CN101388624B - Longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasonic motor - Google Patents
Longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasonic motor Download PDFInfo
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- CN101388624B CN101388624B CN2008100648729A CN200810064872A CN101388624B CN 101388624 B CN101388624 B CN 101388624B CN 2008100648729 A CN2008100648729 A CN 2008100648729A CN 200810064872 A CN200810064872 A CN 200810064872A CN 101388624 B CN101388624 B CN 101388624B
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Abstract
The invention relates to a longitudinal vibration sandwich transducer type disk double rotor ultrasonic motor which relates to the technical field of piezoelectric ultrasonic motors. The ultrasonic motor solves the problem in an existing ultrasonic motor that the mechanical output ability is restricted and a single stator only can realize single movement output. The longitudinal vibration sandwich transducer type disk double rotor ultrasonic motor of the invention comprises a stator component, an upper end rotor component, a lower end rotor component, an upper end outer cover, a lower end outer cover, a rotated bearing, a bearing pre-tightening end cap and a bearing support, wherein continuous comb-shaped driving gears are manufactured on the upper end surface of a disc, a wear resistance bush ring is fixed on the end surface of an upper end disc rotor, which is contacted with the disk, the wear resistance bush ring is fixed on the end surface of a lower end disc rotor, which is contacted with the small end surface of a rear end cap, an upper end output shaft and a lower end output shaft are connected with the bearing block through a bearing in a rotary mode, the upper end outer cover and the lower end outer cover are respectively fixed on the upper end surface and the lower end surface of a cylinder flange, and thereby the upper end outer cover and the lower end outer cover are coaxial with the disk. The longitudinal vibration sandwich transducer type disk double rotor ultrasonic motor can be applied in the manufacture field of ultrasonic motors.
Description
Technical field
The present invention relates to a kind of longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine, 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 the microscopic motion of particle is converted to the macroscopic motion of rotor by the friction between stator, rotor coupling, have low speed high torque, need not gear, no electromagnetic interference, advantage such as response speed is fast and cut off self-lock, as a kind of piezoelectric actuator very application prospects is arranged.For the simplicity of exiting principle and the simplicity of theoretical analysis method, piezoelectric ultrasonic motor adopts the mode of metallic elastic body stickup piezoelectric ceramic thin sheet to encourage mostly at present, owing to be subjected to the d of piezoelectric ceramic
31Pattern mechanical-electric coupling efficient and ceramic material tensile strength are low, and the restriction of the intensity of glue-line and fatigue life etc., and such energisation mode makes the mechanical fan-out capability of ultrasound electric machine be subjected to serious restriction.In addition, in the robot field, the complicated robot motion of realization is had higher requirement to driving element, the single stator of the many employings of present ultrasound electric machine, can only realize single movement output, and the piezoelectric ultrasonic motor that possesses two kinds of motion outputs simultaneously can be simplified robot construction in a lot of occasions, improves the performance of robot.
Summary of the invention
The present invention encourages the mechanical fan-out capability that causes to be restricted for the mode owing to adopting the metallic elastic body to paste piezoelectric ceramic thin sheet that solves existing ultrasound electric machine existence and single stator can only be realized the problem that single movement is exported, and a kind of longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine is provided.
