CN217392826U - Pre-tightening pressure adjusting device and non-contact piezoelectric injection valve - Google Patents

Abstract

The utility model provides a pretension pressure adjusting device and a non-contact piezoelectric injection valve, which relate to the technical field of injection devices, and comprise an encapsulation bracket, a lever part, a driving part, a piezoelectric actuator and a pretension elastic part; the lever piece is provided with a fulcrum part, a stress part and a force application part, and the fulcrum part is hinged to the packaging support; the driving part is arranged on the packaging support and connected with the piezoelectric actuator, the piezoelectric actuator can be driven to act, and one end of the piezoelectric actuator, which is far away from the driving part, is abutted against the stressed part; one end of the pre-tightening elastic piece is fixed relative to the packaging support, and the other end of the pre-tightening elastic piece is connected with the force application part. The non-contact piezoelectric injection valve comprises a pre-tightening pressure adjusting device. The technical problem that the performance of the piezoelectric actuator is damaged or even damaged due to repeated disassembly and assembly of the piezoelectric actuator through gap gasket adjustment in the prior art is solved, and the technical effects of more convenience, safety, simplicity and high precision in the adjustment process are achieved.

Description

Pre-tightening pressure adjusting device and non-contact piezoelectric injection valve

Technical Field

The utility model belongs to the technical field of injection apparatus's technique and specifically relates to a pretension pressure adjustment device and non-contact piezoelectricity injection valve are related to.

Background

With the rapid development of the electronic industry, the requirement for electronic packaging is higher and higher, and for the high-requirement electronic packaging technology, the non-contact piezoelectric injection valve is more and more widely applied in the electronic packaging field with the advantages of high efficiency, high precision and the like. The non-contact piezoelectric injection valve mainly comprises a valve body, a piezoelectric actuator arranged in the valve body, an amplifier, a flow channel assembly and the like, and the main principle is as follows: the deformation of the piezoelectric actuator after being electrified is amplified by an amplifier through a lever principle and is transferred to a jet collision rod (collision pin) in the flow channel assembly, and the glue solution in the flow channel assembly is jetted out by the high-speed impact nozzle of the jet collision rod.

The piezoelectric actuator is used as a core driving component of the non-contact piezoelectric injection valve, the performance stability and consistency of the piezoelectric actuator directly influence the performance of the non-contact piezoelectric injection valve, and the pre-tightening pressure of the piezoelectric actuator is the largest influence factor of the performance of the piezoelectric actuator, so that the pre-tightening pressure of the piezoelectric actuator needs to be accurately adjusted when the piezoelectric actuator is assembled and debugged.

The existing piezoelectric ceramic pre-tightening pressure adjusting mode mainly comprises the following modes: the adjustment of the pre-tightening pressure is achieved by increasing or decreasing the amount of compression of the compression spring by changing the physical length of one side of the piezoelectric actuator by adding or decreasing a gap spacer(s) between the package support and the upper top block. During adjustment each time, the piezoelectric actuator needs to be disassembled, the gap gasket is installed after being increased or decreased, after the power-on operation is stable for a period of time, the current actual compression amount is measured, whether the current actual compression amount is within a required range or not is judged, multiple times of cyclic adjustment is usually needed, and the pre-tightening pressure adjustment requirement of one piezoelectric actuator can be met. However, the above-described adjustment manner inevitably has the following problems:

with gap shim adjustment, the piezoelectric actuator needs to be repeatedly disassembled and assembled, resulting in the risk of damaging or even destroying the performance of the piezoelectric actuator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pretension pressure adjustment device and non-contact piezoelectricity injection valve to alleviate the adjustment through the clearance gasket that exists among the prior art, need dismantle repeatedly, install piezoelectric actuator, lead to piezoelectric actuator performance to have the technical problem of the impaired risk of damaging even.

In a first aspect, the present invention provides a pretension pressure adjusting device, including: the packaging device comprises a packaging bracket, a lever piece, a driving piece, a piezoelectric actuator and a pre-tightening elastic piece;

the lever piece is provided with a fulcrum part, a stress part and a force application part, and the fulcrum part is hinged to the packaging support;

the driving part is arranged on the packaging support and connected with the piezoelectric actuator, the piezoelectric actuator can be driven to act, and one end, far away from the driving part, of the piezoelectric actuator is abutted to the stressed part;

one end of the pre-tightening elastic piece is fixed relative to the packaging support, and the other end of the pre-tightening elastic piece is connected with the force application part.

