CN213825645U

CN213825645U - Piezoelectric injection valve

Info

Publication number: CN213825645U
Application number: CN202022698778.8U
Authority: CN
Inventors: 陈晓峰; 陶军军
Original assignee: Suzhou Teruite Robot Co Ltd
Current assignee: Suzhou Zhuozhao Dispensing Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-07-30
Anticipated expiration: 2030-11-20

Abstract

The utility model discloses a piezoelectric type injection valve, including the valve body, depression bar, swinging arms, firing pin and the glue feeding mechanism that have the holding chamber, the lower surface of the left end of swinging arms has a second recess that supplies the lower sand grip to imbed, is provided with a supporting spring between the lower surface of the middle part of the swinging arms and the bottom of the holding chamber, the upper surface of swinging arms has a location sand grip near one side of its left end, the lower surface of the right end of swinging arms is connected with the firing pin; the lower surface of depression bar has a first arc recess near its left end one side, piezoceramics stack cylinder is located between depression bar, the swinging arms and is close to left end one side, connects through the second ball that is located the first arc recess of depression bar and the second arc recess of piezoceramics stack cylinder between this piezoceramics stack cylinder up end and the depression bar. The utility model discloses a transfer the linkage setting of structure between subassembly and depression bar, the swinging arms soon, can realize the accurate regulation of colliding the needle position and do not rely on people's experience.

Description

Piezoelectric injection valve

Technical Field

The utility model relates to an equipment field is glued to the point, especially relates to a piezoelectric type injection valve.

Background

In the existing glue dispenser, a high-speed injection valve is often adopted, and a cylinder in the high-speed injection valve is controlled by a high-speed electromagnetic valve so that a firing pin injects fluid out of a nozzle under the action of a spring, thereby completing the glue dispensing working process. In the prior art, on one hand, a firing pin at the lower end of the air cylinder is long in stroke, easy to deform during high-speed up-and-down motion, poor in stability, low in verticality, capable of influencing the injection effect, convenient to use, weak in power of the air cylinder, incapable of meeting the working environment at high frequency and low in injection efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a piezoelectric type injection valve, this piezoelectric type injection valve can realize the accurate adjustment of colliding the needle position and do not rely on people's experience through adjusting the linkage setting of structure between subassembly and depression bar, the swinging arms soon.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a piezoelectric type injection valve comprises a valve body with an accommodating cavity, a pressure lever, a swinging lever, a firing pin and a glue feeding mechanism, wherein the glue feeding mechanism is arranged on the lower end surface of the valve body;

the rotary adjusting component is mounted at the upper part of the valve body, a hanging rack is arranged in the accommodating cavity of the valve body, a first groove and a lower convex strip are respectively arranged on the upper surface and the lower surface of the accommodating cavity of the valve body, an upper convex strip is arranged on the upper surface of the left end of the compression bar, and a first spring is arranged between the lower surface of the right end of the compression bar and the hanging rack;

the lower end of the rotary adjusting assembly is in contact with the upper surface of the right end of the pressing rod, and when the lower end of the rotary adjusting assembly moves up and down, the upper convex strip of the pressing rod can rotate around the first groove in the accommodating cavity;

the lower surface of the left end of the swinging rod is provided with a second groove for the lower convex strip to be embedded in, a supporting spring is arranged between the lower surface of the middle part of the swinging rod and the bottom of the accommodating cavity, one side of the upper surface of the swinging rod, which is close to the left end of the swinging rod, is provided with a positioning convex strip, and the lower surface of the right end of the swinging rod is connected with the firing pin;

the lower surface of the pressure rod is provided with a first arc-shaped groove close to the left end of the pressure rod, the piezoelectric ceramic stack column is positioned between the pressure rod and the oscillating rod and close to one side of the left end, the upper end surface of the piezoelectric ceramic stack column is connected with the pressure rod through a second ball positioned in the first arc-shaped groove of the pressure rod and a second arc-shaped groove of the piezoelectric ceramic stack column, and the groove on the lower end surface of the piezoelectric ceramic stack column is used for embedding and rotatably connecting a positioning convex strip of the oscillating rod;

the lower end of the firing pin corresponds to the impact surface of the nozzle, and a second spring is arranged between the upper end surface of the firing pin and the guide blocking body.

The further improved scheme in the technical scheme is as follows:

1. in the above scheme, the cross-sectional shape of the first arc-shaped groove is semicircular.

2. In the above scheme, the stiffness coefficient of the support spring is greater than the stiffness coefficient of the second spring.

