Vacuum suction roller

Abstract

The utility model discloses a kind of vacuum adsorption rollers, including roller body and hollow center shaft;Roller body includes tubular double-layer metal screen structure, first cover plate and second cover plate, double-layer metal screen structure ring is set in the outer periphery of center shaft and multiple uniform distribution adsorption holes are formed thereon, adsorption hole is communicated with the inside of double-layer metal screen structure, first cover plate is arranged at one end of double-layer metal screen structure, and second cover plate is arranged at the other end of double-layer metal screen structure;The outer periphery of center shaft is sleeved with fixed block, and fixed block is located in the inside of first cover plate and one end of double-layer metal screen structure, and fixed block and double-layer metal screen structure are rotatably connected, and second cover plate is provided with transmission shaft, and one end of transmission shaft is located in the inside of double-layer metal screen structure and rotatably connected with one end of center shaft.The utility model is convenient for the assembly of roller body, and the strength of roller body can be improved, so that the deformation of roller body can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, specifically to a vacuum adsorption roller. Background Technology

[0002] Currently, in the coating process of lithium battery substrates such as foils, vacuum adsorption rollers are generally used to pull the substrate to prevent wrinkling.

[0003] Existing vacuum adsorption rollers generally consist of a roller shaft and a roller body rotatably sleeved around the outer circumference of the roller shaft. The roller body typically uses a metal sleeve with multiple evenly distributed adsorption holes or a layer of sintered metal mesh. Because the metal sleeve is relatively heavy, it increases the weight of the roller body, making assembly inconvenient. While using a layer of sintered metal mesh can reduce the weight of the roller body, the sintered metal mesh has low strength, thus reducing the strength of the roller body and making it prone to deformation.

[0004] Therefore, there is an urgent need for an improved vacuum adsorption roller to solve the above-mentioned technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a vacuum adsorption roller, which can reduce the weight of the roller body, facilitate the assembly of the roller body, and improve the strength of the roller body, thereby reducing the occurrence of roller body deformation.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A vacuum adsorption roller includes a roller body and a hollow central shaft. The roller body includes a tubular double-layer metal mesh structure, a first cover plate, and a second cover plate. The double-layer metal mesh structure is arranged around the outer periphery of the central shaft and has a plurality of uniformly distributed adsorption holes thereon. The adsorption holes communicate with the interior of the double-layer metal mesh structure. The first cover plate is disposed at one end of the double-layer metal mesh structure, and the second cover plate is disposed at the other end of the double-layer metal mesh structure. A fixing block is sleeved on the outer periphery of the central shaft, and the fixing block is located between the first cover plate and the double-layer metal mesh structure. Within one end of the structure, the fixed block and the double-layer metal screen structure are rotatably connected. The double-layer metal screen structure and the first cover plate are rotatable relative to the fixed block. The second cover plate is provided with a drive shaft. One end of the drive shaft is located inside the double-layer metal screen structure and is rotatably connected to one end of the central shaft. The other end of the drive shaft is located outside the double-layer metal screen structure and is used to connect with the drive mechanism. The other end of the central shaft is used to connect with the vacuum equipment. The outer circumference of the central shaft has an air vent, which communicates with the interior of the double-layer metal screen structure.

[0007] As a preferred technical solution, the double-layer metal screen structure includes a tubular inner metal screen and a tubular outer metal screen. The inner metal screen is arranged around the outer periphery of the central axis and has multiple evenly distributed inner mesh holes that communicate with the interior of the inner metal screen. The outer metal screen is arranged around the outer side of the inner metal screen and has multiple evenly distributed outer mesh holes that serve as adsorption holes. The multiple outer mesh holes and multiple inner mesh holes are staggered and communicate with the interior of the inner metal screen through the multiple inner mesh holes. Multiple inner reinforcing strips are spaced circumferentially on the outer side of the inner metal screen, and multiple outer reinforcing strips are spaced circumferentially on the inner side of the outer metal screen. A series of ribs, including multiple outer and inner ribs, are connected in a one-to-one correspondence. One end of each of the inner and outer metal meshes, the multiple inner ribs, and the multiple outer ribs is connected to a first mounting component. The other end of each of the inner and outer metal meshes, the multiple inner ribs, and the multiple outer ribs is connected to a second mounting component. A first cover plate is located at the end of the first mounting component away from the inner and outer metal meshes, and a second cover plate is located at the end of the second mounting component away from the inner and outer metal meshes. A fixing block is located inside the first cover plate and the first mounting component, and the fixing block and the first mounting component are rotatably connected. One end of the drive shaft is located inside the inner metal mesh, and the vent hole communicates with the interior of the inner metal mesh.

