Yarn looseness eliminating device and spinning machine

Abstract

The invention relates to the technical field of tension devices in spinning machines, and discloses a yarn slack eliminating device and a spinning machine in order to eliminate yarn slack and prevent yarn from winding a plurality of tensioning wheels in normal work. A cylindrical air bag is arranged on the circumferential surface of a yarn storage roller in a sleeving mode and is communicated with a cylinder body of an air cylinder; when yarn on the yarn storage roller is increased, air in the cylindrical air bag is squeezed into the air cylinder, and the yarn pulling wheel is driven to stretch in the yarn. During normal work, when the yarn is not loosened, a gap is reserved between the yarn pulling wheel and the yarn, and the situation that the yarn is excessively stretched and the surface of the yarn is subjected to redundant friction force is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of tension devices in spinning machines, and more specifically, to a yarn slack elimination device and a spinning machine. Background Art

[0002] Spinning is the process of using twist to make fibers hold together to form a continuously extending yarn; one type of spinning machine generates a rotating airflow in a spinning chamber by ejecting compressed air from an air-jet spinning nozzle, and uses this rotating airflow to twist a fiber bundle to generate a yarn. During the spinning process of this type of spinning machine, the tension of the advancing yarn will affect the quality of the yarn; how to maintain an appropriate tension for the yarn upstream of the winding device is a research topic worthy of attention.

[0003] The spinning machine described in the patent application "Spinning Machine" (Publication No. CN119685979A) includes a drafting device, an air-jet spinning device, and a winding device. The drafting device drafts the fiber bundle, the air-jet spinning device twists the fiber bundle drafted by the drafting device to generate a yarn, and the winding device winds up the yarn to form a package. This spinning machine also includes a yarn storage roller and a yarn hanging member. The yarn storage roller is arranged between the air-jet spinning device and the winding device and is used to store the yarn; the yarn storage roller pulls out the yarn from the air-jet spinning device, and the yarn hanging member unwinds the yarn from the above-mentioned yarn storage roller.

[0004] The winding device winds up the yarn unwound by the yarn hanging member. It is difficult for the yarn storage roller and the winding device to achieve absolutely synchronous start-stop actions. Therefore, even if the yarn hanging member can rotate relative to the yarn storage roller, it is difficult for the yarn hanging member to ensure that the yarn tension between the yarn storage roller and the winding device remains constant, and even the yarn between the yarn hanging member and the winding device may become slack. In order to eliminate the problem of yarn slack between the yarn hanging member and the winding device, a tensioning device is often additionally installed in the path between the two. For example, the patent "A Feeding and Guiding Device for Processing Cationic Polyester Yarn" (Publication No. CN118929341B) adjusts the tension through a lifting frame and a tensioning wheel to eliminate yarn slack. This way of eliminating yarn slack extends the yarn path, and the yarn must always be wound around multiple groups of tensioning wheels. The yarn is continuously subjected to the tension and relative friction of the tensioning wheels during the winding process, which inevitably causes the yarn to be overstretched, and the above-mentioned friction may reduce the surface quality of the yarn. Summary of the Invention

[0005] The object of the present invention is to provide a yarn slack elimination device and a spinning machine, which can not only eliminate slack but also ensure that when the yarn is not slack, the pulling wheel does not contact the yarn, avoiding excessive stretching of the yarn during the spinning process; reducing the relative friction on the surface of the yarn during the spinning process to avoid the relative friction reducing the surface quality of the yarn.

[0006] Embodiments of the present invention are achieved through the following technical solutions: First, a yarn relaxation elimination device is provided, including a yarn storage component and a tensioning component, and the yarn storage component is configured with a yarn hanging component; the yarn storage component includes a yarn storage roller, a cylindrical airbag, and a first motor for driving the rotation of the yarn storage roller. The cylindrical airbag is sleeved on the circumferential surface of the yarn storage roller and is fixedly connected to the yarn storage roller.