Ultrasound electric machine of the present invention comprises stator module, upper end rotor assembly, lower end rotor assembly, upper end outer cover, lower end outer cover, upper end rolling bearing, lower end rolling bearing, upper end bearing pre-tightened end cap, bottom end bearing pretension end cap, upper end first set screws, lower end first set screws, upper end bearing spider, bottom end bearing bearing, upper end second set screws, lower end second set screws, the 3rd set screws and nut group; Described stator module comprises driver plate and 2n longitudinal-shaking sandwich energy converter, wherein n is the natural number greater than 1, described driver plate comprises disk, outside thin-walled ring, disc flange, inboard thin-walled ring and bearing pedestal, outside thin-walled ring is arranged between disk and the disc flange, inboard thin-walled ring is arranged between disk and the bearing pedestal, disk, outside thin-walled ring, disc flange, inboard thin-walled ring and bearing pedestal are coaxial, the disk upper surface is processed with continuous pectination driving gear, and the upper surface of driving gear is the conical surface with certain taper; Described 2n longitudinal-shaking sandwich energy converter is symmetrically distributed and is fixedly connected on the lower surface of disk, and each longitudinal-shaking sandwich energy converter is made up of rear end cap, insulating case, two pairs of piezoelectric ceramic pieces, flange, copper electrode sheet and front end housings; Rear end cap and front end housing all are that the cross section is rectangle and tapered four prisms cylinder, and described cross section is parallel with the large end face of rear end cap or front end housing, and the small end face of described front end housing is fixedlyed connected with the lower surface of disk; All there is a tapped blind hole at the center of the large end face of described rear end cap and front end housing, and the two ends of described flange center have double-screw bolt; Flange is fixedlyed connected with rear end cap with front end housing respectively by double-screw bolt, the two pairs of piezoelectric ceramic pieces are enclosed between front end housing and the flange respectively and on the double-screw bolt between flange and the rear end cap, between front end housing and the piezoelectric ceramic piece, between the every pair of piezoelectric ceramic piece and be fixed with the copper electrode sheet respectively between rear end cap and the piezoelectric ceramic piece, piezoelectric ceramic piece and copper electrode sheet all and between the double-screw bolt of flange are fixed with insulating case; Described upper end rotor assembly is adjusted pad, upper end cover and upper end rotor set screws by upper end disc rotor, upper end output shaft, upper end connecting key, upper end rubber blanket, upper end disk spring, upper end locking nut, upper end preloaded bearing, upper end and is formed; The upper end disc rotor links by upper end connecting key and upper end output shaft, the upper end output shaft is rotationally connected by upper end preloaded bearing and bearing pedestal, realize pretension by upper end rubber blanket, upper end disk spring and upper end locking nut between upper end disc rotor and the disk, the upper end preloaded bearing is adjusted pad, upper end cover and upper end rotor set screws by the upper end and is realized pretension; Described lower end rotor assembly is adjusted pad, bottom end cover and lower end rotor set screws by lower end disc rotor, lower end output shaft, lower end connecting key, lower end rubber blanket, lower end disk spring, lower end locking nut, lower end preloaded bearing, lower end and is formed; The lower end disc rotor is connected with the upper end output shaft by the lower end connecting key; The lower end output shaft rotates with bearing pedestal by the lower end preloaded bearing and connects, realize pretension by lower end rubber blanket, lower end disk spring and lower end locking nut between the small end face of lower end disc rotor and rear end cap, the lower end preloaded bearing is adjusted pad, bottom end cover and lower end rotor set screws by the lower end and is realized pretension; Described upper end outer cover and lower end outer cover are fixed on respectively by the 3rd set screws and nut group on the upper surface and lower surface of cylinder flange, and upper end outer cover, lower end outer cover and disk are coaxial; Described upper end bearing spider is fixed on the outer cover of upper end by upper end second set screws, described bottom end bearing bearing is fixed on the outer cover of lower end by lower end second set screws, described upper end output shaft rotates with the upper end bearing spider by the upper end rolling bearing and connects, the upper end rolling bearing is realized pretension by upper end bearing pre-tightened end cap and upper end first set screws, described lower end output shaft rotates with the bottom end bearing bearing by the lower end rolling bearing and connects, and the lower end rolling bearing is realized pretension by bottom end bearing pretension end cap and lower end first set screws.
Ultrasound electric machine provided by the invention, piezo ceramic element adopts sandwich structure, adopts the d of the high mechanical-electric coupling efficient of piezoelectric ceramic
33Pattern work, solve the problem of pasting low, the mechanical fan-out capability difference of piezoelectric ceramic chip piezoelectric ultrasonic motor mechanical-electric coupling efficient, also simplify the structure by front end housing and stator disk integral structure, improved the controllability of disk surface of elastomer particle vibration track, eliminated and adopt alternate manner connection transducer and disk stator vibration waveform adverse effect.
