Multilayer piezoelectric ceramic actuator

Abstract

The utility model discloses a multilayer piezoelectric ceramic actuator, and particularly relates to the technical field of piezoelectric ceramic components, the multilayer piezoelectric ceramic actuator comprises a ceramic actuator assembly, a stabilizing assembly is wrapped outside the ceramic actuator assembly, the ceramic actuator assembly comprises a plurality of piezoelectric ceramics and a plurality of inner electrodes, the multiple piezoelectric ceramics are arranged at intervals in parallel in multiple layers, an inner electrode is arranged between every two adjacent piezoelectric ceramics, and the multilayer piezoelectric ceramic actuator can provide stable limiting force by arranging the stabilizing assembly. In the sintering process, it can be ensured that the interface quality between each layer of piezoelectric ceramic piece and the metal electrode is in a stable state, contact between the layers is more comprehensive, the quality of a sintered finished product is better, meanwhile, a stable force can be provided through the overall stable assembly, and the service life of the piezoelectric ceramic piece is prolonged. Therefore, the situation that cracks are generated on the edge of the actuator can be avoided, and the service life of the actuator is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of piezoelectric ceramic components, in particular to a multilayer piezoelectric ceramic actuator. Background Art

[0002] Multilayer piezoelectric ceramic actuators are mainly used in precision mechanics and mechanical engineering, life sciences, medicine and biology, gas / hydraulic valves, nanopositioning / high-speed switches, and active and adaptive optics.

[0003] In the prior art, a multilayer piezoelectric ceramic actuator is a piezoelectric ceramic sheet and a metal electrode stacked together. The stacking method is usually to stack the piezoelectric ceramic sheet and the metal electrode together in sequence to form a multilayer structure.

[0004] During the sintering process, it is necessary to maintain a certain restraining force to ensure the interface quality between each layer of piezoelectric ceramics and the metal electrode, to avoid incomplete direct contact between them, to avoid unstable sintering, and the thickness difference between the overlapping part and the non-overlapping part of the internal electrode between the multilayer piezoelectric ceramics gradually increases, resulting in cracks on the edge of the actuator after sintering. Therefore, the piezoelectric ceramic actuator needs to be reinforced. Utility Model Content

[0005] The purpose of the utility model is to provide a multilayer piezoelectric ceramic actuator to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multilayer piezoelectric ceramic actuator, comprising a ceramic actuator component, the ceramic actuator component is wrapped with a stabilizing component, the ceramic actuator component comprises a plurality of piezoelectric ceramics and a plurality of inner electrodes, the plurality of piezoelectric ceramics are arranged in parallel and spaced apart in multiple layers, an inner electrode is arranged between every two adjacent piezoelectric ceramics, and two vertically arranged outer electrodes are arranged on both sides of the piezoelectric ceramics;

[0007] The stabilizing component includes two No. 1 concave clamp seats and two No. 2 concave clamp seats, one side of each of the two No. 1 concave clamp seats is connected to a No. 2 concave clamp seat, an L-shaped fixing strip is fixedly connected between the two outer corners of the two No. 1 concave clamp seats and the two No. 2 concave clamp seats, docking blocks are fixedly installed on the two side edges of the openings of the two No. 1 concave clamp seats, and docking slots are opened on the two side edges of the openings of the two No. 2 concave clamp seats.

[0008] Preferably, a plurality of the docking plug blocks correspond one-to-one to a plurality of the docking slots, and the docking plug blocks are plugged into the docking slots.

[0009] Preferably, one end of the inner electrode is in contact with one of the outer electrodes, and an insulating layer is provided between the other end of the inner electrode and the other outer electrode.

[0010] Preferably, two adjacent insulating layers along the vertical direction are arranged in a staggered manner.

[0011] Preferably, the four L-shaped fixing strips are fitted with the four vertical edges of the ceramic actuator assembly.

[0012] Compared with the prior art, the beneficial effect of the utility model is that the multilayer piezoelectric ceramic actuator can provide a stable limiting force by setting a stabilizing component, which can ensure that the interface quality between each layer of piezoelectric ceramic sheet and the metal electrode is in a stable state during the sintering process, making the contact between the layers more comprehensive, thereby making the quality of the sintered finished product better. At the same time, the overall stabilizing component will provide a stabilizing force, so that the piezoelectric ceramics, inner electrodes, outer electrodes and insulating layers in the ceramic actuator assembly can fit tightly, thereby avoiding the occurrence of cracks on the edge of the actuator and effectively extending the service life of the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0014] Figure 2 It is a three-dimensional structural schematic diagram of the ceramic actuator assembly of the utility model;

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the stabilizing component of the utility model.

[0016] In the figure: 1. Ceramic actuator assembly; 101. Piezoelectric ceramic; 102. Inner electrode; 103. Outer electrode; 104. Insulating layer; 2. Stabilizing assembly; 201. No. 1 concave clamp seat; 202. No. 2 concave clamp seat; 203. L-shaped fixing strip; 204. Docking block; 205. Docking slot. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The utility model provides a technical solution: comprising a ceramic actuator component 1, wherein the ceramic actuator component 1 is wrapped with a stabilizing component 2, wherein the ceramic actuator component 1 comprises a plurality of piezoelectric ceramics 101 and a plurality of inner electrodes 102, wherein the plurality of piezoelectric ceramics 101 are arranged in parallel and spaced apart in multiple layers, wherein an inner electrode 102 is arranged between every two adjacent piezoelectric ceramics 101, and two vertically arranged outer electrodes 103 are arranged on both sides of the piezoelectric ceramics 101;

[0019] The stabilizing component 2 includes two No. 1 concave clamp seats 201 and two No. 2 concave clamp seats 202, one side of each of the two No. 1 concave clamp seats 201 is connected to a No. 2 concave clamp seat 202, an L-shaped fixing strip 203 is fixedly connected between the two outer corners of the two No. 1 concave clamp seats 201 and the two No. 2 concave clamp seats 202, docking blocks 204 are fixedly installed on both side edges of the openings of the two No. 1 concave clamp seats 201, and docking slots 205 are opened on both side edges of the openings of the two No. 2 concave clamp seats 202.