[0008] As a preferred technical solution, the cross-sectional shape of both the inner and outer rib strips is wedge-shaped, and the outer rib strip and the corresponding inner rib strip form a rhomboid structure; the space between two adjacent rhomboid structures is filled with breathable cotton.

[0009] As a preferred technical solution, two baffles are arranged circumferentially on the outer peripheral surface of the central shaft. The baffles are located inside the inner metal screen. One end of the baffle is close to the fixed block, and the other end of the baffle is close to the second cover plate. The side of the baffle away from the central shaft is in contact with the inner side of the inner metal screen. An adsorption area is formed between the side of the two baffles that are close to each other and the inner side of the inner metal screen. The air passage is connected to the adsorption area.

[0010] As a preferred technical solution, a sealing strip is provided on the side of the baffle away from the central axis, the sealing strip is in contact with the inner side of the inner metal screen, and a plug is provided inside the central axis, the plug being close to one end of the central axis.

[0011] As a preferred technical solution, the system further includes a width adjustment component, which comprises an adjustment knob, a first spiral rod, a second spiral rod, and an optical axis. The first spiral rod, the optical axis, and the second spiral rod are all located within the adsorption area. The optical axis is located between the first and second spiral rods, and its two ends are respectively connected to the first ends of the first and second spiral rods. The first and second spiral rods are rotatably mounted on the outer circumferential surface of the central shaft. The second end of the first spiral rod passes through the fixing hole of the fixing block and is located outside the inner metal screen. The adjustment knob is connected to the second end of the first spiral rod. The threads of the first and second spiral rods have opposite directions. The first and second spiral rods are threadedly fitted with two width adjustment plates, which are symmetrically arranged about the center of the adsorption area. The two ends of the width adjustment plates are respectively fitted to the side of the two baffles that are close to each other. The first arc surface at the bottom of the width adjustment plate is fitted to the outer circumferential surface of the central shaft, and the second arc surface at the top of the width adjustment plate is fitted to the inner side of the inner metal screen. The air passage is located between the two width adjustment plates.

[0012] As a preferred technical solution, the included angle between the two baffles is 70-90 degrees.

[0013] As a preferred technical solution, an air extraction hole is provided on the outer peripheral surface of the other end of the central shaft. The air extraction hole is connected to the interior of the central shaft and is used to connect to a vacuum pumping device. A sealing plate is provided inside the other end of the central shaft.

[0014] As a preferred technical solution, the first cover plate has an annular first protrusion at one end near the first mounting member, the first protrusion is fitted inside the first mounting member and the outer peripheral surface of the first protrusion is sealed to the inner peripheral surface of the first mounting member, and the second cover plate has a second protrusion at one end near the second mounting member, the second protrusion is fitted inside the second mounting member and the outer peripheral surface of the second protrusion is sealed to the inner peripheral surface of the second mounting member.

