Dispensing valve capable of being quantitatively adjusted

Abstract

The utility model provides a dispensing valve capable of being quantitatively adjusted, which relates to the technical field of electronic packaging and comprises a dispensing valve body, a glue channel is arranged on the inner wall of the dispensing valve body, a glue pressing rod is slidably connected to the inner wall of the glue channel, a pressing head is fixed at the bottom of the glue pressing rod, a glue fixing bin is fixed at the bottom end of the inner wall of the glue channel, and an arc chute is arranged on the inner wall of the bottom end of the glue fixing bin. The problem that in dispensing production, particularly in a system using a piezoelectric dispensing valve, the glue output amount is generally in direct relation with the diameter of a dispensing head, which means that once the dispensing head is selected, the diameter of the dispensing head is fixed, so that the adjustability of the glue output amount is limited, and the production cost is reduced is solved by adopting a residual ring piece mounting mode. Due to the fact that the piezoelectric dispensing valve depends on precise control of tiny deformation generated by piezoelectric materials to achieve accurate jetting of fluid, if the diameter of a dispensing head which determines the glue outlet amount cannot be changed, in the different production processes needing different glue outlet amounts, the applicability and flexibility of equipment are remarkably limited, and the production efficiency is greatly improved. And the application range of equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic packaging, in particular to a quantitatively adjustable glue dispensing valve. Background Art

[0002] A dispensing valve is a device used to control, adjust and accurately spray a certain amount of fluid (such as glue, paint, etc.). It is widely used in many industrial fields. The working principle of the dispensing valve is mainly divided into two types: pneumatic and electric. The pneumatic dispensing valve is driven by compressed air to press the glue out to the needle, while the electric dispensing valve adopts a single screw structure to realize the medium conveying function by the interaction between the rotor and the stator. According to different application requirements, dispensing valves can be classified into different categories, such as plunger type, ejector type, lifting type, spray type and injection type, etc., each of which is suitable for different types of fluids and process requirements.

[0003] In the prior art, during glue dispensing production, especially in systems using piezoelectric dispensing valves, the amount of glue discharged is usually directly related to the diameter of the dispensing head, which means that once the dispensing head is selected, its diameter is fixed, thereby limiting the adjustability of the amount of glue discharged. Since the piezoelectric dispensing valve relies on precise control of the tiny deformations produced by the piezoelectric material to achieve accurate fluid injection, if the diameter of the dispensing head that determines the amount of glue discharged cannot be changed, then in different production processes requiring different amounts of glue discharged, the applicability and flexibility of the equipment will be significantly limited, reducing the scope of application of the equipment. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a quantitatively adjustable dispensing valve.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a quantitatively adjustable dispensing valve comprises a dispensing valve body, a dispensing valve body having a glue channel on the inner wall of the dispensing valve body, a glue pressing rod being slidably connected to the inner wall of the glue channel, a pressure head being fixed to the bottom of the glue pressing rod, a glue storage bin being fixed at the bottom end of the inner wall of the glue channel, an arc groove being provided on the inner wall of the bottom end of the glue storage bin, a top groove being provided on the top of the arc groove, a residual ring being slidably connected to the inner wall of the arc groove, a top protrusion of the residual ring being slidably connected to the inner wall of the top groove, a reset spring being fixed to one side of the top protrusion of the residual ring, one end of the reset spring being fixed to the inner wall of the dispensing valve body, and the dispensing valve body having a glue channel on the inner wall of the glue channel ... The inner wall of the bottom end of the valve body is provided with a ring square groove, the inner wall of the ring square groove is provided with a ring groove part, the inner wall of the ring groove part is slidably connected with a transmission ring, the circumferential array at the bottom end of the transmission ring is provided with a ring pull groove, the inner wall of the ring pull groove is meshed with a driving gear, and the driving gear is driven by a motor, and the motor is arranged inside the dispensing valve body, and a fixed tooth is fixed to the circumferential array at the top of the transmission ring, a circular groove ring part is fixed on the surface of the ring groove part, and an auxiliary ring is rotatably connected to the circumference of the circular groove ring part, and the inner wall of the auxiliary ring is provided with rifling, and a residual push circle is fixed on the circumferential surface of the auxiliary ring. In the prior art, in the dispensing production, especially in the system using a piezoelectric dispensing valve, The glue output is usually directly related to the diameter of the glue dispensing head, which means that once the glue dispensing head is selected, its diameter is fixed, which limits the adjustability of the glue output. Since the piezoelectric dispensing valve relies on the precise control of the tiny deformation of the piezoelectric material to achieve accurate fluid injection, if the diameter of the glue dispensing head that determines the glue output cannot be changed, then in different production processes that require different glue outputs, the applicability and flexibility of the equipment will be significantly limited, reducing the scope of application of the equipment. In response to such problems, the utility model adopts the method of installing residual ring parts to solve the problem, so that when the staff needs to reduce the glue output, the staff can start The motor is driven, and the motor meshes to drive the transmission ring to rotate, so that the fixed tooth slides along the rifling of the auxiliary ring. Due to the existence of the rifling, the auxiliary ring rotates, and the residual push circle is rotated to the residual ring part, and the residual ring part is squeezed out of the arc slide groove. Multiple residual ring parts are gathered and pieced together to reduce the diameter of the inner wall of the bottom end of the fixed glue bin, thereby reducing the glue output of the equipment. At the same time, when the staff needs to restore the glue output, the motor is started again to make the auxiliary ring continue to rotate, and the residual push circle leaves the residual ring part. The reset spring releases the elastic potential energy, pulls the residual ring part back to the arc slide groove, and restores the diameter of the inner wall of the bottom end of the fixed glue bin, which is convenient for the staff to adjust the glue output, thereby achieving the effect of increasing the application range of the equipment.

