120, lower cover 130th, rotating shaft 140, rotor 150 and Traveling Ultrasonic motor stator 200.

The position at the center of the upper lid 110 of motor 100 is provided with a circular groove, and above-mentioned circular groove is used for arranging bearing 120, axle The center for holding 120 opens up a circular hole, and above-mentioned circular hole is used for arranging rotating shaft 140.Rotating shaft 140 is rotationally connected with bearing 120, is protected The normal rotation under rotating shaft 140 is in working order demonstrate,proved.

Rotating shaft 140 is arranged with rotor 150, Traveling Ultrasonic motor stator 200 and lower cover successively near one end of bearing 120 130, the central part of lower cover 130 offers a through hole, and rotating shaft 140 through the through hole of lower cover 130 and can stretch out the through hole.On Lid 110 has an inner chamber, and above-mentioned bearing 120, rotor 150, Traveling Ultrasonic motor stator 200 and rotating shaft 140 are not extended out The part of lower cover 130 is may be contained within the inner chamber of above-mentioned upper lid 110, and the surrounding of upper lid 110 is provided with multiple screws and lower cover 130 are provided with fixing hole corresponding with above-mentioned screw, and the inwall of screw and fixing hole is provided with internal thread, by bearing 120, turn After sub 150 and Traveling Ultrasonic motor stator 200 etc. are provided with, can achieve through each screw and fixing hole with screw whole The assembling of individual motor 100.

Preferably, in the present embodiment screw and the quantity of fixing hole are four, and are uniformly arranged on lid 110 With the surrounding of lower cover 130, the set-up mode of above-mentioned screw and fixing hole, fixing firm degree is effectively improved, drops again The operation that low motor 100 is produced.

Elastic component 170 is additionally provided with rotor 150 near the side of bearing 120, can be made by the setting of elastic component 170 Rotor 150 is more tight with the contact of Traveling Ultrasonic motor stator 200, is conducive to lifting the work effect of 100 entirety of motor Rate.

Above-mentioned elastic component 170 can have resilient element for butterfly spring or spring etc., use butterfly in the present embodiment Spring, compared to having the advantage that for spring, the load that butterfly spring is born in less space is bigger compared with for spring for butterfly spring, While which has variation rigidity characteristic, i.e., by changing truncated cone height and the ratio of thickness in butterfly spring piece, different bullets can be obtained Spring characteristic curve, can also obtain variation rigidity characteristic by the combination of different-thickness butterfly spring piece or by various combination mode.

The connected mode of rotating shaft 140 and rotor 150 includes for rotor 150 to be directly sleeved on rotating shaft by the through hole at center Rotating shaft 140 is fixed on 140, by rotor field spider, welds radial muscle make support again by 150 center of rotor in rotating shaft 140 Through hole is sheathed on radial muscle etc., while rotor 150 is connected necessary reliability with rotating shaft 140, could effectively transmit torque, rotor 150 Include bonded and interference fit etc. with the fastening form of rotating shaft 140, and in ultrahigh speed electricity rotating shaft, because the raising of rotating speed, So the requirement for dynamic balance of part is very high on countershaft 140, the connected mode of the rotor 150 such as bonded and rotating shaft 140 is all not It is suitable for, and adopts dismountable ladder interference to connect.

Preferably, the rotating shaft 140 of the present embodiment and the connected mode of rotor 150 are connected using interference, and it is excellent that interference connects Point is main as follows, and interference connection will not produce bending and distorting stress in rotating shaft 140, and the running accuracy of countershaft 140 will not Produce impact；Interference connection is easier to ensure that the perpendicularity of part positioning end and axial line, makes the rotating shaft 140 will not be because in pretension The service life of rotating shaft 140 is affected for 140 unbalance stress of rotating shaft；The uniform quality of interference set, 140 dynamic balancing of rotating shaft is easy to be obtained To guarantee；The general installation for being carried out interference fit using hot jacket method, is dismantled with the method for injection pressure oil, countershaft 140 Infringement is not produced；The positioning reliability of interference fit, can effectively improve the rigidity of rotating shaft 140.

Rotor 150 and Traveling Ultrasonic motor stator 200 are fitted, and paste in rotor 150 and Traveling Ultrasonic motor stator 200 Between conjunction face, frictional layer 160 is additionally provided with rotor 150, i.e., is contacted in rotor 150 and Traveling Ultrasonic motor stator 200 One layer of friction material is covered with face.Because ultrasonic motor 100 is to rely on friction coupling to transmit power, the mill of frictional interface Damage and fatigue is inevitable, this greatly have impact on the service life of ultrasonic motor 100 and application, so friction Layer 160 is reasonably provided with the prolongation of service life and the extension of application beneficial to motor 100.

