CN103441701A - Clamping-holding type linear type piezoelectric actuator - Google Patents
Clamping-holding type linear type piezoelectric actuator Download PDFInfo
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- CN103441701A CN103441701A CN2013103308147A CN201310330814A CN103441701A CN 103441701 A CN103441701 A CN 103441701A CN 2013103308147 A CN2013103308147 A CN 2013103308147A CN 201310330814 A CN201310330814 A CN 201310330814A CN 103441701 A CN103441701 A CN 103441701A
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Abstract
The invention discloses a clamping-holding type linear type piezoelectric actuator which comprises a guide rail, a supporting portion, a flexible elastic sheet and a piezoelectric stack. The supporting portion is composed of a first supporting pin and a second supporting pin and is used for supporting the guide rail. The flexible elastic sheet is arranged between the first supporting pin and the second supporting pin. The piezoelectric stack is embedded in an open hole of the flexible elastic sheet. Relative movement can be produced between the first supporting pin and the guide rail and between the second supporting pin and the guide rail. According to the clamping-holding type linear type piezoelectric actuator, the piezoelectric stack is adopted to serve as a drive source, a clamping-holding device of a special structure is adopted, the outage self-locking function is achieved, and linear motion of a driven object can be achieved. The clamping-holding type linear type piezoelectric actuator of the structure has the advantages of being simple in structure, small in size, easy to miniaturize, strong in interference resisting capacity, convenient to install, strong in operability, wide in adjustable range and the like. The application of the linear type piezoelectric actuator in the reality field is facilitated, and development of piezoelectric actuators is boosted.
Description
Technical field
The present invention relates to a kind of piezoelectric actuator, particularly a kind of linear piezoelectric driver that utilizes piezoelectric stack to drive, belong to the piezoelectricity application.
Background technology
Piezoelectric actuator is compared with conventional motors, the advantage such as have that simple in structure, small-size light-weight, fast response time, noise are low, low speed high torque, control characteristics are good, cut off self-lock, move accurately, also have the characteristics that low temperature resistant, vacuum etc. adapts to space environment in addition.But, still there are the problems such as structural compactness is not enough, assembly difficulty is high, operability is weak, control precision is low, stability is poor, adjustable extent is narrow in linear piezoelectric driver of the prior art, has hindered to a certain extent the development process of piezoelectric actuator.Traditional Inchworm type piezoelectric actuator adopts piezoelectric stack to power up clamp, in motion process, require clamping institution that large clamp power is provided enough, simultaneously because the distortion of piezoelectric stack is less, the slight deformation of contact-making surface will affect clamp power, thereby affected the performance of linear piezoelectric driver, for this has proposed very high requirement to machining and assembling, its promotion and application have been affected.
Piezoelectric actuator receives the concern of increasing Chinese scholars in recent years, and development situation is considerable, has application prospect quite widely.With respect to traditional electromagnetic motor, this kind of linear piezoelectric driver not only has piezoelectric actuator to have advantages of, and can realize the rectilinear motion of driven object in linear electric motor, adopt improved clamping institution to realize the outage clamp, make motor have low to machining and matching requirements, actuating force large, can handling height, manufacturing cost than low, be easy to the advantages such as design, symmetrical configuration, working face are many, low in energy consumption, long service life.
Summary of the invention
Technical problem
The technical problem to be solved in the present invention is to provide a kind of clipping linear piezoelectric driver, and this piezoelectric actuator adopts piezoelectric stack as drive source, and adopts the clamping device of special construction.Effectively raise the control precision of piezoelectric actuator, and simple in structure, be easy to assembling, can be handling strong, antijamming capability is strong.
Technical scheme
In order to solve above-mentioned technical problem, clipping linear piezoelectric driver of the present invention comprises guide rail, the support portion be comprised of the first leg, the second leg, flexible shell fragment and piezoelectric stack, support portion is for guide rail support, wherein, described flexible shell fragment is arranged between the first leg and the second leg and two ends are connected with the second leg with the first leg respectively; Described piezoelectric stack is embedded in the perforate of flexible shell fragment; Described the first leg has the first leg body be connected with guide rail and extends first, second supporting leg of the first leg body, and the surface that first, second supporting leg is relative is respectively equipped with first, second electromagnet; Described the second leg has the second leg body be connected with guide rail and extends the 3rd, the 4th supporting leg of the second leg body, and the 3rd, the 4th relative surface of supporting leg is respectively equipped with the 3rd, the 4th electromagnet; Can produce relative motion between described the first leg body and the second leg body and guide rail.Wherein, when applying driving voltage, the electromagnet that each supporting leg apparent surface arranges in free state, do not produce the effect of active force between electromagnet.