[0015] The beneficial effects of this utility model are: the roller body of this utility model adopts a double-layer metal screen structure. Compared with the existing method of using a metal sleeve, the double-layer metal screen structure is lighter in weight, which can reduce the weight of the roller body and facilitate the assembly of the roller body. At the same time, compared with the existing method of using a single-layer metal sintered mesh, the double-layer metal screen structure has high strength, which improves the strength of the roller body and reduces the occurrence of roller body deformation. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1This is a schematic diagram of the structure of a vacuum adsorption roller at a first angle according to an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the second angle of the vacuum adsorption roller shown; Figure 3 , Figure 4 yes Figure 1 A cross-sectional schematic diagram of the vacuum adsorption roller shown. Figure 5 yes Figure 1 The diagram shows the structure of the vacuum adsorption roller after removing the inner metal screen, outer metal screen, first mounting component, and second mounting component. Figure 6 yes Figure 1 The diagram shows the structure of the vacuum adsorption roller after removing the inner metal screen, outer metal screen, first mounting component, second mounting component, and second cover plate.

[0018] Figure label: 10. Roller body; 11. Inner metal screen; 111. Inner mesh; 112. Inner reinforcement strip; 12. Outer metal screen; 121. Outer mesh; 122. Outer reinforcement strip; 13. First cover plate; 131. First protrusion; 132. First mounting hole; 14. Second cover plate; 141. Second protrusion; 142. Third mounting hole; 15. First mounting component; 16. Second mounting component; 17. Breathable cotton; 20. Central shaft; 21. Fixing block; 211. Fixing block bearing; 22. Air extraction port; 23. Sealing plate; 24. Air passage port; 25. Plug; 26. Baffle; 261. Sealing strip; 27. Adsorption area; 30. Drive shaft; 31. Drive shaft bearing; 40. Width adjustment assembly; 41. Adjustment knob; 42. First screw rod; 421. Fixed block flange bearing; 422. First fixed seat; 4221. First flange bearing; 43. Second screw rod; 431. Second fixed seat; 4311. Second flange bearing; 44. Optical axis; 441. Universal joint; 45. Width adjustment plate; 451. Second arc surface. Detailed Implementation

[0019] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0020] Please refer to Figures 1 to 6 An embodiment of this utility model provides a vacuum adsorption roller, which includes a roller body 10 and a hollow central shaft 20.

[0021] The roller body 10 includes a tubular double-layer metal screen structure, an annular first cover plate 13, and a circular second cover plate 14. The double-layer metal screen structure is arranged around the outer periphery of the central shaft 20 and has multiple evenly distributed adsorption holes, which are connected to the interior of the double-layer metal screen structure. The first cover plate 13 is located at one end of the double-layer metal screen structure, and the second cover plate 14 is located at the other end of the double-layer metal screen structure. A fixing block 21 is sleeved around the outer periphery of the central shaft 20. The fixing block 21 is located inside the first cover plate 13 and one end of the double-layer metal screen structure. The fixing block 21 and the double-layer metal screen structure are rotatably connected, and the double-layer metal screen structure and the first cover plate 13 can rotate relative to the fixing block 21. The second cover plate 14 is equipped with a drive shaft 30. Specifically, a through hole is provided at the center of the second cover plate 14, through which the drive shaft 30 is inserted. The inner wall of the through hole and the outer circumferential surface of the drive shaft 30 are welded together. One end of the drive shaft 30 is located inside the double-layer metal mesh structure and is rotatably connected to one end of the central shaft 20. The other end of the drive shaft 30 is located outside the double-layer metal mesh structure and is used to connect to a drive mechanism (not shown in the figure). The drive mechanism can drive the drive shaft 30 to rotate, thereby driving the second cover plate 14, the double-layer metal mesh structure, and the first cover plate 13 to rotate. The other end of the central shaft 20 is used to connect to a vacuum pump. The outer circumferential surface of the central shaft 20 has vent holes 24, which communicate with the interior of the double-layer metal mesh structure. In this embodiment, there are four vent holes 24, which are spaced apart along the axial direction of the central shaft 20. It can be understood that the number of vent holes 24 can be set according to the actual situation.

