CN111162691B - Rotary motion driving device - Google Patents
Rotary motion driving device Download PDFInfo
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- CN111162691B CN111162691B CN202010049896.8A CN202010049896A CN111162691B CN 111162691 B CN111162691 B CN 111162691B CN 202010049896 A CN202010049896 A CN 202010049896A CN 111162691 B CN111162691 B CN 111162691B
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- 238000000034 method Methods 0.000 claims abstract description 17
- 230000005284 excitation Effects 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 6
- 241000256247 Spodoptera exigua Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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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
- H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary 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
- H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
- H02N2/12—Constructional details
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The application belongs to the field of precise driving, and particularly relates to a rotary motion driving device. The application solves the technical problem that the output efficiency of the inertial piezoelectric driver is reduced due to the rollback phenomenon. The device comprises a driving unit, a spring mechanism, a rotor, a screw and a base; the driving unit is contacted with the rotor and is arranged on the base through a screw; one end of the spring mechanism is contacted with the rotor, and the other end of the spring mechanism is arranged on the base; under the excitation of voltage signals, the device driving unit can drive the rotor to rotate, the spring mechanism is contacted with the rotor in the movement process and generates friction force, the rollback of the rotor in the movement process can be eliminated, and the efficient rotation movement is realized. The device can be applied to the fields of precise ultra-precise machining, micro-electromechanical systems, micro-operation robots, biotechnology, aerospace and the like.
Description
Technical Field
The application relates to a micro-nano precision device, in particular to a rotary motion driving device.
Background
The precise driving technology with micro/nano positioning precision is a key technology in the fields of high-tip science and technology such as ultra-precise machining and measurement, optical engineering, intelligent robots, modern medical treatment, aerospace science and technology and the like. In order to realize the micro/nano-scale output precision, the application of modern precise driving technology puts higher requirements on the precision of the device. The traditional device has low output precision and large overall size, and cannot meet the requirements of a precision system in modern advanced technology on micro/nano-level high precision and tiny device size. The piezoelectric device has the advantages of small volume size, high displacement resolution, large output load, high energy conversion rate and the like, can realize micro/nano-scale output precision, and has been increasingly applied to micro-positioning and precise ultra-precise machining. The piezoelectric device is mainly divided into an ultrasonic type, an inchworm type and an inertial type, and the ultrasonic type piezoelectric device has a compact structure, low noise, low output power, low efficiency and short service life due to serious abrasion problem; the inchworm type piezoelectric device has higher output precision and bearing capacity, but has complex structure and difficult control; the inertial piezoelectric device has a simple structure, is easy to control, can realize large-stroke high-precision motion, but often has a rollback phenomenon in the motion process, so that the output efficiency is reduced. Therefore, it is necessary to design an inertial piezoelectric device capable of eliminating the rollback phenomenon.
Disclosure of Invention
The present application is directed to a rotary motion driving device that solves the above-mentioned problems of the prior art. Under the excitation of voltage signals, the driving unit of the device can drive the rotor to rotate, the spring mechanism is contacted with the rotor in the movement process and generates friction force, the rollback of the rotor in the movement process can be eliminated, and the efficient rotation movement is realized.
The above object of the present application is achieved by the following technical solutions:
a rotary motion driving device comprises a driving unit, a spring mechanism, a rotor, a screw and a base, wherein the driving unit is contacted with the rotor and is arranged on the base through the screw; one end of the spring mechanism is contacted with the rotor, and the other end of the spring mechanism is arranged on the base; under the excitation of voltage signals, the device driving unit can drive the rotor to rotate, the spring mechanism is contacted with the rotor in the movement process and generates friction force, and the rollback of the rotor in the movement process can be eliminated, so that the rotary movement is realized.
The driving unit comprises a piezoelectric stack, a pre-tightening wedge block and a flexible hinge mechanism, wherein the piezoelectric stack and the pre-tightening wedge block are arranged in the flexible hinge mechanism, the pre-tightening force can be adjusted through the pre-tightening wedge block, the flexible hinge mechanism is arranged on the base through a screw, the arc-shaped bulge at the top of the flexible hinge mechanism is contacted with the rotor, and the initial pre-tightening force between the flexible hinge mechanism and the rotor can be adjusted through the screw; the flexible hinge mechanism comprises four thin-wall flexible hinges, and the piezoelectric stack can push the arc-shaped protrusions to push against the rotor and drive the rotor to rotate when being electrically stretched.
The spring mechanism is formed by fixedly connecting an arc block, a spring and a threaded knob into a whole, the arc block is in contact with the rotor, the threaded knob is arranged on the base, and the pretightening force between the arc block and the rotor can be adjusted through the threaded knob.
