A yarn holding force control device and control method

Abstract

This invention provides a yarn holding force control device and method, including an upper yarn guide plate, a lower yarn guide plate, a yarn holding force adjustment device, and a controller. The yarn holding force adjustment device comprises at least one yarn holding force adjustment unit, an actuating rotary element, and a mounting frame. The yarn holding force adjustment unit is located on the mounting frame between the upper and lower yarn guide plates and includes a rotating shaft, a turntable, and a yarn holding assembly. The actuating rotary element and the rotating shaft are respectively disposed on both sides of the mounting frame. The actuating rotary element is connected to one end of the rotating shaft, and the turntable is disposed on the other end of the rotating shaft. The yarn holding assembly forms a zigzag yarn path with an adjustable bending angle on the turntable and the mounting frame. The controller controls the actuating rotary element to drive the rotating shaft and the turntable to rotate, automatically adjusting the yarn holding force passing through the zigzag yarn path. This ensures stable control of the yarn during high-speed winding and features a simple structure that is easy to maintain.

Description

Technical Field

[0001] This invention belongs to the field of textile machinery manufacturing technology, and relates to the improvement of automatic winding machines, specifically a yarn holding force control device and control method. Background Technology

[0002] During the winding process of an automatic winder, from the unwinding of the yarn tube to the formation of the yarn cone, it is necessary to control the tension in real time to maintain a suitable and stable value. This ensures good yarn cone formation and uniform yarn cone density, and the tension device of the winder plays a crucial role. Currently, the mainstream tension-applying mechanisms of automatic winders are mainly of two types: disc tension and grid tension. The disc tension device, usually called a tension disc, applies tension to the running yarn. Due to the characteristics of its tension-applying principle, the disc tension can increase the average value without amplifying the variance of tension fluctuations during the winding process, thus reducing the relative value of yarn tension differences. However, when yarn splices, impurities, or thick sections pass between the tension discs, they will cause the tension discs to impact and jump, generating new dynamic tension fluctuations and increasing the amplitude of tension fluctuations. The faster the yarn guide speed, the greater the fluctuation amplitude. With the continuous increase in winding speed, higher requirements are placed on the performance of the automatic winder's additional tension device in controlling dynamic tension fluctuations.

[0003] How to design a yarn holding force control device and method that can effectively control the additional tension generated by applying pressure to the yarn, thereby ensuring a stable winding tension of the output yarn, and also having good shock absorption properties for sudden unexpected fluctuations in the yarn, while ensuring stable control of the yarn during high-speed winding, and with a simple structure and easy maintenance, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] To address the problems and shortcomings of existing technologies, this invention provides a yarn holding force control device and method that can effectively control the additional tension generated by applying pressure to the yarn, thereby ensuring stable winding tension of the output yarn. It also has good shock absorption for sudden unexpected fluctuations in the yarn, while ensuring stable control of the yarn during high-speed winding. Furthermore, it has a simple structure and is easy to maintain.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A yarn holding force control device includes an upper yarn guide plate, a lower yarn guide plate, a yarn holding force adjustment device, and a controller. The upper yarn guide plate has an upper yarn guide groove, and the lower yarn guide plate has a lower yarn guide groove. The yarn holding force adjustment device includes at least one yarn holding force adjustment unit, an actuating rotary element, and a mounting frame. The actuating rotary element is connected to the controller. The yarn holding force adjustment unit is located on the mounting frame between the upper and lower yarn guide plates. The device includes a rotating shaft, a turntable, and a yarn holding assembly. The actuating rotating element and the rotating shaft are respectively disposed on both sides of the mounting frame. The actuating rotating element is connected to one end of the rotating shaft through a connecting component. The turntable is disposed on the other end of the rotating shaft. The yarn holding assembly forms a zigzag yarn path with an adjustable bending angle on the turntable and the mounting frame. The controller controls the actuating rotating element to drive the rotating shaft and the turntable to rotate, automatically adjusting the yarn holding force passing through the zigzag yarn path to ensure stable control of the yarn during high-speed winding.

[0007] Improvements to the above technical solution: The yarn holding assembly includes tension bar I, tension bar II, magnet, sensor I, and sensor II. Sensor I and sensor II are respectively connected to the controller. Tension bar I and tension bar II are symmetrically arranged on the edge of the turntable. Each tension bar I and tension bar II is provided with a ceramic rod. A yarn guiding annular groove is provided on the outer surface of the ceramic rod. The magnet is provided on the edge of the turntable between tension bar I and tension bar II. The position of the magnet when the turntable is in the initial avoidance position is corresponding to the position of sensor I on the mounting frame. The position of the magnet when the turntable is in the maximum set rotation angle is corresponding to the position of sensor II on the mounting frame.