[0022] In practical applications, a bearing seat is fitted around the outer periphery of the drive shaft 30, and the bearing seat is mounted on the drive side wall of the coating device. A mounting seat is fitted around the outer periphery of the central shaft 20, and the mounting seat is mounted on the fixed side wall of the coating device. When the substrate passes around the outside of the double-layer metal screen structure, a vacuum is drawn through the interior of the central shaft 20, the air passage 24, and the interior of the double-layer metal screen structure to evacuate the adsorption holes. This allows the substrate to be adsorbed onto the roller 10 through the adsorption holes, thus isolating the tension of the substrate and preventing slippage. The drive mechanism drives the drive shaft 30, the second cover plate 14, the first cover plate 13, and the double-layer metal screen structure to rotate, thereby moving the substrate adsorbed on the roller 10 to achieve traction of the substrate. The substrate may be, for example, foil.

[0023] The roller body 10 of this utility model adopts a double-layer metal screen structure. Compared with the existing method of using a metal sleeve, the double-layer metal screen structure is lighter, which can reduce the weight of the roller body 10 and facilitate the assembly of the roller body 10. At the same time, compared with the existing method of using a single-layer metal sintered mesh, the double-layer metal screen structure has high strength, which improves the strength of the roller body 10 and reduces the possibility of deformation of the roller body 10.

[0024] The double-layer metal screen structure includes a tubular inner metal screen 11 and a tubular outer metal screen 12. The inner metal screen 11 is arranged around the outer periphery of the central shaft 20, and has multiple evenly distributed inner mesh openings 111, which are connected to the interior of the inner metal screen 11. The outer metal screen 12 is arranged around the outer side of the inner metal screen 11, and has multiple evenly distributed outer mesh openings 121, which serve as adsorption openings. The multiple outer mesh openings 121 and the multiple inner mesh openings 111 are staggered, and the multiple outer mesh openings 121 are connected to the interior of the inner metal screen 11 through the multiple inner mesh openings 111. The number of inner mesh openings 111 and outer mesh openings 121 can be set according to actual conditions. The outer side of the inner metal mesh 11 is provided with a plurality of inner layer ribs 112 spaced apart circumferentially, and the inner side of the outer metal mesh 12 is provided with a plurality of outer layer ribs 122 spaced apart circumferentially. The plurality of outer layer ribs 122 and the plurality of inner layer ribs 112 are connected one-to-one, for example by welding. One end of the inner metal mesh 11, the outer metal mesh 12, the plurality of inner layer ribs 112 and the plurality of outer layer ribs 122 are all connected to the first mounting member 15, and the other end of the inner metal mesh 11, the outer metal mesh 12, the plurality of inner layer ribs 112 and the plurality of outer layer ribs 122 are all connected to the second mounting member 16, for example by welding. The first cover plate 13 is located at the end of the first mounting member 15 away from the inner metal mesh 11 and the outer metal mesh 12, and the second cover plate 14 is located at the end of the second mounting member 16 away from the inner metal mesh 11 and the outer metal mesh 12. The first mounting member 15 and the second mounting member 16 provide support for the inner metal screen 11, the outer metal screen 12, the multiple inner ribs 112, and the multiple outer ribs 122. The inner ribs 112 and the outer ribs 122 support the inner metal screen 11 and the outer metal screen 12, increasing their strength. The inner ribs 112 and the inner metal screen 11, and the outer ribs 122 and the outer metal screen 12 are connected by welding. It is understandable that the inner ribs 112 and the inner metal screen 11, and the outer ribs 122 and the outer metal screen 12, may not be connected. The fixing block 21 is located within the first cover plate 13 and the first mounting member 15, and the fixing block 21 and the first mounting member 15 are rotatably connected. One end of the drive shaft 30 is located inside the inner metal screen 11, and the air passage 24 is connected to the inside of the inner metal screen 11. In practical applications, the substrate passes around the outside of the outer metal screen 12, and the drive shaft 30 can be driven to rotate by the drive mechanism, thereby driving the second cover plate 14, the second mounting part 16, the inner metal screen 11, the outer metal screen 12, the first mounting part 15, and the first cover plate 13 to rotate. The adsorption holes can be evacuated through the inside of the central shaft 20, the air passage 24, the inside of the inner metal screen 11, and the inner mesh 111 by the vacuum equipment.

