阅读说明：本技术 一种双层环压电旋转驱动器 (Double-layer ring piezoelectric rotary driver ) 是由 董景石 张博闻 徐智 刘畅 曹义 于 2021-03-30 设计创作，主要内容包括：本发明涉及一种双层环压电旋转驱动器。包括底座、转动环、压电元件、柔性铰链、转子。压电元件通过压电材料的逆压电效应将电能转化为机械能,利用惯性原理驱动内环旋转。柔性铰链连接内外环,利用柔性铰链的时滞效应,在内环发生转动后外环会产生同方向的延时转动,使整体机构产生两次同方向的转动。转子作为驱动装置的输出终端,通过螺纹安装在内环上方。机构整体安装于底座上方。具有转动平稳、响应迅速、转速较快等特点。在光学仪器、航空航天、显微操作领域有良好的应用前景。(The invention relates to a double-layer ring piezoelectric rotary driver. Comprises a base, a rotating ring, a piezoelectric element, a flexible hinge and a rotor. The piezoelectric element converts electric energy into mechanical energy through the inverse piezoelectric effect of the piezoelectric material, and drives the inner ring to rotate by utilizing the inertia principle. The flexible hinge is connected with the inner ring and the outer ring, and the outer ring can generate time delay rotation in the same direction after the inner ring rotates by utilizing the time delay effect of the flexible hinge, so that the whole mechanism can generate twice rotation in the same direction. The rotor is used as an output terminal of the driving device and is installed above the inner ring through threads. The mechanism is integrally arranged above the base. The device has the characteristics of stable rotation, quick response, high rotating speed and the like. Has good application prospect in the fields of optical instruments, aerospace and micromanipulation.)

1. A double-ring piezoelectric rotary actuator, comprising: the secondary inertial rotation motion is realized through the double-layer ring structure, so that the rotation efficiency is improved; comprises a base (1), an inner ring (2), an outer ring (3), a piezoelectric element (4), a flexible hinge (5) and a rotor (6); the inner ring (2) is provided with three mounting positions for mounting the piezoelectric element (4), the flexible hinge (5) and the rotor (6), and the bottom of the inner ring (2) is mounted on a base shaft of the base (1) to ensure that the driving mechanism can rotate; under the action of an electric signal in the working process, the piezoelectric element (4) drives the inner layer ring (2) and the outer layer ring (3) to generate inertial motion, so that the rotor (6) is driven to rotate;

the piezoelectric elements (4) are fixed on two sides of the beam of the inner ring (2), and are excited by an electric signal to generate modal change in the working process, so that the beam of the inner ring (2) generates slow bending deformation, and the outer edge of the inner ring (2) is driven to generate slow rotary motion; when the electric signal excitation mode changes suddenly, the outer edge of the inner ring (2) still keeps the original direction rotation due to the inertia of the inner ring, so that the inner ring rotates around the base shaft integrally;

the flexible hinge (5) is fixed at the outer edge of the inner ring (2), the other end of the flexible hinge is connected with the outer ring (3), the flexible hinge (5) enables the outer ring (3) to generate asynchronous delay rotation after the inner ring (2) rotates by utilizing the time lag effect of the flexible hinge, and the outer ring (3) continues to rotate in the original direction due to the inertia effect of the outer ring after reaching the synchronous position with the inner ring (2), so that the driving device generates two rotations;

the rotor (6) is installed above the inner ring (2) through threads, after the piezoelectric element (4) is excited by inputting an electric signal which rises slowly and falls quickly, the inner ring (2) rotates due to the inertia of the inner ring, and meanwhile, the outer ring (3) generates delayed rotation which is asynchronous with the inner ring (2) by utilizing the time delay effect of the flexible hinge; the outer ring (3) drives the whole mechanism to rotate again due to the self inertia effect to generate a secondary rotation effect, and the rotor (6) rotates continuously around the base shaft of the base (1) in the same direction by adjusting the excitation of the input electric signal.

