Round scaling mechanism, dual-purpose gluing bottom roller and dual-purpose flat gluing machine

Abstract

The utility model belongs to the technical field of gluing equipment, and provides a circle scaling mechanism, a dual-purpose gluing bottom roller and a dual-purpose flat gluing machine, the mechanism comprises a scaling assembly and a power assembly, the scaling assembly comprises a shaft sleeve and a plurality of splicing pieces arranged at intervals in the peripheral direction of the shaft sleeve, the peripheral surface of each splicing piece is a cambered surface, and the power assembly is connected with the shaft sleeve. A plurality of limiting grooves extending in the radial direction are formed in the end of the shaft sleeve, limiting blocks matched with the limiting grooves are arranged on the splicing pieces, the outer surface of the shaft sleeve is slidably sleeved with a first sliding sleeve and a second sliding sleeve, the first sliding sleeve and the second sliding sleeve are arranged at the two ends of the splicing pieces respectively, and the first sliding sleeve is connected with the splicing pieces through first hinge blocks. The two ends of the first hinge block are hinged to the first sliding sleeve and the splicing pieces respectively, the second sliding sleeve is connected with the splicing pieces through the second hinge block, the two ends of the second hinge block are hinged to the second sliding sleeve and the splicing pieces respectively, and the power assembly drives to change the outer diameter defined by the splicing pieces. The gluing machine comprises the bottom roller.

Description

Technical Field

[0001] This utility model relates to the field of adhesive coating equipment technology, and in particular to a circular scaling mechanism, a dual-purpose adhesive coating bottom roller, and a dual-purpose flat adhesive coating machine. Background Technology

[0002] Flatbed glue applicators, also known as coating machines, glue scrapers, or automatic glue sprayers, are mechanical devices primarily used to apply liquid glue to the surface of strips or sheets. However, existing flatbed glue applicators for sheet processing have high requirements for sheet thickness, making them incompatible with both thick and thin sheet glue application. Even those that can barely handle both thick and thin sheets may leave glue residue on the applicator roller when processing thin sheets, resulting in suboptimal coating. In the sheet processing industry, sheets thinner than 3 mm are referred to as thin sheets, while sheets 3 mm and thicker are considered thick sheets. When applying adhesive to thick plates, the two ends of the adhesive-coating roller should be flush with or extend beyond the two edges of the thick plate. In other words, the length of the adhesive-coating roller should be greater than or equal to the width of the thick plate to better support it, allowing the adhesive-coating roller to evenly apply adhesive to the surface of the thick plate. However, when processing thin plates, to avoid the adhesive-coating roller and adhesive-coating bottom roller applying pressure to the thin plate, which could cause warping or wavy deformation, and to prevent adhesive from adhering to the adhesive-coating bottom roller, the sides of the thin plate should be suspended above the adhesive-coating bottom roller. In other words, the length of the adhesive-coating bottom roller should be less than the width of the thin plate. Therefore, existing flat-lay adhesive-coating machines are not suitable for processing thick and thin plates of the same width, requiring users to equip themselves with separate equipment for processing thick and thin plates, resulting in high investment costs.

[0003] The technical problem to be solved by this utility model is: how to solve the problem that the existing board flat gluing machine cannot be used for gluing operations on both thick and thin boards at the same time, and has poor versatility. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a circular scaling mechanism, a dual-purpose glue-applying bottom roller and a dual-purpose flat-applying glue machine, which can change the diameter of both ends of the glue-applying bottom roller according to the type of board material, so as to realize the glue-applying operation on thick and thin boards on the same equipment.

