CN110504863B - Actuator with three-stage micro-displacement amplification mechanism with framework providing axial magnetic field - Google Patents
Actuator with three-stage micro-displacement amplification mechanism with framework providing axial magnetic field Download PDFInfo
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- CN110504863B CN110504863B CN201910715676.1A CN201910715676A CN110504863B CN 110504863 B CN110504863 B CN 110504863B CN 201910715676 A CN201910715676 A CN 201910715676A CN 110504863 B CN110504863 B CN 110504863B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 76
- 230000007246 mechanism Effects 0.000 title claims abstract description 58
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 54
- 230000003321 amplification Effects 0.000 title claims description 187
- 238000003199 nucleic acid amplification method Methods 0.000 title claims description 187
- 239000004020 conductor Substances 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 3
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- 230000005284 excitation Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
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- 230000005489 elastic deformation Effects 0.000 description 2
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- 238000010276 construction Methods 0.000 description 1
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- 229910052761 rare earth metal Inorganic materials 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
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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
- H02N2/04—Constructional details
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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
- H02N2/04—Constructional details
- H02N2/043—Mechanical transmission means, e.g. for stroke amplification
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Abstract
The invention discloses an actuator with a three-stage micro-displacement amplifying mechanism for providing an axial magnetic field by a framework, which comprises: h-shaped non-magnetic shell, upper end cover, lower end cover, solenoid, assembly, three-stage micro-displacement amplifying mechanism and output rod. The invention can amplify the displacement of the original driver, effectively increases the output displacement of the driver, reduces the volume of the driver on the premise of the same output condition and miniaturizes the driver.
Description
Technical Field
The invention relates to the field of precision control, in particular to a novel actuator with a three-stage micro-displacement amplification mechanism, wherein a framework provides an axial magnetic field.
Background
In recent years, various drivers with high resolution and high response speed are widely applied to various fields including microelectronics, nanotechnology, biomedical engineering, precision machining and the like. And with the continuous development of the technology, higher requirements are put forward on various indexes of the driver. The giant magnetostrictive material has a series of excellent characteristics of large strain value, high response speed, high energy density, large electromechanical coupling coefficient, high reliability and the like, and shows good application prospect in the field of drivers.
For some environments requiring a lower output range, such as below 100um, or having no limitation on the volume of the actuator, the magnetostrictive actuator can perform work independently without the aid of auxiliary equipment, but for some areas requiring a larger output and/or environments having a limitation on the volume of the actuator, it is not sufficient to rely solely on the magnetostrictive actuator to perform work. A means of amplifying the displacement of the driver output is needed.
The flexible hinge as a mechanical transmission and support mechanism has the advantages of no friction, no clearance, high motion resolution and the like, and is widely applied to the field of micro-displacement amplification mechanisms. The working principle of the flexible displacement amplifying mechanism is that the flexible displacement amplifying mechanism moves by means of elastic deformation of the flexible hinge, and in order to avoid errors caused by parasitic movement and temperature load, the structure of the mechanism is mostly designed in an axial symmetry mode. However, there are problems with this design: under the condition that the volume of the amplification mechanism is not changed, in order to ensure a symmetrical structure, the effective transverse structure of the amplification factor is only half, and under the condition that the amplification factor is ensured, the whole transverse structure is doubled. In addition, because the amplification mechanism is bulky, the driver is typically placed inside the amplification mechanism. Therefore, under the working condition of considering both small volume and large amplification factor, the application of the flexible displacement amplification mechanism is limited.
Chinese patent CN100466319C discloses a magnetostrictive actuator, which comprises a magnetostrictive element, a driving rod, an electromagnetic coil, and a housing, wherein the housing is composed of a tubular permanent magnet and a ferromagnetic body, and applies a static bias magnetic field to the magnetostrictive element. The magnetostrictive element is extended and shortened by superposing a magnetic field generated by the electromagnetic coil and a static bias magnetic field. The strain of the magnetostrictive material is utilized to output outwards, and the output displacement is small; the permanent magnet is arranged in the shell to generate a magnetic field outwards, and when ferromagnetic substances are arranged near the actuator, the internal bias magnetic field is easily influenced, so that the output of the actuator is influenced.
