Piezoelectric ceramic motor for multi-dimensional rotating clamp
By dividing the piezoelectric ceramic plates on the stator into four pieces and driving them with two AC signals with a 90° phase difference, low-voltage driving of the multidimensional rotary fixture was achieved, which improved production efficiency and stability and solved the problems of complex structure and low efficiency of existing piezoelectric ceramic actuators.
Patent Information
- Application Number
- CN202423290913.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The technical problems with existing piezoelectric ceramic actuators that require a drive motor are: existing piezoelectric ceramic actuators have complex structures, nonlinear motion hysteresis, high drive voltage, and low operating efficiency.
A piezoelectric ceramic motor for a multidimensional rotary fixture is used. The piezoelectric ceramic plates on the stator are divided into four pieces, and the four regions are polarized by two AC signals sinωt and cosωt with a phase difference of 90°, respectively, to realize the yaw motion of the stator. Combined with the frictional coupling of the internal and external threads, the rotor is driven to rotate.
It achieves low-voltage drive, improves production efficiency and stability, reduces production costs, and makes up for the shortcomings of short stroke and weak impact resistance.
Smart Images
Figure CN223928242U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of piezoelectric actuators, and in particular to a piezoelectric ceramic motor for a multidimensional rotary clamp. Background Technology
[0002] With the development of modern science and technology, the demand for high integration and high precision of motors in various application fields has greatly increased compared to previous electromagnetic motors. However, because the existing piezoelectric ceramic actuators utilize bending or rotational vibration to achieve a high driving voltage, although high voltage can increase micro-vibration and improve the driving effect, many devices actually require lower voltage, resulting in low operating efficiency. Moreover, the complex structure and nonlinear motion hysteresis of existing piezoelectric ceramic actuators limit their development. Summary of the Invention
[0003] To address the shortcomings of existing ceramic actuators, such as high driving voltage, low operating efficiency, complex structure, and nonlinear motion hysteresis, this invention provides a piezoelectric ceramic motor for a multidimensional rotary fixture. The stator plates are divided into four piezoelectric ceramic sheets in two regions. Two AC signals, sinωt and cosωt, with a 90° phase difference, are used to strike the two regions along the thickness direction of the piezoelectric ceramic sheets, achieving the stator's oscillating motion and thus realizing the macroscopic linear motion of the motor rotor. This significantly reduces production costs and improves production efficiency. Compared to other piezoelectric ceramic actuators with small stroke and weak impact resistance, the unique structure of this invention provides higher stability.
[0004] The technical solution of this utility model is: a piezoelectric ceramic motor for a multidimensional rotary clamp, comprising a stator, a rotor, and piezoelectric ceramic plates. The stator includes stator plates and a middle cylinder. The stator plates are disposed on the outer surface of the middle cylinder, and the rotor is disposed inside the middle cylinder. Four piezoelectric ceramic plates are attached to the surface of the stator plates, and the four piezoelectric ceramic plates form a four-section piezoelectric ceramic plate ring. An internal thread is provided on the inner wall of the middle cylinder, and an external thread is provided on the surface of the rotor. The internal thread of the middle cylinder matches the external thread on the surface of the rotor.
[0005] Furthermore, the stator laminations consist of two pieces, which are spaced apart on the outer surface of the middle cylinder to form a dumbbell shape.