[0007] The tensioning component includes a first seat body, a cylinder, and a plurality of wire pulling members. The cylinder includes a cylinder body, a piston body, and a piston rod. The cylindrical airbag is communicated with the cylinder body. The plurality of wire pulling members are arranged on both sides of the piston rod and are spaced apart; the wire pulling member includes a first connecting rod, a second connecting rod, a third connecting rod, a sector gear, a rack, and a wire pulling wheel. The sector gear is rotatably connected to the first seat body, the sector gear is meshed with one end of the rack, the wire pulling wheel is rotatably connected to the other end of the rack, and the rack is slidably connected to the first seat body; one end of the first connecting rod is fixedly connected to the piston rod, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to one end of the third connecting rod, and the other end of the third connecting rod is fixedly connected to the sector gear.

[0008] The piston rod is distributed along the path of the yarn. The sector gear is arranged on one side of the yarn, the wire pulling wheel is arranged on the other side of the yarn, and there is a gap between the wire pulling wheel and the yarn.

[0009] In an embodiment of the present invention, a pair of discs is fixedly connected to the wire pulling wheel, and the pair of discs is arranged at both ends of the wire pulling wheel; a C-shaped annular groove is formed between the pair of discs and the wire pulling wheel; the C-shaped annular grooves are staggered on both sides of the yarn.

[0010] In an embodiment of the present invention, the first connecting rod and the rack are respectively perpendicular to the piston rod.

[0011] In an embodiment of the present invention, the cylindrical airbag is made of rubber material. The cylindrical airbag includes an inner cylinder, an outer cylinder, and an end ring connecting the inner cylinder and the outer cylinder. The end ring includes a connected inner end ring and an outer end ring. The inner end ring is fixedly connected to the inner cylinder, the outer end ring is fixedly connected to the outer cylinder, and the thickness of the inner end ring and the inner cylinder is greater than the thickness of the outer end ring and the outer cylinder. In an embodiment of the present invention, the outer cylinder is in a waist-shaped cylindrical shape, and a fillet transition ring is arranged between the outer end ring and the outer cylinder.

[0012] In an embodiment of the present invention, the first motor is arranged at one end of the yarn storage roller, and a rotary pipe joint is arranged at the other end of the yarn storage roller. The rotary pipe joint includes a rotating part and a fixed part that are rotatably connected. The cylindrical airbag is communicated with a guide air pipe. One end of the guide air pipe is communicated with the inner cylinder, and the other end of the guide air pipe is communicated with the rotating part; the rotary pipe joint and the inner cylinder are arranged coaxially; the fixed part is connected to the cylinder body through a pipeline.

[0013] In an embodiment of the present invention, the first base body is fixedly connected with a support for supporting the fixing part.

[0014] Second, a spinning machine is provided, which includes a drafting device, a spinning device and a winding device, and the above-mentioned yarn slack elimination device is also arranged between the spinning device and the winding device.

[0015] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: 1. There is a gap between the wire pulling wheel and the yarn. During the normal winding process of the winding device, that is, when the yarn is not slack, the wire pulling wheel will not contact the yarn. Then, this yarn slack elimination device will not always tension the yarn in order to achieve a tensioning effect on the yarn, thus avoiding overstretching the yarn and preventing the formation of mutual friction forces that would reduce the surface quality of the yarn. 2. When the yarn becomes slack, at this time, the winding speed of the winding device is lower than the winding speed of the yarn storage roller. The winding device cannot timely pull down the yarn on the yarn storage roller through the yarn hanging component, and the yarn on the yarn storage roller suddenly increases. The extrusion force of the yarn on the yarn storage roller on the cylindrical airbag increases, squeezing the gas in the cylindrical airbag into the cylinder block, driving the piston rod to extend outwards. The piston rod drives the sector gear to rotate through the first connecting rod, the second connecting rod and the third connecting rod. The sector gear drives the rack to move towards the side away from the piston rod, thereby driving the wire pulling wheel to approach the yarn; the wire pulling wheels on both sides move away from each other, thus increasing the yarn path, tensioning the yarn, and eliminating the slack of the yarn. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following will briefly introduce the drawings required to be used in the embodiment. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the yarn slack elimination device of the present invention; Figure 2 It is a schematic structural diagram of the yarn passing through the wire pulling members on both sides of the piston rod when the yarn is not slack; Figure 3 It is a schematic structural diagram of the wire pulling member tensioning the yarn after the yarn becomes slack; Figure 4 It is a schematic structural diagram of the yarn storage assembly; Figure 5 It is a cross-sectional view of the cylindrical airbag; Figure 6 It is a cross-sectional view of the wire pulling wheel; Figure 7This is a schematic structural diagram of one set of spinning units in the spinning machine of the present invention.

