A device for preventing clogging of dispensing machine needles

Abstract

This utility model relates to the field of glue dispensing machine technology and discloses a glue dispensing machine needle anti-clogging device, including a base. A cleaning mechanism is installed on the top front side of the base. The cleaning mechanism cleans the inner wall of the glue dispensing needle. The cleaning mechanism includes a sliding plate, the rear side of which is slidably connected to the front side of the top outer wall of the base. A drive motor is installed on the top rear side of the outer wall of the sliding plate, and a transmission component is installed at the output end of the drive motor. A reciprocating component is installed on the bottom front side of the outer wall of the sliding plate. In this utility model, the drive motor drives the eccentric wheel to rotate, and the connecting rod drives the connecting block to move. Because the clamping block clamps the connecting block on both sides and the connection between the two is hinged, the brush head moves up and down rapidly within the needle cavity. This mechanism can clean the internal adhesive without replacing the needle, solving the problem of adhesive adhering to the inner wall and the lack of obvious anti-clogging effect in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of glue dispensing machine technology, and in particular to a glue dispensing machine needle anti-clogging device. Background Technology

[0002] In precision manufacturing fields such as electronics and automobiles, dispensing machines use needles to precisely inject adhesive into the gaps of workpieces. The stability of their operation directly affects the sealing performance and production efficiency of the products. As a key component for adhesive output, the needle is prone to blockage due to the adhesive solidifying when left to stand or the accumulation of impurities. This leads to problems such as uneven adhesive output and adhesive interruption, requiring frequent machine shutdowns for cleaning, which seriously restricts the improvement of production line efficiency.

[0003] Existing anti-clogging devices mostly employ two technical approaches: one is to maintain the fluidity of the adhesive by heating the needle, such as by wrapping a heating wire around the outer wall of the needle and using a temperature control module; the other is to use timed high-pressure air blowing, which removes residue by blowing air into the needle through an air tube during the dispensing interval. The former delays the curing of the adhesive by controlling the temperature, but its effect is limited for adhesives with long downtime or high curing rates, and heating can easily cause the adhesive to denature, affecting the bonding performance. The latter uses airflow impact to remove residue, but it is difficult to deal with stubborn adhesive layers adhering to the inner wall of the needle, especially when the adhesive has partially cured to form a film. Insufficient air blowing pressure can lead to residue accumulation, eventually causing clogging. To solve the above problems, under the current technical conditions, some devices have tried to adopt a detachable needle design to reduce clogging by replacing the needle, but this increases the cost of consumables and downtime for needle replacement. Another solution is to install a filter in the adhesive path, which can intercept large particulate impurities, but it cannot solve the problem of the adhesive itself adhering to the inner wall due to viscosity changes or temperature fluctuations, resulting in a short-lasting anti-clogging effect that is difficult to meet the needs of continuous production. Summary of the Invention

[0004] To overcome the above shortcomings, this utility model provides a needle anti-clogging device for a dispensing machine, which aims to improve the existing technology by increasing the cost of consumables and downtime for needle replacement, and failing to solve the problem of glue adhering to the inner wall and having an insignificant anti-clogging effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a dispensing machine needle anti-clogging device, comprising a base, a cleaning mechanism installed on the top front side of the base, the cleaning mechanism being used to clean the inner wall of the dispensing needle, a lifting mechanism installed on the rear side of the cleaning mechanism, the lifting mechanism being used to adjust the vertical working position of the cleaning mechanism; the cleaning mechanism includes a sliding plate, the rear side of the sliding plate being slidably connected to the front side of the top outer wall of the base, a drive motor installed on the top rear side of the outer wall of the sliding plate, a transmission assembly installed at the output end of the drive motor, and a reciprocating assembly installed on the bottom front side of the outer wall of the sliding plate.

[0006] As a further description of the above technical solution:

[0007] The transmission assembly includes an eccentric wheel, which is fixedly connected to the output end of the drive motor. A rotating ring is rotatably connected to the outer wall of the eccentric wheel. A connecting rod is fixedly connected to the bottom of the outer wall of the rotating ring. Clamping blocks are provided on both the left and right sides of the connecting rod. Both clamping blocks are fixedly connected to the bottom of the front side of the outer wall of the sliding plate.

[0008] As a further description of the above technical solution:

[0009] The reciprocating assembly includes a connecting block, the top of which is rotatably connected to the bottom of a connecting rod. A connecting strip is fixedly connected to the front side of the outer wall of the connecting block, and a brush head is fixedly connected to the top of the connecting strip.

[0010] As a further description of the above technical solution:

[0011] The lifting mechanism includes a rack, which is fixedly connected to the upper middle part of the base. Slide rails are provided on both the left and right sides of the rack, and both slide rails are fixedly connected to the front side of the upper middle part of the base. The top and bottom ends of the rear side of the rack are engaged with ratchet assemblies, and a surrounding plate is fixedly connected to the middle rear side of the base.

