Rotary glue spraying gun with multiple sealing structures

Abstract

The utility model relates to the technical field of glue spraying guns, in particular to a rotary glue spraying gun with a multi-sealing structure. The rotary drum penetrates through the interior of the gun base, and the rotary drum is rotationally connected with the gun base; the air inlet and glue inlet runner is arranged on the gun base, is perpendicular to the axis of the rotary drum, and is rotationally connected with an inner cavity of the rotary drum; the rotary drum is connected with the gun base through multiple sealing rings, and the multiple sealing rings are distributed on the two sides of the rotary connecting position of the air and glue inlet flow channel and an inner cavity of the rotary drum. Compared with rotary transmission through one rotary drum and conveying of glue liquid and compressed air, the transmission mode is changed, the transmission efficiency is improved, transmission is more stable, and the service life of the gun base is prolonged. And meanwhile, sliding sealing in the prior art is changed into rotating sealing, a multi-sealing structure replaces one-time sealing, and the sealing effect is enhanced.

Description

Technical Field

[0001] This application relates to the field of glue spray gun technology, and in particular to a rotary glue spray gun with a multi-seal structure. Background Technology

[0002] A rotary glue gun is a precision device used in automated or semi-automated glue application processes, widely applied in automotive manufacturing, electronic packaging, furniture assembly, and packaging industries. Its core function is to uniformly spray adhesives (such as hot melt adhesives, UV adhesives, epoxy resins, etc.) onto target areas with complex curved surfaces, irregular surfaces, or narrow spaces through controlled rotary motion.

[0003] Traditional rotary glue guns employ multi-axis drive. One axis serves as the drive shaft, which propels the rotating shaft via a gear set. Another rotating shaft handles the delivery of glue and compressed gas, and houses the valve body. This design necessitates a sliding seal between the rotating shaft and the valve body, resulting in numerous sealing points that exacerbate leakage. Furthermore, the gear set transmission is susceptible to thermal fatigue at high temperatures, leading to increased wear and deformation. This project aims to develop a rotary glue gun with a multi-seal structure to address these issues. Utility Model Content

[0004] In view of at least one of the above technical problems, this application provides a rotary glue gun with a multi-seal structure, which solves the above problems by adopting the following technical solution.

[0005] According to one aspect of this application, a rotary glue gun with a multi-seal structure is provided, comprising:

[0006] Gun mount;

[0007] A rotating cylinder, extending through the gun holder and rotatably connected to it, has a nozzle mounting end at one end and a drive connection end at the other; and

[0008] An air inlet and glue inlet channel is provided on the gun holder and is perpendicular to the axis of the rotating drum. The air inlet and glue inlet channel is rotatably connected to the inner cavity of the rotating drum.

[0009] The rotating drum and the gun base are connected by multiple sealing rings, which are distributed on both sides of the rotating connection between the air inlet and glue inlet channels and the inner cavity of the rotating drum.

[0010] Preferably, an annular guide groove is provided in the middle of the rotating drum, and an air inlet and glue inlet hole is provided at the bottom of the guide groove. The air inlet and glue inlet channel is rotatably connected to the inner cavity of the rotating drum through the guide groove and the air inlet and glue inlet hole.

[0011] Preferably, multiple air inlet and glue inlet holes are provided, and the multiple air inlet and glue inlet holes are equidistantly distributed at the bottom of the guide groove.

[0012] Preferably, the multiple sealing rings include a third sealing ring and a fourth sealing ring, which are symmetrically arranged on both sides of the guide groove to form a first sealing structure.

[0013] Preferably, the rotating drum is provided with two sealing ring mounting grooves, which are symmetrically arranged on both sides of the guide groove, and are used to install the third sealing ring and the fourth sealing ring respectively.

[0014] Preferably, the multiple sealing rings further include a first sealing ring and a second sealing ring, which are disposed on both sides of the third sealing ring and the fourth sealing ring to form a second sealing structure.

[0015] Preferably, a valve body is connected to one side of the gun holder, and the output end of the valve body is connected to the air inlet and glue inlet channel.

[0016] Preferably, the rotary drum is also rotatably connected to the gun mount via a bearing.

[0017] Preferably, the nozzle mounting end of the rotary drum is provided with external threads for mounting a deflection nozzle.

