Electromagnetic coil dispensing needle glue amount automatic detection device

Abstract

The invention discloses an electromagnetic coil dispensing needle glue amount automatic detection device which comprises a base, the upper end of the base is fixedly connected with a detection sensor and a side plate, the outer wall of the side plate is rotatably connected with a detection cylinder, and the lower half section of the detection cylinder is arranged in an inverted cone shape. Through the cooperative design of the detection cylinder, the floating piston, the detection sensor and other parts, the volume displacement principle is adopted, the volume of glue liquid injected into the detection cavity is directly converted into linear displacement of the sliding rod, the linear displacement is captured by the detection sensor, and compared with a traditional visual detection or on-line weighing technology, the detection efficiency is greatly improved. The physical contact type detection mode is not interfered by optical characteristics (such as transparency and reflective rate) of the glue solution and an external light environment, and response lag and vibration sensitivity existing in a weighing method are eliminated at the same time, so that the problems of detection misjudgment and precision fluctuation caused by glue solution characteristics or environmental factors in the background technology are effectively solved; and the real-time performance and the reliability of single-time glue dispensing amount detection are improved.

Description

Technical Field

[0001] This invention relates to the field of detection device technology, specifically to an automatic detection device for the amount of adhesive dispensed by an electromagnetic coil dispensing needle. Background Technology

[0002] As a core component of various motors, transformers, and precision electronic components, the insulation and encapsulation processes of electromagnetic coils primarily rely on automated dispensing technology. Precise control of the dispensing volume directly affects the coil's electrical insulation performance, heat dissipation, and overall product lifespan. On modern automated production lines, the stability of the dispensing volume is often affected by uncontrollable factors such as changes in adhesive viscosity, fluctuations in supply pressure, or micro-clogging of the needle. Therefore, real-time and accurate detection of the dispensing volume per cycle is crucial for ensuring high yield rates. Currently, although visual inspection and online weighing technologies are widely used, visual systems are prone to misjudgment when dealing with transparent adhesives, reflective surfaces, or complex lighting environments. High-precision weighing methods, on the other hand, suffer from response lag and susceptibility to environmental vibrations, making it difficult to fully meet the demands of high-speed, high-precision electromagnetic coil production.

[0003] The insulating varnishes or epoxy resins commonly used in existing electromagnetic coils typically have high viscosity and adhesion, making it easy for residual adhesive to remain on the detection components (such as measuring cups or pistons) after contact with the adhesive. With increasing detection cycles, the adhesive residue adhering to the inner wall alters the effective volume of the detection chamber and increases the frictional resistance of the piston movement, ultimately leading to distorted detection data or even device jamming. Furthermore, most existing devices lack efficient online self-cleaning mechanisms; relying solely on gravity drainage is often insufficient to completely remove high-viscosity waste adhesive, forcing companies to frequently stop for manual disassembly and cleaning. This not only increases labor costs but also severely restricts the continuous operation efficiency of automated production lines. Therefore, this invention proposes an automatic adhesive quantity detection device for electromagnetic coil dispensing needles to solve the above problems. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, such as the susceptibility of visual inspection to interference, the lag of weighing methods, and the difficulty in cleaning equipment, this invention incorporates a volumetric displacement detection component and a dual mechanical and chemical self-cleaning mechanism. It utilizes the displacement of a floating piston to accurately detect the amount of adhesive, and through the cam vibration scraping and automatic pumping of cleaning fluid during the rotation process, it achieves thorough removal of high-viscosity waste adhesive, avoiding detection distortion and equipment jamming, and improving the efficiency of automated operations.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic detection device for the amount of adhesive in an electromagnetic coil dispensing needle, comprising a base, a detection sensor and a side plate fixedly connected to the upper end of the base, a detection cylinder rotatably connected to the outer wall of the side plate, the lower half of the detection cylinder being inverted conical in shape, a detection cavity being formed inside the detection cylinder, a feed groove being formed at the upper end of the detection cylinder and communicating with the detection cavity, a floating piston being slidably connected inside the detection cavity, a sliding rod being fixedly connected to the lower end of the floating piston, the sliding rod being coaxial with the detection cylinder, the sliding rod being located above the detection sensor, two sets of discharge pipes being provided on the side wall of the detection cylinder, a discharge groove being formed at the upper end of the base, a cleaning mechanism being installed inside the detection cylinder, and a draining mechanism being provided at the upper end of the base.

