CN214626828U - Time-lag effect inertial piezoelectric driver based on flexible hinge - Google Patents
Time-lag effect inertial piezoelectric driver based on flexible hinge Download PDFInfo
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- CN214626828U CN214626828U CN202120643600.5U CN202120643600U CN214626828U CN 214626828 U CN214626828 U CN 214626828U CN 202120643600 U CN202120643600 U CN 202120643600U CN 214626828 U CN214626828 U CN 214626828U
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Abstract
The utility model relates to an inertia formula piezoelectric actuator based on flexible hinge's time lag effect belongs to the precision machinery field. The piezoelectric actuator comprises a base, a piezoelectric element, a flexible hinge, a mass block, a sliding track and a mover. The piezoelectric element converts electric energy into kinetic energy based on the inverse piezoelectric effect of the piezoelectric ceramic, and drives the main mass block to move by using the inertia principle. The rear mass block generates secondary motion to the mechanism by using the time-lag effect of the flexible hinge. All the mass blocks are arranged on the sliding track, so that the friction force generated by the mechanism and the base is reduced. The mover is used as an output terminal of the driving device and is arranged above the main mass block. The device has the characteristics of stable movement, simple structure, easy control, easy realization of large-stroke movement, no electromagnetic interference, compact structure and light weight. At present, the method has good application prospect in the fields of nanotechnology, optical instruments and micromanipulation.
Description
Technical Field
The utility model relates to a precision machinery field, in particular to time lag effect based on flexible hinge produces inertial type piezoelectric actuator that the secondary is strikeed. Can be used in the fields of nanotechnology, optical instruments, micromanipulation, etc
Background
The piezoelectric driving technology is a precise driving technology for controlling mechanical deformation and further outputting force and displacement based on the inverse piezoelectric effect of a piezoelectric material, has the characteristics of simple structure, high precision, high resolution, electromagnetic interference resistance and the like, and has important application in the fields of optical instruments, nanotechnology, medical instruments and the like. The piezoelectric driving device has more motion principles, and mainly comprises an inertial motion principle, an inchworm motion principle, a resonance principle and the like at present, wherein the inertial motion principle is divided into a friction inertial principle and an impact inertial principle, and has the characteristic of simple structure; the inchworm motion principle is controlled more complicated; the resonance principle structure size and the power supply equipment have strict requirements. The inertia actuating mechanism has been widely used in the fields of microsurgery microscope, semiconductor manufacture, precise optical alignment, etc. due to its long distance, ultra-precision and miniaturization characteristics. However, the inertia impact principle utilizes the inertia of the mass block to realize impact motion, and the effect of friction force needs to be overcome, so that the efficiency is low.
In summary, although the impact inertia principle has a simple structure, the problem of low efficiency is very obvious, and further research on the specific implementation process of the principle is needed to reuse the efficiency.
Disclosure of Invention
An object of the utility model is to provide a time lag effect produces inertial type piezoelectric actuator that secondary strikes based on flexible hinge solves the above-mentioned problem that prior art exists. The utility model utilizes the inertia driving principle of the mass block to make the mechanism move in the process of extension and shortening of the piezoelectric element; the rear mass block connected through the flexible hinge generates delayed secondary impact motion on the basis of the original primary impact motion by using the hysteresis effect of the flexible hinge; meanwhile, the linear displacement output efficiency is improved by utilizing the guiding function of the sliding guide rail connected with the main mass block. The utility model provides an inertia formula piezoelectric actuator who produces secondary impact based on flexible hinge's time lag effect has characteristics such as small, with low costs, control is simple, positioning accuracy is high, efficiency optimization.
The above object of the utility model is realized through following technical scheme:
the inertial piezoelectric driver generates secondary impact based on the time lag effect of the flexible hinge, generates an additional impact effect through the flexible hinge and an additional mass block, and improves the driving efficiency; the method comprises the following steps: the mechanism comprises a base 1, a sliding guide rail 2, a main mass block 3, a front mass block 4, a rear mass block 5, a piezoelectric element 6, a flexible hinge 7 and a rotor 8, wherein the main mass block 3 is provided with three installation parts for respectively installing the front piezoelectric element 6, the flexible hinge 7 and the rotor 8, and the bottom of the main mass block is also provided with four threaded holes for installing the whole mechanism on the sliding guide rail 2; under the action of an electric signal in the working process, the piezoelectric element 6 drives the main mass block 3, the front mass block 4 and the rear mass block 5 to generate inertial motion on the sliding guide rail 2, and meanwhile, drives the rotor 8 fixed on the main mass block 3 to move.