The application has the main advantages that: under the excitation of voltage signals, the device driving unit can drive the rotor to rotate, the spring mechanism is contacted with the rotor in the movement process and generates friction force, the rollback of the rotor in the movement process can be eliminated, and the efficient rotation movement is realized. The device can be applied to important scientific engineering fields such as precise ultra-precise machining, micro-operation robots, micro-electromechanical systems, large-scale integrated circuit manufacturing, biotechnology and the like.
Drawings
The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification, illustrate and explain the application and are not to be construed as limiting the application.
FIG. 1 is an isometric view of the present application;
FIG. 2 is a schematic view of a drive unit flexible hinge mechanism of the present application;
FIG. 3 is a schematic view of a spring mechanism flexible hinge mechanism of the present application;
in the figure:
1. a driving unit; secondly, a rotor; third, the base;
4. a spring mechanism; fifthly, screws; 1-1, piezoelectric stack;
1-2, pre-tightening a wedge block; 1-3, a flexible hinge mechanism; 4-1, a threaded knob;
4-2, springs; 4-3, arc blocks.
Detailed Description
The details of the present application and its specific embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, a rotary motion driving device mainly comprises a driving unit (1), a spring mechanism (4), a rotor (2), a screw (5) and a base (3), wherein the driving unit (1) is in contact with the rotor (2) and is mounted on the base (3) through the screw (5); one end of the spring mechanism (4) is contacted with the rotor (2), and the other end of the spring mechanism is arranged on the base (3); under the excitation of voltage signals, the device driving unit (1) can drive the rotor (2) to rotate, the spring mechanism (4) is contacted with the rotor (2) in the movement process and generates friction force, and the rollback of the rotor (2) in the movement process can be eliminated, so that the rotary movement is realized.
The driving unit (1) comprises a piezoelectric stack (1-1), a pre-tightening wedge block (1-2) and a flexible hinge mechanism (1-3), wherein the piezoelectric stack (1-1) and the pre-tightening wedge block (1-2) are arranged in the flexible hinge mechanism (1-3), the pre-tightening force can be adjusted through the pre-tightening wedge block (1-2), the flexible hinge mechanism (1-3) is arranged on the base (3) through a screw (5), the arc-shaped bulge at the top of the flexible hinge mechanism (1-3) is in contact with the rotor (2), and the initial pre-tightening force between the flexible hinge mechanism (1-3) and the rotor (2) can be adjusted through the screw (5); the flexible hinge mechanism (1-3) comprises four thin-wall flexible hinges, and the piezoelectric stack (1-1) can be electrically stretched to push the arc-shaped bulge to push against the rotor (2) and drive the rotor (2) to rotate.
The spring mechanism (4) is formed by fixedly connecting an arc-shaped block (4-3), a spring (4-2) and a threaded knob (4-1), wherein the arc-shaped block (4-3) is in contact with the rotor (2), the threaded knob (4-1) is arranged on the base (3), and the pretightening force between the arc-shaped block (4-3) and the rotor (2) can be adjusted through the threaded knob (4-1).
Referring to fig. 1 to 3, the specific working procedure of the present application is as follows:
initial state: the adjusting screw (5) controls the initial pre-tightening force between the flexible hinge mechanism (1-3) and the rotor (2), and the adjusting screw knob (4-3) controls the pre-tightening force between the arc-shaped block (4-3) and the rotor (2). A zigzag or pulse voltage signal is loaded on the piezoelectric stack (1-1), and the piezoelectric stack (1-1) is not electrified;
taking a saw-tooth voltage signal as an example, when the voltage slowly rises, the piezoelectric stack (1-1) is electrified, the piezoelectric stack (1-1) stretches through the inverse piezoelectric effect, the flexible hinge mechanism (1-3) is driven to deform, the arc-shaped bulge of the flexible hinge mechanism (1-3) compresses the rotor (2), and meanwhile, the rotor (2) is driven to rotate;
when the voltage drops rapidly, the piezoelectric stack (1-1) starts to lose electricity and returns to an initial state, the flexible hinge mechanism (1-3) also returns to the initial state, in the process, the friction force between the flexible hinge mechanism (1-3) and the rotor (2) can cause the rotor (2) to generate a backspacing motion, the arc-shaped block (4-3) and the rotor (2) can generate a reverse friction force for preventing the rotor (2) from backspacing, the rotor (2) is prevented from backspacing, and the rotor (2) is still kept at a rotated position;
the device can realize large-stroke high-efficiency rotary motion by repeating the steps.