[0008] Preferably, the draining mechanism is rotatably connected to an electric push rod on the outer wall of the side plate, and the telescopic end of the electric push rod is rotatably connected to the outer wall of the detection cylinder.

[0009] Preferably, the cleaning mechanism includes a scraper fixedly connected to the lower end face of the floating piston. The scraper is disposed in contact with the inner wall of the detection cylinder, and the inner wall of the scraper is molded toward its axis to guide the adhesive liquid.

[0010] Preferably, an arc-shaped plate is fixedly connected to the upper end of the base. The arc-shaped plate is arranged on the rotation path of the detection cylinder. Multiple sets of protrusions are equidistantly arranged on the end face of the arc-shaped plate. The outer wall of the protrusion is semi-circular. A ball bearing is installed at the end of the slide rod, and the ball bearing slides against the outer wall of the multiple sets of protrusions.

[0011] Preferably, a spring is sleeved on the outer wall of the slide rod, one end of the spring is fixedly connected to the inner wall of the detection cylinder, and the other end of the spring is fixedly connected to the lower end face of the floating piston.

[0012] Preferably, a pumping cylinder is fixedly connected to the outer wall of the detection cylinder, and a connecting pipe one and a connecting pipe two are fixedly connected to the outer wall of the pumping cylinder respectively. Cleaning fluid is injected into the pumping cylinder. The connecting pipe one communicates with the top of the detection cylinder, and the connecting pipe two is connected to an external container containing cleaning fluid. A one-way valve is installed in both the connecting pipe one and the connecting pipe two.

[0013] Preferably, a pumping piston is slidably connected inside the pumping cylinder, a connecting rod is fixedly connected to the lower end face of the pumping piston, the connecting rod is fixedly connected to the outer wall of the slide rod, and scale lines are provided on the outer wall of the detection cylinder.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides an automatic detection device for adhesive quantity of an electromagnetic coil dispensing needle, which has the following beneficial effects:

[0016] 1. This invention, through the coordinated design of components such as the detection cylinder, floating piston, and detection sensor, adopts the principle of volumetric displacement to directly convert the volume of adhesive injected into the detection chamber into the linear displacement of the slide bar, which is captured by the detection sensor. Compared with traditional visual inspection or online weighing technology, this physical contact detection method is not affected by the optical properties of the adhesive (such as transparency and reflectivity) and the external lighting environment. At the same time, it eliminates the response lag and vibration sensitivity of the weighing method, thereby effectively solving the problems of detection misjudgment and accuracy fluctuation caused by adhesive properties or environmental factors in the background technology, and improving the real-time performance and reliability of single dispensing volume detection.

[0017] 2. This invention constructs a dual self-cleaning mechanism based on workstation switching, utilizing the precise linkage of components such as an electric push rod, an arc-shaped plate, a protrusion, a scraper, and a pumping cylinder. During the drainage process, the mechanical energy generated by the rotation of the detection cylinder drives the sliding rod to produce high-frequency axial reciprocating motion on the protrusion, which in turn drives the scraper to physically scrape the inner wall of the detection chamber. Simultaneously, it drives the pumping piston to automatically supply cleaning fluid for dissolution and dilution. This active composite cleaning method overcomes the shortcomings of simple gravity drainage in removing high-viscosity residual adhesive, effectively avoiding detection volume errors and piston jamming caused by adhesive buildup. This significantly extends the equipment maintenance cycle and solves the technical pain point in the background technology where frequent shutdowns for manual cleaning restrict the continuous operation efficiency of automated production lines. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an automatic glue quantity detection device for an electromagnetic coil dispensing needle proposed in this invention;

[0019] Figure 2 for Figure 1 Structural diagram;

[0020] Figure 3 This is a schematic cross-sectional view of the detection cylinder in Figure 1;

[0021] Figure 4 for Figure 3 Schematic diagram of components such as the floating piston, slide bar, and spring;

[0022] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure at the middle pumping cylinder.

