CN104900573B - A kind of differential lever micro-displacement amplifying device of symmetrical expression - Google Patents
A kind of differential lever micro-displacement amplifying device of symmetrical expression Download PDFInfo
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- CN104900573B CN104900573B CN201510311979.9A CN201510311979A CN104900573B CN 104900573 B CN104900573 B CN 104900573B CN 201510311979 A CN201510311979 A CN 201510311979A CN 104900573 B CN104900573 B CN 104900573B
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Abstract
The present invention provides a kind of differential lever micro-displacement amplifying device of symmetrical expression, including pedestal, the substrate and the piezoelectric blocks in the same plane with the substrate being fixed on the pedestal, the piezoelectric blocks tool is there are one top splenium and two respectively positioned at the top splenium both ends and symmetrically placed driving section centered on the perpendicular bisector of the top splenium, two driving sections are connected to one group of lever assembly in the same plane with the substrate, and lever assembly is symmetrically placed centered on the perpendicular bisector of the top splenium described in two groups, the piezoelectric ceramic actuator supported in the top splenium is placed between two driving sections；By setting lever assembly, using the principle of differential lever amplification, larger displacement equations multiple is realized, with larger stroke, simultaneously because the mode for employing flexible, hinged is attached, the gap and frictional force between each rod piece are smaller, error can be reduced, precision is higher.
Description
Technical field
The present invention relates to a kind of amplifying device, especially a kind of differential lever micro-displacement amplifying device of symmetrical expression.
Background technology
In recent years, with the development of microelectric technique, piezoelectric ceramics with its superior precision actuation and positioning performance and by
Micro-displacement Driving and precision positioning field are widely used in, but since its micron-sized displacement output tends not to meet in fact
The demand of border application generally requires design displacement amplification device and carries out displacement equations to it.Existing displacement amplification device or
Precision is higher or stroke is larger, is difficult in high precision often to get both with big stroke.
Chinese invention patent application ZL03132498.3 discloses a kind of micro displacement magnifying mechanism, by mechanism body, piezoelectricity
Ceramics and tightening cushion composition, piezoelectric ceramics and tightening cushion be arranged in mechanism body, piezoelectric ceramics and tightening cushion
Inner face is in close contact between each other, the outer end face of piezoelectric ceramics and tightening cushion respectively with the left and right side walls of mechanism body
Inner surface is in close contact, and there are angularly disposed left and right support plate, the left and right branch of upper and lower in the upper and lower part of mechanism body respectively
Upper and lower micro-shifting kinetoplast is respectively equipped between board, the both ends of left and right support plate are moved respectively with left and right side walls and upper and lower micro-shifting
Body is connected structure.The enlarger stroke is relatively small, while in the case of load gravity center bias, easily to piezoelectric bar
Cause failure by shear.
In view of this, the present inventor conducts in-depth research micro-displacement amplifying device, there is this case generation then.
The content of the invention
A kind of differential lever micro-displacement amplification of the symmetrical expression larger and higher precision it is an object of the invention to provide stroke
Device.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of differential lever micro-displacement amplifying device of symmetrical expression, including pedestal, the substrate being fixed on the pedestal and with
Substrate piezoelectric blocks in the same plane, the piezoelectric blocks tool is there are one top splenium and two respectively positioned at the top pressure
Portion both ends and symmetrically placed driving section centered on the perpendicular bisector of the top splenium, two driving sections are connected to one
The group lever assembly in the same plane with the substrate, and lever assembly described in two groups using the perpendicular bisector of the top splenium as
Central symmetry is placed, and the piezoelectric ceramic actuator supported in the top splenium is placed between two driving sections；
Each driving section is respectively provided with the pull rod that one end is connected with the top splenium and one end is fixed with the pull rod
Connection and parallel with the top splenium respectively the first push rod and the second push rod, between first push rod and the top splenium
Distance is less than the distance between second push rod and the top splenium；
Each lever assembly respectively include first connecting rod, respectively and one end perpendicular with the top splenium respectively with it is described
The first strut and the second strut of first connecting rod flexible, hinged, one end and the second of the other end flexible, hinged of first strut
Connecting rod, one end and the third connecting rod of the other end flexible, hinged of second strut and soft with the other end of the second connecting rod
Property the hinged and fixed block that is fixed on the pedestal, one end flexible hinge of the first connecting rod is connected to output rod, and described the
The distance between flexible, hinged position and first strut between one connecting rod and the output rod are less than and described second
The distance between bar, the shaft of the second connecting rod and one end flexible, hinged of first push rod away from the pull rod, it is described
The other end of third connecting rod and one end flexible, hinged of second push rod away from the pull rod, and the shaft of the third connecting rod
With the substrate flexible, hinged.