3. In the above scheme, the supporting spring is sleeved on the convex pin column of the swinging rod.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

1. the utility model discloses piezoelectric type injection valve, it sets up through the linkage of transferring structure between subassembly and depression bar, the swinging arms soon, can realize the accurate adjustment of striker position and do not rely on people's experience to make the clearance between striker and the nozzle remain unanimous all the time, and then improve the precision and the uniformity of gluing.

2. The utility model discloses piezoelectric type injection valve, its piezoceramics stack cylinder is located between depression bar, swinging arms and is close to left end one side, the recess of terminal surface supplies the location sand grip embedding of swinging arms and rotatably connects under the piezoceramics stack cylinder, and through the power on and power off of piezoceramics stack cylinder, the drive firing pin strikes the nozzle repeatedly, pushes out the colloid in the glue storage chamber, realizes quick, high accuracy point is glued; furthermore, the second ball that passes through the first arc recess that is located the depression bar and the second arc recess of piezoceramics stack cylinder between this piezoceramics stack cylinder up end and the depression bar is connected for it has the stable movement track of high straightness that hangs down, thereby promotes injection efficiency and stability and life by a wide margin.

Drawings

FIG. 1 is a schematic structural diagram of a piezoelectric injection valve according to the present invention;

FIG. 2 is a longitudinal cross-sectional view of the piezoelectric type injection valve of the present invention;

fig. 3 is a partial cross-sectional view of a piezoelectric type injection valve according to the present invention;

fig. 4 is a partial sectional view of the piezoelectric type injection valve of the present invention.

In the above drawings: 1. an accommodating cavity; 2. a valve body; 3. a pressure lever; 301. a first arc-shaped groove; 4. a swing lever; 401. a convex pin column; 402. positioning the convex strip; 5. a striker; 6. a glue feeding mechanism; 601. a glue storage cavity; 7. a piezoelectric ceramic stack column; 701. a groove; 702. a second arc-shaped groove; 8. a rotary adjusting component; 9. a hanger; 10. a first groove; 11. a lower convex strip; 12. upward convex strips; 13. a first spring; 14. a second groove; 15. a support spring; 16. a guiding plug body; 161. a through hole; 17. a nozzle; 171. an impact surface; 18. a second spring; 24. a second round ball.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; 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 meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

Example 1: a piezoelectric type injection valve comprises a valve body 2 with a containing cavity 1, a pressure lever 3, a swinging rod 4, a firing pin 5 and a glue feeding mechanism 6, wherein the glue feeding mechanism 6 is arranged on the lower end face of the valve body 2, and a piezoelectric ceramic stack column 7 is arranged in the containing cavity 1 of the valve body 2;

a rotary adjusting assembly 8 is mounted at the upper part of the valve body 2, a hanging frame 9 is arranged in the accommodating cavity 1 of the valve body 2, a first groove 10 and a lower convex strip 11 are respectively arranged on the upper surface and the lower surface of the accommodating cavity 1 of the valve body 2, an upper convex strip 12 is arranged on the upper surface of the left end of the pressure lever 3, and a first spring 13 is arranged between the lower surface of the right end of the pressure lever 3 and the hanging frame 9;

the lower end of the rotary adjusting component 8 is in contact with the upper surface of the right end of the pressure lever 3, and when the lower end of the rotary adjusting component 8 moves up and down, the upper convex strip 12 of the pressure lever 3 can rotate around the first groove 10 on the accommodating cavity 1;

the lower surface of the left end of the swing rod 4 is provided with a second groove 14 for the lower convex strip 11 to be embedded in, a supporting spring 15 is arranged between the lower surface of the middle part of the swing rod 4 and the bottom of the accommodating cavity 1, one side of the upper surface of the swing rod 4 close to the left end thereof is provided with a positioning convex strip 402, and the lower surface of the right end of the swing rod 4 is connected with the firing pin 5;

a first arc-shaped groove 301 is formed in one side, close to the left end, of the lower surface of the pressing rod 3, the piezoelectric ceramic stack column 7 is located between the pressing rod 3 and the oscillating rod 4 and close to one side of the left end, the upper end face of the piezoelectric ceramic stack column 7 is connected with the pressing rod 3 through a second ball 24 located in the first arc-shaped groove 301 of the pressing rod 3 and a second arc-shaped groove 702 of the piezoelectric ceramic stack column 7, and a groove 701 in the lower end face of the piezoelectric ceramic stack column 7 is used for a positioning convex strip 402 of the oscillating rod 4 to be embedded and rotatably connected;

a guide blocking body 16 is installed in the opening at the lower end of the valve body 2, the striker 5 is embedded in the through hole 161 of the guide blocking body 16, the striker 5 extends into the glue storage chamber 601 of the glue feeding mechanism 6, the lower end of the striker 5 corresponds to the impact surface 171 of the nozzle 17, and a second spring 18 is arranged between the upper end surface of the striker 5 and the guide blocking body 16.

