A thin paper suction device with a suction head self-adaptive adjustment and a control method thereof

Abstract

The application discloses a thin paper adsorption device with a suction head self-adaptive adjustment function and a control method thereof. The device comprises a connecting seat, four swing arm units capable of overlapping along the diagonal lines of different rectangular size thin papers are arranged on the connecting seat, the four swing arm units are arranged towards the diagonal line directions of different angles, a synchronous angle adjustment unit is arranged between the four swing arm units, two movable suction head units are arranged on the swing arm unit along the swing arm unit path interval, a differential transmission unit for controlling the differential movement of the two movable suction head units is arranged on the swing arm unit, and the differential transmission unit can control the two movable suction head units to move towards the outer end at different speeds. The technical problem that the adsorption device in the prior art is difficult to consider the change of the length-width ratio of different rectangular size thin papers and the uniform layout adsorption of the suction head is solved.

Description

Technical Field

[0001] This invention relates to the field of automated printing and post-printing processing, paper handling equipment technology, and in particular to a thin paper adsorption device with adaptive suction head adjustment and its control method. Background Technology

[0002] In automated production lines for printing, packaging, and post-printing of thin paper, automatic paper feeders or suction grippers are key equipment for achieving automatic paper transfer. Due to the wide variety of specifications of printed or packaged products, the thin paper to be gripped often undergoes dimensional changes (such as different lengths and widths) and aspect ratios during the production process.

[0003] Traditional adsorption devices have fixed suction head positions or can only perform overall unidirectional mechanical movement, failing to flexibly and adaptively adjust to changes in the diagonal angle and length of paper of different rectangular sizes. If the suction heads are unevenly distributed, the thin paper is prone to sagging, wrinkling, air leakage, or localized tearing during adsorption and lifting. On the other hand, using multiple motors to independently drive the fine-tuning of each suction head would result in an extremely complex control system with a high failure rate. Therefore, how to achieve uniform and adaptive adsorption of suction heads on the surface of thin paper of different rectangular sizes (especially at the four corners and the middle of the diagonal) through a simple and efficient mechanical structure is a technical problem that urgently needs to be solved in this field.

[0004] Therefore, the existing technologies for automated printing and post-press processing, and paper handling equipment need further improvement. Summary of the Invention

[0005] The purpose of this invention is to provide a tissue paper adsorption device and its control method with adaptive suction head adjustment, aiming to solve the technical problem in the prior art that adsorption devices are difficult to balance the changes in the aspect ratio of tissue paper of different rectangular sizes with the uniform layout of the suction head.

[0006] To achieve the above objectives, the present invention adopts the following solution:

[0007] A tissue paper adsorption device with adaptive suction head adjustment includes a connecting base. The connecting base is equipped with four swing arm units that can overlap along the diagonals of tissue papers of different rectangular sizes. The four swing arm units are oriented towards the diagonals at different angles. A synchronous deflection angle adjustment unit is provided between the four swing arm units. Two movable suction head units are spaced apart along the path of each swing arm unit. A differential transmission unit is provided on each swing arm unit to control the differential movement of the two movable suction head units. The differential transmission unit can control the two movable suction head units to move outwards at different speeds. The connecting base is equipped with a synchronous drive unit to control the synchronous movement of the multiple differential transmission units in four directions.

[0008] Furthermore, the connecting seat includes a top plate and a bottom plate disposed below the top plate, and a plurality of connecting guide posts are disposed between the top plate and the bottom plate.

[0009] Furthermore, the swing arm unit includes a pivot mounting base disposed on the base plate, a pivot body is rotatably mounted in the pivot mounting base, and a swing arm is provided extending outward from the lower end of the pivot body;

[0010] The four rotating shaft mounting bases are arranged in an array at the four corners.

[0011] Furthermore, the synchronous deflection angle adjustment unit includes bottom gears disposed on the upper ends of the two rotating shafts on the same side, and top gears disposed on the upper ends of the two rotating shafts on the other side. The two bottom gears on the same side mesh with each other for transmission, and the two top gears on the other side mesh with each other for transmission. A transmission gear is disposed on the upper end face of one of the bottom gears, and the transmission gear meshes with one of the top gears for transmission. An active motor coupling is disposed on the base plate and connected to the end face of the transmission gear.