[0008] Further improvements to the above technical solution: The yarn gripping force adjustment unit further includes a flexible rotary transmission component, which is installed in the middle of the mounting frame. The actuating rotary element is connected to the power input end of the flexible rotary transmission component, and the power output end of the flexible rotary transmission component is connected to one end of the rotating shaft. The flexible rotary transmission component has the ability to absorb sudden unexpected fluctuations in the yarn.

[0009] Further improvements to the above technical solution: The flexible rotary transmission assembly includes a flexible driven disk, a flexible transmission disk, and a transmission disk shaft. The flexible driven disk is fixed coaxially with the turntable. The flexible transmission disk and the transmission disk shaft, which are integral with the flexible transmission disk, are coaxially assembled with the flexible driven disk. The flexible driven disk and the flexible transmission disk form a flexible connection. The transmission disk shaft is powered by the actuating rotary element.

[0010] Further improvement to the above technical solution: The yarn holding force adjustment device includes two sets of yarn holding force adjustment units arranged vertically, one set of the yarn holding force adjustment units is located directly below the upper yarn guide plate, and the other set of the yarn holding force adjustment units is located directly above the lower yarn guide plate. The two sets of yarn holding force adjustment units are mounted on the mounting frame and powered by the same actuating rotary element.

[0011] The first specific improvement to the above technical solution: The yarn holding force adjustment device includes two sets of yarn holding force adjustment units, and is powered by one actuating rotary element. Each set of yarn holding force adjustment units also includes a flexible rotary transmission assembly. The flexible rotary transmission assembly is disposed in the mounting frame and includes a flexible driven disk, a flexible sleeve, a flexible transmission disk, and a transmission disk shaft. The disk is disposed on one side of the mounting frame. The shaft connected to the disk extends into the mounting frame and is connected to one side of the flexible driven disk. The other side of the flexible driven disk is flexibly connected to one side of the flexible transmission disk through the flexible sleeve. The transmission disk shaft disposed on the other side of the flexible transmission disk is rotatably connected to the mounting frame. The actuating rotary element is mounted on the other side of the mounting frame. Transmission teeth are disposed around the periphery of the flexible transmission disk. A transmission gear is mounted on the output shaft of the actuating rotary element. The transmission gear meshes with the transmission teeth on the two flexible transmission disks.

[0012] A second specific improvement to the above technical solution: The yarn holding force adjustment device includes a yarn holding force adjustment unit actively driven by the actuating rotary element and a driven yarn holding force adjustment unit. The flexible rotary transmission assembly in the yarn holding force adjustment unit actively driven by the actuating rotary element is located in the upper part of the mounting frame, including a flexible driven disc, a flexible sleeve, a flexible transmission disc, and a transmission disc shaft. The disc is located on one side of the mounting frame, and the shaft connected to the disc extends into the mounting frame and is connected to one side of the flexible driven disc. The other side of the flexible driven disc is flexibly connected to one side of the flexible transmission disc through the flexible sleeve. The transmission disk shaft on the other side of the transmission disk is rotatably connected to the mounting frame. The actuating rotary element is mounted on the other side of the mounting frame, and the output shaft of the actuating rotary element is connected to the transmission disk shaft. The flexible rotary transmission component in the driven yarn holding force adjustment unit is located in the lower part of the mounting frame, including a pull rod turntable and a connecting rod. The turntable is located on one side of the mounting frame, and the rotating shaft connected to the turntable extends into the mounting frame. The pull rod turntable is mounted on the rotating shaft extending into the mounting frame. The pull rod turntable is connected to the flexible sleeve in the yarn holding force adjustment unit, which is actively driven by the actuating rotary element, through the connecting rod, forming a parallel four-bar linkage transmission mechanism.

[0013] A third specific improvement to the above technical solution: The yarn holding force adjustment device includes two sets of yarn holding force adjustment units, all powered by one actuating rotary element. Each yarn holding force adjustment unit also includes a flexible rotary transmission assembly. The flexible rotary transmission assembly is located within the mounting frame and includes a flexible driven disk, a vibration-absorbing spring, a flexible transmission disk, and a transmission disk shaft. The disk is located on one side of the mounting frame. The shaft connected to the disk extends into the mounting frame and connects to one side of the flexible driven disk. Spring fixing posts are respectively installed on the opposite sides of the flexible driven disk and the flexible transmission disk. At least two vibration-absorbing springs are connected at both ends to the spring fixing posts on the flexible driven disk and the flexible transmission disk to achieve flexible connection. The transmission disk shaft located on the other side of the flexible transmission disk is rotatably connected to the mounting frame. The actuating rotary element is installed on the other side of the mounting frame. Transmission teeth are arranged around the flexible transmission disk. A transmission gear is installed on the output shaft of the actuating rotary element. The transmission gear meshes with the transmission teeth on the two flexible transmission disks.

