CN113856997B - Bilateral actuating injection dispensing valve with two-stage amplification mechanism and glue injection method thereof - Google Patents
Bilateral actuating injection dispensing valve with two-stage amplification mechanism and glue injection method thereof Download PDFInfo
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- CN113856997B CN113856997B CN202111321982.0A CN202111321982A CN113856997B CN 113856997 B CN113856997 B CN 113856997B CN 202111321982 A CN202111321982 A CN 202111321982A CN 113856997 B CN113856997 B CN 113856997B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
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Abstract
The invention discloses a bilateral actuating injection dispensing valve with a two-stage amplification mechanism and an injection method thereof. The piezoelectric driving mode of the existing injection dispensing valve has low transmission precision. One end of a first-stage amplification lever is hinged with a dispensing valve box body, and the other end of the first-stage amplification lever is hinged with one end of a connecting rod; the other end of the connecting rod is hinged with the middle part of the second-stage amplifying lever; one end of the second-stage amplification lever is hinged with the dispensing valve box body; the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator are respectively arranged above and below the primary amplification lever, and the piezoelectric ceramic pre-tightening mechanism compresses the upper piezoelectric ceramic actuator, the primary amplification lever and the lower piezoelectric ceramic actuator; the top end of the firing pin is hinged with the other end of the second-stage amplifying lever, and the bottom end of the firing pin is embedded into a firing pin cavity formed in the dispensing valve box body. The invention adopts the double piezoelectric ceramics to realize the reciprocating motion of the two-stage amplifying mechanism, has high force transmission efficiency, and adopts the piezoelectric ceramics pre-tightening mechanism to pre-tighten the double piezoelectric ceramics, thereby having accurate transmission, large displacement of the firing pin and increased glue output.
Description
Technical Field
The invention belongs to the technical field of glue dispensing, and particularly relates to a bilateral actuating spraying glue dispensing valve with a two-stage amplification mechanism and a glue spraying method thereof.
Background
The fluid dispensing technology is a process step related to the production and processing fields of optics, photoelectricity, semiconductor manufacturing and packaging, medicine and the like. Wherein the dispensing valve is the component that controls the ejection and stop of the glue. According to different working principles, the dispensing technology is generally divided into contact dispensing and non-contact dispensing.
At present, the main driving modes of the injection dispensing valve are piezoelectric ceramic driving, electromagnetic driving and pneumatic driving. The piezoelectric ceramic dispensing valve needs to adopt an amplifying mechanism because the output displacement of the piezoelectric stack is small, and the current mainstream amplifying mode is to amplify the output displacement of the piezoelectric stack by elastic deformation of the material of the amplifying mechanism, and there is also a triangular amplifying mechanism disclosed in the patent application with publication number CN 210585656U and a rhombic amplifying mechanism disclosed in the patent application with publication number CN 105289934A. However, these amplification methods have the following disadvantages: 1. the piezoelectric ceramic displacement is amplified by using the material deformation, the service life is short, and the material is easy to fatigue; 2. the transmission angle of the amplifying mechanism is small, and the force transmission performance is poor; 3. the fastener matched with the piezoelectric ceramics is easy to loosen due to material deformation under long-term use, so that the repeatability is high, and the transmission precision is low.
Therefore, a novel dispensing valve with an amplifying mechanism which is high in force transmission efficiency, not easy to loosen and easy to tighten after being loosened with a fastening piece matched with piezoelectric ceramics is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects of the traditional dispensing valve structure and provide a bilateral actuating injection dispensing valve with a two-stage amplification mechanism and a glue spraying method thereof.