Further, the fulcrum part of the lever piece is hinged to the packaging support through a hinge column;

the fulcrum part of the lever piece is in tangential fit with the hinge column through a cylindrical surface.

Furthermore, the driving part is in threaded connection with the mounting hole of the packaging support, and one end of the driving part, which is close to the piezoelectric actuator, can drive the piezoelectric actuator to act.

Furthermore, an upper ejector block is arranged between the output end of the driving piece and the piezoelectric actuator;

the upper top block and the upper support block of the piezoelectric actuator are in tangent fit through an arc surface.

Further, the packaging support is provided with a mounting hole;

the mounting hole is provided with a threaded hole section and a limiting groove section, and the driving piece is in threaded connection with the threaded hole section;

the upper ejector block is limited in the limiting groove section and is in sliding connection with the limiting groove section.

Further, the lower support block of the piezoelectric actuator is in tangent fit with the stressed part of the lever member through an arc surface.

Furthermore, the pre-tightening elastic part adopts a spiral spring, a first end of the spiral spring is fixed relative to the packaging support, and a second end of the spiral spring is abutted against the force application part of the lever part.

Further, the packaging support is provided with a mounting groove;

the spiral spring is positioned in the mounting groove, a first end of the spiral spring is connected to the inner bottom surface of the mounting groove, and a second end of the spiral spring is sleeved on the outer peripheral side of the force application part.

Furthermore, the first end of the spiral spring is sleeved on the support;

the support is limited in the mounting groove and is arranged opposite to the force application part.

The utility model provides a pretension pressure adjustment device has following beneficial effect at least:

the utility model provides a pretension pressure adjusting device, because fulcrum portion articulates in the encapsulation support, driving piece threaded connection is in the encapsulation support, and be connected with piezoelectric actuator, piezoelectric actuator keeps away from the one end and the atress portion butt of driving piece, therefore, when specifically using, revolve wrong driving piece, the driving piece will drive piezoelectric actuator relative encapsulation support and move when rotating, and promote the atress portion action of lever spare, make lever spare rotate around fulcrum portion, meanwhile, the application of force portion of lever spare will press the pretension elastic component and make it compressed, can realize the increase of pretension pressure; conversely, the driving piece is reversely screwed, so that the pre-tightening pressure can be reduced.

Therefore, the pre-tightening pressure adjusting device can adjust the pre-tightening pressure by screwing the driving piece, the piezoelectric actuator does not need to be repeatedly disassembled and assembled, the risk that the piezoelectric actuator is damaged or even damaged in the disassembling and assembling process is avoided, the adjustment is safer, and the reliability is higher.

In a second aspect, the present invention provides a non-contact piezoelectric injector, comprising: the pretension pressure adjusting device of any of the previous embodiments.

The utility model provides a non-contact piezoelectricity injection valve has following beneficial effect at least:

the utility model provides a non-contact piezoelectricity injection valve, including aforementioned pretension pressure adjustment device, from this, technical advantage and effect that this non-contact piezoelectricity injection valve can reach include technical advantage and effect that pretension pressure adjustment device can reach equally, no longer describe here.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pretension pressure adjusting device according to an embodiment of the present invention;

FIG. 2 is a front view of a pretension pressure setting device;

FIG. 3 is a top view of a pretension pressure setting device;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

fig. 5 is a sectional view of fig. 4, not shown, in part.

