Piezoelectric energy harvester

Abstract

The utility model discloses a piezoelectric energy harvester, which relates to the technical field of piezoelectric energy harvesters, and comprises a suspension cylinder, a limiting baffle ring is fixed on the inner cavity wall of the suspension cylinder, a piezoelectric assembly is placed on the upper side of the limiting baffle ring, a first spring is connected between the middle part of the piezoelectric assembly and the bottom wall of the inner cavity of the suspension cylinder, and a second spring is connected between the middle part of the piezoelectric assembly and the bottom wall of the inner cavity of the suspension cylinder. A barrel cover is arranged at the top of the suspension barrel, and an external thread pressing ring is fixed to the bottom of the barrel cover; and the base is located at the bottom of the suspension cylinder, and a second spring is connected between the base and the suspension cylinder. According to the utility model, the piezoelectric assembly is arranged on the limiting baffle ring in the suspension cylinder, and then the cylinder cover is covered and rotated, so that the external thread pressing ring at the bottom of the cylinder cover is nested in the suspension cylinder in a threaded manner, and the external thread pressing ring extrudes and limits the edge of the piezoelectric assembly, and therefore, the piezoelectric assembly can be stably installed, and the piezoelectric assembly can be simply and conveniently installed; and meanwhile, later disassembly, maintenance or replacement is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to piezoelectric energy harvester technical field, concretely relates to a piezoelectric energy harvester. BACKGROUND

[0002] With the rapid development of new energy and the enhancement of environmental protection consciousness, piezoelectric energy harvesting technology application field is gradually expanding. Piezoelectric energy harvester is a kind of mechanical energy conversion device, can be used for energy collection and conversion in various occasions. Therefore, piezoelectric energy harvesting technology has wide application prospect in vibration energy collection, intelligent structure monitoring, wireless sensor and so on.

[0003] Through the retrieval, CN202323071555.9 discloses a spring limiting amplitude type piezoelectric energy harvester, including shell, suspension plate suspended in the shell, spring vertically arranged on both sides of suspension plate respectively, adjusting member for adjusting spring elasticity arranged on both sides of shell respectively, at least one cantilever beam piezoelectric vibrator connected with suspension plate, so that when vibration occurs in the surrounding environment, the upper spring and the lower spring drive the upper cylindrical block and the lower cylindrical block to vibrate, at this time, the square plate also vibrates, effectively drives the cantilever beam piezoelectric vibrator to bend, the energy harvester can adjust the deformation degree of the cantilever beam piezoelectric vibrator according to the vibration size of the surrounding vibration source, can effectively improve the energy harvesting efficiency, and increase the reliability of the energy harvester, avoid the damage of the cantilever beam piezoelectric vibrator due to excessive deformation;

[0004] In the above patent, the cantilever beam piezoelectric vibrator is connected with the shell and the suspension plate respectively, so that the maintenance or replacement of the cantilever beam piezoelectric vibrator is extremely inconvenient, and the upper spring and the lower spring are connected with the suspension plate, part of the energy generated by the vibration of the upper spring and the lower spring is offset, so that the vibration time is short, and the effect is affected. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a piezoelectric energy harvester to solve the problems in the above background.

[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a piezoelectric energy harvester, comprising:

[0007] The inner cavity wall of the suspension cylinder is fixed with a limiting baffle ring, the upper side of the limiting baffle ring is placed with a piezoelectric assembly, the middle part of the piezoelectric assembly is connected with the bottom wall of the inner cavity of the suspension cylinder with a first spring, the top of the suspension cylinder is provided with a cylinder cover, and the bottom of the cylinder cover is fixed with an external thread pressing ring.

[0008] The bottom of the base is located in the suspension cylinder, and the second spring is connected between the base and the suspension cylinder.

[0009] Preferably, the piezoelectric assembly comprises a suspension disc and a support ring, the support ring is sleeved outside the suspension disc, a plurality of base plates are connected to the side wall of the suspension disc, piezoelectric ceramic sheets are bonded on the base plates, and the ends of the piezoelectric ceramic sheets away from the base plates are connected to the inner wall of the support ring.

[0010] Preferably, the support ring is arranged on the limiting ring, and the bottom of the suspension disc abuts against the top of the first spring.

[0011] Preferably, the upper wall of the limiting ring in the suspension cylinder is provided with an internal thread, and the external thread pressing ring is threadedly nested in the suspension cylinder, so that the connection between the cylinder cover and the suspension cylinder is simple, and the cylinder cover and the suspension cylinder are convenient to disassemble, and the piezoelectric assembly is limited by the external thread pressing ring extruding the support ring, so that the piezoelectric assembly is stably installed.