[0006] Preferably, a limiting circle is fixed on the circumference of the glue pressing rod, and the diameter of the limiting circle is larger than the inner diameter of the glue bin. In the prior art, when the piezoelectric material is deformed abnormally, causing the glue pressing rod to descend excessively, the pressure head will hit the bottom of the equipment, causing damage to the equipment and reducing the service life of the equipment. To solve this problem, the utility model adopts the method of installing a limiting circle to achieve a solution, so that when the piezoelectric material is deformed abnormally, the limiting circle can prevent the glue pressing rod from descending beyond the designed distance through mechanical collision due to its diameter being larger than the inner diameter of the glue bin. When the glue pressing rod descends, due to the large diameter of the limiting circle and the large contact area with the glue, the resistance encountered is also greatly increased, thereby limiting the descending speed of the glue pressing rod, preventing component damage, and achieving the effect of increasing the service life of the equipment.

[0007] Preferably, the top end of the fixed tooth is set as a round head. In the prior art, since the auxiliary ring rotates through the sliding of the inner wall rifling and the fixed tooth, the rifling will be worn out after long-term use, and since the auxiliary ring is sleeved on the circular groove ring, it is difficult to disassemble and replace, which will greatly increase the subsequent maintenance costs and time, and increase the production cost. To solve such problems, the utility model adopts the method of opening a round head to achieve a solution. By setting the top end of the fixed tooth as a round head, the wear of the inner wall rifling of the auxiliary ring is greatly reduced, thereby achieving the effect of increasing the service life of the equipment and reducing the production cost.

[0008] Preferably, the diameter of the circle formed by the plurality of residual rings is larger than the diameter of the pressure head, so as to prevent friction between the residual rings and the pressure head and improve the service life of the equipment.

[0009] Preferably, a rubber front face is fixed on the front of the dispensing valve body to reduce the impact of collision during transportation and stacking, prevent equipment damage, and improve the yield rate.

[0010] Preferably, the length and height of the square groove are greater than the sum of the height of the residual push circle, the diameter of the circular groove ring and the diameter of the auxiliary ring, so as to prevent the residual push circle from scratching the inner wall of the square groove and improve the service life of the equipment.

[0011] Preferably, the surface of the residual ring is coated with a rubber layer to increase the friction between the residual rings and improve the stability of the equipment.

