Adaptive glue dispensing desktop automatic glue dispenser

Abstract

This invention discloses an adaptive desktop automatic dispensing machine, relating to the field of dispensing manufacturing technology. It includes an operating table and an outer frame placed on the operating table. A dispensing module is mounted on the outer frame, along with a control module and an adjustment module that cooperate with the dispensing module. A placement platform is fixedly mounted on the outer frame. The dispensing module consists of a dispensing head and a dispensing tube. The advantages are: this invention, through the mechanical adaptive coordination of a pressure compensation mechanism, a resistance adjustment mechanism, a mixing mechanism, and a transmission structure, combined with pre-treatment by a front-end bubble remover and pressure regulator, stabilizes the dispensing pressure from the source, adjusts the flow resistance in real time, and ensures uniform glue state. This completely solves problems such as trailing, stringing, glue splattering, pressure overshoot, and component wear. It achieves high-precision and stable dispensing without electrical control, featuring a compact structure, fast response, and high reliability, significantly improving the accuracy, consistency, and service life of the desktop dispensing machine.

Description

Technical Field

[0001] This invention relates to the field of dispensing manufacturing technology, and more particularly to an adaptive desktop automatic dispensing machine. Background Technology

[0002] With the increasing demands for precision and consistency in adhesive application in industries such as electronic packaging and precision assembly, desktop automatic dispensing machines have become key equipment in automated production. Currently, the mainstream time-pressure type dispensing machines mainly adjust the dispensing volume by regulating the air supply pressure and valve opening time. However, traditional dispensing controllers use an open-loop air pressure control mode, controlling the dispensing volume solely by preset air pressure values ​​and valve opening times.

[0003] Conventional dispensing machines use vertically positioned dispensing needles, limiting their application to areas with ample space on PCBs. If electronic components are thick or tall, the existing needles, limited to vertical movement, cannot effectively dispense adhesive to the dead zones where the components meet the PCB, severely impacting dispensing quality. Therefore, CN102335646B discloses a dispensing machine head mechanism comprising a head mounting base, a lifting base, and a corner dispensing device. The head mounting base is equipped with a slide rail, which movably mounts a lifting slider. The lifting base is connected to the lifting slider. The machine also includes a rotating base, a main shaft, and a rotary drive mechanism for rotating the main shaft. The main shaft is rotatably mounted on the lifting base, and the rotating base is connected to the lower part of the main shaft. The corner dispensing device is mounted on the rotating base.

[0004] When the dispensing head mechanism of the above-mentioned dispensing machine dynamically adjusts the dispensing volume, the internal flow channel of the dispensing head will generate violent alternating pressure fluctuations and instantaneous high pressure. After the dispensing is turned off, the residual high pressure in the dispensing head and pipeline cannot be released quickly. The adhesive continues to seep out under continuous pressure, resulting in obvious trailing, stringy adhesion or dripping after dispensing. The adhesive shape is difficult to control accurately, which seriously affects the product appearance and assembly accuracy.

[0005] During equipment start-up and shutdown, and deceleration at path corners, instantaneous high pressure causes the adhesive to flow too fast, which can easily lead to excessive adhesive buildup and thick adhesive lines in local areas. On straight high-speed sections, the impact of the adhesive flow causes unstable adhesive shape and fluctuations in thickness, making it impossible to meet the requirements for continuous and uniform adhesive application. Under high pressure, the adhesive is sprayed out at a high speed, which can easily cause splashing, overflow, and lateral seepage after impacting the workpiece surface. This not only contaminates the surrounding non-dispensing areas but also causes the dispensing position to shift and the adhesive dots to spread, significantly reducing the dispensing positioning accuracy.

[0006] During the dispensing adjustment process, if the pressure and flow rate rise too quickly, overshoot and oscillation are likely to occur. Traditional open-loop control relies only on preset parameters and cannot detect and correct pressure fluctuations in real time, resulting in the actual dispensing volume frequently deviating from the set value, making it difficult to achieve high-precision and stable quantitative dispensing.

[0007] Therefore, a new type of adaptive glue dispensing desktop automatic dispensing machine can be used to address the shortcomings of existing technologies. Summary of the Invention

[0008] The purpose of this invention is to solve the problems existing in the prior art by proposing an adaptive glue dispensing desktop automatic dispensing machine.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] An adaptive glue dispensing desktop automatic dispensing machine includes an operating table and an outer frame placed on the operating table;

[0011] The outer frame is equipped with a dispensing module, and also with a control module and an adjustment module that work with the dispensing module. A storage platform is fixedly installed on the outer frame.

[0012] The dispensing module consists of a dispensing head and a dispensing tube, and the dispensing module also includes an X-axis adjustment component, a Y-axis adjustment component, and a Z-axis adjustment component for adjusting the position of the dispensing head.