The technical scheme adopted by the invention is as follows:
the invention discloses a bilateral actuating jet dispensing valve with a two-stage amplification mechanism, which comprises a dispensing valve box body, a piezoelectric ceramic pre-tightening mechanism, a displacement driving mechanism and a firing pin assembly, wherein the piezoelectric ceramic pre-tightening mechanism is arranged on the dispensing valve box body; the displacement driving mechanism comprises an upper piezoelectric ceramic actuator, a lower piezoelectric ceramic actuator, a primary amplification lever, a connecting rod and a secondary amplification lever; one end of the primary amplification lever is hinged with the dispensing valve box body, and the other end of the primary amplification lever is hinged with one end of the connecting rod; the other end of the connecting rod is hinged with the middle part of the second-stage amplifying lever; one end of the second-stage amplification lever is hinged with the dispensing valve box body; the lower piezoelectric ceramic actuator is arranged below the primary amplification lever, the upper piezoelectric ceramic actuator is arranged above the primary amplification lever, and the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator are arranged in alignment; the piezoelectric ceramic pre-tightening mechanism compresses the upper piezoelectric ceramic actuator, the first-stage amplification lever and the lower piezoelectric ceramic actuator; the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator have opposite movement directions under the condition of same-direction voltage; the distance from the upper piezoelectric ceramic actuator to the hinge shaft of the primary amplification lever and the dispensing valve box body is smaller than the distance from the upper piezoelectric ceramic actuator to the hinge shaft of the primary amplification lever and the hinge shaft of the connecting rod. The firing pin assembly comprises a firing pin and a sealing gasket; the top end of the firing pin is hinged with the other end of the secondary amplifying lever; the center distance between a hinged shaft of the connecting rod and the second-stage amplification lever and the center distance between the hinged shaft of the second-stage amplification lever and the box body of the dispensing valve are set to be L1, the center distance between the hinged shaft of the connecting rod and the second-stage amplification lever and the center distance between the hinged shaft of the second-stage amplification lever and the hinged shaft of the striker are set to be L2, and L1 is smaller than L2; the bottom end of the firing pin is embedded into a firing pin cavity arranged on the dispensing valve box body; the firing pin is arranged in parallel to the movement direction of the piezoelectric ceramic actuator; a sealing gasket is arranged between the side surface of the firing pin and the firing pin cavity; the striker and the sealing gasket divide the striker cavity into two cavities, and the cavity close to the bottom of the striker cavity is a rubber cavity; a liquid inlet channel is formed in the side wall of the rubber cavity; and a glue outlet communicated with the glue cavity is formed in the bottom of the needle hitting cavity.
Preferably, an O-shaped sealing ring is arranged between the outer ring of the sealing gasket and the firing pin cavity.
Preferably, the piezoelectric ceramic pre-tightening mechanism comprises a piezoelectric ceramic baffle and two bolts; the piezoelectric ceramic baffle is provided with two through holes; the first-stage amplifying lever is also provided with two through holes; the dispensing valve box body is provided with two threaded holes; the piezoelectric ceramic baffle is arranged at the top end of the upper piezoelectric ceramic actuator, and each bolt penetrates through a corresponding through hole of the piezoelectric ceramic baffle and a corresponding through hole of the primary amplification lever and is connected with a corresponding threaded hole of the dispensing valve box body.
Preferably, the piezoelectric ceramic pre-tightening mechanism comprises a pre-tightening force amplification lever and a pre-tightening screw; one end of the pretightening force amplifying lever is hinged with the dispensing valve box body, and the middle part of the bottom surface of the pretightening force amplifying lever is contacted with the top end of the upper piezoelectric ceramic actuator; the pre-tightening screw is connected with a threaded hole formed in the dispensing valve box body and compresses the top surface of the other end of the pre-tightening force amplifying lever.