[0012] Furthermore, it also includes a straight guide groove structure disposed on the swing arm unit along the path of the swing arm unit. The movable suction head unit includes a slider disposed on the straight guide groove structure. A suction head is disposed at the lower end of the slider and an air pipe connecting pipe is disposed at the upper end. The air pipe connecting pipe and the suction head are connected.

[0013] Furthermore, the differential transmission unit includes a rotating shaft unit disposed on one side of the straight guide groove structure and arranged parallel to the straight guide groove structure. The outer circumferential wall of the rotating shaft unit near its outer end is provided with a first external transmission thread, and the outer circumferential wall near its inner end is provided with a second external transmission thread. The two sliders on the same swing arm unit are respectively provided with a first threaded sleeve and a second threaded sleeve. The first threaded sleeve and the second threaded sleeve are sleeved on the rotating shaft unit and are threadedly connected to the first external transmission thread and the second external transmission thread, respectively.

[0014] Furthermore, the ratio of the pitch of the first transmission external thread to the pitch of the second transmission external thread is 2:1.

[0015] Furthermore, the synchronous drive unit includes a lifting plate disposed between the top plate and the bottom plate. The lifting plate is provided with a plurality of vertical guide holes that can be fitted onto a corresponding connecting guide post for vertical guiding movement. A drive motor is disposed on the bottom plate. The output end of the drive motor is coupled to a drive screw. A lifting screw hole is provided in the middle of the lifting plate. The drive screw passes through the lifting screw hole and is threadedly connected to the lifting screw hole. Each rotating shaft unit and the lifting plate are provided with a linkage reversing drive unit.

[0016] Furthermore, the linkage reversing drive unit includes a control gear disposed at one end of the rotating shaft unit. A vertical rack mounting seat is disposed on the swing arm unit on one side of the control gear. A transmission rack is movably disposed in the vertical rack mounting seat. The transmission rack and the control gear mesh and drive each other. A control shaft is disposed at the upper end of the transmission rack. Arc-shaped guide grooves are disposed at the four corners of the lifting plate. The arc center of the arc-shaped guide groove is concentric with the axial center of a corresponding rotating shaft. The control shaft is inserted into a corresponding arc-shaped guide groove. An upper limit plate and a lower limit plate are disposed on the control shaft. The upper limit plate and the lower limit plate are respectively attached to the upper and lower surfaces of the lifting plate.

[0017] A control method includes the following steps:

[0018] Step S1: Obtain the geometric dimensions of the paper to be adsorbed, including the length and width of the paper;

[0019] Step S2: Calculate the diagonal tilt angle of the thin paper based on its length and width, and control the synchronous tilt angle adjustment unit to drive the four swing arm units to synchronously tilt to the diagonal tilt angle, so that the swing paths of the four swing arm units overlap with the four diagonals of the thin paper respectively.

[0020] Step S3: Calculate the diagonal half length of the thin paper based on its length and width, and control the synchronous drive unit to drive each differential transmission unit to operate synchronously based on the diagonal half length;

[0021] Step S4: Driven by the differential transmission unit, the two movable suction head units located on the same swing arm unit move synchronously outward along the path of the swing arm unit at a preset speed ratio until the outer movable suction head unit moves to a preset position close to the corner of the thin paper, and the inner movable suction head unit stops at the midpoint of the half length of the diagonal.

[0022] Step S5: Control the suction head of each of the movable suction head units to conduct negative pressure air path, so as to complete the uniform layout and adsorption of the thin paper.

[0023] In summary, the advantages of this invention over the prior art are:

[0024] This invention addresses the shortcomings of existing automated printing and post-press processing, and paper handling equipment. Through its structural design, it offers the following advantages: By driving four swing arm units to rotate synchronously through a synchronous deflection angle adjustment unit, the four swing arms can precisely overlap the diagonals of rectangular papers with different aspect ratios, overcoming the limitations of traditional fixed-angle mechanisms that have poor adaptability to irregularly shaped or non-square papers. Utilizing a 2:1 pitch ratio between the first and second transmission external threads, only a single drive source is needed to ensure that the outer suction head always stays firmly against the four corners of the paper, and the inner suction head automatically stops at the midpoint of the diagonal, guaranteeing an absolutely uniform distribution of suction force on the thin paper surface and greatly reducing the complexity of the electrical control system. It cleverly solves the problem of motion interference, ensuring smooth differential rotation of the screw at any angle. Attached Figure Description