[0013] The dispensing head includes a dispensing tube that is fixedly connected to the dispensing tube via a connector. A spray nozzle is fixedly connected to the dispensing tube. The dispensing tube is connected to the Z-axis adjustment assembly via a fixing bracket. The dispensing tube is equipped with a resistance adjustment mechanism, a pressure compensation mechanism, and a mixing mechanism. The pressure compensation mechanism is used to adjust the internal pressure of the dispensing tube. The resistance adjustment mechanism is used to change the flow resistance of the adhesive inside the dispensing tube. The mixing mechanism is used to perform final stirring and mixing of the adhesive to be sprayed.

[0014] Preferably, a pressure regulator is fixedly connected to the end of the dispensing tube away from the connector, and an air bubble remover is fixedly connected to the end of the pressure regulator away from the dispensing tube.

[0015] Preferably, the pressure compensation mechanism includes a second frame fixedly installed inside the dispensing tube, and a first frame slidably installed inside the dispensing tube. A metal elastic diaphragm cylinder is fixedly installed between the first frame and the second frame, and a fixing plate is fixedly installed on the first frame.

[0016] Preferably, the resistance adjustment mechanism includes a base rotatably mounted on a second frame, the base having multiple through holes, a rotating seat rotatably mounted on the base, and multiple thin plates jointly mounted between the rotating seat and the base, one end of each thin plate being fixedly connected to the base and the other end being fixedly connected to the rotating seat, and a driving structure being mounted between the fixed plate and the rotating seat.

[0017] Preferably, the drive structure includes a mechanical seal ring that is rotatably mounted through a fixed plate, a push-pull rod that is fixedly mounted on the mechanical seal ring, a disc that is fixedly mounted on the push-pull rod, a plurality of elastic telescopic rods that are fixedly mounted on the disc, the telescopic ends of the plurality of elastic telescopic rods being fixedly connected to the base, a semi-helical rod that is fixedly mounted on the disc, and a helical groove that cooperates with the semi-helical rod being provided on the rotating seat.

[0018] Preferably, the mixing mechanism includes a third frame fixedly installed inside the dispensing tube, a friction ring rotatably mounted on the third frame, a cylinder fixedly mounted on the friction ring, a plurality of rotating shafts rotatably mounted on the cylinder, each rotating shaft penetrating and extending into the cylinder, and a mixing blade fixedly mounted at one end of each rotating shaft outside the cylinder, and a spring coil fixedly mounted between each rotating shaft and the cylinder, and the friction ring and the push-pull rod being connected by a transmission structure.

[0019] Preferably, the transmission structure includes a push rod fixedly installed at the end of the push-pull rod, a push ring slidably installed on the push rod, a return spring fixedly installed between the push ring and the push-pull rod, multiple columns installed on the third frame, a friction block slidably installed on each column to cooperate with the friction ring, the push ring and the multiple friction blocks being connected by a contraction structure, and an adjustment component installed between the push rod and the multiple rotating shafts.

[0020] Preferably, the retraction structure includes a plurality of swing arms rotatably mounted on the push ring, and each swing arm is rotatably connected to a corresponding friction block.

[0021] Preferably, the adjusting component includes a push plate fixedly mounted on the push rod, and a plurality of friction plates are fixedly mounted on the push plate. Each of the rotating shafts is fixedly mounted with a friction disc that cooperates with the corresponding friction plate.

[0022] Preferably, the inner wall of the glue injection tube is provided with a plurality of sliding grooves that cooperate with the first frame, and a spring rod is fixedly installed between the first frame and each sliding groove.

[0023] Compared with existing technologies, the advantages of this invention are:

[0024] 1. This invention incorporates a pressure compensation mechanism within the dispensing tube. Utilizing the synergistic effect of the first frame, the second frame, and the metal elastic diaphragm cylinder, it automatically deforms according to internal pressure fluctuations caused by changes in dispensing volume. This real-time compensation of the flow channel space stabilizes the internal pressure, suppressing alternating high pressure and pressure overshoot at the source. The metal elastic diaphragm cylinder contracts and expands under high pressure and retracts and increases pressure under low pressure. Combined with a spring rod, it achieves bidirectional adaptive buffering, responding quickly to pressure changes without electrical control. This effectively prevents residual pressure retention after dispensing is stopped, completely resolving defects such as tailing, stringing, and dripping. Simultaneously, it reduces damage to the valve body from pressure shocks, improving dispensing stability and component lifespan.

