Automatic dispensing mechanism for electric fan processing

Abstract

This invention discloses an automatic dispensing mechanism for electric fan processing, including a machine base, a frame, a pair of dispensing assemblies, and a pair of scraping mechanisms. The frame is connected to the machine base. The dispensing assemblies are connected to the frame and include a Y-axis assembly, a Z-axis assembly, and a pair of dispensing valves. The dispensing valves, under the action of the Y-axis and Z-axis assemblies, are used to dispense adhesive onto the electric fan workpiece. This invention achieves automatic scraping of residual adhesive from the needle tip by installing a scraping ring driven by a drive cylinder on the outside of the dispensing needle, fundamentally solving the problem of needle clogging caused by solidified residual adhesive and ensuring the continuity and stability of the dispensing operation. By integrating a hot air curing nozzle into the dispensing needle and setting the nozzle outlet direction at a preset angle to the axis of the dispensing needle, synchronous preheating or surface curing of the applied adhesive is achieved during the dispensing process, effectively shortening the adhesive surface drying time and thus improving dispensing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of electric fan processing technology, and specifically relates to an automatic glue dispensing mechanism for electric fan processing. Background Technology

[0002] In the production process of electric fans, fixing the fan blades to the motor shaft connection is a key process that affects the dynamic balance and operating noise of the fan.

[0003] Traditional dispensing methods, often relying on manual operation or semi-automatic dispensing machines, present several technical challenges: First, commonly used dispensing valves often leave residual adhesive at the needle tip after each dispensing action. Since fan production lines typically operate continuously, and some adhesives cure quickly upon contact with air, this residual adhesive easily solidifies at the needle tip. This not only leads to poor dispensing or dot misalignment during subsequent dispensing but, in severe cases, requires machine shutdown and manual needle cleaning, significantly impacting production line continuity and operational efficiency. Second, in traditional dispensing processes, dispensing and adhesive curing are two separate stages. After dispensing, the workpiece must either be conveyed to a long curing zone or left to stand and wait for the adhesive to surface dry before subsequent assembly processes can begin. This "dispense first, cure later" separation process not only increases equipment footprint but also limits the entire production line's cycle time to the slowest curing stage, making it difficult to maximize production line efficiency.

[0004] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide an automatic dispensing mechanism for electric fan processing.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic dispensing mechanism for electric fan processing, which can solve the problems of easy clogging of needles and lack of curing coordination in existing electric fan dispensing mechanisms.

[0007] To achieve the above objectives, a specific embodiment of the present invention provides an automatic dispensing mechanism for electric fan processing, including a machine base, a frame, a pair of dispensing assemblies, and a pair of scraping mechanisms. The frame is connected to the machine base. The dispensing assemblies are connected to the frame and include a Y-axis assembly, a Z-axis assembly, and a pair of dispensing valves. The dispensing valves, under the action of the Y-axis and Z-axis assemblies, are used to dispense adhesive onto the electric fan workpiece. The pair of scraping mechanisms are respectively connected to the pair of dispensing valves and are used to clean residual adhesive from the valve ends and to perform hot air curing of the applied adhesive.

[0008] In one or more embodiments of the present invention, the Y-axis assembly includes a Y-axis guide rail and a first mounting plate, the Y-axis guide rail being fixedly connected to the frame, and the first mounting plate being slidably connected to the Y-axis guide rail.

[0009] In one or more embodiments of the present invention, a solenoid valve assembly is further connected to the first mounting plate, the solenoid valve assembly being connected to the dispensing valve.

[0010] In one or more embodiments of the present invention, the Z-axis assembly includes a Z-axis guide rail and a second mounting plate, the Z-axis guide rail being connected to the first mounting plate, the second mounting plate being slidably connected to the Z-axis guide rail, and a pair of dispensing valves being connected to the second mounting plate.

[0011] In one or more embodiments of the present invention, a CCD industrial camera is further connected to the second mounting plate, the CCD industrial camera being used to acquire the dispensing position coordinates of the electric fan workpiece.

[0012] In one or more embodiments of the present invention, the scraping mechanism includes a fixed ring, a pair of lifting cylinders, a movable ring, a scraping ring, and a flexible scraper. The fixed ring is fixedly connected to the side wall of the dispensing valve. The fixed end of the lifting cylinder is connected to the fixed ring. The movable ring is slidable at the end of the dispensing valve and is connected to the free end of the fixed ring. The scraping ring is fixedly connected to the inner side of the movable ring. The flexible scraper is detachably connected to the scraping ring and makes interference contact with the outer wall of the dispensing valve.

[0013] In one or more embodiments of the present invention, the movable ring is provided with a cavity and a mounting cavity, the side wall of the movable ring is provided with an air inlet, and the mounting cavity is connected to the outside through the air inlet.

