CN108063563A - A kind of two-way piezoelectric actuator - Google Patents
A kind of two-way piezoelectric actuator Download PDFInfo
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- CN108063563A CN108063563A CN201810029488.9A CN201810029488A CN108063563A CN 108063563 A CN108063563 A CN 108063563A CN 201810029488 A CN201810029488 A CN 201810029488A CN 108063563 A CN108063563 A CN 108063563A
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- 210000001699 lower leg Anatomy 0.000 claims abstract description 90
- 210000002414 leg Anatomy 0.000 claims abstract description 64
- 239000000463 material Substances 0.000 claims abstract description 48
- 239000002783 friction material Substances 0.000 claims abstract description 39
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 10
- 125000004122 cyclic group Chemical group 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 239000000919 ceramic Substances 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 11
- 230000005611 electricity Effects 0.000 description 7
- 230000007306 turnover Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- 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
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- 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
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- 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
- H02N2/005—Mechanical details, e.g. housings
- H02N2/0065—Friction interface
- H02N2/007—Materials
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- 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
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Abstract
The present invention relates to a kind of two-way piezoelectric actuator, including：Piezoelectric vibrator, the first support leg, the second support leg, the 3rd support leg, the first foot bearing and crus secunda bearing, wherein：Support leg is arranged in piezoelectric vibrator lower surface, and foot bearing is connected to support leg free end, and foot bearing is combined by section for fan-shaped high coefficient of friction material and low friction coefficient materials.Its cyclic bending is deformed to applying biasing alternating voltage on piezoelectric vibrator, drives wherein bipod bearing close to each other or separate.In foot bearing moving process, the material of different coefficients of friction is in contact respectively with working face on foot bearing, so that foot bearing generates different displacements, the final displacement for realizing driver.The present invention realizes bi-directional drive, and has the advantages that the service life that simple in structure, maintenance cost is low, the requirement to working face is relatively low and extends piezoelectric ceramics in driver.
Description
Technical field
The invention belongs to Piezoelectric Driving fields, and in particular to a kind of two-way piezoelectric actuator.
Background technology
Traditional driver has the characteristics that impulse stroke is big, movement velocity is fast and bearing capacity is big, but legacy drive
Bulky and Motion Resolution rate is not high.It is contemporary with scientific technological advance, micromachine, accurate measurement and biologic medical are all
Higher requirement is proposed to mini drive, it is desirable that mini drive must realize small size and high-precision.New micro drive
Dynamic device is mainly driven using marmem, magnetostriction materials, electrostriction material and piezoelectric ceramics.Wherein, press
Electric drive mini drive has the advantages that positioning accuracy height, fast response time, electromagnetism interference, small power consumption and driving force are big,
Existing piezoelectric actuator mainly has the driving of looper type and two class of inertial drive, but this two quasi-drivers structure is complex, more
It is high to operating environment requirements with working face rigid contact, component is easily lost and is not easy to replace.
