A kind of glueing structure and trademark paper glueing machine

Abstract

The utility model belongs to cigarette manufacturing technical field discloses a kind of gluing structure and trademark paper gluing machine.The utility model's gluing structure is by being provided with adjusting assembly outside machine case, operator does not need to disassemble machine case or adjust internal power transmission mechanism, only needs to rotate adjusting assembly outside machine case, it can directly, independently change the circumferential initial phase of gluing assembly, to realize the quick, accurate adjustment of glue point position, effectively solve the problem of tedious adjustment process, time-consuming and labor-consuming in prior art, significantly improve equipment maintenance efficiency and production flexibility.The trademark paper gluing machine provided by the utility model, operator does not need to disassemble machine case or adjust internal driving mechanism, only needs to operate adjusting assembly outside machine case, it can quickly, accurately complete the independent adjustment of gluing phase, to significantly improve the maintenance efficiency and production flexibility of complete machine, completely solve the problem of adjustment difficulty, long downtime caused by gluing position deviation.

Description

Technical Field

[0001] This utility model relates to the field of cigarette manufacturing technology, and in particular to a coating structure and a label paper coating machine. Background Technology

[0002] In the cigarette packaging process, the application and pasting of adhesive to the label paper is one of the key steps to ensure the quality of the cigarette pack. The purpose is to precisely apply a fixed amount of adhesive to the label paper at predetermined locations during its transport, so that specific parts of the label paper can be firmly pasted during subsequent folding, ultimately ensuring that the finished cigarette pack has a square and aesthetically pleasing shape.

[0003] In existing technologies, a transmission system is typically used to drive the coating sheet to rotate, thereby completing the coating operation. The coating sheet and the transmission system are fixedly connected to transmit power, ensuring it contacts the label paper at a fixed phase angle. In actual production, changes in product brand or other uncontrollable factors often cause the adhesive dots on the label paper to shift. Adhesive dots positioned too far inwards or to the edge directly lead to problems such as side openings and poor adhesion after folding the label paper, severely affecting the sealing, appearance quality, and product grade of the cigarette pack. Therefore, adjustments are necessary when adhesive dot position shifts are detected. However, because the coating sheet and the power transmission mechanism are fixedly connected, they lack convenient and independent circumferential phase adjustment capabilities. Once the adhesive dot position needs adjustment, the installation phase of multiple gears or shafts within the entire transmission system must be adjusted.

[0004] However, adjusting the glue dots requires opening the equipment housing and is operated by at least two maintenance personnel. It involves repeated shutdowns, adjustments, and verifications before the glue dots can be correctly positioned. This method is time-consuming and labor-intensive, resulting in long downtime, low production efficiency, and severely restricting production flexibility and economy.

[0005] Therefore, there is an urgent need for a coating structure to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a gluing structure and a label paper gluing machine to solve the problems of cumbersome gluing phase adjustment process and the need to disassemble the equipment box, so as to achieve fast, accurate and independent adjustment of the gluing point position.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] An adhesive application structure includes a power transmission mechanism disposed inside a chassis and an adhesive application head mechanism disposed outside the chassis.

[0009] The glue application head mechanism includes a drive shaft and synchronous gears, an adjustment assembly, and a glue application assembly, all coaxially arranged with the drive shaft.

[0010] The drive shaft passes through the inside and outside of the chassis and is rotatably connected to the side wall of the chassis. One end of the drive shaft is located inside the chassis and is connected to the power transmission component.

[0011] The synchronous gear is fixedly connected to the drive shaft and is used to transmit the power of the drive shaft;

[0012] The adjusting component is driven between the glue-applying component and the synchronous gear. The adjusting component is circumferentially fixedly connected to the glue-applying component, and the adjusting component can rotate circumferentially relative to the synchronous gear.

[0013] Preferably, the synchronizing gear includes a body and a hub, the hub being coaxially arranged with the body and located on the side of the body away from the adhesive application assembly, and the synchronizing gear being connected to the drive shaft and the adhesive application assembly through the hub.

[0014] Preferably, the hub is cylindrical, and the interior of the hub has a first stepped surface and a second stepped surface. The first stepped surface is fixedly connected to the drive shaft, and the second stepped surface is connected to the adjustment assembly.