[0012] As a further description of the above technical solution:

[0013] The ratchet assembly includes a limiting ratchet, which is rotatably connected to the top and bottom of the middle part of the base, and a spring is fixedly connected to the front side of the limiting ratchet.

[0014] As a further description of the above technical solution:

[0015] A limiting baffle is fixedly connected to the front side of the lower middle part of the base, and a waste liquid tank is provided on the front side of the limiting baffle.

[0016] As a further description of the above technical solution:

[0017] The base has a needle body on its front side, and the waste liquid tank is located at the bottom of the needle body.

[0018] As a further description of the above technical solution:

[0019] A motor housing is fixedly connected to the top rear side of the sliding plate, and the drive motor is mounted on the rear side of the sliding plate through the motor housing.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the drive motor drives the eccentric wheel to rotate, and the connecting rod drives the connecting block to move. Because the clamping block clamps the connecting block on both sides and the connection between the two is hinged, the connecting block moves vertically up and down between the brush head. The brush head moves rapidly up and down in the inner cavity of the glue dispensing needle. This mechanism can clean the internal adhesive without replacing the needle, solving the problems of increased consumable costs and downtime for needle replacement in the prior art, inability to solve the problem of adhesive adhering to the inner wall, and insignificant anti-clogging effect.

[0022] 2. In this utility model, the sliding plate slides up and down on the base with the help of a rack and ratchet assembly to adapt to different needle lengths. The surrounding plate prevents the sliding plate from falling off the base. When it is necessary to adjust the working height of the cleaning mechanism, the sliding plate is held and slid up and down along the base. The limiting ratchet is engaged with the teeth of the rack to prevent it from slipping due to gravity. The spring presses the limiting ratchet tightly on the rack to ensure friction and provide sliding damping, thereby improving the accuracy of adjustment. The slide rail provides a track for the movement of the sliding plate and keeps the movement direction stable. This mechanism can adjust the working height of the cleaning mechanism according to the actual operation, thereby improving the actual applicability of the device. Attached Figure Description

[0023] Figure 1 This is a front view of a dispensing machine needle anti-clogging device proposed in this utility model;

[0024] Figure 2 This is a perspective view of a dispensing machine needle anti-clogging device proposed in this utility model;

[0025] Figure 3 This is a split view of the cleaning mechanism of the anti-clogging device for the needle of a dispensing machine proposed in this utility model;

[0026] Figure 4 This is a split view of the lifting mechanism of the anti-clogging device for the needle of a dispensing machine proposed in this utility model;

[0027] Figure 5 This is an exploded view of the ratchet assembly of an anti-clogging device for a glue dispensing machine needle, as proposed in this utility model.

[0028] Legend:

[0029] 1. Base; 2. Cleaning mechanism; 201. Sliding plate; 202. Drive motor; 203. Transmission assembly; 2031. Eccentric wheel; 2032. Rotating ring; 2033. Connecting rod; 2034. Clamping block; 204. Reciprocating assembly; 2041. Connecting block; 2042. Connecting strip; 2043. Brush head; 3. Lifting mechanism; 301. Rack; 302. Slide rail; 303. Ratchet assembly; 3031. Limiting ratchet; 3032. Spring; 304. Enclosure; 4. Limiting baffle; 5. Needle body; 6. Motor compartment; 7. Waste liquid tank. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model is provided: a glue dispensing machine needle anti-clogging device, including a base 1, a cleaning mechanism 2 installed on the front top of the base 1, the cleaning mechanism 2 is used to clean the inner wall of the glue dispensing needle, and a lifting mechanism 3 is installed on the rear side of the cleaning mechanism 2, the lifting mechanism 3 is used to adjust the vertical working position of the cleaning mechanism 2.

[0032] The cleaning mechanism 2 includes a sliding plate 201. The rear side of the sliding plate 201 is slidably connected to the front side of the top outer wall of the base 1. A drive motor 202 is installed on the rear side of the top of the outer wall of the sliding plate 201. The model is BG45X30. This type of motor is small in size and easy to install on the side of the needle mounting seat without taking up too much space. A transmission assembly 203 is installed at the output end of the drive motor 202. A reciprocating assembly 204 is installed on the front side of the bottom of the outer wall of the sliding plate 201.

[0033] The transmission assembly 203 includes an eccentric wheel 2031, which is fixedly connected to the output end of the drive motor 202. A rotating ring 2032 is rotatably connected to the outer wall of the eccentric wheel 2031. A connecting rod 2033 is fixedly connected to the bottom of the outer wall of the rotating ring 2032. Clamping blocks 2034 are provided on both the left and right sides of the connecting rod 2033. Both clamping blocks 2034 are fixedly connected to the bottom of the front side of the outer wall of the sliding plate 201.

