A glue gun with a quick nozzle replacement device

Abstract

This invention provides a glue gun with a quick nozzle changing device, including a glue gun body, a metering component on the glue gun body, a central tube with a glue outlet on the central tube, and a quick nozzle changing device. The quick nozzle changing device includes a housing, a switching shaft rotatably and slidably mounted on the housing, and a drive block slidably mounted on the housing. The drive block can reciprocate vertically and is fixedly connected to the switching shaft by a connecting block. The quick nozzle changing device also includes a drive assembly, which is drively connected to the drive block and the switching shaft. One end of the switching shaft is connected to multiple placement plates, on which nozzles are fixed. This invention, by setting up a quick nozzle changing device and utilizing the drive assembly to drive the switching shaft in a combined lifting and rotating motion, achieves automatic and rapid nozzle changing.

Description

Technical Field

[0001] This utility model relates to the field of glue gun technology, specifically a glue gun with a quick nozzle replacement device. Background Technology

[0002] Glue guns, as a common tool, are widely used in construction, decoration, industrial production, and daily maintenance to precisely apply various adhesives, such as silicone glue, polyurethane glue, and epoxy resin glue. Their core function is to expel the adhesive from a reservoir by squeezing, and the shape and flow rate of the adhesive are controlled by the nozzle (or applicator nozzle) at the front end. Glue guns are particularly widely used in the automotive manufacturing and repair industry, for example, in body sealing, glass installation, component bonding, sound insulation, and anti-corrosion coating.

[0003] In the automotive manufacturing process, there are extremely precise and diverse requirements for the shape of the sealing strips to meet the functional and aesthetic needs of different parts. In areas such as window glass installation, door seals, and the connection between the hood and the body, narrow, uniform linear sealing strips are needed for precise sealing to prevent moisture and dust from entering and to reduce wind noise. This typically requires the use of small-diameter round or oval nozzles.

[0004] For bonding and fixing body panels and interior trim parts, as well as sealing battery packs in new energy vehicles, wide, flat, or fan-shaped adhesive strips are required to ensure sufficient bonding area and strength. In this case, flat or fan-shaped adhesive nozzles are essential.

[0005] When applying vibration damping or sound insulation materials to areas such as the underside of the vehicle body and wheel arches, it may be necessary to spray a gel layer of a specific thickness or shape to achieve the best results.

[0006] Therefore, to meet the complex and ever-changing construction tasks and quality standards in the automotive industry, operators often need to frequently change nozzles of different shapes and sizes during production or maintenance. However, most traditional glue gun nozzles are connected to the glue gun body via a threaded connection. Within automotive production lines, nozzles need to be changed frequently according to different processes. This time-consuming and laborious screwing operation significantly slows down the production pace and reduces overall work efficiency. Especially in highly automated production lines, manual nozzle changing has become a bottleneck. Utility Model Content

[0007] The purpose of this invention is to provide a glue gun with a quick nozzle replacement device to solve the problems of cumbersome and inefficient nozzle replacement operation of traditional glue guns mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A glue gun with a quick nozzle replacement device includes a glue gun body, a metering component on the glue gun body, a central tube on the glue gun body, and a glue outlet on the central tube. The feature is that it is also equipped with a quick nozzle replacement device.

[0010] The quick nozzle replacement device includes a housing, on which a switching shaft is rotatably and slidably mounted, and on which a drive block is also slidably mounted, the drive block being capable of reciprocating in a vertical direction, and the drive block being fixedly connected to the switching shaft via a connecting block; the quick nozzle replacement device also includes a drive assembly, which is kinetically connected to the drive block and the switching shaft.

[0011] One end of the switching shaft is connected to multiple placement plates, and each placement plate has a glue nozzle fixed on it.

[0012] Furthermore, the drive assembly includes a rotatable wheel mounted on the housing and a swingable transmission rod. The wheel has a guide groove, and the transmission rod has a linkage part, which includes a guide protrusion slidably disposed within the guide groove. The transmission rod also has a drive protrusion, and the drive block has a horizontally extending movable groove, in which the drive protrusion slidably disposed.

[0013] Furthermore, a first bevel gear is coaxially arranged on the rotating wheel, and the drive assembly also includes a second bevel gear, with the first bevel gear and the second bevel gear meshing with each other; a non-complete gear is coaxially connected to the second bevel gear, and a switching gear is slidably fitted on the outer peripheral wall of the switching shaft, with the switching gear meshing with the non-complete gear.