Chinese patent CN101166005B discloses a giant magnetostrictive micro displacement mechanism using a lever amplification mechanism. The device comprises a cylinder body, a lever structure, a transmission disc, a lower limit ring, an excitation coil, a magnetostrictive rod, an upper limit disc, an output rod, a base and a return spring, wherein an amplifying mechanism is arranged between the magnetostrictive rod and the output rod, and the device comprises a lever structure and the transmission disc. Utilize one to tertiary lever to enlarge the output displacement of magnetostrictive rod body, its radial volume is great, and because the mechanism spare part of enlargeing is more, and the assembly complexity is higher in little volume driver, realizes comparatively difficultly, causes its output accuracy and reliability to descend simultaneously.
Chinese patent CN2376137Y discloses a magnetostrictive actuator using an elastic beam to amplify displacement, which uses a giant magnetostrictive rod to drive, and the excitation coil generates a magnetic field after being energized, so that the giant magnetostrictive material extends, and transmits the output displacement and force to the input end of the fixed elastic beam to cause elastic deformation, and the displacement is amplified by the output end. The elastic beam amplifying mechanism utilizes a lever amplifying principle, and the maximum amplification factor is 5.1 times. The cantilever beam amplification mechanism has small amplification factor, large radial volume and large loss to output force.
With the continuous miniaturization of various precision devices, the requirement for the driver is also increased, and although the volume of the driver can be miniaturized by the existing mode of placing the amplifying mechanism inside the driver, the volume of the amplifying mechanism still restricts the use of the driver, and how to obtain large output displacement while keeping the volume of the driver miniaturized is still a problem to be solved.
Disclosure of Invention
The invention solves the technical problem of providing an actuator with a three-stage micro-displacement amplification mechanism, wherein an axial magnetic field is provided by a framework, the actuator can amplify the displacement of an original driver, effectively increases the output displacement of the driver, reduces the volume of the driver on the premise of the same output condition and miniaturizes the driver.
The technical scheme is as follows:
an actuator with a three-stage micro-displacement amplification mechanism for providing an axial magnetic field by a framework, comprising: the device comprises an H-shaped non-magnetic shell, an upper end cover, a lower end cover, a solenoid, a combination, a three-stage micro-displacement amplification mechanism and an output rod; the two ends of the H-shaped non-magnetic shell are opened, the inner wall of the H-shaped non-magnetic shell is provided with a baffle, and the baffle is provided with an input rod through hole; the upper end cover is connected with the front end opening, the upper end cover is provided with an output rod through hole, and the lower end cover is connected with the rear end opening; the solenoid is arranged in the H-shaped non-magnetic conductive shell and positioned at the rear part of the baffle, the front end of the solenoid is propped against the baffle, and the rear end of the solenoid is propped against the lower end cover; the solenoid is provided with an axial through hole, the solenoid is provided with a coil, and the outer wall of the axial through hole is provided with a permanent magnet; the axial through hole is communicated with the input rod through hole, and the assembly is arranged in the axial through hole; the three-stage micro-displacement amplifying mechanism is arranged in the H-shaped non-magnetic-conductive shell and is positioned at the front part of the baffle plate, and a displacement input rod of the three-stage micro-displacement amplifying mechanism extends into the through hole of the input rod and is connected with the end part of the assembly; one end of the output rod is connected with the output end of the three-stage micro-displacement amplifying mechanism, and the other end of the output rod extends out of the output rod through hole.