Specifically, the friction material of frictional layer 160 can select polymer-based friction material, ceramic coating friction material, Powder metallurgy friction material, coat of metal friction material etc..Wherein, the matrix of polymer-based friction material is divided into asphalt mixtures modified by epoxy resin again Fat, phenolic resin, polytetrafluoroethylene (PTFE), polyimides, neoprene, nitrile rubber etc..

Preferably, the epoxy resin base frication material in polymer-based friction material, the ring are used in the present embodiment The advantage of epoxy resin-based friction material includes：Good surface cohesive force and cohesive force；Good wearability；Cost of manufacture is relatively Low；It is more easily adapted to conform to the preparation of various ultrasonic motors 100.

Fig. 2, Fig. 3 and Fig. 4 is refer to, Traveling Ultrasonic motor stator 200 includes stator 210, comb 230 and multiple piezoelectricity Pottery 220, stator 210 includes the first arcuate segments 310, the second arcuate segments 320, the 3rd arcuate segments 330 away from the side of rotor 150 With the 4th arcuate segments 340, the first arcuate segments 310 and the 3rd arcuate segments 330 are symmetricly set in the both sides of the central shaft of stator 210. Piezoelectric ceramics 220 includes the first piezoelectric ceramics and the second piezoelectric ceramics, and 4 draw-in grooves 240 constitute a pocket set, the first arc Shape area 310 and the 3rd arcuate segments 330 are respectively provided with a pocket set, 4 cards in the first arcuate segments 310 and the 3rd arcuate segments 330 Groove 240 is all circumferentially equally distributed, i.e., along the circumferentially disposed of stator 210.Piezoelectric ceramics 220 in each pocket set Distribution is the first piezoelectric ceramics and the second piezoelectric ceramics is alternately arranged.

First electrode 250 and second electrode are respectively arranged with two relative side walls of above-mentioned piezoelectric ceramics 220 260, first electrode 250 is arranged at piezoelectric ceramics 220 towards the side of the central shaft of said stator 210, and second electrode 260 is arranged In piezoelectric ceramics 220 away from the central shaft of said stator 210 side.

Preferably, the difficulty of the first piezoelectric ceramics and the second piezoelectric ceramics is installed, while to the greatest extent in order to reduce workman further Possible the first piezoelectric ceramics and the second piezoelectric ceramics for avoiding installation error, the first arcuate segments 310 and the 3rd arcuate segments 330 is made pottery The alternating of porcelain is installed with the central shaft of stator 210 symmetrically.Meanwhile, the mounting means of piezoelectric ceramics 220 is first will by external force Draw-in groove 240 is strutted slightly, being passed through the contrary electric signal of direction of an electric field and 220 polarised direction of piezoelectric ceramics to piezoelectric ceramics 220, Shrink piezoelectric ceramics 220, the piezoelectric ceramics 220 of contraction state is put in draw-in groove 240, when the assembling of piezoelectric ceramics 220 is completed Afterwards, in the case of not having to be energized, the side wall of draw-in groove 240 plays the role of compression to piezoelectric ceramics 220, and above-mentioned mounting means makes pressure The main compression chord in off working state and working condition of electroceramics 220, can effectively increase the longevity of piezoelectric ceramics 220 Life, so as to improve the life-span of motor 100.

It should be noted that corresponding to the installation number of above-mentioned piezoelectric ceramics 220 be B03 operation mode when excite Wavelength, when the bigger stator of diameter 210 is needed, the operation mode of selection B05, B07 or higher that can be relative, phase The quantity for increasing piezoelectric ceramics 220 and pocket set that answers.

The arc length ratio of second arcuate segments 320 and the 4th arcuate segments 340 on same circumference is 3:1, i.e., in the circle of stator 210 On side face, the circumference arc length on the periphery of the second arcuate segments 320 is equal to the circumference arc length on the periphery of the 4th arcuate segments 340 3 times, and preferably, the arc length of the second arcuate segments 320 is equal to 3/4ths of traveling wave wavelength under operation mode, the The arc length of four arcuate segments 340 is equal to a quarter of the traveling wave wavelength under operation mode.The 4th above-mentioned arcuate segments 340 are orphan Polar region, is sensor regions, and the area can be produced in real time using the direct piezoelectric effect of piezoelectric ceramics 220 reflects shaking for stator 210 Emotionally the voltage signal of condition, can be used for, as FD feed, the drift that control system judges resonance point by the use of the voltage signal.