The piezoelectric element 6 is fixed on the main mass block 3, the front mass block 4 is fixed at the other end of the main mass block, the piezoelectric element is excited by an electric signal to generate periodic slow extension and fast telescopic motion in the working process, and the front mass block 4 keeps the original state to continue moving forwards due to the inertia effect, so that the main mass block 3 is driven to move forwards, and the impact motion in the first stage is realized.
The flexible hinge 7 is fixed on the main mass block 3, and the other end is fixed on the rear mass block 5. In the moving process, the inertial motion of the main mass block 3 is transmitted to the rear mass block 5, and the rear mass block 5 generates delay motion which is asynchronous with the main mass block 3 due to the time delay effect of the flexible hinge, so that the rear mass block 5 impacts the main mass block 3 forwards, and the impact motion of the second stage is realized.
The rotor 8 is fixed above the main mass block 3, the front mass block 4 generates slow forward motion in the slow extension process of the piezoelectric element 6, the front mass block 4 continues to move forward under the action of self inertia in the fast contraction process of the piezoelectric element 6, meanwhile, the main mass block 3 overcomes the self friction force to generate impact motion forward, and the motion is transmitted to the rear mass block 5 by the flexible hinge 7; due to the time lag effect of the flexible hinge, the rear mass block 5 generates secondary impact motion to the main mass block 3 by using the inertia of the rear mass block after certain delay, and positive displacement is accumulated through periodic electric signal excitation to generate macroscopic linear motion.
The beneficial effects of the utility model reside in that: the secondary impact is realized by utilizing the time delay effect of the flexible hinge, so that the efficiency is improved. Compact structure, low cost, simple control, no electromagnetic interference and good application prospect in the fields of optical instruments, medical instruments and micro-operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate example embodiments of the invention and together with the description serve to explain the invention without limitation.
FIG. 1 is a schematic view of the overall structure of the present invention
FIG. 2 is a schematic view of the structure of the flexible hinge of the present invention
FIG. 3 is a schematic view of the exercise structure of the present invention
FIG. 4 is a schematic diagram of the movement of the present invention
FIG. 5 is a driving electrical signal diagram of the present invention
In the figure: 1. a base; 2. a sliding guide rail; 3. a main mass block; 4. a pre-quality block; 5. a rear mass block; 6. a piezoelectric element; 7. a flexible hinge; 8. and a mover.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 4, the present invention discloses an inertial piezoelectric actuator based on a flexible hinge, which generates a secondary impact by using a time lag effect, and comprises a base, a sliding guide rail, a main mass block, a front mass block, a rear mass block, a piezoelectric element, a flexible hinge, and a mover. The base is matched with the sliding guide rail to enable the main mass block to generate linear motion; the piezoelectric element converts electric energy into mechanical energy based on an inverse piezoelectric effect; the front and rear mass blocks provide inertia action required by movement; the flexible hinge generates a time-lag effect and is used for connecting and supporting the rear mass block; the mover serves as an output terminal of the driving device. The utility model provides an utilize flexible hinge's time lag effect to realize that the secondary strikes and improved work efficiency. Compact structure, low cost, simple control, no electromagnetic interference and good application prospect in the fields of optical instruments, medical instruments and micro-operation.
Referring to fig. 1 to 4, the present invention discloses an inertial piezoelectric actuator based on a flexible hinge, which generates a secondary impact by using a time lag effect, and comprises a base, a sliding guide rail, a main mass block, a front mass block, a rear mass block, a piezoelectric element, a flexible hinge, and a mover.
The main mass block 3 is provided with three mounting parts for respectively mounting a front piezoelectric element 6, a flexible hinge 7 and a rotor 8, and the bottom of the main mass block is also provided with four threaded holes for mounting the whole mechanism on the sliding guide rail 2. Under the action of an electric signal in the working process, the piezoelectric element 6 drives the main mass block 3, the front mass block 4 and the rear mass block 5 to generate inertial motion on the sliding guide rail 2, and meanwhile, drives the rotor 8 fixed on the main mass block 3 to move.
