CN104779834B - External ratchet wheel type piezoelectric actuator - Google Patents
External ratchet wheel type piezoelectric actuator Download PDFInfo
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- CN104779834B CN104779834B CN201510205548.4A CN201510205548A CN104779834B CN 104779834 B CN104779834 B CN 104779834B CN 201510205548 A CN201510205548 A CN 201510205548A CN 104779834 B CN104779834 B CN 104779834B
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- China
- Prior art keywords
- ratchet
- main shaft
- ratchet wheel
- foreign steamer
- piezoelectric bimorph
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to an external ratchet wheel type piezoelectric actuator. The actuator is mainly composed of an outer wheel, a fixing main shaft, a ratchet wheel, a pawl and a piezoelectric bimorph. The ratchet wheel is connected with and fixedly installed on the fixing main shaft through a key, and the outer wheel is assembled on the fixing main shaft through a bearing. The ratchet wheel is of a spoke type structure. A metal substrate and a piezoelectric wafer are bonded to form the piezoelectric bimorph so that a ratchet wheel spoke part symmetric in appearance can be formed. A drive element, namely a piezoelectric bimorph oscillator, takes a symmetrical square wave as an excitation signal, and the piezoelectric bimorph oscillator quickly deforms to generate periodical two-way impact force so that the ratchet wheel can slightly swing in two directions, and accordingly the outer wheel is driven to rotate in one direction through a ratchet wheel transmission mechanism, and the precise actuator rotating directionally is formed. The actuator has the advantages of being simple in mechanical structure, low in cost, easy to control, high in resolution ratio and the like.
Description
Technical field
The invention belongs to Precision Piezoelectric Mechanical Driven field, relate to a kind of novel piezoelectric precision driver.
Background technology
The piezoelectric actuator utilizing piezoelectric element to work have big stroke, resolution height, compact conformation, response characteristic good,
Without electromagnetic interference, the advantage such as easily controllable, at photovoltaic assembling, micro-precision optical machinery, the micro-manufacture of accurate device, Ultra-precision Turning
Increasingly extensive application is obtained in field.
In recent years, the piezoelectric inertia impact formula that piezoelectric actuator made driver element in particular with piezoelectric bimorph drives
The research of device is flourish trend, utilizes asymmetrical signal of telecommunication excitation piezoelectric bimorph to produce different impulsive forces, is formed
Driver directed movement, owing to have employed asymmetrical signals excitation, therefore driving control system is more complicated, is unfavorable for microminiature collection
Cheng Hua, and then cost is the most of a relatively high.
In view of proposing as the problem existing for the piezoelectric actuator of driver element, the present invention currently with piezoelectric bimorph
A kind of external ratchet-type piezoelectric actuator, this driver have employed answering that original for Piezoelectric Driving mechanism combines with machine driving
Close transmission mode so that drive control signal is used to control relatively simple symmetric block signal, has broken conventional piezoelectric
Driver can only use the present situation controlling complex asymmetric sawtooth signal, it is possible to makes actuator component performance period
The intermittent movement of property.
Summary of the invention
It is an object of the invention to provide a kind of novel external ratchet-type piezoelectric actuator, used to solve existing piezoelectricity
Property precision driver the asymmetric waveform signal of telecommunication can only be used as driving signal, driving control system is complicated, high the asking of cost
Topic.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
Described foreign steamer (1) is assembled together by bearing (3) with fixed main shaft (4), and foreign steamer (1) deviates from the one of ratchet (6)
Being shaped with convex shoulder in side wheel hub bore so that location bearing (3), foreign steamer (1) wheel bore uses interference to be connected with bearing (3).
Described ratchet (6) is spoke structure, and the spoke of the upper symmetrical configuration of ratchet (6) is by piezoelectric bimorph (9) and ratchet
(6) metal basal board on is constituted.
Described piezoelectric bimorph (9) uses conducting resinl mutually bonding with the metal basal board on ratchet (6).
Have keyway on described fixed main shaft (4), ratchet (6) by with fixed main shaft (4) use bonded by the way of solid
It is contained on fixed main shaft (4).