[0015] Preferably, the adjustment assembly includes an adjustment disc and a fastener, and at least one of the adjustment disc or the synchronous gear has an arc-shaped adjustment hole, and the fastener can pass through the arc-shaped adjustment hole and lock the adjustment disc and the synchronous gear in place.

[0016] Preferably, the adhesive application assembly includes an adhesive application roller, an adhesive application sheet, and a connecting sleeve. The adhesive application sheet is disposed on the adhesive application roller and is used to apply adhesive to the workpiece to be coated. The connecting sleeve is circumferentially fixedly connected to the adjusting disc.

[0017] Preferably, the adjusting disc is connected to the keyway of the connecting sleeve.

[0018] Preferably, the glue applicator mechanism further includes a limiting component, which includes a clamping member and a positioning bushing. The clamping member is disposed on the outer periphery of the connecting sleeve and can clamp the connecting sleeve circumferentially. The positioning bushing is coaxially sleeved on the drive shaft and cooperates with the inner wall of the glue applicator roller to limit the axial movement of the glue applicator roller.

[0019] Preferably, the glue applicator further includes a bushing assembly, which is connected to the synchronous gear drive and can cooperate with the glue applicator to apply glue to the workpiece.

[0020] Preferably, the liner roller assembly includes a liner roller shaft and a bushing rotatably mounted on the liner roller shaft. A liner roller and a driven gear are fixedly mounted on the bushing, and the driven gear meshes with the synchronous gear.

[0021] A label paper coating machine includes a chassis, a drive mechanism disposed within the chassis, and the aforementioned coating structure. The drive mechanism is connected to the power transmission mechanism of the coating structure.

[0022] The beneficial effects of this utility model are:

[0023] The adhesive application structure provided by this utility model includes a power transmission mechanism disposed inside the chassis and an adhesive application head mechanism disposed outside the chassis. The adhesive application head mechanism includes a drive shaft and a synchronous gear, an adjustment component, and an adhesive application component coaxially disposed with the drive shaft. The drive shaft passes through the inside and outside of the chassis and is rotatably connected to the side wall of the chassis. One end of the drive shaft located inside the chassis is connected to the power transmission component. The synchronous gear is fixedly connected to the drive shaft and is used to transmit power from the drive shaft. The adjustment component is disposed between the adhesive application component and the synchronous gear, and is circumferentially fixedly connected to the adhesive application component, and can rotate circumferentially relative to the synchronous gear. By providing an adjustment component circumferentially fixedly connected to the adhesive application component and capable of circumferential rotation relative to the synchronous gear, the operator can directly and independently change the initial circumferential phase of the adhesive application component simply by rotating the adjustment component outside the chassis, without disassembling the chassis or adjusting the internal power transmission mechanism. This achieves rapid and precise adjustment of the adhesive dot position, effectively solving the problems of cumbersome and time-consuming adjustment procedures in the prior art, and significantly improving equipment maintenance efficiency and production flexibility.

[0024] The trademark paper coating machine provided by this utility model includes a machine casing, a drive mechanism installed inside the machine casing, and the aforementioned coating structure. The drive component is connected to the power transmission mechanism of the coating structure. Operators do not need to disassemble the machine casing or adjust the internal drive mechanism; they only need to operate the adjustment component outside the machine casing to quickly and accurately complete the independent adjustment of the coating phase. This significantly improves the overall machine's maintenance efficiency and production flexibility, completely solving problems such as adjustment difficulties and long downtime caused by coating position deviation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the adhesive coating structure in an embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the glue applicator mechanism in an embodiment of this utility model;

[0027] Figure 3 This is a cross-sectional view of the adjusting component and the adhesive coating component of the adhesive coating structure in an embodiment of this utility model, in a state where they are not connected;

[0028] Figure 4 This is a cross-sectional view of the connection state between the adjustment component and the adhesive coating component in the embodiment of this utility model.

[0029] In the picture:

[0030] 1. Glue applicator mechanism;

[0031] 11. Drive shaft;

[0032] 12. Synchronizing gear; 121. Body section; 122. Hub section; 1221. First stepped surface; 1222. Second stepped surface;

[0033] 13. Adjustment component; 131. Adjustment disc; 132. Fastener; 133. Arc-shaped adjustment hole;

[0034] 14. Glue application assembly; 141. Glue application roller; 142. Glue application sheet; 143. Connecting sleeve;

[0035] 15. Limiting component; 151. Clamping component; 152. Positioning bushing;

[0036] 16. Liner roller assembly; 161. Liner roller; 162. Driven gear;

[0037] 2. Power transmission mechanism. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] In the cigarette packaging process, the efficiency of the label paper coating machine directly determines the final product packaging quality and production efficiency. This system is mainly responsible for sucking the label paper from the paper warehouse and, during the downward conveying process, the coating assembly, mainly composed of coating rollers equipped with coating sheets, evenly applies glue to the areas of the label paper that need to be glued, ultimately making the label paper firmly and accurately pasted in the designated position.