Further, the first end of described flexible shell fragment is bolted on the first leg body by first, and its second end is bolted on the second leg body by second.
Further, described first, second bolt and the contacted surface of piezoelectric stack are sphere.When fastening bolt, the bolt sphere with piezoelectric stack, contact between surface produce one along bolt shaft to friction force, in order to strengthen the frictional force between itself and piezoelectric stack, the contacted surface of bolt and piezoelectric stack adopts the sphere design, has effectively prevented that piezoelectric stack is loosening.
Further, described piezoelectric stack and the contacted end face of first, second bolt scribble respectively high performance conduction insulating material.
Further, described the first leg body has the first U-shaped breach towards the surface of guide rail, and the surface that deviates from guide rail has the second U-shaped breach, and the first U-shaped breach is not communicated with and is connected by the first connecting bridge with the second U-shaped breach; The second leg body has the 3rd U-shaped breach towards the surface of guide rail, the surface that deviates from guide rail has the 4th U-shaped breach, and the 3rd U-shaped breach is not communicated with and is connected by the second connecting bridge with the 4th U-shaped breach.In each leg body, two U-shaped breach form a lever construction with connecting bridge therebetween, and wherein said connecting bridge is equivalent to the fulcrum of lever.
Further, be provided with preloading spring between described the first leg body and the second leg body, described preloading spring two ends are fixed on the first U-shaped breach and the 3rd U-shaped indentation, there by set bolt respectively, for the first U-shaped breach and the 3rd U-shaped breach both sides provide pretightning force.
Further, the position that described guide rail is corresponding with the first U-shaped breach and the 3rd U-shaped breach is provided with projection.When this installs in a state of nature, described projection is embedded in the first U-shaped breach and the 3rd U-shaped breach.Due to the effect of preloading spring, the first, the 3rd U-shaped breach two side produces a pressure-acting to the projection of guide rail, thereby the first leg, the second leg are locked in to the projection of guide rail certainly.
The specific works process of the clipping linear piezoelectric driver of technical solution of the present invention is as follows:
When being continuously applied driving voltage to described piezoelectric stack, piezoelectric stack is made stretching motion along self length direction, and piezoelectric stack produces a thrust to the first leg, the second leg, thereby drives the stretching motion of flexible shell fragment.The first electromagnet of being provided with then only to the first supporting leg and the second electromagnet on the second supporting leg apply driving voltage, the 4th electromagnet that the 3rd electromagnet that the 3rd supporting leg is provided with and the 4th supporting leg are provided with is still in first beginning and end operating state, the first electromagnet and the second electromagnet that are applied with driving voltage produce a graviational interaction at its contact-making surface place, the second U-shaped breach acts in breach and shrinks at this active force, this gravitation acts on the first U-shaped breach by connecting bridge, the first U-shaped breach expands outwardly under the effect of this active force, the projection of the first leg and guide rail is separated, make the first leg in released state, the first leg under released state travels forward under the thrust of piezoelectric stack, elongation strain occurs in flexible shell fragment under the effect of this active force simultaneously.Then stop first, second electromagnet is applied to driving voltage, the 4th electromagnet that the 3rd electromagnet of being provided with only to the 3rd supporting leg and the 4th supporting leg are provided with applies driving voltage, first after outage
,the second electromagnet quits work, the first leg certainly locks in guide rail under the pretightning force effect of preloading spring, three, the 4th electromagnet obtains driving voltage and enters operating state, three, the 4th electromagnet is to producing a graviational interaction at its contact-making surface place, this gravitation acts on the 3rd U-shaped breach by connecting bridge, the 3rd U-shaped breach expands outwardly under the effect of this active force, the projection of the second leg and guide rail is separated, and the second leg in released state travels forward under the effect of the expansion force of the thrust of piezoelectric stack and the flexible shell fragment in elongation state.By control circuit, so circulate and apply the driving signal to these linear electric motors, just can realize the rectilinear motion of this piezoelectric actuator.
