Yarn slack eliminating device and spinning machine

Abstract

The present invention relates to the technical field of tension devices in spinning machines. In order to eliminate yarn slack and prevent the yarn package from bypassing multiple tensioning wheels during normal operation, a yarn slack elimination device and a spinning machine are disclosed, wherein a cylindrical air bag is sleeved on the circumferential surface of a yarn accumulation roller, and the cylindrical air bag is connected to the cylinder body of the cylinder; when the yarn on the yarn accumulation roller increases, the gas in the cylindrical air bag is squeezed into the cylinder, driving the drawing wheel to tension the yarn; when the yarn is working normally and there is no slack in the yarn, a gap is left between the drawing wheel and the yarn to avoid excessive stretching of the yarn and unnecessary friction on the yarn surface.

Description

Technical Field

[0001] The present invention relates to the technical field of a tension device in a spinning machine, and in particular to a yarn slack eliminating device and a spinning machine. Background Art

[0002] Spinning involves twisting fibers to form a continuous, elongated yarn. In a spinning machine, compressed air is ejected from a pneumatic spinning nozzle, creating a swirling airflow within the spinning chamber. This swirling airflow twists the fiber bundles, creating yarn. During the spinning process, the tension of the yarn traveling along the spinning machine affects yarn quality, and maintaining proper yarn tension upstream of the winding device is a topic of considerable research.

[0003] The spinning machine described in the patent application "Spinning Machine" (publication number CN119685979A) includes a drafting device, an air-spinning device, and a winding device. The drafting device drafts the fiber bundle, the air-spinning device twists the fiber bundle drafted by the drafting device to produce yarn, and the winding device winds the yarn to form a package. The spinning machine also includes a yarn storage roller and a yarn hanging component. The yarn storage roller is arranged between the air-spinning device and the winding device to store the yarn; the yarn storage roller pulls the yarn from the air-spinning device, and the yarn hanging component unwinds the yarn from the yarn storage roller.

[0004] The winding device rewinds the yarn unwound by the yarn hanging component. It is difficult for the yarn storage roller and the winding device to start and stop in absolute synchronization. Therefore, even if the yarn hanging component can rotate relative to the yarn storage roller, it is difficult for the yarn hanging component to maintain a constant yarn tension between the yarn storage roller and the winding device. The yarn between the yarn hanging component and the winding device may even slack. To eliminate the problem of yarn slack between the yarn hanging component and the winding device, an additional tensioning device is often installed in the path between the two. For example, the patent "A Feeding Guide Device for Cationic Polyester Yarn Processing" (Publication No. CN118929341B) adjusts the tension by a lifting frame and a tensioning pulley to eliminate yarn slack. This method of eliminating yarn slack extends the yarn path and requires the yarn to be continuously wrapped around multiple sets of tensioning pulleys. During the winding process, the yarn is continuously subjected to the tension and relative friction of the tensioning pulleys, which inevitably causes the yarn to be overstretched. The above-mentioned friction may also reduce the surface quality of the yarn. Summary of the Invention

[0005] The purpose 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 the pulling wheel does not contact the yarn when the yarn is not slack, thereby avoiding excessive stretching of the yarn during the spinning process; reduce the relative friction of the yarn surface during the spinning process to avoid the relative friction force reducing the surface quality of the yarn.

[0006] The embodiments of the present invention are achieved through the following technical solutions:

[0007] First, a yarn slack elimination device is provided, including a yarn storage assembly and a tensioning assembly, and the yarn storage assembly is equipped with a yarn hanging assembly; the yarn storage assembly includes a yarn storage roller, a cylindrical air bag and a first motor for driving the yarn storage roller to rotate, the cylindrical air bag is sleeved on the circumferential surface of the yarn storage roller, and the cylindrical air bag is fixedly connected to the yarn storage roller.

