CN112087161A - High-frequency reciprocating mechanism - Google Patents
High-frequency reciprocating mechanism Download PDFInfo
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- CN112087161A CN112087161A CN202010766531.7A CN202010766531A CN112087161A CN 112087161 A CN112087161 A CN 112087161A CN 202010766531 A CN202010766531 A CN 202010766531A CN 112087161 A CN112087161 A CN 112087161A
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- piezoelectric stack
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- 230000033001 locomotion Effects 0.000 claims abstract description 20
- 230000003321 amplification Effects 0.000 abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009347 mechanical transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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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
- H02N2/02—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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- 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
- H02N2/065—Large signal circuits, e.g. final stages
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to the technical field of high-frequency precise driving devices, in particular to a high-frequency reciprocating mechanism; the piezoelectric stack type piezoelectric actuator comprises a rack, wherein a piezoelectric stack, a lever mechanism and a reset device are arranged on the rack, and the lever mechanism and the rack form rotatable connection; two ends of the lever mechanism are respectively connected with the piezoelectric stack and the reset device in a matching way; the invention has reasonable structure, adopts the piezoelectric stack as a power source to realize high-frequency reciprocating motion, has real-time variable motion distance of the reciprocating motion, adopts the secondary lever to amplify the motion stroke, miniaturizes the whole structure, improves the amplification factor and realizes millimeter-grade precise reciprocating motion; and the moving end adopts a gas spring to replace a common spring to avoid the force delay phenomenon during high-frequency movement.
Description
Technical Field
The invention relates to the technical field of high-frequency precise driving devices, in particular to a high-frequency reciprocating mechanism.
Background
The reciprocating motion is a common mechanical transmission type, and the traditional driving mechanism has difficulty in realizing the reciprocating motion with high frequency (more than 50Hz) and controllable stroke distance in real time. Common lead screw and motor combination, linear electric motor etc. can realize reciprocating distance real-time controllable, but reciprocating frequency improves and receives motor rotational speed, drive ratio and stroke length restriction, hardly realizes reciprocating frequency's promotion. The combination of the cam, the crank and the connecting rod can realize high-frequency reciprocating, but the reciprocating stroke length is fixed, and the requirement of real-time conversion of reciprocating distance cannot be realized. However, in part of current working scenes, high-frequency and high-precision reciprocating driving is needed, and the existing mechanical transmission mechanism cannot meet the use requirement. Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention aims to provide a high-frequency reciprocating mechanism with a reasonable structure aiming at the defects and shortcomings of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-frequency reciprocating mechanism comprises a rack, wherein a piezoelectric stack, a lever mechanism and a reset device are arranged on the rack, and the lever mechanism and the rack are in rotatable connection; and two ends of the lever mechanism are respectively connected with the piezoelectric stack and the reset device in a matching way.
According to the scheme, one end of the piezoelectric stack is fixedly connected with the rack, and the other end of the piezoelectric stack is connected with the input end of the lever mechanism in a matched mode.
According to the scheme, the reset device comprises a gas spring, a linear guide rail is arranged on the rack, and the gas spring is movably arranged on the linear guide rail; the output end of the lever mechanism is connected with the gas spring in a matching way.
According to the scheme, the lever mechanism comprises a first lever and a second lever, and the first lever and the second lever are respectively and rotatably connected with the rack; the input end of the first lever is connected with the piezoelectric stack in a matched mode, the output end of the first lever is connected with the input end of the second lever in a matched mode, and the output end of the second lever is connected with the gas spring in a matched mode.
According to the scheme, the lever mechanism further comprises a pre-tightening spring, a sleeve base is fixedly arranged on the rack, one end of the pre-tightening spring penetrates through the sleeve base, and the other end of the pre-tightening spring is connected with the output end of the first lever in a matched mode.
The invention has the beneficial effects that: the invention has reasonable structure, adopts the piezoelectric stack as a power source to realize high-frequency reciprocating motion, and the motion distance of the reciprocating motion is variable in real time; the motion stroke is amplified by adopting a secondary lever, so that the whole structure is miniaturized, the amplification factor is improved, and millimeter-grade precise reciprocating motion is realized; the gas spring replaces a common spring to avoid the force delay phenomenon during high-frequency motion.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the distance traveled by the present invention at different voltages;
fig. 3 is a schematic diagram of the stroke variation of the present invention under the same voltage.
In the figure:
1. a frame; 2. a piezoelectric stack; 3. a gas spring; 11. a linear guide rail; 12. a sleeve base; 13. pre-tightening the spring; 21. a first lever; 22. a second lever.
Detailed Description
The technical solution of the present invention is described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the high-frequency reciprocating mechanism of the present invention comprises a frame 1, wherein the frame 1 is provided with a piezoelectric stack 2, a lever mechanism and a reset device, and the lever mechanism and the frame 1 form a rotatable connection; and two ends of the lever mechanism are respectively connected with the piezoelectric stack 2 and the reset device in a matching way. The invention adopts the piezoelectric stack 2 as a power source, and then utilizes the lever mechanism to amplify the nano-scale movement distance of the piezoelectric stack 2 to millimeter level, thereby simultaneously realizing the purposes of high-frequency reciprocating motion and adjustable reciprocating distance.