The glue spraying method of the bilateral actuating spraying dispensing valve with the two-stage amplification mechanism comprises the following specific steps:
firstly, pre-tightening an upper piezoelectric ceramic actuator and a lower piezoelectric ceramic actuator through a piezoelectric ceramic pre-tightening mechanism; then, the glue supply device supplies glue to the glue cavity from a liquid inlet channel of the dispensing valve box body; the upper piezoelectric ceramic actuator is electrified with forward voltage, after the lower piezoelectric ceramic actuator is electrified with reverse voltage, the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator generate deformation to drive the first-stage amplification lever to lift upwards, the first-stage amplification lever transmits power to the second-stage amplification lever through the connecting rod, and the second-stage amplification lever drives the firing pin to move vertically upwards; the vertical displacement of the firing pin is greater than that of the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator due to the displacement amplification effect of the first-stage amplification lever and the second-stage amplification lever; when the firing pin moves vertically upwards, the glue solution in the glue supply device enters the glue cavity from the liquid inlet channel; then, a reverse voltage is applied to the upper piezoelectric ceramic actuator, a forward voltage is applied to the lower piezoelectric ceramic actuator, the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator deform to drive the primary amplification lever to press downwards, the primary amplification lever transmits power to the secondary amplification lever through the connecting rod, the secondary amplification lever drives the firing pin to move vertically downwards to extrude the glue solution in the glue cavity, so that the glue solution in the glue cavity is extruded out of the glue outlet, and the glue outlet is closed; the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator input voltages in opposite directions in a reciprocating manner, and the glue solution is extruded out of the glue outlet by the striker continuously.
Preferably, the piezoelectric ceramic pre-tightening mechanism pre-tightens the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator by adopting one of the following two schemes: (1) the bolts for connecting the piezoelectric ceramic baffle and the dispensing valve box body are screwed down, so that the piezoelectric ceramic baffle compresses the upper piezoelectric ceramic actuator, and the first-stage amplification lever compresses the lower piezoelectric ceramic actuator; (2) the bottom surface of a pretightening force amplifying lever with one end hinged with the dispensing valve box body is contacted with the top surface of the upper piezoelectric ceramic actuator, then a pretightening screw is screwed, and the other end of the pretightening force amplifying lever is pressed downwards, so that the bottom surface of the pretightening force amplifying lever compresses the upper piezoelectric ceramic actuator, and the first-stage amplifying lever compresses the lower piezoelectric ceramic actuator.
The invention has the beneficial effects that:
1) The double piezoelectric ceramics are adopted to realize the reciprocating motion of a two-stage amplification mechanism (comprising a first-stage amplification lever and a second-stage amplification lever), a slow return mode of a return spring is not needed, the force transmission efficiency is improved, the double piezoelectric ceramics work in opposite phases (one is tensioned and the other is relaxed), the fixed distance between the double piezoelectric ceramics is unchanged, and the stress is balanced; and the piezoelectric ceramic pre-tightening mechanism is adopted to pre-tighten the double piezoelectric ceramic, so that the double piezoelectric ceramic is not easy to loosen after pre-tightening, and accurate transmission is ensured.
2) The invention adopts a two-stage amplifying mechanism, compared with the traditional dispensing valve, the displacement of the firing pin is further amplified, and the glue output is increased.
3) The displacement amplification of the invention is realized by force transmission of a two-stage amplification mechanism, not by material deformation, and has good reliability and more accurate movement.
4) The two-stage amplification mechanism has a large transmission angle of almost 90 degrees, high force transmission efficiency and good force transmission effect.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of a piezoelectric ceramic pre-tightening mechanism of the present invention employing a piezoelectric ceramic baffle and two bolts;
FIG. 2 is a perspective view of the overall structure of the piezoelectric ceramic pre-tightening mechanism of the present invention using a piezoelectric ceramic baffle and two bolts;
FIG. 3 is a schematic diagram of the overall structure of the piezoelectric ceramic pre-tightening mechanism of the present invention using a pre-tightening force amplification lever and a pre-tightening screw;
