Hovercraft apron adhesive tape shearing device

Abstract

The utility model discloses a hovercraft apron adhesive tape shearing device, which relates to the technical field of shearing equipment and comprises a first support frame, a second support frame, an unwinding chassis, a third support frame and a fourth support frame, the second support frame is fixed at the top of the first support frame, and the unwinding chassis is arranged on one side of the first support frame along the width direction of the first support frame. The third supporting frame is slidably connected to the top of the unwinding chassis, and a first driving mechanism is arranged at the top of the first supporting frame; according to the utility model, the diameter of an adhesive tape roll on the unwinding roller is monitored in real time through the infrared sensor I, and proper damping torque is output according to the actual yield, so that constant tension of the adhesive tape in the unwinding process is ensured, and the adhesive tape is prevented from galloping due to too large tension or loosening due to too small tension; the automatic output braking torque is matched with the braking mechanism to enable the unwinding roller to stop rotating instantly, the adhesive tape is prevented from continuously moving due to inertia, constant tension is guaranteed, and meanwhile waste of the adhesive tape and abrasion of equipment are reduced.

Description

Technical Field

[0001] This utility model relates to the field of shearing equipment technology, specifically a shearing device for the apron fabric of a hovercraft. Background Technology

[0002] Hovercraft apron tape is a high-performance synthetic material mainly used in the apron section of hovercraft to provide sealing and buoyancy. This tape is usually made of multi-layer composite materials, including reinforcing layers, adhesive layers, and wear-resistant layers, and has properties such as high strength, wear resistance, and aging resistance. During the operation of hovercraft, the apron tape needs to withstand huge water pressure and friction, so it is required to have excellent mechanical properties and chemical stability.

[0003] The existing cutting devices for the apron tape of hovercraft have the following shortcomings in actual use: it is difficult to ensure constant tension during unwinding; in addition, when the equipment stops, the tape often continues to move due to inertia, resulting in uncontrolled tension and tape waste; secondly, the tape may deviate from the center position during transportation, which will lead to cutting errors and waste.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a device for cutting the adhesive tape of a hovercraft apron, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a hovercraft apron tape cutting device, including a support frame 1, a support frame 2, a roll-up base, a support frame 3, and a support frame 4. The support frame 2 is fixed to the top of the support frame 1. The roll-up base is disposed on one side of the support frame 1 along the width direction of the support frame 1. The support frame 3 is slidably connected to the top of the roll-up base. The support frame 1 is provided with a drive mechanism 1 at its top. The support frame 3 is provided with a drive mechanism 2 at its top. The drive mechanism 1 includes a reduction motor fixed to one end of the support frame 1 along the length direction of the support frame 1 at its top. A sprocket assembly 1 is installed at the output end of the reduction motor. The drive mechanism 2 includes a drive motor fixed to one end of the support frame 3 along the length direction of the support frame 3 at its top.

[0007] The output end of the drive motor is parallel to the width direction of the support frame 1. A bevel gear reducer is fixed to the output end of the drive motor. A sprocket set 2 is installed on the side wall of the bevel gear reducer near the inside of the support frame 3. Support frames 4 are installed at both ends of the top of the support frame 3 along its length direction. A braking mechanism is installed on the top of the support frame 4 near the drive motor. Gear 1 is coaxially fixed on the side wall of the braking mechanism near the inside of the support frame 3. Gear 2 is meshed on the top of gear 1. An air shaft is fixed on the side wall of gear 2 away from the braking mechanism. An unwinding roller is fixed in the middle of the outer arc wall of the air shaft. Bearing brackets are rotatably connected to both ends of the outer arc wall of the air shaft. The bearing brackets are fixed to the top of the support frame 4.