The content of the invention
It is complex in order to solve current piezoelectric actuator structure, mostly with working face rigid contact, to operating environment requirements
The problem of component is not easy to replace easily is lost, it is proposed that a kind of two-way piezoelectric actuator, the driver is by piezoelectric vibrator, first in height
Support leg, the second support leg, the first foot bearing and crus secunda bearing are formed, wherein the piezoelectric vibrator is glued by piezoelectric sheet material
It is attached on Rectangular Elastic matrix and forms, first support leg and the second support leg are for identical rectangular tab component and with one
Fixed elasticity, described first support leg one end be arranged in piezoelectric vibrator lower surface, the other end be free end, second support leg
One end is connected to piezoelectric vibrator lower surface, the other end is free end, and the first foot bearing and crus secunda bearing are all cylinder
Component, the first foot bearing is by the first high coefficient of friction material that section is sector and the first low friction system that section is sector
Number Material claddings form, and the crus secunda bearing by section is fan-shaped the second low friction coefficient materials and section is fan-shaped the
Two high coefficient of friction material are combined, and the free end of first support leg is connected with the first foot bearing, second support
The free end of leg is connected with crus secunda bearing.Driver is placed on working face, the first foot bearing and crus secunda branch
Seat is contacted with working face.Driver the first foot bearing is by two fan-shaped high coefficient of friction material and a low friction coefficient materials
It is bonded, crus secunda bearing is bonded by two fan-shaped low friction coefficient materials and a high coefficient of friction material, described
Apply biasing alternating voltage on piezoelectric vibrator and bring it about cyclic bending deformation, drive wherein bipod bearing close to each other or mutual
It is separate.In foot bearing moving process, foot bearing is subject to the frictional force opposite with moving direction, and frictional force makes foot bearing and support
Certain twisting occurs for leg, the material of different coefficients of friction on foot bearing is promoted to be in contact respectively with working face, so that foot branch
Seat generates different displacements, the final displacement for realizing driver.The positive mobile working principle schematic of the driver is such as
Shown in Fig. 2：When piezoelectric vibrator is not powered on, driver is in nature, and support leg and foot bearing do not twist, such as Fig. 2 (a)
It is shown；Lead to forward dc electricity to piezoelectric vibrator, piezoelectric vibrator generates certain concave change shape, drives the first foot bearing and crus secunda
Bearing is located remotely from each other, and working at the same time the frictional force of plane generation makes the support leg at piezoelectric vibrator both ends and foot bearing that certain turn round occur
It is dynamic, cause the first foot bearing turn over counterclockwise low-angle to high coefficient of friction material and low friction coefficient materials corresponds to bonding place and
Working face contacts, and crus secunda bearing turns over low-angle to high coefficient of friction material and low friction coefficient materials and corresponds to bonding clockwise
Place is contacted with working face, as shown in Fig. 2 (b)；Piezoelectric vibrator is driven with alternating voltage at this time, piezoelectric vibrator continues to generate concave change shape
When, the first foot bearing and crus secunda bearing is driven to be located remotely from each other, the frictional force for working at the same time plane generation continues to make the first piezoelectricity
Certain twisting occurs for the support leg and foot bearing at oscillator both ends, causes the high coefficient of friction material of the first foot bearing and crus secunda branch
The low friction coefficient materials of seat are contacted with working face, and the skidding distance of crus secunda bearing is significantly greater than the cunning of the first foot bearing at this time
Distance is moved, as shown in Fig. 2 (c)；When piezoelectric vibrator, which is powered, generates convex deformation, drive the first foot bearing and crus secunda bearing mutual
Close, the direction that working face generates at this time changes, and the support leg and foot bearing of piezoelectric vibrator both sides are produced respectively
Raw certain negative direction twisting, causes the low friction coefficient materials of the first foot bearing and the high coefficient of friction material of crus secunda bearing
It is contacted with working face, the skidding distance of the first foot bearing is significantly greater than the skidding distance of crus secunda bearing at this time, such as Fig. 2 (d) institutes
Show；A working cycles are completed when piezoelectric vibrator turns again to logical direct current offset position, as shown in Fig. 2 (e).It shakes in piezoelectricity
In a cycle of sub- energization cyclic bending deformation, drive the first foot bearing and crus secunda bearing be located remotely from each other or close to each other,