[0008] The tensioning assembly includes a first base body, a cylinder and several wire-pulling parts. The cylinder includes a cylinder body, a piston body and a piston rod. The cylindrical airbag is connected to the cylinder body. The above-mentioned several wire-pulling parts are arranged on both sides of the piston rod and are distributed at intervals; the wire-pulling parts include a first connecting rod, a second connecting rod, a third connecting rod, a fan gear, a gear rod and a wire-pulling wheel. The fan gear is rotatably connected to the first base body, the fan gear is meshed with one end of the gear rod, the wire-pulling wheel is rotatably connected to the other end of the gear rod, and the gear rod is slidably connected to the first base body; one end of the first connecting rod is fixedly connected to the piston rod, the other end of the first connecting rod is hingedly connected to one end of the second connecting rod, the other end of the second connecting rod is hingedly connected to one end of the third connecting rod, and the other end of the third connecting rod is fixedly connected to the fan gear.

[0009] The piston rod is distributed along the path of the yarn, the fan gear is arranged on one side of the yarn, and the drawing wheel is arranged on the other side of the yarn, and a gap is left between the drawing wheel and the yarn.

[0010] In one embodiment of the present invention, the pulling wheel is fixedly connected to a pair of discs, which are respectively arranged at both ends of the pulling wheel; a C-shaped annular groove is formed between the pair of discs and the pulling wheel; and the C-shaped annular groove is staggered on both sides of the yarn.

[0011] In one embodiment of the present invention, the first connecting rod and the gear rod are respectively distributed perpendicular to the piston rod.

[0012] In one embodiment of the present invention, the cylindrical airbag is configured to be made of rubber material. The cylindrical airbag includes an inner tube, an outer tube and an end ring connecting the inner tube and the outer tube. The end ring includes an inner end ring and an outer end ring that are connected. The inner end ring is fixedly connected to the inner tube, and the outer end ring is fixedly connected to the outer tube. The thickness of the inner end ring and the inner tube is greater than the thickness of the outer end ring and the outer tube.

[0013] In one embodiment of the present invention, the outer cylinder is in a waist-shaped cylinder, and a rounded transition ring is disposed between the end outer ring and the outer cylinder.

[0014] In one embodiment of the present invention, a first motor is arranged at one end of the yarn accumulation roller, and a rotary tube joint is arranged at the other end of the yarn accumulation roller. The rotary tube joint includes a rotating part and a fixed part that are rotatably connected. The cylindrical air bag is connected to an air guide tube, one end of the air guide tube is connected to the inner tube, and the other end of the air guide tube is connected to the rotating part; the rotary tube joint and the inner tube are arranged to be distributed along a common central axis; the fixed part is connected to the cylinder pipe.

[0015] In one embodiment of the present invention, the first base is fixedly connected to a support for supporting the fixing portion.

[0016] Secondly, a spinning machine is provided, comprising a drafting device, a spinning device and a winding device, wherein the yarn slack eliminating device is further arranged between the spinning device and the winding device.

[0017] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0018] 1. There is a gap between the drawing wheel and the yarn. When the winding device is winding the yarn normally, that is, when the yarn is not slack, the drawing wheel will not contact the yarn. Therefore, the yarn slack elimination device will not always tension the yarn in order to achieve the tensioning effect on the yarn, thereby avoiding excessive stretching of the yarn and generating mutual friction to reduce the surface quality of the yarn.

[0019] 2. When the yarn becomes slack, the winding speed of the winding device is lower than the winding speed of the yarn storage roller. The winding device cannot pull the yarn on the yarn storage roller through the yarn hanging assembly in time. The yarn on the yarn storage roller suddenly increases, and the extrusion force of the yarn on the yarn storage roller on the cylindrical air bag increases, squeezing the gas in the cylindrical air bag into the cylinder body, driving the piston rod to extend outward, and the piston rod drives the fan gear to rotate through the first connecting rod, the second connecting rod and the third connecting rod, and the fan gear drives the gear rod to move to the side away from the piston rod, thereby driving the drawing wheel to approach the yarn; the drawing wheels on both sides move away from each other, thereby increasing the yarn path, tightening the yarn, and eliminating the slack of the yarn. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 Schematic diagram of the structure of the yarn slack eliminating device of the present invention;