[0008] The braking mechanism includes a brake, which is located on the top of the support frame four and fixed to the end of the air expansion shaft. A brake disc is fixed on the side wall of the brake near the unwinding roller. The brake disc is coaxial with the air expansion shaft. A brake cylinder is provided on one side of the brake disc along the width direction of the support frame three and is fixed to the top of the support frame four. An infrared sensor one is fixed on the top of the support frame four on the side away from the drive motor. The infrared sensor one is positioned facing the center of the side wall of the unwinding roller. Infrared sensors two are installed at both ends of the top of the unwinding chassis along its length direction. The infrared sensors two are positioned facing the end of the outer arc wall of the unwinding roller. Linear guide rails are installed at the four corners of the top of the unwinding chassis. The movement direction of the linear guide rails is consistent with the length direction of the unwinding chassis. The support frame three is fixed to the top of the four linear guide rails.

[0009] Furthermore, a drag roller is horizontally provided on the side of the top of the support frame two away from the unwinding chassis. The length direction of the drag roller is parallel to the length direction of the support frame two. Both ends of the drag roller along its axial direction are rotatably connected to a support plate one. The support plate one is fixed to the top of the support frame two. The end of the drag roller near the reduction motor passes through the support plate one and is fixed to the sprocket assembly one. A slide table one is fixed on the top of the support frame two on the side of the drag roller near the unwinding chassis. A cloth-pulling active roller is provided on the side of the slide table one away from the drag roller. A slide table two is provided on the side of the cloth-pulling active roller away from the slide table one. The length directions of the cloth-pulling active roller, slide table one, and slide table two are all parallel to the length direction of the drag roller. Both ends of the cloth-pulling active roller along its axial direction are rotatably connected to a support plate two. The support plate two is fixed to the top of the support frame two. The end of the cloth-pulling active roller near the reduction motor passes through the support plate two and is fixed to the sprocket assembly one.

[0010] Furthermore, a cutting mechanism one slides on the first slide table. The cutting mechanism one includes a fixed plate fixed to the first slide table. A cylinder is fixed to the side wall of the fixed plate away from the first slide table. A bracket is fixed to the output end of the cylinder. A cutting machine one is fixed to the end of the bracket away from the cylinder. The cutting direction of the cutting machine one is consistent with the length direction of the support frame one. A cutting mechanism two slides on the second slide table. The structure of the cutting mechanism two is the same as that of the cutting mechanism one. The cutting direction of the cutting mechanism two is consistent with the width direction of the support frame one. A sprocket is fixed to the output end of the reduction motor. Group 1 includes a sprocket 1 fixed to the output end of the geared motor, a chain 1 meshing on the outer side of the sprocket 1, a sprocket 2 meshing on the inner side of the chain 1 away from the sprocket 1, the sprocket 2 being coaxially fixed to the end of the fabric-pulling drive roller that passes through the support plate 2, and a sprocket 3 being coaxially fixed on the output end of the geared motor on the side of the sprocket 1 away from the geared motor, a chain 2 meshing on the outer side of the sprocket 3, a sprocket 4 meshing on the inner side of the chain 2 away from the sprocket 3, and a sprocket 4 being coaxially fixed to the end of the fabric-pulling roller that passes through the support plate 1.

[0011] Furthermore, the sprocket assembly two fixed to the side wall of the bevel gear reducer near the interior of the support frame three includes a sprocket five fixed to the output end of the bevel gear reducer, a chain three meshing with the outer side of the sprocket five, a sprocket six meshing with the inner side of the chain three away from the sprocket five, a support plate three rotatably connected to the side of the sprocket six near the support frame three, the support plate three fixed to the bottom of the support frame three, a sprocket seven coaxially fixed to the side of the sprocket five away from the bevel gear reducer, a chain four meshing with the outer side of the sprocket seven, a sprocket eight meshing with the inner side of the chain four away from the sprocket seven, and a sprocket eight coaxially fixed to the side of the gear one away from the braking mechanism.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The diameter of the rubber roll on the unwinding roller is monitored in real time by an infrared sensor, and an appropriate damping torque is output according to the actual output to ensure that the rubber roll maintains a constant tension during the unwinding process. This prevents the roll from flying off due to excessive tension or the rubber roll from loosening due to insufficient tension. When the equipment stops, the automatic output of braking torque works with the braking mechanism to stop the unwinding roller instantly, preventing the rubber roll from continuing to move due to inertia, ensuring constant tension, and reducing waste of rubber roll and wear on the equipment.