When the first foot bearing and crus secunda bearing are located remotely from each other, larger sliding occurs for crus secunda bearing, and when the first foot bearing and
When crus secunda bearing is close to each other, larger sliding occurs for the first foot bearing, therefore can be produced in a power cycles inner driver
A raw step-length to the right.The reverse movement operation principle schematic diagram of the driver is as shown in Figure 3：When piezoelectric vibrator is not powered on
When, driver is in nature, and support leg and foot bearing do not twist, as shown in Fig. 3 (a)；Lead to one reversely to piezoelectric vibrator
Direct current, piezoelectric vibrator generate certain convex deformation, drive the first foot bearing and crus secunda bearing close to each other, work at the same time flat
The frictional force that face generates makes the support leg at piezoelectric vibrator both ends and foot bearing that certain twisting occur, and causes the first foot bearing clockwise
It turns over low-angle and corresponds to bonding place to high coefficient of friction material and low friction coefficient materials and contacted with working face, crus secunda bearing is inverse
Hour hands turn over low-angle and correspond to bonding place to high coefficient of friction material and low friction coefficient materials to be contacted with working face, such as Fig. 3 (b)
It is shown；Piezoelectric vibrator is driven with alternating voltage at this time, when piezoelectric vibrator continues to generate convex deformation, drives the first foot bearing and second
Foot bearing is close to each other, and the frictional force for working at the same time plane generation continues to make the support leg at the first piezoelectric vibrator both ends and foot bearing
Certain twisting occurs, causes the high coefficient of friction material of the first foot bearing and low friction coefficient materials and the work of crus secunda bearing
Face contacts, and the skidding distance of crus secunda bearing is significantly greater than the skidding distance of the first foot bearing at this time, as shown in Fig. 3 (c)；Work as pressure
When electric tachometer indicator energization generates concave change shape, the first foot bearing and crus secunda bearing is driven to be located remotely from each other, working face generates at this time
Direction changes, and the support leg and foot bearing of piezoelectric vibrator both sides generate certain negative direction twisting respectively, cause
The low friction coefficient materials of first foot bearing and the high coefficient of friction material of crus secunda bearing are contacted with working face, at this time the first foot
The skidding distance of bearing is significantly greater than the skidding distance of crus secunda bearing, as shown in Fig. 3 (d)；When piezoelectric vibrator turn again to it is logical
A working cycles are completed during direct current offset position, as shown in Fig. 3 (e).The one of the deformation of piezoelectric vibrator energization cyclic bending
In a cycle, the first foot bearing and crus secunda bearing is driven to be located remotely from each other or close to each other, when the first foot bearing and crus secunda branch
When seat is close to each other, larger sliding occurs for crus secunda bearing, and when the first foot bearing and crus secunda bearing are located remotely from each other, the
Larger sliding occurs for one foot bearing, therefore can generate a step-length to the left in a power cycles inner driver.Therefore work as
When piezoelectric vibrator is subject to the effect of forward bias alternating voltage, which realizes forward drive；When piezoelectric vibrator is subject to reversely partially
When putting alternating voltage effect, which realizes reverse drive.The present invention realizes bi-directional drive, and with simple in structure, dimension
Protect requirement at low cost, to working face it is relatively low and extend driver in piezoelectric ceramics service life the advantages of.
To achieve these goals, the present invention uses following technical scheme：
A kind of two-way piezoelectric actuator of the present invention, the driver is by piezoelectric vibrator, the first support leg, the second support leg, the
One foot bearing and crus secunda bearing are formed, wherein the piezoelectric vibrator is pasted onto structure on Rectangular Elastic matrix by piezoelectric sheet material
Into first support leg and the second support leg for identical rectangular tab component and have certain elasticity, described first
Support leg one end is arranged in piezoelectric vibrator lower surface, the other end is free end, and described second support leg one end is connected to piezoelectric vibrator
Lower surface, the other end are free end, and the first foot bearing and crus secunda bearing are all cylindrical member, the first foot bearing
It is that the first fan-shaped low friction coefficient materials are combined by the first high coefficient of friction material and section that section is sector, it is described
Crus secunda bearing is answered by the second low friction coefficient materials that section is sector and the second high coefficient of friction material that section is sector
It closes, the free end of first support leg is connected with the first foot bearing, the free end of second support leg and crus secunda
Bearing connects.