[0014] Furthermore, a flat key is provided between the switching gear and the switching shaft.

[0015] Furthermore, the number of placement pieces is four, and the included angle between the placement pieces is 90 degrees.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention achieves automatic and rapid nozzle switching by incorporating a quick nozzle replacement device. The device utilizes a drive assembly to propel a switching shaft through a combination of lifting and rotating motions. When a nozzle replacement is needed, the drive assembly first lowers the switching shaft, disengaging the currently used nozzle from the adhesive outlet of the central tube. Then, it rotates the switching shaft by a preset angle, positioning the holder containing the target nozzle directly below it. Finally, the drive assembly raises the switching shaft, aligning and sealing the new nozzle with the adhesive outlet. The entire process eliminates the need for manual tightening, significantly reducing replacement time, improving production efficiency, and lowering worker workload. It is particularly suitable for automated production lines, solving the problem of nozzle replacement being a bottleneck in existing technologies. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0020] Figure 2 This is a cross-sectional view of a quick nozzle replacement device according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the driving component in one embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Glue gun body; 2. Metering component; 3. Central tube; 4. Quick nozzle replacement device; 5. Housing; 6. Switching shaft; 7. Drive block; 8. Connecting block; 9. Drive assembly; 10. Placement plate;

[0024] 11. Nozzle; 12. Rotary wheel; 13. Transmission rod; 14. Guide groove; 15. Linkage part; 16. Guide protrusion; 17. Drive protrusion; 18. Movable groove; 19. First bevel gear;

[0025] 20. Second bevel gear; 21. Incomplete gear; 22. Switching gear. Detailed Implementation

[0026] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0027] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0028] Please see Figures 1-3 This invention provides a glue gun with a quick nozzle replacement device, comprising a glue gun body 1, a metering component 2 disposed on the glue gun body 1, and a central tube 3. The glue liquid flows out through the central tube 3 under the control of the metering component 2. This invention includes a quick nozzle replacement device 4 for quickly replacing the nozzle 11.

[0029] The quick nozzle changing device 4 includes a fixed housing 5. A switching shaft 6 is slidable along its axial direction (vertical direction) and can rotate about its axis. Multiple placement plates 10 are connected to the lower end of the switching shaft 6, each placement plate 10 having a nozzle 11 of a different size or shape fixedly mounted on it. In this embodiment, four placement plates 10 are preferably provided, and they are at 90-degree angles to each other, allowing for the installation of four different nozzles 11.

[0030] The quick nozzle changing device 4 also includes a drive block 7, which is constrained within the housing 5 and can only slide vertically. The drive block 7 is fixedly connected to the switching shaft 6 via a connecting block 8, so the vertical movement of the drive block 7 directly drives the switching shaft 6 to perform a synchronous vertical movement.

[0031] The core of the quick nozzle changing device 4 is the drive assembly 9, which is responsible for generating the switching action. The drive assembly 9 includes a rotating wheel 12 driven by an external power source (e.g., a motor, not shown). The rotating wheel 12 has a closed guide groove 14 with a specific trajectory. One end of a transmission rod 13 is provided with a linkage part 15, and a guide protrusion 16 on the linkage part 15 is slidably embedded in the guide groove 14. The other end of the transmission rod 13 is provided with a drive protrusion 17, which is slidably embedded in a horizontal movable groove 18 on the side of the drive block 7.

[0032] When the rotating wheel 12 rotates, the guide protrusion 16 moves along the trajectory of the guide groove 14. Since the radial position of the guide groove 14 changes, this forces the transmission rod 13 to swing at one of its fulcrums. The swinging of the transmission rod 13 causes the drive protrusion 17 at its other end to exert a thrust on the drive block 7 within the movable groove 18. Because the drive block 7 is restricted to vertical movement only, this horizontal thrust is converted into a vertical lifting motion of the drive block 7. Thus, the switching shaft 6 and the nozzle 11 on it are driven to rise and fall together via the connecting block 8. This lifting process achieves the disengagement and engagement of the nozzle 11 with the glue outlet at the lower end of the central tube 3.

[0033] To achieve rotational switching, the drive assembly 9 also includes a gear transmission mechanism. A first bevel gear 19 is coaxially mounted on the rotating wheel 12. The first bevel gear 19 meshes with a second bevel gear 20, transmitting the rotation of the rotating wheel 12 to the second bevel gear 20. A partial gear 21 is coaxially fixedly connected to the second bevel gear 20. The partial gear 21 is a special type of gear with teeth distributed only on a portion of its circumference.