FIG. 4 is a schematic diagram of the movement of a piezoelectric ceramic pre-tightening mechanism adopting a piezoelectric ceramic baffle and two bolts according to the present invention;
in the figure: 1. the device comprises a box body, 2, a first-stage amplification lever, 3, a piezoelectric ceramic baffle, 4, a bolt, 5, upper piezoelectric ceramic, 6, lower piezoelectric ceramic, 7, a connecting rod, 8, a second-stage amplification lever, 9, a firing pin, 10, a sealing gasket, 11, a rubber cavity, 12, an O-shaped sealing ring, 13, a rubber outlet, 14, a liquid inlet channel, 15, a pre-tightening force amplification lever and 16, pre-tightening screws.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, 2 and 4, the bilateral actuation injection dispensing valve with a two-stage amplification mechanism comprises a dispensing valve box body 1, a piezoelectric ceramic pre-tightening mechanism, a displacement driving mechanism and a firing pin assembly. The displacement driving mechanism comprises an upper piezoelectric ceramic actuator 5, a lower piezoelectric ceramic actuator 6, a primary amplification lever 2, a connecting rod 7 and a secondary amplification lever 8; one end of the primary amplification lever 2 is hinged with the dispensing valve box body 1, and the other end is hinged with one end of the connecting rod 7; the other end of the connecting rod 7 is hinged with the middle part of the second-stage amplifying lever 8; one end of the second-stage amplification lever 8 is hinged with the dispensing valve box body 1; the lower piezoelectric ceramic actuator 6 is arranged below the primary amplification lever 2, the upper piezoelectric ceramic actuator 5 is arranged above the primary amplification lever 2, and the upper piezoelectric ceramic actuator 5 and the lower piezoelectric ceramic actuator 6 are arranged in alignment; the piezoelectric ceramic pre-tightening mechanism compresses the upper piezoelectric ceramic actuator 5, the first-stage amplification lever 2 and the lower piezoelectric ceramic actuator 6; the movement directions of the upper piezoelectric ceramic actuator 5 and the lower piezoelectric ceramic actuator 6 are opposite when voltages in the same direction are applied; the distance from the upper piezoelectric ceramic actuator 5 to the hinge shaft of the primary amplification lever 2 and the dispensing valve box body 1 is smaller than the distance from the upper piezoelectric ceramic actuator 5 to the hinge shaft of the primary amplification lever 2 and the connecting rod 7. The firing pin assembly comprises a firing pin 9 and a sealing gasket 10; the top end of the firing pin 9 is hinged with the other end of the secondary amplifying lever 8; the center distance between a hinged shaft of the connecting rod 7 and the second-stage amplification lever 8 and between the second-stage amplification lever 8 and a hinged shaft of the dispensing valve box body 1 is set to be L1, the center distance between a hinged shaft of the connecting rod 7 and the second-stage amplification lever 8 and between a hinged shaft of the second-stage amplification lever 8 and the striker 9 is set to be L2, and L1 is smaller than L2; the bottom end of the firing pin 9 is embedded into a firing pin cavity arranged on the dispensing valve box body 1; the firing pin is arranged in parallel to the movement direction of the piezoelectric ceramic actuator; a sealing gasket 10 is arranged between the side surface of the firing pin and the firing pin cavity; the striker cavity is divided into two cavities by the striker and the sealing gasket, and the cavity close to the bottom of the striker cavity is a rubber cavity 11; the side wall of the glue cavity is provided with a liquid inlet channel 14; the bottom of the needle hitting cavity is provided with a glue outlet 13 communicated with the glue cavity.
As a preferred embodiment, an O-shaped sealing ring 12 is arranged between the outer ring of the sealing gasket and the firing pin cavity; the O-shaped sealing ring 12 can promote the sealing gasket to achieve a more excellent sealing effect on the striker, so that the phenomenon that the pressurized glue solution is leaked into the glue valve box body 1 to cause pollution is prevented.
As a preferred embodiment, as shown in fig. 1, the piezoceramic preloading mechanism comprises a piezoceramic baffle 3 and two bolts 4; the piezoelectric ceramic baffle 3 is provided with two through holes; the first-stage amplifying lever 2 is also provided with two through holes; the dispensing valve box body 1 is provided with two threaded holes; the piezoelectric ceramic baffle 3 is arranged at the top end of the upper piezoelectric ceramic actuator 5, each bolt 4 penetrates through a corresponding through hole of the piezoelectric ceramic baffle 3 and a corresponding through hole of the primary amplification lever 2 and is connected with a corresponding threaded hole of the dispensing valve box body 1, and the piezoelectric ceramic baffle 3 compresses the upper piezoelectric ceramic actuator 5.