During work, driver is placed on working face, the first foot bearing and crus secunda bearing and working face
Contact.Driver the first foot bearing is bonded by two fan-shaped high coefficient of friction material and a low friction coefficient materials, the
Two foot bearings are bonded by two fan-shaped low friction coefficient materials and a high coefficient of friction material, are applied on the piezoelectric vibrator
Biasing puts alternating voltage and brings it about cyclic bending deformation, and wherein bipod bearing is close to each other or is located remotely from each other for drive.In foot branch
In seat moving process, foot bearing is subject to the frictional force opposite with moving direction, and frictional force makes foot bearing and support leg occur centainly
Twisting, the material of different coefficients of friction on foot bearing is promoted to be in contact respectively with working face so that foot bearing generate it is different
Displacement, the final displacement for realizing driver.The positive mobile working principle schematic of the driver is as shown in Figure 2：When
When piezoelectric vibrator is not powered on, driver is in nature, and support leg and foot bearing do not twist, as shown in Fig. 2 (a)；To pressure
Electric tachometer indicator leads to forward dc electricity, and piezoelectric vibrator generates certain concave change shape, drives the first foot bearing and crus secunda bearing mutual
Separate, working at the same time the frictional force of plane generation makes the support leg at piezoelectric vibrator both ends and foot bearing that certain twisting occur, and causes
First foot bearing turns over low-angle to high coefficient of friction material and low friction coefficient materials and corresponds to bonding place and working face counterclockwise
Contact, crus secunda bearing turn over low-angle to high coefficient of friction material and low friction coefficient materials and correspond to bonding place and work clockwise
Make face contact, as shown in Fig. 2 (b)；Piezoelectric vibrator is driven with alternating voltage at this time, when piezoelectric vibrator continues to generate concave change shape, band
Dynamic first foot bearing and crus secunda bearing are located remotely from each other, and the frictional force for working at the same time plane generation continues to make the first piezoelectric vibrator two
Certain twisting occurs for the support leg and foot bearing at end, cause the first foot bearing high coefficient of friction material and crus secunda bearing it is low
Friction coefficient material is contacted with working face, at this time the skidding distance of crus secunda bearing be significantly greater than the sliding of the first foot bearing away from
From as shown in Fig. 2 (c)；When piezoelectric vibrator, which is powered, generates convex deformation, the first foot bearing and crus secunda bearing is driven mutually to lean on
Closely, the direction that working face generates at this time changes, and the support leg and foot bearing of piezoelectric vibrator both sides generate respectively
Certain negative direction twisting, cause the low friction coefficient materials of the first foot bearing and the high coefficient of friction material of crus secunda bearing with
Working face contacts, and the skidding distance of the first foot bearing is significantly greater than the skidding distance of crus secunda bearing at this time, as shown in Fig. 2 (d)；
A working cycles are completed when piezoelectric vibrator turns again to logical direct current offset position, as shown in Fig. 2 (e).In piezoelectric vibrator
In a cycle of energization cyclic bending deformation, the first foot bearing and crus secunda bearing is driven to be located remotely from each other or close to each other, when
When first foot bearing and crus secunda bearing are located remotely from each other, larger sliding occurs for crus secunda bearing, and when the first foot bearing and the
When two foot bearings are close to each other, larger sliding occurs for the first foot bearing, therefore can be generated in a power cycles inner driver
One step-length to the right.The reverse movement operation principle schematic diagram of the driver is as shown in Figure 3：When piezoelectric vibrator is not powered on,
Driver is in nature, and support leg and foot bearing do not twist, as shown in Fig. 3 (a)；Lead to a reversed direct current to piezoelectric vibrator
Electricity, piezoelectric vibrator generate certain convex deformation, drive the first foot bearing and crus secunda bearing close to each other, work at the same time plane production
Raw frictional force makes the support leg at piezoelectric vibrator both ends and foot bearing that certain twisting occur, and the first foot bearing is caused to turn over clockwise