[0018] Preferably, the drive connection end of the drum is provided with a spline groove for connecting the motor.

[0019] This application has the following technical effects:

[0020] Compared to existing gear transmission solutions, this application reduces the number of shafts, replacing the original two shafts with a single rotating drum for transmission. This single drum transports both adhesive and compressed gas, simplifying the structure and changing the transmission method from gear transmission to direct drive, thus improving transmission efficiency and stability. Furthermore, it changes the sealing object from sealing the valve body to sealing the rotating drum, better meeting the operational requirements of the glue gun. Additionally, it replaces the sliding seal in existing solutions with a rotary seal, and the multiple sealing structure replaces the single seal, enhancing the sealing effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of this application;

[0023] Figure 2 This is the front view in this application;

[0024] Figure 3 This is a front view of the internal structure of the gun mount in this application;

[0025] Figure 4 This is a perspective view of the internal structure of the gun mount in this application;

[0026] Figure 5 This is a perspective view of the rotating cylinder in this application;

[0027] Figure 6 This is another perspective view in this application.

[0028] Figure label:

[0029] 1. Gun base; 11. Air and glue inlet channel; 2. Rotary drum; 21. Nozzle mounting end; 22. Drive connection end; 23. Air and glue inlet hole; 24. Sealing ring mounting groove; 25. Flow guide groove; 3. First sealing ring; 4. Second sealing ring; 5. Third sealing ring; 6. Fourth sealing ring; 7. Valve body. Detailed Implementation

[0030] Please see Figures 1 to 6 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and objectives of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the technical terms used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this application.

[0032] In one embodiment of this application, such as Figures 1-6 As shown, a rotary glue gun with a multi-seal structure is provided, comprising:

[0033] Gun mount 1;

[0034] Rotary cylinder 2, which extends through the gun base 1 and is rotatably connected to the gun base 1, has a nozzle mounting end 21 at one end and a drive connection end 22 at the other end; and

[0035] An air inlet and glue inlet channel 11 is provided on the gun holder 1, and the air inlet and glue inlet channel 11 is perpendicular to the axis of the rotating drum 2, and the air inlet and glue inlet channel 11 is rotatably connected to the inner cavity of the rotating drum 2.

[0036] The rotating cylinder 2 and the gun base 1 are connected by multiple sealing rings, which are distributed on both sides of the rotating connection between the air inlet and glue inlet channel 11 and the inner cavity of the rotating cylinder 2.

[0037] It should be noted that the gun holder 1 serves as the basic frame of the glue spray gun, through which the rotating cylinder 2 passes and can rotate. One end is provided with a nozzle mounting end 21 for mounting the nozzle, and the other end is provided with a drive connection end 22 for connecting the drive device to realize the rotating glue spraying function of the nozzle. The air and glue inlet channel 11 is set on the gun holder 1, perpendicular to the axis of the rotating cylinder 2, and rotatably connected to the inner cavity of the rotating cylinder 2. It is used to transport glue and compressed gas. The rotating cylinder 2 and the gun holder 1 are connected by multiple sealing rings. The multiple sealing rings are distributed on both sides of the rotatable connection between the air and glue inlet channel 11 and the inner cavity of the rotating cylinder 2, which plays a sealing role and prevents glue and compressed gas leakage. Through the above structural design, the various functional components of the glue spray gun are combined. The basic glue spraying and rotation functions of the glue spray gun are realized through a single rotating cylinder 2. At the same time, the setting of multiple sealing rings ensures sealing performance and improves the reliability and service life of the glue spray gun.

[0038] Specifically, the rotating drum 2 rotates inside the gun holder 1, and the drive connection end 22 is connected to a motor and other drive devices to drive the rotating drum 2 to rotate. The nozzle mounting end 21 is used to install the nozzle for spraying glue. The air and glue inlet channel 11 is responsible for delivering the glue and compressed gas to the inner cavity of the rotating drum 2. Multiple sealing rings keep the drum sealed during rotation to prevent fluid leakage.