Ultrasound electric machine provided by the invention, utilize the extensional vibration of piezoelectric ceramic piece in sandwich converter, to motivate extensional vibration, by the control input signal, realize that two groups of transducers are motivating the bending vibration modes response that two amplitudes are equal, all differ pi/2 on time and space on the disk stator, two bending vibration modes responses are superimposed upon and form the row ripple on the stator disk, and then, realize the macroscopic motion output of upper end rotor assembly by the coupling of the friction between stator driving gear and the upper end rotor assembly at stator driving gear surface particle generation elliptical trajectory; And the stator disk that is operated in bending vibration modes can cause the flexural vibrations of sandwich converter, make transducer be operated in initiatively longitudinal vibration-passive curved state that shakes, particle produces elliptical trajectory on the small end face of rear end cap, realizes the macroscopic motion output of lower end rotor assembly by the friction coupling with the lower end rotor assembly; Two kinds of motion outputs finally on single piezoelectric supersonic stator, have been realized.The present invention realizes transducer longitudinal vibration natural frequency, curved natural frequency and the curved degeneracy that shakes between the natural frequency of disk of shaking of transducer by the thickness of area ratio, front end housing and both sides, rear end cap square-section ratio, front end housing and rear end cap length, disk internal diameter size, disk outside dimension and the disk of adjustment front end housing and two end faces of rear end cap.Front end housing and rear end cap adopt the 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 of driving gear and rear end cap small end face surface particle, make motor performance be improved.Inboard thin-walled ring and outside thin-walled ring can realize that resiliency supported and vibration isolate, and drop to the influence degree that connects the flexural vibration mode of disk of stator module and exterior part minimum.
But that ultrasound electric machine provided by the invention has is simple in structure, flexible design, mechanical-electric coupling efficient height, can realize big moment output, stable performance, be easy to control the advantage of producing in serial form.
Description of drawings
Fig. 1 is longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine that the present invention proposes an integrally-built cutaway view when comprising 4 longitudinal vibration transducers; Fig. 2 is that the A-A of Fig. 1 is to cutaway view; Fig. 3 is the structural representation of stator module 1 among Fig. 1; Fig. 4 is that the B-B of Fig. 3 is to cutaway view; Fig. 5 is the polarised direction schematic diagram of the piezoelectric ceramic piece 1-3 among four longitudinal-shaking sandwich energy converter 1-7 among Fig. 1; Fig. 6 is the structural representation of driver plate 1-1 among Fig. 1; Fig. 7 is the pumping signal input schematic diagram of the stator module 1 among Fig. 3, and the ac voltage signal of input meets the following conditions: V
1=Acos (2 π t/T), V
2=Asin (2 π t/T), V
0=0, V
1Be the voltage excitation signals of first group of sandwich converter, V
2Be the voltage excitation signals of second group of sandwich converter, A is the driving voltage signal amplitude, and T is the driving voltage signal period, and t is the time, and the voltage excitation signals amplitude of two groups of transducers equates, frequency is that transducer self resonance frequency, phase difference are+90 °; Fig. 8 to Figure 11 is the stator module 1 among Fig. 2 when adopting ac voltage signal excitation shown in Figure 7, the stator circumferentially deploying figure that the vibration shape in complete vibration period changes, and the vibration shape that is specially stator nine rank bending vibration modes changes schematic diagram; Wherein Fig. 8 is t=nT (n=0,1,2...) Shi Ke a stator vibration shape schematic diagram; Fig. 9 is t=(n+1/4) T (n=0,1,2...) Shi Ke a stator vibration shape schematic diagram; Figure 10 is t=(n+1/2) T (n=0,1,2...) Shi Ke a stator vibration shape schematic diagram; Figure 11 is t=(n+3/4) T (n=0,1,2...) Shi Ke a stator vibration shape schematic diagram.