Low-angle corresponds to bonding place to high coefficient of friction material and low friction coefficient materials and is contacted with working face, and crus secunda bearing is counterclockwise
It turns over low-angle and corresponds to bonding place to high coefficient of friction material and low friction coefficient materials and contacted with working face, such as Fig. 3 (b) institutes
Show；Piezoelectric vibrator is driven with alternating voltage at this time, when piezoelectric vibrator continues to generate convex deformation, drives the first foot bearing and crus secunda
Bearing is close to each other, and the frictional force for working at the same time plane generation continues the support leg for making the first piezoelectric vibrator both ends and foot bearing hair
Raw certain twisting, causes the high coefficient of friction material of the first foot bearing and the low friction coefficient materials and working face of crus secunda bearing
Contact, the skidding distance of crus secunda bearing is significantly greater than the skidding distance of the first foot bearing at this time, as shown in Fig. 3 (c)；Work as piezoelectricity
When oscillator energization generates concave change shape, the first foot bearing and crus secunda bearing is driven to be located remotely from each other, what working face generated at this time rubs
It wipes force direction to change, the support leg and foot bearing of piezoelectric vibrator both sides generate certain negative direction twisting respectively, cause the
The low friction coefficient materials of one foot bearing and the high coefficient of friction material of crus secunda bearing are contacted with working face, at this time the first foot branch
The skidding distance of seat is significantly greater than the skidding distance of crus secunda bearing, as shown in Fig. 3 (d)；Lead to directly when piezoelectric vibrator turns again to
A working cycles are completed during galvanic electricity offset position, as shown in Fig. 3 (e).At one of the deformation of piezoelectric vibrator energization cyclic bending
In cycle, the first foot bearing and crus secunda bearing is driven to be located remotely from each other or close to each other, when the first foot bearing and crus secunda bearing
When close to each other, larger sliding occurs for crus secunda bearing, and when the first foot bearing and crus secunda bearing are located remotely from each other, first
Larger sliding occurs for foot bearing, therefore can generate a step-length to the left in a power cycles inner driver.Therefore when pressure
When electric tachometer indicator is subject to the effect of forward bias alternating voltage, which realizes forward drive；When piezoelectric vibrator is subject to reverse bias
When alternating voltage acts on, which realizes reverse drive.The present invention realizes bi-directional drive, and with simple in structure, maintenance
The advantages of requirement at low cost, to working face is relatively low and extends the service life of piezoelectric ceramics in driver.
Description of the drawings
Fig. 1 is a kind of two-way piezoelectric actuator structure diagram of the present invention.
Fig. 2 is a kind of two-way piezoelectric actuator forward drive process schematic of the present invention.
Fig. 3 is a kind of two-way piezoelectric actuator reverse drive process schematic of the present invention.
Specific embodiment
With reference to Fig. 1, Fig. 2 and Fig. 3, a kind of two-way piezoelectric actuator of this present invention be by piezoelectric vibrator 1, the first support leg 2,
Second support leg 3, the first foot bearing 4 and crus secunda bearing 5 form, wherein：
The piezoelectric vibrator 1 is pasted onto on Rectangular Elastic matrix by piezoelectric sheet material and formed, 2 He of the first support leg
For second support leg 3 for identical rectangular tab component and with certain elasticity, described first support leg, 2 one end is arranged in piezoelectricity
1 lower surface of oscillator, the other end are free end, and described second support leg, 3 one end is connected to 1 lower surface of piezoelectric vibrator, the other end is
Free end, the first foot bearing 4 and crus secunda bearing 5 are all cylindrical member, and the first foot bearing 4 is sector by section
The first high coefficient of friction material 41 and section be combined for the first fan-shaped low friction coefficient materials 42, the crus secunda branch
Seat 5 by section be fan-shaped the second low friction coefficient materials 51 and section be fan-shaped second high coefficient of friction material 52 it is compound and
Into the free end of first support leg 2 is connected with the first foot bearing 4, free end and the crus secunda branch of second support leg 3
Seat 5 connects.