[0005] The technical solution adopted by this utility model is as follows: a circular scaling mechanism, including a scaling component and a power component. The scaling component includes a bushing and a plurality of splicing parts spaced apart along the outer circumference of the bushing. The outer circumferential surface of each splicing part is an arc surface. The end of the bushing is provided with a plurality of radially extending limiting grooves. Each splicing part is provided with a limiting block that cooperates with the limiting groove. A first sliding sleeve and a second sliding sleeve are slidably sleeved on the outer surface of the bushing. The first sliding sleeve and the second sliding sleeve are respectively provided at both ends of each splicing part. The first sliding sleeve is connected to each splicing part through a first hinge block. The two ends of the first hinge block are respectively hinged to the first sliding sleeve and the splicing part. The second sliding sleeve is connected to each splicing part through a second hinge block. The two ends of the second hinge block are respectively hinged to the second sliding sleeve and the splicing part. The power component drives the first sliding sleeve and the second sliding sleeve to move closer or further away from each other to change the outer diameter of the column formed by the splicing parts.

[0006] The circular scaling mechanism of this application can adjust the outer diameter of the column formed by each splicing component according to the needs. The limiting groove on the bushing restricts the splicing component to move only along the radial direction of the bushing. The power component drives the first sliding sleeve and the second sliding sleeve to move closer or further away, which drives the first hinge block and the second hinge block to push each splicing component to slide along the limiting groove, thereby realizing the enlargement or reduction of the outer diameter of the column formed by each splicing component.

[0007] In some embodiments, the bushing includes a cylindrical body and flanges disposed at one or both ends of the cylindrical body, a limiting groove is formed on the flange, and a first sliding sleeve and a second sliding sleeve are sleeved on the outer surface of the cylindrical body.

[0008] By adopting the above technical solution, by setting a flange on the cylinder, it is easy to open a limiting groove and reduce the overall size of the bushing.

[0009] In some embodiments, the splicing component includes a detachably connected mounting base and an arc-shaped piece, a limiting block is disposed on the mounting base, the mounting base is hinged to a first hinge block and a second hinge block, the mounting base is provided with a positioning protrusion, and the arc-shaped piece is provided with a positioning groove corresponding to the positioning protrusion.

[0010] By adopting the above technical solution and setting the splicing parts as a split structure, the processing difficulty can be reduced and the processing accuracy can be improved. By cooperating with the positioning groove and the positioning protrusion, the matching accuracy between the mounting base and the arc-shaped piece can be improved and the assembly difficulty can be reduced.

[0011] In some embodiments, the power assembly includes a double-ended screw, a first nut, and a second nut. The first nut and the second nut are respectively screwed to both ends of the double-ended screw. A bushing is sleeved on the outer surface of the first nut and the second nut. A first sliding sleeve is connected to the first nut, and a second sliding sleeve is connected to the second nut.

[0012] By adopting the above technical solution, the first and second sliding sleeves can move synchronously towards or away from each other by cooperating with the double-headed screw and the first and second nuts, thereby increasing or decreasing the outer diameter of the column formed by the splicing parts.

[0013] In some embodiments, the power assembly further includes a rotary power member that drives the double-ended screw, an input gear is connected to the double-ended screw, and a transmission member that meshes with the input gear is connected to the output end of the rotary power member.

[0014] Using the above technical solution, the input gear is driven to rotate by a rotating power component, which in turn drives the double-headed screw to rotate, thereby enlarging or reducing the outer diameter of the column formed by the splicing parts.

[0015] In some embodiments, the power assembly also includes a detection element that is signal-connected to the rotating power element. The detection element is located on one side of the splice and is used to detect the outer diameter of the column formed by the splice elements.

[0016] Using the above technical solution, the detection component can detect the outer diameter of the column formed by the splicing components, thereby cooperating with the controller to control the operation or shutdown of the rotating power component.

[0017] In some embodiments, the power assembly further includes a clutch power element, the output end of which is connected to the rotary power element to drive the rotary power element to move closer to or away from the input gear, so that the transmission element engages or disengages from the input gear.