[0025] 2. This invention integrates a resistance adjustment mechanism, which, through a base, rotating seat, thin plate, semi-spiral rod, and push-pull rod, forms a mechanical linkage adjustment structure. This mechanism automatically changes the flow area and flow resistance of the colloid channel according to the displacement of the pressure compensation mechanism, achieving real-time adaptive matching of dispensing resistance. When the dispensing volume increases and the pressure rises, the thin plate twists to widen the gap and reduce resistance, preventing excessive flow rate. When the dispensing volume decreases and the pressure drops, the resistance adjustment mechanism synchronously adjusts the flow channel to prevent excessively slow flow rate. This precisely matches the dispensing requirements of different working conditions such as start-up, corners, and straight sections, eliminating problems such as glue accumulation, uneven glue line thickness, and splashing, significantly improving the accuracy of glue shape control.

[0026] 3. This invention incorporates a mixing mechanism inside the dispensing head. Utilizing a cylinder, rotating shaft, mixing blades, friction ring, friction block, friction disc, and friction plate, it forms an adaptive stirring and angle adjustment structure. This allows for dynamic homogenization and stirring before the adhesive is sprayed, eliminating adhesive stratification, residual air bubbles, and uneven viscosity. Simultaneously, through mechanical transmission via push-pull rods, push rods, and push plates, the angle of the mixing blades can be automatically adjusted according to the dispensing pressure and flow rate, optimizing the adhesive flow state. This ensures uniform mixing without generating additional resistance or impact, further improving dispensing consistency and positioning accuracy, and preventing adhesive seepage and contamination of surrounding areas.

[0027] 4. This invention employs a purely mechanical adaptive transmission structure. Through push-pull rods, push rings, swing arms, return springs, friction rings, and friction blocks, it achieves synchronous linkage of the three major mechanisms: pressure, resistance, and mixing. It eliminates the need for sensors, controllers, and drive motors; relying entirely on fluid pressure and mechanical transmission, it completes the entire process of adaptive adjustment, significantly reducing control complexity and the risk of failure. This transmission structure offers rapid response, no lag, and no overshoot, enabling real-time correction of dispensing pressure and flow rate fluctuations. It solves the problem of traditional open-loop control's inability to correct these fluctuations in real time, ensuring that the actual dispensing volume strictly matches the set value and improving dispensing repeatability and stability.

[0028] 5. This invention equips the dispensing hose with an air bubble remover and a pressure regulator, pre-treating the adhesive by removing bubbles and stabilizing pressure. Combined with the pressure compensation, resistance adjustment, and mixing and stirring functions within the dispensing head, a dual-layer pressure and flow stabilization system is formed, combining pre-treatment and internal self-adaptation. This provides dual protection for dispensing stability from both the supply and execution ends. The air bubble remover eliminates air bubbles within the adhesive, preventing intermittent and voided dispensing. The pressure regulator buffers pressure fluctuations from the air source and pump, reducing the pressure regulation load within the dispensing head, minimizing high-pressure wear on components such as seals and valve seats, preventing internal leakage and backflow, and extending the overall machine's service life and maintenance cycle. Attached Figure Description

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of the structure of an adaptive glue dispensing desktop automatic dispensing machine proposed in this invention;

[0031] Figure 2 for Figure 1 Detailed schematic diagram of the structure after rotation at a certain angle;

[0032] Figure 3 for Figure 2 Detailed schematic diagram of the structure after rotation at a certain angle;

[0033] Figure 4 for Figure 2 Detailed enlarged structural diagram of the dispensing module;

[0034] Figure 5 for Figure 4 Detailed schematic diagram of the structure after rotation at a certain angle;

[0035] Figure 6 for Figure 5 Detailed schematic diagram of the structure after removing part of the shell and rotating it at a certain angle;

[0036] Figure 7 for Figure 6 Detailed schematic diagram of the structure after rotation at a certain angle;

[0037] Figure 8 for Figure 7 Detailed enlarged structural diagram of the center-ejector nozzle;

[0038] Figure 9 for Figure 8 Detailed schematic diagram of the structure after rotation at a certain angle;

[0039] Figure 10 for Figure 9 Detailed schematic diagram of the structure after cutting open the dispensing tube and rotating it at a certain angle;

[0040] Figure 11 for Figure 10 Enlarged schematic diagram of the midpoint adhesive tube and other internal components;

[0041] Figure 12 for Figure 11 Detailed schematic diagram of the structure after removing the dispensing tube and rotating it at a certain angle;

[0042] Figure 13 for Figure 12 Detailed schematic diagram of the structure after rotation at a certain angle;

[0043] Figure 14 for Figure 13 Detailed schematic diagram of the structure after cutting open the metal elastic diaphragm tube and rotating it at a certain angle;

[0044] Figure 15 for Figure 14 Detailed schematic diagram of the structure after rotation at a certain angle;

[0045] Figure 16 for Figure 15 A detailed enlarged structural diagram of the metal elastic diaphragm tube after removing the resistance adjustment mechanism, the metal elastic diaphragm tube, and other internal components of the metal elastic diaphragm tube.