During work, driver is placed on working face, the first foot bearing and crus secunda bearing and working face
Contact.Driver the first foot bearing is bonded by two fan-shaped high coefficient of friction material and a low friction coefficient materials, the
Two foot bearings are bonded by two fan-shaped low friction coefficient materials and a high coefficient of friction material, are applied on the piezoelectric vibrator
Biasing puts alternating voltage and brings it about cyclic bending deformation, and wherein bipod bearing is close to each other or is located remotely from each other for drive.In foot branch
In seat moving process, foot bearing is subject to the frictional force opposite with moving direction, and frictional force makes foot bearing and support leg occur centainly
Twisting, the material of different coefficients of friction on foot bearing is promoted to be in contact respectively with working face so that foot bearing generate it is different
Displacement, the final displacement for realizing driver.The positive mobile working principle schematic of the driver is as shown in Figure 2：When
When piezoelectric vibrator is not powered on, driver is in nature, and support leg and foot bearing do not twist, as shown in Fig. 2 (a)；To pressure
Electric tachometer indicator leads to forward dc electricity, and piezoelectric vibrator generates certain concave change shape, drives the first foot bearing and crus secunda bearing mutual
Separate, working at the same time the frictional force of plane generation makes the support leg at piezoelectric vibrator both ends and foot bearing that certain twisting occur, and causes
First foot bearing turns over low-angle to high coefficient of friction material and low friction coefficient materials and corresponds to bonding place and working face counterclockwise
Contact, crus secunda bearing turn over low-angle to high coefficient of friction material and low friction coefficient materials and correspond to bonding place and work clockwise
Make face contact, as shown in Fig. 2 (b)；Piezoelectric vibrator is driven with alternating voltage at this time, when piezoelectric vibrator continues to generate concave change shape, band
Dynamic first foot bearing and crus secunda bearing are located remotely from each other, and the frictional force for working at the same time plane generation continues to make the first piezoelectric vibrator two
Certain twisting occurs for the support leg and foot bearing at end, cause the first foot bearing high coefficient of friction material and crus secunda bearing it is low
Friction coefficient material is contacted with working face, at this time the skidding distance of crus secunda bearing be significantly greater than the sliding of the first foot bearing away from
From as shown in Fig. 2 (c)；When piezoelectric vibrator, which is powered, generates convex deformation, the first foot bearing and crus secunda bearing is driven mutually to lean on
Closely, the direction that working face generates at this time changes, and the support leg and foot bearing of piezoelectric vibrator both sides generate respectively
Certain negative direction twisting, cause the low friction coefficient materials of the first foot bearing and the high coefficient of friction material of crus secunda bearing with
Working face contacts, and the skidding distance of the first foot bearing is significantly greater than the skidding distance of crus secunda bearing at this time, as shown in Fig. 2 (d)；
A working cycles are completed when piezoelectric vibrator turns again to logical direct current offset position, as shown in Fig. 2 (e).In piezoelectric vibrator
In a cycle of energization cyclic bending deformation, the first foot bearing and crus secunda bearing is driven to be located remotely from each other or close to each other, when
When first foot bearing and crus secunda bearing are located remotely from each other, larger sliding occurs for crus secunda bearing, and when the first foot bearing and the
When two foot bearings are close to each other, larger sliding occurs for the first foot bearing, therefore can be generated in a power cycles inner driver
One step-length to the right.The reverse movement operation principle schematic diagram of the driver is as shown in Figure 3：When piezoelectric vibrator is not powered on,
Driver is in nature, and support leg and foot bearing do not twist, as shown in Fig. 3 (a)；Lead to a reversed direct current to piezoelectric vibrator
Electricity, piezoelectric vibrator generate certain convex deformation, drive the first foot bearing and crus secunda bearing close to each other, work at the same time plane production
Raw frictional force makes the support leg at piezoelectric vibrator both ends and foot bearing that certain twisting occur, and the first foot bearing is caused to turn over clockwise
Low-angle corresponds to bonding place to high coefficient of friction material and low friction coefficient materials and is contacted with working face, and crus secunda bearing is counterclockwise
It turns over low-angle and corresponds to bonding place to high coefficient of friction material and low friction coefficient materials and contacted with working face, such as Fig. 3 (b) institutes