[0039] Compared to existing gear transmission solutions, the number of shafts is reduced, integrating the original two shafts into a single rotating drum 2, simplifying the structure and changing the transmission method from gear transmission to direct drive, improving transmission efficiency and making the transmission more stable. Furthermore, the sealing object has been changed from sealing the valve body 7 to sealing the rotating drum 2, which better meets the working requirements of the glue spray gun. At the same time, the sliding seal in the existing technical solution has been changed to a rotary seal, and a multi-seal structure has replaced a single seal, enhancing the sealing effect.

[0040] In one embodiment of this application, such as Figures 3-5 As shown, an annular guide groove 25 is provided in the middle of the rotating drum 2, and an air inlet and glue inlet hole 23 is provided at the bottom of the guide groove 25. The air inlet and glue inlet channel 11 is rotatably connected to the inner cavity of the rotating drum 2 through the guide groove 25 and the air inlet and glue inlet hole 23.

[0041] It should be noted that the function of the guide groove 25 is to guide the adhesive and compressed gas smoothly into the inner cavity of the rotating drum 2, while the air inlet and adhesive inlet hole 23 is the channel for fluid entry. This design optimizes the connection between the air inlet and adhesive inlet channel 11 and the inner cavity of the rotating drum 2, allowing the adhesive and compressed gas to enter during the rotation of the rotating drum 2, ensuring the stability and uniformity of the adhesive spraying. After the adhesive and compressed gas flow out from the air inlet and adhesive inlet channel 11, they first enter the guide groove 25. Under the guidance of the guide groove 25, they enter the inner cavity of the rotating drum 2 evenly through the air inlet and adhesive inlet hole 23, providing a stable fluid supply for the nozzle to spray adhesive.

[0042] In one embodiment of this application, such as Figures 3-5 As shown, in order to avoid problems such as uneven or intermittent glue spraying caused by insufficient flow or uneven fluid distribution of a single air inlet and glue outlet 23, and to improve the working efficiency and glue spraying quality of the glue spraying gun, multiple air inlet and glue outlets 23 are provided, and the multiple air inlet and glue outlets 23 are equally distributed at the bottom of the guide groove 25.

[0043] Specifically, multiple air and glue inlet holes 23 can increase the amount of fluid entering, and the equidistant distribution ensures the uniformity of fluid entering the inner cavity of the rotating drum 2, thereby improving the conveying efficiency of glue and compressed gas, making the glue spraying more uniform and stable, and further improving the glue spraying quality.

[0044] In one embodiment of this application, such as Figures 3-5 As shown, the multiple sealing rings include a third sealing ring 5 and a fourth sealing ring 6, which are symmetrically arranged on both sides of the guide groove 25 to form a first sealing structure.

[0045] It should be noted that the third sealing ring 5 and the fourth sealing ring 6 are tightly fitted onto the contact surfaces of the guide groove 25 and the gun holder 1 on both sides. During the rotation of the rotating drum 2, they prevent fluid from seeping out from this area, thus achieving a sealing function. The third sealing ring 5 and the fourth sealing ring 6 are mainly used to prevent fluid leakage from the connection between the guide groove 25 and the gun holder 1. When the glue gun is running, the rotating drum 2 continues to rotate, and the third sealing ring 5 and the fourth sealing ring 6 always maintain a tight fit with the contact surface to prevent fluid leakage. Even under conditions of fluid pressure changes or vibration of the rotating drum 2, the sealing effect can be maintained through its own elastic deformation, thereby solving the problem of poor sealing in the moving parts of existing glue guns. Compared with the existing sliding seal design, the added first sealing structure greatly improves the sealing reliability.

[0046] In one embodiment of this application, the rotating drum 2 is provided with two sealing ring mounting grooves 24, which are symmetrically arranged on both sides of the guide groove 25, and are used to install the third sealing ring 5 and the fourth sealing ring 6 respectively.

[0047] It should be noted that by machining a sealing ring mounting groove 24 of a specific shape on the rotating drum 2, the third sealing ring 5 and the fourth sealing ring 6 are embedded in the groove. The shape and size of the sealing ring mounting groove 24 match the third sealing ring 5 and the fourth sealing ring 6, which can restrict the movement of the third sealing ring 5 and the fourth sealing ring 6, so that they always remain in the correct position during the rotation of the rotating drum 2, thus achieving a good seal.