[0012] Beneficial Effects

[0013] 1. In the prior art, in the dispensing production, especially in the system using piezoelectric dispensing valve, the amount of glue discharged is usually directly related to the diameter of the dispensing head, which means that once the dispensing head is selected, its diameter is fixed, thereby limiting the adjustability of the amount of glue discharged. Since the piezoelectric dispensing valve relies on the precise control of the tiny deformation produced by the piezoelectric material to achieve accurate fluid injection, if the diameter of the dispensing head that determines the amount of glue discharged cannot be changed, then in different production processes requiring different amounts of glue discharged, the applicability and flexibility of the equipment will be significantly limited, reducing the scope of application of the equipment. In view of such problems, the utility model adopts the method of installing residual ring parts to solve them, which realizes that when the staff When the glue output needs to be reduced, the staff can start the motor, and the motor meshes to drive the transmission ring to rotate, so that the fixed tooth slides along the rifling of the auxiliary ring. Due to the existence of the rifling, the auxiliary ring rotates, and the residual push circle is rotated to the residual ring part, and the residual ring part is squeezed out of the arc slide groove. Multiple residual ring parts are gathered and pieced together to reduce the diameter of the inner wall of the bottom end of the fixed glue bin, thereby reducing the glue output of the equipment. At the same time, when the staff needs to restore the glue output, the motor is started again to make the auxiliary ring continue to rotate, the residual push circle leaves the residual ring part, and the reset spring releases the elastic potential energy to pull the residual ring part back to the arc slide groove, and the diameter of the inner wall of the bottom end of the fixed glue bin is restored, which is convenient for the staff to adjust the glue output and achieve the effect of improving the application range of the equipment.

[0014] 2. In the prior art, when the piezoelectric material is deformed abnormally and the glue pressing rod is caused to descend excessively, the pressure head will hit the bottom of the equipment, causing damage to the equipment and reducing the service life of the equipment. To solve this problem, the utility model adopts the method of installing a limiting circle to achieve a solution. When the piezoelectric material is deformed abnormally, the limiting circle can prevent the glue pressing rod from descending beyond the designed distance through mechanical collision due to its diameter being larger than the inner diameter of the fixed glue bin. When the glue pressing rod descends, due to the large diameter of the limiting circle and the large contact area with the glue, the resistance is greatly increased, which limits the descending speed of the glue pressing rod, prevents component damage, and achieves the effect of increasing the service life of the equipment.

[0015] 3. In the prior art, since the auxiliary ring rotates through the sliding of the inner wall rifling and the fixed teeth, the rifling will be worn out after long-term use. In addition, since the auxiliary ring is sleeved on the circular groove ring, it is difficult to disassemble and replace, which will greatly increase the subsequent maintenance costs and time, and increase the production cost. To solve such problems, the utility model adopts a round head method to solve them. By setting the top of the fixed tooth as a round head, the wear of the inner wall rifling of the auxiliary ring is greatly reduced, thereby achieving the effect of increasing the service life of the equipment and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the dispensing valve body of the utility model;

[0018] Figure 3 It is a cross-sectional view of the glue pressing rod of the utility model;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the ring groove member of the utility model;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the transmission ring of the utility model;

[0021] Figure 6 It is an exploded view of the residual ring part of the utility model.

[0022] Legend:

[0023] 1. Dispensing valve body; 101. Rubber front face; 102. Glue channel; 103. Limiting circle; 104. Fixed glue chamber; 105. Glue pressing rod; 106. Pressing head; 2. Arc slide groove; 201. Top slide groove; 202. Residual ring part; 203. Square ring groove; 204. Ring groove part; 205. Round groove ring part; 206. Reset spring; 207. Transmission ring; 208. Ring push groove; 209. Auxiliary ring; 2010. Residual push circle; 2011. Fixed tooth; 2012. Driving gear. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0025] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Specific embodiment:

