CN101902153B - Linear piezoelectric motor - Google Patents
Linear piezoelectric motor Download PDFInfo
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- CN101902153B CN101902153B CN2010102368999A CN201010236899A CN101902153B CN 101902153 B CN101902153 B CN 101902153B CN 2010102368999 A CN2010102368999 A CN 2010102368999A CN 201010236899 A CN201010236899 A CN 201010236899A CN 101902153 B CN101902153 B CN 101902153B
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- piezoelectric motor
- ceraminator
- linear piezoelectric
- friction member
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Abstract
The invention discloses a linear piezoelectric motor, relates to a motor and provides the linear piezoelectric motor which can improve the working efficiency of the piezoelectric motor and reduce the work driving voltage. The linear piezoelectric motor is provided with a fixed frame, a piezoelectric element, a friction pair and a frictional secondary pre-stressed member, wherein the piezoelectric element is arranged on the fixed frame; the friction pair is provided with a driving friction piece and a driven friction piece; the driving friction piece is arranged on the ceramic piezoelectric element; the driven friction piece is arranged on the fixed frame and matched with the driving friction piece by friction; the piezoelectric element is provided with a ceramic substrate and electrodes; the ceramic substrate has the shape of a spline shaft; the ceramic substrate in the shape of the spline shaft is provided with at least four tooth slots; one electrode is arranged in each tooth slot; and the frictional secondary pre-stressed member is arranged on the fixed frame and tightly presses the ceramic piezoelectric element.
Description
Technical field
The present invention relates to a kind of motor, especially relate to a kind of piezoelectric ceramic motor that is mainly used in the microminiaturization of miniature portable electronic product.
Background technology
Piezo-electric motor is as a kind of brand-new driver, with low speed high torque, big static holding torque, response speed is fast, volume weight is little, simple in structure and do not have advantages such as electromagnetic interference and receive extensive concern both domestic and external, and obtained application in various fields.Piezo-electric motor can have straight line output or rotation output; In the piezo-electric motor in existing technology with straight line output; Generally all be to make electrode on the piezoelectric element surface, though this structure is easy to make and operation, the operating efficiency that exists piezoelectric element is lower; Need bigger task driven voltage, be unfavorable for applying of piezo-electric motor.The technology of relevant linear piezoelectric motor has some reports:
Publication number is that the application for a patent for invention of CN101741277A discloses a kind of linear piezoelectric motor, includes base, stator and slide block, and bearings is passed through in the bottom of slide block; Stator is an annular stator; Include annulus metal derby and annulus piezoelectric ceramic, also be provided with the metal driving angle that offsets with slide block on the metal derby, piezoelectric ceramic equally spaced is provided with 4m subregion along circumference; M is a positive integer; Per two adjacent subregions are that one group of electrode and polarised direction are identical, and the two adjacent groups polarization of electrode is in the opposite direction, and the metal driving angle is arranged on any one group of electrode; Half of all subregions of piezoelectric ceramic is connected with driving voltage, and the subregion that is connected with driving voltage was provided with for the circle spacing along piezoelectric ceramic.
Notification number is that the utility model patent of CN201398155 provides a kind of linear piezoelectric motor, comprises stator module and mover assembly, and stator module is made up of vibrating arm and the piezoelectric ceramics block a and the piezoelectric ceramics block b that are pasted on the vibrating arm two ends; Mover assembly is one to be clamped in the friction apply member on the vibrating arm; Two ends at piezoelectric ceramics block a and piezoelectric ceramics block b are coated with electrode respectively; Stator module and mover assembly are in contact with one another and can be in certain thrust lower slider.When piezo-electric motor was fed alternating voltage certain in the ultrasonic frequency range, the stator of motor produced ultrasonic vibration, through 20 motions of frictional force drives friction apply member.
Summary of the invention
The purpose of this invention is to provide a kind of operating efficiency that improves piezo-electric motor, reduce the linear piezoelectric motor of task driven voltage.
The present invention is provided with fixed mount, piezoelectric element, friction pair and friction pair preload piece; Piezoelectric element is located on the fixed mount, and friction pair is provided with initiatively friction member and by dynamic friction piece, initiatively friction member is located on the ceraminator, by dynamic friction piece be located on the fixed mount and with active friction member frictional fit; Piezoelectric element is provided with ceramic matrix and electrode, ceramic matrix be shaped as the splined shaft shape, the ceramic matrix of splined shaft shape is provided with at least 4 teeth groove, in each teeth groove, all establishes electrode, said friction pair preload piece is located on the fixed mount and is compressed ceraminator.
Said fixed mount can be provided with base and pressing plate, and base is provided with the ceraminator support, and the ceraminator support is used to support ceraminator, and pressing plate is positioned at the support top, and pressing plate is used for pressure and touches ceraminator.