[0012] Preferably, the top of the cylinder cover is fixed with a torsion block, so that the force is conveniently applied on the cylinder cover, and the installation or disassembly between the cylinder cover and the suspension cylinder is facilitated.

[0013] Preferably, the base plate is made of stainless steel material, has large structural strength, is not easy to be damaged, and has good elasticity.

[0014] Preferably, the upper side of the base is fixed with a first limiting sleeve ring, the lower side of the suspension cylinder is fixed with a second limiting sleeve ring, the upper end of the second spring is nested in the second limiting sleeve ring, and the lower end of the second spring is nested in the first limiting sleeve ring.

[0015] In the above technical solution, the technical effects and advantages of the utility model are provided.

[0016] 1. The piezoelectric assembly is arranged on the limiting ring in the suspension cylinder, then the cylinder cover is covered and rotated, the external thread pressing ring of the bottom of the cylinder cover is threadedly nested in the suspension cylinder, the external thread pressing ring extrudes and limits the edge of the piezoelectric assembly, the piezoelectric assembly is stably installed, the installation of the piezoelectric assembly is simple and convenient, and the piezoelectric assembly is convenient to disassemble, maintain or replace in the later period.

[0017] 2. The second spring is arranged between the suspension cylinder and the base, the first spring is arranged between the suspension disc of the piezoelectric assembly and the bottom of the inner cavity of the suspension cylinder, when vibration is received, the second spring swings for a long time, so as to drive the suspension cylinder to vibrate for a long time, the first spring in the suspension cylinder is deformed for a long time, the vibration duration of the piezoelectric assembly is long, and the effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0019] Figure 1 It is a perspective view of the present application;

[0020] Figure 2 It is a schematic view of the overall structure of the present application;

[0021] Figure 3 It is another angle schematic view of the present application;

[0022] Figure 4 It is a schematic view of the piezoelectric assembly structure of the present application;

[0023] Figure 5 It is a schematic view of the cylinder cover structure of the present application;

[0024] Figure 6 It is a perspective view of the suspension cylinder of the present application.

[0025] Explanation of reference signs:

[0026] 1, suspension cylinder; 2, limiting stop ring; 3, piezoelectric assembly; 4, first spring; 5, cylinder cover; 6, base; 7, second spring; 8, suspension disc; 9, supporting ring; 10, base plate; 11, piezoelectric ceramic sheet; 12, external thread pressing ring; 13, torsion block; 14, first limiting sleeve ring; 15, second limiting sleeve ring. DETAILED DESCRIPTION

[0027] In order to make those skilled in the art better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the drawings.

[0028] The present application provides a piezoelectric energy harvester as shown in Figures 1 to 6 The piezoelectric energy harvester comprises:

[0029] The suspension cylinder 1 has a limiting stop ring 2 fixed on the inner cavity wall, and the piezoelectric assembly 3 is placed on the upper side of the limiting stop ring 2. The middle part of the piezoelectric assembly 3 is connected with the bottom wall of the inner cavity of the suspension cylinder 1 through the first spring 4. The top of the suspension cylinder 1 is provided with the cylinder cover 5, and the bottom of the cylinder cover 5 is fixed with the external thread pressing ring 12.

[0030] The base 6 is located at the bottom of the suspension cylinder 1, and the second spring 7 is connected between the base 6 and the suspension cylinder 1.

[0031] The piezoelectric assembly 3 comprises a suspension disc 8 and a supporting ring 9 sleeved outside the suspension disc 8, a plurality of base plates 10 are connected to the side wall of the suspension disc 8, piezoelectric ceramic sheets 11 are bonded on the base plates 10, and the ends, away from the base plates 10, of the piezoelectric ceramic sheets 11 are connected to the inner wall of the supporting ring 9.

[0032] The supporting ring 9 is arranged on the limiting ring 2, and the bottom of the suspension disc 8 abuts against the top of the first spring 4.

[0033] The upper wall of the suspension cylinder 1, which is located at the limiting ring 2, is internally threaded, and the outer threaded pressing ring 12 is threadedly nested in the suspension cylinder 1, so that the connection between the cylinder cover 5 and the suspension cylinder 1 is simple, and the cylinder cover 5 and the suspension cylinder 1 are convenient to disassemble, and the outer threaded pressing ring 12 extrudes the supporting ring 9, thereby limiting the piezoelectric assembly 3 and making the piezoelectric assembly 3 stable in installation.