Further, the three-stage micro-displacement amplifying mechanism comprises: the three-stage asymmetric amplification structure comprises three asymmetric amplification units, namely a first-stage amplification unit, a second-stage amplification unit and a third-stage amplification unit; the asymmetric amplification unit includes: the amplifying output rod, the amplifying fixed rod, the input end hinge and the amplifying fixed end hinge are arranged on the output end of the amplifying output rod; the amplifying output rod is transversely arranged, the amplifying fixed rod is connected to the lower part of the amplifying output rod through an amplifying fixed end hinge, and the amplifying fixed end hinge is positioned at the position, close to the end part, of the amplifying output rod; the input end hinge is arranged at the lower part of the amplification output rod and is positioned at the inner side of the hinge of the amplification fixed end; the input end of the first-stage amplification unit is hinged with the input end, and the second-stage amplification unit is hinged with the top of the amplification output rod of the first-stage amplification unit through the input end; the third-stage amplification unit is connected with the top of an amplification output rod of the second-stage amplification unit through an input end hinge, the top of the third-stage amplification unit is connected with an output end through an amplification output hinge, and the output end is transversely arranged; the input end hinge, the amplification fixed end hinge and the amplification output hinge adopt flexible hinges; the two asymmetric second-stage amplification units are arranged in an opposite and overlapped mode, the two contacted input ends are connected, the two contacted amplification fixing rods are connected, and the two contacted output ends are connected.
Further, the bottom of input end is provided with the input pole.
Further, the asymmetric amplifying unit adopts a non-axial symmetric structure.
Further, the amplification factor is adjusted by adjusting the position of the input end hinge of the first-stage amplification unit, the second-stage amplification unit or the third-stage amplification unit on the amplification output rod.
Further, the solenoid includes: a support end face, a solenoid body, and a coil; the supporting end faces are arranged at two ends of the solenoid body, and the coil is arranged on the outer wall of the solenoid body; the solenoid body includes: the magnetic conductor and the permanent magnet are in annular structures, and the magnetic conductors and the permanent magnets are alternately arranged at intervals and are connected at the contacted end faces.
Further, the axial through hole is provided with a heat insulation layer, and the solenoid body is of a tubular structure.
Furthermore, the structure of the solenoid body takes the axial center as a midpoint and is in a two-side symmetrical structure; the permanent magnets are at least 2 groups, and the magnetic properties of the permanent magnets symmetrical on two sides of the central point are the same; the magnetic performance of the permanent magnets distributed from the middle point to the two ends is gradually reduced.
Furthermore, the magnetizer is at least 3 groups, and the length of the magnetizer distributed from the axial center point to the two ends is gradually increased.
Furthermore, the supporting end face is connected with the magnetizer, and the heat insulation layer is made of a non-magnetic material.
The invention has the technical effects that:
the invention can be applied to the fields of microelectronics, nanotechnology, biomedical engineering, precision machining and the like.
1. Because the third-stage amplification unit based on the flexible hinge is adopted, the displacement of the original driver is amplified, the output displacement of the driver is effectively increased, the size of the driver is reduced on the premise of the same output condition, and the driver is miniaturized.
2. Because the amplifying mechanism is arranged in the rare earth super magnetostrictive actuator, no extra space is occupied, and the application environment of the actuator is expanded while large output displacement of the actuator is kept.
3. Because the method of combining the permanent magnet with the magnetizer to replace the original solenoid framework is adopted, the driver does not need to design a bias magnetic field, the space of the device is effectively saved, and the device is miniaturized.
Drawings
FIG. 1 is a schematic diagram of an actuator with a two-stage micro-displacement amplification mechanism for providing an axial magnetic field to a framework according to the present invention;
FIG. 2 is a schematic structural diagram of an asymmetric amplifying unit according to the present invention;
FIG. 3 is a schematic diagram of an asymmetric three-stage amplification structure according to the present invention;
FIG. 4 is a schematic structural diagram of a three-stage micro-displacement amplifying mechanism according to the present invention;
FIG. 5 is a schematic diagram of the construction of a solenoid according to the present invention;
FIG. 6 is a schematic structural view of a solenoid in embodiment 1 of the invention;
FIG. 7 is a schematic structural view of a solenoid in embodiment 2 of the invention;
fig. 8 is a diagram showing a state of use of a solenoid in embodiment 2 of the present invention.
Detailed Description
The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
Fig. 1 is a schematic structural diagram of an actuator with a three-stage micro-displacement amplification mechanism for providing an axial magnetic field to a framework according to the present invention.
An actuator with a three-stage micro-displacement amplification mechanism, wherein the framework provides an axial magnetic field, and the actuator comprises: h-shaped non-magnetic conductive shell 1, upper end cap 2, lower end cap 3, solenoid 4, assembly 5, three-stage micro-displacement amplifying mechanism 6 and output rod 7.
The two ends of the H-shaped non-magnetic shell 1 are open, the inner wall is provided with a baffle 11, and the baffle 11 is provided with an input rod through hole. The upper end cover 2 is connected with the front end opening, the upper end cover 2 is provided with an output rod through hole, and the lower end cover 3 is connected with the rear end opening; the solenoid 4 is arranged in the H-shaped non-magnetic conductive shell 1 and is positioned at the rear part of the baffle 11, the front end of the solenoid supports against the baffle 11, and the rear end of the solenoid supports against the lower end cover 3; the solenoid 4 is provided with an axial through hole, the solenoid 4 is wound with a coil 43, the outer wall of the axial through hole is provided with a permanent magnet, and the permanent magnet forms an axial permanent magnet magnetic field at the axial through hole; the axial through hole is communicated with the input rod through hole, and the assembly 5 is arranged in the axial through hole; the three-stage micro-displacement amplifying mechanism 6 is arranged in the H-shaped non-magnetic conductive shell 1 and is positioned at the front part of the baffle 11, and a displacement input rod of the three-stage micro-displacement amplifying mechanism 6 extends into a through hole of the input rod and is connected with the end part of the assembly 5; one end of the output rod 7 is connected with the output end 63 of the three-stage micro-displacement amplifying mechanism 6, and the other end extends out of the output rod through hole.
The assembly 5 is a magnetostrictive rod, transmits telescopic displacement to the input rod 65 of the three-stage micro-displacement amplifying mechanism 6, the fixed end of the third-stage amplifying unit 6 is connected to the baffle 11, the three-stage micro-displacement amplifying mechanism 6 amplifies the displacement and then transmits the amplified displacement to the output rod 7, and the output rod 7 outputs the displacement.
As shown in fig. 2, it is a schematic structural diagram of the asymmetric amplifying unit 61 in the present invention.
The asymmetric amplification unit 61 includes: an amplification output rod 611, an amplification fixing rod 612, an input end hinge 613, and an amplification fixing end hinge 614; the amplification output rod 611 is transversely arranged, the amplification fixing rod 12 is connected to the lower part of the amplification output rod 11 through an amplification fixing end hinge 614, and the amplification fixing end hinge 14 is positioned at the position close to the end part of the amplification output rod 611; the input end hinge 613 is disposed at the lower portion of the enlarged output rod 611 and is located inside the enlarged fixed end hinge 614. Flexible hinges are adopted as the input end hinge 613 and the enlarged fixed end hinge 614.
Using the principle of leverage, the amplification fixing end hinge 614 pulls the end of the amplification output rod 611, and the input end hinge 613 supports the amplification factor, and the amplification factor can be changed by adjusting the position of the input end hinge 613 on the amplification output rod 611.
The asymmetric amplifying unit 61 adopts a non-axial symmetric structure, so that the space occupied by the part which is ineffective for the amplifying effect in the traditional axial symmetric mode is effectively avoided, and the volume of the amplifying mechanism is reduced.
Fig. 3 is a schematic structural diagram of an asymmetric three-stage amplification structure according to the present invention.
The asymmetric three-level amplifying structure comprises: three asymmetric amplification units 61 connected in series, wherein the three asymmetric amplification units 61 are respectively a first-stage amplification unit, a second-stage amplification unit and a third-stage amplification unit; the input end hinge 613 of the first-stage amplification unit is connected with the input end 62, and the input end 62 is connected with the input rod 65; the second stage amplification unit is connected to the top of the amplification output rod 611 of the first stage amplification unit by an input end hinge 613; the third-stage amplification unit is connected with the top of an amplification output rod 611 of the second-stage amplification unit through an input end hinge 613, and an amplification fixing rod 612 of the third-stage amplification unit is connected with an amplification fixing rod 612 of the first-stage amplification unit; the amplifying fixing rods 612 of the three asymmetric amplifying units 61 are positioned at two sides of the input end 62; the top of the third stage amplifying unit is connected with an output end 63 through an amplifying output hinge 64, and the output end 63 is transversely arranged. The amplified output hinge 64 is a flexible hinge.