[0023] In the diagram: 1. Base; 2. Detection sensor; 3. Side plate; 4. Detection cylinder; 5. Electric push rod; 6. Arc plate; 7. Protrusion; 8. Scale line; 9. Pumping cylinder; 10. Discharge pipe; 11. Floating piston; 12. Feed chute; 13. Connecting rod; 14. Spring; 15. Slide rod; 16. Connecting pipe one; 17. Pumping piston; 18. Connecting pipe two; 19. Scraper; 20. Detection chamber; 21. Discharge chute. Detailed Implementation

[0024] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0025] This invention provides a technical solution for an automatic glue quantity detection device for an electromagnetic coil dispensing needle:

[0026] Please see Figure 1-5 An automatic detection device for the amount of adhesive dispensed by an electromagnetic coil dispensing needle includes a base 1. A detection sensor 2 and a side plate 3 are fixedly connected to the upper end of the base 1. A detection cylinder 4 is rotatably connected to the outer wall of the side plate 3. The lower half of the detection cylinder 4 is inverted conical. A detection chamber 20 is opened inside the detection cylinder 4. A feed groove 12 is opened at the upper end of the detection cylinder 4 and communicates with the detection chamber 20. A floating piston 11 is slidably connected inside the detection chamber 20. A sliding rod 15 is fixedly connected to the lower end of the floating piston 11. The sliding rod 15 is coaxial with the detection cylinder 4 and is located above the detection sensor 2. Two sets of discharge pipes 10 are provided on the side wall of the detection cylinder 4. A discharge groove 21 is opened at the upper end of the base 1. A cleaning mechanism is installed inside the detection cylinder 4. A draining mechanism is provided at the upper end of the base 1.

[0027] Furthermore, in this embodiment, through the coordinated design of the detection cylinder 4, the floating piston 11, and the detection sensor 2, a volumetric displacement method is used instead of the traditional visual inspection or direct weighing method. When the adhesive is injected into the detection chamber 20, the volume of the adhesive is directly converted into the linear displacement of the floating piston 11 and the slide rod 15. This displacement is accurately captured by the detection sensor 2 below, such as a laser displacement sensor. This physical contact detection method is not affected by the transparency, reflectivity, or external lighting conditions of the adhesive, effectively solving the technical problems mentioned in the background art, such as the visual system's tendency to misjudge when facing transparent adhesive or complex lighting environments, and the online weighing method's response lag and susceptibility to vibration interference. This ensures that the detection of the amount of adhesive dispensed in a single operation during the electromagnetic coil dispensing process is both real-time and accurate.

[0028] The draining mechanism is rotatably connected to the electric push rod 5 on the outer wall of the side plate 3, and the telescopic end of the electric push rod 5 is rotatably connected to the outer wall of the detection cylinder 4.

[0029] Furthermore, in this embodiment, the electric push rod 5 drives the detection cylinder 4 to rotate, thus establishing a rapid switching mechanism between detection and waste discharge. After detection is completed, the electric push rod 5 pushes the detection cylinder 4 to tilt or flip, using gravity and subsequent mechanical linkage to guide the waste glue to the discharge pipe 10 and finally discharge it into the discharge chute 21.

[0030] The cleaning mechanism includes a scraper 19 fixedly connected to the lower end face of the floating piston 11. The scraper 19 is set to fit against the inner wall of the detection cylinder 4, and the inner wall of the scraper 19 is set to be pulled out towards its axis, so as to guide the adhesive liquid.

[0031] Furthermore, in this embodiment, the scraper 19, moving with the floating piston 11, achieves real-time physical scraping of the inner wall of the detection cylinder 4. Since the insulating varnish or epoxy resin commonly used in electromagnetic coils has extremely high viscosity, it easily adheres to the detection cavity wall, causing volumetric errors. The tight-fitting design of the scraper 19 can forcibly peel off the adhered adhesive residue. Combined with the draft guide structure on its inner wall, it gathers the scraped waste adhesive towards the center for easy centralized discharge. This design directly addresses the problem mentioned in the background art that "residual adhesive easily remains on the detection components, leading to distorted detection data and frequent device maintenance." Through its online self-cleaning function, it extends the device's maintenance cycle and reduces labor costs.