[0046] Figure 17 for Figure 16 Detailed schematic diagram of the structure after rotation at a certain angle;

[0047] Figure 18 for Figure 17 Detailed schematic diagram of the structure after removing the shrinkage structure and cutting open the cylinder;

[0048] Figure 19 for Figure 18 Detailed diagram of the enlarged structure of section A.

[0049] In the diagram: 1. Control panel, 2. Outer frame, 3. Control module, 4. Adjustment module, 5. Dispensing module, 6. Storage platform, 7. Air bubble remover, 8. Pressure regulator, 9. Dispensing head, 10. X-axis adjustment assembly, 11. Y-axis adjustment assembly, 12. Dispensing hose, 13. Z-axis adjustment assembly, 14. Dispensing hose, 15. Fixing frame, 16. Connector, 17. Spray nozzle, 18. Resistance adjustment mechanism, 19. Pressure compensation mechanism, 20. Transmission structure, 21. Mixing mechanism, 22. First frame, 2 3 Second frame, 24 Metal elastic membrane cylinder, 25 Third frame, 26 Fixed plate, 27 Thin sheet, 28 Base, 29 Semi-helical rod, 30 Elastic telescopic rod, 31 Retractable structure, 32 Mixing blade, 33 Push-pull rod, 34 Disc, 35 Rotating seat, 36 Friction ring, 37 Friction block, 38 Rotating ring, 39 Push rod, 40 Pushing ring, 41 Cylinder, 42 Swing rod, 43 Return spring, 44 Push plate, 45 Friction plate, 46 Rotating shaft, 47 Friction disc. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Example 1: Refer to Figures 1-7 An adaptive glue dispensing desktop automatic dispensing machine includes an operating table 1 and an outer frame 2 placed on the operating table 1;

[0052] An adhesive dispensing module 5 is installed on the outer frame 2, and a control module 3 and an adjustment module 4 that cooperate with the adhesive dispensing module 5 are also installed on the outer frame 2. A storage platform 6 is fixedly installed on the outer frame 2.

[0053] The control panel 1 provides a stable support foundation for the entire equipment, ensuring that the equipment does not shake or shift during operation. The outer frame 2 serves as the core load-bearing structure, used to install and fix the control module 3, adjustment module 4, dispensing module 5, and placement platform 6, forming an integrated structure. The positions of each component are relatively fixed and the fit is precise, avoiding assembly gaps and displacement deviations during operation, improving the overall rigidity and operational stability of the equipment, and providing a reliable structural guarantee for high-precision dispensing.

[0054] The control module 3 receives instructions and coordinates the actions of each module to achieve automated control of the dispensing process. The adjustment module 4 is used to initially adjust the pressure and flow of the adhesive, laying the foundation for fine adjustment of the dispensing head 9. The dispensing module 5 executes the dispensing action. The placement platform 6 is used to stably place the workpiece to be dispensed, ensuring the workpiece's levelness and positioning accuracy. The four modules are arranged in an orderly manner on the outer frame 2, with a reasonable spatial layout and no interference between them, realizing the integration of control, adjustment, execution, and load-bearing functions, improving the equipment's integration and ease of operation.

[0055] The end of the glue injection tube 12 away from the connector 16 is fixedly connected to a pressure regulator 8, and the end of the pressure regulator 8 away from the glue injection tube 12 is fixedly connected to a bubble remover 7.

[0056] The bubble remover 7 first degasses the colloid entering the pipeline, removing air bubbles inside the colloid to avoid problems such as dispensing interruptions, voids, and splashing during dispensing. The pressure regulator 8 initially stabilizes the pressure of the degassed colloid, buffering pressure fluctuations in the pump and preventing sudden pressure changes from being directly transmitted to the dispensing head 9. The two work together to achieve pre-treatment of the colloid by first degassing and then stabilizing the pressure, reducing the load on the downstream adaptive adjustment and improving the overall dispensing stability and uniformity.

[0057] The dispensing module 5 consists of a dispensing head 9 and a dispensing tube 12, and the dispensing module 5 also includes an X-axis adjustment component 10, a Y-axis adjustment component 11 and a Z-axis adjustment component 13 for adjusting the position of the dispensing head 9.

[0058] The X-axis adjustment assembly 10, Y-axis adjustment assembly 11, and Z-axis adjustment assembly 13 work together to achieve precise displacement of the dispensing head 9 in three-dimensional space. The coordinates of the nozzle 17 can be flexibly adjusted according to the dispensing path and workpiece position to ensure accurate dispensing position. The dispensing tube 12 is responsible for stable delivery of the adhesive, and the dispensing head 9 completes the final dispensing action. The three-axis adjustment and dispensing execution structure work together to meet the dispensing needs of different positions, heights, and paths, improving the equipment's versatility and dispensing accuracy.