Said ceramic matrix be shaped as the splined shaft that the splined shaft shape can be geometries such as column type splined shaft or prism splined shaft.
The ceramic matrix of said splined shaft shape is provided with 4n teeth groove at least, and n is an integer.
Said electrode preferably is coated in the teeth groove inner surface.
Said active friction member can be processed with carried out the high-abrasive material that small area contact by dynamic friction piece by ball, short pole etc., and initiatively friction member and said ceramic matrix bond.
Saidly be preferably the shaft-like friction member of needle roller shape friction member or plane, be installed in the stopper slot of being located on the base through ball bearing by dynamic friction piece by dynamic friction piece.Said ball bearing is provided with the 2 row's balls that are arranged in parallel, and 2 row's balls place the ball grooves of parallel symmetry set on the base respectively, and every row's ball is provided with at least 3 balls, and each ball of 2 row's balls all cooperates with the rolling friction of needle roller shape friction member.Said stopper slot is stopper slot radially, and radially stopper slot preferably is made up of the arc-shaped slot of 2 coaxial arrangement in front and back, and radially stopper slot is used for being moved by the radially spacing and axial straight line of dynamic friction piece.
Said friction pair preload piece is preferably spring leaf, and spring leaf preferably compresses said ceraminator through pressing plate.
Compare with prior art; The present invention is made as the splined shaft shape with the shape of ceramic matrix; Electrode is located in each teeth groove, and the piezoelectric element of this structure can effectively improve the polarization area of piezoelectric ceramic, and then improves the operating efficiency of piezo-electric motor; Under the situation of the identical strength of output, can use lower voltage to realize driving.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the STRUCTURE DECOMPOSITION sketch map of the embodiment of the invention 1.
Fig. 3 is the structural representation (column type, 4 teeth groove) of the piezoelectric element of the embodiment of the invention 1.
Fig. 4 is the structural representation (column type, 8 teeth groove) of the piezoelectric element of the embodiment of the invention 2.
Fig. 5 is the structural representation (8 prisms, 4 teeth groove) of the piezoelectric element of the embodiment of the invention 3.
Embodiment
Embodiment 1
Referring to Fig. 1～3, the present invention is provided with fixed mount (comprise base 11 with pressing plate 12), piezoelectric element 2, friction pair (comprise initiatively friction member 31 and by dynamic friction piece 32) and spring leaf 4.
When the piezoelectric ceramic motor was polarized, relative therein pair of electrodes fed high voltage direct current, and pair of electrodes ground connection is polarized to motor with this in addition.During drive pressure electroceramics motor, the pumping signal that inserts on the pair of electrodes therein be Vsin ω t ,-Vsin ω t, in addition pair of electrodes insert Vcos ω t ,-Vcos ω t, form two pairs of AC driving signals thus with 90 ° of phase differences.When direction of an electric field was consistent with polarised direction, pottery was along the polarised direction elongation, and ceramic rod shortens along its length simultaneously, otherwise pottery shortens along polarised direction, and ceramic rod extends along its length simultaneously.Because the drive voltage signal of input is two group pulse signals with 90 ° of phase differences; So ceramic rod produces deformation alternately on the both direction of quadrature; Finally make the active friction member 31 that is bonded on the ceramic matrix do elliptic motion, drive and done rectilinear motion by dynamic friction piece 32.
The quantity of ceramic matrix 21 set teeth groove 211 of the present invention can change as required, is that 4 integral multiple quantity all can.
Referring to Fig. 4, similar with embodiment 1, difference only is: the ceramic matrix 21 ' of ceraminator 2 ' is provided with 8 teeth groove 211 ', in 8 teeth groove 211 ', all is arranged with electrode 22 ' (constituting four pairs of electrodes).Label 31 ' is ball (an initiatively friction member).
Embodiment 3
Referring to Fig. 5, similar with embodiment 1 and 2, the difference only be: ceraminator 2 " ceramic matrix 21 " be 8 prism splined shaft shapes.At ceramic matrix 21 " 8 sides on be equipped with teeth groove 211 ", at 8 teeth groove 211 " in all be arranged with electrode 22 " (constituting four pairs of electrodes).Label 31 " be ball (initiatively friction member).
Claims (10)
1. a linear piezoelectric motor is characterized in that being provided with fixed mount, piezoelectric element, friction pair and friction pair preload piece; Piezoelectric element is located on the fixed mount, and friction pair is provided with initiatively friction member and by dynamic friction piece, initiatively friction member is located on the ceraminator, by dynamic friction piece be located on the fixed mount and with active friction member frictional fit; Piezoelectric element is provided with ceramic matrix and electrode; Ceramic matrix be shaped as the splined shaft shape, the ceramic matrix of splined shaft shape is provided with at least 4 teeth groove, in each teeth groove, all establishes electrode; Said friction pair preload piece is located on the fixed mount, and compresses ceraminator.