The piezoelectric element 6 is fixed on the main mass block 3, the front mass block 4 is fixed at the other end of the main mass block, the piezoelectric element is excited by an electric signal to generate periodic slow extension and fast telescopic motion in the working process, and the front mass block 4 keeps the original state to continue moving forwards due to the inertia effect, so that the main mass block 3 is driven to move forwards, and the impact motion in the first stage is realized.
The flexible hinge 7 is fixed on the main mass block 3, and the other end is fixed on the rear mass block 5. In the moving process, the inertial motion of the main mass block 3 is transmitted to the rear mass block 5, and the rear mass block 5 generates delay motion which is asynchronous with the main mass block 3 due to the time delay effect of the flexible hinge, so that the rear mass block 5 impacts the main mass block 3 forwards, and the impact motion of the second stage is realized.
The rotor 8 is fixed above the main mass block 3, the front mass block 4 generates slow forward motion in the slow extension process of the piezoelectric element 6, the front mass block 4 continues to move forward under the action of self inertia in the fast contraction process of the piezoelectric element 6, meanwhile, the main mass block 3 overcomes self friction force to generate impact motion forward, and the motion is transmitted to the rear mass block 5 by the flexible hinge 7. Due to the time lag effect of the flexible hinge, the rear mass block 5 generates secondary impact motion to the main mass block 3 by using the inertia of the rear mass block after certain delay, and positive displacement is accumulated through periodic electric signal excitation to generate macroscopic linear motion.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made to the present invention should be included in the protection scope of the present invention.
Claims (1)
1. An inertial piezoelectric actuator based on the time lag effect of a flexible hinge, characterized in that: the secondary impact effect is generated through the flexible hinge and the additional mass block, so that the driving efficiency is improved; the mechanism comprises a base (1), a sliding guide rail (2), a main mass block (3), a front mass block (4), a rear mass block (5), a piezoelectric element (6), a flexible hinge (7) and a rotor (8), wherein the main mass block (3) is provided with three mounting parts for mounting the front piezoelectric element (6), the flexible hinge (7) and the rotor (8) respectively, and the bottom of the main mass block is also provided with four threaded holes for mounting the whole mechanism on the sliding guide rail (2); under the action of an electric signal in the working process, the piezoelectric element (6) drives the main mass block (3), the front mass block (4) and the rear mass block (5) to generate inertial motion on the sliding guide rail (2) and simultaneously drives the rotor (8) fixed on the main mass block (3) to move;
the piezoelectric element (6) is fixed on the main mass block (3), the other end of the piezoelectric element is simultaneously fixed with the front mass block (4), and the front mass block (4) keeps the original state to continue moving forwards due to inertia, so that the main mass block (3) is driven to move forwards through inertia;
the flexible hinge (7) is fixed on the main mass block (3), and the other end of the flexible hinge is simultaneously fixed with the rear mass block (5); in the motion process, the motion of the main mass block (3) is transmitted to the rear mass block (5), so that the rear mass block (5) generates secondary impact motion to the mechanism;
the rotor (8) is fixed above the main mass block (3), the front mass block (4) generates slow forward motion in the slow extension process of the piezoelectric element (6), the rear mass block (5) generates secondary impact motion to the main mass block (3) by utilizing the inertia of the rear mass block after certain delay under the combined action of a sawtooth wave signal and a flexible hinge, and the forward displacement is accumulated through periodic electric signal excitation to generate macroscopic linear motion.
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| CN202120643600.5U CN214626828U (en) | 2021-03-30 | 2021-03-30 | Time-lag effect inertial piezoelectric driver based on flexible hinge |
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| CN202120643600.5U CN214626828U (en) | 2021-03-30 | 2021-03-30 | Time-lag effect inertial piezoelectric driver based on flexible hinge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865597A (en) * | 2021-03-30 | 2021-05-28 | 吉林大学 | Time-lag effect inertial piezoelectric driver based on flexible hinge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865597A (en) * | 2021-03-30 | 2021-05-28 | 吉林大学 | Time-lag effect inertial piezoelectric driver based on flexible hinge |
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