[0032] An arc-shaped plate 6 is fixedly connected to the upper end of the base 1. The arc-shaped plate 6 is set on the rotation path of the detection cylinder 4. Multiple sets of protrusions 7 are equidistantly arranged on the end face of the arc-shaped plate 6. The outer wall of the protrusions 7 is semi-circular. A ball is installed at the end of the slide rod 15, and the ball slides against the outer wall of the multiple sets of protrusions 7.

[0033] Furthermore, in this embodiment, the arc-shaped plate 6 and the protrusion 7 form a wave-shaped mechanical cam track. When the detection cylinder 4 rotates to drain under the drive of the electric push rod 5, the ball bearings at the bottom of the slide rod 15 roll on the protrusion 7, forcing the slide rod 15 and the floating piston 11 to generate high-frequency axial reciprocating vibration. This "pulse-like" vibration derived from the rotation process can not only further loosen the stubborn adhesive blocks with extremely strong adhesion, but also drive the floating piston 11 to slide, thereby realizing the cleaning operation of the scraper 19.

[0034] A spring 14 is fitted on the outer wall of the slide rod 15. One end of the spring 14 is fixedly connected to the inner wall of the detection cylinder 4, and the other end of the spring 14 is fixedly connected to the lower end face of the floating piston 11.

[0035] Furthermore, in this embodiment, the spring 14 serves a dual purpose: firstly, as a damping element during detection, ensuring a stable linear relationship between the displacement of the floating piston 11 and the adhesive injection pressure; secondly, as a reset power source during drainage and cleaning. When the slide rod 15 passes the protrusion 7, the elastic potential energy of the spring 14 is rapidly released, driving the floating piston 11 to rebound quickly, producing a "slapping" effect. This highly dynamic reciprocating motion further enhances the adhesive discharge power, ensuring that the device maintains a low-resistance, high-sensitivity operating state during the long-term automated operation mentioned in the background art, avoiding increased piston friction resistance and jamming caused by adhesive buildup.

[0036] A pumping cylinder 9 is fixedly connected to the outer wall of the detection cylinder 4. A connecting pipe 16 and a connecting pipe 2 18 are fixedly connected to the outer wall of the pumping cylinder 9. Cleaning fluid is injected into the pumping cylinder 9. The connecting pipe 16 is connected to the top of the detection cylinder 4. The connecting pipe 2 18 is connected to an external container containing cleaning fluid. A one-way valve is installed in both the connecting pipe 16 and the connecting pipe 2 18.

[0037] Furthermore, in this embodiment, a chemical solvent-assisted cleaning mechanism is introduced. Cleaning fluid is injected into the detection cylinder 4 through connecting pipe 16, using the solvent to dissolve or dilute high-viscosity residual adhesive. The one-way valve design ensures that the cleaning fluid can only flow in one direction, preventing waste adhesive from backflowing and contaminating the cleaning fluid source. This design specifically addresses the problem in the prior art where, for certain ultra-high viscosity or fast-drying adhesives such as UV adhesives and epoxy resins, it is difficult to completely remove trace residues by relying solely on physical scraping. Through the dual approach of "physical scraping + chemical dissolution," "dead zone" residues in the detection chamber are eliminated, ensuring the accuracy of subsequent tests.

[0038] A pumping piston 17 is slidably connected inside the pumping cylinder 9. A connecting rod 13 is fixedly connected to the lower end face of the pumping piston 17. The connecting rod 13 is fixedly connected to the outer wall of the slide rod 15. A scale line 8 is provided on the outer wall of the detection cylinder 4.