Fig. 4 is refer to, above-mentioned piezoelectric ceramics 220 stacks sintering by multiple piezoelectric ceramic pieces 221 and forms, adjacent Gap is formed between two piezoelectric ceramic pieces 221, between two adjacent gaps, be respectively arranged with the 3rd electrode 270 and the 4th electricity Pole 280, the 3rd electrode 270 electrically connect above-mentioned first electrode 250, and the 4th electrode 280 electrically connects above-mentioned second electrode 260. The effect for arranging electrode in piezoelectric ceramics 220 is to make piezoelectric ceramics 220 through polarization process to electrode extra electric field, each The polarised direction of each piezoelectric ceramic piece 221 in piezoelectric ceramics 220 is staggered.First piezoelectric ceramics and the second piezoelectricity pottery The difference of porcelain is, to the direct current of the applying of first electrode 250 of the first electrode 250 and the second piezoelectric ceramics of the first piezoelectric ceramics Electric field in opposite direction；Second electrode 260 in the same manner to the first piezoelectric ceramics and the second electrode 260 of the second piezoelectric ceramics apply DC electric field direction also contrary；That is the polarised direction of the first piezoelectric ceramics and the second piezoelectric ceramics is different；It follows that the The polarised direction of one piezoelectric ceramics and the arrangement of the second piezoelectric ceramics alternate internal is just contrary.Due to the first piezoelectric ceramics and second The polarised direction of piezoelectric ceramics is different, and when pumping signal is passed through to piezoelectric ceramics 220, each piezoelectric ceramics 220 can be in electric excitation Carry out corresponding contraction to uphold in the presence of signal, vibration force is acted on the wall of draw-in groove 240, then can be formed corresponding traveling wave and shake Dynamic.

Specifically, each piezoelectric ceramics 220 to the first arcuate segments 310 is passed through sin multi-phase alternating current electricity, to the 3rd arcuate segments 330 each piezoelectric ceramics 220 is passed through cos multi-phase alternating current electricity, and wherein stator 210 is earth terminal.If exchanging the first arcuate segments 310 On piezoelectric ceramics 220 and the 3rd arcuate segments 330 on the ac signal that is passed through of piezoelectric ceramics 220, then motor 100 reversely turn Dynamic.

Preferably, in the present embodiment first electrode 250 and second electrode 260 are to be coated on the relative of piezoelectric ceramics 220 Both sides conductive silver layer；3rd electrode 270 and the 4th electrode 280 are for being coated between two adjacent piezoelectric ceramic pieces 221 Conductive silver layer in gap.Above-mentioned conductive silver layer is opposite sides and the two adj acent piezoelectric potsherds 221 in piezoelectric ceramics 220 Gap coating conductive silver paste form, conductive silver paste may be selected polymer conductive silver slurry or slug type conductive silver slurry etc., The present embodiment is then coated on relevant position from slug type conductive silver slurry, and sintering obtains the piezoelectric ceramics 220 with electrode.

It is further preferred that piezoelectric ceramics 220 can be by flexible PCB bonding or directly in the side of electrode surface bonding wire Formula completes energising excitation.The present embodiment carries out energising excitation by the way of bonding wire.

Comb 230 is arranged at stator 210 and is arranged distant from the one of draw-in groove 240 towards the side of rotor 150, i.e. stator 210 Side, and comb 230 is uniformly arranged along the circumference of stator 210, when piezoelectric ceramics 220 forms constant wave vibration on stator 210 Afterwards, the comb 230 that the vibration can be arranged towards the side of rotor 150 by stator 210 amplifies, and acts on rotor 150, Rotation so as to drive rotor 150.

The operation principle of motor 100 that the present embodiment is provided is：It is arranged at the Traveling Ultrasonic motor stator of the motor 100 There are the first arcuate segments 310 and the 3rd arcuate segments 330, the first arcuate segments 310 in the side away from rotor 150 of the stator 210 in 200 A pocket set is respectively provided with the 3rd arcuate segments 330, each pocket set all has 4 draw-in grooves 240, in the first arcuate segments The mode being alternately arranged according to the first piezoelectric ceramics and the second piezoelectric ceramics in 310 4 draw-in grooves 240 is embedded at each card one by one In groove 240, in the 3rd arcuate segments 330, the first piezoelectric ceramics and the second piezoelectric ceramics is embedded according to same over-over mode, and And first the first piezoelectric ceramics in arcuate segments 310 and the second piezoelectric ceramics mounting means and the 3rd arcuate segments 330 in peace Dress mode is symmetrical with the axis of stator 210, the first electrode 250 of the first piezoelectric ceramics and the first electrode of the second piezoelectric ceramics 250 DC electric fields connected when being polarized in opposite direction, after piezoelectric ceramics 220 is installed on stator 210, the first arc The piezoelectric ceramics 220 in area 310 all connects sin multi-phase alternating current electricity, and the piezoelectric ceramics 220 of the 3rd arcuate segments 330 all connects cos phase place Alternating current, makes each piezoelectric ceramics 220 be stretched with the side of vertical clamping slot 240, forms traveling wave in the side wall of stator 210 Vibration, the constant wave vibration are amplified towards the comb 230 of the side of rotor 150 by stator 210, are applied to above rotor 150, enter And the rotation of drive rotor 150, the rotation of rotating shaft 140 is driven, makes state of the motor 100 in operating.