An icon:

100-packaging a support; 110-mounting holes; 111-a threaded bore section; 112-a limiting groove section; 120-mounting grooves;

200-a lever member; 210-a fulcrum section; 220-a force-bearing portion; 230-a force application portion;

300-a driver;

400-a piezoelectric actuator; 410-upper supporting block; 420-lower branch block;

500-pre-tightening the elastic element;

600-hinge post;

700-top block;

800-support.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 to 5, the present embodiment provides a pre-tightening pressure adjusting apparatus, which includes a package support 100, a lever member 200, a driving member 300, a piezoelectric actuator 400, and a pre-tightening elastic member 500; the lever member 200 has a fulcrum portion 210, a force receiving portion 220 and a force applying portion 230, the fulcrum portion 210 is hinged to the package support 100; the driving member 300 is disposed on the package support 100 and connected to the piezoelectric actuator 400, and one end of the piezoelectric actuator 400 away from the driving member 300 abuts against the force-receiving portion 220; one end of the pre-tightening elastic member 500 is fixed with respect to the package support 100, and the other end is connected to the force application part 230.

The driving member 300 is used to drive the piezoelectric actuator 400 to move relative to the package support 100, and to rotate the lever member 200 around the fulcrum portion 210, so as to adjust the compression degree of the pre-tightening elastic member 500.

Specifically, the driving member 300 drives the piezoelectric actuator 400 to move toward a direction close to or away from the lever member 200, and then the piezoelectric actuator 400 makes the lever member 200 act, and the pre-tightening elastic member 500 is always in a compression state in the whole process, so that the pre-tightening pressure can be adjusted by adjusting the compression degree of the pre-tightening elastic member 500.

When the pretension pressure adjusting device provided by the embodiment is used specifically, the driving member 300 is screwed, the driving member 300 drives the piezoelectric actuator 400 to move relative to the packaging support 100 while rotating, and pushes the force receiving portion 220 of the lever member 200 to act, so that the lever member 200 rotates around the fulcrum portion 210, and meanwhile, the force applying portion 230 of the lever member 200 presses the pretension elastic member 500 to compress the pretension elastic member, so that the pretension pressure can be adjusted; conversely, the pre-tightening pressure can be reduced by reversely screwing the driving element 300.

Briefly, referring to fig. 1, the driving member 300 drives the piezoelectric actuator 400 to move toward the lever member 200, and then the piezoelectric actuator 400 drives the lever member 200 to rotate, so that the pre-tightening elastic member 500 is further compressed; the driving member 300 drives the piezoelectric actuator 400 to move away from the lever member 200, and at this time, the lever member 200 rotates under the restoring force of the pre-tightening elastic member 500, so that the compression degree of the pre-tightening elastic member 500 is reduced.

Therefore, the pre-tightening pressure adjusting device can adjust the pre-tightening pressure by screwing the driving piece 300 without repeatedly disassembling and assembling the piezoelectric actuator 400, so that the risk that the piezoelectric actuator 400 is damaged or even damaged in the disassembling and assembling process is avoided, the adjustment is safer, and the reliability is higher.

In the general technology, through gap gasket adjustment, one adjustment process comprises the steps of testing the current pre-tightening compression amount, calculating the thickness of a gasket needing to be increased, disassembling the piezoelectric actuator 400, placing the gap gasket, installing the piezoelectric actuator 400, confirming that the piezoelectric actuator 400 is in a stable state through electrifying work, measuring the pre-tightening compression amount, and judging whether the requirement is met, wherein about 6-8 minutes is needed, each valve body needs 3-4 times of cyclic adjustment on average, the time is about 18-32 minutes, and the time consumed by the adjustment mode is long. Through the adjustment of the gap spacer, the minimum adjustment amount exists in the gap spacer, and the position of the piezoelectric actuator 400 is changed after each installation due to the assembly and disassembly of the piezoelectric actuator 400, so that the actual adjustment of the compression amount is different from the theory, and the achievable adjustment accuracy needs to be improved.

In the embodiment, the pre-tightening pressure adjusting process is simpler and more convenient, three main time-consuming steps of detaching the piezoelectric actuator 400, placing the gap gasket and installing the piezoelectric actuator 400 are reduced, the time of the step of confirming that the piezoelectric actuator 400 is in a stable state through power-on work is reduced, and the time consumed in the whole adjusting process is obviously reduced; in addition, the pre-tightening pressure adjustment can meet the requirement of a higher precision range, the minimum adjustment amount of the up-down displacement of the adjusting driving piece 300 is smaller than the minimum adjustment amount of the clearance gasket, and the more precise pre-tightening pressure adjustment can be realized. In addition, the pre-tightening pressure adjusting structure is simple, the consistency performance of equipment is favorably improved, the quantity of related parts is adjusted, and the complexity is obviously reduced.