[0006] The beneficial effects of this utility model are as follows: By setting the piezoelectric ceramic sheet into four sections and pasting it on the surface of the stator sheet, the piezoelectric ceramic can be driven by the alternating current in the ultrasonic frequency band to deform, thereby realizing the oscillating motion of the stator, which greatly reduces the production cost and production efficiency, and has a better vibration amplification effect and requires a lower voltage; the unique structure of the double stator sheet makes up for the defects of the existing piezoelectric ceramic in terms of small stroke and weak impact resistance. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of the structure of this utility model;
[0008] Figure 2 yes Figure 1 Exploded view;
[0009] Figure 3 This is a front sectional view of the present invention;
[0010] Figure 4 This is a schematic diagram of the polarization method of the piezoelectric ceramic sheet of this utility model. Detailed Implementation
[0011] Figures 1 to 3 As shown, a piezoelectric ceramic motor for a multidimensional rotary clamp includes a stator 1, a rotor 2, and piezoelectric ceramic plates 3. Both the stator 1 and rotor 2 are made of brass. Two stator plates are spaced apart and fitted onto a middle cylinder 1-2 to form a dumbbell shape, which is then welded and fixed. Four piezoelectric ceramic plates are glued to the surfaces of the two stator plates 1-1 with epoxy resin, forming a four-section piezoelectric ceramic plate ring. An internal thread is provided on the inner wall of the middle cylinder 1-2, and an external thread is provided on the surface of the rotor 2. The external thread on the surface of the rotor 2 matches the internal thread of the stator.
[0012] The implementation process of the piezoelectric ceramic motor used in the multidimensional rotary fixture, through the synergistic comparison of modal simulation and harmonious response analysis, yielded that the working mode of stator 1 is mode B11, with a vibration frequency of 41.85kHz; during operation, as... Figure 4 As shown, using two AC signals sinωt and cosωt with a 90° phase difference, the four sections of the piezoelectric ceramic sheet 3 are polarized along the thickness direction of the piezoelectric ceramic sheet 3. The polarization directions of two adjacent sections are the same, while the polarization directions of the other two adjacent sections are opposite. After polarization, the piezoelectric ceramic sheet 3 exhibits a piezoelectric effect along its thickness direction. The piezoelectric effect of the four piezoelectric ceramic sheets 3 on stator segment 1-1 forms a high-frequency rotating B11 mode. The four piezoelectric ceramic plates 3 vibrate in opposite directions, causing the middle cylinder 1-2 to swing, forming a warping vibration. The rotor 2 is driven by the frictional coupling between the internal thread of the inner wall of the middle cylinder 1-2 and the external thread on the surface of the rotor 2, causing the rotor 2 to rotate out of the middle cylinder 2-1. Since the piezoelectric ceramics are controlled by AC signals of sinωt and cosωt, when the phase value of the two AC signals is changed to 270°, the motor can reverse, thus realizing the reciprocating motion of clockwise and counterclockwise rotation.
[0013] In the application scenario of a large-mass multidimensional rotating fixture, two stator plates 1-1, which are set on the middle cylinder 1-2 and form a dumbbell shape, simultaneously perform warping vibrations, together rotating the rotor 2 out of the middle cylinder 2-1.
[0014] Piezoelectric ceramics are single-layer PZT5H ceramic materials, which have advantages such as high temperature, strong piezoelectricity, doping modification, and good stability; the piezoelectric effect refers to the electric current generated by piezoelectric materials when subjected to mechanical pressure.
Claims
1. A piezoelectric ceramic motor for a multi-dimensional rotary clamp, comprising a stator (1), a rotor (2) and a piezoelectric ceramic sheet (3), the stator (1) comprising a stator sheet (1-1) and a middle cylinder (1-2), the stator sheet (1-1) being arranged on the outer surface of the middle cylinder (1-2), the rotor (2) being arranged in the middle cylinder (1-2), characterized in that: Four piezoelectric ceramic sheets (3) are pasted on the surface of the stator lamination (1-1), and the four piezoelectric ceramic sheets (3) form a four-part piezoelectric ceramic sheet ring; an internal thread is provided on the inner wall of the middle cylinder (1-2), and an external thread is provided on the surface of the rotor (2), and the internal thread of the middle cylinder (1-2) matches the external thread on the surface of the rotor (2).
2. The piezoelectric ceramic motor for a multidimensional rotary clamp according to claim 1, characterized in that: The stator lamination (1-1) consists of two pieces, which are spaced apart on the outer surface of the middle cylinder (1-2) to form a dumbbell shape.