[0014] The present invention provides a control method for the above-mentioned yarn holding force control device, characterized in that the control method includes the following steps:

[0015] Step 1: Draw the yarn from the bobbin and pass it through the lower guide groove on the lower guide plate, the tortuous yarn path formed by the yarn holding component, the upper guide groove on the upper guide plate, and then connect it to the bobbin. The initial avoidance position of the tortuous yarn path, the yarn passing through the flexible tortuous yarn path is straight.

[0016] Step 2: When the yarn unwinding begins, the yarn is unwound from the bobbin and wound onto the yarn tube. At this time, the yarn has formed a certain tension. The controller controls the actuation rotating element to drive the rotating shaft and turntable to rotate, so that the yarn passing through the tortuous yarn path is in a zigzag shape and the yarn is clamped, effectively controlling the additional tension generated by applying pressure to the yarn.

[0017] Step 3: When the yarn experiences sudden unexpected fluctuations, the controller controls the actuation rotary element to drive the shaft and turntable to increase the rotation angle, ensuring stable winding tension of the output yarn.

[0018] Improvement to the above technical solution: In step 1 above, the yarn is straight when passing through the tortuous yarn path and passes through the center of the turntable. The tortuous yarn path is in the initial avoidance position. Tension bar I and tension bar II are located on both sides of the yarn. The magnet on the turntable coincides with the position of sensor I, and sensor II is close to tension bar II.

[0019] In step 2 above, when the yarn unwinding begins, the controller controls the actuation rotary element to drive the turntable to rotate at a suitable angle. Tension rods I and II move closer to the yarn, causing the yarn to embed into the annular grooves of the ceramic rods on tension rods I and II, restricting the yarn's front-to-back position. This makes the yarn, after passing through the zigzag yarn path, appear as a zigzag line, and the zigzag yarn path is in the working position, providing the necessary gripping force for the yarn. Simultaneously, in conjunction with the tension sensor on the yarn path, the controller receives real-time feedback on the yarn tension value. Based on the real-time yarn tension, the actuation rotary element rotates at a corresponding angle, thereby adjusting the yarn tension during high-speed winding in real time and reducing yarn tension fluctuations. The larger the rotation angle of the turntable driven by the actuation rotary element, the greater the clamping force on the yarn. When the magnet approaches sensor II, the turntable reaches its maximum rotation angle, restricting the yarn's left-to-right position. When the yarn is cut, the zigzag yarn path returns to the initial avoidance position, and tension rods I and II return to the predetermined initial position, facilitating subsequent up-and-down head finding and splicing operations.

[0020] Compared with the prior art, the present invention has the following advantages and positive effects:

[0021] This invention effectively controls the additional tension generated by applying pressure to the yarn, thereby ensuring a stable winding tension of the output yarn. This device also has excellent shock absorption capabilities against sudden unexpected fluctuations in the yarn. Simultaneously, this tension-adding device can limit the yarn's movement left and right, as well as front and back, ensuring stable control of the yarn during high-speed winding. Furthermore, its structure is simple and easy to maintain. This invention eliminates the need for opening and closing actions required in existing technologies, ensuring both yarn feeding and pressure functions. Moreover, when high gripping force is required, multiple units can be combined for pressure application, increasing the maximum additional tension applied to the yarn. Attached Figure Description

[0022] Figure 1 This is a side view of the yarn holding force adjustment unit in a yarn holding force control device according to the present invention;

[0023] Figure 2 This is a schematic diagram of the inner side of the initial position turntable of the yarn holding force adjustment unit in the yarn holding force control device of the present invention;

[0024] Figure 3 This is a schematic diagram of the inner side of the turntable of the yarn holding force adjustment unit in the yarn holding force control device of the present invention during the yarn unwinding process;

[0025] Figure 4 This is a front view of the overall structure of a yarn holding force control device according to the present invention;

[0026] Figure 5 This is a schematic diagram of a yarn holding force control device according to the present invention, which includes two sets of yarn holding force adjustment units.

[0027] Figure 6 This is a schematic diagram of a yarn holding force control device according to the present invention, which includes two sets of yarn holding force adjustment units.

[0028] In the diagram: 1. Upper yarn guide plate; 1.1. Upper yarn guide groove; 2. Lower yarn guide plate; 2.1. Lower yarn guide groove; 3. Tension bar II; 4. Sensor II; 5. Sensor I; 6. Magnet; 7. Tension bar I; 8. Rotating shaft; 9. Turntable; 10. Yarn; 11. Ceramic rod; 12. Mounting bracket; 13. Flexible driven disc; 14. Flexible sleeve; 15. Flexible transmission disc; 16. Transmission disc rotating shaft; 17. Actuation rotation element; 18. Transmission gear; 19. Connecting rod; 20. Pull rod turntable; 21. Vibration-absorbing spring; 22. Spring fixing post. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] See Figures 1-6 An embodiment of the yarn holding force control device of the present invention includes an upper yarn guide plate 1, a lower yarn guide plate 2, a yarn holding force adjustment device, and a controller. An upper yarn guide groove 1.1 is provided on the upper yarn guide plate 1, and a lower yarn guide groove 2.1 is provided on the lower yarn guide plate 2. The yarn holding force adjustment device includes at least one yarn holding force adjustment unit, an actuating rotary element 17, and a mounting frame 12. The actuating rotary element 17 is connected to the controller. The yarn holding force adjustment unit is located on the mounting frame 12 between the upper yarn guide plate 1 and the lower yarn guide plate 2. The yarn holding force adjustment unit includes a rotating shaft 8, a turntable 9, and a yarn holding assembly. The actuating rotary element 17 and the rotating shaft 8 are respectively disposed on both sides of the mounting frame 12. The actuating rotary element 17 is connected to one end of the rotating shaft 8 via a connecting component, and the turntable 9 is disposed on the other end of the rotating shaft 8. The aforementioned yarn holding assembly forms an adjustable zigzag yarn path on the turntable 9 and mounting frame 12 (specifically, the actuating rotary element 17 drives two ceramic rods 11 to rotate with the turntable 9, and they are misaligned with the yarn guide points of the upper yarn guide groove 1.1 and the lower yarn guide groove 2.1). The controller controls the actuating rotary element 17 to drive the rotating shaft 8 and the turntable 9 to rotate, automatically adjusting the holding force of the yarn 10 passing through the zigzag yarn path to ensure stable control of the yarn 10 during high-speed winding.

[0031] Specifically: The aforementioned yarn holding assembly includes tension bar I7, tension bar II3, magnet 6, sensor I5, and sensor II4, with sensor I5 and sensor II4 respectively connected to the controller. Tension bars I7 and II3 are symmetrically arranged on the edge of the turntable 9. Each tension bar I7 and II3 is equipped with a ceramic rod 11 (facilitating yarn 10 introduction), and a yarn-guiding annular groove is provided on the outer surface of the ceramic rod 11. Magnet 6 is installed on the edge of the turntable 9 between tension bars I7 and II3, corresponding to the position of magnet 6 when the turntable 9 is initially in the avoidance position (e.g., ...). Figure 1 As shown), sensor I5 is installed on the mounting bracket 12 to correspond to the position of magnet 6 when the turntable 9 rotates to its maximum set angle (as shown). Figure 2 As shown, sensor II4 is installed on the mounting bracket 12 to prevent the turntable 9 from rotating too much and being damaged when the yarn breaks or when there is an incorrect command.

[0032] Furthermore, the aforementioned yarn gripping force adjustment unit also includes a flexible rotary transmission assembly, which is installed in the middle of the mounting frame 12. The actuating rotary element is connected to the power input end of the flexible rotary transmission assembly, and the power output end of the flexible rotary transmission assembly is connected to one end of the rotating shaft 8. The controller controls the actuating rotary element 17 to drive the rotating shaft 8 and the turntable 9 to rotate through the flexible rotary transmission assembly, automatically adjusting the yarn gripping force as it passes through the tortuous yarn path, ensuring stable control of the yarn during high-speed winding, and absorbing the impact of sudden unexpected fluctuations in the yarn.

[0033] Furthermore, the aforementioned flexible rotary transmission assembly includes a flexible driven disk 13, a flexible transmission disk 15, and a transmission disk shaft 16. The flexible driven disk 13 is coaxially fixed with the turntable 9, and the flexible transmission disk 15 and the transmission disk shaft 16, which are integrally mounted with the flexible transmission disk 15, are coaxially mounted with the flexible driven disk 13. The flexible driven disk 13 and the flexible transmission disk 15 form a flexible connection, and the transmission disk shaft 16 is powered by an actuating rotary element 17. The flexible driven disk 13 and the flexible transmission disk 15 can be flexibly connected via a rubber structure or a spring-like mechanism. This is mainly used to dampen and buffer when the tension of the yarn 10 changes abruptly.