[0027] Reference Figure 1-6The quantitatively adjustable dispensing valve comprises a dispensing valve body 1, a glue channel 102 is provided on the inner wall of the dispensing valve body 1, a glue pressing rod 105 is slidably connected to the inner wall of the glue channel 102, a pressure head 106 is fixed to the bottom of the glue pressing rod 105, a fixed glue bin 104 is fixed to the bottom end of the inner wall of the glue channel 102, an arc slide 2 is provided on the inner wall of the bottom end of the fixed glue bin 104, a top slide 201 is provided on the top of the arc slide 2, a residual ring 202 is slidably connected to the inner wall of the arc slide 2, a top protrusion of the residual ring 202 is slidably connected to the inner wall of the top slide 201, a reset spring 206 is fixed to one side of the top protrusion of the residual ring 202, one end of the reset spring 206 is fixed to the inner wall of the dispensing valve body 1, and a square ring groove 20 is provided on the inner wall of the bottom end of the dispensing valve body 1 3. The inner wall of the square ring groove 203 is provided with a ring groove part 204, and the inner wall of the ring groove part 204 is slidably connected with a transmission ring 207. The bottom end of the transmission ring 207 is provided with a ring pull groove 208 in a circumferential array. The inner wall of the ring pull groove 208 is meshed with a driving gear 2012. The driving gear 2012 is driven by a motor, and the motor is arranged inside the dispensing valve body 1. The top circumferential array of the transmission ring 207 is fixed with a fixed tooth 2011. The surface of the ring groove part 204 is fixed with a circular groove ring part 205. The circumferential surface of the circular groove ring part 205 is rotatably connected with an auxiliary ring 209. The inner wall of the auxiliary ring 209 is provided with rifling, and the circumferential surface of the auxiliary ring 209 is fixed with a residual push circle 2010. In the dispensing production, especially in the system using a piezoelectric dispensing valve, The glue output is usually directly related to the diameter of the glue dispensing head, which means that once the glue dispensing head is selected, its diameter is fixed, thereby limiting the adjustability of the glue output. Since the piezoelectric glue dispensing valve relies on the precise control of the tiny deformation produced by the piezoelectric material to achieve accurate fluid injection, if the diameter of the glue dispensing head that determines the glue output cannot be changed, then in different production processes that require different glue outputs, the applicability and flexibility of the equipment will be significantly limited, reducing the scope of application of the equipment. The solution is to install the residual ring 202, so that when the staff needs to reduce the glue output, the staff can start the motor, and the motor engages to drive the transmission ring 207 to rotate, so that the fixed tooth 2011 moves along the auxiliary ring The rifling of 209 slides, and the existence of the rifling causes the auxiliary ring 209 to rotate, rotating the residual push circle 2010 to the residual ring part 202, squeezing the residual ring part 202 out of the arc slide groove 2, and multiple residual ring parts 202 are gathered and pieced together to reduce the diameter of the inner wall of the bottom end of the fixed glue bin 104, thereby reducing the glue output of the equipment. At the same time, when the staff needs to restore the glue output, the motor is started again to make the auxiliary ring 209 continue to rotate, and the residual push circle 2010 leaves the residual ring part 202, and the reset spring 206 releases the elastic potential energy, pulling the residual ring part 202 back to the arc slide groove 2, restoring the diameter of the inner wall of the bottom end of the fixed glue bin 104, making it convenient for the staff to adjust the glue output, thereby achieving the effect of improving the application range of the equipment.The top of the fixed tooth 2011 is set as a round head. Since the auxiliary ring 209 rotates through the sliding of the inner wall rifling and the fixed tooth 2011, the rifling will be worn out after long-term use. Since the auxiliary ring 209 is sleeved on the circular groove ring 205, it is difficult to disassemble and replace, which will greatly increase the subsequent maintenance costs and time, and increase the production cost. The round head is used to solve the problem. By setting the top of the fixed tooth 2011 as a round head, the wear of the inner wall rifling of the auxiliary ring 209 is greatly reduced, so as to improve the service life of the equipment and reduce the production cost. The diameter of the circle formed by the multiple residual rings 202 is greater than the diameter of the pressure head 106, which prevents the residual rings 202 from rubbing against the pressure head 106 and improves the service life of the equipment. The length of the square groove 203 and the height of the square groove 203 are greater than the sum of the height of the residual push circle 2010, the diameter of the circular groove ring 205 and the diameter of the auxiliary ring 209, which prevents the residual push circle 2010 from scratching the inner wall of the square groove 203 and improves the service life of the equipment. The surface of the residual ring 202 is covered with a rubber layer, which increases the friction between the residual ring 202 and the residual ring 202 and improves the stability of the equipment.

[0028] A limiting circle 103 is fixed on the circumference of the glue rod 105. The diameter of the limiting circle 103 is larger than the inner diameter of the glue bin 104. When the piezoelectric material deforms abnormally, causing the glue rod 105 to drop excessively, the pressure head 106 will hit the bottom of the equipment, causing damage to the equipment and reducing the service life of the equipment. The problem is solved by installing the limiting circle 103. When the piezoelectric material deforms abnormally, the limiting circle 103, due to its diameter being larger than the inner diameter of the glue bin 104, prevents the glue rod 105 from falling beyond the designed distance through mechanical collision. When the glue rod 105 falls, due to the large diameter of the limiting circle 103, the contact area with the glue is large, and the resistance is greatly increased, which limits the descending speed of the glue rod 105, prevents component damage, and achieves the effect of increasing the service life of the equipment. A rubber front face 101 is fixed on the front of the dispensing valve body 1 to reduce the impact of collision during transportation and stacking, prevent equipment damage, and improve the yield rate.

