Outer winding winding and rolling structure

Abstract

This utility model discloses an external winding and unwinding structure, relating to the field of slitting machine technology. It includes a first base plate, a second base plate, a first fixed plate, a support frame, and a first movable plate. A second movable plate is disposed above the second base plate. The top of the first movable plate is fixedly connected to the second fixed plate, which is located at the top of the second movable plate and is fixedly connected to it. An air shaft is disposed above the second fixed plate. A feeding mechanism for convenient paper unwinding is disposed on the first movable plate. This utility model, through the feeding mechanism, can automatically release the air shaft from its lock and move it to the unwinding station by flipping it over. After unloading, it automatically resets by flipping over, facilitating convenient unwinding of the paper roll after winding, thereby further improving production efficiency and reducing manual labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of slitting machine technology, specifically to an external winding and unwinding structure. Background Technology

[0002] Paper slitting machines are core intermediate processing equipment in the papermaking, printing and packaging industries. Based on the production needs of office and household paper, they cut large rolls of base paper into multiple narrow strips or strips of specific lengths using high precision. The core workflow consists of unwinding, traction and correction, slitting and rewinding.

[0003] Existing paper slitting machines typically use air shafts as the core for winding the slit paper, driven by a motor. When the winding diameter reaches a set value, the machine must be stopped for unloading to replace the empty core and continue winding. Unloading is usually done manually or with semi-automatic mechanical assistance (such as hydraulic lifting mechanisms or simple lifting platforms). Manual unloading is labor-intensive, inefficient, and poses significant safety hazards during handling. Semi-automatic unloading still requires manual disengagement and engagement of the coupling, resulting in poor unloading efficiency. To further improve unloading efficiency, an external winding and unwinding structure is now provided, eliminating the drawbacks of existing devices. Utility Model Content

[0004] The purpose of this invention is to provide an external winding and unwinding structure to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An external winding and unwinding structure includes a first base plate, a second base plate at one end of the first base plate, two first fixing plates symmetrically fixedly connected to one end of the first base plate, the two first fixing plates being located between the first base plate and the second base plate, and both first fixing plates being fixedly connected to the second base plate, a support frame fixedly connected to one side of the first base plate, the support frame being fixedly connected to the second base plate, a first movable plate above the first base plate, a second movable plate above the second base plate, a second fixing plate fixedly connected to the top of the first movable plate, the second fixing plate being located at the top of the second movable plate, the second fixing plate being fixedly connected to the second movable plate, an air shaft above the second fixing plate, and a feeding mechanism for convenient paper feeding on the first movable plate;

[0007] The feeding mechanism includes:

[0008] A left wall panel is fixedly connected to the top of the first movable plate. A support base is installed at the top of the second movable plate. A right wall panel is provided at one end of the support base. The right wall panel is fixedly connected to the second movable plate. The air shaft and the second fixed plate are both located between the left wall panel and the right wall panel. A sliding groove for the end shaft to move is opened at the position where the support base and the end shaft of the air shaft meet.

[0009] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0010] In one alternative embodiment, the feeding mechanism further includes:

[0011] A flip-up assembly mounted on a support base;

[0012] The flipping component includes:

[0013] A support rotating rod is fixedly connected to one end of the support base. The left wall plate and the right wall plate are both fixedly connected to the outer wall of the support rotating rod. The outer wall of the support rotating rod is symmetrically fitted with a left arm and a right arm. The left arm and the right arm are located between the left wall plate and the right wall plate. The left arm is located at the end of the air shaft away from the right wall plate. The right arm is rotatably fitted with the outer wall of the air shaft.

[0014] The left arm is provided with a first limiting component for supporting and limiting the air shaft;

[0015] The support base is provided with a second limiting component for supporting and limiting the air shaft;

[0016] The support rod is equipped with a first drive component for driving the left and right arms to rotate independently.

[0017] In one alternative: the first limiting component includes a positioning cylinder installed at the end of the left arm away from the air shaft, a positioning groove for the positioning cylinder to slide is provided at the position where the left wall plate connects with the positioning cylinder, the output end of the positioning cylinder is rotatably connected to a docking block, the docking block is located at the end of the left arm away from the positioning cylinder, and the air shaft is slidably sleeved on the outer wall of the docking block.

[0018] In one alternative embodiment: the second limiting assembly includes a coupling disposed inside the support base. The coupling includes a driving end, a driven end, and an elastic element. The elastic element is located between the driving end and the driven end. The elastic element is fixedly connected to the driving end by bolts. One end of the driven end is circumferentially formed with multiple toothed blocks at equal intervals. A toothed groove that matches the outer wall of the toothed block is opened at the contact position between the elastic element and the toothed block. The driven end is fixedly connected to the end shaft of the air shaft. A supporting cylinder is installed inside the support base. A fixed push plate is fixedly connected to the output end of the supporting cylinder. The fixed push plate is rotatably sleeved on the outer wall of the transmission slide rod. The driving end is located at the end of the transmission slide rod away from the supporting cylinder. The driving end is fixedly connected to the transmission slide rod.

[0019] A second drive assembly is provided on the support base.

[0020] In one alternative embodiment: the second driving component includes:

[0021] A first synchronous pulley is rotatably connected inside the support base. A first transmission belt is sleeved on the outer wall of the first synchronous pulley. A second synchronous pulley is sleeved on the side of the first transmission belt away from the first synchronous pulley. A third synchronous pulley is fixedly connected to the end of the first synchronous pulley away from the right wall plate. A second transmission belt is sleeved on the outer wall of the third synchronous pulley. A fourth synchronous pulley is sleeved on the side of the second transmission belt away from the third synchronous pulley. The fourth synchronous pulley is slidably sleeved on the outer wall of the transmission slide rod. A limit slider is fixedly connected to the inner wall of the fourth synchronous pulley. A guide groove is provided at the position where the transmission slide rod and the limit slider meet, allowing the limit slider to slide. The second synchronous pulley is driven by the output end of the winding motor.

[0022] In one alternative embodiment: the first driving component includes:

[0023] Two spur gears are symmetrically arranged on one side of the supporting rotating rod, and the two spur gears are respectively located above the first moving plate and the second moving plate. Two spur gear rings are symmetrically rotatably sleeved on the outer wall of the supporting rotating rod, and the two spur gear rings are respectively meshed with the two spur gears. The two spur gear rings are located between the left arm and the right arm, and the two spur gear rings are respectively fixedly connected to the left arm and the right arm. The inner wall of each of the two spur gear rings is integrally formed with a connecting rotating ring. A limiting rotating groove is opened at the position where the supporting rotating rod connects with the connecting rotating ring for the connecting rotating ring to rotate. Two drive motors are symmetrically arranged on one side of the supporting rotating rod, and the two drive motors are respectively fixedly connected to the first moving plate and the second moving plate. The two spur gears are respectively driven by the output ends of the two drive motors.

[0024] In one alternative embodiment: a slitting assembly is installed on the inner side of the support frame, and two winding traction rollers are symmetrically arranged below the slitting assembly. Both winding traction rollers are rotatably connected to the support frame. Two fixing cylinders are symmetrically installed at the bottom of the inner wall of the support frame. Both fixing cylinders are located below the two winding traction rollers. An inner winding assembly is provided on the inner side of the support frame. Both fixing cylinders are located between the first base plate and the inner winding assembly. Another second fixing plate is provided on the inner winding assembly, and the output ends of the two fixing cylinders are respectively fixedly connected to the two second fixing plates.

[0025] In one alternative: two first guide rails are symmetrically fixedly connected to the top of the first base plate, and two first slides are symmetrically fixedly connected to the bottom of the first movable plate, with the two first slides respectively slidably sleeved on the outer walls of the two first guide rails.

[0026] In one alternative: two second guide rails are symmetrically fixedly connected to the top of the second base plate, and two second slides are symmetrically fixedly connected to the bottom of the second movable plate, with the two second slides respectively slidingly sleeved on the outer walls of the two second guide rails.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] 1. This utility model can automatically release the air shaft lock through the feeding mechanism and transfer it to the feeding station by flipping it over. After unloading, it can automatically reset by flipping over, so as to facilitate the feeding of paper rolls after the paper is rolled up, thereby further improving production efficiency and reducing the intensity of manual operation.

[0029] 2. This utility model can precisely control the distance between the air shaft and the winding traction roller by adjusting the position of the second fixed plate through the fixed cylinder, so that the outer wall of the paper roll is always in contact with the outer wall of the winding traction roller. The speed difference between the air shaft and the winding traction roller can ensure the stability of the paper winding tension, effectively prevent paper wrinkling and deformation, and thus ensure the quality of the finished product. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model.

[0031] Figure 2 This is a schematic diagram of the connection structure between the positioning cylinder and the left arm of this utility model.

[0032] Figure 3 This is a schematic diagram of the connection structure between the spur gear and the spur gear ring of this utility model.

[0033] Figure 4 This is a schematic diagram of the second drive component of this utility model.

[0034] Figure 5 This is a schematic diagram of the connection structure between the coupling and the first air shaft of this utility model.

[0035] Figure 6 This is a schematic diagram of the connection structure between the transmission slide rod and the second drive assembly of this utility model.

[0036] Figure reference numerals: 1. First base plate; 201. Positioning cylinder; 202. Left arm; 203. Left wall plate; 204. Spur gear; 205. Spur gear ring; 206. Drive motor; 207. Support rotating rod; 208. Right wall plate; 209. Support seat; 2010. Right arm; 2011. Rewinding motor; 2012. Coupling; 2013. Support cylinder; 2014. Transmission slide rod; 3. Slitting assembly; 4. Rewinding traction roller; 5. Support frame; 6. Air shaft; 7. Second base plate; 8. First fixed plate; 9. First moving plate; 10. Second fixed plate; 11. Second moving plate; 12. Fixed cylinder; 13. Inner rewinding assembly. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] In one embodiment, such as Figures 1-6As shown, the external winding and unwinding structure includes a first base plate 1, a second base plate 7 at one end of the first base plate 1, two first fixing plates 8 symmetrically fixedly connected to one end of the first base plate 1, the two first fixing plates 8 being located between the first base plate 1 and the second base plate 7, and both first fixing plates 8 being fixedly connected to the second base plate 7. A support frame 5 is fixedly connected to one side of the first base plate 1, and the support frame 5 is fixedly connected to the second base plate 7. A first movable plate 9 is arranged above the first base plate 1, and a second movable plate 11 is arranged above the second base plate 7. A second fixing plate 10 is fixedly connected to the top of the first movable plate 9, and the second fixing plate 10 is located at the top of the second movable plate 11, and the second fixing plate 10 is fixedly connected to the second movable plate 11. An air expansion shaft 6 is arranged above the second fixing plate 10. A slitting assembly 3 is installed inside the support frame 5, and two winding traction rollers 4 are symmetrically arranged below the slitting assembly 3, both of which are fixedly connected to the support frame 5. Rotary connection, two fixed cylinders 12 are symmetrically installed on the bottom of the inner wall of the support frame 5. The two fixed cylinders 12 are located below the two winding traction rollers 4. An inner winding assembly 13 is provided on the inner side of the support frame 5. The two fixed cylinders 12 are located between the first base plate 1 and the inner winding assembly 13. Another second fixed plate 10 is provided on the inner winding assembly 13. The output ends of the two fixed cylinders 12 are respectively fixedly connected to the two second fixed plates 10. Two first guide rails are symmetrically fixedly connected to the top of the first base plate 1. Two first slides are symmetrically fixedly connected to the bottom of the first moving plate 9. The two first slides are respectively slidably sleeved on the outer wall of the two first guide rails. Two second guide rails are symmetrically fixedly connected to the top of the second base plate 7. Two second slides are symmetrically fixedly connected to the bottom of the second moving plate 11. The two second slides are respectively slidably sleeved on the outer wall of the two second guide rails. A feeding mechanism for convenient paper feeding is provided on the first moving plate 9.

[0039] The feeding mechanism includes:

[0040] A left wall plate 203 is fixedly connected to the top of the first movable plate 9. A support base 209 is installed at the top of the second movable plate 11. A right wall plate 208 is provided at one end of the support base 209. The right wall plate 208 is fixedly connected to the second movable plate 11. The air shaft 6 and the second fixed plate 10 are both located between the left wall plate 203 and the right wall plate 208. A sliding groove for the end shaft to move is opened at the position where the support base 209 and the end shaft of the air shaft 6 meet.

[0041] In this embodiment, it should be noted that the inner winding assembly 13 is consistent with the outer winding structure, and the inner winding assembly 13 uses another winding traction roller 4 to traction and wind the remaining paper.

[0042] When the fixed cylinder 12 is activated, it drives the second fixed plate 10 to move towards a winding traction roller 4. At this time, the first moving plate 9 and the second moving plate 11, driven by the second fixed plate 10, slide along the outer walls of the first guide rail and the second guide rail respectively through the first slide table and the second slide table until the air shaft 6 contacts the outer wall of a winding traction roller 4.

[0043] Then, the feeding mechanism can drive the air shaft 6 to perform a winding operation on the paper after it has been cut by the slitting component 3. During this process, according to the diameter of the paper winding, the control terminal controls the fixed cylinder 12 to push the second fixed plate 10 to slowly reset. In this way, the stability of the paper winding tension can be ensured by the speed difference between the air shaft 6 and the winding traction roller 4.

[0044] When the paper is wound to the finished diameter, the air shaft 6 can be moved to a handling device such as a trolley or pallet by the unloading mechanism to support the paper. Then the air shaft 6 is activated to retract, so as to unload the paper. When the paper is unloaded, the air shaft 6 can be reset by the unloading mechanism. The above operation can be repeated to continue the winding operation of the slit paper.

[0045] In one embodiment, such as Figures 2-4 As shown, the feeding mechanism also includes:

[0046] A flipping assembly is mounted on the support base 209;

[0047] The flip component includes:

[0048] A support rotating rod 207 is fixedly connected to one end of the support base 209. The left wall plate 203 and the right wall plate 208 are both fixedly connected to the outer wall of the support rotating rod 207. The outer wall of the support rotating rod 207 is symmetrically rotatably sleeved with a left arm 202 and a right arm 2010. The left arm 202 and the right arm 2010 are located between the left wall plate 203 and the right wall plate 208. The left arm 202 is located at the end of the air shaft 6 away from the right wall plate 208. The right arm 2010 is rotatably sleeved on the outer wall of the air shaft 6.

[0049] The left arm 202 is provided with a first limiting component for supporting and limiting the air shaft 6;

[0050] The support base 209 is provided with a second limiting component for supporting and limiting the air shaft 6;

[0051] The support rod 207 is equipped with a first drive assembly for driving the left arm 202 and the right arm 2010 to rotate independently.

[0052] The first limiting component includes a positioning cylinder 201 installed on the left arm 202 away from the air shaft 6. A positioning groove is provided at the junction of the left wall plate 203 and the positioning cylinder 201 for the positioning cylinder 201 to slide. The output end of the positioning cylinder 201 is rotatably connected to a docking block. The docking block is located at the end of the left arm 202 away from the positioning cylinder 201. The air shaft 6 is slidably sleeved on the outer wall of the docking block. Through the cooperation of the flipping component and the first limiting component, the end of the air shaft 6 can be moved and limited.

[0053] In one embodiment, such as Figures 2-6 As shown, the second limiting assembly includes a coupling 2012 disposed inside the support base 209. The coupling 2012 includes an active end, a driven end, and an elastic element. The elastic element is located between the active end and the driven end. The elastic element is fixedly connected to the active end by bolts. One end of the driven end is circumferentially formed with multiple tooth blocks at equal intervals. A tooth groove that matches the outer wall of the tooth block is opened at the position where the elastic element contacts the tooth block. The driven end is fixedly connected to the end shaft of the air shaft 6. A support cylinder 2013 is installed inside the support base 209. A fixed push plate is fixedly connected to the output end of the support cylinder 2013. The fixed push plate is rotatably sleeved on the outer wall of the transmission slide rod 2014. The active end is located at the end of the transmission slide rod 2014 away from the support cylinder 2013. The active end is fixedly connected to the transmission slide rod 2014.