According to the rotary motion driving device, the driving unit (1) can drive the rotor (2) to rotate under the excitation of a voltage signal, the spring mechanism (4) is in contact with the rotor (2) in the motion process and generates friction force, the rollback of the rotor (2) in the motion process can be eliminated, the large-stroke rotary motion is realized, and the rotary motion driving device has the characteristics of small heating, stable driving, reliability and high efficiency.
Claims (2)
1. A rotary motion driving device characterized in that: comprises a driving unit, a spring mechanism, a rotor, a screw and a base; the driving unit is contacted with the rotor and is arranged on the base through a screw; one end of the spring mechanism is contacted with the rotor, and the other end of the spring mechanism is arranged on the base; under the excitation of voltage signals, the driving unit can drive the rotor to rotate, the spring mechanism is contacted with the rotor in the movement process and generates friction force, the rollback of the rotor in the movement process can be eliminated, and the rotation movement is realized, the driving unit comprises a piezoelectric stack, a pre-tightening wedge block and a flexible hinge mechanism, the piezoelectric stack and the pre-tightening wedge block are arranged in the flexible hinge mechanism, the pre-tightening force can be adjusted through the pre-tightening wedge block, the spring mechanism is formed by fixedly connecting an arc block, a spring and a thread knob into a whole, the arc block is contacted with the rotor, the thread knob is arranged on the base, and the pre-tightening force between the arc block and the rotor can be adjusted through the thread knob.
2. A rotary motion driving device according to claim 1, characterized in that: the flexible hinge mechanism is arranged on the base through a screw, an arc-shaped bulge at the top of the flexible hinge mechanism is contacted with the rotor, and the initial pretightening force between the flexible hinge mechanism and the rotor can be adjusted through the screw; the flexible hinge mechanism comprises four semicircular thin-wall flexible hinges, and the piezoelectric stack can push the arc-shaped protrusions to push against the rotor and drive the rotor to rotate when being electrically stretched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010049896.8A CN111162691B (en) | 2020-01-08 | 2020-01-08 | Rotary motion driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010049896.8A CN111162691B (en) | 2020-01-08 | 2020-01-08 | Rotary motion driving device |
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| Publication Number | Publication Date |
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| CN111162691A CN111162691A (en) | 2020-05-15 |
| CN111162691B true CN111162691B (en) | 2023-08-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002281772A (en) * | 2001-03-19 | 2002-09-27 | Jiromaru Tsujino | Ultrasonic motor using static pressure application apparatus having non-linear characteristic |
| CN203457075U (en) * | 2013-06-19 | 2014-02-26 | 浙江师范大学 | Friction-variable type non-symmetrical clamping inertial piezoelectric rotation driver |
| CN106849743A (en) * | 2017-04-01 | 2017-06-13 | 吉林大学 | Stick-slip linear actuator based on piezoelectric fabric |
| CN107124119A (en) * | 2017-06-16 | 2017-09-01 | 吉林大学 | A kind of pair of butterfly stator piezoelectricity straight line driver |
| CN108092545A (en) * | 2018-01-12 | 2018-05-29 | 长春工业大学 | Multiple degrees of freedom piezoelectricity stick-slip micro-nano locating platform and its driving method |
| CN108111052A (en) * | 2018-03-09 | 2018-06-01 | 吉林大学 | Couple the bionical piezoelectricity locating platform and control method with parasitic motion principle of looper |
-
2020
- 2020-01-08 CN CN202010049896.8A patent/CN111162691B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002281772A (en) * | 2001-03-19 | 2002-09-27 | Jiromaru Tsujino | Ultrasonic motor using static pressure application apparatus having non-linear characteristic |
| CN203457075U (en) * | 2013-06-19 | 2014-02-26 | 浙江师范大学 | Friction-variable type non-symmetrical clamping inertial piezoelectric rotation driver |
| CN106849743A (en) * | 2017-04-01 | 2017-06-13 | 吉林大学 | Stick-slip linear actuator based on piezoelectric fabric |
| CN107124119A (en) * | 2017-06-16 | 2017-09-01 | 吉林大学 | A kind of pair of butterfly stator piezoelectricity straight line driver |
| CN108092545A (en) * | 2018-01-12 | 2018-05-29 | 长春工业大学 | Multiple degrees of freedom piezoelectricity stick-slip micro-nano locating platform and its driving method |
| CN108111052A (en) * | 2018-03-09 | 2018-06-01 | 吉林大学 | Couple the bionical piezoelectricity locating platform and control method with parasitic motion principle of looper |
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| CN111162691A (en) | 2020-05-15 |
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