Further, the horizontal distances from the force receiving portion 220 and the force applying portion 230 to the fulcrum portion 210 of the lever member 200 are proportionally set to ensure smooth implementation of the pretension pressure adjusting process.

Illustratively, the proportional range of the horizontal distances from the force receiving portion 220 and the force applying portion 230 to the fulcrum portion 210 of the lever member 200 is (6-8): 1 may be, for example, 6:1, 7:1 or 8: 1.

Referring to fig. 1 or 2, the fulcrum portion 210 of the lever member 200 is hinged to the package holder 100 by a hinge post 600; the fulcrum part 210 of the lever member 200 is in tangential fit with the hinge post 600 through the cylindrical surface, so that the installation of the fulcrum part 210 of the lever member 200 and the packaging bracket 100 can be facilitated, and the fulcrum part 210 of the lever member 200 can rotate more smoothly around the hinge post 600.

Alternatively, the hinge post 600 may be fixed to the package support 100 by means of glue, tape, or the like.

With reference to fig. 1 or fig. 2, an upper pushing block 700 is disposed between the output end of the driving member 300 and the piezoelectric actuator 400; the upper top block 700 and the upper block 410 of the piezoelectric actuator 400 are matched in a tangent mode through an arc surface. Optionally, the cambered surface may be a spherical surface.

Further, referring to fig. 5, the package support 100 is provided with a mounting hole 110; the driving member 300 is screwed into the mounting hole 110, and an end of the driving member 300 close to the piezoelectric actuator 400 can drive the piezoelectric actuator 400 to move.

The mounting hole 110 is provided with a threaded hole section 111 and a limiting groove section 112, and the driving piece 300 is in threaded connection with the threaded hole section 111; the upper top block 700 is limited in the limiting groove section 112 and is connected with the limiting groove section 112 in a sliding manner.

The driving member 300 is threadedly connected to the threaded hole section 111, so that the driving member 300 can move up and down relative to the package support 100 when the driving member 300 is screwed; alternatively, the driver 300 may be a stud. By setting the length of the threaded bore section 111, control of the amount of displacement of the driver 300 up and down can be achieved.

Because the upper top block 700 is limited in the limiting groove section 112 and is in sliding connection with the limiting groove section 112, the upper top block 700 can be limited from shaking along the direction perpendicular to the up-and-down movement while ensuring the up-and-down movement.

Referring to fig. 2 or 4, the lower support block 420 of the piezoelectric actuator 400 is tangentially fitted to the force-receiving portion 220 of the lever member 200 through an arc surface. Alternatively, the curved surface may be a spherical surface.

In one embodiment of the present application, referring to fig. 4 and 5, the biasing elastic member 500 is a coil spring, a first end of the coil spring is fixed to the package holder 100, and a second end of the coil spring abuts against the biasing portion 230 of the lever member 200.

Referring to fig. 5, the packing support 100 is provided with a mounting groove 120; the spiral spring is positioned in the mounting groove 120, the first end of the spiral spring is connected to the inner bottom surface of the mounting groove 120 and can be used for roughly positioning the outer ring of the spiral spring, and the two planes are matched for mounting; the second end of the spiral spring is sleeved on the outer periphery of the force application portion 230, and can be used for roughly positioning the inner ring of the spiral spring, and the two are installed in a plane matching manner.

The inner bottom surface of the mounting groove 120 is the side of the mounting groove 120 facing the force application part 230. Referring to fig. 4, a first end of the spiral spring is sleeved on the support 800; support 800 is spacing in mounting groove 120 to set up with application of force portion 230 is relative, so set up, on the fixed mounting's of the first end of realizing the heliciform spring basis, through spacing support 800 is on left right direction, further realize spacing to the heliciform spring, further improve the installation steadiness of heliciform spring.