[0054] A second drive assembly is provided on the support base 209;

[0055] The second drive assembly includes: a first synchronous wheel rotatably connected inside the support base 209; a first transmission belt sleeved on the outer wall of the first synchronous wheel; a second synchronous wheel sleeved on the side of the first transmission belt away from the first synchronous wheel; a third synchronous wheel fixedly connected to the end of the first synchronous wheel away from the right wall plate 208; a second transmission belt sleeved on the outer wall of the third synchronous wheel; a fourth synchronous wheel sleeved on the side of the second transmission belt away from the third synchronous wheel; the fourth synchronous wheel slidably sleeved on the outer wall of the transmission slide rod 2014; a limit slider fixedly connected to the inner wall of the fourth synchronous wheel; a guide groove for the limit slider to slide is provided at the position where the transmission slide rod 2014 and the limit slider are connected; the second synchronous wheel is driven by the output end of the winding motor 2011; through the cooperation of the second limit assembly and the second drive assembly, the other end of the air shaft 6 can be moved and limited, and the air shaft 6 can be driven to perform a winding operation on the paper;

[0056] In one embodiment, such as Figures 1-4As shown, the first drive assembly includes two spur gears 204 symmetrically arranged on one side of the support rod 207. The two spur gears 204 are respectively located above the first moving plate 9 and the second moving plate 11. Two spur gear rings 205 are symmetrically rotatably sleeved on the outer wall of the support rod 207. The two spur gear rings 205 are respectively meshed with the two spur gears 204. The two spur gear rings 205 are located between the left arm 202 and the right arm 2010. The two spur gear rings 205 are respectively fixedly connected to the left arm 202 and the right arm 2010. The inner walls of the two spur gear rings 205 are integrally formed. There is a connecting ring, and a limiting groove for the connecting ring to rotate is opened at the position where the supporting rotating rod 207 connects with the connecting ring. Two drive motors 206 are symmetrically arranged on one side of the supporting rotating rod 207. The two drive motors 206 are fixedly connected to the first moving plate 9 and the second moving plate 11 respectively. Two spur gears 204 are driven by the output ends of the two drive motors 206 respectively. Through the cooperation of the spur gears 204, the spur ring 205 and the drive motors 206, the left arm 202 and the right arm 2010 can be driven to perform individual reciprocating flipping or synchronous reciprocating flipping operation.

[0057] The above embodiments disclose an external winding and unwinding structure. In use, the fixed cylinder 12 is activated to drive the second fixed plate 10 to move in the direction of a winding traction roller 4. At this time, the first moving plate 9 and the second moving plate 11, driven by the second fixed plate 10, slide along the outer walls of the first guide rail and the second guide rail respectively through the first slide table and the second slide table until the air shaft 6 contacts the outer wall of a winding traction roller 4.

[0058] Then, the winding motor 2011 is started to drive the second synchronous pulley to rotate. At the same time, the first synchronous pulley drives the third synchronous pulley to rotate through the first transmission belt driven by the second synchronous pulley. At this time, the fourth synchronous pulley drives the transmission slide rod 2014 to rotate through the limit slider through the second transmission belt driven by the third synchronous pulley. At the same time, the transmission slide rod 2014 drives the air shaft 6 to rotate synchronously through the coupling 2012. In this way, the paper cut by the slitting component 3 can be wound up.

[0059] During this process, based on the diameter of the paper roll, the control terminal controls the fixed cylinder 12 to push the second fixed plate 10 to slowly reset, thereby ensuring that the outer wall of the paper roll is always in contact with the outer wall of the roll-up traction roller 4. At the same time, the control terminal controls the speed of the roll-up motor 2011, thereby ensuring the stability of the paper roll-up tension through the speed difference between the air shaft 6 and the roll-up traction roller 4.

[0060] When the paper is wound to the finished diameter, the winding motor 2011 is stopped, and the support cylinder 2013 is started to drive the active end to move through the transmission slide rod 2014. At this time, the elastic element is separated from the driven end under the drive of the active end, and the transmission slide rod 2014 slides along the inner wall of the fourth synchronous wheel, thereby releasing the movement lock of the air shaft 6 end shaft.

[0061] Then, the two drive motors 206 are started to drive the two spur gears 204 to rotate. At this time, the two spur gear rings 205 rotate along the outer wall of the support rod 207 through the connecting ring under the meshing drive of the two spur gears 204. At the same time, the left arm 202 and the right arm 2010 rotate along the outer wall of the support rod 207 under the drive of the two spur gear rings 205. At this time, the positioning cylinder 201 is separated from the left wall plate 203 under the drive of the left arm 202. At the same time, the air shaft 6 is driven by the docking block and the right arm 2010 to move the rolled paper to one side of the first base plate 1. At this time, the paper is supported by the handling device such as a handcart or pallet. Then, the two drive motors 206 are stopped and the positioning cylinder 201 is started to drive the docking block to separate from the air shaft 6, thereby releasing the fixed connection between the air shaft 6 and the positioning cylinder 201.

[0062] Then, a drive motor 206 is started to drive a spur gear 204 to rotate. At this time, a spur gear ring 205, driven by the meshing of a spur gear 204, drives the left arm 202 to rotate and reset along the outer wall of the support rod 207. At the same time, the positioning cylinder 201 is moved synchronously under the drive of the left arm 202 until the positioning cylinder 201 contacts the inner wall of the positioning slide. Then, the air shaft 6 is started to retract, so that the paper can be fed.

[0063] When the paper feeding is completed, another drive motor 206 is started to drive another spur gear 204 to rotate. At the same time, another spur gear ring 205, driven by the other spur gear 204, drives the right arm 2010 to flip and reset. At this time, the air shaft 6 moves and resets under the drive of the right arm 2010, and drives the driven end to move into the support seat 209. Then, the positioning cylinder 201 and the support cylinder 2013 are started to reverse the above operation, which can automatically lock the end shaft of the air shaft 6. Then, the above operation is repeated to continue the winding operation of the cut paper.

[0064] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An external winding and unwinding structure, comprising a first base plate (1), a second base plate (7) provided at one end of the first base plate (1), two first fixing plates (8) symmetrically fixedly connected to one end of the first base plate (1), the two first fixing plates (8) being located between the first base plate (1) and the second base plate (7), both first fixing plates (8) being fixedly connected to the second base plate (7), a support frame (5) fixedly connected to one side of the first base plate (1), the support frame (5) being fixedly connected to the second base plate (7), a first movable plate (9) provided above the first base plate (1), a second movable plate (11) provided above the second base plate (7), a second fixing plate (10) fixedly connected to the top of the first movable plate (9), the second fixing plate (10) being located at the top of the second movable plate (11), the second fixing plate (10) being fixedly connected to the second movable plate (11), and an air expansion shaft (6) provided above the second fixing plate (10), characterized in that, The first movable plate (9) is provided with a feeding mechanism for convenient paper feeding; The feeding mechanism includes: a left wall plate (203) fixedly connected to the top of the first moving plate (9); a support base (209) installed at the top of the second moving plate (11); a right wall plate (208) provided at one end of the support base (209); the right wall plate (208) fixedly connected to the second moving plate (11); the air shaft (6) and the second fixed plate (10) are both located between the left wall plate (203) and the right wall plate (208); and a sliding groove for the end shaft to move is provided at the position where the support base (209) connects with the end shaft of the air shaft (6).

2. The external winding and unwinding structure according to claim 1, characterized in that, The feeding mechanism also includes a flipping component disposed on the support base (209); The flipping assembly includes: a support rotating rod (207) fixedly connected to one end of the support base (209); the left wall panel (203) and the right wall panel (208) are both fixedly connected to the outer wall of the support rotating rod (207); the outer wall of the support rotating rod (207) is symmetrically rotatably sleeved with a left arm (202) and a right arm (2010); the left arm (202) and the right arm (2010) are located between the left wall panel (203) and the right wall panel (208); the left arm (202) is located at the end of the air shaft (6) away from the right wall panel (208); and the right arm (2010) is rotatably sleeved on the outer wall of the air shaft (6). The left arm (202) is provided with a first limiting component for supporting and limiting the air shaft (6); The support base (209) is provided with a second limiting component for supporting and limiting the air shaft (6); The support rod (207) is provided with a first drive assembly for driving the left arm (202) and right arm (2010) to rotate independently.

3. The external winding and unwinding structure according to claim 2, characterized in that, The first limiting component includes a positioning cylinder (201) installed on the left arm (202) away from the air shaft (6). A positioning groove for the positioning cylinder (201) to slide is provided at the position where the left wall plate (203) connects with the positioning cylinder (201). A docking block is rotatably connected to the output end of the positioning cylinder (201). The docking block is located at the end of the left arm (202) away from the positioning cylinder (201). The air shaft (6) is slidably sleeved on the outer wall of the docking block.

