CN110138262B - Linear ultrasonic motor with single excitation source for bidirectional actuation - Google Patents
Linear ultrasonic motor with single excitation source for bidirectional actuation Download PDFInfo
- Publication number
- CN110138262B CN110138262B CN201910440768.3A CN201910440768A CN110138262B CN 110138262 B CN110138262 B CN 110138262B CN 201910440768 A CN201910440768 A CN 201910440768A CN 110138262 B CN110138262 B CN 110138262B
- Authority
- CN
- China
- Prior art keywords
- cover plate
- stator
- front cover
- round holes
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005284 excitation Effects 0.000 title claims abstract description 15
- 230000002457 bidirectional effect Effects 0.000 title abstract description 10
- 239000000919 ceramic Substances 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000001154 acute effect Effects 0.000 claims abstract description 6
- 238000003491 array Methods 0.000 claims 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
- H02N2/001—Driving devices, e.g. vibrators
- H02N2/003—Driving devices, e.g. vibrators using longitudinal or radial modes combined with bending modes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
- H02N2/043—Mechanical transmission means, e.g. for stroke amplification
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/06—Drive circuits; Control arrangements or methods
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses a linear ultrasonic motor with a single excitation source for bidirectional actuation, which comprises a rotor, a stator and an elastic propping mechanism, wherein the elastic propping mechanism is connected with the stator and can enable the stator to prop against and contact with the rotor, the stator comprises a front cover plate, a rear cover plate and a piezoelectric ceramic plate, the front cover plate and the rear cover plate are fixedly connected together, the piezoelectric ceramic plate is positioned between the front cover plate and the rear cover plate, the central axis of the stator and the moving direction of the rotor form an acute angle relation, and the front cover plate is provided with round holes which are arranged in the direction of forming an acute angle with the central axis of the stator. It has the following advantages: the processing technology is simple, and the bidirectional operation of the motor can be completed only by using a group of piezoelectric ceramic plates and a single excitation source, so that the driving control circuit of the ultrasonic motor is simplified.
Description
Technical Field
The invention relates to the field of motors, in particular to a linear ultrasonic motor with single excitation source for bidirectional actuation.
Background
At present, compared with other types of ultrasonic motors, the longitudinal and bending composite ultrasonic motor has the advantage of large torque volume ratio, and becomes one of hot spots for research at home and abroad in recent years. The ultrasonic motor has the characteristics of high precision, quick response, compact structure and the like, and has wide application field.
An existing longitudinal and bending composite vibration mode ultrasonic motor, such as a patent with a patent publication number of CN101656490A and a patent name of a longitudinal and bending composite mode linear ultrasonic motor, is characterized in that two modes of longitudinal vibration and bending vibration are realized through two groups of piezoelectric ceramic plates, and the vibration mode is changed through changing an excitation source.
In the prior art, a single group of piezoelectric ceramics is used for exciting a longitudinal bending mode simultaneously, and composite vibration is used for assisting cutting processing. For example, the patent number is CN106733571A, the patent name is a single-excitation longitudinal-bending composite vibration ultrasonic transducer, the invention simultaneously excites two modes of a piezoelectric vibrator under single-source excitation, the invention is an ultrasonic transducer applied to the processing field, and the transducer proposes to realize single excitation double modes by utilizing a chute on a structure, but the processing technology of the chute is complex.
Disclosure of Invention
The invention provides a linear ultrasonic motor with single excitation source for bidirectional actuation, which overcomes the defects of the prior art in the background art.
The technical scheme adopted for solving the technical problems is as follows:
the linear ultrasonic motor with single excitation source and double action includes one rotor, one stator and one elastic propping mechanism connected to the stator to make the stator contact with the rotor, and the stator includes one front cover board, one back cover board and one piezoelectric ceramic sheet between the front cover board and the back cover board.
In one embodiment: the elastic propping mechanism comprises a torsion spring, one end of the torsion spring is fixed on a base, and the other end of the torsion spring is fixedly connected with the stator.
In one embodiment: the round holes are in a single row, and all round holes in the single row of round holes are distributed at equal intervals.
In one embodiment: the round holes are arranged in a multi-column hole array, the rows of the multi-column hole array are arranged at equal intervals, and the round holes in each row are arranged at equal intervals.
In one embodiment: the cross section of the stator is rectangular.
In one embodiment: the cross section of the stator is circular.
In one embodiment: and the front cover plate, the rear cover plate and the piezoelectric ceramic plate are fixedly connected through a bolt.
In one embodiment: the mover is a linear guide rail or a sliding block.
In one embodiment: the rotor is a rotor rotating around a fixed rotating shaft.
In one embodiment: the round hole is a through hole.