[0025] The inner metal mesh 11, inner rib 112, outer metal mesh 12 and outer rib 122 are all made of stainless steel. The first mounting part 15, the second mounting part 16, the first cover plate 13 and the first cover plate 13 are made of the same material as the inner metal mesh 11 and the outer metal mesh 12.

[0026] Both the inner rib 112 and the outer rib 122 have wedge-shaped cross-sections. This shape helps avoid weld seams and protrusions during welding, resulting in a more aesthetically pleasing appearance.

[0027] The outer layer rib 122 and the corresponding inner layer rib 112 form a rhombus structure, and the space between adjacent rhombus structures is filled with breathable cotton 17. The breathable cotton 17 can ensure radial air permeability of the roller body 10 and prevent axial air leakage of the roller body 10, thereby enabling the substrate to be firmly adsorbed onto the roller body 10.

[0028] Breathable cotton 17 is aramid cotton. Understandably, breathable cotton 17 can also be made of other materials.

[0029] In this embodiment, the first cover plate 13 is provided with a first mounting hole 132, and the end of the first mounting member 15 away from the inner metal screen 11 and the outer metal screen 12 is provided with a second mounting hole corresponding to the first mounting hole 132. A first fastener, such as a screw, is installed in the second mounting hole and the corresponding first mounting hole 132. The first cover plate 13 is provided with a third mounting hole 142, and the end of the second mounting member 16 away from the inner metal screen 11 and the outer metal screen 12 is provided with a fourth mounting hole corresponding to the third mounting hole 142. A second fastener, such as a screw, is installed in the fourth mounting hole and the corresponding third mounting hole 142. The number of the first mounting hole 132, the second mounting hole, the first fastener, the third mounting hole 142, the fourth mounting hole, and the second fastener can be set according to actual conditions.

[0030] The first cover plate 13 has an annular first protrusion 131 at one end near the first mounting member 15. The first protrusion 131 is arranged around the outer periphery of the fixing block 21. The first protrusion 131 is disposed inside the first mounting member 15, and its outer peripheral surface is sealed to the inner peripheral surface of the first mounting member 15 to achieve a sealing function. The sealing connection method is, for example, welding. The second cover plate 14 has a circular second protrusion 141 at one end near the second mounting member 16. The second protrusion 141 is disposed inside the second mounting member 16, and its outer peripheral surface is sealed to the inner peripheral surface of the second mounting member 16 to achieve a sealing function. The sealing connection method is, for example, welding. The second protrusion 141 has a hole through which the drive shaft 30 passes. The inner wall of the hole is welded to the outer peripheral surface of the drive shaft 30.

[0031] The fixing block 21 is rotatably connected to the first mounting member 15. Specifically, the first mounting member 15 is provided with a fixing block bearing 211, which is sleeved on the outer periphery of the fixing block 21. An annular sealing element is sleeved on the outer periphery of the fixing block 21, and the sealing element contacts the inner periphery of the first cover plate 13, thus providing a sealing function.

[0032] In this embodiment, an air extraction hole 22 is provided on the outer peripheral surface of the other end of the central shaft 20. The air extraction hole 22 is connected to the interior of the central shaft 20 and is used to connect to a vacuum pumping device through an air extraction pipe. A sealing plate 23 is provided inside the other end of the central shaft 20. The air extraction hole 22 is located between the sealing plate 23 and the fixing block 21. The sealing plate 23 is used to seal the other end of the central shaft 20. The vacuum pumping device can evacuate the adsorption holes through the air extraction pipe, the air extraction hole 22, the interior of the central shaft 20, the air passage hole 24, the interior of the inner metal screen 11, the inner mesh 111, and the space between two adjacent rhomboid structures. A plug 25 is provided inside the central shaft 20. The plug 25 is close to one end of the central shaft 20 and is used to seal one end of the central shaft 20, so that the vacuum pumping device can evacuate the adsorption holes through the air passage hole 24.

[0033] One end of the drive shaft 30 is rotatably connected to one end of the central shaft 20. Specifically, one end of the drive shaft 30 extends into one end of the central shaft 20, and a drive shaft bearing 31 is provided inside one end of the central shaft 20. The drive shaft bearing 31 is sleeved on the outer circumference of one end of the drive shaft 30.

[0034] In this embodiment, two baffles 26 are circumferentially spaced on the outer periphery of the central shaft 20. The baffles 26 are located within the inner metal screen 11. One end of each baffle 26 is close to the fixing block 21, and the other end is close to the second cover plate 14. The side of the baffle 26 away from the central shaft 20 contacts the inner side of the inner metal screen 11. An adsorption area 27 is formed between the side of the two baffles 26 that is close to each other and the inner side of the inner metal screen 11. The air passage 24 communicates with the adsorption area 27. In practical applications, a vacuum device can be used to evacuate the adsorption holes corresponding to the adsorption area 27 through the interior of the central shaft 20, the air passage 24, and the adsorption area 27. This allows the substrate to be adsorbed onto the roller 10 through the adsorption holes corresponding to the adsorption area 27, thus breaking the tension on the substrate. This structure allows the substrate to form a wrap angle on the roller 10, meeting the coating requirements.

[0035] A sealing strip 261 is provided on the side of the baffle 26 away from the central axis 20. The sealing strip 261 contacts the inner side of the inner metal screen 11. The sealing strip 261 serves two purposes: firstly, it provides a seal, ensuring that only the adsorption holes corresponding to the adsorption area 27 are evacuated when the adsorption holes are evacuated by the vacuum equipment; secondly, it prevents damage to the baffle 26 during the rotation of the inner metal screen 11. The sealing strip 261 is made of materials such as silicone or rubber.

[0036] In this embodiment, the cross-section of the baffle 26 is formed in an inverted trapezoidal shape, such as... Figure 4 As shown, the included angle A between the two baffles 26 is 70-90 degrees, preferably 80 degrees. This included angle A is the wrap angle generated by the substrate on the roller 10.

[0037] Furthermore, the vacuum adsorption roller of this invention also includes a width adjustment component 40, which is used to adjust the adsorption width to adapt to substrates of different widths, thus having a wide range of applications. Specifically, the width adjustment component 40 includes an adjustment knob 41, a first spiral rod 42, a second spiral rod 43, and an optical axis 44.

[0038] The first helical rod 42, the optical axis 44, and the second helical rod 43 are all located within the adsorption region 27 and above the central axis 20. The optical axis 44 is located between the first helical rod 42 and the second helical rod 43, and both ends of the optical axis 44 are connected to the first end of the first helical rod 42 and the first end of the second helical rod 43 respectively through two universal joints 441. The first helical rod 42 and the second helical rod 43 are rotatably mounted on the outer circumferential surface of the central axis 20. In this embodiment, a fan-shaped first fixing seat 422 corresponding to the first end of the first helical rod 42 is provided on the outer circumferential surface of the central axis 20. Both ends of the first fixing seat 422 are respectively engaged with the side of the two baffles 26 that are close to each other. The top end of the first fixing seat 422 is lower than the side of the baffles 26 that is away from the central axis 20. The first end of the first helical rod 42 passes through the through hole of the first fixing seat 422. A first flange bearing 4221 is provided in the through hole of the first fixing seat 422. The first flange bearing 4221 is sleeved on the first end of the first helical rod 42. The outer circumference provides rotational support for the first spiral rod 42. Two fan-shaped second fixing seats 431 are provided on the outer circumference of the central shaft 20, corresponding to the first and second ends of the second spiral rod 43 respectively. The first end of the second spiral rod 43 passes through a through hole in one of the second fixing seats 431, and the second end of the second spiral rod 43 passes through a through hole in the other second fixing seat 431. A second flange bearing 4311 is provided inside the through hole of the second fixing seat 431. The second flange bearings 4311 of the two second fixing seats 431 are respectively sleeved on the outer circumference of the first and second ends of the second spiral rod 43 to provide rotational support for the second spiral rod 43. The second end of the first spiral rod 42 passes through the fixing block hole of the fixing block 21 and is located outside the inner metal screen 11. The adjusting knob 41 is connected to the second end of the first spiral rod 42. The threads of the first spiral rod 42 and the second spiral rod 43 have opposite directions of rotation. The first spiral rod 42 and the second spiral rod 43 are threadedly fitted with two fan-shaped width adjustment plates 45. The two width adjustment plates 45 are symmetrically arranged about the center of the adsorption area 27. The two ends of the width adjustment plates 45 are respectively fitted with the side of the two baffles 26 that are close to each other. The first arc surface at the bottom of the width adjustment plate 45 is fitted with the outer peripheral surface of the central shaft 20. The second arc surface 451 at the top of the width adjustment plate 45 is fitted with the inner side of the inner metal screen 11. The air passage 24 is located between the two width adjustment plates 45.Manually rotating the adjustment knob 41 drives the first spiral rod 42 to rotate, which in turn drives the optical shaft 44 and the second spiral rod 43 to rotate. Since the threads of the first spiral rod 42 and the second spiral rod 43 rotate in opposite directions, the first spiral rod 42 and the second spiral rod 43 can drive the two width adjustment plates 45 to move towards each other or away from each other. In practical applications, when the substrate passes around the outside of the outer metal screen 12 and is located above the adsorption area 27, a vacuum device is used to evacuate the adsorption holes located between the two width adjustment plates 45 through the air extraction hole 22, the inside of the central shaft 20, the air passage hole 24, and the adsorption area 27. Thus, the substrate can be adsorbed onto the roller body 10 through the adsorption holes located between the two width adjustment plates 45. By driving the two width adjustment plates 45 to move towards each other or away from each other, the length of the adsorption area 27 can be reduced or increased, and the number of adsorption holes corresponding to the adsorption area 27 can be reduced or increased, thereby adjusting the adsorption width.

[0039] In this embodiment, a fixing block flange bearing 421 is provided in the fixing block hole. The fixing block flange bearing 421 is sleeved on the outer periphery of the first spiral rod 42 to provide rotational support for the first spiral rod 42, and the fixing block flange bearing 421 also serves as a seal.

[0040] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A vacuum adsorption roller, characterized in that, The device includes a roller body and a hollow central shaft. The roller body comprises a tubular double-layer metal screen structure, a first cover plate, and a second cover plate. The double-layer metal screen structure is arranged around the outer periphery of the central shaft and has multiple evenly distributed adsorption holes, which communicate with the interior of the double-layer metal screen structure. The first cover plate is disposed at one end of the double-layer metal screen structure, and the second cover plate is disposed at the other end of the double-layer metal screen structure. A fixing block is sleeved on the outer periphery of the central shaft. The fixing block is located inside the first cover plate and one end of the double-layer metal screen structure, and the fixing block and the double-layer metal screen structure are rotatably connected. The double-layer metal screen structure and the first cover plate can rotate relative to the fixing block. The second cover plate is provided with a drive shaft. One end of the drive shaft is located inside the double-layer metal screen structure and is rotatably connected to one end of the central shaft. The other end of the drive shaft is located outside the double-layer metal screen structure and is used to connect with a drive mechanism. The other end of the central shaft is used to connect with a vacuum pump. An air vent is present on the outer periphery of the central shaft, and the air vent communicates with the interior of the double-layer metal screen structure.