The amplification factor can be adjusted by adjusting the position of the input end hinge 613 of the first stage amplification unit on the amplification output bar 611, and further, the amplification factor can be changed by adjusting the connection position of the input end hinge 613 of the second stage amplification unit and the third stage amplification unit with the amplification output bar 611.
Fig. 4 is a schematic structural view of the three-stage micro-displacement amplification mechanism according to the present invention.
The three-level micro-displacement amplifying mechanism comprises: the two asymmetric three-stage amplification structures are arranged oppositely and overlapped, after the two asymmetric three-stage amplification structures are overlapped, two contacted input ends 62 are connected, two contacted input rods 65 are connected, two contacted amplification fixing rods 612 are connected, and two contacted output ends 63 are connected. Other non-connecting parts of the three-stage micro-displacement amplifying mechanism can move freely. The input rod 65 can facilitate the introduction of micro-displacements.
The two asymmetric three-stage amplification structures are opposite in position, namely one asymmetric three-stage amplification structure is turned 180 degrees horizontally to form the other asymmetric second-stage amplification unit.
The amplification method of the three-level micro-displacement amplification mechanism comprises the following specific steps:
the micro displacement input by the assembly 5 is transmitted to the input end 62 through the input rod 65, the input end 62 transmits the displacement to the input end hinge 613 of the first-stage amplification unit, and the input end hinge 613 transmits the displacement to the amplification output rod 611 of the first-stage amplification unit; the amplification output rods 611 of the two first-stage amplification units deflect simultaneously, and the ends move upwards;
the amplified output rod 611 of the first-stage amplification unit transmits the amplified displacement to the input end hinges 613 of the two second-stage amplification units, the input end hinges 613 of the second-stage amplification units transmit the displacement to the amplified output rod 611 of the second-stage amplification unit, and the amplified output rod 611 of the second-stage amplification unit deflects and the end part moves upwards;
the amplified output rod 611 of the second-stage amplification unit transmits the amplified displacement to the input end hinges 613 of the two third-stage amplification units, the input end hinges 613 of the third-stage amplification units transmit the displacement to the amplified output rod 611 of the third-stage amplification unit, and the amplified output rod 611 of the third-stage amplification unit deflects and the end part moves upwards;
the amplified output rods 611 of the two third-stage amplification units transmit the amplified displacement to the amplified output hinge 64, and the amplified output hinge 64 drives the output end 63 of the third-stage amplification unit to move upwards, so that the amplified output of the micro displacement of the magnetostrictive actuator is realized.
The amplification fixing rod 612 is fixed, the amplification fixing end hinge 614 plays a role in pulling the end part of the amplification output rod 611 of the first-stage amplification unit, the input end jacks the amplification output rod 611 of the first-stage amplification unit through the input end hinge, and the amplification output rod 611 of the first-stage amplification unit deflects; the amplification fixing rod 612 of the second-stage amplification unit is fixed, and the amplification fixing rod 612 of the second-stage amplification unit plays a role of pulling the end of the amplification output rod 611 of the second-stage amplification unit through the amplification fixing end hinge 614; the amplification output rod 611 of the first stage amplification unit is jacked up by the amplification output hinge 613 to the amplification output rod 611 of the second stage amplification unit, the amplification output rod 611 of the second stage amplification unit deflects, and the end moves upward; the amplification fixing lever 612 of the third stage amplification unit acts to pull the end of the amplification output lever 611 of the third stage amplification unit by the amplification fixing end hinge 614, the amplification output lever 611 of the second stage amplification unit pushes up the amplification output lever 11 of the third stage amplification unit by the amplification output hinge 613, and the amplification output lever 611 of the third stage amplification unit deflects and the end moves upward.