[0059] Example 2: This example differs from Example 1 in that: (Refer to...) Figures 8-19 The dispensing head 9 includes a dispensing tube 14 that is fixedly connected to the dispensing tube 12 via a connector 16. A spray nozzle 17 is fixedly connected to the dispensing tube 14. The dispensing tube 14 is connected to the Z-axis adjustment assembly 13 via a fixing bracket 15. The dispensing tube 14 is equipped with a resistance adjustment mechanism 18, a pressure compensation mechanism 19, and a mixing mechanism 21. The pressure compensation mechanism 19 is used to adjust the internal pressure of the dispensing tube 14, the resistance adjustment mechanism 18 is used to change the flow resistance of the colloid inside the dispensing tube 14, and the mixing mechanism 21 is used to perform final stirring and mixing of the colloid to be sprayed.

[0060] The connector 16 ensures a sealed connection between the dispensing tube 12 and the glue tube 14 to prevent glue leakage. The fixing bracket 15 securely connects the glue tube 14 to the Z-axis adjustment component 13 to ensure precise and stable displacement of the glue head 9. The spray nozzle 17 controls the shape and flow rate of the glue spray. The resistance adjustment mechanism 18, the pressure compensation mechanism 19, and the mixing mechanism 21 are integrated inside the glue tube 14. The three mechanisms work together coaxially and in conjunction to achieve adaptive pressure stability, adaptive resistance adjustment, and adaptive glue homogenization, respectively. No external drive is required. The purely mechanical structure has a fast response and high reliability, completely solving a series of problems caused by unstable pressure from the glue dispensing end.

[0061] The pressure compensation mechanism 19 includes a second frame 23 fixedly installed inside the dispensing tube 14, and a first frame 22 slidably installed inside the dispensing tube 14. A metal elastic diaphragm cylinder 24 is fixedly installed between the first frame 22 and the second frame 23. A fixing plate 26 is fixedly installed on the first frame 22.

[0062] The second frame 23 is fixed and provides a support reference. The first frame 22 can slide along the inner wall of the dispensing tube 14. The metal elastic diaphragm tube 24 deforms elastically under internal pressure. Under high pressure, it contracts to increase the flow channel space and reduce pressure. Under low pressure, it rebounds to reduce the flow channel space and increase pressure. The fixed plate 26 is used to transmit displacement power and drive the subsequent mechanism to move synchronously. This structure uses fluid pressure to drive elastic deformation, realizes passive adaptive pressure compensation, quickly balances the pressure in the cavity, suppresses pressure overshoot and fluctuation, and avoids residual pressure causing tailing of dispensing.

[0063] The resistance adjustment mechanism 18 includes a base 28 rotatably mounted on the second frame 23. The base 28 has multiple through holes. A rotating seat 35 is rotatably mounted on the base 28. Multiple thin plates 27 are installed between the rotating seat 35 and the base 28. One end of the thin plate 27 is fixedly connected to the base 28, and the other end is fixedly connected to the rotating seat 35. A drive structure is installed between the fixing plate 26 and the rotating seat 35.

[0064] The relative rotation of the base 28 and the rotating seat 35 can cause the thin sheet 27 to twist, changing the spacing of the thin sheet 27 and the flow area of ​​the channel, thereby adjusting the flow resistance of the colloid. The through hole ensures that the colloid passes through smoothly. The drive structure receives the displacement power of the pressure compensation mechanism 19 and drives the rotating seat 35 to rotate precisely, realizing the synchronous adaptive adjustment of resistance with pressure. Under high pressure, the resistance is reduced to avoid the flow rate being too fast, and under low pressure, the resistance is increased to prevent the flow rate from being too slow, accurately matching the dispensing requirements of different working conditions and stabilizing the colloid shape and dispensing volume.

[0065] The drive structure includes a mechanical seal ring that is rotatably mounted on a fixed plate 26. A push-pull rod 33 is fixedly mounted on the mechanical seal ring. A disc 34 is fixedly mounted on the push-pull rod 33. Multiple elastic telescopic rods 30 are fixedly mounted on the disc 34. The telescopic ends of the multiple elastic telescopic rods 30 are fixedly connected to the base 28. A semi-helical rod 29 is fixedly mounted on the disc 34. A helical groove that cooperates with the semi-helical rod 29 is opened on the rotating seat 35.

[0066] The mechanical seal ring ensures that the push-pull rod 33 is leak-proof when it rotates. The push-pull rod 33 transmits linear displacement. The semi-helical rod 29 and the helical groove cooperate to convert the linear motion into the rotational motion of the rotating seat 35. The elastic telescopic rod 30 provides elastic buffer and restoring force to ensure smooth transmission without jamming. The disc 34 is used to fix the semi-helical rod 29 and the elastic telescopic rod 30. This transmission conversion is precise and responsive, and achieves seamless linkage between pressure compensation and resistance adjustment. It can complete adaptive adjustment without electrical control.