[0018] Using the above technical solution, the clutch power component drives the rotary power component to approach or move away from the input gear. When it is necessary to adjust the outer diameter of the column formed by the splicing parts, the clutch power component drives the rotary power component to approach the input gear, so that the transmission component engages with the input gear, thereby adjusting the outer diameter of the column. When no adjustment is needed, the clutch power component drives the rotary power component to move away from the input gear, so that the transmission component separates from the input gear, avoiding interference between the rotary power component and the glue application roller during the glue application operation.

[0019] A dual-purpose adhesive coating roller includes a roller body and a circular scaling mechanism disposed at both ends of the roller body. The scaling components are sleeved at both ends of the roller body and coaxially disposed with the roller body. A power component drives the first sliding sleeve and the second sliding sleeve to move closer or further away from each other, so that the outer diameter of the column formed by the splicing parts is less than or equal to the outer diameter of the roller body.

[0020] Using the above technical solution, when processing thick plates, the power component drives the outer diameter of the column formed by the splicing parts to be equal to the outer diameter of the roller, so that the scaling component and the roller jointly support the thick plate to ensure the quality of glue application; when processing thin plates, the power component drives the outer diameter of the column formed by the splicing parts to be reduced, so that its outer diameter is smaller than the outer diameter of the roller, so that the two sides of the thin plate are suspended during glue application, to prevent glue from adhering to the surface of the splicing parts and the roller and affecting the quality of glue application.

[0021] A dual-purpose flat-applying adhesive machine includes an adhesive applicator roller and a dual-purpose adhesive applicator bottom roller as described above, wherein the adhesive applicator roller and the adhesive applicator bottom roller are arranged opposite to each other.

[0022] By adopting the above technical solution, the flat gluing machine with the above dual-purpose gluing bottom roller can process both thick and thin plates, has good versatility, and can save users investment in equipment costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a dual-purpose adhesive coating roller according to one embodiment of the present invention;

[0024] Figure 2 for Figure 1 The diagram shows the structural schematic of the circular scaling mechanism in the dual-purpose glue-applying bottom roller.

[0025] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the circular scaling mechanism along the axial direction of the bushing.

[0026] Figure 4 for Figure 2 The diagram shows a partial cross-sectional view of the scaling component and the power component in the circular scaling mechanism, where the rotary power component and the clutch power component are not shown.

[0027] Figure 5 for Figure 4 The diagram shown is an exploded view of the scaling component and the power component in the circular scaling mechanism, where the rotary power component and the clutch power component are not shown.

[0028] Figure 6 for Figure 5 The diagram shows an exploded view of the structure of the bushing, the first sliding sleeve, and the second sliding sleeve.

[0029] Figure 7 for Figure 4 The diagram shows the structure of the splicing component, the first hinge block, and the second hinge block.

[0030] In the diagram: 100, circular scaling mechanism; 10, scaling component; 11, bushing; 110, limiting groove; 111, cylinder; 112, flange; 113, slide groove; 12, splicing piece; 121, limiting block; 122, mounting base; 1221, positioning protrusion; 123, arc-shaped piece; 1231, positioning groove; 13, first sliding sleeve; 14, second sliding sleeve; 15, first hinge block; 16, second hinge block; 17, washer; 18, retaining ring; 20, power component; 21, double-ended screw; 22, first nut; 221, first connecting block; 23, second nut; 231, second connecting block; 24, rotational power component; 25, input gear; 26, transmission component; 27, detection component; 28, clutch power component;

[0031] 200. Dual-purpose adhesive coating bottom roller; 10a. Roller body; 11a. Shaft head. Detailed Implementation

[0032] 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.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. When the number of elements is referred to as "multiple," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] First embodiment:

[0036] Please see Figures 2 to 7A preferred embodiment of the present invention provides a circular scaling mechanism 100, comprising a scaling component 10 and a power component 20. The scaling component 10 includes a bushing 11 and a plurality of splicing parts 12 spaced apart along the outer circumference of the bushing 11. The outer circumferential surface of each splicing part 12 is arc-shaped. The end of the bushing 11 is provided with a plurality of radially extending limiting grooves 110. Each splicing part 12 is provided with a limiting block 121 that cooperates with the limiting groove 110. A first sliding sleeve 13 and a second sliding sleeve 14 are slidably sleeved on the outer surface of the bushing 11. The first sliding sleeve 13 and the second sliding sleeve 14 are slidably sleeved on the outer surface of the bushing 11. The second sliding sleeve 14 is respectively disposed at both ends of each splicing component 12. The first sliding sleeve 13 is connected to each splicing component 12 through the first hinge block 15. The two ends of the first hinge block 15 are respectively hinged to the first sliding sleeve 13 and the splicing component 12. The second sliding sleeve 14 is connected to each splicing component 12 through the second hinge block 16. The two ends of the second hinge block 16 are respectively hinged to the second sliding sleeve 14 and the splicing component 12. The power component 20 drives the first sliding sleeve 13 and the second sliding sleeve 14 to move closer or further away from each other, so as to change the outer diameter of the column formed by each splicing component 12.

[0037] The circular scaling mechanism 100 of this application can adjust the outer diameter of the column formed by each splicing component 12 as needed. The limiting groove 110 on the bushing 11 restricts each splicing component 12 to move only radially along the bushing 11. The power component 20 drives the first sliding sleeve 13 and the second sliding sleeve 14 to move closer or further away, thereby driving the first hinge block 15 and the second hinge block 16 to push each splicing component 12 to slide along the limiting groove 110, thereby realizing the enlargement or reduction of the outer diameter of the column formed by each splicing component 12.

[0038] like Figures 2 to 4 As shown, the bushing 11 includes a cylindrical body 111 and flanges 112 disposed at one or both ends of the cylindrical body 111. A limiting groove 110 is formed on the flange 112, and a first sliding sleeve 13 and a second sliding sleeve 14 are fitted onto the outer surface of the cylindrical body 111. By providing flanges 112 on the cylindrical body 111, it is easier to form the limiting groove 110 and reduce the overall size of the bushing 11.

[0039] Optionally, when flanges 112 are located at both ends of cylinder 111, one or both flanges 112 may be detachably connected to cylinder 111 to facilitate the installation of first sliding sleeve 13 and second sliding sleeve 14. Preferably, flanges 112 are connected to cylinder 111 by bolts.

[0040] Furthermore, when both ends of the cylinder 111 are provided with flanges 112, the limiting groove 110 can be provided on one of the flanges 112 or on both flanges 112 at the same time.

[0041] Furthermore, in order to restrict the splice 12 to move only radially along the cylinder 111, when the cylinder 111 has a flange 112 at only one end or only one end of the flange 112 is provided with a limiting groove 110, the limiting groove 110 should be set as a "T" groove or a dovetail groove, so that the splice 12 can only move radially along the cylinder 111.

[0042] like Figure 7 As shown, in some embodiments, the splicing component 12 includes a detachably connected mounting base 122 and an arc-shaped piece 123. A limiting block 121 is disposed on the mounting base 122. The mounting base 122 is hinged to a first hinge block 15 and a second hinge block 16. The mounting base 122 is provided with a positioning protrusion 1221, and the arc-shaped piece 123 is provided with a positioning groove 1231 corresponding to the positioning protrusion 1221. Setting the splicing component 12 as a split structure can reduce the processing difficulty and improve the processing accuracy. By cooperating with the positioning groove 1231 and the positioning protrusion 1221, the cooperation accuracy between the mounting base 122 and the arc-shaped piece 123 can be improved, and the assembly difficulty can be reduced.