[0043] The glue-applying roller receives rotational power through a power transmission mechanism, causing the glue-applying sheet to periodically contact the surface of the label paper. If there is an error in the installation angle of the glue-applying sheet on the glue-applying roller, or if the phase of the entire glue-applying assembly is mismatched with the label paper feeding rhythm, the glue dot position will shift back and forth along the label paper feeding direction. Of course, other factors may also cause the glue dot position to shift. Specifically, the glue dot will be too close to the edge of the label paper or too far inward, failing to precisely correspond to the preset fold line.

[0044] Because the power transmission mechanism connected to the gluing assembly is usually enclosed within the equipment housing, and the gluing assembly and the power transmission mechanism are mostly fixedly connected, lacking an independent adjustment mechanism, any minor phase adjustment requires disassembling the housing, loosening multiple transmission components, and even adjusting the meshing position of the transmission gears. Furthermore, the label paper gluing machine is relatively large, requiring operators to move back and forth between the two sides of the equipment or requiring multiple operators to work together. This mechanical adjustment method is not only time-consuming and labor-intensive but also relies on the operator's experience and judgment, often requiring multiple cycles of "adjustment-trial run-readjustment" to reach the ideal position, severely impacting equipment utilization and production flexibility.

[0045] Therefore, this utility model discloses an adhesive coating structure, such as... Figures 1 to 4 As shown, the adhesive application structure includes a power transmission mechanism 2 disposed inside the chassis and an adhesive application head mechanism 1 disposed outside the chassis. The adhesive application head mechanism 1 includes a drive shaft 11, a synchronous gear 12 coaxially disposed with the drive shaft 11, an adjustment component 13, and an adhesive application assembly 14. The drive shaft 11 passes through the inside and outside of the chassis and is rotatably connected to the side wall of the chassis, for example, via a bearing. One end of the drive shaft 11 located inside the chassis is connected to the power transmission component. The synchronous gear 12 is fixedly connected to the drive shaft 11 and is used to transmit power from the drive shaft 11. The adjustment component 13 is disposed between the adhesive application assembly 14 and the synchronous gear 12, and is circumferentially fixedly connected to the adhesive application assembly 14, while being able to rotate circumferentially relative to the synchronous gear 12. It is understood that the adjustment component 13, disposed between the adhesive application assembly 14 and the synchronous gear 12, is circumferentially fixedly connected to the adhesive application assembly 14, and is capable of circumferential rotation relative to the synchronous gear 12. This invention creates an independent and adjustable transmission link in the glue coating structure while maintaining continuous power transmission from the drive shaft 11 through the synchronous gear 12. When it is necessary to adjust the glue coating position on the label paper, the operator does not need to disassemble the equipment housing or touch the complex internal power transmission chain. Only the adjustment component 13 needs to be operated directly from outside the housing, causing the glue coating component 14 to rotate relative to the synchronous gear 12 by the required angle, thus directly and accurately adjusting the initial phase of the glue coating sheet 142. This simplifies the previously required "systematic adjustment" of the entire transmission chain into a "local fine-tuning" of the external components of the equipment housing, fundamentally solving the pain points of cumbersome adjustment processes, excessive time consumption, and reliance on multiple people in existing technologies, significantly improving the production efficiency and ease of maintenance of the equipment.

[0046] In some embodiments, such as Figure 2 and Figure 4 As shown, the synchronizing gear 12 includes a body portion 121 and a hub portion 122. The hub portion 122 is coaxially arranged with the body portion 121 and is located on the side of the body portion 121 away from the adhesive application assembly 14. The synchronizing gear 12 is connected to the drive shaft 11 and the adhesive application assembly 14 through the hub portion 122. It can be understood that the addition of the hub portion 122 fundamentally solves the inherent limitations of traditional planar gears in terms of axial positioning accuracy and connection stability. The hub portion 122 has a larger mating surface with the drive shaft 11 to ensure coaxiality and reliability of power transmission. At the same time, it provides an installation reference structure, enabling the adjusting assembly 13 to be precisely positioned and installed with the hub portion 122 as the center, thereby achieving structural installation stability.

[0047] In some embodiments, such as Figure 2 As shown, the hub portion 122 is cylindrical, and its interior is provided with a first stepped surface 1221 and a second stepped surface 1222. The first stepped surface 1221 is fixedly connected to the drive shaft 11, and the second stepped surface 1222 is connected to the adjustment assembly 13. It can be understood that the cylindrical structure of the hub portion 122, through the internal first stepped surface 1221, forms a fixed connection with the drive shaft 11, ensuring the reliability and concentricity of power transmission. The second stepped surface 1222 provides a precise axial positioning reference for the adjustment assembly 13, enabling the adjustment assembly 13 to achieve stable circumferential rotation while maintaining coaxiality. This stepped structure ensures the rigidity of the power transmission path and creates an independent operating space for phase adjustment, while simultaneously achieving transmission stability and convenient adjustment. In some specific embodiments, a ring-shaped boss is provided at a corresponding position on the drive shaft 11, and the end face of this ring-shaped boss forms an axially fitted fit with the first stepped surface 1221 inside the hub portion 122. During assembly, the end face of the annular boss on the drive shaft 11 is tightly abutted against the first stepped surface 1221. Both the annular boss and the first stepped surface 1221 have threaded holes, and locking bolts are used to fix them axially and circumferentially, enabling precise axial positioning of the synchronous gear 12 on the drive shaft 11. The fit between the annular boss and the first stepped surface 1221 not only determines the axial installation position of the synchronous gear 12 but also forms a reliable axial force-bearing support surface, effectively preventing axial movement of the gear during transmission. Simultaneously, it establishes an accurate axial reference for the subsequent installation of the adjustment assembly 13.

[0048] In some embodiments, such as Figure 2As shown, the adjustment assembly 13 includes an adjustment disc 131 and a fastener 132. At least one of the adjustment disc 131 or the synchronous gear 12 has an arc-shaped adjustment hole 133. The fastener 132 can pass through the arc-shaped adjustment hole 133 and lock the adjustment disc 131 and the synchronous gear 12 in place. It can be understood that the adjustment assembly 13 achieves the phase adjustment function through the cooperation of the adjustment disc 131 and the fastener 132. Specifically, in this embodiment, at least one arc-shaped adjustment hole 133 is provided on the adjustment disc 131. In this embodiment, three arc-shaped adjustment holes 133 are provided, all arranged around the axis of the drive shaft 11 and located on the same circumference. The second step surface 1222 of the hub portion 122 of the synchronous gear 12 has a threaded hole at a corresponding position. When it is necessary to adjust the adhesive application phase, the fastener 132 passing through the arc-shaped adjustment hole 133 is first loosened. At this time, the adjustment disc 131 can drive the adhesive application assembly 14 to rotate relative to the synchronous gear 12 around the axis of the drive shaft 11. The rotation angle of the adjusting disc 131 is limited within a preset range by the cooperation of the arc-shaped adjusting hole 133 and the fastener 132. After adjusting to the target phase, the fastener 132 is tightened again to press and fix the adjusting disc 131 and the synchronous gear 12, thus completing the phase adjustment. This structure enables rapid and precise adjustment that can be completed outside the chassis, while maintaining the normal operation of the drive shaft 11 and the synchronous gear 12 during the adjustment process.

[0049] In some embodiments, such as Figure 2 and Figure 3 As shown, the glue application assembly 14 includes a glue application roller 141, a glue application sheet 142, and a connecting sleeve 143. The glue application sheet 142 is disposed on the glue application roller 141 and is used to apply glue to the workpiece to be glued. The connecting sleeve 143 is circumferentially fixedly connected to the adjusting disk 131. It is understood that the workpiece to be glued in this embodiment is a label paper, and the term "label paper" will be used uniformly in the following description. Among them, the connecting sleeve 143, as a key transmission component, forms a circumferential fixed connection with the adjusting disk 131, establishing a stable transmission chain from the adjusting disk 131 to the glue application sheet 142. This connection structure ensures the accurate transmission of the adjustment action, effectively eliminates the cumulative error existing in traditional multi-stage transmission, makes the glue dot phase adjustment accuracy more accurate, and fundamentally solves the problem of glue dot offset at the folded edge of the label paper caused by phase deviation. At the same time, the phase adjustment function (the angle adjustment function of the glue application sheet 142) is separated from the enclosed power transmission mechanism 2. Operators can rotate the entire glue application assembly 14 synchronously via the connecting sleeve 143 by rotating the adjustment disc 131 outside the equipment, thereby achieving precise adjustment of the circumferential phase of the glue application sheet 142. This reduces the adjustment work that originally took 30-40 minutes to less than two minutes, and eliminates the need to disassemble the equipment housing or adjust the internal transmission gears, significantly improving equipment maintenance efficiency.

[0050] In some specific embodiments, the adjusting disc 131 is keyway connected to the connecting sleeve 143. It is understood that the outer circumferential surface of the connecting sleeve 143 is provided with an axially extending keyway, and a flat key that mates with the keyway is fixedly installed on the side wall of the adjusting disc 131. During assembly, as... Figure 3 The state shown is to Figure 4 As shown, align the flat key of the adjusting disc 131 with the keyway on the connecting sleeve 143 and push it axially to complete the assembly. This connection method ensures that the adjusting disc 131 can accurately transmit torque to the connecting sleeve 143 through the cooperation of the flat key and the keyway when rotating, thereby driving the entire adhesive application assembly 14 to rotate synchronously. In addition, the keyway connection structure can also provide precise circumferential positioning, facilitating assembly and disassembly. When it is necessary to replace the adhesive application assembly 14, simply pull the adjusting disc 131 out of the connecting sleeve 143 axially. The connecting sleeve 143 can be a one-piece molded structure.

[0051] In some embodiments, such as Figure 2 As shown, the glue application head mechanism 1 also includes a limiting component 15, which includes a clamping member 151 and a positioning bushing 152. The clamping member 151 is disposed on the outer periphery of the connecting sleeve 143 and can clamp the connecting sleeve 143 circumferentially. The positioning bushing 152 is coaxially sleeved on the drive shaft 11 and cooperates with the inner wall of the glue application roller 141 to limit the axial movement of the glue application roller 141. It can be understood that the clamping member 151 is installed on the outer peripheral surface of the connecting sleeve 143, adopts a split structure and is fastened by bolts, and can uniformly clamp the connecting sleeve 143 circumferentially. Of course, the clamping member 151 can also be an integral structure with an opening to allow for bolt fastening. The positioning bushing 152 is coaxially sleeved on the drive shaft 11, and its inner diameter can form a transition fit with the drive shaft 11, and its outer diameter can form a transition fit with the inner wall of the glue application roller 141 to achieve axial fixation, while also being detachable.

[0052] In some embodiments, such as Figure 1 As shown, the glue applicator mechanism 1 also includes a bushing assembly 16, which is connected to the synchronous gear 12 and can cooperate with the glue applicator assembly 14 to apply glue to the label paper. Understandably, in operation, the bushing assembly 16 and the glue applicator roller 141 in the glue applicator assembly 14 are parallel and opposite each other, forming a clamping gap between them for the label paper to pass through. When the synchronous gear 12 rotates, power is simultaneously transmitted to both the glue applicator assembly 14 and the bushing assembly 16, ensuring that they maintain the same linear speed and operate synchronously. The bushing roller 161 provides a stable support reference for the label paper and forms a precise pressing relationship with the glue applicator sheet 142 during the glue application process, ensuring that the glue is evenly transferred to the surface of the label paper.

[0053] In some embodiments, the liner roller assembly 16 includes a liner roller shaft and a bushing rotatably mounted on the liner roller shaft. A liner roller 161 and a driven gear 162 are fixedly mounted on the bushing, and the driven gear 162 meshes with the synchronizing gear 12. It is understood that the liner roller shaft is supported on the side plate of the chassis by bearings, and one end of the shaft is provided with the driven gear 162, which directly meshes with the synchronizing gear 12 to form a stable transmission relationship.

[0054] This utility model also discloses a label paper coating machine, including a chassis, a drive mechanism disposed within the chassis, and the aforementioned coating structure. The drive component is drive-connected to the power transmission mechanism 2 of the coating structure. It is understood that the output end of the drive mechanism is drive-connected to the power transmission mechanism 2 of the coating structure to provide the power required for the coating operation. By integrating the aforementioned coating structure, when the position of the adhesive dots applied by the coating sheet 142 on the label paper needs to be adjusted, the operator does not need to disassemble the chassis or adjust the internal drive mechanism and power transmission mechanism 2. Instead, they only need to operate the adjustment component 13 in the coating head mechanism 1 outside the chassis to quickly and accurately complete the independent adjustment of the coating position. This significantly improves the ease of operation and maintenance and production flexibility of the entire machine, effectively solving problems such as difficulty in adjustment and long downtime caused by coating position deviation.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 coating structure, characterized in that, It includes a power transmission mechanism (2) located inside the chassis and a glue applicator mechanism (1) located outside the chassis. The glue applicator (1) includes a drive shaft (11), a synchronous gear (12) coaxially arranged with the drive shaft (11), an adjustment assembly (13), and a glue applicator (14). The drive shaft (11) passes through the inside and outside of the chassis and is rotatably connected to the side wall of the chassis. One end of the drive shaft (11) is located inside the chassis and is connected to the power transmission mechanism. The synchronous gear (12) is fixedly connected to the transmission shaft (11) and is used to transmit the power of the transmission shaft (11); The adjustment component (13) is driven between the glue application component (14) and the synchronous gear (12). The adjustment component (13) is circumferentially fixedly connected to the glue application component (14), and the adjustment component (13) can rotate circumferentially relative to the synchronous gear (12).

2. The adhesive-coated structure according to claim 1, characterized in that, The synchronizing gear (12) includes a body part (121) and a hub part (122). The hub part (122) is coaxially arranged with the body part (121). The hub part (122) is located on the side of the body part (121) away from the glue application assembly (14). The synchronizing gear (12) is connected to the transmission shaft (11) and the glue application assembly (14) through the hub part (122).

3. The adhesive coating structure according to claim 2, characterized in that, The hub (122) is cylindrical, and the interior of the hub (122) is provided with a first step surface (1221) and a second step surface (1222). The first step surface (1221) is fixedly connected to the drive shaft (11), and the second step surface (1222) is connected to the adjustment component (13).

4. The adhesive-coated structure according to claim 1, characterized in that, The adjustment assembly (13) includes an adjustment disc (131) and a fastener (132). At least one of the adjustment disc (131) or the synchronous gear (12) has an arc-shaped adjustment hole (133). The fastener (132) can pass through the arc-shaped adjustment hole (133) and lock the adjustment disc (131) and the synchronous gear (12) in place.

5. The adhesive coating structure according to claim 4, characterized in that, The glue application assembly (14) includes a glue application roller (141), a glue application sheet (142), and a connecting sleeve (143). The glue application sheet (142) is disposed on the glue application roller (141) and is used to apply glue to the workpiece to be glued. The connecting sleeve (143) is circumferentially fixedly connected to the adjusting disc (131).

6. The adhesive coating structure according to claim 5, characterized in that, The adjusting plate (131) is keyway connected to the connecting sleeve (143).

7. The adhesive coating structure according to claim 5, characterized in that, The glue applicator (1) further includes a limiting component (15), which includes a clamping member (151) and a positioning bushing (152). The clamping member (151) is disposed on the outer periphery of the connecting sleeve (143) and can clamp the connecting sleeve (143) circumferentially. The positioning bushing (152) is coaxially sleeved on the transmission shaft (11) and cooperates with the inner wall of the glue applicator (141) to limit the axial movement of the glue applicator (141).

8. The adhesive-coated structure according to any one of claims 1-7, characterized in that, The glue application head mechanism (1) further includes a liner roller (161) assembly (16), which is connected to the synchronous gear (12) and can cooperate with the glue application assembly (14) to apply glue to the workpiece.

9. The adhesive coating structure according to claim 8, characterized in that, The liner roller (161) assembly (16) includes a liner roller (161) shaft and a bushing rotatably mounted on the liner roller (161) shaft. The bushing is fixedly mounted with a liner roller (161) and a driven gear (162), which meshes with the synchronous gear (12).

10. A label paper gluing machine, characterized in that, It includes a chassis and a drive mechanism disposed within the chassis, as well as the adhesive coating structure according to any one of claims 1-9, wherein the drive mechanism is connected to the power transmission mechanism (2) of the adhesive coating structure.

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