As a preferred embodiment, as shown in fig. 3, the piezoceramic pre-tightening mechanism comprises a pre-tightening force amplifying lever 15 and a pre-tightening screw 16; one end of the pretightening force amplifying lever 15 is hinged with the dispensing valve box body 1, and the middle part of the bottom surface is contacted with the top end of the upper piezoelectric ceramic actuator 5; the pre-tightening screw 16 is connected with a threaded hole formed in the dispensing valve box body 1 and compresses the top surface of the other end of the pre-tightening force amplification lever 15, so that the pre-tightening force amplification lever 15 applies pre-tightening force to the upper piezoelectric ceramic actuator 5. The pretension amplifying lever 15 plays a role in amplifying the pretension force of the pretension screw 16.
The glue spraying method of the bilateral actuating spraying dispensing valve with the two-stage amplification mechanism comprises the following specific steps:
firstly, pre-tightening an upper piezoelectric ceramic actuator 5 and a lower piezoelectric ceramic actuator 6 through a piezoelectric ceramic pre-tightening mechanism; then, the glue supply device supplies glue to the glue cavity from a liquid inlet channel 14 of the dispensing valve box body; after a forward voltage is applied to the upper piezoelectric ceramic actuator 5, and a reverse voltage is applied to the lower piezoelectric ceramic actuator 6, the upper piezoelectric ceramic actuator 5 and the lower piezoelectric ceramic actuator 6 deform to drive the first-stage amplification lever 2 to lift upwards, the first-stage amplification lever 2 transmits power to the second-stage amplification lever 8 through the connecting rod 7, and the second-stage amplification lever 8 drives the striker 9 to move vertically upwards; the vertical displacement of the striker 9 is greater than that of the upper piezoceramic actuator 5 and the lower piezoceramic actuator 6 due to the displacement amplification effect of the primary amplification lever 2 and the secondary amplification lever 8; when the firing pin 9 moves vertically upwards, the glue solution in the glue supply device enters the glue cavity from the liquid inlet channel 14; then, a reverse voltage is applied to the upper piezoelectric ceramic actuator 5, a forward voltage is applied to the lower piezoelectric ceramic actuator 6, the upper piezoelectric ceramic actuator 5 and the lower piezoelectric ceramic actuator 6 deform to drive the first-stage amplification lever 2 to press downwards, the first-stage amplification lever 2 transmits power to the second-stage amplification lever 8 through the connecting rod 7, the second-stage amplification lever 8 drives the firing pin 9 to move vertically downwards to extrude the glue solution in the glue cavity, so that the glue solution in the glue cavity is extruded from the glue outlet, and the glue outlet is closed at the same time; the upper piezoelectric ceramic actuator 5 and the lower piezoelectric ceramic actuator 6 input voltages in opposite directions in a reciprocating manner, and the glue solution is continuously extruded out of the glue outlet by the striker.
As a preferred embodiment, the piezoceramic pre-tensioning mechanism pre-tensions the upper piezoceramic actuator 5 and the lower piezoceramic actuator 6 in one of two ways: (1) the bolts 4 for connecting the piezoelectric ceramic baffle 3 and the dispensing valve box body 1 are screwed down, so that the piezoelectric ceramic baffle 3 compresses the upper piezoelectric ceramic actuator 5, and the first-stage amplification lever 2 compresses the lower piezoelectric ceramic actuator 6; (2) the bottom surface of a pretightening force amplifying lever 15, one end of which is hinged with the dispensing valve box body 1, is contacted with the top surface of the upper piezoelectric ceramic actuator 5, then a pretightening screw 16 is screwed, and the other end of the pretightening force amplifying lever 15 is pressed downwards, so that the bottom surface of the pretightening force amplifying lever 15 is pressed against the upper piezoelectric ceramic actuator 5, and the first-stage amplifying lever 2 is pressed against the lower piezoelectric ceramic actuator 6.