[0067] The mixing mechanism 21 includes a third frame 25 fixedly installed inside the dispensing tube 14. A friction ring 36 is rotatably mounted on the third frame 25. A cylinder 41 is fixedly mounted on the friction ring 36. Multiple rotating shafts 46 are rotatably mounted on the cylinder 41. Each rotating shaft 46 passes through and extends into the cylinder 41. A mixing blade 32 is fixedly mounted at one end of each rotating shaft 46 located outside the cylinder 41. A spring coil is fixedly mounted between each rotating shaft 46 and the cylinder 41. The friction ring 36 is connected to the push-pull rod 33 through a transmission structure 20.

[0068] The third frame 25 provides fixed support for the mixing mechanism 21. The friction ring 36 rotates under the action of the transmission structure 20, driving the cylinder 41 to rotate. The mixing blades 32 rotate with the cylinder 41 to stir and homogenize the colloid, eliminating the colloid stratification and viscosity unevenness. The rotating shaft 46 cooperates with the spring coil to adjust the angle of the mixing blades 32 to adapt to different flow rates and pressure conditions. While stirring, the flow state is optimized to ensure that the colloid is sprayed out evenly and stably, improving the dispensing quality and position accuracy.

[0069] The transmission structure 20 includes a push rod 39 fixedly installed at the end of the push-pull rod 33, a push ring 40 slidably installed on the push rod 39, a return spring 43 fixedly installed between the push ring 40 and the push-pull rod 33, and multiple columns installed on the third frame 25 (installed via a rotating ring 38, with the rotating ring 38 rotatably connected to the third frame 25). Each column has a friction block 37 slidably installed on it that cooperates with the friction ring 36, and the push ring 40 is connected to the multiple friction blocks 37 via a contraction structure 31.

[0070] Push rod 39 moves synchronously with push-pull rod 33, push ring 40 cooperates with return spring 43 to transmit power and provide buffer, column provides sliding guide for friction block 37, friction block 37 contacts or separates from friction ring 36 under the action of contraction structure 31, controls the start and stop and speed of mixing mechanism 21, this transmission structure 20 transmits pressure and resistance adjustment actions synchronously to mixing mechanism 21, realizes the coordinated action of the three mechanisms, ensures that the adaptive adjustment is synchronous and consistent throughout the process, without lag or deviation.

[0071] The retractable structure 31 includes a plurality of rocker arms 42 rotatably mounted on the push ring 40, and each rocker arm 42 is rotatably connected to the corresponding friction block 37;

[0072] When the push ring 40 moves, the swing rod 42 swings, converting the linear motion of the push ring 40 into the radial movement of the friction block 37, controlling the friction block 37 to clamp or loosen the friction ring 36, thereby realizing the engagement and disengagement of the friction transmission. This structure has direct transmission and reliable operation, can quickly respond to the displacement signal of the push rod 33, accurately control the working state of the mixing mechanism 21, and ensure that the mixing action is synchronized with the pressure and resistance adjustment.

[0073] An adjustment component is installed between the push rod 39 and multiple rotating shafts 46. The adjustment component includes a push plate 44 fixedly installed on the push rod 39. Multiple friction plates 45 are fixedly installed on the push plate 44. Each rotating shaft 46 is fixedly installed with a friction disc 47 that cooperates with the corresponding friction plate 45.

[0074] The push plate 44 moves with the push rod 39, causing the friction plate 45 to shift. When the friction plate 45 contacts the friction disk 47, friction is generated, which drives the rotating shaft 46 to rotate, thereby changing the angle of the mixing blade 32 and adjusting the flow of the colloid and the stirring intensity. This adjustment component does not require independent drive and is automatically adjusted based on pressure changes. It can dynamically optimize the posture of the mixing blade 32 according to the dispensing pressure and flow rate, improve the uniformity and flow stability of the colloid, and avoid splashing, overflow and seepage.

[0075] The inner wall of the dispensing tube 14 is provided with multiple sliding grooves that cooperate with the first frame 22, and a spring rod is fixedly installed between the first frame 22 and each sliding groove;

[0076] The sliding groove provides precise sliding guidance for the first frame 22, ensuring its smooth axial movement without radial offset or jamming. The spring rod provides elastic restoring force and buffering force, pushing the first frame 22 to reset when the pressure decreases, causing the metal elastic diaphragm cylinder 24 to rebound and increase pressure, while absorbing pressure impact vibration. This structure further improves the pressure compensation response speed and stability, ensures accurate and reliable pressure regulation, and extends the service life of the mechanism.

[0077] The specific operating steps of this device are as follows:

[0078] First, place the object to be coated with adhesive on the platform 6 and adjust it to keep it level. Then, start the external pump through the control module 3 to deliver the adhesive to the air bubble remover 7 to remove air bubbles from the adhesive. Then, the adhesive will enter the pressure regulator 8 in the adjustment module 4 for pressure adjustment (the pump can also be pressure adjusted. By increasing the pump power, the delivery volume is increased, and the pressure is increased. The purpose of setting the pressure regulator 8 is to avoid frequent frequency conversion and extend the service life of the pump).