[0043] like Figures 2 to 4 As shown, in one embodiment, the power assembly 20 includes a double-ended screw 21, a first nut 22, and a second nut 23. The first nut 22 and the second nut 23 are respectively screwed to both ends of the double-ended screw 21. A bushing 11 is sleeved on the outer surface of the first nut 22 and the second nut 23. A first sliding sleeve 13 is connected to the first nut 22, and a second sliding sleeve 14 is connected to the second nut 23. By cooperating with the double-ended screw 21, the first nut 22, and the second nut 23, the first sliding sleeve 13 and the second sliding sleeve 14 can move synchronously towards or away from each other, thereby increasing or decreasing the outer diameter of the column formed by the splicing parts 12.

[0044] Optionally, the first nut 22 is connected to the first sliding sleeve 13 via the first connecting block 221, and the second nut 23 is connected to the second sliding sleeve 14 via the second connecting block 231. A through groove 113 is provided on the cylinder 111, and the first connecting block 221 and the second connecting block 231 are disposed in the groove 113.

[0045] Furthermore, for ease of assembly, the first connecting block 221 is connected to the first nut 22 by bolts, and the second connecting block 231 is connected to the second nut 23 by bolts.

[0046] Optionally, in order to limit the stroke of the first sliding sleeve 13 and the second sliding sleeve 14, a washer 17 is provided on the bushing 11. The washer 17 is respectively provided at both ends of the cylinder 111, and the end face of the washer 17 abuts against the end face of the flange 112.

[0047] like Figure 2As shown, the power assembly 20 also includes a rotary power component 24 that drives the double-ended screw 21. An input gear 25 is connected to the double-ended screw 21, and a transmission component 26 that meshes with the input gear 25 is connected to the output end of the rotary power component 24. The rotary power component 24 drives the input gear 25 to rotate, thereby driving the double-ended screw 21 to rotate, which in turn drives the outer diameter of the column formed by the splicing parts 12 to increase or decrease.

[0048] For ease of assembly, the input gear 25 and the double-ended screw 21 are connected by bolts.

[0049] Optionally, a retaining ring 18 is provided at one end of the bushing 11 near the input gear 25. The retaining ring 18 is connected to the bushing 11 by fasteners. The inner wall of the retaining ring 18 is provided with a receiving groove. The end of the double-ended screw 21 near the retaining ring 18 is provided with a flange, which is housed in the receiving groove.

[0050] like Figure 2 As shown, in one embodiment, the rotating power component 24 is a motor, and the transmission component 26 is a gear.

[0051] In other embodiments, the rotating power component 24 may be one of a hydraulic cylinder, a pneumatic cylinder, or an electric actuator, and the transmission component 26 may be a rack and pinion.

[0052] In one embodiment, the power assembly 20 further includes a detection element 27 that is signal-connected to the rotating power component 24. The detection element 27 is disposed on one side of the splicing component 12 and is used to detect the outer diameter of the column formed by the splicing components 12. The detection element 27 can detect the outer diameter of the column formed by the splicing components 12, thereby cooperating with the controller to control the operation or shutdown of the rotating power component 24.

[0053] Optionally, the detection element 27 can be one of a photoelectric sensor, a contact micro-motion sensor, or the like.

[0054] like Figure 2 As shown, the power assembly 20 also includes a clutch power component 28. The output end of the clutch power component 28 is connected to the rotary power component 24, which drives the rotary power component 24 to move closer to or away from the input gear 25, thereby engaging or disengaging the transmission component 26 from the input gear 25. When the outer diameter of the column formed by the splicing parts 12 needs adjustment, the clutch power component 28 drives the rotary power component 24 closer to the input gear 25, engaging the transmission component 26 with the input gear 25 to adjust the outer diameter of the column. When no adjustment is needed, the clutch power component 28 drives the rotary power component 24 away from the input gear 25, disengaging the transmission component 26 from the input gear 25, thus preventing the rotary power component 24 from interfering with the glue application roller during the glue application process. Optionally, the clutch power component 28 can be a cylinder, a hydraulic cylinder, or a motor.

[0055] Second embodiment:

[0056] like Figure 1 As shown, a dual-purpose adhesive applicator roller 200 includes the circular scaling mechanism 100 described in the first embodiment. The dual-purpose adhesive applicator roller 200 includes a roller body 10a and the aforementioned circular scaling mechanism 100. The circular scaling mechanism 100 is disposed at both ends of the roller body 10a. Scaling components 10 are sleeved on both ends of the roller body 10a and coaxially arranged with the roller body 10a. During adhesive application, the scaling components 10 rotate with the roller body 10a. Shaft heads 11a are provided at both ends of the roller body 10a, and the double-ended screw 21 has shaft holes for the shaft heads 11a to pass through. The power component 20 drives the first sliding sleeve 13 and the second sliding sleeve 14 to move closer or further apart, so that the outer diameter of the column formed by the splicing parts 12 is less than or equal to the outer diameter of the roller body 10a. When processing thick plates, the power component 20 drives the outer diameter of the column formed by the splicing parts 12 to be equal to the outer diameter of the roller 10a, so that the scaling component 10 and the roller 10a jointly support the thick plate to ensure the quality of glue application. When processing thin plates, the power component 20 drives the outer diameter of the column formed by the splicing parts 12 to be reduced, so that its outer diameter is smaller than the outer diameter of the roller 10a, so that the two sides of the thin plate are suspended during glue application to prevent glue from adhering to the surface of the splicing parts 12 and the roller 10a and affecting the quality of glue application.

[0057] When applying adhesive using the dual-purpose adhesive roller 200, when processing thick plates, the clutch power component 28 drives the rotary power component 24 to approach the input gear 25. After the input gear 25 meshes with the transmission component 26, the rotary power component 24 drives the double-headed screw 21 to rotate, thereby driving the first sliding sleeve 13 and the second sliding sleeve 14 to move away from each other, and then pushing the splicing piece 12 outward. When the detection component 27 detects that the diameter of the column formed by each splicing piece 12 is equal to that of the roller body 10a, the rotary power component 24 stops rotating. Then, the clutch power component 28 drives the rotary power component 24 away from the input gear 25, causing the input gear 25 to separate from the transmission component 26, and then the adhesive application operation is performed. When processing thin plates, the clutch power component 28 drives the rotary power component 24 to approach the input gear 25. After the input gear 25 meshes with the transmission component 26, the rotary power component 24 drives the double-headed screw 21 to rotate in the opposite direction, thereby driving the first sliding sleeve 13 and the second sliding sleeve 14 to approach each other, and then pushing the splicing piece 12 inward. When the detection component 27 detects that the diameter of the column formed by each splicing piece 12 reaches the required diameter (less than the diameter of the roller 10a), the rotary power component 24 stops rotating. Then, the clutch power component 28 drives the rotary power component 24 away from the input gear 25, so that the input gear 25 is separated from the transmission component 26, and then the glue application operation is performed.

[0058] Third embodiment:

[0059] This utility model also provides a dual-purpose flat-laying glue applicator that includes one of the aforementioned dual-purpose glue applicator rollers 200. The glue applicator includes a glue applicator roller and the dual-purpose glue applicator roller 200, which are arranged opposite to each other. The flat-laying glue applicator with the aforementioned dual-purpose glue applicator roller 200 can change the diameter of both ends of the glue applicator roller according to the type of sheet material being processed (thick or thin), so that the diameter of both ends of the glue applicator roller matches the type of sheet material being processed. That is, it can process both thick and thin sheets, has good versatility, and can save users on equipment costs.