Compared with the background technology, the technical proposal has the following advantages:
1. the front cover plate is provided with the round holes, so that the mass distribution of the front cover plate is uneven, the structure is asymmetric, and when one working mode (longitudinal vibration mode) of the stator is excited by a group of piezoelectric ceramic plates in a single phase, the other working mode (bending vibration mode) can be induced at the same time; the two working modes with similar frequencies have a certain phase difference in space and a certain phase difference in time, so that particles of a stator on the contact surface of the rotor and the stator generate elliptical motion to push the rotor to move, and therefore, when the ultrasonic motor is driven, the motor can perform bidirectional operation by only using a group of piezoelectric ceramic plates and a single excitation source, and the driving control circuit of the ultrasonic motor is simplified.
2. The round hole is simple in processing technology and high in processing efficiency.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of a linear ultrasonic motor with a single excitation source for bidirectional actuation according to this embodiment.
Detailed Description
Referring to fig. 1, a linear ultrasonic motor with a single excitation source for bidirectional operation includes a rotor 5, a stator 9, and an elastic supporting mechanism 6, wherein the elastic supporting mechanism 6 is connected with the stator 9 and enables the stator 9 to contact with the rotor 5 in a supporting manner, the stator 9 includes a front cover plate 2, a rear cover plate 1, and a piezoelectric ceramic plate 3 (the front cover plate 2, the rear cover plate 1, and the piezoelectric ceramic plate 3 can be fixedly connected by a bolt) fixedly connected together between the front cover plate 2 and the rear cover plate 1, a central axis of the stator 9 and a movement direction of the rotor 5 form an acute inclination angle relationship, and an arrangement round hole 4 is arranged on the front cover plate 2 along a direction forming an acute angle with the central axis of the stator. In this embodiment, the circular hole 4 is a through hole, and the through hole penetrates through two pairs of side surfaces of the front cover plate 2.
The elastic propping mechanism 6 comprises a torsion spring, one end of which is fixed on a base, and the other end of which is fixedly connected with the stator 9.
In a preferred embodiment, the round holes 4 are in a single row, and each round hole in the single row of round holes is distributed at equal intervals. In another preferred embodiment, the round holes 4 are arranged in a multi-column hole array, wherein the rows of the multi-column hole array are arranged at equal intervals, and the round holes in each row are arranged at equal intervals.
The stator 9 is rectangular or circular in cross section.
The mover 5 is a linear guide rail or a sliding block. The mover 5 may also be a rotor rotating around a fixed rotation axis.
When the ultrasonic motor is used, a single-phase power supply is applied to the piezoelectric ceramic plate 3, the piezoelectric ceramic plate 3 can excite a longitudinal vibration mode of the stator 9 due to the inverse piezoelectric effect, such as a longitudinal vibration curve 7 shown in fig. 1, and meanwhile, the front cover plate 2 is drilled with the round holes 4, so that the mass distribution of the front cover plate 2 is uneven, the structure is asymmetric, and the stator 9 can excite a bending vibration mode of the stator while exciting the longitudinal vibration mode, such as a bending vibration curve 8 shown in fig. 1; the two working modes with similar frequencies have a certain phase difference in space and a certain phase difference in time, so that the stator 9 and the particles on the contact surface of the rotor 5 do elliptical motion, thereby pushing the rotor 5 to move and outputting linear displacement. When the working mode of the stator 9 is changed, the elliptical inclination direction is changed, so that the bidirectional movement of the rotor 5 is realized.
The design structure is simple, different vibration modes of the stator 9 are excited by the asymmetry of the structure of the front cover plate 2, and the stator 9 is designed to be inclined by a certain angle between the central axis direction of the stator 9 and the moving direction of the rotor 5 to push the rotor to output linear displacement, so that the driving state of the stator 9 is ingeniously utilized. The complexity of the processing technology is further simplified by adopting the round hole 4 design; and when the ultrasonic motor is driven, the motor can be driven in two directions only by using a group of piezoelectric ceramic plates and a single excitation source, so that the driving control circuit of the ultrasonic motor is simplified.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and therefore should not be taken as limiting the scope of the invention, for all changes and modifications that come within the meaning and range of equivalency of the claims and specification are therefore intended to be embraced therein.