[0014] In one or more embodiments of the present invention, a miniature air pump is provided in the mounting cavity, and the air outlet of the miniature air pump is located in the cavity.

[0015] In one or more embodiments of the present invention, a metal ring is provided inside the cavity, and a heating wire is wound around the outside of the metal ring.

[0016] In one or more embodiments of the present invention, the inner wall of the movable ring is connected to a plurality of circumferentially evenly distributed nozzles, the cavity is connected to the outside through the nozzles, and the nozzle outlet direction forms an angle of 30°-60° with the axis of the dispensing valve.

[0017] Compared with the prior art, the automatic dispensing mechanism for electric fan processing of the present invention achieves the function of automatically scraping off residual glue from the needle tip when dispensing stops by sleeved with a scraping ring driven by a drive cylinder on the outside of the dispensing needle. This fundamentally solves the problem of needle clogging caused by residual glue curing and ensures the continuity and stability of dispensing operations. By integrating a hot air curing nozzle on the dispensing needle and making the nozzle outlet direction form a preset angle with the axis of the dispensing needle, the applied glue is preheated or surface cured simultaneously during the dispensing process, which effectively shortens the glue surface drying time and thus improves dispensing efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an assembly drawing of an automatic dispensing mechanism for electric fan processing according to an embodiment of the present invention;

[0020] Figure 2 This is a perspective view of an automatic glue dispensing mechanism for electric fan processing according to an embodiment of the present invention;

[0021] Figure 3 This is a partial structural schematic diagram of an automatic glue dispensing mechanism for electric fan processing according to an embodiment of the present invention;

[0022] Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle;

[0023] Figure 5 This is a perspective view of the dispensing assembly in one embodiment of the present invention;

[0024] Figure 6 This is a cross-sectional view of the dispensing assembly in one embodiment of the present invention;

[0025] Figure 7 for Figure 6 Schematic diagram of the structure at point B;

[0026] Figure 8 for Figure 6 Schematic diagram of the structure at point C.

[0027] Explanation of key figure labels:

[0028] 1-Machine base, 2-Frame, 3-Dispensing assembly, 301-Y-axis guide rail, 302-First mounting plate, 303-Z-axis guide rail, 304-Second mounting plate, 305-Dispensing valve, 306-CCD industrial camera, 307-Solenoid valve assembly, 4-Scraping mechanism, 401-Fixed ring, 402-Lifting cylinder, 403-Moving ring, 4031-Cavity, 4032-Mounting cavity, 4033-Air inlet, 404-Scraping ring, 405-Flexible scraper, 406-Miniature air pump, 407-Metal ring, 408-Heating wire, 409-Nozzle. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0030] like Figures 1 to 8 As shown, an automatic dispensing mechanism for electric fan processing according to an embodiment of the present invention includes a machine base 1, a frame 2, a pair of dispensing assemblies 3, and a pair of scraping mechanisms 4. The frame 2 is connected to the machine base 1. The dispensing assemblies 3 are connected to the frame 2 and include a Y-axis assembly, a Z-axis assembly, and a pair of dispensing valves 305. The dispensing valves 305 are used to dispense adhesive onto the electric fan workpiece under the action of the Y-axis assembly and the Z-axis assembly. The pair of scraping mechanisms 4 are respectively connected to the pair of dispensing valves 305 and are used to clean residual adhesive at the ends of the dispensing valves 305 and to perform hot air curing of the applied adhesive.

[0031] Machine base 1 is used to mount frame 2, frame 2 is used to mount dispensing assembly 3, Y-axis assembly and Z-axis assembly are used to drive dispensing valve 305 to move so that dispensing valve 305 can dispense adhesive to electric fan workpiece. Scraping mechanism 4 is used to clean residual adhesive at the end of dispensing valve 305 and can perform hot air curing of the applied adhesive.

[0032] In this embodiment, the dispensing valve 305 includes a pen body, a heating and insulation cavity disposed inside the pen body, and a dispensing needle disposed at the lower end of the pen body. A glue delivery tube is connected to the upper end of the pen body, and the glue delivery tube communicates with the heating and insulation cavity. A temperature sensor is disposed inside the heating and insulation cavity, and the temperature sensor is electrically connected to a temperature controller. The temperature controller controls the heating power of the heating and insulation cavity to ensure that the glue temperature is constant between 35℃ and 45℃, maintaining optimal fluidity.

[0033] The Y-axis assembly includes a Y-axis guide rail 301 and a first mounting plate 302. The Y-axis guide rail 301 is fixedly connected to the frame 2, and the first mounting plate 302 is slidably connected to the Y-axis guide rail 301. The Y-axis guide rail 301 is used to drive the first mounting plate 302 to move.