[0034] The top of the cylinder cover 5 is fixed with a torsion block 13, so that the force is conveniently applied on the cylinder cover 5, thereby facilitating the installation or disassembly between the cylinder cover 5 and the suspension cylinder 1.

[0035] The base plate 10 is made of stainless steel material, has large structural strength, is not easy to be damaged, and has good elasticity.

[0036] The upper middle part of the base 6 is fixed with a first limiting sleeve ring 14, the lower middle part of the suspension cylinder 1 is fixed with a second limiting sleeve ring 15, the upper end of the second spring 7 is nested in the second limiting sleeve ring 15, and the lower end of the second spring 7 is nested in the first limiting sleeve ring 14.

[0037] In the utility model, when the piezoelectric assembly 3 is installed, the cylinder cover 5 is taken off from the suspension cylinder 1, then the piezoelectric assembly 3 is arranged in the suspension cylinder 1, the bottom of the supporting ring 9 on the piezoelectric assembly 3 abuts against the upper side of the limiting ring 2 in the suspension cylinder 1, then the outer threaded pressing ring 12 at the bottom of the cylinder cover 5 is threadedly nested in the suspension cylinder 1, and the outer threaded pressing ring 12 extrudes the edge of the piezoelectric assembly 3, so that the piezoelectric assembly 3 is stably installed, the installation of the piezoelectric assembly 3 is simple and convenient, and the piezoelectric assembly 3 is convenient to disassemble, maintain or replace in the later period, the second spring 7 is arranged between the suspension cylinder 1 and the base 6, and when the second spring 7 is vibrated for a long time, the suspension cylinder 1 is vibrated for a long time, the first spring 4 in the suspension cylinder 1 is stressed to continuously and repeatedly deform, the vibration is transmitted to the suspension disc 8 on the piezoelectric assembly 3, the vibration is transmitted to the base plate 10 by the suspension disc 8, the base plate 10 is deformed to extrude the piezoelectric ceramic sheet 11, the piezoelectric assembly 3 is vibrated for a long time, and the deformed energy is converted into electric energy by the positive piezoelectric effect of the piezoelectric ceramic sheet 11.

[0038] The above has only described certain exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature, and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A piezoelectric energy harvester, characterized by, Include: The inner cavity wall of the suspension cylinder (1) is fixed with a limiting ring (2), the upper side of the limiting ring (2) is placed with a piezoelectric component (3), the middle part of the piezoelectric component (3) is connected with the bottom wall of the inner cavity of the suspension cylinder (1), and the top of the suspension cylinder (1) is provided with a cylinder cover (5), the bottom of the cylinder cover (5) is fixed with an outer thread pressing ring (12); The base (6) is located at the bottom of the suspension cylinder (1), and the second spring (7) is connected between the base (6) and the suspension cylinder (1).

2. A piezoelectric power harvester according to claim 1, wherein: The piezoelectric component (3) includes a suspension disc (8) and a supporting ring (9), the supporting ring (9) is sleeved on the outside of the suspension disc (8), the side wall of the suspension disc (8) is connected with a plurality of substrates (10), the piezoelectric ceramic sheet (11) is bonded on the substrate (10), and the end away from the substrate (10) of the piezoelectric ceramic sheet (11) is connected with the inner wall of the supporting ring (9).

3. A piezoelectric power harvester according to claim 2, wherein: The supporting ring (9) is placed on the limiting ring (2), and the bottom of the suspension disc (8) abuts against the top of the first spring (4).

4. The piezoelectric power harvester of claim 1, wherein: The upper wall of the limiting ring (2) in the suspension cylinder (1) is provided with an inner thread, and the outer thread pressing ring (12) is threadedly nested in the suspension cylinder (1).

5. A piezoelectric power harvester according to claim 4, wherein: The top of the cylinder cover (5) is fixed with a torsion block (13).

6. A piezoelectric power harvester according to claim 2, wherein: The substrate (10) is made of stainless steel material.

7. The piezoelectric power harvester of claim 1, wherein: The upper side of the base (6) is fixed with a first limiting sleeve ring (14), the lower side of the suspension cylinder (1) is fixed with a second limiting sleeve ring (15), the upper end of the second spring (7) is nested in the second limiting sleeve ring (15), and the lower end of the second spring (7) is nested in the first limiting sleeve ring (14).

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