[0048] Specifically, when installing the glue gun, the third sealing ring 5 and the fourth sealing ring 6 are placed into their respective sealing ring mounting grooves 24. Then, the rotating cylinder 2 is installed in the gun holder 1. During the operation of the glue gun, the third sealing ring 5 and the fourth sealing ring 6, under the constraint of the sealing ring mounting grooves 24, always maintain good contact with the gun holder 1 and perform a sealing function. This avoids the sealing failure problem caused by improper installation of the third sealing ring 5 and the fourth sealing ring 6, improves the assembly quality and sealing reliability of the glue gun, and reduces the risk of leakage caused by improper installation.

[0049] In one embodiment of this application, such as Figures 3-5 As shown, the multi-seal ring also includes a first seal ring 3 and a second seal ring 4. The first seal ring 3 and the second seal ring 4 are disposed on both sides of the third seal ring 5 and the fourth seal ring 6 to form a second sealing structure.

[0050] It should be noted that the first sealing ring 3 and the second sealing ring 4 form sealing barriers on both sides of the third sealing ring 5 and the fourth sealing ring 6, respectively. When fluid attempts to leak from the connection between the rotating drum 2 and the gun holder 1, it needs to break through these two sealing structures in sequence, thereby greatly reducing the possibility of leakage. During the rotation of the rotating drum 2, the four sealing rings work together to prevent fluid leakage through their own elastic deformation and tight fit. The double sealing structure greatly improves the sealing performance of the glue gun, effectively prevents the leakage of glue and compressed gas, and improves the reliability and service life of the glue gun.

[0051] Specifically, when the glue gun is running, the rotating drum 2 rotates continuously, and the first sealing ring 3, the second sealing ring 4, the third sealing ring 5 and the fourth sealing ring 6 work together to form a double seal. Even if one of the sealing rings experiences slight wear or a decrease in sealing performance, the other sealing rings can still ensure a certain sealing effect and ensure that the fluid does not leak. Compared with the existing single-seal structure, the double-seal structure greatly improves the sealing reliability.

[0052] In one embodiment of this application, a valve body 7 is connected to one side of the gun holder 1, and the output end of the valve body 7 is connected to the air inlet and glue inlet channel 11.

[0053] It should be noted that the valve body 7 is equipped with control components, including a valve stem, inlet and outlet channels and a drive device. Through these components, the flow area or pressure of the fluid can be changed, thereby controlling the flow rate and pressure of the adhesive and compressed gas. After the fluid is output from the valve body 7, it enters the inner cavity of the rotating drum 2 through the air inlet and adhesive outlet channel 11 to realize the adhesive spraying operation.

[0054] Specifically, before using the glue gun, adjust valve body 7 according to the glue application requirements to set appropriate fluid flow and pressure. After starting the glue gun, the glue and compressed gas are output from valve body 7, enter the inner cavity of the rotating drum 2 through the air and glue inlet channel 11, and then are sprayed out from the nozzle. During the glue application process, valve body 7 can be adjusted at any time according to the actual situation to change the glue application parameters.

[0055] In one embodiment of this application, the rotating drum 2 is also rotatably connected to the gun holder 1 via a bearing.

[0056] It should be noted that the function of the bearing is to reduce the friction between the rotating drum 2 and the gun holder 1, so that the rotating drum 2 can rotate more smoothly, and at the same time improve the rotational accuracy and stability of the rotating drum 2. Specifically, when the glue spray gun is running, the drive device drives the rotating drum 2 to rotate. The rotating drum 2 rotates in the gun holder 1 through the bearing. The rolling elements of the bearing continuously roll between the inner and outer rings, reducing the friction between the rotating drum 2 and the gun holder 1, so that the rotating drum 2 can rotate smoothly and efficiently, and transmit power to the nozzle for glue spraying. Compared with the existing structure with multiple gear transmissions, the number of bearings used is reduced.

[0057] In one embodiment of this application, the nozzle mounting end 21 of the rotating drum 2 is provided with an external thread for mounting a deflection nozzle.

[0058] It should be noted that the external thread design facilitates the installation and removal of the nozzle. Users can replace it with different types of deflection nozzles according to different glue spraying needs. Specifically, when it is necessary to replace the nozzle, first turn off the glue gun to stop the fluid supply, then use a tool to unscrew the nozzle from the rotating drum 2, replace it with the required deflection nozzle, and then tighten the new nozzle onto the rotating drum 2. After installation, start the glue gun, and you can use the new nozzle for glue spraying operations.