[0014] 2. By using an infrared sensor in conjunction with the photoelectric effect to monitor the distance error between the edge of the adhesive tape and the measuring point in real time, the linear guide rail is controlled to adjust the horizontal movement of the unwinding roller, ensuring that the adhesive tape remains centered during the unwinding process, thereby improving product quality and production efficiency. Attached Figure Description

[0015] Figure 1 A side view schematic diagram of the overall structure of a hovercraft apron tape cutting device.

[0016] Figure 2 A schematic diagram of the overall structure of a hovercraft apron tape cutting device from a frontal view.

[0017] Figure 3 This is a schematic diagram of the drive mechanism 2 in a hovercraft apron tape cutting device.

[0018] Figure 4 This is a schematic diagram of a partial structure of a hovercraft apron tape cutting device.

[0019] In the picture:

[0020] 10. Support frame one; 11. Support frame two; 12. Unwinding base; 13. Support frame three; 14. Support frame four;

[0021] 20. Gear motor; 21. Sprocket 1; 22. Sprocket 2; 23. Chain 1; 24. Sprocket 3; 25. Sprocket 4; 26. Chain 2; 27. Fabric pulling drive roller; 28. Fabric dragging roller;

[0022] 30. Slide table one; 31. Cutting mechanism one; 32. Slide table two; 33. Cutting mechanism two;

[0023] 40. Drive motor; 41. Bevel gear reducer; 42. Sprocket five; 43. Sprocket six;

[0024] 44. Chain 3; 45. Sprocket 7; 46. Sprocket 8; 47. Chain 4; 48. Gear 1;

[0025] 49. Gear Two;

[0026] 50. Braking mechanism; 51. Air shaft; 52. Unwinding roller. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see the appendix Figure 1 To be continued Figure 4The present invention provides a device for cutting the apron tape of a hovercraft: including a support frame 10, a support frame 21, a roll-up base 12, a support frame 313, and a support frame 414. The support frame 21 is fixed to the top of the support frame 10. The roll-up base 12 is disposed on one side of the support frame 10 along the width direction of the support frame 10. The support frame 313 is slidably connected to the top of the roll-up base 12. The support frame 10 is provided with a drive mechanism 1 at the top, and the support frame 313 is provided with a drive mechanism 2 at the top. The drive mechanism 1 includes a reduction motor 20 fixed to one end of the support frame 10 along the length direction of the support frame 10 at the top. A sprocket set 1 is installed at the output end of the reduction motor 20. The drive mechanism 2 includes a drive motor 40 fixed to one end of the support frame 313 along the length direction of the support frame 313 at the top.

[0029] The output end of the drive motor 40 is parallel to the width direction of the support frame 10. A bevel gear reducer 41 is fixed to the output end of the drive motor 40. A sprocket set 2 is installed on the side wall of the bevel gear reducer 41 near the inside of the support frame 3 13. Support frames 4 14 are installed at both ends of the top of the support frame 3 13 along its length direction. A braking mechanism 50 is installed on the top of the support frame 4 14 near the drive motor 40. A gear 1 48 is coaxially fixed on the side wall of the braking mechanism 50 near the inside of the support frame 3 13. A gear 2 49 is meshed on the top of the gear 1 48. An air shaft 51 is fixed on the side wall of the gear 2 49 away from the braking mechanism 50. A unwinding roller 52 is fixed in the middle of the outer arc wall of the air shaft 51. Bearing brackets are rotatably connected to both ends of the outer arc wall of the air shaft 51. The bearing brackets are fixed to the top of the support frame 4 14.