[0020] In this embodiment, a plurality of the docking plug blocks 204 correspond to a plurality of the docking slots 205 one by one, and the docking plug blocks 204 are plugged into the docking slots 205 .

[0021] At the same time, one end of the inner electrode 102 is in contact with one of the outer electrodes 103, and an insulating layer 104 is provided between the other end and the other outer electrode 103. The two adjacent insulating layers 104 in the vertical direction are arranged alternately. The insulating layer 104 can prevent an inner electrode 102 from contacting two outer electrodes 103 at the same time. At the same time, the insulating layer 104 can compensate for the gap between two adjacent piezoelectric ceramics 101 in the non-overlapping part of the inner electrode 102.

[0022] The four L-shaped reinforcement strips 203 are fitted with the four vertical edges of the corners of the ceramic actuator assembly 1. The four vertical edges of the corners of the ceramic actuator 1 can be reinforced by the L-shaped reinforcement strips 203.

[0023] When in use, the two No. 1 concave clamp seats 201 and the two vertical L-shaped fixing strips 203 can form a half-shaped fixed frame, and the No. 2 concave clamp seat 202 and the two vertical L-shaped fixing strips 203 can form another half-shaped fixed frame. By merging the two half-shaped fixed frames, the ceramic actuator assembly 1 can be wrapped and fixed in the stabilizing assembly 1. The No. 1 concave clamp seat 201 and the No. 2 concave clamp seat 202 of the same height can be quickly aligned and docked through the docking plug block 204 and the docking slot 205. The relative contact surfaces of the No. 1 concave clamp seat 201 and the No. 2 concave clamp seat 202 are bonded with adhesive, so that the No. 1 concave clamp seat 201 and the No. 2 concave clamp seat 202 can be connected. 2, and will be subsequently connected together by sintering the first concave clamp seat 201 and the second concave clamp seat 202. After docking, the overall stabilizing component 2 will provide a stabilizing force, so that the piezoelectric ceramic 101, the inner electrode 102, the outer electrode and the insulating layer 104 in the ceramic actuator component 1 can fit tightly, thereby avoiding cracks on the edge of the actuator and effectively extending the service life of the actuator. At the same time, by setting up the stabilizing component 2, a stable limiting force can be provided, which can ensure that the interface quality between each layer of piezoelectric ceramic 101 and the metal electrode is in a stable state during the sintering process, so that the contact between the layers is more comprehensive.

[0024] To summarize, the multilayer piezoelectric ceramic actuator can provide a stable limiting force by setting a stabilizing component, which can ensure that the interface quality between each layer of piezoelectric ceramic sheet and the metal electrode is in a stable state during the sintering process, making the contact between the layers more comprehensive, thereby improving the quality of the sintered finished product. At the same time, the overall stabilizing component will provide a stabilizing force, so that the piezoelectric ceramics, inner electrodes, outer electrodes and insulating layers in the ceramic actuator assembly can fit tightly together, thereby avoiding cracks on the edge of the actuator and effectively extending the service life of the actuator.

[0025] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0027] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be fixed, connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multilayer piezoelectric ceramic actuator, comprising a ceramic actuator assembly (1), characterized in that The ceramic actuator component (1) is wrapped with a stabilizing component (2), and the ceramic actuator component (1) comprises a plurality of piezoelectric ceramics (101) and a plurality of internal electrodes (102). The plurality of piezoelectric ceramics (101) are arranged in parallel and spaced apart in multiple layers, an internal electrode (102) is arranged between every two adjacent piezoelectric ceramics (101), and two vertically arranged external electrodes (103) are arranged on both sides of the piezoelectric ceramics (101); The stabilizing component (2) comprises two No. 1 concave clamp seats (201) and two No. 2 concave clamp seats (202); one side of each of the two No. 1 concave clamp seats (201) is connected to a No. 2 concave clamp seat (202); an L-shaped fixing strip (203) is fixedly connected between two outer corners of each of the two No. 1 concave clamp seats (201) and the two No. 2 concave clamp seats (202); docking plug blocks (204) are fixedly installed at both side edges of the openings of the two No. 1 concave clamp seats (201); and docking slots (205) are provided at both side edges of the openings of the two No. 2 concave clamp seats (202).

2. A multilayer piezoelectric ceramic actuator according to claim 1, characterized in that: A plurality of the docking plug blocks (204) correspond one-to-one to a plurality of the docking slots (205), and the docking plug blocks (204) are plugged into the docking slots (205).

3. The multilayer piezoelectric ceramic actuator according to claim 1, characterized in that: One end of the inner electrode (102) contacts one of the outer electrodes (103), and an insulating layer (104) is provided between the other end and the other outer electrode (103).

4. The multilayer piezoelectric ceramic actuator according to claim 3, characterized in that: Two insulating layers (104) adjacent to each other in the vertical direction are arranged in a staggered manner.

5. The multilayer piezoelectric ceramic actuator according to claim 1, characterized in that: The four L-shaped fixing strips (203) are fitted to the four vertical edges of the ceramic actuator assembly (1).

Images