The clipping linear piezoelectric driver of technical solution of the present invention also can adopt the scheme of more simplifying, soon the second electromagnet, the 4th electromagnet replace with metal derby, utilize driving voltage to make the second, the 4th electromagnet produce magnetic, metal derby is produced to graviational interaction, thereby drive guide rail movement.
By piezoelectric stack and the control driving voltage of changing different capacity, can realize the adjusting to the output drive strength square size of this linear piezoelectric driver, thereby realize the application of this kind of linear piezoelectric driver in various occasions.
Beneficial effect
The clipping linear piezoelectric driver of technical solution of the present invention adopts the clamping device of piezoelectric stack as drive source and special construction, has the function of cutting off self-lock, and can realize the rectilinear motion of driven object.The advantage such as that the linear piezoelectric driver of this kind of structure has is simple in structure, volume littlely is easy to microminiaturization, antijamming capability is strong, easy for installation, workable and adjustable extent is wide, contribute to the application of linear piezoelectric driver in field of reality, advanced piezoelectric actuator development.
The accompanying drawing explanation
Fig. 1 is clipping rectilinear motion piezoelectric actuator stand bar structure schematic diagram of the present invention;
Fig. 2 is clipping rectilinear motion piezoelectric actuator piezoelectric stack schematic diagram of the present invention;
Fig. 3 is clipping rectilinear motion piezoelectric actuator flexible pellet chip architecture schematic diagram of the present invention;
The first embodiment assembling front view that Fig. 4 (a) is clipping rectilinear motion piezoelectric actuator of the present invention;
Fig. 4 (b) assembles left view for the first embodiment of clipping rectilinear motion piezoelectric actuator of the present invention;
The second embodiment schematic diagram that Fig. 5 is clipping rectilinear motion piezoelectric actuator of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described.
Embodiment mono-:
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the clipping rectilinear motion piezoelectric actuator of the present embodiment comprises guide rail 1, the support portion 3, flexible shell fragment 6 and the piezoelectric stack 7 that are comprised of the first leg 4, the second leg 9, wherein, described flexible shell fragment 6 is arranged between the first leg 4 and the second leg 9 and two ends are connected with crus secunda 9 with the first leg 4 respectively; Described piezoelectric stack 7 is embedded in the perforate of flexible shell fragment 6; Described the first leg 4 has the first leg body 41 be connected with guide rail 1 and the first supporting leg 411 that extends the first leg body 41, second supporting leg the 411 ', the first supporting leg 411, left surface 310 and right surperficial 311 that the second supporting leg 411 ' is relative is respectively equipped with the first electromagnet 12, the second electromagnet 15; Described the second leg 9 has the second leg body 91 be connected with guide rail 1 and the 3rd supporting leg 911, the 4th supporting leg 911 ' that extends the second leg body 91, and the 3rd supporting leg 911, the left surface 310 ' and right surperficial 311 ' that the 4th supporting leg 911 ' is relative are respectively equipped with the 3rd electromagnet 12 ' the 4th electromagnet 15 '; Each electromagnet is arranged in the installing hole 38 on each supporting leg by hexagon socket head cap screw 11; Can produce relative motion between described the first leg body 41 and the second leg body 91 and guide rail 1.
As shown in Figure 3, the flexible shell fragment of the present embodiment 6 adopts metal material or the processing of high molecular material that elastic strengths are high to make, and in the middle of it, coupling part is provided with the through hole 62 of some given shapes, as circular, oval or similar other shapes; The first end face 61 and second end face 63 of flexible shell fragment 6 are respectively equipped with screwed hole, as shown in Fig. 3, Fig. 4 (a), the mode that is bolted its first end face 61 is fixed in the first leg body 41, the second end faces 63 and is bolted mode and is fixed in the second leg body 91.
As shown in Fig. 4 (a), described the first bolt 2 and the second bolt 2 ' are sphere with the contacted surface of piezoelectric stack 7.