[0039] Furthermore, in this embodiment, the pumping piston 17 is directly linked to the slide rod 15 via the connecting rod 13. This means that while the slide rod 15 reciprocates under the action of the protrusion 7 to scrape off waste adhesive, it also synchronously drives the pumping piston 17 to perform a suction operation, automatically pumping the cleaning fluid into the detection cylinder 4. This achieves on-demand automatic supply of cleaning fluid. It greatly simplifies the equipment structure, reduces manufacturing costs, and perfectly solves the pain point mentioned in the background art where automated production lines must frequently stop for manual cleaning due to the lack of an efficient online self-cleaning mechanism, thus improving the continuous operation capability and production efficiency of the entire line.

[0040] In practical use, the working principle of this invention is as follows:

[0041] When using this electromagnetic coil dispensing needle automatic glue volume detection device, the base 1 serves as the basic support component, stably placed on the worktable. The detection cylinder 4 is in the initial vertical detection position via the rotational connection of the side plate 3 and the electric push rod 5. At this time, the floating piston 11 is in the initial equilibrium position within the detection chamber 20 under the action of the spring 14, and the lower end of the slide rod 15 is directly opposite the sensing area of ​​the detection sensor 2. The entire device is in standby mode, ready to receive glue dispensing operations from the electromagnetic coil dispensing needle.

[0042] At the start of the dispensing operation, the dispensing needle is aligned with the feed trough 12, injecting a measured amount of adhesive into the detection chamber 20. As the adhesive is continuously injected, the volumetric pressure within the detection chamber 20 gradually increases, overcoming the resistance of the spring 14 and pushing the floating piston 11 and the coaxially connected slide rod 15 to produce a linear axial displacement. During this process, the displacement of the lower end of the slide rod 15 is captured in real time by the detection sensor 2 on the base 1, and the data is transmitted to the control system for analysis and comparison. This physical detection method based on volumetric displacement can accurately reflect the actual dispensing volume, effectively avoiding the defects of visual detection in the background technology, such as interference from adhesive transparency and reflectivity, and response lag of the weighing method, ensuring the real-time performance and accuracy of single dispensing volume detection. In addition, the operator can visually observe the dispensing situation through the scale lines 8 on the outer wall of the detection cylinder 4.

[0043] After a single inspection cycle is completed, the electric push rod 5 on the system control side plate 3 is activated. The telescopic end of the electric push rod 5 moves, driving the inspection cylinder 4 to tilt and flip around the axis. This action not only realizes the switching of workstations, but more importantly, it initiates the self-cleaning process. As the inspection cylinder 4 rotates, the ball bearings at the bottom of the slide rod 15 contact and slide over multiple protrusions 7 on the surface of the arc-shaped plate 6 on the base 1.

[0044] As the slide rod 15 rotates with the detection cylinder 4 past the protrusion 7, it is forced to generate high-frequency axial reciprocating motion. This motion not only directly drives the floating piston 11 in the detection cavity 20 to vibrate in a pulsed manner, loosening the stubborn adhesive residue attached to the inner wall, but more importantly, it drives the scraper 19 at the lower end of the floating piston 11 to reciprocate up and down on the inner wall of the detection cylinder 4. The draft guide structure of the scraper 19, combined with the close-fitting scraping action, forcibly peels off the attached high-viscosity insulating varnish or epoxy resin and brings it towards the center, solving the problem of residual adhesive in the detection components causing detection distortion in the prior art. At the same time, the spring 14 is continuously compressed and released during this process, providing strong rebound force, assisting the slide rod 15 to quickly reset, enhancing the cleaning power of the scraper 19, and preventing the piston from jamming due to the accumulation of adhesive residue.

[0045] Simultaneously, the reciprocating motion of the slide bar 15 is synchronously transmitted to the pumping piston 17 inside the pumping cylinder 9 via the connecting rod 13. The pumping piston 17 then generates a suction action, drawing cleaning fluid from the external container through the second connecting pipe 18, and pumping the cleaning fluid into the top of the detection cylinder 4 through the first connecting pipe 16. The injection of cleaning fluid, combined with the physical scraping of the scraper 19, dissolves and dilutes the residual high-viscosity adhesive, achieving dual cleaning through "physical scraping + chemical dissolution". Under the assistance of gravity and piston vibration, the waste adhesive mixed with cleaning fluid is smoothly discharged through the discharge pipe 10 and finally flows into the discharge trough 21 of the base 1 for collection, eliminating dead corner residue.

