A smart slitting device for nonwoven fabric processing

CN224619280UActive Publication Date: 2026-08-11JIANGSU HAIYUNSUO TEXTILE TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-26
Publication Date
2026-08-11

AI Technical Summary

Technical Problem

[0004]本实用新型的目的在于提供一种无纺布加工用智能分卷装置,通过设置调节部,解决了现有的分卷装置在使用过程中,不便于对分卷的数量和宽幅进行调节,导致装置难以灵活地适配不同需求和种类的无纺布,从而严重降低了装置的实用性的问题

Benefits of technology

[0013] 1. By setting an adjustment section, during adjustment, the connecting ring is pushed into the outer wall of the support roller and moved to the corresponding groove. The protrusion is locked into the groove under the action of spring one to complete the fixation. The blade ring is sleeved on the outer wall of the connecting ring, and the locking block is locked in the limiting groove under the action of spring two to fix the blade one. The winding paper wheel and the output paper wheel are similarly installed on the corresponding connecting ring to achieve the positioning and fixation of each component. The number and position of the connecting ring, output paper wheel, blade ring and winding paper wheel can be adjusted to adjust the number and width of the rolls. This not only ensures the stability of the position of each component during the roll-up process and ensures the smooth progress of the roll-up operation, but also adapts to the roll-up requirements of various specifications of non-woven fabrics, thereby improving the practicality of the device.

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Abstract

This utility model discloses an intelligent slitting device for nonwoven fabric processing, relating to the field of nonwoven fabric processing technology. The utility model includes a support frame, and further includes: an auxiliary part mounted on the support frame; an adjustment part located on the support frame; and a cutting part disposed on the support frame. The adjustment part includes a snap-fit ​​assembly disposed on the support frame; and a limiting assembly located inside the support frame. The snap-fit ​​assembly includes several rotating shafts rotatably connected to the inner wall of the support frame, with support rollers fixedly connected to the outer walls of each shaft, and several grooves formed on the inner walls of each support roller. By incorporating the adjustment part, this utility model solves the problem of existing slitting devices being inconvenient to adjust the number and width of slitting during use, making it difficult for the device to flexibly adapt to different needs and types of nonwoven fabrics, thus severely reducing the device's practicality.
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Description

Technical Field

[0001] This utility model belongs to the field of nonwoven fabric processing technology, and in particular relates to an intelligent slitting device for nonwoven fabric processing. Background Technology

[0002] Nonwoven fabric, as a type of non-woven material, is made from polypropylene and other raw materials through processes such as spinning, web laying, and thermal rolling. Due to its breathability, flexibility, and environmental friendliness, it is widely used in industries such as medical care, hygiene, and packaging. In the large-scale production of nonwoven fabric, the finished products are mostly in the form of wide, continuous large rolls, which cannot directly meet the needs of downstream enterprises for different widths and lengths. It is necessary to cut and rewind the fabric through the processing stage. The nonwoven fabric slitting and rewinding device is a key piece of equipment. It can cut wide nonwoven fabric into specified widths and simultaneously complete the rewinding operation, realize standardized roll production, connect the production and application stages, and improve the adaptability and production efficiency of nonwoven fabric products.

[0003] However, existing slitting devices are not convenient for adjusting the number and width of slitting during use, making it difficult for the device to flexibly adapt to different needs and types of nonwoven fabrics, thus seriously reducing the practicality of the device. Utility Model Content