The magnification is changed by adjusting the connection positions of the input end hinge 613 of the first-stage amplification unit, the input end hinge 613 of the second-stage amplification unit, and the input end hinge 613 of the third-stage amplification unit to the amplification output rod 611.
Fig. 5 is a schematic view showing the structure of the solenoid 4 according to the present invention.
The solenoid 4 provides an axial permanent magnetic field which can be used as an excitation magnetic field and a bias magnetic field of devices such as a magnetostrictive brake, a driver and the like.
The structure of the solenoid 4 includes: support end face 41, solenoid body 42, coil 43; the support end surfaces 41 are provided at both ends of the solenoid body 42, and the coil 43 is provided on the outer wall of the solenoid body 42. The solenoid body 42 is a tubular structure, and a heat insulating layer 44 is provided on an inner wall of the solenoid body 42 in order to enhance the heat insulating effect.
The solenoid body 42 includes: magnetizer 421 and permanent magnet 422, magnetizer 421 and permanent magnet 422 are ring structure, and a plurality of magnetizers 421 and permanent magnets 422 are alternately arranged at intervals and connected at the contacted end surface. The plurality of magnetizers 421 and the permanent magnets 422 are coaxially distributed, and have the same inner diameter.
The solenoid body 42 has a bilaterally symmetrical structure with the axial center as a midpoint. The coil 43 is formed by winding an enameled wire. The permanent magnets 422 are at least 2 groups, and the permanent magnets 422 with symmetrical sides at the center point have the same magnetic property; the magnetic properties of the permanent magnets 422 distributed from the midpoint to the ends are gradually reduced. The magnetizers 421 are more than 3 groups, and the length of the magnetizers increases gradually from the axial center point to the two ends. The supporting end face 41 is connected with the magnetizer 421. The thermal insulation layer 44 is made of non-magnetic material.
Fig. 6 is a schematic structural view of the solenoid 4 according to embodiment 1 of the present invention.
The solenoid body 42 includes two magnetic conductors 421 and three permanent magnets 422.
Fig. 7 is a schematic structural view of a solenoid 4 according to embodiment 2 of the present invention; fig. 8 is a diagram showing a state of use of the solenoid 4 in embodiment 2 of the present invention.
The solenoid body 42 includes eight magnetic conductors 421 and seven permanent magnets 422.
The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (9)
1. An actuator with a three-stage micro-displacement amplification mechanism for providing an axial magnetic field by a framework, comprising: the device comprises an H-shaped non-magnetic shell, an upper end cover, a lower end cover, a solenoid, a combination, a three-stage micro-displacement amplification mechanism and an output rod; the two ends of the H-shaped non-magnetic conductive shell are provided with openings, the inner wall of the H-shaped non-magnetic conductive shell is provided with a baffle, and the baffle is provided with an input rod through hole; the upper end cover is connected with the front end opening, the upper end cover is provided with an output rod through hole, and the lower end cover is connected with the rear end opening; the solenoid is arranged in the H-shaped non-magnetic conductive shell and positioned at the rear part of the baffle, the front end of the solenoid is propped against the baffle, and the rear end of the solenoid is propped against the lower end cover; the solenoid is provided with an axial through hole, the solenoid is provided with a coil, and the outer wall of the axial through hole is provided with a permanent magnet; the axial through hole is communicated with the input rod through hole, and the assembly is arranged in the axial through hole; the three-stage micro-displacement amplifying mechanism is arranged in the H-shaped non-magnetic-conductive shell and is positioned at the front part of the baffle plate, and a displacement input rod of the three-stage micro-displacement amplifying mechanism extends into the through hole of the input rod and is connected with the end part of the assembly; one end of the output rod is connected with the output end of the three-stage micro-displacement amplifying mechanism, and the other end of the output rod extends out of the output rod through hole; the tertiary micrometric displacement mechanism of amplifying includes: the three-stage asymmetric amplification structure comprises three asymmetric amplification units which are connected in series, wherein the three asymmetric amplification units are a first-stage amplification unit, a second-stage amplification unit and a third-stage amplification unit respectively; the asymmetric amplification unit includes: the amplifying output rod, the amplifying fixed rod, the input end hinge and the amplifying fixed end hinge; the amplifying output rod is transversely arranged, the amplifying fixed rod is connected to the lower part of the amplifying output rod through an amplifying fixed end hinge, and the amplifying fixed end hinge is positioned at the position, close to the end part, of the amplifying output rod; the input end hinge is arranged at the lower part of the amplification output rod and is positioned at the inner side of the hinge of the amplification fixed end; the input end of the first-stage amplification unit is hinged with the input end, and the second-stage amplification unit is hinged with the top of the amplification output rod of the first-stage amplification unit through the input end; the third-stage amplification unit is connected with the top of an amplification output rod of the second-stage amplification unit through an input end hinge, the top of the third-stage amplification unit is connected with an output end through an amplification output hinge, and the output end is transversely arranged; the input end hinge, the amplification fixed end hinge and the amplification output hinge adopt flexible hinges; the two asymmetric second-stage amplification units are arranged in an opposite and overlapped mode, the two contacted input ends are connected, the two contacted amplification fixing rods are connected, and the two contacted output ends are connected.