[0034] The reciprocating assembly 204 includes a connecting block 2041, the top of which is rotatably connected to the bottom of the connecting rod 2033. A connecting strip 2042 is fixedly connected to the front side of the outer wall of the connecting block 2041, and a brush head 2043 is fixedly connected to the top of the connecting strip 2042.

[0035] A motor compartment 6 is fixedly connected to the top rear side of the sliding plate 201, and the drive motor 202 is installed on the rear side of the sliding plate 201 through the motor compartment 6.

[0036] Specifically, place the device stably directly below the dispensing needle to be cleaned, align the top of the connecting block 2041 with the opening of the dispensing needle, and slowly insert the brush head 2043 into the opening. Start the drive motor 202. The output shaft of the drive motor 202 drives the eccentric wheel 2031 to rotate around its axis. The eccentric wheel 2031 adopts an eccentric design, and its center of gravity is off-center from the rotation center. During its rotation, it will drive the outer rotating ring 2032 to rotate synchronously. This causes the connecting rod 2033 connected to the rotating ring 2032 to swing left and right, while its bottom end will show periodic vertical height changes. The bottom of 3 drives the connecting block 2041 to move through the connector. Since the clamping blocks 2034 on both sides are symmetrically distributed on both sides of the connecting block 2041 and clamp the connecting block 2041, and the connection between the connecting block 2041 and the connecting rod 2033 adopts a hinge structure, the connecting block 2041 will move vertically up and down between the two clamping blocks 2034. The bottom of the connecting block 2041 drives the connecting strip 2042 and the brush head 2043 at the end of the connecting strip 2042 to move up and down quickly in the cavity of the glue dispensing needle. The friction of the brush head 2043 washes away the glue residue attached to the inner wall of the cavity.

[0037] Reference Figure 4 and Figure 5 The lifting mechanism 3 includes a rack 301, which is fixedly connected to the upper middle part of the base 1. Slide rails 302 are provided on both the left and right sides of the rack 301. Both slide rails 302 are fixedly connected to the front side of the upper middle part of the base 1. The top and bottom ends of the rear side of the rack 301 are meshed with ratchet assemblies 303. A surrounding plate 304 is fixedly connected to the middle rear side of the base 1.

[0038] The ratchet assembly 303 includes a limiting ratchet 3031, which is rotatably connected to the top and bottom of the middle part of the base 1. A spring 3032 is fixedly connected to the front side of the limiting ratchet 3031.

[0039] Specifically, the sliding plate 201 slides up and down on the base 1 with the help of the rack 301 and the ratchet assembly 303 to accommodate the length of needles of different specifications. The surrounding plate 304 is installed at the top edge of the base 1 to prevent the sliding plate 201 from falling off the base 1. When it is necessary to adjust the working height of the cleaning mechanism 2, the sliding plate 201 is held by hand and slid up and down along the surface of the base 1. The limiting ratchet 3031 in the ratchet assembly 303 will automatically engage with the teeth of the rack 301 to form a mechanical limit. To prevent the sliding plate 201 from slipping off due to its own weight, the two ends of the spring 3032 are respectively connected to the limiting ratchet 3031 and the base 1, which continuously presses the limiting ratchet 3031 onto the rack 301 to ensure that there is always friction between the two, providing sliding damping for the movement of the sliding plate 201 and further improving the accuracy of height adjustment. Two parallel slide rails 302 are fixed on the surface of the base 1 to provide a guide track for the movement of the sliding plate 201, limiting the movement trajectory of the sliding plate 201 and maintaining the stability of its movement direction.

[0040] Reference Figure 1 and Figure 2 A limiting baffle 4 is fixedly connected to the front side of the lower middle part of the base 1. A waste liquid tank 7 is provided on the front side of the limiting baffle 4. A needle body 5 is provided on the front side of the base 1. The waste liquid tank 7 is located at the bottom of the needle body 5.

[0041] Specifically, the limit baffle 4 prevents the sliding plate 201 from moving too far downward and damaging the equipment itself; the waste liquid tank 7 is used to temporarily store residual waste or waste liquid from cleaning; and the needle body 5 is the main working part for dispensing glue, through which the glue is injected into the target position from its internal cavity.