Technical Field

The invention relates to the field of precision machinery, in particular to a double-layer ring piezoelectric rotary driver. Can be used in the fields of optical instruments, aerospace, micromanipulation and the like.

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 is widely applied to the fields of microsurgery microscopes, semiconductor manufacturing, precise optical alignment and the like due to the characteristics of high corner precision and easiness in miniaturization of an inertia actuating mechanism. However, the inertial rotating drive has great energy loss in the moving process and low efficiency.

In summary, certain analysis and improvement needs to be performed on the inertial rotation driver to reuse the performance.

Disclosure of Invention

The present invention is directed to a dual ring piezoelectric rotary actuator that solves some of the problems identified above. The inner ring moves in the process of changing the mode of the cross beam by utilizing the inertial motion principle of the inner ring; and the movement is transmitted to the outer ring through the flexible hinge connected with the inner ring, and the inner ring which generates the rotary movement is driven to rotate again by utilizing the time delay effect of the flexible hinge and the inertia principle of the outer ring, so that the rotor on the inner ring is further driven to rotate. The double-layer ring piezoelectric rotary driver provided by the invention is based on an inertia driving principle and a time-lag principle of the flexible hinge, and the same-time excitation signal generates two asynchronous rotary motions, so that the efficiency of the driving mechanism is improved, and the double-layer ring piezoelectric rotary driver has the characteristics of small volume, low cost, simplicity in control, high corner precision, optimized efficiency and the like.

The above object of the present invention is achieved by the following technical solutions:

a double-layer ring piezoelectric rotary driver realizes secondary inertial rotary motion through a double-layer ring structure, and improves the rotation efficiency; the method comprises the following steps: the piezoelectric device comprises a base 1, an inner ring 2, an outer ring 3, a piezoelectric element 4, a flexible hinge 5 and a rotor 6; the inner ring 2 is provided with three mounting positions for mounting a piezoelectric element 4, a flexible hinge 5 and a rotor 6, and the bottom of the inner ring 2 is mounted on a base shaft of the base 1 to ensure that a driving mechanism can rotate; under the action of an electric signal in the working process, the piezoelectric element 4 drives the inner ring 2 and the outer ring 3 to generate inertial motion, so that the rotor 6 is driven to rotate.

The piezoelectric elements 4 are fixed on two sides of the beam of the inner ring 2, and are excited by an electric signal to generate modal change in the working process, so that the beam of the inner ring 2 generates slow bending deformation, and the outer edge of the inner ring 2 is driven to generate slow rotary motion; when the electric signal excitation mode changes suddenly, the outer edge of the inner ring 2 still keeps the original direction rotation due to the inertia of the inner ring, so that the inner ring rotates around the base shaft integrally.

The flexible hinge 5 is fixed on the outer edge of the inner ring 2, and the other end of the flexible hinge is connected with the outer ring 3. By utilizing the time lag effect of the flexible hinge, after the inner ring 2 rotates, the flexible hinge 5 enables the outer ring 3 to generate asynchronous delayed rotation, and after the outer ring 3 reaches the synchronous position with the inner ring 2, the outer ring continues to rotate along the original direction due to the inertia effect of the outer ring, so that the driving device generates twice rotation.

The rotor 6 is installed above the inner ring 2 through threads, after the piezoelectric element 4 is excited by inputting an electric signal which slowly rises and quickly falls, the inner ring 2 rotates due to the inertia of the inner ring, and meanwhile, the outer ring 3 generates delayed rotation which is asynchronous with the inner ring 2 by utilizing the time lag effect of the flexible hinge. The outer ring 3 drives the whole mechanism to rotate again due to the self inertia effect to generate a secondary rotation effect, and the rotor 6 rotates continuously around the base shaft of the base 1 in the same direction by adjusting the excitation of the input electric signal.

The invention has the beneficial effects that: the double-layer ring type rotating mechanism is provided, so that the efficiency of converting electric energy into mechanical energy is improved, and the double-layer ring type rotating mechanism has the characteristics of simple structure, high corner precision and the like, and has good application prospects in micromanipulation, optical instruments, medical equipment and the like.