[0034] In addition, a solenoid valve assembly 307 is connected to the first mounting plate 302, and the solenoid valve assembly 307 is connected to the dispensing valve 305. The solenoid valve assembly 307 is used to control the amount of adhesive dispensed by the dispensing valve 305, so that the dispensing valve 305 can better complete the dispensing operation of the electric fan workpiece.

[0035] Specifically, the Z-axis assembly includes a Z-axis guide rail 303 and a second mounting plate 304. The Z-axis guide rail 303 is connected to a first mounting plate 302, and the second mounting plate 304 is slidably connected to the Z-axis guide rail 303. A pair of dispensing valves 305 are both connected to the second mounting plate 304. The Z-axis guide rail 303 is used to drive the second mounting plate 304 to move, and the second mounting plate 304 is used to mount the dispensing valves 305.

[0036] In this embodiment, the Y-axis guide rail 301 and the Z-axis guide rail 303 are driven by servo motors and ball screws, which can ensure adjustment accuracy.

[0037] In addition, a CCD industrial camera 306 is connected to the second mounting plate 304. The CCD industrial camera 306 is used to acquire the dispensing position coordinates of the electric fan workpiece. During operation, the CCD industrial camera 306 first takes a picture of the electric fan workpiece, identifies the dispensing trajectory of the electric fan workpiece through image processing algorithms, and then sends the coordinate data to the control system. The control system automatically corrects the movement trajectory of the dispensing valve 305 based on the recognition results.

[0038] like Figures 1 to 8 As shown, the scraping mechanism 4 includes a fixed ring 401, a pair of lifting cylinders 402, a movable ring 403, a scraping ring 404, and a flexible scraper blade 405. The fixed ring 401 is fixedly connected to the side wall of the dispensing valve 305. The fixed end of the lifting cylinder 402 is connected to the fixed ring 401. The movable ring 403 can slide on the end of the dispensing valve 305 and is connected to the free end of the fixed ring 401. The scraping ring 404 is fixedly connected to the inner side of the movable ring 403. The flexible scraper blade 405 is detachably connected to the scraping ring 404 and has an interference fit with the outer wall of the dispensing valve 305.

[0039] The fixed ring 401 is used to fix the lifting cylinder 402. The lifting cylinder 402 controls the movement of the movable ring 403 outside the dispensing valve 305, thereby cleaning the end of the dispensing valve 305, i.e., the dispensing needle, and preventing the dispensing needle from being blocked by residual glue. The movable ring 403 is used to install the scraper ring 404 and the flexible scraper blade 405. The scraper ring 404 is used to install the flexible scraper blade 405. When the scraper ring 404 reciprocates outside the dispensing needle, the flexible scraper blade 405 can clean the dispensing needle, preventing the dispensing needle from being blocked by residual glue and ensuring the subsequent use effect of the dispensing needle.

[0040] When dispensing is complete, the lifting cylinder 402 pushes the movable ring 403 downward. The scraping ring 404 and the flexible scraper 405 on the inner wall of the movable ring 403 can scrape off the residual glue hanging on the dispensing needle. Before dispensing begins, the movable ring 403 retracts upward to expose the dispensing needle so that the dispensing needle can complete the dispensing operation.

[0041] The movable ring 403 has a cavity 4031 and a mounting cavity 4032. The side wall of the movable ring 403 has an air inlet 4033. The mounting cavity 4032 is connected to the outside through the air inlet 4033.

[0042] In addition, a miniature air pump 406 is provided in the mounting cavity 4032, and the air outlet of the miniature air pump 406 is located in the cavity 4031. When the miniature air pump 406 is running, it can draw in external gas through the air inlet 4033 and deliver the drawn gas into the cavity 4031.

[0043] Specifically, a metal ring 407 is provided inside the cavity 4031, and a heating wire 408 is wound around the outside of the metal ring 407. The metal ring 407 is used to fix the heating wire 408. When the heating wire 408 is running, it can instantly heat the gas inside the cavity 4031 to increase the gas temperature.

[0044] like Figures 6 to 8 As shown, the inner wall of the movable ring 403 is connected to multiple circumferentially evenly distributed nozzles 409. The cavity 4031 is connected to the outside through the nozzles 409. The heated gas in the cavity 4031 can be sprayed onto the glued electric fan workpiece through the nozzles 409 to heat the glue on the electric fan workpiece and accelerate the surface curing speed of the glue.