As shown in Figure 2, contacted two end faces 71,73 of described piezoelectric stack 7 and the first bolt 2 and the second bolt 2 ' scribble respectively high performance conduction insulating material.Described piezoelectric stack 7 upper surfaces 72 are coated with the easy conductive dielectric layer, during piezoelectric stack 7 energising, polarize along its length, along self length direction, make stretching motion, and piezoelectric stack 7 quantity are to be more than or equal to 1 natural number.
As shown in Fig. 1, Fig. 4, described the first leg body 41 has the first U-shaped breach 35 towards the surface of guide rail 1, the surface that deviates from guide rail 1 has the second U-shaped breach 39, the first U-shaped breach 35 and is not communicated with the second U-shaped breach 39 and is connected by the first connecting bridge 37; The second leg body 91 has the 3rd U-shaped breach 35 ' towards the surface of guide rail 1, the surface that deviates from guide rail 1 has the 4th U-shaped breach the 39 ', three U-shaped breach 35 ' and is not communicated with the 4th U-shaped breach 39 ' and is connected by the second connecting bridge 37 '.The first leg 4, the second leg 9 scribble material that one deck can self-lubricating as lubricating oil towards the surface 33 of guide rail.
As shown in Fig. 1, Fig. 4, be provided with preloading spring 5 between described the first leg body 41 and the second leg body 91, described preloading spring 5 two ends are fixed on the first U-shaped breach 35 by set bolt 8 respectively and the 3rd U-shaped breach 35 ' is located, and are that the first U-shaped breach 35 and the 3rd U-shaped breach 35 ' both sides provide pretightning force.
As shown in Fig. 4 (b), the position that described guide rail 1 is corresponding with the first U-shaped breach 35 and the 3rd U-shaped breach 35 ' is provided with projection 13.
When not applying driving voltage, electromagnet 12, 12 ' and electromagnet 15, do not produce active force between 15 ', when applying driving voltage, electromagnet 12, 12 ' and electromagnet 15, the 15 ' magnetic produced at the contact-making surface place is different, produce a graviational interaction between electromagnet 12 and electromagnet 12 ', U-shaped breach on the leg body is subject to the effect distortion of this gravitation, produce interaction with the projection 13 on guide rail 1, checker between the state of locking and release, alternately to electromagnet 12, 12 ' and electromagnet 15, 15 ' applies driving voltage, thereby can drive guide rail and carry out rectilinear motion.
Embodiment bis-:
As shown in Figure 5, the clipping rectilinear motion piezoelectric actuator of another kind of embodiment is provided, most is identical for its structure and embodiment, the electromagnet that different is on each supporting leg arranges different, respectively be provided with electromagnet 512,512 ' and corresponding metal derby 515,515 ', when electromagnet 512,512 ' is applied to driving voltage, electromagnet 512,512 ' and corresponding metal derby 515,515 ' between produce graviational interaction, play equally the effect that guide rail is produced to actuating force.Described metal derby 515,515 ' adopts the materials processing that the magnetic conductivity such as iron, cobalt, nickel are strong to make.
Claims (7)
1. a clipping linear piezoelectric driver, it is characterized in that, comprise guide rail (1), the support portion (3) formed by the first leg (4), the second leg (9), flexible shell fragment (6) and piezoelectric stack (7), wherein, described flexible shell fragment (6) is arranged between the first leg (4) and the second leg (9) and two ends are connected with the second leg (9) with the first leg (4) respectively; Described piezoelectric stack (7) is embedded in the perforate of flexible shell fragment (6); Described the first leg (4) has the first leg body (41) be connected with guide rail (1) and first, second supporting leg (411 that extends the first leg body (41), 411 '), the relative surface of first, second supporting leg (411,411 ') is respectively equipped with first, second electromagnet; Described the second leg (9) has the second leg body (91) be connected with guide rail (1) and extends the 3rd, the 4th supporting leg (911 of the second leg body (91), 911 '), three, the 4th relative surface of supporting leg (911,911 ') is respectively equipped with the 3rd, the 4th electromagnet; Can produce relative motion between described the first leg body (41) and the second leg body (91) and guide rail (1).