[0060] Finally, it should be noted that the above description is merely 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 circular scaling mechanism, characterized in that: The assembly includes a scaling component (10) and a power component (20). The scaling component (10) includes a bushing (11) and a plurality of splicing parts (12) spaced apart along the outer circumference of the bushing (11). The outer circumferential surface of each splicing part (12) is arc-shaped. The end of the bushing (11) is provided with a plurality of radially extending limiting grooves (110). Each splicing part (12) is provided with a limiting block (121) that cooperates with the limiting groove (110). A first sliding sleeve (13) and a second sliding sleeve (14) are slidably sleeved on the outer surface of the bushing (11). The first sliding sleeve (13) and the second sliding sleeve (14) are respectively provided on each splicing part. At both ends of the component (12), the first sliding sleeve (13) is connected to each splicing component (12) through the first hinge block (15), and the two ends of the first hinge block (15) are respectively hinged to the first sliding sleeve (13) and the splicing component (12). The second sliding sleeve (14) is connected to each splicing component (12) through the second hinge block (16), and the two ends of the second hinge block (16) are respectively hinged to the second sliding sleeve (14) and the splicing component (12). The power component (20) drives the first sliding sleeve (13) and the second sliding sleeve (14) to move closer or further away from each other, so as to change the outer diameter of the column formed by each splicing component (12).

2. The circular scaling mechanism according to claim 1, characterized in that, The bushing (11) includes a cylindrical body (111) and flanges (112) disposed at one or both ends of the cylindrical body (111). The limiting groove (110) is opened on the flange (112), and the first sliding sleeve (13) and the second sliding sleeve (14) are sleeved on the outer surface of the cylindrical body (111).

3. The circular scaling mechanism according to claim 2, characterized in that, The splicing component (12) includes a detachably connected mounting base (122) and an arc-shaped piece (123). The limiting block (121) is disposed on the mounting base (122). The mounting base (122) is hinged to the first hinge block (15) and the second hinge block (16). The mounting base (122) is provided with a positioning protrusion (1221). The arc-shaped piece (123) is provided with a positioning groove (1231) corresponding to the positioning protrusion (1221).

4. The circular scaling mechanism according to claim 1, characterized in that, The power assembly (20) includes a double-ended screw (21), a first nut (22) and a second nut (23). The first nut (22) and the second nut (23) are respectively screwed to both ends of the double-ended screw (21). The bushing (11) is sleeved on the outer surface of the first nut (22) and the second nut (23). The first sliding sleeve (13) is connected to the first nut (22), and the second sliding sleeve (14) is connected to the second nut (23).

5. The circular scaling mechanism according to claim 4, characterized in that, The power assembly (20) also includes a rotary power component (24) that drives the double-ended screw (21), an input gear (25) is connected to the double-ended screw (21), and a transmission component (26) that meshes with the input gear (25) is connected to the output end of the rotary power component (24).

6. The circular scaling mechanism according to claim 5, characterized in that, The power assembly (20) also includes a detection element (27) that is signal-connected to the rotating power element (24). The detection element (27) is disposed on one side of the splicing element (12) and is used to detect the outer diameter of the column formed by the splicing elements (12).

7. The circular scaling mechanism according to claim 5, characterized in that, The power assembly (20) also includes a clutch power component (28), the output end of which is connected to the rotary power component (24) to drive the rotary power component (24) to move closer to or away from the input gear (25), so that the transmission component (26) engages or disengages from the input gear (25).

8. A dual-purpose adhesive coating roller, characterized in that, The device includes a roller body (10a) and a circular scaling mechanism (100) as described in any one of claims 1 to 7 disposed at both ends of the roller body (10a). The scaling component (10) is sleeved on both ends of the roller body (10a) and coaxially disposed with the roller body (10a). The power component (20) drives the first sliding sleeve (13) and the second sliding sleeve (14) to move closer or further away from each other so that the outer diameter of the column formed by the splicing parts (12) is less than or equal to the outer diameter of the roller body (10a).

9. A dual-purpose flat-lay adhesive applicator, characterized in that, It includes a coating roller and a dual-purpose coating roller (200) as described in claim 8, wherein the coating roller and the dual-purpose coating roller (200) are arranged opposite to each other.

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