[0034] A switching gear 22 is slidably fitted onto the outer peripheral wall of the switching shaft 6 via a key connection. The key ensures torque transmission between the switching gear 22 and the switching shaft 6, while allowing the switching shaft 6 to slide axially relative to the switching gear 22. The switching gear 22 meshes with the incomplete gear 21.

[0035] The entire process for replacing nozzle 11 is as follows:

[0036] Glue gun movement: The glue gun body 1 moves to the working range of the quick nozzle replacement device 4 under the drive of the robotic arm, and the placement piece 10 abuts against the nozzle 11 to be replaced.

[0037] Descending and Disengaging: External power drives the rotating wheel 12 to begin rotating. Within a specific angular range of rotation of the rotating wheel 12, the trajectory of the guide groove 14 forces the transmission rod 13 to swing, pushing the drive block 7 downward. The drive block 7 drives the switching shaft 6 to descend synchronously via the connecting block 8, causing the currently used nozzle 11 to separate from the glue outlet of the central tube 3. A quick-connect valve is provided at the glue outlet; when the nozzle 11 separates from the glue outlet of the central tube 3, the glue outlet will automatically close to prevent glue overflow. Its structure and principle are known to those skilled in the art and will not be described in detail here.

[0038] Rotational Positioning: After the switching shaft 6 descends to the predetermined position, the rotating wheel 12 continues to rotate. At this time, the teeth of the incomplete gear 21 begin to mesh with the switching gear 22, driving the switching gear 22 to rotate. Due to the keyed connection, the switching shaft 6 also rotates 90 degrees. This rotates the next target nozzle 11 directly below the central tube 3. The design of the incomplete gear ensures that the rotational action only occurs after the switching shaft descends.

[0039] Rising engagement: As the rotating wheel 12 continues to rotate, the trajectory of the guide groove 14 acts in the opposite direction on the transmission rod 13, causing the drive block 7 to rise. The drive block 7 drives the switching shaft 6 to rise synchronously, tightly connecting the new nozzle 11 with the glue outlet of the central tube 3 and forming a seal, completing one switching operation.

[0040] In summary, this utility model, through its ingenious mechanical linkage design, transforms a continuous rotary input into a composite action of "descending-rotating-rising," enabling rapid and automatic replacement of the nozzle 11. This solves the technical pain point of manual nozzle replacement in the prior art, which is time-consuming, labor-intensive, and affects production efficiency.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A glue gun with a quick nozzle replacement device, comprising a glue gun body, a metering component disposed on the glue gun body, and a central tube disposed on the central tube, characterized in that, It is also equipped with a quick nozzle replacement device; The quick nozzle replacement device includes a housing, on which a switching shaft is rotatably and slidably mounted, and on which a drive block is also slidably mounted, the drive block being capable of reciprocating in a vertical direction, and the drive block being fixedly connected to the switching shaft via a connecting block; the quick nozzle replacement device also includes a drive assembly, which is kinetically connected to the drive block and the switching shaft. One end of the switching shaft is connected to multiple placement plates, and each placement plate has a glue nozzle fixed on it.

2. The glue gun with quick glue nozzle replacement device according to claim 1, characterized in that, The drive assembly includes a rotatable wheel mounted on the housing and a swingable transmission rod. The wheel is provided with a guide groove, and the transmission rod is provided with a linkage part. The linkage part includes a guide protrusion, which is slidably disposed in the guide groove. The transmission rod is also provided with a driving protrusion, and the driving block is provided with a movable groove extending in the horizontal direction. The driving protrusion is slidably disposed in the movable groove.

3. The glue gun with quick glue nozzle replacement device according to claim 2, characterized in that, A first bevel gear is coaxially arranged on the rotating wheel, and the drive assembly further includes a second bevel gear, wherein the first bevel gear and the second bevel gear mesh with each other; The second bevel gear is coaxially connected to a non-complete gear, and a switching gear is slidably fitted on the outer peripheral wall of the switching shaft, the switching gear meshing with the non-complete gear.

4. The glue gun with quick glue nozzle replacement device according to claim 3, characterized in that, A flat key is provided between the switching gear and the switching shaft.

5. The glue gun with quick glue nozzle replacement device according to claim 1, wherein, The number of placement pieces is four, and the included angle between the placement pieces is 90 degrees.

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