Described ratchet (7) is connected with foreign steamer (1) by securing members (8) such as bolt, nut, pads, and the diameter of bolt is bigger
Side uses matched in clearance slightly larger than ratchet (7) width, bolt with ratchet (7) without external screw thread and length.
Described spring (2) is used for making ratchet (7) keep contacting with ratchet (6), reliable to ensure that ratchet mechanism works
Property.
Described substrate (10) keeps stablizing of driver for supportive body, substrate (10) has and fixed main shaft (4)
The installing hole adapted.
Present invention have the advantage that: utilize ratchet structure transmission to solve conventional piezoelectric inertia impact precision driver
The problem that the asymmetric waveform signal of telecommunication relatively having difficult labour raw drives can only be used so that driving control system is simplified, except this it
Outward, the piezoelectric actuator using the present invention to provide, also there is frame for movement simple, the feature such as low cost.
Accompanying drawing explanation
Fig. 1 is the isometric view in front of the present invention.
Fig. 2 is the isometric view (without substrate) at the back side of the present invention.
Fig. 3 is the structural blast figure of the present invention.
Fig. 4 is the front view of the ratchet portions of the present invention.
Detailed description of the invention
With reference to Fig. 1, Fig. 2 and Fig. 3, the present invention external ratchet-type piezoelectric actuator is mainly by foreign steamer (1), spring (2), axle
Hold (3), fixed main shaft (4), key (5), ratchet (6), ratchet (7), securing member (8), piezoelectric bimorph (9), substrate (10) composition.
During assembling, the external screw thread one end that has of described fixed main shaft (4) is first made to be fixed on described substrate (10)；Key (5) is put into fixing
In keyway on main shaft (4), then by ratchet (6) that structure is radial by with fixed main shaft (4) with solid by the way of bonded
It is contained on fixed main shaft (4)；Bearing (3) is loaded on fixed main shaft (4), then foreign steamer (1) is pacified in the way of interference connection
Being contained on bearing (3), bearing (3) two ends should be fully contacted between not staying with the convex shoulder of fixed main shaft (4) end face and foreign steamer (1) respectively
Gap；Being connected on the most successively on ratchet (6) by ratchet (7), ratchet (7) keeps contacting not staying gap, simultaneously with the flank of tooth of ratchet (6)
Using securing member (8) to be connected with foreign steamer (1) by ratchet (7), nut shim etc. screws in bolt and compresses foreign steamer with male thread portion
(1), foreign steamer (1) opposite side end face middle with bolt compresses and does not stay gap；Ratchet (7) and foreign steamer (1) should slightly retain certain between
Gap, ratchet (7) and bolt use matched in clearance to ensure that ratchet (7) can slide from ratchet (6) flank of tooth；Spring (2) is depended on
Secondary by the spring guide loading on foreign steamer (1), spring (2) and ratchet (7) keep being fully contacted, and assembling i.e. completes.
With reference to Fig. 2 and Fig. 4, every piece of metal basal board and piezoelectric bimorph (9) on spoke structure ratchet (6) constitute structure
Symmetrical spoke, during the work of the present invention external ratchet-type piezoelectric actuator, all piezoelectric bimorphs (9) are at the symmetrical wave signal of telecommunication
Excitation is lower to be swung simultaneously in the same direction, and when piezoelectric bimorph (9) swings counterclockwise, twin lamella (9) is in ratchet
Being formed centrally torque counterclockwise, ratchet (7) just stretches into the between cog of a certain tooth of ratchet (6), and ratchet (6) promotes ratchet (7) thus carries
Dynamic foreign steamer (1) turns over certain angle.Piezoelectric bimorph (9) the most back swings subsequently, is centrally formed ratchet suitable
Hour hands torque, ratchet (7) slips on this back of tooth of ratchet (6), jumps to, on ratchet (6) other teeth, thus complete a week
Phase is circulated.Described driver is i.e. driven foreign steamer (1) by the two-way small sway back and forth of piezoelectric bimorph (9) and then is realized grand
Continuous rotation in sight.