[0022] Figure 2 Schematic diagram of the structure of the yarn passing through the wire drawing members on both sides of the piston rod when the yarn is not slack;

[0023] Figure 3 This is a schematic diagram of the structure in which the yarn is tensioned by the tensioning member after the yarn is relaxed;

[0024] Figure 4 Schematic diagram of the structure of the yarn storage component;

[0025] Figure 5 is a cross-sectional view of a cylindrical airbag;

[0026] Figure 6 is a cross-sectional view of the wire drawing wheel;

[0027] Figure 7 It is a schematic structural diagram of one group of spinning units in the spinning machine of the present invention.

[0028] icon:

[0029] 10-yarn storage assembly, 11-yarn storage roller, 12-cylindrical air bag, 121-inner cylinder, 122-outer cylinder, 123-end ring, 123a-end inner ring, 123b-end outer ring, 124-rounded transition ring, 13-first motor, 14-air guide tube, 15-support, 20-tensioning assembly, 21-first seat body, 22-cylinder, 221-cylinder body, 222-piston rod, 23-wire pulling member, 231-first connecting rod, 232-second connecting rod, 233-third connecting rod, 234-fan gear, 235-tooth rod, 236-wire pulling wheel, 237-disc, 238-C-shaped ring groove, 30-yarn hanging assembly, 40-rotating pipe joint, 41-rotating part, 42-fixed part, 50-drafting device, 60-spinning device, 70-winding device. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] 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 invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of the present invention, it should be noted that if the terms "inside" and "outside" appear to indicate an orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the product of the invention is usually placed when in use. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0034] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "dispose," "install," "configure," and "connect" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] Example 1:

[0036] Please refer to Figures 1-6 A yarn slack elimination device is arranged between the spinning device 60 and the winding device 70. The yarn slack elimination device includes a yarn storage component 10 and a tensioning component 20, and the yarn storage component 10 is provided with a yarn hanging component 30; the yarn storage component 10 includes a yarn storage roller 11, a cylindrical air bag 12 and a first motor 13 for driving the yarn storage roller 11 to rotate, the cylindrical air bag 12 is sleeved on the circumferential surface of the yarn storage roller 11, and the cylindrical air bag 12 is fixedly connected to the yarn storage roller 11.

[0037] Reference Figure 2 and Figure 3 The tensioning assembly 20 includes a first base 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 connected to the cylinder body 221. The plurality of wire pulling members 23 are arranged on both sides of the piston rod 222 and are distributed at intervals. 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 gear rod 235 and a wire pulling wheel 236. The sector gear 234 rotates with the first base 21. Dynamic connection, the fan gear 234 is meshed with one end of the gear rod 235, the wire pulley 236 is rotationally connected to the other end of the gear rod 235, and the gear rod 235 is slidingly 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 hingedly connected to one end of the second connecting rod 232, the other end of the second connecting rod 232 is hingedly connected to one end of the third connecting rod 233, and the other end of the third connecting rod 233 is fixedly connected to the fan gear 234.

[0038] The piston rod 222 is distributed along the path of the yarn, the fan gear 234 is arranged on one side of the yarn, and the pulling wheel 236 is arranged on the other side of the yarn, and there is a gap between the pulling wheel 236 and the yarn. In this embodiment, the gap distance is 4 mm. In other embodiments, the gap distance can also be set to any value of 3-10 mm.