[0079] The pressure regulator 8 delivers the adhesive through the dispensing tube 12 to the dispensing tube 14, and then sprays it out through the nozzle 17 to coat the surface of the object. During the process, the nozzle 17 is adaptively adjusted by the X-axis adjustment component 10, the Y-axis adjustment component 11 and the Z-axis adjustment component 13.

[0080] Because the dwell time at the glue-applying corners is long, the glue dispensing amount needs to be reduced. Furthermore, the glue application on some object surfaces requires non-uniform application, necessitating dynamic adjustment of the glue dispensing amount. Increasing the glue dispensing amount increases the internal pressure of the dispensing tube 14, while decreasing the dispensing amount decreases the internal pressure. This causes pressure fluctuations, affecting the glue dispensing quality. Therefore, when the glue is inside the dispensing tube 14, the following adaptive regulation occurs:

[0081] When the amount of glue dispensed increases, the internal pressure of the dispensing tube 14 increases: the metal elastic diaphragm 24 in the pressure compensation mechanism 19 will be concave and contracted in the middle to compensate for the internal space of the dispensing tube 14. After the concave, the internal space of the dispensing tube 14 increases and the pressure decreases.

[0082] Simultaneously, the contraction of the metal elastic diaphragm cylinder 24 will cause the first frame 22 to move towards the side closer to the second frame 23 inside the dispensing tube 14, while the second frame 23 remains stationary. Therefore, the semi-spiral rod 29 will undergo relative displacement with the rotating seat 35. Under the action of the semi-spiral rod 29 and the spiral groove on the rotating seat 35, the rotating seat 35 will be driven to rotate, thereby causing the thin sheet 27 to twist. This will increase the distance between two adjacent thin sheets 27 and reduce the flow resistance of the colloid (in the initial state, the thin sheet 27 is at a certain tilt angle). The elastic telescopic rod 30 contracts. At the same time, as the colloid flows from the dispensing tube 14 to the spray nozzle 17, it will pass through the mixing blade 32, causing the mixing blade 32 to rotate and stir the colloid, making the distribution of each substance in the colloid more uniform.

[0083] When the glue dispensing volume decreases, the internal pressure of the dispensing tube 14 decreases. At this time, the metal elastic diaphragm cylinder 24 expands in the opposite direction, reducing the glue flow space inside the dispensing tube 14, thereby achieving the purpose of pressurization (because the dispensing tube 14 has a certain internal pressure when dispensing, the metal elastic diaphragm cylinder 24 is initially in a certain concave state). At this time, the first frame 22 moves in the opposite direction (this reversal is opposite to the direction of movement of the first frame 22 when the glue dispensing volume increases, that is, it moves away from the second frame 23). The elastic telescopic rod 30 extends, and the fixed plate 26 drives the push-pull rod 33 to move, thereby driving the push rod 39 to move, and through... The return spring 43 drives the push ring 40 to move. The movement of the push ring 40 will cause the friction block 37 to slide on the column through the rocker arm 42 until the friction block 37 abuts against the friction ring 36 (initially, the friction block 37 does not contact the friction ring 36). Since the rotation of the mixing blade 32 will drive the cylinder 41 to rotate, the rotation of the cylinder 41 will drive the friction ring 36 to rotate, thereby driving the friction block 37, the rotating ring 38, the rocker arm 42, the push ring 40 and the push rod 39 to rotate. The rotation of the push rod 39 will drive the push-pull rod 33 and the disc 34 to rotate. The disc 34 will drive the base 28 and the rotating seat 35 to rotate through the elastic telescopic rod 30.

[0084] The rotating seat 35 and the base 28 rotate synchronously, and there is no relative rotation between them, so the thin sheet 27 will not twist. At this time, the thin sheet 27 will rotate, and the colloid will flow by its own rotation, which will accelerate the flow rate of the colloid and increase the pressure. The colloid will flow through the through hole on the base 28.

[0085] At the same time, as the push rod 39 moves toward the side closer to the mixing blade 32, it will drive the friction plate 45 to move through the push plate 44. The friction plate 45 and the friction disk 47 will drive the rotating shaft 46 to rotate, changing the angle of the mixing blade 32 (the angle decreases here), thereby reducing the flow resistance of the colloid (in the initial state, the friction plate 45 does not contact the friction disk 47).