[0029] The working principle of the utility model is as follows: when the staff needs to reduce the glue output, the staff can start the motor, and the motor meshing drives the transmission ring 207 to rotate, so that the fixed tooth 2011 slides along the rifling of the auxiliary ring 209. Due to the existence of the rifling, the auxiliary ring 209 rotates, and the residual push circle 2010 is rotated to the residual ring part 202, and the residual ring part 202 is squeezed out of the arc slide groove 2. Multiple residual ring parts 202 are gathered and pieced together to reduce the diameter of the inner wall of the bottom end of the fixed glue bin 104, thereby reducing the glue output of the equipment. At the same time, when the staff needs to restore the glue output, the motor is started again to make the auxiliary ring 209 continue to rotate, and the residual push circle 2010 leaves the residual ring part 202. The reset spring 206 releases the elastic potential energy, pulls the residual ring part 202 back to the arc slide groove 2, and restores the diameter of the inner wall of the bottom end of the fixed glue bin 104.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A quantitatively adjustable glue dispensing valve, comprising a glue dispensing valve body (1), wherein the inner wall of the glue dispensing valve body (1) is provided with a glue channel (102), the inner wall of the glue channel (102) is slidably connected with a glue pressing rod (105), a pressure head (106) is fixed at the bottom of the glue pressing rod (105), and a glue fixed bin (104) is fixed at the bottom end of the inner wall of the glue channel (102), characterized in that: The bottom inner wall of the glue dispensing bin (104) is provided with an arc groove (2), the top of the arc groove (2) is provided with a top groove (201), the inner wall of the arc groove (2) is slidably connected with a residual ring member (202), the top protrusion of the residual ring member (202) is slidably connected with the inner wall of the top groove (201), a return spring (206) is fixed to one side of the top protrusion of the residual ring member (202), one end of the return spring (206) is fixed to the inner wall of the glue dispensing valve body (1), the bottom inner wall of the glue dispensing valve body (1) is provided with a square ring groove (203), the inner wall of the square ring groove (203) is provided with a ring groove member (204), the inner wall of the ring groove member (204) is slidably connected with A transmission ring (207), wherein a ring-pushing groove (208) is provided in a circumferential array at the bottom end of the transmission ring (207), and a driving gear (2012) is meshed on the inner wall of the ring-pushing groove (208). The driving gear (2012) is driven by a motor, and the motor is arranged inside the dispensing valve body (1). A fixed tooth (2011) is fixed in a circumferential array at the top end of the transmission ring (207), and a circular groove ring member (205) is fixed on the surface of the ring groove member (204). The circumferential surface of the circular groove ring member (205) is rotatably connected to an auxiliary ring (209), and the inner wall of the auxiliary ring (209) is provided with rifling, and a residual push circle (2010) is fixed on the circumferential surface of the auxiliary ring (209).

2. The quantitatively adjustable dispensing valve according to claim 1, characterized in that: A limiting circle (103) is fixed on the circumference of the glue pressing rod (105), and the diameter of the limiting circle (103) is larger than the inner diameter of the glue fixing bin (104).

3. The quantitatively adjustable dispensing valve according to claim 1, characterized in that: The top end of the fixed tooth (2011) is configured as a round head.

4. The quantitatively adjustable dispensing valve according to claim 1, characterized in that: The diameter of the circle formed by the plurality of residual rings (202) is greater than the diameter of the pressure head (106).

5. The quantitatively adjustable dispensing valve according to claim 1, characterized in that: A rubber front face (101) is fixed on the front of the dispensing valve body (1).

6. The quantitatively adjustable dispensing valve according to claim 1, characterized in that: The length of the square annular groove (203) and the height of the square annular groove (203) are greater than the sum of the height of the residual push circle (2010), the diameter of the circular groove ring (205) and the diameter of the auxiliary ring (209).

7. The quantitatively adjustable dispensing valve according to claim 1, characterized in that: The surface of the residual ring (202) is coated with a rubber layer.

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