Embodiment
Embodiment one: referring to Fig. 1～Figure 11, present embodiment is made up of stator module 1, upper end rotor assembly, lower end rotor assembly, upper end outer cover 4, lower end outer cover 5, upper end rolling bearing 6-1, lower end rolling bearing 6-2, upper end bearing pre-tightened end cap 7-1, bottom end bearing pretension end cap 7-2, the upper end first set screws 8-1, the lower end first set screws 8-2, upper end bearing spider 9-1, bottom end bearing bearing 9-2, the upper end second set screws 10-1, the lower end second set screws 10-2, the 3rd set screws 11 and nut group 12; Described stator module 1 is made up of driver plate 1-1 and 2n longitudinal-shaking sandwich energy converter 1-7, wherein n is the natural number greater than 1, described driver plate 1-1 is by disk 1-1-1, outside thin-walled ring 1-1-2, disc flange 1-1-3, inboard thin-walled ring 1-1-6 and bearing pedestal 1-1-7 form, outside thin-walled ring 1-1-2 is arranged between disk 1-1-1 and the disc flange 1-1-3, inboard thin-walled ring 1-1-6 is arranged between disk 1-1-1 and the bearing pedestal 1-1-7, disk 1-1-1, outside thin-walled ring 1-1-2, disc flange 1-1-3, inboard thin-walled ring 1-1-6 and bearing pedestal 1-1-7 are coaxial, disk 1-1-1 upper surface is processed with continuous pectination driving gear 1-1-5, and the upper surface of driving gear 1-1-5 is the conical surface with certain taper; Described 2n longitudinal-shaking sandwich energy converter 1-7 is symmetrically distributed and is fixedly connected on the lower surface of disk 1-1-1, and each longitudinal-shaking sandwich energy converter 1-7 is made up of rear end cap 1-5, insulating case 1-2, two couples of piezoelectric ceramic piece 1-3, flange 1-4, copper electrode sheet 1-6 and front end housing 1-1-4; Rear end cap 1-5 and front end housing 1-1-4 all are that the cross section is rectangle and tapered four prisms cylinder, and the small end face of described front end housing 1-1-4 is fixedlyed connected with the lower surface of disk 1-1-1; All there is a tapped blind hole at the center of the large end face of described rear end cap 1-5 and front end housing 1-1-4, and the two ends at described flange 1-4 center have double-screw bolt 1-4-1; Flange 1-4 is fixedlyed connected with rear end cap 1-5 with front end housing 1-1-4 respectively by double-screw bolt 1-4-1, the two couples of piezoelectric ceramic piece 1-3 are enclosed between front end housing 1-1-4 and the flange 1-4 respectively and on the double-screw bolt 1-4-1 between flange 1-4 and the rear end cap 1-5, between front end housing 1-1-4 and the piezoelectric ceramic piece 1-3, between the every couple of piezoelectric ceramic piece 1-3 and be fixed with copper electrode sheet 1-6 respectively between rear end cap 1-5 and the piezoelectric ceramic piece 1-3, piezoelectric ceramic piece 1-3 and copper electrode sheet 1-6 all and between the double-screw bolt 1-4-1 of flange 1-4 are fixed with insulating case 1-2; Described upper end rotor assembly adjusts pad 2-9-1, upper end cover 2-10-1 by upper end disc rotor 2-1, upper end output shaft 2-2, upper end connecting key 2-3-1, upper end rubber blanket 2-5-1, upper end disk spring 2-6-1, upper end locking nut 2-7-1, upper end preloaded bearing 2-8-1, upper end and upper end rotor set screws 2-11-1 forms; Upper end disc rotor 2-1 links by upper end connecting key 2-3-1 and upper end output shaft 2-2, upper end output shaft 2-2 is rotationally connected by upper end preloaded bearing 2-8-1 and bearing pedestal 1-1-7, realize pretension by upper end rubber blanket 2-5-1, upper end disk spring 2-6-1 and upper end locking nut 2-7-1 between upper end disc rotor 2-1 and the disk 1-1-1, upper end preloaded bearing 2-8-1 adjusts pad 2-9-1, upper end cover 2-10-1 by the upper end and upper end rotor set screws 2-11-1 realizes pretension; Described lower end rotor assembly adjusts pad 2-9-2, bottom end cover 2-10-2 by lower end disc rotor 3-1, lower end output shaft 3-2, lower end connecting key 2-3-2, lower end rubber blanket 2-5-2, lower end disk spring 2-6-2, lower end locking nut 2-7-2, lower end preloaded bearing 2-8-2, lower end and lower end rotor set screws 2-11-2 forms; Lower end disc rotor 3-1 is connected with upper end output shaft 3-2 by lower end connecting key 2-3-2; Lower end output shaft 3-2 rotates with bearing pedestal 1-1-7 by lower end preloaded bearing 2-8-2 and connects, realize pretension by lower end rubber blanket 2-5-2, lower end disk spring 2-6-2 and lower end locking nut 2-7-2 between the small end face of lower end disc rotor 3-1 and rear end cap 1-5, lower end preloaded bearing 2-8-2 adjusts pad 2-9-2, bottom end cover 2-10-2 by the lower end and lower end rotor set screws 2-11-2 realizes