[0045] Preferably, the outlet direction of nozzle 409 forms an angle of 30°-60° with the axis of dispensing valve 305. This angle allows hot air to be precisely blown onto the surface of the adhesive strip just applied to the workpiece, accelerating the curing of the adhesive surface, while avoiding direct hot air blowing onto the dispensing nozzle of the needle, preventing the adhesive inside the needle from curing prematurely and causing blockage due to heat.

[0046] In practical use, the electric fan workpiece is transported to the dispensing station. The CCD industrial camera 306 can capture images of the electric fan workpiece and establish a dispensing coordinate system. The CCD industrial camera 306 sends the coordinate data to the control system. The control system automatically corrects the movement trajectory of the dispensing valve 305 based on the recognition results, and enables the dispensing valve 305 to reach a preset height. Then, the control system controls the dispensing valve 305 to dispense adhesive for application.

[0047] After the adhesive is applied, the lifting cylinder 402 extends, causing the movable ring 403 to move downwards. The scraping ring 404 and the flexible scraper 405 on the inner wall of the movable ring 403 can scrape off the residual adhesive from the tip of the dispensing needle. After the residual adhesive is cleaned, the lifting cylinder 402 retracts, causing the movable ring 403 to return to its original position.

[0048] During the dispensing process, the miniature air pump 406 in the mounting cavity 4032 and the heating wire 408 in the cavity 4031 operate. The miniature air pump 406 can draw in external gas through the air inlet 4033 and deliver the drawn gas into the cavity 4031. When the heating wire 408 operates, it can instantly heat the gas in the cavity 4031, thereby increasing the gas temperature. The heated gas is blown out through the nozzle 409, so that the dispensing valve 305 can continuously blow out hot air at 60℃-80℃ during the dispensing process to assist in the curing of the applied adhesive.

[0049] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic glue dispensing mechanism for electric fan manufacturing, characterized in that, include: Machine tool; A frame is connected to the machine base; A pair of dispensing assemblies are connected to the frame. The dispensing assemblies include a Y-axis assembly, a Z-axis assembly, and a pair of dispensing valves. The dispensing valves are used to dispense adhesive onto the electric fan workpiece under the action of the Y-axis assembly and the Z-axis assembly. A pair of scraping mechanisms are respectively connected to a pair of dispensing valves, used to clean residual adhesive at the end of the dispensing valves and to perform hot air curing on the applied adhesive.

2. The automatic dispensing mechanism for electric fan processing according to claim 1, characterized in that, The Y-axis assembly includes a Y-axis guide rail and a first mounting plate. The Y-axis guide rail is fixedly connected to the frame, and the first mounting plate is slidably connected to the Y-axis guide rail.

3. The automatic dispensing mechanism for electric fan processing according to claim 2, characterized in that, The first mounting plate is also connected to a solenoid valve assembly, which is connected to the dispensing valve.

4. The automatic dispensing mechanism for electric fan processing according to claim 2, characterized in that, The Z-axis assembly includes a Z-axis guide rail and a second mounting plate. The Z-axis guide rail is connected to the first mounting plate, and the second mounting plate is slidably connected to the Z-axis guide rail. Both of the dispensing valves are connected to the second mounting plate.

5. The automatic dispensing mechanism for electric fan processing according to claim 4, characterized in that, The second mounting plate is also connected to a CCD industrial camera, which is used to acquire the coordinates of the dispensing position of the electric fan workpiece.

6. The automatic dispensing mechanism for electric fan processing according to claim 1, characterized in that, The scraping mechanism includes: A retaining ring is fixedly connected to the side wall of the dispensing valve; A pair of lifting cylinders, the fixed ends of which are connected to the fixed ring; The movable ring can slide on the end of the dispensing valve and is connected to the free end of the fixed ring; The scraper ring is fixedly connected to the inner side of the movable ring; A flexible scraper blade is detachably connected to the scraper ring and makes interference contact with the outer wall of the dispensing valve.

7. The automatic dispensing mechanism for electric fan processing according to claim 6, characterized in that, The movable ring has a cavity and a mounting cavity. The side wall of the movable ring has an air inlet, and the mounting cavity is connected to the outside through the air inlet.

8. The automatic dispensing mechanism for electric fan processing according to claim 7, characterized in that, The mounting cavity is equipped with a miniature air pump, and the air outlet of the miniature air pump is located inside the cavity.

9. An automatic dispensing mechanism for electric fan processing according to claim 7, characterized in that, The cavity contains a metal ring, and a heating wire is wound around the outside of the metal ring.

10. An automatic dispensing mechanism for electric fan processing according to claim 9, characterized in that, The inner wall of the movable ring is connected to a plurality of circumferentially evenly distributed nozzles. The cavity is connected to the outside through the nozzles. The outlet direction of the nozzles forms an angle of 30° to 60° with the axis of the dispensing valve.

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