The adjusting principle of the pretension pressure adjusting device of the embodiment is as follows: the adjustment of the pre-tightening pressure of the piezoelectric actuator 400 mainly adjusts the compression amount of the pre-tightening elastic member 500, and the driving member 300 can be screwed to displace up and down, so that the up-and-down displacement of the upper top block 700 and the piezoelectric actuator 400 is realized, and because the physical lengths of the upper top block 700 and the piezoelectric actuator 400 are not changed, the up-and-down displacement thereof can drive the lever member 200 to rotate around the fulcrum portion 210, and finally the change of the compression amount of the pre-tightening elastic member 500 is realized, and when the compression amount reaches a required range, the adjustment of the pre-tightening pressure of the piezoelectric actuator 400 is completed.

The present embodiment further provides a non-contact piezoelectric injection valve, where the non-contact piezoelectric injection valve includes the aforementioned pre-tightening pressure adjusting device, and therefore, technical advantages and effects that can be achieved by the non-contact piezoelectric injection valve also include technical advantages and effects that can be achieved by the pre-tightening pressure adjusting device, and are not described herein again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (10)

1. A pretension pressure adjustment device, comprising: the packaging structure comprises a packaging support (100), a lever piece (200), a driving piece (300), a piezoelectric actuator (400) and a pre-tightening elastic piece (500);

the lever member (200) is provided with a fulcrum part (210), a force bearing part (220) and a force application part (230), and the fulcrum part (210) is hinged to the packaging support (100);

the driving part (300) is arranged on the packaging support (100), is connected with the piezoelectric actuator (400) and can drive the piezoelectric actuator (400) to act, and one end, far away from the driving part (300), of the piezoelectric actuator (400) is abutted to the stressed part (220);

one end of the pre-tightening elastic piece (500) is fixed relative to the packaging support (100), and the other end of the pre-tightening elastic piece is connected with the force application part (230).

2. The preloaded pressure adjustment device of claim 1, wherein said fulcrum portion (210) of said lever member (200) is hinged to said package holder (100) by means of a hinge post (600);

the fulcrum part (210) of the lever member (200) is tangentially matched with the hinge column (600) through a cylindrical surface.

3. The pretension pressure adjusting device according to claim 1, wherein the driving member (300) is screwed into the mounting hole (110) of the packaging bracket (100), and one end of the driving member (300) close to the piezoelectric actuator (400) can drive the piezoelectric actuator (400) to move.

4. The pre-tensioning pressure adjusting device according to claim 1, characterized in that an upper ejector block (700) is arranged between the output end of the driving piece (300) and the piezoelectric actuator (400);

the upper top block (700) and the upper support block (410) of the piezoelectric actuator (400) are in tangent fit through an arc surface.

5. The pretension pressure adjusting device according to claim 4, wherein the packing holder (100) is provided with a mounting hole (110);

the mounting hole (110) is provided with a threaded hole section (111) and a limiting groove section (112), and the driving piece (300) is in threaded connection with the threaded hole section (111);

the upper ejector block (700) is limited in the limiting groove section (112) and is in sliding connection with the limiting groove section (112).

6. The pre-tensioning pressure adjusting device according to claim 4, wherein the lower support block (420) of the piezoelectric actuator (400) is in tangential fit with the force receiving part (220) of the lever member (200) through an arc surface.

7. The pre-tensioning pressure adjusting device according to any one of claims 1 to 6, wherein the pre-tensioning elastic member (500) is a helical spring, a first end of the helical spring is fixed relative to the packaging bracket (100), and a second end of the helical spring abuts against the force applying portion (230) of the lever member (200).

8. The pretension pressure adjusting device according to claim 7, wherein the packing holder (100) is provided with a mounting groove (120);

the spiral spring is positioned in the mounting groove (120), a first end of the spiral spring is connected to the inner bottom surface of the mounting groove (120), and a second end of the spiral spring is sleeved on the outer peripheral side of the force application part (230).

9. The pre-tensioning pressure adjusting device according to claim 8, wherein the first end of the helical spring is sleeved on the support (800);

the support (800) is limited in the mounting groove (120) and is arranged opposite to the force application part (230).

10. A non-contact piezoelectric injection valve, comprising: the pretension pressure setting device according to any one of claims 1 to 9.

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