Claims (1)
1. A linear ultrasonic motor with single excitation source and two-way actuation is characterized in that: the stator comprises a front cover plate, a rear cover plate and a piezoelectric ceramic plate, wherein the front cover plate and the rear cover plate are fixedly connected together, the central axis of the stator and the moving direction of the rotor form an acute angle inclination relation, and the front cover plate is provided with round holes which are arranged in a direction forming an acute angle with the central axis of the stator;
the elastic propping mechanism comprises a torsion spring, one end of the torsion spring is fixed on a base, and the other end of the torsion spring is fixedly connected with the stator;
the round holes are in a single row, and all round holes in the single row of round holes are distributed at equal intervals; or the round holes are multi-column hole arrays, the rows of the multi-column hole arrays are distributed at equal intervals, and the round holes in each row are distributed at equal intervals;
the cross section of the stator is rectangular or circular;
the front cover plate, the rear cover plate and the piezoelectric ceramic plate are fixedly connected through a bolt;
the rotor is a linear guide rail or a sliding block or a rotor rotating around a fixed rotating shaft;
the round hole is a through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910440768.3A CN110138262B (en) | 2019-05-24 | 2019-05-24 | Linear ultrasonic motor with single excitation source for bidirectional actuation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910440768.3A CN110138262B (en) | 2019-05-24 | 2019-05-24 | Linear ultrasonic motor with single excitation source for bidirectional actuation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110138262A CN110138262A (en) | 2019-08-16 |
| CN110138262B true CN110138262B (en) | 2024-02-02 |
Family
ID=67581568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910440768.3A Active CN110138262B (en) | 2019-05-24 | 2019-05-24 | Linear ultrasonic motor with single excitation source for bidirectional actuation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110138262B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101697460A (en) * | 2009-10-28 | 2010-04-21 | 南京航空航天大学 | Two-way single-mode ramp type tower-shaped linear ultrasonic motor and electric excitation method |
| CN104362895A (en) * | 2014-12-09 | 2015-02-18 | 苏州科技学院 | Singe-stimulating linear ultrasonic motor |
| CN209881675U (en) * | 2019-05-24 | 2019-12-31 | 华侨大学 | Linear ultrasonic motor with single excitation source for bidirectional actuation |
-
2019
- 2019-05-24 CN CN201910440768.3A patent/CN110138262B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101697460A (en) * | 2009-10-28 | 2010-04-21 | 南京航空航天大学 | Two-way single-mode ramp type tower-shaped linear ultrasonic motor and electric excitation method |
| CN104362895A (en) * | 2014-12-09 | 2015-02-18 | 苏州科技学院 | Singe-stimulating linear ultrasonic motor |
| CN209881675U (en) * | 2019-05-24 | 2019-12-31 | 华侨大学 | Linear ultrasonic motor with single excitation source for bidirectional actuation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110138262A (en) | 2019-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7307372B2 (en) | Piezoelectric motor and method of exciting an ultrasonic traveling wave to drive the motor | |
| CN106208803A (en) | Utilize rectangular block shape linear ultrasonic motor and electric excitation method thereof thereof that single mode drives | |
| CN102931870B (en) | A kind of standing wave type linear ultrasonic motor | |
| CN101227157B (en) | Piezoelectricity thread driver adopting Langevin-type transducer structure | |
| CN209881675U (en) | Linear ultrasonic motor with single excitation source for bidirectional actuation | |
| EP2374205B1 (en) | Piezoelectric quasi-resonance motors based on acoustic standing waves with combined resonator | |
| CN110138262B (en) | Linear ultrasonic motor with single excitation source for bidirectional actuation | |
| Ucha | Present status of ultrasonic motors | |
| CN102882420A (en) | Surface-mounted piezoelectric ceramic and metal composite beam and method for exciting the composite beam to realize longitudinal and bending compounded vibration | |
| CN108390587B (en) | Single-mode driven double-drive foot-shaped linear ultrasonic motor and control method | |
| CN211859982U (en) | Rhombic double-longitudinal-vibration sandwich type excitation double-foot linear ultrasonic motor and stator thereof | |
| CN211859981U (en) | Circular patch type double-foot linear ultrasonic motor and stator thereof | |
| US9705425B2 (en) | Piezoelectric linear motor | |
| CN102025286B (en) | Alternating force based linear ultrasonic motor | |
| CN102497131B (en) | Actuator for linear type ultrasound motor | |
| Hsiao et al. | Single-phase drive linear ultrasonic motor with perpendicular electrode vibrator | |
| JPS62259485A (en) | Piezoelectric driving apparatus | |
| CN102810997B (en) | Anti-friction drive-type ultrasonic motor and composite stator component thereof | |
| CN102301500A (en) | Piezoelectric motor | |
| CN104716864A (en) | Linear piezoelectric motor of inertia type middle-sized structure and control method thereof | |
| CN210629372U (en) | Piezoelectric planar motor based on stator drive of frame plate structure | |
| CN105553328A (en) | Piezoelectric vibrating peristaltic motor | |
| CN105305874A (en) | Rib plate-excited displacement type longitudinal-torsional composite ultrasonic motor | |
| JPH08242592A (en) | Ultrasonic actuator | |
| King | Application of mechanical amplifiers in piezoelectric actuators |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |