CN219064735U

CN219064735U - Limiting assembly for precompression of piezoelectric sensor

Info

Publication number: CN219064735U
Application number: CN202223492146.1U
Authority: CN
Inventors: 刘文田; 马德才; 王一丁
Original assignee: Suzhou Bonnput Measurement And Control Technology Co ltd
Current assignee: Suzhou Bonnput Measurement And Control Technology Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-23
Anticipated expiration: 2032-12-27

Abstract

The utility model relates to a limiting component for precompression of a piezoelectric sensor, which comprises a shell, wherein a quartz wafer is arranged on the inner wall of the shell, an upper cover attached to the quartz wafer is arranged at the top end of the shell, a carrying box supported by an elastic component is arranged on the upper surface of the upper cover, a carrying cavity is formed in the top surface of the carrying box, the carrying box is hemispherical, a lower pressing block is fixedly arranged on the bottom surface of the carrying box, and the lower pressing block is cylindrical. Through setting up the spherical year thing box that is located the upper cover top surface, can make the article that pushes down put into the year thing chamber of year thing box top surface directly to carry the thing chamber along carrying the thing box form and offer, can have irregular appearance chamber, the thing that pushes down of adaptable different shapes has limiting displacement to being convenient for simultaneously pushing down the thing.

Description

Limiting assembly for precompression of piezoelectric sensor

Technical Field

The utility model relates to the technical field of piezoelectric sensors, in particular to a limiting assembly for precompression of a piezoelectric sensor.

Background

Piezoelectric sensors are sensors that utilize the piezoelectric effect that occurs after certain dielectrics are subjected to a force. The piezoelectric effect is a phenomenon in which when some dielectrics are deformed (including bending and stretching deformation) by an external force in a certain direction, electric charges are generated on the surfaces of the dielectrics due to polarization of the internal electric charges. Piezoelectric materials can be classified into piezoelectric single crystal, piezoelectric polycrystalline, and organic piezoelectric materials. The most used of piezoelectric sensors are piezoelectric ceramics belonging to various types of piezoelectric polycrystal and quartz crystals in piezoelectric single crystal. Other piezoelectric single crystals include lithium niobate, lithium tantalate, lithium gallate, bismuth germanate, and the like, which are suitable for use in high temperature radiation environments.

The existing piezoelectric sensor consists of an upper cover, a quartz wafer, an electrode and an insulating sleeve, wherein the upper cover is pressed under the action of force in general, then the pressing force of the upper cover is transmitted to the quartz wafer, and the quartz wafer generates charges at the moment, so that the general use mode is very simple and convenient, the upper cover is pressed by objects with different forces in the experimental process to obtain different charge data, but the volume specifications of the pressed objects used for the experiment are different, the dynamic situation when the piezoelectric sensor is placed on the upper cover is influenced, the situation that the weight cannot be pressed on the surface of the upper cover completely easily occurs, and the pre-compression data in the experimental process is wrong, so that the limiting component for pre-compression of the piezoelectric sensor is provided.

Disclosure of Invention

Aiming at the problems, the utility model provides the limiting assembly for the precompression of the piezoelectric sensor, which has the effect of being convenient for limiting and bearing the pressed object, and improves the convenience of precompression experiments.

The technical scheme of the utility model is as follows:

the utility model provides a piezoelectric sensor precompaction is with spacing subassembly, includes the casing, the inner wall of casing is equipped with quartz wafer, the top of casing is equipped with the upper cover that laminates with quartz wafer, the upper surface of upper cover is equipped with the year thing box that elastic component supported, carry the top surface of thing box to have seted up and have carried the thing chamber, and carry the thing box to be hemisphere, the bottom surface fixed mounting who carries the thing box has the briquetting down, and the briquetting is cylindric down.

In a further technical scheme, two limiting openings are formed in the top opening of the carrying box, and the limiting openings are flat openings.

In further technical scheme, the elastic component is including fixing four installation blocks at upper cover upper surface, the top surface fixed mounting of installation block has compression spring, compression spring's top surface fixed mounting has the supporting shoe, the top surface fixed mounting of supporting shoe has first connecting bolt, the top fixed mounting of first connecting bolt has the second connecting bolt, and the second connecting bolt is perpendicular form with first connecting bolt, the one end that the first connecting bolt was kept away from to the second connecting bolt is fixed in the eccentric department in the bottom surface of carrying the thing box.

In a further technical scheme, a top column is fixedly arranged at the center of the bottom surface of the supporting block, a shuttle hole is formed in the center of the upper surface of the mounting block, and the bottom end of the top column penetrates through the shuttle hole and extends to the upper surface of the upper cover.

In a further technical scheme, the carrying box, the lower pressing block, the mounting block, the compression spring, the supporting block and the jacking column are all included in the self weight of the upper cover.

The beneficial effects of the utility model are as follows:

1. by arranging the spherical object carrying box on the top surface of the upper cover, the pressed objects can be directly put into the object carrying cavity on the top surface of the object carrying box, the object carrying cavity is formed along the shape of the object carrying box, the irregular accommodating cavity can be formed, the pressed objects with different shapes can be adapted, and meanwhile, the limiting effect on the pressed objects is realized;

2. through setting up the spacing mouth of two flat mouths, can make the year thing box have the effect that can put the regular shape and push down the thing, avoid the great circumstances that carries the thing chamber of object to put down to take place.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an assembled configuration of an embodiment of the present utility model;

FIG. 3 is a schematic side sectional view of an embodiment of the present utility model;

FIG. 4 is a schematic diagram of the assembled structure of the top post and shuttle hole according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a housing; 2. a quartz wafer; 3. an upper cover; 4. a carrying box; 5. a carrying cavity; 6. a limit opening; 7. pressing the block; 8. a mounting block; 9. a compression spring; 10. a support block; 11. a first connecting bolt; 12. a second connecting bolt; 13. a top column; 14. shuttle wells.

Detailed Description

Embodiments of the present utility model are further described below with reference to the accompanying drawings.

Examples:

as shown in fig. 1-4, the limiting component for pre-pressing of the piezoelectric sensor comprises a shell 1, a quartz wafer 2 is arranged on the inner wall of the shell 1, an upper cover 3 attached to the quartz wafer 2 is arranged at the top end of the shell 1, four opposite mounting blocks 8 are fixedly arranged on the upper surface of the upper cover 3, a compression spring 9 is fixedly arranged on the top surface of the mounting block 8, a supporting block 10 is fixedly arranged on the top surface of the compression spring 9, a first connecting bolt 11 is fixedly arranged on the top surface of the supporting block 10, a second connecting bolt 12 is vertical to the first connecting bolt 11, a carrier box 4 is arranged between the four supporting blocks 10, one end, far away from the first connecting bolt 11, of the second connecting bolt 12 is fixed at the eccentric position of the bottom surface of the carrier box 4, a carrier cavity 5 is formed in the top surface of the carrier box 4, the carrier box 4 is hemispherical, a lower pressing block 7 is fixedly arranged on the bottom surface of the carrier box 4, a cylindrical pressing block 7 is fixedly arranged on the bottom surface center of the supporting block 10, a top post 13 is fixedly arranged on the bottom surface center of the supporting block 10, a top surface center of the mounting block 8 is provided with a top post 13, a top pressing block 13 extends out of the top surface of the carrier box 3, and the top surface of the carrier box 3 extends into the top cap 13, and the top surface of the carrier box 13 extends through the top 13, and comprises a top pressing block 13, and extends into the top pressing block 13.

The working principle of the technical scheme is as follows:

through setting up the ball-type year thing box 4 that is located upper cover 3 top surface and passes through supporting shoe 10 and first connecting bolt 11 that have compression spring 9, the ball-type year thing box 4 that second connecting bolt 12 supported, can make the article that pushes down put into the year thing chamber 5 of year thing box 4 top surface directly, the in-process pushes down the thing and can slowly push down ballast box 4 by self weight, then let the briquetting 7 of year thing box 4 bottom surface push down upper cover 3, the in-process avoids directly falling to press down the surface of upper cover 3 and causes the damage of heavy creation, simultaneously four supporting shoe 10 bottom surface fixed mounting's jack-prop 13 can penetrate into shuttle hole 14 and push up the upper surface of upper cover 3, stability when improving year thing box 4 use, and carry thing chamber 5 to offer along year thing box 4 type, can have the irregularly and hold the chamber, adaptable different type of pushing down thing, simultaneously have the spacing effect to the thing of being convenient for pushing down.

When the device is used, a pressing object is placed into the inner wall of the object carrying cavity 5, the pressing object can enable the object carrying box 4 to slowly descend through the compression spring 9 in the moment of placement, the compression spring 9 deforms in the process, the weight of the pressing object is required to be larger than the supporting elasticity of the compression spring 9, the rebound state of the compression spring 9 can be avoided, the experimental effect is influenced, the object carrying box 4 is then submerged until the bottom surface of the pressing block 7 is in contact with the surface of the upper cover 3, the top column 13 can pass through the shuttle hole 14 and the pressing block 7 to abut against the upper cover 3 together along with the pressing of the object carrying box 4, the upper cover 3 is conveyed by the whole weight of the pressing object inside the object carrying box 4 after the pressing object is stable, and then the upper cover 3 can convey the force sense to the quartz wafer 2 to generate electric charge.

In another embodiment, as shown in fig. 1, two limiting openings 6 are formed at the top opening of the carrying case 4, and the limiting openings 6 are flat.

When in use, the downward pressing object which is not put into the inner wall of the object carrying cavity 5 is directly erected on the notch surfaces of the two limiting openings 6.

The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. The utility model provides a limit assembly for piezoelectric sensor precompression, includes casing (1), the inner wall of casing (1) is equipped with quartz wafer (2), the top of casing (1) is equipped with upper cover (3) with quartz wafer (2) laminating, its characterized in that: the upper surface of upper cover (3) is equipped with the year thing box (4) that elastic component supported, carry thing chamber (5) have been seted up to the top surface of year thing box (4), and carry thing box (4) to be hemisphere, the bottom surface fixed mounting of year thing box (4) has briquetting (7) down, and briquetting (7) are cylindricly down.

2. The piezoelectric sensor pre-compression limit assembly of claim 1, wherein: two limiting openings (6) are formed in the top opening of the carrying box (4), and the limiting openings (6) are flat openings.

3. The piezoelectric sensor pre-compression limit assembly of claim 1, wherein: the elastic component is including fixing four installation pieces (8) at upper cover (3) upper surface, the top surface fixed mounting of installation piece (8) has compression spring (9), the top surface fixed mounting of compression spring (9) has supporting shoe (10), the top surface fixed mounting of supporting shoe (10) has first connecting bolt (11), the top fixed mounting of first connecting bolt (11) has second connecting bolt (12), and second connecting bolt (12) are perpendicular form with first connecting bolt (11), the one end that first connecting bolt (11) was kept away from to second connecting bolt (12) is fixed in the bottom surface eccentric part of carrying box (4).

4. A piezoelectric transducer pre-compression limit assembly as defined in claim 3, wherein: the bottom surface center department fixed mounting of supporting shoe (10) has spliced pole (13), shuttle hole (14) have been seted up to the upper surface center department of installation piece (8), shuttle hole (14) are run through to the bottom of spliced pole (13) extend to upper surface of upper cover (3).

5. The piezoelectric sensor pre-compression limit assembly of claim 1, wherein: the carrying box (4), the lower pressing block (7), the mounting block (8), the compression spring (9), the supporting block (10) and the jacking column (13) are all included in the self weight of the upper cover (3).