CN213468454U

CN213468454U - Firing pin stroke correction and adjustment mechanism of piezoelectric dispensing valve

Info

Publication number: CN213468454U
Application number: CN202021727963.9U
Authority: CN
Inventors: 黄清耀
Original assignee: Xiamen Weishengbang Fluid Technology Co Ltd
Current assignee: Xiamen Weishengbang Fluid Technology Co Ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-06-18
Anticipated expiration: 2030-08-18

Abstract

The utility model relates to a firing pin stroke correction adjustment mechanism of piezoelectric dispensing valve, piezoelectric dispensing valve include the valve body and install piezoceramics, drive arm and firing pin in the valve body, drive arm one end with piezoceramics contact, the other end with the firing pin contact, wherein, firing pin stroke correction adjustment mechanism installs in the valve body, including adjusting nut, regulation pole and spring; the adjusting nut is mounted at the top end of the adjusting rod, the adjusting rod is movably mounted in the valve body, the lower end of the adjusting rod is abutted against the transmission arm and is opposite to the firing pin, the spring is sleeved on the adjusting rod, the upper end of the spring is abutted against the limiting part arranged on the adjusting rod, and the lower end of the spring is abutted against the valve body, so that the spring can move along with the adjusting rod. The utility model discloses simple structure, simple to operate adjusts the convenience and adjust the precision higher.

Description

Firing pin stroke correction and adjustment mechanism of piezoelectric dispensing valve

Technical Field

The utility model relates to a piezoelectricity dispensing valve specifically relates to a firing pin stroke correction adjustment mechanism of piezoelectricity dispensing valve.

Background

Piezoelectric dispensing valves are widely used in the dispensing industry. With the demand for dispensing quality becoming higher and higher, the stroke of the firing pin needs to be corrected and adjusted to meet different dispensing requirements. The conventional piezoelectric dispensing valve is not provided with a corresponding striker stroke correction and adjustment mechanism, or the striker stroke correction and adjustment mechanism has a small adjustment range or relatively low adjustment precision, so that the individualized requirements of customers cannot be met.

Disclosure of Invention

The utility model aims at providing a firing pin stroke correction adjustment mechanism of piezoelectricity dispensing valve to solve above-mentioned problem. Therefore, the utility model discloses a specific technical scheme as follows:

a firing pin stroke correcting and adjusting mechanism of a piezoelectric dispensing valve comprises a valve body, piezoelectric ceramics, a transmission arm and a firing pin, wherein the piezoelectric ceramics, the transmission arm and the firing pin are arranged in the valve body; the adjusting nut is mounted at the top end of the adjusting rod, the adjusting rod is movably mounted in the valve body, the lower end of the adjusting rod is abutted against the transmission arm and is opposite to the firing pin, the spring is sleeved on the adjusting rod, the upper end of the spring is abutted against the limiting part arranged on the adjusting rod, and the lower end of the spring is abutted against the valve body, so that the spring can move along with the adjusting rod.

Further, the striker stroke correction adjustment mechanism further comprises an adjustment base fixedly mounted in the valve body and having a screw hole penetrating therethrough in the up-down direction, and the adjustment rod passes through the screw hole and is in threaded engagement with the screw hole.

Further, the regulation base includes a cylindrical upper portion inserted into the valve body and a rectangular lower portion.

Furthermore, the upper end of the spring is abutted to the limiting part, and the adjusting rod above the limiting part is sleeved with a spring pad.

Further, the top of adjusting the pole is equipped with the mounting groove, adjusting nut fixed mounting in the mounting groove.

Furthermore, the mounting groove is circular, a pair of cylindrical protrusions which are opposite in the radial direction are arranged on the side wall of the mounting groove, and a groove matched with the cylindrical protrusions is formed in the adjusting nut.

Furthermore, the lower end of the adjusting rod is thin.

The utility model adopts the above technical scheme, the beneficial effect who has is: the utility model discloses simple structure, simple to operate adjusts the convenience and adjust the precision higher.

Drawings

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

Fig. 1 is a perspective view of a striker stroke correction adjustment mechanism of the present invention;

FIG. 2 is an exploded view of the striker travel correction adjustment mechanism shown in FIG. 1;

FIG. 3 is a front view of a piezoelectric dispensing valve having the firing pin stroke correction adjustment mechanism shown in FIG. 1 with the valve cover removed to show the internal structure;

FIG. 4 is a side view of the piezoelectric dispensing valve shown in FIG. 3;