[0004] The purpose of this utility model is to provide an intelligent slitting device for nonwoven fabric processing. By setting an adjustment part, it solves the problem that existing slitting devices are not convenient to adjust the number and width of the slitting during use, which makes it difficult for the device to flexibly adapt to different needs and types of nonwoven fabrics, thus seriously reducing the practicality of the device.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to an intelligent slitting device for nonwoven fabric processing, comprising a support frame, an auxiliary part mounted on the support frame, an adjustment part located on the support frame, and a cutting part disposed on the support frame. The adjustment part includes a snap-fit ​​assembly disposed on the support frame and a limiting assembly located inside the support frame. The snap-fit ​​assembly includes several rotating shafts rotatably connected to the inner wall of the support frame. Each of the rotating shafts has a support roller fixedly connected to its outer wall. Each of the support rollers has several grooves on its inner wall and several connecting rings on its outer wall. Each connecting ring has an elastic element inside it, which is used to limit the position of the connecting rings. Each elastic element includes a spring fixedly connected to the inner wall of the connecting ring. A protrusion is slidably connected to the inner wall of the connecting ring. The bottom of the spring is fixedly connected to the protrusion, and the spring and the protrusion are adapted to each other. By utilizing the cooperation of the spring and the protrusion, the connecting ring is quickly fixed at the designated position of the support roller.

[0007] Furthermore, the auxiliary part includes a motor fixedly connected to the rear side of the bracket one. The output shaft of the motor is fixedly connected to the rotating shaft on the left side via a coupling. Two brackets two are fixedly connected to the inner wall of the bracket one. Several guide rollers are rotatably connected to the inner walls of the two brackets two. A sealing member is provided on the front side of the bracket one. The sealing member is used to support the rotation of several rotating shafts. The sealing member includes a bracket three provided on the front side of the bracket one. Several collars are fixedly connected to the inner wall of the bracket three. The several collars are respectively adapted to the several rotating shafts. Two bolts are provided on the inner wall of the bracket three. Two threaded holes are opened on the front side of the bracket one. The two bolts are respectively adapted to the two threaded holes.

[0008] Furthermore, the cutting section includes a fixing component disposed on the left side of the two supports; and a dividing component disposed on the support. The fixing component is used to fix the nonwoven fabric, while the dividing component is used to cut the nonwoven fabric.

[0009] Furthermore, the limiting assembly includes a paper feed roller disposed on several connecting rings on the right side, a blade ring fitted on the outer wall of several connecting rings located above, several limiting grooves formed on the inner wall of several blade rings, and a blade fixedly connected to the outer wall of several blade rings. A paper take-up roller is fitted on the outer wall of several connecting rings located on the left side, and limiting components are provided in several limiting grooves. The limiting components are used to ensure the positions of the paper feed roller, the blade, and the paper take-up roller. The limiting components include a locking block slidably connected to the inner wall of the connecting ring. A spring is fixedly connected to the side of the locking block near the support roller, and the side of the spring away from the locking block is fixedly connected to the connecting ring. Several locking blocks located above are respectively adapted to several limiting grooves. Through the action of the springs and locking blocks, the blade ring, the paper take-up roller, and the paper feed roller are securely locked on the connecting rings to prevent them from shifting during operation.

[0010] Furthermore, the fixing component includes an electric telescopic rod fixedly connected to the inner wall of the bottom of the bracket. A fixing block is fixedly connected to the top of the electric telescopic rod. The rear side of the fixing block is slidably connected to the bracket. A fixing block is fixedly connected to the bracket. A receiving groove is formed on the top of the fixing block. A receiving groove is formed on the inner wall of the fixing block. The receiving groove penetrates the fixing block. Both the receiving groove and the receiving groove are vertically arranged and their trajectories coincide. The non-woven fabric is pressed and fixed before cutting to ensure stability and accuracy during cutting.

[0011] Furthermore, the dividing component includes a slider that is slidably connected to the inner wall of the fixed block two. A handle is fixedly connected to the top of the slider, and a blade two is fixedly connected to the bottom of the slider. The bottom of the blade two extends outside the receiving groove two. By manually driving the blade, the cutting action of the fixed nonwoven fabric is performed.

[0012] This utility model has the following beneficial effects:

[0013] 1. By setting an adjustment section, during adjustment, the connecting ring is pushed into the outer wall of the support roller and moved to the corresponding groove. The protrusion is locked into the groove under the action of spring one to complete the fixation. The blade ring is sleeved on the outer wall of the connecting ring, and the locking block is locked in the limiting groove under the action of spring two to fix the blade one. The winding paper wheel and the output paper wheel are similarly installed on the corresponding connecting ring to achieve the positioning and fixation of each component. The number and position of the connecting ring, output paper wheel, blade ring and winding paper wheel can be adjusted to adjust the number and width of the rolls. This not only ensures the stability of the position of each component during the roll-up process and ensures the smooth progress of the roll-up operation, but also adapts to the roll-up requirements of various specifications of non-woven fabrics, thereby improving the practicality of the device.

[0014] 2. By setting up a cutting section, after the nonwoven fabric is rolled up, the electric telescopic rod is activated to drive the first fixing block to rise and cooperate with the second fixing block to fix the nonwoven fabric. By pulling the slider with the handle, the second blade passes through the receiving groove first and receiving groove second to cut the nonwoven fabric and complete the cutting operation. The nonwoven fabric can be fixed by the fixing component and cut by the dividing component, which can avoid cutting displacement, quickly complete the cutting, improve the rolling efficiency and ensure neat cutting edges, thereby ensuring the quality of rolling.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial cross-sectional view of the auxiliary part of this utility model;

[0019] Figure 3 This is a schematic diagram of the overall structure of the motor of this utility model;

[0020] Figure 4This is a partial cross-sectional view of the present invention.

[0021] Figure 5 This is a partial cross-sectional view of the cutting part of this utility model;

[0022] Figure 6 This is a partial cross-sectional view of the snap-fit ​​assembly of this utility model;

[0023] Figure 7 This is a partial cross-sectional view of the limiting component of this utility model;

[0024] Figure 8 This is a schematic diagram of the overall structure of the paper winding wheel of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Auxiliary section; 101. Support 1; 102. Motor; 103. Support 2; 104. Guide roller; 105. Support 3; 106. Collar; 107. Bolt; 108. Threaded hole; 2. Adjustment section; 21. Snap-fit ​​assembly; 211. Rotating shaft; 212. Support roller; 213. Groove; 214. Connecting ring; 215. Spring 1; 216. Protrusion; 22. Limiting assembly; 221. Discharge section 222. Paper roller; 223. Knife ring; 224. Limiting groove; 225. Blade 1; 226. Rewinding paper roller; 227. Locking block; 228. Spring 2; 3. Cutting section; 31. Fixing assembly; 311. Electric telescopic rod; 312. Fixing block 1; 313. Fixing block 2; 314. Receiving groove 1; 315. Receiving groove 2; 32. Dividing assembly; 321. Slider; 322. Handle; 323. Blade 2. 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 Figure 1-8As shown, this utility model is an intelligent slitting device for nonwoven fabric processing, including a support frame 101, and also including: an auxiliary part 1, which is mounted on the support frame 101; an adjustment part 2, which is located on the support frame 101; and a cutting part 3, which is disposed on the support frame 101. The auxiliary part 1 includes a motor 102 fixedly connected to the rear side of the support frame 101. The output shaft of the motor 102 is fixedly connected to the rotating shaft 211 on the left side through a coupling. Two supports 103 are fixedly connected to the inner wall of the support frame 101. The inner wall is rotatably connected with several guide rollers 104. The front side of the bracket 101 is provided with a sealing member, which is used to support the rotation of several rotating shafts 211. The sealing member includes a bracket 3 105 provided on the front side of the bracket 101. The inner wall of the bracket 3 105 is fixedly connected with several collars 106. The collars 106 are respectively adapted to the several rotating shafts 211. The inner wall of the bracket 3 105 is provided with two bolts 107. The front side of the bracket 101 has two threaded holes 108, and the two bolts 107 are respectively adapted to the two threaded holes 108.