[0018] Icon: 10 - Yarn storage component, 11 - Yarn storage roller, 12 - Cylindrical airbag, 121 - Inner cylinder, 122 - Outer cylinder, 123 - End ring, 123a - Inner end ring, 123b - Outer end ring, 124 - Rounded transition ring, 13 - First motor, 14 - Air duct, 15 - Support, 20 - Tensioning component, 21 - First seat body, 22 - Cylinder, 221 - Cylinder block, 222 - Piston rod, 23 - Cable component, 231 - First connecting rod, 232 - Second connecting rod, 233 - Third connecting rod, 234 - Sector gear, 235 - Rack, 236 - Cable pulley, 237 - Disc, 238 - C-shaped ring groove, 30 - Yarn hanging component, 40 - Rotary pipe joint, 41 - Rotating part, 42 - Fixed part, 50 - Drafting device, 60 - Spinning device, 70 - Winding device. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present invention, it should be noted that if terms such as "inner" and "outer" are used to indicate the orientation or positional relationship, which is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present invention is usually placed during use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0023] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, terms such as "set", "installed", "configured", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] Embodiment 1: Please refer to Figures 1-6 , a yarn slack elimination device, configured between a spinning device 60 and a winding device 70. This yarn slack elimination device includes a yarn storage component 10 and a tensioning component 20, and the yarn storage component 10 is configured with a yarn hanging component 30; the yarn storage component 10 includes a yarn storage roller 11, a cylindrical airbag 12, and a first motor 13 for driving the yarn storage roller 11 to rotate. The cylindrical airbag 12 is sleeved on the circumferential surface of the yarn storage roller 11, and the cylindrical airbag 12 is fixedly connected to the yarn storage roller 11.

[0025] Refer to Figure 2 and Figure 3 , the tensioning component 20 includes a first seat body 21, a cylinder 22, and a plurality of wire pulling members 23. The cylinder 22 includes a cylinder body 221, a piston body, and a piston rod 222. The cylindrical airbag 12 is communicated with the cylinder body 221. The above-mentioned plurality of wire pulling members 23 are arranged on both sides of the piston rod 222 and are spaced apart; the wire pulling member 23 includes a first connecting rod 231, a second connecting rod 232, a third connecting rod 233, a sector gear 234, a rack 235, and a wire pulling wheel 236. The sector gear 234 is rotatably connected to the first seat body 21. The sector gear 234 is meshed and connected to one end of the rack 235. The wire pulling wheel 236 is rotatably connected to the other end of the rack 235, and the rack 235 is slidably connected to the first seat body 21; one end of the first connecting rod 231 is fixedly connected to the piston rod 222, the other end of the first connecting rod 231 is hinged to one end of the second connecting rod 232, the other end of the second connecting rod 232 is hinged to one end of the third connecting rod 233, and the other end of the third connecting rod 233 is fixedly connected to the sector gear 234.

[0026] The piston rod 222 is distributed along the path of the yarn. The sector gear 234 is arranged on one side of the yarn, and the wire pulling wheel 236 is arranged on the other side of the yarn, and there is a gap between the wire pulling wheel 236 and the yarn. In this embodiment, the gap distance is 4 millimeters. In other embodiments, the gap distance can also be set to any value between 3 and 10 millimeters.

[0027] It should be noted that: with the above-mentioned gap left between the wire drawing wheel 236 and the yarn, during the normal winding process of the coiling device 70, that is, when the yarn is not slack, the wire drawing wheel 236 will not touch the yarn. Then, this yarn slack elimination device will not tension the yarn from beginning to end in order to achieve a tensioning effect on the yarn, so as not to over-stretch the yarn, and even less to form mutual frictional force resulting in the reduction of the surface quality of the yarn. When the yarn is slack, at this time, the winding speed of the coiling device 70 is lower than the wire winding speed of the yarn storage roller 11. The coiling device 70 fails to pull down the yarn on the yarn storage roller 11 through the yarn hanging assembly 30 in time, and the yarn on the yarn storage roller 11 suddenly increases. The extrusion force of the yarn on the yarn storage roller 11 on the cylindrical airbag 12 increases, and the gas in the cylindrical airbag 12 is extruded into the cylinder block 221, driving the piston rod 222 to extend outwards. The piston rod 222 drives the sector gear 234 to rotate through the first connecting rod 231, the second connecting rod 232 and the third connecting rod 233. The sector gear 234 drives the rack 235 to move towards the side away from the piston rod 222, thereby driving the wire drawing wheel 236 to approach the yarn; the wire drawing wheels 236 on both sides move away from each other, thereby increasing the yarn path, tensioning the yarn, and eliminating the slack of the yarn. The above-mentioned driving of the piston rod 222 to extend outwards is directly shown as the piston rod 222 moving downwards in Attachment Figure 2 and Attachment Figure 3 In, it is directly shown that the piston rod 222 moves downward, the piston rod 222 drives the second connecting rod 232 to move downward, and the second connecting rod 232 drives the fixedly connected third connecting rod 233 and the sector gear 234 to rotate. The rotating sector gear 234 drives the rack 235 to move towards both sides of the piston rod 222, thereby realizing the mutual separation of the wire drawing wheels 236 on both sides.

[0028] It should be further noted that when the coiling device 70 resumes the normal rotation speed of winding the yarn, the coiling device 70 pulls the yarn wound between the wire drawing members 23, and the yarn is gradually straightened, and the wire drawing members 23 gradually return to their original positions; at the same time, after the yarn is pulled by the coiling device 70, the number of turns of the yarn stored on the yarn storage roller 11 decreases, and the compressed gas in the cylinder 22 is reversely conveyed into the cylindrical airbag 12. At the same time, referring to Attachment Figure 7 , the rotating yarn storage roller 11 is used to pull the yarn out of the spinning device 60 on the one hand, and the yarn storage roller 11 is used for the buffering of the yarn, that is, when the coiling device 70 is operating at the normal working speed, a certain amount of yarn is stored on the yarn storage roller 11. When the rotation speed of the coiling device 70 decreases, the storage amount of the yarn on the yarn storage roller 11 will increase, and when the rotation speed of the coiling device 70 increases, the storage amount of the yarn on the yarn storage roller 11 will decrease, thereby realizing the buffering effect of the yarn on the yarn storage roller 11. When the amount of yarn wound on the yarn storage roller 11 increases, the extrusion effect of the yarn on the cylindrical airbag 12 will become larger; when the amount of yarn wound on the yarn storage roller 11 decreases, the extrusion effect of the yarn on the cylindrical airbag 12 will become smaller, and the cylindrical airbag 12 returns to its deformed state under its own elastic action.

[0029] Referring to Figure 6 , in this embodiment, a pair of discs 237 are fixedly connected to the wire drawing wheel 236, and the pair of discs 237 are respectively disposed at both ends of the wire drawing wheel 236; a C-shaped annular groove 238 is formed between the pair of discs 237 and the wire drawing wheel 236; the C-shaped annular grooves 238 are staggered on both sides of the yarn, thereby forming a channel allowing the yarn to pass through. When the yarn relaxes, the yarn still falls into the C-shaped annular groove 238, so that when the yarn needs to be tensioned, the yarn is prevented from falling off the wire drawing wheel 236.

[0030] Referring to Figure 2 and Figure 3 , in this embodiment, the first connecting rod 231 and the rack 235 are respectively perpendicular to the piston rod 222. When the yarn needs to be tightened, the rack 235 quickly moves to both sides away from the piston rod 222.

[0031] Referring to Figure 5 , in this embodiment, the cylindrical airbag 12 is configured of rubber material. The cylindrical airbag 12 includes an inner cylinder 121, an outer cylinder 122, and an end ring 123 connecting the inner cylinder 121 and the outer cylinder 122. The end ring 123 includes a connected end inner ring 123a and an end outer ring 123b. The end inner ring 123a is fixedly connected to the inner cylinder 121, and the end outer ring 123b is fixedly connected to the outer cylinder 122. The thickness of the end inner ring 123a and the inner cylinder 121 is greater than the thickness of the end outer ring 123b and the outer cylinder 122. The inner cylinder 121 can be stably sleeved on the circumferential surface of the yarn storage roller 11 without deformation, and the end inner ring 123a can support the cavity of the cylindrical airbag 12. The thickness of the end outer ring 123b and the outer cylinder 122 is smaller, facilitating the deformation of the end outer ring 123b along with the outer cylinder 122, and the yarn squeezes the air inside the cylindrical airbag 12.

[0032] It should be noted that a transition region with a gradually changing thickness is integrally formed between the end inner ring 123a and the end outer ring 123b. Referring to the attached Figure 5 , the described gradual change in thickness can be clearly observed, thereby ensuring the compression deformation of the cylindrical airbag 12 when the yarn increases and the elastic recovery of the cylindrical airbag 12 when the yarn decreases, and ensuring the structural stability and durability of the cylindrical airbag 12.

[0033] Another thing to note is that, for safety reasons, in other embodiments, a touch switch is disposed on the inner side of the outer cylinder 122. When the outer cylinder 122 is excessively squeezed by the yarn, the touch switch is triggered, thereby activating other air paths to supply compressed gas to the cylinder 22, driving the tensioning assembly 20 to tension the yarn, and ensuring that when the air path between the cylindrical airbag 12 and the cylinder 22 fails, the tensioning assembly 20 can still tension the yarn.

[0034] In this embodiment, the outer cylinder 122 is in the shape of a kidney-shaped cylinder, which is convenient for the yarn to be wound around the circumferential surface of the outer cylinder 122; a fillet transition ring 124 is arranged between the end outer ring 123b and the outer cylinder 122, which is convenient for the yarn to be unwound from the yarn storage roller 11 through the yarn hanging assembly 30, and continuously supplies yarn to the downstream coiling device 70. It should be noted that the unwinding principle of the yarn by the yarn hanging assembly 30 will not be elaborated here.

[0035] Referring to Figure 4 , in this embodiment, the first motor 13 is arranged at one end of the yarn storage roller 11, a rotary pipe joint 40 is arranged at the other end of the yarn storage roller 11, and the first seat body 21 is fixedly connected with a support 15 for supporting the fixing part 42. The rotary pipe joint 40 includes a rotating part 41 and a fixing part 42 which are rotatably connected. The cylindrical airbag 12 is communicated with an air guide pipe 14. One end of the air guide pipe 14 is communicated with the inner cylinder 121, and the other end of the air guide pipe 14 is communicated with the rotating part 41; the rotary pipe joint 40 and the inner cylinder 121 are arranged coaxially; the fixing part 42 is connected to the cylinder body 221 through a pipeline. Thus, it is prevented that the rotating yarn storage roller 11 winds the pipeline between the rotary pipe joint 40 and the cylinder 22. It should be noted that a sealing gasket is arranged between the rotating part 41 and the fixing part 42. The rotary pipe joint 40 is an existing component, which is usually used for gases and liquids such as water and oil, and can withstand high pressure, high temperature and high speed. The existing component will not be elaborated here.

[0036] Embodiment Two: Please refer to Figure 7 , a spinning machine, including a drafting device 50, a spinning device 60 and a coiling device 70, and the above-mentioned yarn slack elimination device is also arranged between the spinning device 60 and the coiling device 70. Figure 7 Only one set of spinning units included in the spinning machine is shown in

[0037] It should be particularly noted that the output of the yarn in the spinning device 60 depends on the pulling force generated by the rotating yarn storage roller 11. This pulling force also generates a winding and squeezing pressure on the yarn storage roller 11 through the yarn itself, that is, a winding and squeezing pressure on the cylindrical airbag 12. The continuous pulling force of the yarn between the spinning device 60 and the yarn storage roller 11 continuously winds around the outer cylinder 122 of the cylindrical airbag 12 as the rotating yarn storage roller 11 rotates. The more the number of winding turns, the greater the winding and squeezing pressure, and the greater the squeezing pressure on the cylindrical airbag 12. When the number of winding turns decreases, the winding and squeezing pressure decreases, and the cylindrical airbag 12 recovers under its own elastic action. The present invention cleverly utilizes the change in the squeezing pressure of the yarn wound on the yarn storage roller 11 to drive the tensioning assembly 20. Especially when the take-up device 70 replaces the yarn winding bobbin or for other reasons, the amount of yarn stored on the yarn storage roller 11 increases instantaneously. The yarn slack elimination device of the present invention is especially designed for the situation of instantaneous change in the amount of yarn slack.

[0038] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A yarn slack elimination device, characterized in that it includes a yarn storage component and a tensioning component, and the yarn storage component is configured with a yarn hanging component; the yarn storage component includes a yarn storage roller, a cylindrical airbag, and a first motor for driving the yarn storage roller to rotate. The cylindrical airbag is sleeved on the circumferential surface of the yarn storage roller and is fixedly connected to the yarn storage roller; the tensioning component includes a first seat body, a cylinder, and a plurality of wire-pulling components. The cylinder includes a cylinder body, a piston body, and a piston rod. The cylindrical airbag is communicated with the cylinder body. The plurality of wire-pulling components are arranged on both sides of the piston rod and are spaced apart. The wire-pulling component includes a first connecting rod, a second connecting rod, a third connecting rod, a sector gear, a rack, and a wire-pulling wheel. The sector gear is rotatably connected to the first seat body, the sector gear is meshed with one end of the rack, the wire-pulling wheel is rotatably connected to the other end of the rack, and the rack is slidably connected to the first seat body. One end of the first connecting rod is fixedly connected to the piston rod, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to one end of the third connecting rod, and the other end of the third connecting rod is fixedly connected to the sector gear; the piston rod is distributed along the path of the yarn, the sector gear is arranged on one side of the yarn, the wire-pulling wheel is arranged on the other side of the yarn, and there is a gap between the wire-pulling wheel and the yarn.

2. The yarn slack elimination device according to claim 1, characterized in that, A pair of discs are fixedly connected to the wire-pulling wheel, and the pair of discs are arranged at both ends of the wire-pulling wheel; a C-shaped annular groove is formed between the pair of discs and the wire-pulling wheel; the C-shaped annular grooves are staggered on both sides of the yarn.

3. The yarn slack elimination device according to claim 2, characterized in that, The first connecting rod and the rack are respectively vertically distributed with respect to the piston rod.

4. The yarn slack elimination device according to claim 3, characterized in that, The cylindrical airbag is configured of rubber material. The cylindrical airbag includes an inner cylinder, an outer cylinder, and an end ring connecting the inner cylinder and the outer cylinder. The end ring includes a connected end inner ring and an end outer ring. The end inner ring is fixedly connected to the inner cylinder, the end outer ring is fixedly connected to the outer cylinder, and the thickness of the end inner ring and the inner cylinder is greater than the thickness of the end outer ring and the outer cylinder.

5. The yarn slack elimination device according to claim 4, characterized in that, The outer cylinder is in a waist-shaped cylindrical shape, and a rounded transition ring is arranged between the end outer ring and the outer cylinder.

6. The yarn slack elimination device according to claim 5, characterized in that, The first motor is arranged at one end of the yarn storage roller, and a rotary pipe joint is arranged at the other end of the yarn storage roller. The rotary pipe joint includes a rotating part and a fixed part that are rotatably connected. The cylindrical airbag is communicated with a guide air pipe. One end of the guide air pipe is communicated with the inner cylinder, and the other end of the guide air pipe is communicated with the rotating part; the rotary pipe joint and the inner cylinder are configured to be distributed on the same central axis; the fixed part is connected to the cylinder body through a pipeline.

7. The yarn slack elimination device according to claim 6, characterized in that, The first seat body is fixedly connected with a support for supporting the fixed part.

8. A spinning machine, including a drafting device, a spinning device, and a winding device, Characterized in that, and a yarn slack elimination device according to any one of claims 1 to 7 is further arranged between the spinning device and the winding device.

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