Claims (6)
1. Bilateral actuating injection dispensing valve with two-stage amplification mechanism comprises a dispensing valve box body, a displacement driving mechanism and a firing pin assembly, and is characterized in that: the piezoelectric ceramic pre-tightening mechanism is also included; the displacement driving mechanism comprises an upper piezoelectric ceramic actuator, a lower piezoelectric ceramic actuator, a primary amplification lever, a connecting rod and a secondary amplification lever; one end of the primary amplification lever is hinged with the dispensing valve box body, and the other end of the primary amplification lever is hinged with one end of the connecting rod; the other end of the connecting rod is hinged with the middle part of the second-stage amplifying lever; one end of the second-stage amplification lever is hinged with the dispensing valve box body; the lower piezoelectric ceramic actuator is arranged below the primary amplification lever, the upper piezoelectric ceramic actuator is arranged above the primary amplification lever, and the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator are arranged in alignment; the piezoelectric ceramic pre-tightening mechanism compresses the upper piezoelectric ceramic actuator, the first-stage amplification lever and the lower piezoelectric ceramic actuator; the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator have opposite movement directions under the condition of being electrified with voltages in the same direction; the distance from the upper piezoelectric ceramic actuator to the hinge shaft of the primary amplification lever and the dispensing valve box body is smaller than the distance from the upper piezoelectric ceramic actuator to the hinge shaft of the primary amplification lever and the hinge shaft of the connecting rod; the firing pin assembly comprises a firing pin and a sealing gasket; the top end of the firing pin is hinged with the other end of the secondary amplifying lever; the center distance between a hinged shaft of the connecting rod and the second-stage amplification lever and the center distance between the hinged shaft of the second-stage amplification lever and the box body of the dispensing valve are set to be L1, the center distance between the hinged shaft of the connecting rod and the second-stage amplification lever and the center distance between the hinged shaft of the second-stage amplification lever and the hinged shaft of the striker are set to be L2, and L1 is smaller than L2; the bottom end of the firing pin is embedded into a firing pin cavity arranged on the dispensing valve box body; the firing pin is arranged in parallel to the movement direction of the piezoelectric ceramic actuator; a sealing gasket is arranged between the side surface of the firing pin and the firing pin cavity; the striker and the sealing gasket divide the striker cavity into two cavities, and the cavity close to the bottom of the striker cavity is a rubber cavity; a liquid inlet channel is formed in the side wall of the rubber cavity; and a glue outlet communicated with the glue cavity is formed in the bottom of the needle hitting cavity.
2. The dual edge actuated spray dispensing valve with a two-stage amplification mechanism of claim 1, wherein: an O-shaped sealing ring is arranged between the outer ring of the sealing gasket and the firing pin cavity.
3. The dual edge actuated spray dispensing valve with a two stage amplification mechanism of claim 1, wherein: the piezoelectric ceramic pre-tightening mechanism comprises a piezoelectric ceramic baffle and two bolts; the piezoelectric ceramic baffle is provided with two through holes; the first-stage amplification lever is also provided with two through holes; the dispensing valve box body is provided with two threaded holes; the piezoelectric ceramic baffle is arranged at the top end of the upper piezoelectric ceramic actuator, and each bolt penetrates through a corresponding through hole of the piezoelectric ceramic baffle and a corresponding through hole of the primary amplification lever and is connected with a corresponding threaded hole of the dispensing valve box body.
4. The dual edge actuated spray dispensing valve with a two stage amplification mechanism of claim 1, wherein: the piezoelectric ceramic pre-tightening mechanism comprises a pre-tightening force amplifying lever and a pre-tightening screw; one end of the pretightening force amplifying lever is hinged with the dispensing valve box body, and the middle part of the bottom surface of the pretightening force amplifying lever is contacted with the top end of the upper piezoelectric ceramic actuator; the pre-tightening screw is connected with a threaded hole formed in the dispensing valve box body and compresses the top surface of the other end of the pre-tightening force amplifying lever.