pretension; Described upper end outer cover 4 and lower end outer cover 5 are separately fixed on the upper surface and lower surface of cylinder flange 1-1-3 by the 3rd set screws 11 and nut group 12, and upper end outer cover 4, lower end outer cover 5 and disk 1-1-1 are coaxial; Described upper end bearing spider 9-1 is fixed on the outer cover 4 of upper end by the upper end second set screws 10-1, described bottom end bearing bearing 9-2 is fixed on the lower end outer cover 5 by the lower end second set screws 10-2, described upper end output shaft 2-2 rotates with upper end bearing spider 9-1 by upper end rolling bearing 6-1 and connects, upper end rolling bearing 6-1 realizes pretension by upper end bearing pre-tightened end cap 7-1 and the upper end first set screws 8-1, described lower end output shaft 3-2 rotates with bottom end bearing bearing 9-2 by lower end rolling bearing 6-2 and connects, and lower end rolling bearing 6-2 realizes pretension by bottom end bearing pretension end cap 7-2 and the lower end first set screws 8-2.When disk was operated in n rank bending vibration modes, the contained transducer number of the stator module of the ultrasound electric machine that present embodiment provides mostly was 4n most, the angle theta between any two transducers
1Satisfy: θ
1=90 ° * m/n, wherein m ∈ 1,2 ..., 4n-1}; All transducers are divided into two groups, the angle theta between any on the same group two transducers
2Satisfy: θ
2=180 ° * m/n, wherein m ∈ 1 ..., 2n-1}; Output torque that can be according to actual needs and size restrictions be the exponent number and the transducer number of selector disc stator bending vibration modes flexibly.
Described longitudinal vibration transducer 1-7 adopts along the piezoelectric ceramic piece 1-3 of thickness direction polarization and realizes extensional vibration; All longitudinal-shaking sandwich energy converter 1-7 are divided into two groups and encourage, as Fig. 7～shown in Figure 11, two groups of longitudinal-shaking sandwich energy converter 1-7 adopt amplitude to equate, frequency is self resonance frequency, phase difference is ac voltage signal when excitation of+90 °, utilize the extensional vibration of piezoelectric ceramic piece 1-3 in longitudinal-shaking sandwich energy converter 1-7, to motivate extensional vibration, realize that two groups of longitudinal-shaking sandwich energy converter 1-7 motivate two amplitudes and equate on disk 1-1-1, on time and space, all differ the bending vibration modes response of pi/2, two bending vibration modes responses are superimposed upon disk 1-1-1 and go up formation row ripple, and then, realize the macroscopic motion output of upper end rotor assembly by the coupling of the friction between stator driving gear 1-1-5 and the upper end rotor assembly at driving gear 1-1-5 surface particle generation elliptical trajectory; And the disk 1-1-1 that is operated in bending vibration modes can cause the flexural vibrations of longitudinal-shaking sandwich energy converter 1-7, make longitudinal-shaking sandwich energy converter 1-7 be operated in initiatively longitudinal vibration-passive curved state that shakes, particle produces elliptical trajectory on the small end face of rear end cap 1-5, realizes the macroscopic motion output of lower end rotor assembly by the friction coupling with the lower end rotor assembly; Two kinds of motion outputs finally on single piezoelectric supersonic stator, have been realized; If adjusting the phase difference of excitation signals is-90 °, can change capable wave line of propagation, finally realize the counter motion of rotor assembly; Length, the internal diameter size of disk 1-1-1, the outside dimension of disk 1-1-1 and the thickness of disk 1-1-1 of both sides, square-section ratio, front end housing 1-1-4 and the rear end cap 1-5 of area ratio, front end housing 1-1-4 and rear end cap 1-5 by adjusting front end housing 1-1-4 and two end faces of rear end cap 1-5 are realized the longitudinal vibration natural frequency of longitudinal-shaking sandwich energy converter 1-7, the curved degeneracy that shakes between the natural frequency of curved shake natural frequency and disk 1-1-1; Front end housing 1-1-4 and rear end cap 1-5 adopt the 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 of the small end face surface particle of driving gear 1-1-5 and rear end cap 1-5, make motor performance be improved.
Embodiment two: referring to Fig. 6, the difference of present embodiment and embodiment one is that described disk 1-1-1, front end housing 1-1-4, outside thin-walled ring 1-1-2, disc flange 1-1-3, inboard thin-walled ring 1-1-6 and bearing pedestal 1-1-7 adopt a block of metal materials processing to become driver plate 1-1 integral piece.