[0029] Adjustment part 2 includes a snap-fit ​​assembly 21, which is mounted on bracket 101; and a limiting assembly 22, which is located inside bracket 101. The snap-fit ​​assembly 21 includes several rotating shafts 211 rotatably connected to the inner wall of bracket 101. Support rollers 212 are fixedly connected to the outer walls of each of the rotating shafts 211. Several grooves 213 are formed on the inner walls of each of the support rollers 212. Several connecting rings 214 are provided outside each of the support rollers 212, and elastic elements are provided inside each of the connecting rings 214. Several elastic elements are used to limit the position of several connecting rings 214. Each elastic element includes a spring 215 fixedly connected to the inner wall of the connecting ring 214. A protrusion 216 is slidably connected to the inner wall of the connecting ring 214. The bottom of the spring 215 is fixedly connected to the protrusion 216, and the spring 215 and the protrusion 216 are adapted to each other. The limiting assembly 22 includes paper discharge rollers 221 disposed on several connecting rings 214 on the right side. A blade ring 222 is fitted onto the outer wall of several connecting rings 214 located above. The inner wall of each blade ring 222 is... The device has several limiting grooves 223, and blades 224 are fixedly connected to the outer walls of several blade rings 222. A winding paper roller 225 is fitted onto the outer walls of several connecting rings 214 on the left side. Limiting elements are provided within the limiting grooves 223 to ensure the positions of the discharge paper roller 221, blades 224, and winding paper roller 225. Each limiting element includes a locking block 226 slidably connected to the inner wall of the connecting ring 214. A spring 227 is fixedly connected to the side of the locking block 226 closest to the support roller 212. The side of the locking block 226 is fixedly connected to the connecting ring 214. Several locking blocks 226 located above are respectively adapted to several limiting grooves 223. By setting the adjustment part 2, the number and width of the rolls can be adjusted by the arrangement and position of the connecting ring 214, the paper feed roller 221, the knife ring 222 and the paper take-up roller 225. This not only ensures the stability of the position of each component during the roll-up process and guarantees the smooth progress of the roll-up operation, but also adapts to the roll-up requirements of various specifications of non-woven fabrics, thereby improving the practicality of the device.

[0030] The cutting section 3 includes a fixing component 31, which is disposed on the left side of the two supports 103; and a dividing component 32, which is disposed on the support 101. The fixing component 31 is used to fix the non-woven fabric, while the dividing component 32 is used to cut the non-woven fabric. The fixing component 31 includes an electric telescopic rod 311 fixedly connected to the inner wall of the bottom of the support 101. A fixing block 312 is fixedly connected to the top of the electric telescopic rod 311. The rear side of the fixing block 312 is slidably connected to the support 101. A second fixing block 313 is fixedly connected to the support 101. The top of the fixing block 312 has a receiving groove 314, and the inner wall of the second fixing block 313 has a receiving groove. The second groove 315, which receives the second groove 315, passes through the second fixing block 313. The first groove 314 and the second groove 315 are both vertically arranged and their trajectories overlap. The dividing component 32 includes a slider 321 that is slidably connected to the inner wall of the second fixing block 313. A handle 322 is fixedly connected to the top of the slider 321, and a blade 323 is fixedly connected to the bottom of the slider 321. The bottom of the blade 323 extends to the outside of the second groove 315. By setting the cutting part 3, the non-woven fabric can be fixed by the fixing component 31 and the dividing component 32 can cut the non-woven fabric. This can avoid cutting displacement, quickly complete the cutting, improve the winding efficiency, and ensure that the cutting edge is neat, thereby ensuring the quality of winding.

[0031] It should be noted that the control of the motor 102 and the electric telescopic rod 311 in this application can both be achieved by using a program set in the control panel and inputting relevant parameters as needed for automated control. This control method can be achieved using existing technologies, such as PLC.