In sum, the motor for being provided with Traveling Ultrasonic motor stator that the utility model is provided, fixed using being arranged at The piezoelectric ceramics of the draw-in groove of the first arcuate segments of son and the 3rd arcuate segments, the operative orientation for making piezoelectric ceramics is no longer to be close to stator Surface is tangentially stretched, but the draw-in groove side of vertical stator is stretched, and can significantly increase the output torque of motor；The piezoelectricity pottery Porcelain is formed by multiple piezoelectric ceramic pieces stacking, and when stator is vibrated, impact is when deforming upon, and piezoelectric ceramics is not easy to occur splitting Line, improves the service life of the motor for arranging the Traveling Ultrasonic motor stator；And because piezoelectric ceramics is by being laminated more Electroceramics piece stacking sintering, its thickness increases, but the telescopic direction of piezoelectric ceramics is in the stacking of piezoelectric ceramic piece Vertical direction, action effect substantially, reduce operating voltage so that the voltage request of the drive circuit of motor is also obtained accordingly Corresponding reduction.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.All of the present utility model spirit and principle Within, any modification, equivalent substitution and improvement that is made etc., should be included within protection domain of the present utility model.

Claims (10)

1. a kind of Traveling Ultrasonic motor stator, it is characterised in that including stator and multiple piezoelectric ceramics, the side of the stator Be provided with comb, the opposite side relative with the comb side is arranged of the stator include the first arcuate segments, the second arcuate segments, 3rd arcuate segments and the 4th arcuate segments, first arcuate segments and the 3rd arcuate segments are symmetricly set in the center of the stator The both sides of axle, first arcuate segments and the 3rd arcuate segments are provided with multiple draw-in grooves, and the plurality of piezoelectric ceramics is one by one The draw-in groove is embedded at, the opposite sides of the piezoelectric ceramics is provided with first electrode and second electrode, the piezoelectric ceramics bag The multiple piezoelectric ceramic pieces for stacking gradually are included, gap between two adjacent piezoelectric ceramic pieces, is formed, described in adjacent two Gap is respectively provided with the 3rd electrode and the 4th electrode, and the 3rd electrode is electrically connected with the first electrode, the 4th electrode Electrically connect with the second electrode.

2. Traveling Ultrasonic motor stator according to claim 1, it is characterised in that the first electrode is arranged at described Towards the side of the central shaft of the stator, the second electrode is arranged at the piezoelectric ceramics away from the stator to piezoelectric ceramics Central shaft side.

3. Traveling Ultrasonic motor stator according to claim 2, it is characterised in that the plurality of piezoelectric ceramics includes One piezoelectric ceramics and the second piezoelectric ceramics, the plurality of draw-in groove is respectively along first arcuate segments and the week of the 3rd arcuate segments To being uniformly distributed, the plurality of draw-in groove includes that at least one pocket set, first arcuate segments and the 3rd arcuate segments are all provided with Pocket set described at least one is put, each described pocket set includes four draw-in grooves, many at least one pocket set The individual draw-in groove alternating is embedded first piezoelectric ceramics and second piezoelectric ceramics.

4. Traveling Ultrasonic motor stator according to claim 3, it is characterised in that first arcuate segments and described The quantity of the pocket set of three arcuate segments is one.

5. Traveling Ultrasonic motor stator according to claim 1, it is characterised in that the first electrode and described second Electrode is the conductive silver layer of the relative both sides for being coated on the piezoelectric ceramics.

6. Traveling Ultrasonic motor stator according to claim 1, it is characterised in that the 3rd electrode and the described 4th Electrode is the conductive silver layer being coated in two adjacent gaps.

7. Traveling Ultrasonic motor stator according to claim 1, it is characterised in that the comb is along the week of the stator To being uniformly distributed.

8. Traveling Ultrasonic motor stator according to claim 1, it is characterised in that second arcuate segments and described Arc length ratio of four arcuate segments on same circumference is 3:1.

9. a kind of motor, it is characterised in that including described in upper lid, bearing, lower cover, rotating shaft, rotor and any one of claim 1-8 Traveling Ultrasonic motor stator, the bearing is connected to the upper lid, the two ends of the rotating shaft respectively with the bearing and institute State lower cover and connection is rotated, the rotor and the stator are sheathed on the rotating shaft successively, and the rotor is located at leaning on for the stator The side of closely described bearing, the rotor are additionally provided with frictional layer near the side of the stator, and the setting of the stator is The side of comb is stated towards the rotor.

10. motor according to claim 9, it is characterised in that the upper lid also includes elastic component, and the elastic component is sheathed In the rotating shaft and positioned at the bearing near the side of the rotor.