2. The actuator with three-stage micro-displacement amplification mechanism for providing an axial magnetic field by a framework as claimed in claim 1, wherein the input rod is arranged at the bottom of the input end.
3. The actuator with three-stage micro-displacement amplifying mechanism for providing axial magnetic field with skeleton of claim 1, wherein the asymmetric amplifying unit is non-axially symmetric.
4. The actuator with three-stage micro-displacement amplification mechanism for providing an axial magnetic field by a framework as claimed in claim 1, wherein the amplification factor is adjusted by adjusting the position of the input end hinge of the first stage amplification unit, the second stage amplification unit or the third stage amplification unit on the amplification output rod.
5. The actuator with three-stage micro-displacement amplification mechanism for providing an axial magnetic field by a framework of claim 1, wherein the solenoid comprises: a support end face, a solenoid body, and a coil; the supporting end faces are arranged at two ends of the solenoid body, and the coil is arranged on the outer wall of the solenoid body; the solenoid body includes: the magnetic conductor and the permanent magnet are in annular structures, and the magnetic conductors and the permanent magnets are alternately arranged at intervals and are connected at the contacted end faces.
6. The actuator with three-stage micro-displacement amplification mechanism for providing an axial magnetic field with a frame as claimed in claim 5, wherein the axial through hole is provided with a heat insulating layer, and the solenoid body is of a tubular structure.
7. The actuator with three-stage micro-displacement amplification mechanism for providing an axial magnetic field by using the framework as claimed in claim 5, wherein the structure of the solenoid body takes the axial center as a midpoint and is in a bilaterally symmetrical structure; the permanent magnets are at least 2 groups, and the magnetic properties of the permanent magnets symmetrical on two sides of the central point are the same; the magnetic performance of the permanent magnets distributed from the middle point to the two ends is gradually reduced.
8. The actuator with three-stage micro-displacement amplifier for providing axial magnetic field according to claim 7, wherein the number of the magnetizers is at least 3, and the length of the magnetizer distributed from the axial center point to both ends is gradually increased.
9. The actuator with three-stage micro-displacement amplification mechanism for providing an axial magnetic field according to claim 6, wherein the supporting end face is connected with the magnetizer, and the heat insulating layer is made of a non-magnetic material.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| PCT/CN2020/076120 WO2021022803A1 (en) | 2019-08-05 | 2020-02-21 | Micro-displacement amplification mechanism, and amplification method for same |
| JP2021505987A JP7090234B2 (en) | 2019-08-05 | 2020-02-21 | Micro-displacement expansion mechanism and its expansion method |
| US17/159,429 US11616456B2 (en) | 2019-08-05 | 2021-01-27 | Micro-displacement amplifying apparatus and amplification method thereof |
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| CN101145742B (en) * | 2007-10-19 | 2010-08-25 | 北京工业大学 | A dual-phase set ultra-magnetism flexible driver and its implementation method |
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