2. a kind of linear piezoelectric motor as claimed in claim 1; It is characterized in that fixed mount is provided with base and pressing plate, base is provided with the ceraminator support, ceraminator stent support ceraminator; Pressing plate is positioned at ceraminator support top, and pressing plate is pressed and touched ceraminator.
3. a kind of linear piezoelectric motor as claimed in claim 1 is characterized in that said splined shaft shape is column type splined shaft shape or prism splined shaft shape.
4. a kind of linear piezoelectric motor as claimed in claim 1 is characterized in that the ceramic matrix of said splined shaft shape is provided with 4n teeth groove at least, and n is an integer.
5. a kind of linear piezoelectric motor as claimed in claim 1 is characterized in that said electrode is coated in the teeth groove inner surface.
6. a kind of linear piezoelectric motor as claimed in claim 1 is characterized in that said active friction member adopts ball or short pole, initiatively friction member and said ceramic matrix bonding.
7. a kind of linear piezoelectric motor as claimed in claim 1, it is characterized in that said is the shaft-like friction member of needle roller shape friction member or plane by dynamic friction piece, is installed in the stopper slot of being located on the base through ball bearing by dynamic friction piece.
8. a kind of linear piezoelectric motor as claimed in claim 7; It is characterized in that said ball bearing is provided with the 2 row's balls that are arranged in parallel; 2 row's balls place the ball grooves of parallel symmetry set on the base respectively; Every row's ball is provided with at least 3 balls, and each ball of 2 row's balls all cooperates with the rolling friction of needle roller shape friction member.
9. a kind of linear piezoelectric motor as claimed in claim 7 is characterized in that said stopper slot is stopper slot radially, and radially stopper slot is made up of the arc-shaped slot of 2 coaxial arrangement in front and back.
10. a kind of linear piezoelectric motor as claimed in claim 1 is characterized in that said friction pair preload piece is a spring leaf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102368999A CN101902153B (en) | 2010-07-23 | 2010-07-23 | Linear piezoelectric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102368999A CN101902153B (en) | 2010-07-23 | 2010-07-23 | Linear piezoelectric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101902153A CN101902153A (en) | 2010-12-01 |
| CN101902153B true CN101902153B (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102368999A Active CN101902153B (en) | 2010-07-23 | 2010-07-23 | Linear piezoelectric motor |
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| Country | Link |
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| CN (1) | CN101902153B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102429492A (en) * | 2010-12-08 | 2012-05-02 | 苏州嘉言能源设备有限公司 | Self-heating mattress |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2563563B2 (en) * | 1989-03-14 | 1996-12-11 | 松下電器産業株式会社 | Ultrasonic linear motor |
| JP2874174B2 (en) * | 1989-02-28 | 1999-03-24 | ブラザー工業株式会社 | Ultrasonic transducer and ultrasonic motor |
| CN101753056A (en) * | 2008-12-15 | 2010-06-23 | 财团法人工业技术研究院 | Piezoelectric motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63294281A (en) * | 1987-05-25 | 1988-11-30 | Hiroshi Shimizu | Piezoelectric driving device |
| JP2674566B2 (en) * | 1995-05-02 | 1997-11-12 | 日本電気株式会社 | Cylindrical transducer and method for manufacturing the same |
| US7170214B2 (en) * | 2003-09-08 | 2007-01-30 | New Scale Technologies, Inc. | Mechanism comprised of ultrasonic lead screw motor |
| DE102008023478A1 (en) * | 2007-11-08 | 2009-05-14 | Physik Instrumente (Pi) Gmbh & Co. Kg | Ultrasonic linear drive with hollow cylindrical oscillator |
-
2010
- 2010-07-23 CN CN2010102368999A patent/CN101902153B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2874174B2 (en) * | 1989-02-28 | 1999-03-24 | ブラザー工業株式会社 | Ultrasonic transducer and ultrasonic motor |
| JP2563563B2 (en) * | 1989-03-14 | 1996-12-11 | 松下電器産業株式会社 | Ultrasonic linear motor |
| CN101753056A (en) * | 2008-12-15 | 2010-06-23 | 财团法人工业技术研究院 | Piezoelectric motor |
Non-Patent Citations (4)
| Title |
|---|
| JP昭63-294281A 1988.11.30 |
| JP特开平8-307994A 1996.11.22 |
| JP第2563563号B2 1996.12.11 |
| JP第2874174号B2 1999.03.24 |
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| CN101902153A (en) | 2010-12-01 |
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