[0030] An infrared sensor is fixed to the top of the support frame four 14 on the side away from the drive motor 40. The infrared sensor is positioned facing the center of the side wall of the unwinding roller 52. Infrared sensors two are installed at both ends of the top of the unwinding base 12 along its length direction. The infrared sensors two are positioned facing the end of the outer arc wall of the unwinding roller 52. Linear guide rails are installed at the four corners of the top of the unwinding base 12. The movement direction of the linear guide rails is consistent with the length direction of the unwinding base 12. The support frame three 13 is fixed to the top of the four linear guide rails.

[0031] The braking mechanism 50 includes a brake, which is disposed on the top of the support frame 14 and fixed to the end of the air shaft 51. A brake disc is fixed on the side wall of the brake near the unwinding roller 52. The brake disc is coaxially disposed with the air shaft 51. A brake cylinder is provided on one side of the brake disc along the width direction of the support frame 13 and the brake cylinder is fixed to the top of the support frame 14.

[0032] It should be noted that: it is understandable that support frame 10, support frame 21, support frame 313 and support frame 414 are all hollow three-dimensional frames. The reduction motor 20 drives the sprocket group 1, which in turn drives sprocket 22 and sprocket 425 to rotate. Sprocket 22 drives the active cloth-pulling roller 27 to actively pull the adhesive cloth. The cloth-pulling roller 28 and the slide table 30 are provided with a pressure strip on the side that are close to each other. The length direction of the pressure strip is consistent with the length direction of support frame 10. Vertical support rods slide at both ends of the pressure strip along its length direction. The support rods are fixed to the top of support frame 21. The pressure strip is used to press down the adhesive cloth at the other end to prevent it from shaking when the cutting mechanism 31 cuts the adhesive cloth.

[0033] Please see the appendix Figure 1 To be continued Figure 4 The present invention provides a technical solution: a drag roller 28 is horizontally provided on the side of the top of the support frame 2 11 away from the unwinding base 12. The length direction of the drag roller 28 is parallel to the length direction of the support frame 2 11. Both ends of the drag roller 28 along its axial direction are rotatably connected to a support plate 1. The support plate 1 is fixed to the top of the support frame 2 11. The end of the drag roller 28 near the reduction motor 20 passes through the support plate 1 and is fixed to the sprocket assembly 1. A slide table 30 is fixed on the top of the support frame 2 11 on the side of the drag roller 28 near the unwinding base 12. A cloth pulling active roller 27 is provided on the side of the slide table 30 away from the drag roller 28.

[0034] A second slide 32 is provided on the side of the active fabric pulling roller 27 away from the first slide 30. The length directions of the active fabric pulling roller 27, the first slide 30 and the second slide 32 are all parallel to the length direction of the dragging roller 28. The two ends of the active fabric pulling roller 27 along its axial direction are rotatably connected to the second support plate. The second support plate is fixed to the top of the second support frame 11. The end of the active fabric pulling roller 27 near the reduction motor 20 passes through the second support plate and is fixed to the first sprocket assembly.

[0035] A cutting mechanism 31 slides on the slide table 30. The cutting mechanism 31 includes a fixed plate fixed on the slide table 30. A cylinder is fixed on the side wall of the fixed plate away from the slide table 30. A bracket is fixed at the output end of the cylinder. A cutting machine is fixed at the end of the bracket away from the cylinder. The cutting direction of the cutting machine is consistent with the length direction of the support frame 10. A cutting mechanism 33 slides on the slide table 32. The structure of the cutting mechanism 33 is the same as that of the cutting mechanism 31. The cutting direction of the cutting mechanism 33 is consistent with the width direction of the support frame 10.

[0036] It should be noted that: the top of the support frame 2 11 is provided with an anvil plate 1 at the cutting motion trajectory of the cutting mechanism 1 31. The length direction of the anvil plate 1 is consistent with the length direction of the support frame 1 10. The top of the support frame 2 11 is provided with an anvil plate 2 at the side of the slide table 2 32 away from the slide table 1 30. The length direction of the anvil plate 2 is consistent with the length direction of the support frame 1 10. The anvil plate 2 is located directly below the cutting mechanism 2 33.

[0037] Another fabric-pulling active roller 27 with the same structure is rotatably installed at the top of the second support plate. This fabric-pulling active roller 27 is not connected to the first sprocket assembly and can slide relative to the height direction of the second support plate. It is fixed by bolts to accommodate films of different thicknesses.

[0038] Please see the appendix Figure 1 To be continued Figure 4 The present invention provides a technical solution: a sprocket assembly fixed to the output end of the reduction motor 20 includes a sprocket 21 fixed to the output end of the reduction motor 20, a chain 23 meshing on the outer side of the sprocket 21, a sprocket 22 meshing on the inner side of the chain 23 away from the sprocket 21, the sprocket 22 being coaxially fixed to the end of the fabric pulling roller 27 passing through the support plate 2, a sprocket 3 24 being coaxially fixed on the output end of the reduction motor 20 on the side of the sprocket 21 away from the reduction motor 20, a chain 26 meshing on the outer side of the sprocket 3 24, a sprocket 4 25 meshing on the inner side of the chain 26 away from the sprocket 3 24, and the sprocket 4 25 being coaxially fixed to the end of the fabric pulling roller 28 passing through the support plate 1;

[0039] The second sprocket assembly fixed to the side wall of the bevel gear reducer 41 near the inside of the support frame 13 includes a sprocket 5 42 fixed to the output end of the bevel gear reducer 41, a chain 3 44 meshing with the outer side of the sprocket 5 42, a sprocket 6 43 meshing with the inner side of the chain 3 44 away from the sprocket 5 42, and a support plate 3 rotatably connected to the side of the sprocket 6 43 near the support frame 13, and the support plate 3 is fixed to the bottom of the support frame 13.

[0040] On the side of sprocket five 42 away from the bevel gear reducer 41, sprocket seven 45 is coaxially fixed. Chain four 47 is meshed with the outer side of sprocket seven 45. On the inner side of chain four 47 away from sprocket seven 45, sprocket eight 46 is meshed with the inner side of chain four 47. Sprocket eight 46 is coaxially fixed with gear one 48 on the side away from the braking mechanism 50.

[0041] It should be noted that the two support plates are coaxially rotatably connected to the same winding roller on one side wall that is close to each other. The winding roller is used to wind up the lining. The air shaft 51 is equipped with chucks at both ends along its axial direction, and magnetic powder brakes are installed on the chuck shafts.

[0042] A photoelectric sensor is provided in the middle of the side of the unwinding chassis 12 and the support frame 3 13 that are close to each other. When the tape is skewed during unwinding, one side will block the photoelectric sensor, thereby changing the reflection path of the light emitted by the photoelectric sensor and changing the time of light reflection. This will control the movement of the linear guide rail on that side to drive the unwinding roller 52 to correct it.

[0043] In one possible embodiment, the photoelectric sensor can be a photoelectric ranging instrument. The infrared sensor calculates the diameter of the unwinding roller 52 in real time based on the current output. Through PID calculation, it outputs a suitable damping torque to the fabric to prevent the fabric roll from flying off due to the traction force being greater than the adhesive force between the tearing film and the lining. When the equipment stops, it can automatically output a braking torque to stop the drive mechanism 1 and drive mechanism 2 instantly to ensure constant tension.

[0044] Working principle:

[0045] Insert the air shaft 51 into the center of the fabric roll and expand it. Manually install it onto the safety chuck. At the beginning, manually tear the film and the lining. Wrap the lining around the take-up shaft. Pass the film through the slide table 2 32, the fabric pulling drive roller 27, the slide table 1 30, and the fabric dragging roller 28 in sequence, and keep it basically in the middle of the equipment with the edge of the fabric inside the photoelectric sensor.

[0046] When operating manually, manually adjust the horizontal height of the fabric-pulling active roller 27. After adjusting the width, start the cutting mechanism 1 31 and the cutting mechanism 2 33, and then lower it. The lowering range should be sufficient to cut the fabric. After manually lowering the fabric-pulling active roller 27, start the traction to allow the fixed-width film to walk out of the pressure strip. Stop the traction, lower the pressure strip to press the fabric, start the cutting mechanism 1 31, and then lower it. The lowering range should be sufficient to cut the fabric. Start the slide table 1 30 to drive the cutting mechanism 1 31 to cut off a section of the film at the head.

[0047] During automatic operation, the fabric-pulling active roller 27 presses down on the film, and at the same time, the traction and lining winding are automatically started to tear the film and lining apart. Simultaneously, the cutting mechanism 31 operates to achieve film width setting. When the traction length reaches the set value, the traction and edge cutting automatically stop, the braking mechanism 50 is activated to prevent the fabric roll from continuing to rotate under inertia, the pressing strip presses down on the film, and the cutting mechanism 31 and the cutting mechanism 33 are respectively driven by the slide table 30 and the slide table 32 to cut the film.

Claims

1. A device for cutting the adhesive tape of a hovercraft apron, comprising a first support frame (10), a second support frame (11), a roll-up base plate (12), a third support frame (13), and a fourth support frame (14), wherein the second support frame (11) is fixed to the top of the first support frame (10), the roll-up base plate (12) is disposed on one side of the first support frame (10) along the width direction of the first support frame (10), and the third support frame (13) is slidably connected to the top of the roll-up base plate (12), characterized in that: The support frame 1 (10) is provided with a drive mechanism 1 at the top, and the support frame 3 (13) is provided with a drive mechanism 2 at the top. The drive mechanism 1 includes a reduction motor (20) fixed to one end of the support frame 1 (10) along the length direction of the support frame 1 (10) at the top. The output end of the reduction motor (20) is equipped with a sprocket set 1. The drive mechanism 2 includes a drive motor (40) fixed to one end of the support frame 3 (13) along the length direction of the support frame 3 (13). The output end of the drive motor (40) is parallel to the width direction of the support frame one (10). A bevel gear reducer (41) is fixed to the output end of the drive motor (40). A sprocket set two is installed on the side wall of the bevel gear reducer (41) near the inside of the support frame three (13). Support frames four (14) are installed at both ends of the top of the support frame three (13) along its length direction. A braking mechanism (50) is installed on the top of the support frame four (14) near the drive motor (40). Gear 1 (48) is coaxially fixed on one side wall of the braking mechanism (50) near the inside of the support frame 3 (13). Gear 2 (49) is meshed with the top of gear 1 (48). Air shaft (51) is fixed on one side wall of gear 2 (49) away from the braking mechanism (50). Unwinding roller (52) is fixed in the middle of the outer arc wall of air shaft (51). Bearing brackets are rotatably connected to both ends of the outer arc wall of air shaft (51). The bearing brackets are fixed to the top of support frame 4 (14).

2. The air-cushion boat apron tape cutting device as described in claim 1, characterized in that: An infrared sensor is fixed to the top of the support frame four (14) on the side away from the drive motor (40). The infrared sensor is positioned facing the center of the side wall of the unwinding roller (52). Infrared sensors two are installed at both ends of the top of the unwinding chassis (12) along its length direction. The infrared sensors two are positioned facing the end of the outer arc wall of the unwinding roller (52). Linear guide rails are installed at the four corners of the top of the unwinding chassis (12). The movement direction of the linear guide rails is consistent with the length direction of the unwinding chassis (12). The support frame three (13) is fixed to the top of the four linear guide rails.

3. The air-cushion boat apron tape cutting device as described in claim 1, characterized in that: The top of the support frame 2 (11) is horizontally provided with a drag roller (28) on the side away from the unwinding chassis (12). The length direction of the drag roller (28) is parallel to the length direction of the support frame 2 (11). Both ends of the drag roller (28) along its axial direction are rotatably connected to a support plate 1. The support plate 1 is fixed to the top of the support frame 2 (11). The end of the drag roller (28) near the reduction motor (20) passes through the support plate 1 and is fixed to the sprocket assembly 1. The top of the support frame 2 (11) is fixed with a slide table 1 (30) on the side of the drag roller (28) near the unwinding chassis (12). The side of the slide table 1 (30) away from the drag roller (28) is provided with a cloth pulling active roller (27). The side of the cloth pulling active roller (27) away from the slide table 1 (30) is provided with a slide table 2 (32). The length directions of the cloth pulling active roller (27), slide table 1 (30) and slide table 2 (32) are all parallel to the length direction of the drag roller (28).

4. The hovercraft apron tape cutting device as described in claim 3, characterized in that: The active fabric-pulling roller (27) is rotatably connected to two support plates at both ends along its axial direction. The support plates are fixed to the top of the support frame (11). The end of the active fabric-pulling roller (27) near the reduction motor (20) passes through the support plate and is fixed to the sprocket assembly. A cutting mechanism (31) slides on the slide table (30). The cutting mechanism (31) includes a fixed plate fixed on the slide table (30). A cylinder is fixed on the side wall of the fixed plate away from the slide table (30). A bracket is fixed at the output end of the cylinder. A cutting machine is fixed at the end of the bracket away from the cylinder. The cutting direction of the cutting machine is consistent with the length direction of the support frame (10). A cutting mechanism (33) slides on the slide table (32). The structure of the cutting mechanism (33) is consistent with that of the cutting mechanism (31). The cutting direction of the cutting mechanism (33) is consistent with the width direction of the support frame (10).

5. The air-cushion boat apron tape cutting device as described in claim 1, characterized in that: The first sprocket assembly fixed to the output end of the geared motor (20) includes a first sprocket (21) fixed to the output end of the geared motor (20), a first chain (23) meshing on the outer side of the first sprocket (21), a second sprocket (22) meshing on the inner side of the first chain (23) away from the first sprocket (21), the second sprocket (22) being coaxially fixed to the end of the cloth-pulling active roller (27) passing through the support plate 2, a third sprocket (24) being coaxially fixed on the output end of the geared motor (20) on the side of the first sprocket (21) away from the geared motor (20), a second chain (26) meshing on the outer side of the third sprocket (24), a fourth sprocket (25) meshing on the inner side of the second chain (26) away from the third sprocket (24), and the fourth sprocket (25) being coaxially fixed to the end of the dragging roller (28) passing through the support plate 1.

6. The air-cushion boat apron tape cutting device as described in claim 1, characterized in that: The second sprocket assembly fixed to the side wall of the bevel gear reducer (41) near the support frame three (13) includes a sprocket five (42) fixed to the output end of the bevel gear reducer (41), a chain three (44) meshing with the outer side of the sprocket five (42), a sprocket six (43) meshing with the inner side of the chain three (44) away from the sprocket five (42), and a support plate three rotatably connected to the side of the sprocket six (43) near the support frame three (13), and the support plate three is fixed to the bottom of the support frame three (13).

7. The hovercraft apron tape cutting device as described in claim 6, characterized in that: On the side of the sprocket five (42) away from the bevel gear reducer (41), sprocket seven (45) is coaxially fixed. Chain four (47) is meshed on the outer side of sprocket seven (45). Chain eight (46) is meshed on the inner side of chain four (47) away from sprocket seven (45). Sprocket eight (46) is coaxially fixed on the side of gear one (48) away from the braking mechanism (50).

8. The air-cushion boat apron tape cutting device as described in claim 1, characterized in that: The braking mechanism (50) includes a brake, which is located on the top of the support frame four (14). The brake is fixed to the end of the air shaft (51). A brake disc is fixed on the side wall of the brake near the unwinding roller (52). The brake disc is coaxially arranged with the air shaft (51). A brake cylinder is provided on one side of the brake disc along the width direction of the support frame three (13). The brake cylinder is fixed to the top of the support frame four (14).

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