In the present embodiment described disk 1-1-1, front end housing 1-1-4, outside thin-walled ring 1-1-2, disc flange 1-1-3, inboard thin-walled ring 1-1-6 and bearing pedestal 1-1-7 are processed the all-in-one-piece member, can play the purpose that reduces energy loss, help improving the controllability of driving gear surface particle vibration track.
Embodiment three: referring to Fig. 5, the difference of present embodiment and embodiment one is that described piezoelectric ceramic piece 1-3 polarizes along thickness direction, and the polarised direction of two piezoelectric ceramic pieces among the every couple of piezoelectric ceramic piece 1-3 is opposite.
Embodiment four: the difference of present embodiment and embodiment one is that the cross section of the contact area of described piezoelectric ceramic piece 1-3, flange 1-4 and the contacted side of piezoelectric ceramic piece 1-3 and copper electrode sheet 1-6 and piezoelectric ceramic piece 1-3 is rectangle or circle.
The shape of the contact area of the piezoelectric ceramic piece 1-3 in the present embodiment, flange 1-4 and the contacted side of piezoelectric ceramic piece 1-3 and copper electrode sheet 1-6 and piezoelectric ceramic piece 1-3 can simplified processing process.
Embodiment five: referring to Fig. 2, the difference of present embodiment and embodiment one is that the small end of described rear end cap 1-5 is the conical surface with tapering, and the small end place conical surface of all rear end cap 1-5 is coaxial with disk 1-1-1.
Embodiment six: referring to Fig. 1, present embodiment has increased wear-resisting lining ring 2-4-1 in upper end and the wear-resisting lining ring 2-4-2 in lower end on the basis of embodiment one, the wear-resisting lining ring 2-4-1 in upper end is fixed on upper end disc rotor 2-1 and the contacted end face of disk 1-1-1, and the wear-resisting lining ring 2-4-2 in lower end is fixed on lower end disc rotor 3-1 and the contacted end face of rear end cap 1-5 small end face.
The small end face of the upper surface of wear-resisting lining ring 2-4-1 in the upper end of present embodiment and driving gear 1-1-5 and wear-resisting lining ring 2-4-2 in lower end and rear end cap 1-5 all adopts the conical surface to contact, on the basis of realizing the rotor assembly location, increased contact area, can improve the motor output torque, increase the service life, effectively eliminate noise.
Embodiment seven: referring to Fig. 1, the difference of present embodiment and embodiment six is, wear-resisting lining ring 2-4-1 in described upper end and the wear-resisting lining ring 2-4-2 in lower end all adopt Polymer Friction Materials, by bonding method wear-resisting lining ring 2-4-1 in upper end and the wear-resisting lining ring 2-4-2 in lower end are bonded in upper end disc rotor 2-1 and the contacted side of disk 1-1-1 and lower end disc rotor 3-1 and the contacted side of rear end cap 1-5 small end face respectively.
Embodiment eight: referring to Fig. 1 and Fig. 2, present embodiment and embodiment five or sixs' difference is, the wear-resisting lining ring 2-4-1 in described upper end and the wear-resisting lining ring 2-4-2 in lower end all have the identical tapering of the small end conical surface with the driving gear 1-1-5 upper end conical surface and rear end cap 1-5.
Content of the present invention is not limited only to the content of above-mentioned each embodiment, and the combination of one of them or several embodiments can realize goal of the invention equally.