As a modification of the present invention, the first connecting rod of lever assembly described in two groups and the same output rod are soft
Property is hinged.
As a modification of the present invention, above-mentioned each flexible, hinged is hinged by flexible hinge.
As a modification of the present invention, it is provided with to pre-tighten the piezoelectric ceramic actuator in institute on the substrate
State the adjusting screw in top splenium.
As a modification of the present invention, panel is further included, the panel is fixedly connected with the output rod.
Above-mentioned technical proposal is used, the invention has the advantages that：
1st, by setting lever assembly, using the principle of differential lever amplification, realize larger displacement equations multiple, have
Larger stroke, simultaneously because the mode for employing flexible, hinged is attached, the gap and frictional force between each rod piece are smaller,
Error can be reduced, precision is higher.
2nd, as a result of symmetrical structure, horizontal additional displacement is eliminated from principle, avoids generating shearing force, effectively
Improve displacement accuracy.
3rd, between by the way that piezoelectric ceramic actuator is arranged in two driving sections, body that is compact-sized and causing whole device
Product is relatively small.
Description of the drawings
Fig. 1 is the structure diagram of the symmetrical differential lever micro-displacement amplifying device of the present invention, clipped part in figure；
Fig. 2 is the decomposition diagram of the symmetrical differential lever micro-displacement amplifying device of the present invention.
It is as follows that correspondence is indicated in figure：
10- pedestals；20- substrates；
21- adjusting screws；30- piezoelectric blocks；
31- top spleniums；32- driving sections；
32a- pull rods；The first push rods of 32b-；
The second push rods of 32c-；40- lever assemblies；
41- first connecting rods；The first struts of 42-；
The second struts of 43-；44- second connecting rods；
45- third connecting rods；46- fixed blocks；
47- output rods；50- panels.
Specific embodiment
The present invention is described further in the following with reference to the drawings and specific embodiments.
As depicted in figs. 1 and 2, the differential lever micro-displacement amplifying device of symmetrical expression provided in this embodiment, including pedestal 10,
The substrate 20 and the piezoelectric blocks 30 in the same plane with substrate 20 being fixed on pedestal 10, substrate 20 and 30 place of piezoelectric blocks
Plane it is parallel with pedestal 10, the fixed form of substrate 20 and pedestal 10 can be conventional mode, as using screw fastening
Mode is no longer described in detail herein.
The tool of piezoelectric blocks 30 is located at 31 both ends of top splenium and to hang down in top splenium 31 respectively there are one top splenium 31 and two
Symmetrically placed driving section 32 centered on line.The concrete shape of top splenium 31 can determine according to actual needs, in the present embodiment
In, top splenium 31 is in direct rod shape.Piezoelectric blocks 30 are preferably integrally formed part.
Two driving sections 32 are connected to one group of lever assembly in the same plane with substrate 20 and piezoelectric blocks 30
40, and two groups of lever assemblies 40 are also symmetrically placed centered on the perpendicular bisector of top splenium 31.Horizontal stroke can be so eliminated from principle
To additional displacement, avoid generating shearing force during work, effectively increase displacement accuracy.
The piezoelectric ceramic actuator (not depending on going out in figure) supported in top splenium 31, piezoelectricity are placed between two driving sections 32
Ceramic driver is conventional parts, and the displacement input perpendicular to top splenium 31 can be provided to top splenium 31.
Each driving section 32, which is respectively provided with the pull rod 32a that one end is connected with top splenium 31 and one end and is fixed with pull rod 32a, to be connected
It connects and the first parallel with top splenium 31 respectively push rod 32b and the second push rod 32c, between the first push rod 32b and top splenium 31
Distance be less than the distance between the second push rod 32b and top splenium 31, specific distance can according to required for device displacement enlargement
Multiple be determined.In the present embodiment, arranged between the first push rod 32b, the second push rod 32c and pull rod 32a in " F " type.