[0059] In this application, the nozzle mounting end 21 of the rotating drum 2 is not limited to mounting the deflection nozzle through external threads, but can also be connected through other interface connectors such as clips and screws.

[0060] In one embodiment of this application, the drive connection end 22 of the rotating drum 2 is provided with a spline groove for connecting a motor.

[0061] It should be noted that the spline groove design enables a reliable connection between the rotating drum 2 and the motor, transmitting a large torque and ensuring that the rotating drum 2 can rotate stably under the drive of the motor. Specifically, when installing the glue spray gun, the spline on the motor output shaft is inserted into the spline groove of the drive connection end 22 of the rotating drum 2, ensuring that the spline and spline groove are fully engaged. After the motor is started, the motor's power is transmitted to the rotating drum 2 through the connection between the spline and the spline groove. The rotating drum 2 begins to rotate under the drive of the motor, driving the nozzle to perform the glue spraying operation.

[0062] The above are merely preferred embodiments of this application and do not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.

Claims

1. A rotary glue gun having a multiple seal structure, characterized by, include: Gun mount (1); A rotating cylinder (2) extends through the gun holder (1) and is rotatably connected to the gun holder (1). One end of the rotating cylinder (2) is provided with a nozzle mounting end (21), and the other end is provided with a drive connection end (22). An air inlet and glue inlet channel (11) is provided on the gun holder (1), and the air inlet and glue inlet channel (11) is perpendicular to the axis of the rotating drum (2), and the air inlet and glue inlet channel (11) is rotatably connected to the inner cavity of the rotating drum (2). The rotating cylinder (2) and the gun base (1) are connected by multiple sealing rings, which are distributed on both sides of the rotating connection between the air inlet and glue inlet channel (11) and the inner cavity of the rotating cylinder (2).

2. The rotary glue gun with multiple sealing structure according to claim 1, characterized in that: The rotating drum (2) has an annular guide groove (25) in the middle, and an air inlet and glue inlet hole (23) is provided at the bottom of the guide groove (25). The air inlet and glue inlet channel (11) is rotatably connected to the inner cavity of the rotating drum (2) through the guide groove (25) and the air inlet and glue inlet hole (23).

3. The rotary glue gun with multiple sealing structure according to claim 2, characterized in that: Multiple air inlet and glue inlet holes (23) are provided, and the multiple air inlet and glue inlet holes (23) are equidistantly distributed at the bottom of the guide groove (25).

4. The rotary glue gun with multiple sealing structure according to claim 3, characterized in that: The multiple sealing rings include a third sealing ring (5) and a fourth sealing ring (6), which are symmetrically arranged on both sides of the guide groove (25) to form a first sealing structure.

5. The rotary glue gun with multiple sealing structure according to claim 4, characterized in that: The rotating drum (2) is provided with two sealing ring mounting grooves (24), which are symmetrically arranged on both sides of the guide groove (25) and are used to install the third sealing ring (5) and the fourth sealing ring (6) respectively.

6. The rotary glue gun with multiple sealing structure according to claim 4, characterized in that: The multiple sealing rings also include a first sealing ring (3) and a second sealing ring (4), which are disposed on both sides of the third sealing ring (5) and the fourth sealing ring (6) to form a second sealing structure.

7. The rotary glue gun with multiple sealing structure according to claim 1, characterized in that: A valve body (7) is connected to one side of the gun holder (1), and the output end of the valve body (7) is connected to the air inlet and glue inlet channel (11).

8. A rotary glue gun with a multi-seal structure according to claim 1, characterized in that: The rotating drum (2) is also rotatably connected to the gun mount (1) via a bearing.

9. The rotary glue gun with multiple sealing structure according to claim 1, characterized in that: The nozzle mounting end (21) of the rotating drum (2) is provided with an external thread for mounting a deflection nozzle.

10. The rotary glue gun with multiple sealing structure according to claim 1, characterized in that: The drive connection end (22) of the rotating drum (2) is provided with a spline groove for connecting the motor.

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