Claims (8)
1. longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine, it comprises stator module (1), the upper end rotor assembly, the lower end rotor assembly, upper end outer cover (4), lower end outer cover (5), upper end rolling bearing (6-1), lower end rolling bearing (6-2), upper end bearing pre-tightened end cap (7-1), bottom end bearing pretension end cap (7-2), upper end first set screws (8-1), lower end first set screws (8-2), upper end bearing spider (9-1), bottom end bearing bearing (9-2), upper end second set screws (10-1), lower end second set screws (10-2), the 3rd set screws (11) and nut group (12); Described stator module (1) comprises driver plate (1-1) and 2n longitudinal-shaking sandwich energy converter (1-7), wherein n is the natural number greater than 1, described driver plate (1-1) comprises disk (1-1-1), outside thin-walled ring (1-1-2), disc flange (1-1-3), inboard thin-walled ring (1-1-6) and bearing pedestal (1-1-7), outside thin-walled ring (1-1-2) is arranged between disk (1-1-1) and the disc flange (1-1-3), inboard thin-walled ring (1-1-6) is arranged between disk (1-1-1) and the bearing pedestal (1-1-7), disk (1-1-1), outside thin-walled ring (1-1-2), disc flange (1-1-3), inboard thin-walled ring (1-1-6) and bearing pedestal (1-1-7) are coaxial, disk (1-1-1) upper surface is processed with continuous pectination driving gear (1-1-5), and the upper surface of driving gear (1-1-5) is the conical surface with certain taper; A described 2n longitudinal-shaking sandwich energy converter (1-7) is symmetrically distributed and is fixedly connected on the lower surface of disk (1-1-1), and each longitudinal-shaking sandwich energy converter (1-7) is made up of rear end cap (1-5), insulating case (1-2), two pairs of piezoelectric ceramic pieces (1-3), flange (1-4), copper electrode sheet (1-6) and front end housing (1-1-4); Rear end cap (1-5) and front end housing (1-1-4) all are that the cross section is rectangle and tapered four prisms cylinder, described cross section is parallel with the large end face of rear end cap (1-5) or front end housing (1-1-4), and the small end face of described front end housing (1-1-4) is fixedlyed connected with the lower surface of disk (1-1-1); All there is a tapped blind hole at the center of the large end face of described rear end cap (1-5) and front end housing (1-1-4), and the two ends at described flange (1-4) center have double-screw bolt (1-4-1); Flange (1-4) is fixedlyed connected with rear end cap (1-5) with front end housing (1-1-4) respectively by double-screw bolt (1-4-1), two pairs of piezoelectric ceramic pieces (1-3) are enclosed between front end housing (1-1-4) and the flange (1-4) respectively and on the double-screw bolt (1-4-1) between flange (1-4) and the rear end cap (1-5), between front end housing (1-1-4) and piezoelectric ceramic piece (1-3), be fixed with copper electrode sheet (1-6) respectively between every pair of piezoelectric ceramic piece (1-3) and between rear end cap (1-5) and the piezoelectric ceramic piece (1-3), piezoelectric ceramic piece (1-3) and copper electrode sheet (1-6) all and between the double-screw bolt (1-4-1) of flange (1-4) are fixed with insulating case (1-2); It is characterized in that described upper end rotor assembly adjusts pad (2-9-1), upper end cover (2-10-1) and upper end rotor set screws (2-11-1) by upper end disc rotor (2-1), upper end output shaft (2-2), upper end connecting key (2-3-1), upper end rubber blanket (2-5-1), upper end disk spring (2-6-1), upper end locking nut (2-7-1), upper end preloaded bearing (2-8-1), upper end and form; Upper end disc rotor (2-1) links by upper end connecting key (2-3-1) and upper end output shaft (2-2), upper end output shaft (2-2) is rotationally connected by upper end preloaded bearing (2-8-1) and bearing pedestal (1-1-7), realize pretension by upper end rubber blanket (2-5-1), upper end disk spring (2-6-1) and upper end locking nut (2-7-1) between upper end disc rotor (2-1) and the disk (1-1-1), upper end preloaded bearing (2-8-1) is adjusted pad (2-9-1), upper end cover (2-10-1) and upper end rotor set screws (2-11-1) by the upper end and is realized pretension; Described lower end rotor assembly is adjusted pad (2-9-2), bottom end cover (2-10-2) and lower end rotor set screws (2-11-2) by lower end disc rotor (3-1), lower end output shaft (3-2), lower end connecting key (2-3-2), lower end rubber blanket (2-5-2), lower end disk spring (2-6-2), lower end locking nut (2-7-2), lower end preloaded bearing (2-8-2), lower end and is formed; Lower end disc rotor (3-1) is connected with upper end output shaft (3-2) by lower end connecting key (2-3-2); Lower end output shaft (3-2) rotates with bearing pedestal (1-1-7) by lower end preloaded bearing (2-8-2) and connects, realize pretension by lower end rubber blanket (2-5-2), lower end disk spring (2-6-2) and lower end locking nut (2-7-2) between the small end face of lower end disc rotor (3-1) and rear end cap (1-5), lower end preloaded bearing (2-8-2) is adjusted pad (2-9-2), bottom end cover (2-10-2) and lower end rotor set screws (2-11-2) by the lower end and is realized pretension; Described upper end outer cover (4) and lower end outer cover (5) are separately fixed on the upper surface and lower surface of cylinder flange (1-1-3) by the 3rd set screws (11) and nut group (12), and upper end outer cover (4), lower end outer cover (5) and disk (1-1-1) are coaxial; Described upper end bearing spider (9-1) is fixed on the upper end outer cover (4) by upper end second set screws (10-1), described bottom end bearing bearing (9-2) is fixed on the lower end outer cover (5) by lower end second set screws (10-2), described upper end output shaft (2-2) rotates with upper end bearing spider (9-1) by upper end rolling bearing (6-1) and connects, upper end rolling bearing (6-1) is realized pretension by upper end bearing pre-tightened end cap (7-1) and upper end first set screws (8-1), described lower end output shaft (3-2) rotates with bottom end bearing bearing (9-2) by lower end rolling bearing (6-2) and connects, and lower end rolling bearing (6-2) is realized pretension by bottom end bearing pretension end cap (7-2) and lower end first set screws (8-2).
2. longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine according to claim 1 is characterized in that described disk (1-1-1), front end housing (1-1-4), outside thin-walled ring (1-1-2), disc flange (1-1-3), inboard thin-walled ring (1-1-6) and bearing pedestal (1-1-7) adopt a block of metal materials processing to become driver plate (1-1) integral piece.
3. longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine according to claim 1 is characterized in that described piezoelectric ceramic piece (1-3) along the thickness direction polarization, and the polarised direction of two piezoelectric ceramic pieces in every pair of piezoelectric ceramic piece (1-3) is opposite.
4. longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine according to claim 1, the cross section that it is characterized in that described piezoelectric ceramic piece (1-3) is rectangle or circle, described flange (1-4) is rectangle or circle with the contacted side of piezoelectric ceramic piece (1-3), and described copper electrode sheet (1-6) is rectangle or circle with the contact area of piezoelectric ceramic piece (1-3).
5. longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine according to claim 1, the small end that it is characterized in that described rear end cap (1-5) is the conical surface with tapering, and the small end place conical surface of all rear end caps (1-5) is coaxial with disk (1-1-1).
6. longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine according to claim 1, it is characterized in that described upper end rotor assembly and lower end rotor assembly also comprise upper end wear-resisting lining ring (2-4-1) and the wear-resisting lining ring in lower end (2-4-2) respectively, the wear-resisting lining ring in upper end (2-4-1) is fixed on upper end disc rotor (2-1) and the contacted end face of disk (1-1-1), and lower end wear-resisting lining ring (2-4-2) is fixed on lower end disc rotor (3-1) and the contacted end face of rear end cap (1-5) small end face.
7. longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machine according to claim 6, it is characterized in that the wear-resisting lining ring of wear-resisting lining ring in described upper end (2-4-1) and lower end (2-4-2) all adopts Polymer Friction Materials, the wear-resisting lining ring of wear-resisting lining ring in upper end (2-4-1) and lower end (2-4-2) is bonded in upper end disc rotor (2-1) and the contacted side of disk (1-1-1) and lower end disc rotor (3-1) and the contacted side of rear end cap (1-5) small end face respectively by bonding method.
8. according to claim 5 or 6 described longitudinal-shaking sandwich energy converter type collar plate shape dual rotor ultrasound electric machines, it is characterized in that wear-resisting lining ring in described upper end (2-4-1) and lower end wear-resisting lining ring (2-4-2) all have the identical tapering of the small end conical surface with driving gear (1-1-5) the upper end conical surface and rear end cap (1-5).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6140741A (en) * | 1997-07-28 | 2000-10-31 | Canon Kabushiki Kaisha | Vibration type actuator |
| CN1388638A (en) * | 2002-06-30 | 2003-01-01 | 华中科技大学 | Traveling-wave type supersonic motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6140741A (en) * | 1997-07-28 | 2000-10-31 | Canon Kabushiki Kaisha | Vibration type actuator |
| CN1388638A (en) * | 2002-06-30 | 2003-01-01 | 华中科技大学 | Traveling-wave type supersonic motor |
Non-Patent Citations (2)
| Title |
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| JP特开平11-18452A 1999.01.22 |
| JP特开平9-135587A 1997.05.20 |
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