fig. 5 is a sectional view of the piezoelectric dispensing valve taken along line a-a in fig. 4.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 5, a striker stroke correction adjustment mechanism 1 of a piezoelectric dispensing valve is described. The piezoelectric dispensing valve comprises a valve body 2, piezoelectric ceramics 3 arranged in the valve body 2, a transmission arm 4 and a firing pin 5, wherein one end of the transmission arm 4 is contacted with the piezoelectric ceramics 3, the other end of the transmission arm is contacted with the firing pin 5, the structure of the transmission arm is known, and the description is omitted. The striker stroke correction adjustment mechanism 1 is mounted in the valve body 2 for adjusting the stroke of the striker 5. Specifically, the striker stroke correction adjustment mechanism 1 may include an adjustment nut 11, an adjustment lever 12, and a first spring 13; wherein, the adjusting nut 11 is installed on the top end of the adjusting rod 12 to facilitate the adjusting operation. An adjustment lever 12 is movably mounted in the valve body 2 and its lower end abuts against the driving arm 4, opposite to the striker 5. That is, the adjustment lever 12 and the striker 5 are in contact with the upper and lower surfaces of the transmission arm 4, respectively. The first spring 13 is sleeved on the adjusting rod 12, the upper end of the first spring is abutted against the limiting part 121 arranged on the adjusting rod 12, and the lower end of the first spring is abutted against the valve body 2, so that the first spring 13 can move along with the adjusting rod 12. Specifically, when the adjusting nut 11 is screwed clockwise, the adjusting lever 12 moves downward, the first spring 13 is compressed, and when the adjusting lever 12 is rotated to contact the driving arm and downward, the current value reaches a predetermined value to perform a correction adjustment of the stroke of the striker. The magnitude of the current represents the resistance experienced by the piezoelectric motor actuator. At the moment, the rising elastic force is the elastic force of the second spring 6 sleeved on the firing pin 5, the elastic force reaching the contact adjusting rod 12 is the elastic force of the second spring 6 minus the elastic force of the first spring 13, the starting elastic force value at the starting moment when the transmission arm descends next time is the elastic force of the second spring 6 minus the elastic force of the first spring 13, the starting elastic force is reduced, the descending response is enhanced, the descending time is shortened, the descending time can be set to be shorter, the acceleration is larger, larger impact force is generated, the impact force of the dispensing firing pin is improved, and the dispensing process is suitable for dispensing processes with higher requirements.

For ease of installation, the striker stroke correction adjustment mechanism 1 may further include an adjustment base 14, the adjustment base 14 being fixedly installed in the valve body 2 and having a through hole 143 through which the adjustment rod 12 passes. Specifically, the adjustment base 14 comprises a cylindrical upper portion 141 and a rectangular lower portion 142, said cylindrical upper portion 141 being inserted in said valve body 2 and being fixed by means of corresponding screws, the rectangular lower portion 142 serving a limiting function.

Preferably, the adjusting rod 12 above the position-limiting part 121 is sleeved with a spring pad 15 to ensure that the upper end of the first spring does not disengage from the position-limiting part 121.

In the illustrated embodiment, the adjusting nut 11 and the adjusting rod 12 are specifically mounted in a circular mounting groove 122 at the top end of the adjusting rod 12, and the adjusting nut 11 is fixedly mounted (e.g., by a screw) in the mounting groove 122. Further, a pair of diametrically opposite cylindrical protrusions 1221 are disposed on the side wall of the mounting groove 122, and a groove 111 engaged with the cylindrical protrusions 1221 is disposed on the adjusting nut 11.

In the embodiment shown, the lower end 123 of the adjustment rod 12 is thin, in line with the firing pin 5 and of substantially the same diameter.

The installation and use of the present invention will be briefly described below. During installation, the adjusting base 14 is fixed and installed by using screws, the first spring 13 and the spring pad 15 are sleeved on the adjusting rod 12 and then inserted into the installing hole of the valve body 2, and finally the adjusting nut 11 is fixed on the adjusting rod 12, so that the installation is very convenient. When the device is used, the adjusting nut 11 is screwed or unscrewed, so that the current value reaches a preset value, the stroke of the firing pin can be corrected and adjusted, the device is very convenient, and the adjustment precision is high.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A firing pin stroke correction and adjustment mechanism of a piezoelectric dispensing valve comprises a valve body, piezoelectric ceramics, a transmission arm and a firing pin, wherein the piezoelectric ceramics, the transmission arm and the firing pin are arranged in the valve body; the adjusting nut is mounted at the top end of the adjusting rod, the adjusting rod is movably mounted in the valve body, the lower end of the adjusting rod is abutted against the transmission arm and is opposite to the firing pin, the spring is sleeved on the adjusting rod, the upper end of the spring is abutted against the limiting part arranged on the adjusting rod, and the lower end of the spring is abutted against the valve body, so that the spring can move along with the adjusting rod.

2. The striker stroke correcting and adjusting mechanism according to claim 1, further comprising an adjusting base fixedly mounted in said valve body and having a through hole through which said adjusting rod passes.

3. The striker stroke correcting adjustment mechanism of claim 2, characterized in that the adjustment base comprises a cylindrical upper portion inserted into the valve body and a rectangular lower portion.

4. The striker stroke correcting and adjusting mechanism according to claim 1, wherein a spring washer is fitted over the adjusting lever above the stopper.

5. The striker stroke correcting and adjusting mechanism according to claim 1, characterized in that the top end of the adjusting lever is provided with a mounting groove, and the adjusting nut is fixedly mounted in the mounting groove.

6. The striker stroke correcting and adjusting mechanism according to claim 5, wherein said mounting groove is circular and has a pair of diametrically opposed cylindrical projections on a side wall thereof, and said adjusting nut has a recess for engaging said cylindrical projections.

7. The striker stroke correcting and adjusting mechanism according to claim 1, characterized in that the lower end of said adjusting lever is thin.