2. The vacuum adsorption roller according to claim 1, characterized in that, The double-layer metal screen structure includes a tubular inner metal screen and a tubular outer metal screen. The inner metal screen is arranged around the outer periphery of the central axis and has multiple evenly distributed inner mesh openings that communicate with the interior of the inner metal screen. The outer metal screen is arranged around the outer side of the inner metal screen and has multiple evenly distributed outer mesh openings that serve as adsorption openings. The multiple outer mesh openings and multiple inner mesh openings are staggered, and the multiple outer mesh openings communicate with the interior of the inner metal screen through the multiple inner mesh openings. Multiple inner reinforcement strips are spaced circumferentially on the outer side of the inner metal screen, and multiple outer reinforcement strips are spaced circumferentially on the inner side of the outer metal screen. One outer rib and multiple inner ribs are connected in a one-to-one correspondence. One end of each of the inner and outer metal mesh, the multiple inner ribs, and the multiple outer ribs is connected to a first mounting component. The other end of each of the inner and outer metal mesh, the multiple inner ribs, and the multiple outer ribs is connected to a second mounting component. A first cover plate is located at the end of the first mounting component away from the inner and outer metal meshes. A second cover plate is located at the end of the second mounting component away from the inner and outer metal meshes. A fixing block is located inside the first cover plate and the first mounting component, and the fixing block and the first mounting component are rotatably connected. One end of the drive shaft is located inside the inner metal mesh, and the vent hole communicates with the interior of the inner metal mesh.

3. The vacuum adsorption roller according to claim 2, characterized in that, The cross-sectional shape of both the inner and outer ribs is wedge-shaped, and the outer rib and the corresponding inner rib form a rhomboid structure; the space between two adjacent rhomboid structures is filled with breathable cotton.

4. The vacuum adsorption roller according to claim 2, characterized in that, Two baffles are arranged circumferentially on the outer peripheral surface of the central shaft. The baffles are located inside the inner metal screen. One end of the baffle is close to the fixed block, and the other end of the baffle is close to the second cover plate. The side of the baffle away from the central shaft is in contact with the inner side of the inner metal screen. An adsorption area is formed between the side of the two baffles that are close to each other and the inner side of the inner metal screen. The air passage is connected to the adsorption area.

5. The vacuum adsorption roller according to claim 4, characterized in that, A sealing strip is provided on the side of the baffle away from the central axis. The sealing strip is in contact with the inner side of the inner metal screen. A plug is provided inside the central axis, and the plug is close to one end of the central axis.

6. The vacuum adsorption roller according to claim 4, characterized in that, It also includes a width adjustment component, which includes an adjustment knob, a first spiral rod, a second spiral rod, and an optical axis. The first spiral rod, the optical axis, and the second spiral rod are all located within the adsorption area. The optical axis is located between the first and second spiral rods, and its two ends are respectively connected to the first ends of the first and second spiral rods. The first and second spiral rods are rotatably mounted on the outer circumferential surface of the central shaft. The second end of the first spiral rod passes through the fixing block hole of the fixing block and is located outside the inner metal screen. The adjustment knob is connected to the second end of the first spiral rod. The threads of the first and second spiral rods have opposite directions. The first and second spiral rods are threadedly fitted with two width adjustment plates, which are symmetrically arranged about the center of the adsorption area. The two ends of the width adjustment plates are respectively fitted to the side of the two baffles that are close to each other. The first arc surface at the bottom of the width adjustment plate is fitted to the outer circumferential surface of the central shaft, and the second arc surface at the top of the width adjustment plate is fitted to the inner side of the inner metal screen. The air passage is located between the two width adjustment plates.

7. The vacuum adsorption roller according to claim 4, characterized in that, The included angle between the two baffles is 70-90 degrees.

8. The vacuum adsorption roller according to claim 1, characterized in that, The outer circumferential surface of the other end of the central shaft is provided with an air extraction hole, which is connected to the interior of the central shaft and is used to connect to a vacuum pumping device. A sealing plate is provided inside the other end of the central shaft.

9. The vacuum adsorption roller according to claim 2, characterized in that, The first cover plate has an annular first protrusion at one end near the first mounting member. The first protrusion is disposed inside the first mounting member and its outer peripheral surface is sealed to the inner peripheral surface of the first mounting member. The second cover plate has a second protrusion at one end near the second mounting member. The second protrusion is disposed inside the second mounting member and its outer peripheral surface is sealed to the inner peripheral surface of the second mounting member.

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