[0032] A specific application of this embodiment is as follows: In use, bolt 107 can be unscrewed, and bracket 3 105 can be removed from bracket 1 101. Then, as needed, connecting ring 214 can be pushed into the outer wall of the upper support roller 212 and moved to the corresponding groove 213. During this process, protrusion 216 will be squeezed, causing spring 1 215 to compress and generate elastic force. After connecting ring 214 moves to the corresponding position, under the action of spring 1 215, protrusion 216 will be driven into the corresponding groove 213, thus completing the fixation. Then, blade ring 222 can be fitted onto the outer wall of connecting ring 214 and positioned by limiting groove 223. During the fitting of blade ring 222, the limiting groove 223 will squeeze the locking block 226, causing... The blade 224 slides into the connecting ring 214, compressing the second spring 227 and generating elastic force. After the blade ring 222 is in place, the elastic force of the second spring 227 will lock the limiting groove 223 through the locking block 226, thereby fixing the first blade 224 onto the connecting ring 214 through the blade ring 222. Then, the support rollers 212 on the left and right sides are processed in the same way, and the corresponding connecting rings 214 are installed. Before installing the connecting ring 214 on the left, the take-up paper roller 225 is sleeved on the outer wall of the connecting ring 214, and the elastic force transmitted from the second spring 227 to the locking block 226 is used to fix the take-up paper roller 225. Similarly, the output paper roller 221 with the non-woven fabric to be cut is sleeved on the connecting ring 214 on the right. Similarly, the bracket 3 105 can be installed. After installation, insert several rotating shafts 211 into several collars 106. Then, pull the nonwoven fabric out from the feed paper roller 221, around the top of the right guide roller 104, pull it to the left, around the bottom of the upper support roller 212, around the top of the upper left guide roller 104, pull it to the right, around the bottom of the lower left guide roller 104, and finally pass between the fixing block 1 312 and the fixing block 2 313, and wrap it around the take-up paper roller 225 and fix it. Then, start the motor 102, so that its output shaft drives the rotating shaft 211 on the left to rotate, thereby driving the nonwoven fabric to be wound up through the left support roller 212 and the take-up paper roller 225. At this time, the nonwoven fabric will be taut, thus reaching the upper left guide roller. The nonwoven fabric between guide roller 104 and the upper right guide roller 104 is pressed against blade 224 and cut by the action of blade 224. After the cut part is wound onto the take-up paper roller 225, motor 102 can be turned off and electric telescopic rod 311 can be started. Its output shaft drives fixing block 312 to press against the nonwoven fabric and move closer to fixing block 313. Finally, the nonwoven fabric is fixed by fixing block 312 and fixing block 313. Then, the slider 321 can be pulled by handle 322, which drives blade 323 to pass between receiving groove 314 and receiving groove 315, thereby cutting the nonwoven fabric. Then, bracket 3 105 can be removed, and several wound take-up paper rollers 225 can be taken out together.Finally, use a cutter to cut off any remaining non-woven fabric connecting the several take-up paper rollers 225, then replace them with new take-up paper rollers 225, and reposition the bracket 3 105. Then, activate the electric telescopic rod 311 to lower the fixing block 312, and then wrap the non-woven fabric around the new take-up paper rollers 225 for rewinding.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent slitting device for nonwoven fabric processing, comprising a support frame (101), characterized in that, Also includes: Auxiliary part (1), said auxiliary part (1) is mounted on bracket one (101); Adjustment part (2), the adjustment part (2) is located on bracket one (101); The cutting part (3) is disposed on the bracket (101); The adjustment part (2) includes a snap-fit ​​assembly (21) disposed on the bracket (101); and Limiting component (22), the limiting component (22) is located inside bracket one (101); The snap-fit ​​assembly (21) includes a plurality of rotating shafts (211) rotatably connected to the inner wall of the bracket (101). Each of the plurality of rotating shafts (211) has a support roller (212) fixedly connected to its outer wall. Each of the plurality of support rollers (212) has a plurality of grooves (213) on its inner wall. Each of the plurality of support rollers (212) has a plurality of connecting rings (214) on its outer side. Each of the plurality of connecting rings (214) has an elastic element inside its inner side. Among them, several elastic elements are used to restrict the position of several connecting rings (214).