The cross section of the first arc-shaped groove 301 is semicircular; the support spring 15 is fitted to the boss pin 401 of the swing lever 4.

Example 2: a piezoelectric type injection valve comprises a valve body 2 with a containing cavity 1, a pressure lever 3, a swinging rod 4, a firing pin 5 and a glue feeding mechanism 6, wherein the glue feeding mechanism 6 is arranged on the lower end face of the valve body 2, and a piezoelectric ceramic stack column 7 is arranged in the containing cavity 1 of the valve body 2;

The coefficient of stiffness of the support spring 15 is greater than the coefficient of stiffness of the second spring 18.

Through the linkage arrangement of the structures among the rotary adjusting assembly, the pressure rod and the swinging rod, the precise adjustment of the position of the striker can be realized without depending on the experience of people, so that the gap between the striker and the nozzle is always kept consistent, and the precision and consistency of dispensing are improved;

in addition, the firing pin is driven to repeatedly impact the nozzle by power on and power off of the piezoelectric ceramic stack cylinder, so that the colloid in the colloid storage cavity is pushed out, and quick and high-precision dispensing is realized; furthermore, the second ball that passes through the first arc recess that is located the depression bar and the second arc recess of piezoceramics stack cylinder between this piezoceramics stack cylinder up end and the depression bar is connected for it has the stable movement track of high straightness that hangs down, thereby promotes injection efficiency and stability and life by a wide margin.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A piezoelectric injection valve, characterized by: the valve comprises a valve body (2) with an accommodating cavity (1), a pressure lever (3), a swinging lever (4), a firing pin (5) and a glue feeding mechanism (6), wherein the glue feeding mechanism (6) is arranged on the lower end face of the valve body (2), and a piezoelectric ceramic stack column (7) is arranged in the accommodating cavity (1) of the valve body (2);

a rotary adjusting assembly (8) is mounted at the upper part of the valve body (2), a hanging rack (9) is arranged in the accommodating cavity (1) of the valve body (2), a first groove (10) and a lower convex strip (11) are respectively arranged on the upper surface and the lower surface of the accommodating cavity (1) of the valve body (2), an upper convex strip (12) is arranged on the upper surface of the left end of the pressure lever (3), and a first spring (13) is arranged between the lower surface of the right end of the pressure lever (3) and the hanging rack (9);

the lower end of the rotary adjusting component (8) is in contact with the upper surface of the right end of the pressing rod (3), and when the lower end of the rotary adjusting component (8) moves up and down, an upper convex strip (12) of the pressing rod (3) can rotate around a first groove (10) in the accommodating cavity (1);

the lower surface of the left end of the swing rod (4) is provided with a second groove (14) for the lower convex strip (11) to be embedded in, a supporting spring (15) is arranged between the lower surface of the middle part of the swing rod (4) and the bottom of the accommodating cavity (1), one side, close to the left end, of the upper surface of the swing rod (4) is provided with a positioning convex strip (402), and the lower surface of the right end of the swing rod (4) is connected with the firing pin (5);

one side, close to the left end, of the lower surface of the pressure lever (3) is provided with a first arc-shaped groove (301), the piezoelectric ceramic stack cylinder (7) is positioned between the pressure lever (3) and the oscillating lever (4) and is close to one side of the left end, the upper end surface of the piezoelectric ceramic stack cylinder (7) is connected with the pressure lever (3) through a first arc-shaped groove (301) positioned in the pressure lever (3) and a second ball (24) of a second arc-shaped groove (702) of the piezoelectric ceramic stack cylinder (7), and a groove (701) on the lower end surface of the piezoelectric ceramic stack cylinder (7) is used for a positioning convex strip (402) of the oscillating lever (4) to be embedded and rotatably connected;

a guide blocking body (16) is arranged in an opening at the lower end of the valve body (2), the firing pin (5) is embedded into a through hole (161) of the guide blocking body (16), the firing pin (5) extends into the glue storage cavity (601) of the glue feeding mechanism (6), the lower end of the firing pin (5) corresponds to an impact surface (171) of the nozzle (17), and a second spring (18) is arranged between the upper end surface of the firing pin (5) and the guide blocking body (16).

2. The piezoelectric injection valve according to claim 1 wherein: the cross section of the first arc-shaped groove (301) is semicircular.

3. The piezoelectric injection valve according to claim 1 wherein: the coefficient of stiffness of the supporting spring (15) is larger than that of the second spring (18).

4. The piezoelectric injection valve according to claim 1 wherein: the supporting spring (15) is sleeved on the convex pin column (401) of the swinging rod (4).