[0046] In summary, this device, through the precise linkage of various mechanisms, achieves a closed-loop operation from accurate glue quantity detection to automatic, efficient, and self-cleaning, improving the automation level and production efficiency of the electromagnetic coil dispensing process, and effectively solving the industry pain points of insufficient accuracy and frequent equipment maintenance of traditional detection methods.

[0047] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. An automatic detection device for adhesive quantity of an electromagnetic coil dispensing needle, comprising a base (1), characterized in that: The upper end of the base (1) is fixedly connected to a detection sensor (2) and a side plate (3). The outer wall of the side plate (3) is rotatably connected to a detection cylinder (4). The lower half of the detection cylinder (4) is set in an inverted cone shape. A detection cavity (20) is opened inside the detection cylinder (4). A feed groove (12) is opened at the upper end of the detection cylinder (4) and communicates with the detection cavity (20). A floating piston (11) is slidably connected inside the detection cavity (20). A sliding rod (15) is fixedly connected at the lower end of the floating piston (11). The sliding rod (15) and the detection cylinder (4) are on the same axis. The sliding rod (15) is located above the detection sensor (2). Two sets of discharge pipes (10) are set on the side wall of the detection cylinder (4). A discharge groove (21) is opened at the upper end of the base (1). A cleaning mechanism is installed inside the detection cylinder (4). A draining mechanism is set at the upper end of the base (1).

2. The automatic glue quantity detection device for an electromagnetic coil dispensing needle according to claim 1, characterized in that: The draining mechanism is rotatably connected to the electric push rod (5) on the outer wall of the side plate (3), and the telescopic end of the electric push rod (5) is rotatably connected to the outer wall of the detection cylinder (4).

3. The automatic glue quantity detection device for an electromagnetic coil dispensing needle according to claim 2, characterized in that: The cleaning mechanism includes a scraper (19) fixedly connected to the lower end face of the floating piston (11). The scraper (19) is set to fit against the inner wall of the detection cylinder (4), and the inner wall of the scraper (19) is set to be molded towards its axis, so as to guide the adhesive liquid.

4. The automatic glue quantity detection device for an electromagnetic coil dispensing needle according to claim 3, characterized in that: An arc plate (6) is fixedly connected to the upper end of the base (1). The arc plate (6) is set on the rotation path of the detection cylinder (4). Multiple sets of protrusions (7) are equidistantly arranged on the end face of the arc plate (6). The outer wall of the protrusion (7) is semi-circular. A ball is installed at the end of the slide rod (15), and the ball slides against the outer wall of the multiple sets of protrusions (7).

5. The automatic glue quantity detection device for an electromagnetic coil dispensing needle according to claim 4, characterized in that: A spring (14) is sleeved on the outer wall of the slide rod (15). One end of the spring (14) is fixedly connected to the inner wall of the detection cylinder (4), and the other end of the spring (14) is fixedly connected to the lower end face of the floating piston (11).

6. The automatic glue quantity detection device for an electromagnetic coil dispensing needle according to claim 5, characterized in that: A pumping cylinder (9) is fixedly connected to the outer wall of the detection cylinder (4). A connecting pipe one (16) and a connecting pipe two (18) are fixedly connected to the outer wall of the pumping cylinder (9). Cleaning fluid is injected into the pumping cylinder (9). The connecting pipe one (16) is connected to the top of the detection cylinder (4). The connecting pipe two (18) is connected to an external container containing cleaning fluid. A one-way valve is installed in both the connecting pipe one (16) and the connecting pipe two (18).

7. The automatic glue quantity detection device for an electromagnetic coil dispensing needle according to claim 6, characterized in that: A pumping piston (17) is slidably connected inside the pumping cylinder (9). A connecting rod (13) is fixedly connected to the lower end face of the pumping piston (17). The connecting rod (13) is fixedly connected to the outer wall of the slide rod (15). A scale line (8) is provided on the outer wall of the detection cylinder (4).

Images