2. The intelligent slitting device for nonwoven fabric processing according to claim 1, characterized in that, The auxiliary part (1) includes a motor (102) fixedly connected to the rear side of the bracket (101). The output shaft of the motor (102) is fixedly connected to the rotating shaft (211) on the left side through a coupling. Two brackets (103) are fixedly connected to the inner wall of the bracket (101). Several guide rollers (104) are rotatably connected to the inner walls of the two brackets (103). A closure is provided on the front side of the bracket (101). The closure is used to support the rotation of several rotating shafts (211).

3. The intelligent slitting device for nonwoven fabric processing according to claim 2, characterized in that, The cutting section (3) includes a fixing component (31) disposed on the left side of the two brackets (103); and A dividing component (32) is disposed on a support (101); The fixing component (31) is used to fix the nonwoven fabric, while the dividing component (32) is used to cut the nonwoven fabric.

4. The intelligent slitting device for nonwoven fabric processing according to claim 3, characterized in that, The limiting component (22) includes a paper feed roller (221) disposed on a plurality of connecting rings (214) on the right side. A blade ring (222) is sleeved on the outer wall of the plurality of connecting rings (214) located above. A plurality of limiting grooves (223) are opened on the inner wall of the plurality of blade rings (222). A blade (224) is fixedly connected to the outer wall of the plurality of blade rings (222). A paper take-up roller (225) is sleeved on the outer wall of the plurality of connecting rings (214) located on the left side. A limiting element is provided in each of the plurality of limiting grooves (223). The limiting component is used to ensure the position of the paper feed roller (221), the first blade (224), and the paper take-up roller (225).

5. The intelligent slitting device for nonwoven fabric processing according to claim 4, characterized in that, The fixing component (31) includes an electric telescopic rod (311) fixedly connected to the inner wall of the bottom of the bracket (101). The top of the electric telescopic rod (311) is fixedly connected to a fixing block (312). The rear side of the fixing block (312) is slidably connected to the bracket (101). The bracket (101) is fixedly connected to a fixing block (313). The top of the fixing block (312) is provided with a receiving groove (314). The inner wall of the fixing block (313) is provided with a receiving groove (315). The receiving groove (315) penetrates the fixing block (313). Among them, the first receiving trough (314) and the second receiving trough (315) are both vertically arranged, and their trajectories overlap.

6. The intelligent slitting device for nonwoven fabric processing according to claim 5, characterized in that, The dividing component (32) includes a slider (321) that is slidably connected to the inner wall of the fixed block two (313). A handle (322) is fixedly connected to the top of the slider (321), and a blade two (323) is fixedly connected to the bottom of the slider (321). The bottom of the second blade (323) extends outside the second receiving groove (315).

7. The intelligent slitting device for nonwoven fabric processing according to claim 6, characterized in that, The elastic element includes a spring (215) fixedly connected to the inner wall of the connecting ring (214), and a protrusion (216) is slidably connected to the inner wall of the connecting ring (214). The bottom of the spring (215) is fixedly connected to the protrusion (216). Among them, spring 1 (215) is adapted to protrusion (216).

8. The intelligent slitting device for nonwoven fabric processing according to claim 7, characterized in that, The closure includes a third bracket (105) disposed on the front side of the first bracket (101). The inner wall of the third bracket (105) is fixedly connected with several collars (106). The collars (106) are respectively adapted to several rotating shafts (211). The inner wall of the third bracket (105) is provided with two bolts (107). The front side of the first bracket (101) has two threaded holes (108). Two bolts (107) are respectively matched with two threaded holes (108).

9. The intelligent slitting device for nonwoven fabric processing according to claim 8, characterized in that, The limiting component includes a locking block (226) that is slidably connected to the inner wall of the connecting ring (214). A second spring (227) is fixedly connected to the side of the locking block (226) near the support roller (212), and the side of the second spring (227) away from the locking block (226) is fixedly connected to the connecting ring (214). Among them, several card blocks (226) located at the top are respectively adapted to several limiting slots (223).