Show；Piezoelectric vibrator is driven with alternating voltage at this time, when piezoelectric vibrator continues to generate convex deformation, drives the first foot bearing and crus secunda
Bearing is close to each other, and the frictional force for working at the same time plane generation continues the support leg for making the first piezoelectric vibrator both ends and foot bearing hair
Raw certain twisting, causes the high coefficient of friction material of the first foot bearing and the low friction coefficient materials and working face of crus secunda bearing
Contact, the skidding distance of crus secunda bearing is significantly greater than the skidding distance of the first foot bearing at this time, as shown in Fig. 3 (c)；Work as piezoelectricity
When oscillator energization generates concave change shape, the first foot bearing and crus secunda bearing is driven to be located remotely from each other, what working face generated at this time rubs
It wipes force direction to change, the support leg and foot bearing of piezoelectric vibrator both sides generate certain negative direction twisting respectively, cause the
The low friction coefficient materials of one foot bearing and the high coefficient of friction material of crus secunda bearing are contacted with working face, at this time the first foot branch
The skidding distance of seat is significantly greater than the skidding distance of crus secunda bearing, as shown in Fig. 3 (d)；Lead to directly when piezoelectric vibrator turns again to
A working cycles are completed during galvanic electricity offset position, as shown in Fig. 3 (e).At one of the deformation of piezoelectric vibrator energization cyclic bending
In cycle, the first foot bearing and crus secunda bearing is driven to be located remotely from each other or close to each other, when the first foot bearing and crus secunda bearing
When close to each other, larger sliding occurs for crus secunda bearing, and when the first foot bearing and crus secunda bearing are located remotely from each other, first
Larger sliding occurs for foot bearing, therefore can generate a step-length to the left in a power cycles inner driver.Therefore when pressure
When electric tachometer indicator is subject to the effect of forward bias alternating voltage, which realizes forward drive；When piezoelectric vibrator is subject to reverse bias
When alternating voltage acts on, which realizes reverse drive.The present invention realizes bi-directional drive, and with simple in structure, maintenance
The advantages of requirement at low cost, to working face is relatively low and extends the service life of piezoelectric ceramics in driver.
Claims (1)
1. a kind of two-way piezoelectric actuator, including：Piezoelectric vibrator (1), the first support leg (2) and the second support leg (3), feature
It is to further include and realizes the first foot bearing (4) of bi-directional drive and crus secunda bearing (5)；Wherein described piezoelectric vibrator (1) is by pressing
Electric sheeting is pasted onto on Rectangular Elastic matrix and forms, and first support leg (2) and the second support leg (3) are identical square
Shape sheet members and with certain elasticity, described first support leg (2) one end are arranged in piezoelectric vibrator (1) lower surface, another
It holds as free end, described second support leg (3) one end is connected to piezoelectric vibrator (1) lower surface, the other end is free end, and described the
One foot bearing (4) and crus secunda bearing (5) are all cylindrical member, and the first foot bearing (4) is fan-shaped first by section
High coefficient of friction material (41) and section are combined for fan-shaped the first low friction coefficient materials (42), the crus secunda bearing
(5) it is that fan-shaped the second high coefficient of friction material (52) is multiple by the second low friction coefficient materials (51) and section that section is sector
It closes, the free end of first support leg (2) is connected with the first foot bearing (4), the free end of second support leg (3)
It is connected with crus secunda bearing (5).
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| CN201810029488.9A CN108063563A (en) | 2018-01-12 | 2018-01-12 | A kind of two-way piezoelectric actuator |
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| CN201810029488.9A CN108063563A (en) | 2018-01-12 | 2018-01-12 | A kind of two-way piezoelectric actuator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756147A (en) * | 2018-12-13 | 2019-05-14 | 西安交通大学 | A kind of looper biomimetic features and manufacturing process based on liquid crystal elastomeric polymer |
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| CN109756147A (en) * | 2018-12-13 | 2019-05-14 | 西安交通大学 | A kind of looper biomimetic features and manufacturing process based on liquid crystal elastomeric polymer |
| CN109756147B (en) * | 2018-12-13 | 2020-03-31 | 西安交通大学 | Electric actuating inchworm bionic structure based on liquid crystal elastic polymer and manufacturing process |
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