One end of the piezoelectric stack 2 is fixedly connected with the frame 1, and the other end of the piezoelectric stack 2 is connected with the input end of the lever mechanism in a matching manner. Different voltages are applied to the piezoelectric stack 2, different reciprocating distances can be obtained, so that the stroke of the piezoelectric stack 2 is amplified through a lever mechanism, and test data can prove that the voltage of the piezoelectric stack 2 has good correlation with the movement distance.
The reset device comprises an air spring 3, a linear guide rail 11 is arranged on the rack 1, and the air spring 3 is movably arranged on the linear guide rail 11; the output end of the lever mechanism is connected with the gas spring 3 in a matching way. The gas spring 3 can solve the delay phenomenon of spring force when the compression amount fluctuates, and then the gas spring is adopted as an integral reset power source on the output end of the lever mechanism, so that the reciprocating frequency of the whole system reaches 200 Hz.
The lever mechanism comprises a first lever 21 and a second lever 22, and the first lever 21 and the second lever 22 are respectively connected with the rack 1 in a rotating manner; the input end of the first lever 21 is connected with the piezoelectric stack 2 in a matching way, the output end of the first lever 21 is connected with the input end of the second lever 22 in a matching way, and the output end of the second lever 22 is connected with the gas spring 3 in a matching way. The invention preferably adopts a two-stage lever amplification structure, namely the stroke of the piezoelectric stack 2 is amplified to a millimeter level through the transmission of the first lever 21 and the second lever 22, thereby simultaneously realizing the purpose of high-frequency reciprocating motion.
The lever mechanism further comprises a pre-tightening spring 13, a sleeve base 12 is fixedly arranged on the rack 1, one end of the pre-tightening spring 13 penetrates through the sleeve base 12, and the other end of the pre-tightening spring 13 is connected with the output end of the first lever 21 in a matched mode. The pre-tightening spring 13 is used for applying pre-tightening force to the lever mechanism to ensure the stability of the whole mechanism, when the piezoelectric stack 2 is electrified, stroke change is generated, the stroke action overcomes the resistance of the pre-tightening spring 13 after being amplified by the first lever 21, and then the stroke action is transmitted to the moving end through the second lever 22.
As shown in fig. 2, by changing the voltage of the piezo stack 2, the reciprocating distance of the system at different voltages is obtained (different lever amplification factors and the amount of extension and retraction of the piezo stack 2 itself, the obtained actual distance is different), and the voltage and the movement distance of the piezo stack 2 have good correlation from data.
As shown in FIG. 3, at the same voltage, 32 sets of test distances are adopted to obtain the variation range of the running distance, and the maximum variation is 4 microns from the data, and the precision is satisfactory to the application of the conventional automatic production.
The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.
Claims (5)
1. A high-frequency reciprocating motion mechanism comprises a machine frame (1), and is characterized in that: the piezoelectric stack (2), the lever mechanism and the reset device are arranged on the rack (1), and the lever mechanism and the rack (1) are in rotatable connection; and two ends of the lever mechanism are respectively connected with the piezoelectric stack (2) and the reset device in a matching way.
2. The high-frequency reciprocating mechanism according to claim 1, characterized in that: one end of the piezoelectric stack (2) is fixedly connected with the rack (1), and the other end of the piezoelectric stack (2) is connected with the input end of the lever mechanism in a matching manner.
3. The high-frequency reciprocating mechanism according to claim 1, characterized in that: the reset device comprises an air spring (3), a linear guide rail (11) is arranged on the rack (1), and the air spring (3) is movably arranged on the linear guide rail (11); the output end of the lever mechanism is connected with the gas spring (3) in a matching way.
4. The high-frequency reciprocating mechanism according to any one of claims 1 to 3, characterized in that: the lever mechanism comprises a first lever (21) and a second lever (22), and the first lever (21) and the second lever (22) are respectively in rotating connection with the rack (1); the input end of the first lever (21) is connected with the piezoelectric stack (2) in a matched mode, the output end of the first lever (21) is connected with the input end of the second lever (22) in a matched mode, and the output end of the second lever (22) is connected with the gas spring (3) in a matched mode.
5. The high-frequency reciprocating mechanism according to claim 4, wherein: the lever mechanism further comprises a pre-tightening spring (13), a sleeve base (12) is fixedly arranged on the rack (1), one end of the pre-tightening spring (13) penetrates through the sleeve base (12), and the other end of the pre-tightening spring (13) is connected with the output end of the first lever (21) in a matched mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010766531.7A CN112087161A (en) | 2020-08-03 | 2020-08-03 | High-frequency reciprocating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010766531.7A CN112087161A (en) | 2020-08-03 | 2020-08-03 | High-frequency reciprocating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112087161A true CN112087161A (en) | 2020-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010766531.7A Pending CN112087161A (en) | 2020-08-03 | 2020-08-03 | High-frequency reciprocating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112087161A (en) |
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2020
- 2020-08-03 CN CN202010766531.7A patent/CN112087161A/en active Pending
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