Each lever assembly 40 includes first connecting rod 41 respectively, and one end perpendicular with top splenium 31 connects respectively with first respectively
The first strut 42 and the second strut 43 of 41 flexible, hinged of bar, one end connect with the second of the other end flexible, hinged of the first strut 42
The other end flexibility of bar 44, one end with the third connecting rod 45 of the other end flexible, hinged of the second strut 43 and with second connecting rod 44
Fixed block 46 that is hinged and being fixed on pedestal 10.One end flexible hinge of first connecting rod 41 is connected to output rod 47, and first connecting rod
The distance between flexible, hinged position and the first strut 42 between 41 and output rod 47 are less than it between the second strut 43
Distance.One end flexible, hinged of the shaft of second connecting rod 44 and the first push rod 32b away from pull rod 32a, third connecting rod 45 it is another
End and one end flexible, hingeds of the second push rod 32c away from pull rod 32a, and the shaft of third connecting rod 45 and 20 flexible, hinged of substrate.
It should be noted that one end of each rod piece signified in above description or the other end are general to one kind of relative position
Description is included, not merely refers to the end position of rod piece, is further included on corresponding rod piece close to the shaft part of the end position.
In addition, above-mentioned each flexible, hinged is all hinged preferably by flexible hinge.
Preferably, in the present embodiment, the first connecting rod 41 of two groups of lever assemblies 40 and same 47 flexible, hinged of output rod,
Avoid generating the precision of shearing force influence amplifying device.
Preferably, in the present embodiment, it is provided with to pre-tighten piezoelectric ceramic actuator in top splenium 31 on substrate 20
On adjusting screw 21.So it is conveniently adjusted position and the pretightning force of piezoelectric ceramic actuator.
Preferably, in the present embodiment, panel 50 is further included, panel 50 is fixedly connected with output rod 47, it can be achieved that displacement
The output diversity of amplification.
Preferably, in the present embodiment, substrate 20, piezoelectric blocks 30, lever assembly 40 and output rod 47 are processed for integral type
The parts of acquisition, substrate 20, piezoelectric blocks 30, lever assembly 40 and output rod 47 after so processing need not be assembled,
Rigging error is reduced, improves amplification precision.
In use, piezoelectric ceramic actuator input displacement, by the top splenium 31 of piezoelectric blocks 30 toward away from Piezoelectric Ceramic
The direction of device promotes, and top splenium 31 drives driving section 32 to move together, then respectively by flexible, hinged the of driving section 32
One push rod 32b and the second connecting rod 44 on the second push rod 32c and the generation leverage of third connecting rod 45 so that the first strut 42 produces
The raw movement identical with 31 direction of motion of top splenium, the second strut 42 generate the movement opposite with 31 direction of motion of top splenium, put
Big displacement, finally by the leverage of first connecting rod 41, again displacement enlargement, and being exported displacement by output rod 47
Onto panel 50.
The present invention is described in detail above in conjunction with attached drawing, but embodiments of the present invention be not limited in it is above-mentioned
Embodiment, those skilled in the art can make the present invention various modifications according to the prior art, such as will be in above-described embodiment
Output rod 47 and panel 50 integrated parts etc. are set, these belong to protection scope of the present invention.