2. clipping linear piezoelectric driver as claimed in claim 1, it is characterized in that, it is upper that the first end of described flexible shell fragment (6) is fixed on the first leg body (41) by the first bolt (2), and its second end is fixed on the second leg body (91) by the second bolt (2 ').
3. clipping linear piezoelectric driver as claimed in claim 2, is characterized in that, described first, second bolt (2,2 ') is sphere with the contacted surface of piezoelectric stack (7).
4. clipping linear piezoelectric driver as claimed in claim 3, is characterized in that, described piezoelectric stack (7) scribbles respectively high performance conduction insulating material with contacted two end faces of first, second bolt (2,2 ') (71,73).
5. clipping linear piezoelectric driver as claimed in claim 1, it is characterized in that, described the first leg body (41) has the first U-shaped breach (35) towards the surface of guide rail (1), the surface that deviates from guide rail (1) has the second U-shaped breach (39), and the first U-shaped breach (35) is not communicated with and is connected by the first connecting bridge (37) with the second U-shaped breach (39); The second leg body (91) has the 3rd U-shaped breach (35 ') towards the surface of guide rail (1), the surface that deviates from guide rail (1) has the 4th U-shaped breach (39 '), and the 3rd U-shaped breach (35 ') is not communicated with the 4th U-shaped breach (39 ') and is connected by the second connecting bridge (37 ').
6. clipping linear piezoelectric driver as claimed in claim 1, it is characterized in that, be provided with preloading spring (5) between described the first leg body (41) and the second leg body (91), the screwed hole (36 that the first U-shaped breach (35) and the 3rd U-shaped breach (35 ') are located is fixed in by set bolt (8) respectively in described preloading spring (5) two ends, 36 '), in, be that the first U-shaped breach (35) and the 3rd U-shaped breach (35 ') both sides provide pretightning force.
7. as claim 5 or the described clipping linear piezoelectric driver of 6 any one, it is characterized in that, the position that described guide rail (1) is corresponding with the first U-shaped breach (35) and the 3rd U-shaped breach (35 ') is provided with projection (13), and described projection (13) can be embedded in the first U-shaped breach (35) and the 3rd U-shaped breach (35 ').
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103308147A CN103441701A (en) | 2013-07-31 | 2013-07-31 | Clamping-holding type linear type piezoelectric actuator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103308147A CN103441701A (en) | 2013-07-31 | 2013-07-31 | Clamping-holding type linear type piezoelectric actuator |
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| CN2013103308147A Pending CN103441701A (en) | 2013-07-31 | 2013-07-31 | Clamping-holding type linear type piezoelectric actuator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111216108A (en) * | 2020-03-03 | 2020-06-02 | 中国科学院光电技术研究所 | Multi-state parallel multi-degree-of-freedom motion platform based on piezoelectric drive |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07314356A (en) * | 1994-05-20 | 1995-12-05 | Fanuc Ltd | Linear actuator |
| CN1619938A (en) * | 2004-11-16 | 2005-05-25 | 清华大学 | Ultra magnetostrictive high precision linear driver using piezozelectric effect clamping |
| CN203554327U (en) * | 2013-07-31 | 2014-04-16 | 南京航空航天大学 | Clamping-type linear piezoelectric driver |
-
2013
- 2013-07-31 CN CN2013103308147A patent/CN103441701A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07314356A (en) * | 1994-05-20 | 1995-12-05 | Fanuc Ltd | Linear actuator |
| CN1619938A (en) * | 2004-11-16 | 2005-05-25 | 清华大学 | Ultra magnetostrictive high precision linear driver using piezozelectric effect clamping |
| CN203554327U (en) * | 2013-07-31 | 2014-04-16 | 南京航空航天大学 | Clamping-type linear piezoelectric driver |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111216108A (en) * | 2020-03-03 | 2020-06-02 | 中国科学院光电技术研究所 | Multi-state parallel multi-degree-of-freedom motion platform based on piezoelectric drive |
| CN111216108B (en) * | 2020-03-03 | 2022-10-18 | 中国科学院光电技术研究所 | Multi-state parallel multi-degree-of-freedom motion platform based on piezoelectric drive |
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Application publication date: 20131211 |