[0025] Figure 1 This is the front view of the present invention;

[0026] Figure 2 This is the left view of the present invention;

[0027] Figure 3 For the present invention Figure 2 Sectional view along line BB;

[0028] Figure 4 This is a bottom view of the present invention;

[0029] Figure 5 This is one of the exploded views of the present invention;

[0030] Figure 6 This is the second exploded view of the present invention;

[0031] Figure 7 This is the third exploded view of the present invention;

[0032] Figure 8 For the present invention Figure 7 A magnified view of a portion at point C;

[0033] Figure 9 This is a schematic diagram of the adaptive layout and geometric principle of the suction head of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-9This invention provides a tissue paper adsorption device with adaptive suction head adjustment, including a connecting base 1. The connecting base 1 has four swing arm units 2 that can overlap along the diagonals of tissue papers of different rectangular sizes. The four swing arm units 2 are arranged facing diagonal directions at different angles. A synchronous deflection angle adjustment unit 3 is arranged between the four swing arm units 2. Two movable suction head units 4 are arranged at intervals along the path of each swing arm unit 2. A differential transmission unit 5 is provided on each swing arm unit 2 to control the differential movement of the two movable suction head units 4. The differential transmission unit 5 can control the two movable suction head units 4 to move at different speeds. Moving outwards allows for adaptive adjustment based on the diagonal length of the thin paper, ensuring that the outer movable suction head unit 4 is always close to the corner of the thin paper, while the inner movable suction head unit 4 is always centered on the diagonal of thin paper of different sizes. This structure allows the swing arm unit 2 to overlap on the corresponding diagonals of paper of different rectangular sizes, and enables the four inner movable suction head units 4 to be positioned at the center of their respective diagonals according to the size of the rectangular paper, achieving uniform surface adsorption of thin paper of different rectangular sizes. The connecting seat 1 is equipped with a synchronous drive unit 6 for controlling the synchronous movement of multiple differential transmission units 5 in four directions.

[0036] The connecting seat 1 of the present invention includes a top plate 101 and a bottom plate 102 disposed below the top plate 101, and a plurality of connecting guide posts 103 are disposed between the top plate 101 and the bottom plate 102.

[0037] The swing arm unit 2 of the present invention includes a rotating shaft mounting base 201 disposed on the base plate 102, a rotating shaft body 202 rotatably mounted in the rotating shaft mounting base 201, and a swing arm 203 extending outward from the lower end of the rotating shaft body 202;

[0038] The four rotating shaft mounting bases 201 are arranged in an array at the four corners.

[0039] The synchronous deflection angle adjustment unit 3 of the present invention includes bottom gears 301 disposed on the upper ends of the two rotating shafts 202 on the same side, and top gears 302 disposed on the upper ends of the two rotating shafts 202 on the other side. The two bottom gears 301 on the same side mesh with each other for transmission, and the two top gears 302 on the other side mesh with each other for transmission. A transmission gear 303 is disposed on the upper end face of one of the bottom gears 301. The transmission gear 303 meshes with one of the top gears 302 for transmission. An active motor coupling is disposed on the base plate 102 and connected to the end face of the transmission gear 303.

[0040] The present invention also includes a straight guide groove structure 401 disposed on the swing arm unit 2 along the path of the swing arm unit 2, and the movable suction head unit 4 includes a slider 402 disposed on the straight guide groove structure 401. The lower end of the slider 402 is provided with a suction head 403, and the upper end is provided with an air pipe connecting pipe 404. The air pipe connecting pipe 404 and the suction head 403 are connected.

[0041] The differential transmission unit 5 of the present invention includes a rotating shaft unit 501 disposed on one side of the straight guide groove structure 401 and disposed parallel to the straight guide groove structure 401. The outer circumferential wall of the rotating shaft unit 501 near the outer end is provided with a first transmission external thread 502, and the outer circumferential wall near the inner end is provided with a second transmission external thread 503. Two sliders 402 on the same swing arm unit 2 are respectively provided with a first threaded sleeve 504 and a second threaded sleeve 505. The first threaded sleeve 504 and the second threaded sleeve 505 are sleeved on the rotating shaft unit 501 and are threadedly connected to the first transmission external thread 502 and the second transmission external thread 503, respectively.

[0042] The pitch ratio of the first transmission external thread 502 to the second transmission external thread 503 in this invention is 2:1.

[0043] The synchronous drive unit 6 of the present invention includes a lifting plate 601 disposed between the top plate 101 and the bottom plate 102. The lifting plate 601 has multiple vertical guide holes 602 that can be fitted onto a corresponding connecting guide post 103 for vertical guiding movement. A drive motor 603 is disposed on the bottom plate 102. The output end of the drive motor 603 is coupled to a drive screw 604. A lifting screw hole 605 is disposed in the middle of the lifting plate 601, and the drive screw 604 passes through the lifting screw hole 605 and is connected to the connecting guide post 103. The lifting screw hole 605 is threaded to connect the rotating shaft unit 501 and the lifting plate 601. Each of the rotating shaft unit 501 and the lifting plate 601 is provided with a holding linkage reversing drive unit 606. The holding linkage reversing drive unit 606 can drive the rotating shaft unit 501 to rotate forward and backward through the lifting of the lifting plate 601. Since the rotating shaft unit 501 will change with the angle of the swing arm unit 2, the holding linkage reversing drive unit 606 can always control the rotating shaft unit 501 to rotate at different swing angles.

[0044] The linkage reversing drive unit 606 of the present invention includes a control gear 6061 disposed at one end of the rotating shaft unit 501. A vertical rack mounting seat 6062 is disposed on the swing arm unit 2 on one side of the control gear 6061. A transmission rack 6063 is movably disposed vertically within the vertical rack mounting seat 6062. The transmission rack 6063 meshes with the control gear 6061. A control shaft 6064 is disposed at the upper end of the transmission rack 6063. Arc-shaped guide grooves 6065 are respectively disposed at the four corners of the lifting plate 601. The center of the arc of the arc guide groove 6065 corresponds to one of the rotating shafts. The body 202 is concentrically arranged along its axial center. The control shaft 6064 is inserted into a corresponding arc-shaped guide groove 6065. The control shaft 6064 is provided with an upper limit plate 6066 and a lower limit plate 6067. The upper limit plate 6066 and the lower limit plate 6067 are respectively attached to the upper and lower surfaces of the lifting plate 601. Through the cooperation of the lifting plate 601, the upper limit plate 6066 and the lower limit plate 6067, the transmission rack 6063 can move up and down synchronously with the lifting plate 601. At the same time, the arc-shaped guide groove 6065 does not interfere with the control shaft 6064 following the angular swing of the swing arm unit 2.

[0045] A control method for a tissue paper adsorption device with adaptive suction head adjustment includes the following steps:

[0046] Step S1: Obtaining dimensions and parameters: Obtain the geometric dimensions of the paper to be adsorbed, including the length and width of the paper;

[0047] Step S2 Diagonal overlap control: Calculate the diagonal tilt angle of the thin paper based on its length and width, and control the synchronous deflection angle adjustment unit 3 to drive the four swing arm units 2 to synchronously deflect to the diagonal tilt angle, so that the swing paths of the four swing arm units 2 overlap with the four diagonals of the thin paper respectively.

[0048] Step S3: Diagonal length calculation and drive control: Calculate the half length of the diagonal of the thin paper based on its length and width, and control the synchronous drive unit 6 to drive each differential transmission unit 5 to operate synchronously based on the half length of the diagonal.

[0049] Step S4: Differential speed adaptive suction head position: Under the drive of the differential transmission unit 5, the two movable suction head units 4 located on the same swing arm unit 2 move synchronously outward along the path of the swing arm unit 2 at a preset speed ratio until the outer movable suction head unit 4 moves to a preset position close to the corner of the thin paper, and the inner movable suction head unit 4 stops at the midpoint of the half length of the diagonal.

[0050] Step S5 Adsorption control: Control the suction head 403 of each of the movable suction head units 4 to conduct negative pressure air path, so as to complete the uniform layout adsorption of the thin paper.

[0051] This embodiment provides a tissue paper adsorption device with adaptive suction head adjustment, including a connecting base 1. The connecting base 1 includes a top plate 101 and a bottom plate 102, which are fixedly connected by multiple connecting guide posts 103 to form a stable support frame structure. Four rotating shaft mounting seats 201 are arranged in an array at the four corners on the bottom plate 102 of the connecting base 1. A rotating shaft body 202 is rotatably mounted inside the rotating shaft mounting seat 201, and a swing arm 203 is fixedly attached to the lower end of the rotating shaft body 202. The rotating shaft mounting seat 201, the rotating shaft body 202, and the swing arm 203 together constitute a swing arm unit 2.

[0052] Four swing arm units 2 can extend towards the four diagonals of the rectangular thin paper, respectively. To enable the four swing arms 203 to synchronously adjust their deflection angles according to the aspect ratio of different rectangular papers, a synchronous deflection angle adjustment unit 3 is provided on the base plate 102. The synchronous deflection angle adjustment unit 3 includes bottom gears 301 disposed on the upper ends of two rotating shafts 202 on the same side, and top gears 302 disposed on the upper ends of two rotating shafts 202 on the other side. The two bottom gears 301 on the same side mesh with each other for transmission, and the two top gears 302 on the other side mesh with each other for transmission. A transmission gear 303 is fixed to the upper end face of one of the bottom gears 301, and the transmission gear 303 meshes with one of the top gears 302 for transmission.

[0053] An active motor is mounted on the base plate 102, and the output shaft of the active motor is coupled to the transmission gear 303. When the active motor rotates, through the cascade meshing of the transmission gear 303, the bottom gear 301 and the top gear 302, it drives the four rotating shafts 202 and the corresponding swing arms 203 to change their deflection angles synchronously, left, right and forward and backward, so as to precisely overlap the four diagonals of the rectangular thin paper to be adsorbed.

[0054] Each swing arm 203 has a straight guide groove structure 401 along its length. Two movable suction head units 4 are installed at intervals on the straight guide groove structure 401. The movable suction head unit 4 includes a slider 402 that is slidably disposed on the straight guide groove structure 401. The lower end of the slider 402 is equipped with a suction head 403, and the upper end is equipped with an air pipe connecting pipe 404. The air pipe connecting pipe 404 is connected to the internal air passage of the suction head 403 and connected to a negative pressure air source.

[0055] In order to enable the two sliders 402 on the same swing arm 203 to move at different speeds automatically according to the paper size, a rotating shaft unit 501 (the core component of the differential transmission unit 5) is installed on the swing arm 203 parallel to the straight guide groove structure 401.

[0056] The outer circumferential wall of the rotating shaft unit 501 near its outer end is machined with a first transmission external thread 502, and the outer circumferential wall near its inner end is machined with a second transmission external thread 503. The pitch ratio of the first transmission external thread 502 to the pitch ratio of the second transmission external thread 503 is strictly set to 2:1.

[0057] A first threaded sleeve 504, which mates with the first transmission external thread 502, is fixed on the outer slider 402, and a second threaded sleeve 505, which mates with the second transmission external thread 503, is fixed on the inner slider 402. When the rotating shaft unit 501 rotates, the moving speed and stroke of the first threaded sleeve 504 are exactly twice that of the second threaded sleeve 505, thus ensuring that the outer suction head always stays at the corner of the paper, and the inner suction head always stays precisely at the midpoint of the diagonal.

[0058] To centrally control the synchronous rotation of the four rotating shaft units 501, a synchronous drive unit 6 is provided on the connecting base 1. The synchronous drive unit 6 includes a lifting plate 601 slidably sleeved on the connecting guide post 103, with a vertical guide hole 602 on the lifting plate 601 that mates with the connecting guide post 103. A drive motor 603 is fixed on the base plate 102, driving a drive screw 604 to rotate. The drive screw 604 is threadedly engaged with a lifting screw hole 605 in the middle of the lifting plate 601, driving the lifting plate 601 to smoothly move up and down. The lifting plate 601 is connected to each rotating shaft unit 501 via a linkage-reversing drive unit 606. The linkage-reversing drive unit 606 includes a control gear 6061 fixed to the end of the rotating shaft unit 501.

[0059] A vertical rack mounting base 6062 is fixed on the swing arm 203, and a transmission rack 6063 that meshes with the control gear 6061 is slidably mounted inside it. A control shaft 6064 extends from the upper end of the transmission rack 6063. Arc-shaped guide grooves 6065 are respectively opened at the four corners of the lifting plate 601, and the arc center of the arc-shaped guide groove 6065 coincides with the axis of the corresponding rotating shaft body 202. The control shaft 6064 passes through the arc-shaped guide groove 6065, and an upper limit plate 6066 and a lower limit plate 6067 are fixed on the control shaft 6064, which clamp and adhere to the upper and lower surfaces of the lifting plate 601.

[0060] When the lifting plate 601 moves up and down, the limit plate forcibly drives the transmission rack 6063 to move up and down, thereby driving the control gear 6061 and the rotating shaft unit 501 to rotate; while when the swing arm 203 changes angle, the control shaft 6064 slides freely in the arc-shaped guide groove 6065, without any motion interference.

[0061] Work process and control flow

[0062] Size acquisition: The length L and width W of the paper to be adsorbed are obtained through sensors or system settings.

[0063] Diagonal angle adaptation: The controller calculates the diagonal tilt angle: θ = arctan(W / L);

[0064] The active motor drives the synchronous deflection angle adjustment unit 3, causing the four swing arms 203 to rotate and deflect until they completely overlap with the four diagonals of the thin paper.

[0065] Differential speed adaptive suction head position:

[0066] The controller calculates the half-length of the paper's diagonal: D = √(L² + W²) / 2

[0067] The drive motor 603 is started to drive the lifting plate 601 to rise and fall. The lifting plate 601 drives the four rotating shaft units 501 to rotate synchronously through the linkage reversing drive unit 606.

[0068] Since the pitch ratio is 2:1, the outer movable suction head moves a distance of D (to reach the corner of the paper), and the inner movable suction head moves a distance of D / 2 (to reach the midpoint of the diagonal).

[0069] Uniform negative pressure adsorption: The suction head 403 is attached to the paper, and the air tube 404 conducts the negative pressure air source to achieve uniform adsorption and transfer of the entire surface of the thin paper with high stability and no tearing.

[0070] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tissue paper adsorption device with adaptive suction head adjustment, comprising a connecting base (1), characterized in that: The connecting seat (1) is provided with four swing arm units (2) that can overlap along the diagonals of thin paper of different rectangular sizes. The four swing arm units (2) are arranged in diagonal directions at different angles. A synchronous deflection angle adjustment unit (3) is provided between the four swing arm units (2). Two movable suction head units (4) are arranged at intervals along the path of the swing arm unit (2). A differential transmission unit (5) is provided on the swing arm unit (2) for controlling the differential movement of the two movable suction head units (4). The differential transmission unit (5) can control the two movable suction head units (4) to move outward at different speeds. A synchronous drive unit (6) is provided on the connecting seat (1) for controlling the synchronous movement of multiple differential transmission units (5) in four directions.

2. The tissue paper adsorption device with adaptive suction head adjustment according to claim 1, characterized in that: The connecting seat (1) includes a top plate (101) and a bottom plate (102) disposed below the top plate (101). Multiple connecting guide posts (103) are disposed between the top plate (101) and the bottom plate (102).

3. The paper adsorption device with adaptive suction head adjustment according to claim 2, characterized in that: The swing arm unit (2) includes a rotating shaft mounting base (201) disposed on the base plate (102), a rotating shaft body (202) is rotatably mounted in the rotating shaft mounting base (201), and a swing arm (203) is provided extending outward from the lower end of the rotating shaft body (202). The four rotating shaft mounting bases (201) are arranged in an array at the four corners.

4. The tissue paper adsorption device with adaptive suction head adjustment according to claim 3, characterized in that: The synchronous deflection angle adjustment unit (3) includes bottom gears (301) disposed on the upper ends of the two rotating shafts (202) on the same side, and top gears (302) disposed on the upper ends of the two rotating shafts (202) on the other side. The two bottom gears (301) on the same side mesh with each other for transmission, and the two top gears (302) on the other side mesh with each other for transmission. A transmission gear (303) is disposed on the upper end face of one of the bottom gears (301). The transmission gear (303) meshes with one of the top gears (302) for transmission. An active motor coupling is disposed on the base plate (102) and connected to the end face of the transmission gear (303).

5. A tissue paper adsorption device with adaptive suction head adjustment according to claim 4, characterized in that: It also includes a straight guide groove structure (401) disposed on the swing arm unit (2) along the path of the swing arm unit (2). The movable suction head unit (4) includes a slider (402) disposed on the straight guide groove structure (401). A suction head (403) is disposed at the lower end of the slider (402) and an air pipe connecting pipe (404) is disposed at the upper end. The air pipe connecting pipe (404) and the suction head (403) are connected.

6. The tissue paper adsorption device with adaptive suction head adjustment according to claim 5, characterized in that: The differential transmission unit (5) includes a rotating shaft unit (501) disposed on one side of the straight guide groove structure (401) and parallel to the straight guide groove structure (401). The rotating shaft unit (501) has a first transmission external thread (502) on its outer circumferential wall near the outer end and a second transmission external thread (503) on its outer circumferential wall near the inner end. The two sliders (402) on the same swing arm unit (2) are respectively provided with a first threaded sleeve (504) and a second threaded sleeve (505). The first threaded sleeve (504) and the second threaded sleeve (505) are sleeved on the rotating shaft unit (501) and are threadedly connected to the first transmission external thread (502) and the second transmission external thread (503) respectively.

7. A tissue paper adsorption device with adaptive suction head adjustment according to claim 6, characterized in that: The pitch ratio of the first transmission external thread (502) to the pitch ratio of the second transmission external thread (503) is 2:

1.

8. A tissue paper adsorption device with adaptive suction head adjustment according to claim 7, characterized in that: The synchronous drive unit (6) includes a lifting plate (601) disposed between the top plate (101) and the bottom plate (102). The lifting plate (601) is provided with a plurality of vertical guide holes (602) that can be sleeved on a corresponding connecting guide post (103) for vertical guiding movement. The bottom plate (102) is provided with a drive motor (603). The output end of the drive motor (603) is coupled to a drive screw (604). The middle part of the lifting plate (601) is provided with a lifting screw hole (605). The drive screw (604) passes through the lifting screw hole (605) and is threadedly connected to the lifting screw hole (605). Each rotating shaft unit (501) and the lifting plate (601) are provided with a linkage reversing drive unit (606).

9. A tissue paper adsorption device with adaptive suction head adjustment according to claim 8, characterized in that: The linkage reversing drive unit (606) includes a control gear (6061) disposed at one end of the rotating shaft unit (501). A vertical rack mounting seat (6062) is disposed on the swing arm unit (2) on one side of the control gear (6061). A transmission rack (6063) is movably disposed vertically within the vertical rack mounting seat (6062). The transmission rack (6063) meshes with the control gear (6061). A control shaft (6064) is disposed at the upper end of the transmission rack (6063). The lifting plate (601) is provided with arc-shaped guide grooves (6065) at its four corners. The center of the arc of the arc-shaped guide groove (6065) is concentric with the axial center of a corresponding rotating shaft (202). The control shaft (6064) is inserted into a corresponding arc-shaped guide groove (6065). The control shaft (6064) is provided with an upper limit plate (6066) and a lower limit plate (6067). The upper limit plate (6066) and the lower limit plate (6067) are respectively attached to the upper and lower surfaces of the lifting plate (601).

10. A control method for a tissue paper adsorption device with adaptive suction head adjustment, applied to the tissue paper adsorption device as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Step S1: Obtaining dimensions and parameters: Obtain the geometric dimensions of the paper to be adsorbed, including the length and width of the paper; Step S2 Diagonal overlap control: Calculate the diagonal tilt angle of the thin paper according to the length and width of the thin paper, and control the synchronous deflection angle adjustment unit (3) to drive the four swing arm units (2) to deflect synchronously to the diagonal tilt angle, so that the swing paths of the four swing arm units (2) overlap with the four diagonals of the thin paper respectively; Step S3: Diagonal length calculation and drive control: Calculate the half length of the diagonal of the thin paper based on the length and width of the thin paper, and control the synchronous drive unit (6) to drive each of the differential transmission units (5) to move synchronously based on the half length of the diagonal; Step S4 Differential Adaptation of Suction Head Position: Driven by the differential transmission unit (5), the two movable suction head units (4) located on the same swing arm unit (2) move synchronously outward along the path of the swing arm unit (2) at a preset speed ratio until the outer movable suction head unit (4) moves to a preset position close to the corner of the thin paper, and the inner movable suction head unit (4) stops at the midpoint of the half length of the diagonal. Step S5 Adsorption control: Control the suction head (403) of each of the active suction head units (4) to conduct negative pressure air path to complete the uniform layout adsorption of the thin paper.

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