[0086] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A desktop automatic dispensing machine with adaptive glue dispensing, comprising an operating table (1), characterized in that, It also includes an outer frame (2) placed on the operating table (1); The outer frame (2) is equipped with a dispensing module (5), and the outer frame (2) is also equipped with a control module (3) and an adjustment module (4) that cooperate with the dispensing module (5). A storage platform (6) is fixedly installed on the outer frame (2). The dispensing module (5) consists of a dispensing head (9) and a dispensing tube (12), and the dispensing module (5) also includes an X-axis adjustment component (10), a Y-axis adjustment component (11) and a Z-axis adjustment component (13) for adjusting the position of the dispensing head (9). The dispensing head (9) includes a dispensing tube (14) that is fixedly connected to the dispensing tube (12) via a connector (16). A spray nozzle (17) is fixedly connected to the dispensing tube (14). The dispensing tube (14) is connected to the Z-axis adjustment assembly (13) via a fixing bracket (15). The dispensing tube (14) is equipped with a resistance adjustment mechanism (18), a pressure compensation mechanism (19), and a mixing mechanism (21). The pressure compensation mechanism (19) is used to adjust the internal pressure of the dispensing tube (14). The resistance adjustment mechanism (18) is used to change the flow resistance of the colloid inside the dispensing tube (14). The mixing mechanism (21) is used to perform final stirring and mixing of the colloid to be sprayed. The pressure compensation mechanism (19) includes a second frame (23) fixedly installed inside the dispensing tube (14), and a first frame (22) is slidably installed inside the dispensing tube (14). A metal elastic diaphragm tube (24) is fixedly installed between the first frame (22) and the second frame (23). A fixing plate (26) is fixedly installed on the first frame (22). The resistance adjustment mechanism (18) includes a base (28) rotatably mounted on a second frame (23). The base (28) has multiple through holes. A rotating seat (35) is rotatably mounted on the base (28). Multiple thin plates (27) are installed between the rotating seat (35) and the base (28). One end of the thin plate (27) is fixedly connected to the base (28), and the other end is fixedly connected to the rotating seat (35). A driving structure is installed between the fixing plate (26) and the rotating seat (35). The drive structure includes a mechanical seal ring that is rotatably mounted on a fixed plate (26), a push-pull rod (33) fixedly mounted on the mechanical seal ring, a disc (34) fixedly mounted on the push-pull rod (33), a plurality of elastic telescopic rods (30) fixedly mounted on the disc (34), the telescopic ends of the plurality of elastic telescopic rods (30) being fixedly connected to the base (28), a semi-helical rod (29) fixedly mounted on the disc (34), and a helical groove that cooperates with the semi-helical rod (29) being opened on the rotating seat (35); The mixing mechanism (21) includes a third frame (25) fixedly installed inside the dispensing tube (14). A friction ring (36) is rotatably installed on the third frame (25). A cylinder (41) is fixedly installed on the friction ring (36). Multiple rotating shafts (46) are rotatably installed on the cylinder (41). Each rotating shaft (46) passes through and extends into the cylinder (41). A mixing blade (32) is fixedly installed at one end of each rotating shaft (46) outside the cylinder (41). A spring coil is fixedly installed between each rotating shaft (46) and the cylinder (41). The friction ring (36) is connected to the push-pull rod (33) through a transmission structure (20).

2. The self-adaptive automatic dispensing desktop dispensing machine according to claim 1, characterized in that, The end of the glue injection tube (12) away from the connector (16) is fixedly connected to a pressure regulator (8), and the end of the pressure regulator (8) away from the glue injection tube (12) is fixedly connected to a bubble remover (7).

3. The self-adaptive automatic dispensing desktop dispensing machine according to claim 1, characterized in that, The transmission structure (20) includes a push rod (39) fixedly installed at the end of the push rod (33), a push ring (40) is slidably installed on the push rod (39), a return spring (43) is fixedly installed between the push ring (40) and the push rod (33), a plurality of columns are installed on the third frame (25), and a friction block (37) that cooperates with the friction ring (36) is slidably installed on each column. The push ring (40) and the plurality of friction blocks (37) are connected by a shrinking structure (31), and an adjustment component is installed between the push rod (39) and the plurality of rotating shafts (46).

4. The self-adaptive automatic dispensing desktop dispensing machine according to claim 3, characterized in that, The contraction structure (31) includes a plurality of swing arms (42) rotatably mounted on the push ring (40), each of the swing arms (42) being rotatably connected to the corresponding friction block (37).

5. The self-adaptive automatic dispensing desktop dispensing machine according to claim 4, characterized in that, The adjusting component includes a push plate (44) fixedly mounted on a push rod (39), and a plurality of friction plates (45) are fixedly mounted on the push plate (44). Each of the rotating shafts (46) is fixedly mounted with a friction disc (47) that cooperates with the corresponding friction plate (45).

6. The self-adaptive automatic dispensing desktop dispensing machine according to claim 1, characterized in that, The inner wall of the dispensing tube (14) is provided with a plurality of sliding grooves that cooperate with the first frame (22), and a spring rod is fixedly installed between the first frame (22) and each sliding groove.

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