[0042] Working principle: Place the device under the dispensing needle to be cleaned, align the connecting block 2041 with its opening, and insert the brush head 2043. Start the drive motor 202, which drives the eccentric wheel 2031 to rotate. The eccentric wheel 2031 has an eccentric design, and its rotation will drive the outer rotating ring 2032 to rotate. This causes the connecting rod 2033 to swing while its bottom end changes vertical height. The connecting rod 2033 drives the connecting block 2041 to move. Because the clamping blocks 2034 clamp the connecting block 2041 on both sides... 1. Furthermore, the connection between the connecting block 2041 and the connecting rod 2033 is hinged, so the connecting block 2041 will move vertically up and down between the clamping blocks 2034. The connecting block 2041 drives the connecting strip 2042 and the brush head 2043 to move rapidly up and down in the cavity inside the tube glue needle, washing away the glue residue on the inner wall. This mechanism can clean the glue adhering inside without replacing the needle, solving the problems of increased consumable costs and downtime needle replacement time in the existing technology, and the inability to solve the problem of glue adhering to the inner wall and the insignificant anti-clogging effect.

[0043] The sliding plate 201 slides up and down on the base 1 with the help of the rack 301 and ratchet assembly 303 to adapt to different needle lengths. The surrounding plate 304 keeps the sliding plate 201 from falling off the base 1. When it is necessary to adjust the working height of the cleaning mechanism 2, the sliding plate 201 is held by hand and slid up and down along the base 1. The limiting ratchet 3031 is engaged in the tooth gap of the rack 301 to prevent the sliding plate 201 from slipping due to gravity. The spring 3032 presses the limiting ratchet 3031 tightly on the rack 301 to ensure the friction between the two and provide sliding damping, further improving the adjustment accuracy. The slide rail 302 provides a track for the movement of the sliding plate 201 and maintains the stability of its movement direction. This set of mechanisms can adjust the working height of the cleaning mechanism 2 according to the actual operation, improving the actual applicability of the device.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A glue injection machine needle clogging prevention device comprising a base (1), characterized in that: A cleaning mechanism (2) is installed on the top front side of the base (1). The cleaning mechanism (2) is used to clean the inner wall of the glue dispensing needle. A lifting mechanism (3) is installed on the rear side of the cleaning mechanism (2). The lifting mechanism (3) is used to adjust the vertical working position of the cleaning mechanism (2). The cleaning mechanism (2) includes a sliding plate (201), the rear side of which is slidably connected to the front side of the top outer wall of the base (1). A drive motor (202) is installed on the rear side of the top of the outer wall of the sliding plate (201), a transmission assembly (203) is installed at the output end of the drive motor (202), and a reciprocating assembly (204) is installed on the front side of the bottom of the outer wall of the sliding plate (201).

2. The glue injection machine needle anti-blocking device according to claim 1, characterized in that: The transmission assembly (203) includes an eccentric wheel (2031), which is fixedly connected to the output end of the drive motor (202). A rotating ring (2032) is rotatably connected to the outer wall of the eccentric wheel (2031). A connecting rod (2033) is fixedly connected to the bottom of the outer wall of the rotating ring (2032). Clamping blocks (2034) are provided on both the left and right sides of the connecting rod (2033). Both clamping blocks (2034) are fixedly connected to the bottom of the front side of the outer wall of the sliding plate (201).

3. The glue injection machine needle anti-blocking device according to claim 2, characterized in that: The reciprocating assembly (204) includes a connecting block (2041), the top of which is rotatably connected to the bottom of the connecting rod (2033). A connecting strip (2042) is fixedly connected to the front side of the outer wall of the connecting block (2041), and a brush head (2043) is fixedly connected to the top of the connecting strip (2042).

4. The glue injection machine needle anti-blocking device according to claim 1, characterized in that: The lifting mechanism (3) includes a rack (301), which is fixedly connected to the upper middle part of the base (1). Slide rails (302) are provided on both the left and right sides of the rack (301). The two slide rails (302) are fixedly connected to the front side of the upper middle part of the base (1). The top and bottom ends of the rear side of the rack (301) are meshed with ratchet assemblies (303). A surrounding plate (304) is fixedly connected to the middle rear side of the base (1).

5. The glue injection machine needle anti-blocking device according to claim 4, characterized in that: The ratchet assembly (303) includes a limiting ratchet (3031), which is rotatably connected to the top and bottom of the middle part of the base (1), and a spring (3032) is fixedly connected to the front side of the limiting ratchet (3031).

6. The glue injection machine needle anti-blocking device of claim 1, wherein: A limiting baffle (4) is fixedly connected to the front side of the lower middle part of the base (1), and a waste liquid tank (7) is provided on the front side of the limiting baffle (4).

7. The glue injection machine needle anti-blocking device according to claim 6, characterized in that: The base (1) is provided with a needle body (5) on the front side, and the waste liquid tank (7) is provided at the bottom of the needle body (5).

8. The glue injection machine needle anti-blocking device of claim 1, wherein: A motor housing (6) is fixedly connected to the top rear side of the sliding plate (201), and the drive motor (202) is installed on the rear side of the sliding plate (201) through the motor housing (6).

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