With reference to Fig. 1, the geomery of substrate (10) is not fixed, and reaches to keep the stable effect of whole driver i.e.
Can, can directly contact fixing with vertical contact surface by screw etc..
Claims (1)
1. an external ratchet-type piezoelectric actuator, described driver is mainly by foreign steamer (1), spring (2), bearing (3), fixing master
Axle (4), key (5), ratchet (6), ratchet (7), securing member (8), piezoelectric bimorph (9), substrate (10) form；Wherein foreign steamer (1)
Be assembled together by bearing (3) with fixed main shaft (4), foreign steamer (1) be shaped with in deviating from the side wheel bore of ratchet (6) convex shoulder with
Just positioning bearing (3), foreign steamer (1) wheel bore uses interference to be connected with bearing (3)；Fixed main shaft has keyway, ratchet on (4)
(6) by with fixed main shaft (4) use bonded by the way of be packed on fixed main shaft (4)；Ratchet (7) by bolt, nut,
The securing members such as pad (8) are connected with foreign steamer (1), and the bigger side of the diameter of bolt is slightly larger than ratchet (7) width without external screw thread and length,
Bolt uses matched in clearance with ratchet (7)；Spring (2) is loaded by the spring guide on foreign steamer (1) and keeps filling with ratchet (7)
Tap is touched；Fixed main shaft (4) has external screw thread one end to be fixed on substrate (10)；It is characterized in that: described ratchet (6) is radial
Metal basal board on structure, piezoelectric bimorph (9) and ratchet (6) constitutes the spoke of symmetrical configuration, piezoelectric bimorph (9) and ratchet
(6) metal basal board on uses conducting resinl mutually bonding；During piezoelectric bimorph (9) work, ratchet (6) is caused to produce two-way small pendulum
Dynamic, under the cooperation of click drive mechanism and then drive foreign steamer (1) to produce one-directional rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510205548.4A CN104779834B (en) | 2015-04-28 | 2015-04-28 | External ratchet wheel type piezoelectric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510205548.4A CN104779834B (en) | 2015-04-28 | 2015-04-28 | External ratchet wheel type piezoelectric actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104779834A CN104779834A (en) | 2015-07-15 |
| CN104779834B true CN104779834B (en) | 2017-01-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510205548.4A Expired - Fee Related CN104779834B (en) | 2015-04-28 | 2015-04-28 | External ratchet wheel type piezoelectric actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104779834B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108791539A (en) * | 2018-06-05 | 2018-11-13 | 广东工业大学 | A kind of regulating device of macro micro- combination |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365700B (en) * | 2018-02-12 | 2020-07-17 | 合肥工业大学 | Novel ultra-light ultra-silent driver |
| CN108609157A (en) * | 2018-06-05 | 2018-10-02 | 广东工业大学 | Aircraft movable wing regulating device based on Piezoelectric Driving |
| CN114050736B (en) * | 2021-11-26 | 2023-06-16 | 浙江师范大学 | Flow vibration-rotation type friction generator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0899180A (en) * | 1994-09-30 | 1996-04-16 | Mitsubishi Heavy Ind Ltd | Device for driving weaver for welding |
| US8297421B2 (en) * | 2009-11-17 | 2012-10-30 | GM Global Technology Operations LLC | Active materials actuated one-way clutch |
| CN102570900B (en) * | 2012-01-18 | 2014-09-17 | 哈尔滨工业大学 | Piezoelectric-type stepping rotation driver |
| CN103916044B (en) * | 2014-04-04 | 2016-04-06 | 郑州大学 | A kind of double-layer gear pushes away rotary piezoelectirc nanomotor mutually |
-
2015
- 2015-04-28 CN CN201510205548.4A patent/CN104779834B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108791539A (en) * | 2018-06-05 | 2018-11-13 | 广东工业大学 | A kind of regulating device of macro micro- combination |
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|---|---|
| CN104779834A (en) | 2015-07-15 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20170428 |
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| CF01 | Termination of patent right due to non-payment of annual fee |