5. The method of dispensing a bilaterally actuated dispensing valve with a two-stage amplification mechanism according to any one of claims 1 to 4, wherein: the method comprises the following steps:
firstly, pre-tightening an upper piezoelectric ceramic actuator and a lower piezoelectric ceramic actuator through a piezoelectric ceramic pre-tightening mechanism; then, the glue supply device supplies glue to the glue cavity from a liquid inlet channel of the dispensing valve box body; the upper piezoelectric ceramic actuator is electrified with forward voltage, after the lower piezoelectric ceramic actuator is electrified with reverse voltage, the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator generate deformation to drive the first-stage amplification lever to lift upwards, the first-stage amplification lever transmits power to the second-stage amplification lever through the connecting rod, and the second-stage amplification lever drives the firing pin to move vertically upwards; the vertical displacement of the firing pin is greater than that of the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator due to the displacement amplification effect of the first-stage amplification lever and the second-stage amplification lever; when the firing pin moves vertically upwards, the glue solution in the glue supply device enters the glue cavity from the liquid inlet channel; then, a reverse voltage is applied to the upper piezoelectric ceramic actuator, a forward voltage is applied to the lower piezoelectric ceramic actuator, the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator deform to drive the first-stage amplification lever to press downwards, the first-stage amplification lever transmits power to the second-stage amplification lever through the connecting rod, the second-stage amplification lever drives the firing pin to move vertically downwards to extrude the glue solution in the glue cavity, so that the glue solution in the glue cavity is extruded from the glue outlet, and the glue outlet is closed at the same time; the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator input voltages in opposite directions in a reciprocating mode, and the striker continuously extrudes glue from the glue outlet.
6. The method of claim 5 wherein the dual side actuated dispensing valve with a two stage amplification mechanism further comprises: the mode that the piezoelectric ceramic pre-tightening mechanism pre-tightens the upper piezoelectric ceramic actuator and the lower piezoelectric ceramic actuator adopts one of the following two schemes: (1) the bolts for connecting the piezoelectric ceramic baffle and the dispensing valve box body are screwed down, so that the piezoelectric ceramic baffle compresses the upper piezoelectric ceramic actuator, and the first-stage amplification lever compresses the lower piezoelectric ceramic actuator; (2) the bottom surface of a pretightening force amplifying lever, one end of which is hinged with the dispensing valve box body, is contacted with the top surface of the upper piezoelectric ceramic actuator, then a pretightening screw is screwed, and the other end of the pretightening force amplifying lever is pressed downwards, so that the bottom surface of the pretightening force amplifying lever compresses the upper piezoelectric ceramic actuator, and the first-stage amplifying lever compresses the lower piezoelectric ceramic actuator.
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| CN202111321982.0A CN113856997B (en) | 2021-11-09 | 2021-11-09 | Bilateral actuating injection dispensing valve with two-stage amplification mechanism and glue injection method thereof |
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| CN202111321982.0A CN113856997B (en) | 2021-11-09 | 2021-11-09 | Bilateral actuating injection dispensing valve with two-stage amplification mechanism and glue injection method thereof |
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| CN114308548B (en) * | 2022-03-07 | 2022-05-27 | 河北工业大学 | Non-impact fluid jet dispensing system |
| CN115614616A (en) * | 2022-10-17 | 2023-01-17 | 中国工程物理研究院应用电子学研究所 | Single-drive bipolar displacement amplifier and displacement amplification device for optical axis adjustment |
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| CN102935416B (en) * | 2012-11-28 | 2015-08-19 | 中南大学 | Based on the glue dispensing valve of Piezoelectric Ceramic and flexible magnifying arm |
| CN205361845U (en) * | 2015-12-16 | 2016-07-06 | 河南理工大学 | Glue dispersing device |
| CN105499072B (en) * | 2016-01-20 | 2018-06-22 | 中南大学 | Piezoelectric Ceramic glue dispensing valve |
| EP3335805B1 (en) * | 2016-12-19 | 2019-04-03 | Nordson Corporation | Piezoelectric jetting dispenser |
| CN109092584A (en) * | 2018-10-24 | 2018-12-28 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | The micro- spray valve of Piezoelectric Ceramic |
| CN212518837U (en) * | 2020-08-03 | 2021-02-09 | 安兴精密(深圳)有限公司 | High-frequency reciprocating mechanism |
| CN112838787A (en) * | 2021-03-17 | 2021-05-25 | 衣春学 | Stick-slip piezoelectric driver with two-stage amplification mechanism and driving method thereof |
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