Claims (5)
1. a kind of differential lever micro-displacement amplifying device of symmetrical expression, which is characterized in that including pedestal, be fixed on the pedestal
Substrate and the piezoelectric blocks in the same plane with the substrate, there are one top spleniums and two to be located at respectively for piezoelectric blocks tool
The top splenium both ends and symmetrically placed driving section centered on the perpendicular bisector of the top splenium, two driving section difference
One group of lever assembly in the same plane with the substrate is connected with, and lever assembly described in two groups is with the top splenium
It is symmetrically placed centered on perpendicular bisector, it is placed with the Piezoelectric Ceramic supported in the top splenium between two driving sections
Device；
Each driving section is respectively provided with the pull rod that one end is connected with the top splenium and one end is fixedly connected with the pull rod
And first push rod and second push rod parallel with the top splenium respectively, the distance between first push rod and the top splenium
Less than the distance between second push rod and the top splenium；
Each lever assembly includes first connecting rod respectively, and one end perpendicular with the top splenium be respectively with described first respectively
The first hinged strut of flexibility of linking rod and the second strut, one end connect with the second of the other end flexible, hinged of first strut
The other end flexibility of bar, one end with the third connecting rod of the other end flexible, hinged of second strut and with the second connecting rod
Fixed block that is hinged and being fixed on the pedestal, the fixed block are located at the corresponding first connecting rod and the second connecting rod
Between, for the second connecting rod between the corresponding fixed block and first push rod, one end of the first connecting rod is soft
Property is hinged with output rod, and between flexible, hinged position between the first connecting rod and the output rod and first strut
Distance the distance between be less than with described second strut, the shaft of the second connecting rod is with first push rod away from the drawing
One end flexible, hinged of bar, the other end of the third connecting rod and one end flexible hinge of second push rod away from the pull rod
It connects, and the shaft of the third connecting rod and the substrate flexible, hinged.
2. symmetrical differential lever micro-displacement amplifying device as described in claim 1, which is characterized in that lever group described in two groups
The first connecting rod of part and the same output rod flexible, hinged.
3. symmetrical differential lever micro-displacement amplifying device as claimed in claim 2, which is characterized in that above-mentioned each flexible, hinged
All it is to be hinged by flexible hinge.
4. the differential lever micro-displacement amplifying device of symmetrical expression as described in any claim in claim 1-3, feature exist
In being provided with the piezoelectric ceramic actuator pre-tightening adjusting screw in the top splenium on the substrate.
5. the differential lever micro-displacement amplifying device of symmetrical expression as described in any claim in claim 1-3, feature exist
In further including panel, the panel is fixedly connected with the output rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510311979.9A CN104900573B (en) | 2015-06-09 | 2015-06-09 | A kind of differential lever micro-displacement amplifying device of symmetrical expression |
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| CN201510311979.9A CN104900573B (en) | 2015-06-09 | 2015-06-09 | A kind of differential lever micro-displacement amplifying device of symmetrical expression |
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| CN104900573B true CN104900573B (en) | 2018-05-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782674B (en) * | 2017-02-07 | 2022-10-25 | 广东工业大学 | Micro-displacement amplifier and nano positioning device |
| CN106975961A (en) * | 2017-05-19 | 2017-07-25 | 广东工业大学 | A kind of long stroke fast tool servo |
| CN107414477B (en) * | 2017-08-18 | 2019-03-15 | 天津大学 | A kind of driving type piezoelectric actuator Two-degree-of-freedohigh-precision high-precision microoperation clamper |
| CN108406738B (en) * | 2018-02-27 | 2020-11-20 | 天津大学 | Two-degree-of-freedom micro-gripper |
| CN110739256A (en) * | 2019-10-28 | 2020-01-31 | 华侨大学 | micro-displacement amplifying devices |
| CN113941899B (en) * | 2021-05-18 | 2022-12-16 | 齐鲁工业大学 | Fast cutter servo device and application thereof in high-speed high-precision curved surface machining |
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| CN1570567A (en) * | 2003-07-11 | 2005-01-26 | 哈尔滨工业大学博实精密测控有限责任公司 | Micro displacement amplifying mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3817120B2 (en) * | 2000-07-07 | 2006-08-30 | 住友重機械工業株式会社 | Displacement control method for moving table, member processing method, XY stage device, and method for manufacturing the XY stage device |
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| CN1570567A (en) * | 2003-07-11 | 2005-01-26 | 哈尔滨工业大学博实精密测控有限责任公司 | Micro displacement amplifying mechanism |
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| 基于GMM和柔性铰链的大位移微致动器设计与研究;江晓阳;《中国优秀硕士学位论文全文数据库·工程科技Ⅱ辑》;20110930(第9期);第C030-1页 * |
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Inventor after: Fan Wei Inventor after: Zhan Wei Inventor after: Li Zhongshen Inventor after: Yang Jianhong Inventor after: Chen Mei Inventor after: Jiang Fangbin Inventor before: Fan Wei Inventor before: Jiang Fangbin Inventor before: Li Zhongshen |
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