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 embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention.

FIG. 1 is a schematic diagram of the overall structure of the present invention

FIG. 2 is a schematic diagram of a two-layer ring structure of the present invention

FIG. 3 is a schematic view of a piezoelectric ceramic patch according to the present invention

FIG. 4 is a schematic diagram of the movement of the present invention

FIG. 5 is a driving signal diagram of the present invention

In the figure: 1. a base; 2. an inner ring; 3. an outer ring; 4. a piezoelectric element; 5. a flexible hinge; 6. a rotor; 41. a left piezoelectric wafer; 42. and a right piezoelectric wafer.

Detailed Description

The details and embodiments of the present invention are further described below with reference to the accompanying drawings.

Referring to fig. 1, 2 and 4, the double-ring piezoelectric rotary actuator of the present invention realizes secondary inertial rotation motion by a double-ring structure, thereby improving rotation efficiency; the method comprises the following steps: base, inlayer ring, outer ring, piezoelectric element, flexible hinge, rotor.

The inner ring 2 is provided with three mounting positions for mounting a piezoelectric element 4, a flexible hinge 5 and a rotor 6, and the bottom of the inner ring 2 is mounted on a base shaft of the base 1 to ensure that a driving mechanism can rotate; under the action of an electric signal in the working process, the piezoelectric element 4 drives the inner ring 2 and the outer ring 3 to generate inertial motion, so that the rotor 6 is driven to rotate.

The piezoelectric elements 4 are fixed on two sides of the beam of the inner ring 2, and are excited by an electric signal to generate modal change in the working process, so that the beam of the inner ring 2 generates slow bending deformation, and the outer edge of the inner ring 2 is driven to generate slow rotary motion; when the electric signal excitation mode changes suddenly, the outer edge of the inner ring 2 still keeps the original direction rotation due to the inertia of the inner ring, so that the inner ring rotates around the base shaft integrally.

The flexible hinge 5 is fixed on the outer edge of the inner ring 2, and the other end of the flexible hinge is connected with the outer ring 3. By utilizing the time lag effect of the flexible hinge, after the inner ring 2 rotates, the flexible hinge 5 enables the outer ring 3 to generate asynchronous delayed rotation, and after the outer ring 3 reaches the synchronous position with the inner ring 2, the outer ring continues to rotate along the original direction due to the inertia effect of the outer ring, so that the driving device generates twice rotation.

The rotor 6 is installed above the inner ring 2 by threads, after the piezoelectric element 4 is excited by inputting an electric signal which slowly rises and quickly falls, the inner ring 2 rotates due to the inertia of the inner ring, and meanwhile, the outer ring 3 generates delayed rotation which is asynchronous with the inner ring 2 by utilizing the time lag effect of the flexible hinge; the outer ring 3 drives the whole mechanism to rotate again due to the self inertia effect to generate a secondary rotation effect, and the rotor 6 rotates continuously around the base shaft of the base 1 in the same direction by adjusting the excitation of the input electric signal.

Referring to fig. 2 and 3, the inner ring 2 can be matched with the base shaft of the base 1, the piezoelectric element 4 is fixed on the transverse shaft of the inner ring 2, and the left piezoelectric wafer 41 and the right piezoelectric wafer 42 are respectively excited by inputting opposite electric signals, so that the transverse beam can generate the same-direction rotation effect on the inner ring.

Referring to fig. 2 and 3, the double-layer ring is divided into three parts by the flexible hinge 5, and the three parts are uniformly distributed to play a role in stabilizing and fixing the outer-layer ring 3 and reduce the vibration in the rotating process.

Referring to fig. 2 and 3, the inner ring 2 has four threaded holes for fixing the rotor 6 thereon, so that the rotor 6 and the inner ring 2 rotate synchronously.

Referring to fig. 5, the electrical signals in the periodic slow-rising phase and the rapid-falling phase are sawtooth voltage signals.

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 of the present invention shall be included in the protection scope of the present invention.