[0039] It should be noted that: due to the above-mentioned gap left between the pulling wheel 236 and the yarn, the pulling wheel 236 will not touch the yarn during the normal winding process of the winding device 70, that is, when the yarn is not loose, the yarn slack elimination device will not tension the yarn from beginning to end in order to achieve the tensioning effect on the yarn, thereby not over-stretching the yarn, and not forming mutual friction to reduce the surface quality of the yarn. When the yarn is slack, the winding speed of the winding device 70 is lower than the winding speed of the yarn storage roller 11. The winding device 70 does not have time to pull the yarn on the yarn storage roller 11 through the yarn hanging assembly 30. The yarn on the yarn storage roller 11 suddenly increases, and the squeezing force of the yarn on the yarn storage roller 11 on the cylindrical air bag 12 increases. The gas in the cylindrical air bag 12 is squeezed into the cylinder body 221, driving the piston rod 222 to extend outward. The piston rod 222 drives the fan gear 234 to rotate through the first connecting rod 231, the second connecting rod 232 and the third connecting rod 233. The fan gear 234 drives the gear rod 235 to move to the side away from the piston rod 222, thereby driving the pulling wheel 236 to approach the yarn; the pulling wheels 236 on both sides move away from each other, thereby increasing the yarn path, tensioning the yarn, and eliminating the slackness of the yarn. The above-mentioned driving piston rod 222 extends outward, and at the attached Figure 2 and attached Figure 3 The piston rod 222 moves downward, the piston rod 222 drives the second connecting rod 232 to move downward, the second connecting rod 232 drives the fixedly connected third connecting rod 233 and the fan gear 234 to rotate, and the rotating fan gear 234 drives the gear rod 235 to move toward both sides of the piston rod 222, thereby achieving the pulling wheels 236 on both sides moving away from each other.

[0040] It is also necessary to explain that, when the winding device 70 resumes the normal speed of winding the yarn, the winding device 70 pulls the yarn folded between the wire pulling members 23, the yarn is gradually straightened, and the wire pulling members 23 are gradually reset; at the same time, after the yarn is pulled by the winding device 70, the number of yarn accumulation circles on the yarn accumulation roller 11 is reduced, and the compressed gas in the cylinder 22 is reversely transported to the cylindrical air bag 12. Figure 7On the one hand, the rotating yarn storage roller 11 is used to pull the yarn out of the spinning device 60, and at the same time, the yarn storage roller 11 is used for yarn buffering. That is, when the winding device 70 is operating at a normal speed, a certain amount of yarn is stored on the yarn storage roller 11. When the speed of the winding device 70 decreases, the amount of yarn stored on the yarn storage roller 11 will increase. When the speed of the winding device 70 increases, the amount of yarn stored on the yarn storage roller 11 will decrease, thereby achieving the yarn buffering effect of the yarn storage roller 11. When the amount of yarn wound on the yarn storage roller 11 increases, the squeezing effect of the yarn on the cylindrical air bag 12 will increase; when the amount of yarn wound on the yarn storage roller 11 decreases, the squeezing effect of the yarn on the cylindrical air bag 12 will decrease, and the cylindrical air bag 12 will recover its deformation under the action of its own elasticity.

[0041] Reference Figure 6 In this embodiment, the pulling wheel 236 is fixedly connected to a pair of discs 237, and the pair of discs 237 are respectively arranged at both ends of the pulling wheel 236; a C-shaped annular groove 238 is formed between the pair of discs 237 and the pulling 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 is relaxed, 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 pulling wheel 236.

[0042] Reference Figure 2 and Figure 3 In this embodiment, the first connecting rod 231 and the gear rod 235 are respectively distributed perpendicular to the piston rod 222. When the yarn needs to be tightened, the gear rod 235 moves quickly to both sides away from the piston rod 222.

[0043] Reference Figure 5 In this embodiment, the cylindrical airbag 12 is configured to be made of rubber material. The cylindrical airbag 12 includes an inner tube 121, an outer tube 122 and an end ring 123 connecting the inner tube 121 and the outer tube 122. The end ring 123 includes an inner end ring 123a and an outer end ring 123b connected. The inner end ring 123a is fixedly connected to the inner tube 121, and the outer end ring 123b is fixedly connected to the outer tube 122. The thickness of the inner end ring 123a and the inner tube 121 is greater than the thickness of the outer end ring 123b and the outer tube 122. The inner tube 121 can be stably mounted on the circumferential surface of the yarn storage roller 11 without deformation, and the inner end ring 123a can support the cavity of the cylindrical airbag 12. The thickness of the outer end ring 123b and the outer tube 122 is smaller, which facilitates the outer end ring 123b to deform with the outer tube 122, and the yarn squeezes the air in the cylindrical airbag 12.

[0044] It should be noted that a transition area with a gradual thickness is formed between the inner ring 123a and the outer ring 123b. Figure 5The thickness gradient can be clearly observed, thereby ensuring that the tubular airbag 12 is compressed and deformed when the yarn increases and that the tubular airbag 12 recovers elastically when the yarn decreases, thereby ensuring the structural stability and durability of the tubular airbag 12.

[0045] It should also be noted that, for the sake of safety, in other embodiments, a touch switch is provided on the inner side of the outer tube 122. When the outer tube 122 is excessively squeezed by the yarn, the touch switch is triggered, thereby starting other air paths to supply compressed gas to the cylinder 22, driving the tensioning assembly 20 to tension the yarn, ensuring that when the air path between the tubular airbag 12 and the cylinder 22 fails, the tensioning assembly 20 can still tension the yarn.

[0046] In this embodiment, the outer cylinder 122 is waist-shaped, facilitating yarn winding around the circumferential surface of the outer cylinder 122. A rounded transition ring 124 is disposed between the end outer ring 123b and the outer cylinder 122 to facilitate unwinding of the yarn from the yarn storage roller 11 via the yarn hooking assembly 30, thereby continuously supplying yarn to the downstream winding device 70. It should be noted that the principle of yarn unwinding by the yarn hooking assembly 30 will not be described in detail here.

[0047] Reference Figure 4 In this embodiment, the first motor 13 is disposed at one end of the yarn storage roller 11, and a rotary pipe joint 40 is disposed at the other end of the yarn storage roller 11. The first seat body 21 is fixedly connected to a support 15 for supporting a fixed portion 42. The rotary pipe joint 40 includes a rotating portion 41 and a fixed portion 42 that are rotatably connected. The cylindrical airbag 12 is connected to the air guide tube 14, one end of which is connected to the inner cylinder 121, and the other end of which is connected to the rotating portion 41. The rotary pipe joint 40 and the inner cylinder 121 are arranged to be distributed along the same central axis. The fixed portion 42 is connected to the cylinder body 221 through a pipe. This prevents the rotating yarn storage roller 11 from rotating and entangled in the pipeline between the rotary pipe joint 40 and the cylinder 22. It should be noted that a sealing gasket is disposed between the rotating portion 41 and the fixed portion 42. The rotary pipe joint 40 is an existing component, typically used for gas and liquids such as water and oil, and can withstand high pressure, high temperature, and high speed. Extensive description of this existing component will not be given here.

[0048] Example 2:

[0049] Please refer to Figure 7 A spinning machine includes a drafting device 50, a spinning device 60 and a winding device 70, and the above-mentioned yarn slack eliminating device is also arranged between the spinning device 60 and the winding device 70. Figure 7 Only one group of spinning units in the spinning machine is shown. The spinning machine includes multiple groups of spinning units arranged in parallel.