4. The external winding and unwinding structure according to claim 2, characterized in that, The second limiting component includes a coupling (2012) disposed inside the support base (209). The coupling (2012) includes an active end, a driven end, and an elastic element. The elastic element is located between the active end and the driven end. The elastic element is fixedly connected to the active end by bolts. One end of the driven end is circumferentially formed with multiple tooth blocks at equal intervals. The position where the elastic element contacts the tooth blocks is provided with a tooth groove that matches the outer wall of the tooth blocks. The driven end is fixedly connected to the end shaft of the air shaft (6). A support cylinder (2013) is installed inside the support base (209). A fixed push plate is fixedly connected to the output end of the support cylinder (2013). The fixed push plate is rotatably sleeved on the outer wall of the transmission slide rod (2014). The active end is located at the end of the transmission slide rod (2014) away from the support cylinder (2013). The active end is fixedly connected to the transmission slide rod (2014). The support base (209) is provided with a second drive component.

5. The external winding and unwinding structure according to claim 4, characterized in that, The second drive assembly includes: a first synchronous wheel rotatably connected inside the support base (209), a first transmission belt sleeved on the outer wall of the first synchronous wheel, a second synchronous wheel sleeved on the side of the first transmission belt away from the first synchronous wheel, a third synchronous wheel fixedly connected to the end of the first synchronous wheel away from the right wall plate (208), a second transmission belt sleeved on the outer wall of the third synchronous wheel, a fourth synchronous wheel sleeved on the side of the second transmission belt away from the third synchronous wheel, the fourth synchronous wheel slidably sleeved on the outer wall of the transmission slide rod (2014), a limit slider fixedly connected to the inner wall of the fourth synchronous wheel, a guide groove for the limit slider to slide at the position where the transmission slide rod (2014) and the limit slider are connected, and the second synchronous wheel is driven by the output end of the winding motor (2011).

6. The external winding and unwinding structure according to claim 2, characterized in that, The first driving assembly includes two spur gears (204) symmetrically arranged on one side of the supporting rotating rod (207). The two spur gears (204) are respectively located above the first moving plate (9) and the second moving plate (11). Two spur gear rings (205) are symmetrically rotatably sleeved on the outer wall of the supporting rotating rod (207). The two spur gear rings (205) are respectively meshed with the two spur gears (204). The two spur gear rings (205) are located between the left arm (202) and the right arm (2010). The two spur gear rings (205) are respectively The two spur gear rings (205) are fixedly connected to the left arm (202) and the right arm (2010). The inner walls of the two spur gear rings (205) are integrally formed with connecting rotating rings. The supporting rotating rod (207) is provided with a limiting rotating groove at the position where it connects with the connecting rotating ring. Two drive motors (206) are symmetrically arranged on one side of the supporting rotating rod (207). The two drive motors (206) are fixedly connected to the first moving plate (9) and the second moving plate (11) respectively. The two spur gears (204) are driven by the output ends of the two drive motors (206) respectively.

7. The external winding and unwinding structure according to claim 1, characterized in that, A slitting assembly (3) is installed on the inner side of the support frame (5). Two winding traction rollers (4) are symmetrically arranged below the slitting assembly (3). Both winding traction rollers (4) are rotatably connected to the support frame (5). Two fixed cylinders (12) are symmetrically installed at the bottom of the inner wall of the support frame (5). Both fixed cylinders (12) are located below the two winding traction rollers (4). An inner winding assembly (13) is provided on the inner side of the support frame (5). Both fixed cylinders (12) are located between the first base plate (1) and the inner winding assembly (13). Another second fixed plate (10) is provided on the inner winding assembly (13). The output ends of the two fixed cylinders (12) are fixedly connected to the two second fixed plates (10) respectively.

8. The external winding and unwinding structure according to claim 1, characterized in that, The top of the first base plate (1) is symmetrically fixedly connected to two first guide rails, and the bottom of the first movable plate (9) is symmetrically fixedly connected to two first slides. The two first slides are respectively slidably sleeved on the outer walls of the two first guide rails.

9. The external winding and unwinding structure according to claim 8, characterized in that, The top of the second base plate (7) is symmetrically fixedly connected to two second guide rails, and the bottom of the second movable plate (11) is symmetrically fixedly connected to two second slides. The two second slides are respectively slidably sleeved on the outer walls of the two second guide rails.

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