[0050] It is particularly important to note that the yarn output in the spinning device 60 relies on the tension generated by the rotating yarn storage roller 11. This tension also generates a winding and squeezing force on the yarn storage roller 11, that is, a winding and squeezing force on the cylindrical airbag 12, through the yarn itself. The continuous tension of the yarn between the spinning device 60 and the yarn storage roller 11 is continuously wrapped around the outer cylinder 122 of the cylindrical airbag 12 as the rotating yarn storage roller 11 is continuously wound. The more winding turns, the greater the winding and squeezing force, and the squeezing force on the cylindrical airbag 12. As the number of winding turns decreases, the winding and squeezing force decreases, and the cylindrical airbag 12 recovers under its own elastic action. The present invention cleverly utilizes the changes in the squeezing force of the yarn wrapped around the yarn storage roller 11 to drive the tensioning assembly 20. In particular, when the winding device 70 changes the yarn bobbin or 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 specifically designed to address situations in which the amount of yarn slack changes instantaneously.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A yarn slack eliminating device, characterized in that: It includes a yarn storage component and a tensioning component, and the yarn storage component is equipped with a yarn hanging component; The yarn storage assembly includes a yarn storage roller, a cylindrical air bag, and a first motor for driving the yarn storage roller to rotate. The cylindrical air bag is sleeved on the circumferential surface of the yarn storage roller and is fixedly connected to the yarn storage roller. The tensioning assembly includes a first base 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 air bag is connected to the cylinder body, and the plurality of wire-pulling members are arranged on both sides of the piston rod and are distributed at intervals; the wire-pulling member includes a first connecting rod, a second connecting rod, a third connecting rod, a fan-shaped gear, a gear rod and a wire-pulling wheel, the fan-shaped gear is rotatably connected to the first base body, the fan-shaped gear is meshed with one end of the gear rod, the wire-pulling wheel is rotatably connected to the other end of the gear rod, and the gear rod is slidably connected to the first base body; one end of the first connecting rod is fixedly connected to the piston rod, the other end of the first connecting rod is hingedly connected to one end of the second connecting rod, the other end of the second connecting rod is hingedly connected to one end of the third connecting rod, and the other end of the third connecting rod is fixedly connected to the fan-shaped gear; The piston rod is distributed along the path of the yarn, the sector gear is arranged on one side of the yarn, and the pulling wheel is arranged on the other side of the yarn, with a gap left between the pulling wheel and the yarn; The pulling wheel is fixedly connected to a pair of discs, which are respectively arranged at both ends of the pulling wheel; a C-shaped ring groove is formed between the pair of discs and the pulling wheel; the C-shaped ring grooves are staggered on both sides of the yarn; the cylindrical airbag is configured to be made of rubber material, and the cylindrical airbag includes an inner tube, an outer tube and an end ring connecting the inner tube and the outer tube, the end ring includes an inner end ring and an outer end ring connected, the inner end ring is fixedly connected to the inner tube, and the outer end ring is fixedly connected to the outer tube, and the thickness of the inner end ring and the inner tube is greater than the thickness of the outer end ring and the outer tube.

2. The yarn slack eliminating device according to claim 1, characterized in that: The first connecting rod and the gear rod are respectively distributed perpendicularly to the piston rod.

3. The yarn slack eliminating device according to claim 2, characterized in that: The outer cylinder is in a waist-shaped cylinder, and a rounded transition ring is arranged between the end outer ring and the outer cylinder.

4. The yarn slack eliminating device according to claim 3, characterized in that: The first motor is arranged at one end of the yarn accumulation roller, and the other end of the yarn accumulation roller is arranged with a rotary tube joint, and the rotary tube joint includes a rotating part and a fixed part that are rotatably connected. The cylindrical airbag is connected with an air guide tube, one end of the air guide tube is connected with the inner tube, and the other end of the air guide tube is connected with the rotating part; the rotary tube joint and the inner tube are arranged to be distributed along the same central axis; the fixed part is connected with the cylinder pipe.

5. The yarn slack eliminating device according to claim 4, characterized in that: The first seat body is fixedly connected with a support for supporting the fixing portion.

6. A spinning machine comprising a drafting device, a spinning device and a winding device, It is characterized in that A yarn slack eliminating device according to any one of claims 1 to 5 is further arranged between the spinning device and the winding device.

Images