[0034] Furthermore, such as Figure 3As shown, the yarn holding force adjustment device includes two sets of yarn holding force adjustment units arranged vertically. One set of the yarn holding force adjustment units is located directly below the upper yarn guide plate 1, and the other set is located directly above the lower yarn guide plate 2. Both sets of yarn holding force adjustment units are mounted on the mounting frame 12 and powered by the same actuating rotary element 17. In this way, the two sets of yarn holding force adjustment units are connected in series, forming a longer, more zigzag yarn path, which increases the clamping force on the yarn 10 to meet the needs of actual production. Since the rotation angle of the turntable 9 is too large when using only one set of yarn holding force adjustment units, two or more sets are used (due to space constraints), allowing for a smaller rotation angle and multiple zigzag angles.

[0035] In practical implementation, the above-mentioned yarn holding force adjustment device can adopt the following specific solutions:

[0036] The first specific implementation scheme of the above-mentioned yarn holding force adjustment device is as follows: Figure 4 As shown, the yarn holding force adjustment device includes two sets of yarn holding force adjustment units, all powered by a single actuating rotary element 17. Each yarn holding force adjustment unit also includes a flexible rotary transmission assembly, which is housed within the mounting frame 12. The flexible rotary transmission assembly includes a flexible driven disk 13, a flexible sleeve 14, a flexible transmission disk 15, and a transmission disk shaft 16. The turntable 9 is located on one side of the mounting frame 12, and the shaft 8 connected to the turntable 9 extends into the mounting frame 12 and connects to one side of the flexible driven disk 13. The other side of the flexible driven disk 13 is flexibly connected to one side of the flexible transmission disk 15 via the flexible sleeve 14. The transmission disk shaft 16 located on the other side of the flexible transmission disk 15 is rotatably connected to the mounting frame 12, and the actuating rotary element 17 is mounted on the other side of the mounting frame 12. The flexible transmission disk 15 is provided with transmission teeth around its periphery, and a transmission gear 18 is installed on the output shaft of the actuating rotary element 17. The transmission gear 18 meshes with the transmission teeth on the flexible transmission disks 15 in the two sets of yarn holding force adjustment units. In order to save space and cost, the transmission gear 18 of one actuating rotary element 17 meshes with the transmission teeth on the two upper and lower flexible transmission disks 15 at the same time, and the two flexible transmission disks 15 rotate in the same direction.

[0037] The second specific implementation scheme of the above-mentioned yarn holding force adjustment device is as follows: Figure 5As shown, the yarn holding force adjustment device includes a yarn holding force adjustment unit actively driven by an actuating rotary element 17 and a driven yarn holding force adjustment unit. The flexible rotary transmission component in the yarn holding force adjustment unit actively driven by the actuating rotary element 17 is disposed in the upper part of the mounting frame 12. The flexible rotary transmission component includes a flexible driven disk 13, a flexible sleeve 14, a flexible transmission disk 15, and a transmission disk shaft 16. The disk 9 is disposed on one side of the mounting frame 12. The shaft 8 connected to the disk 9 extends into the mounting frame 12 and is connected to one side of the flexible driven disk 13. The other side of the flexible driven disk 13 is flexibly connected to one side of the flexible transmission disk 15 through the flexible sleeve 14. The transmission disk shaft 16 disposed on the other side of the flexible transmission disk 15 is rotatably connected to the mounting frame 12. The actuating rotary element 17 is mounted on the other side of the mounting frame 12, and the output shaft of the actuating rotary element 17 is connected to the transmission disk shaft 16. The flexible rotary transmission component in the driven yarn gripping force adjustment unit is located in the lower part of the mounting frame 12, including a pull rod turntable 20 and a connecting rod 19. The turntable 9 is located on one side of the mounting frame 12, and the rotating shaft 8 connected to the turntable 9 extends into the mounting frame 12. The pull rod turntable 20 is installed on the rotating shaft 8 extending into the mounting frame 12. The pull rod turntable 20 is connected to the flexible sleeve 14 in the yarn gripping force adjustment unit, which is actively driven by the actuating rotary element 17, through the connecting rod 19, forming a parallel four-bar linkage transmission mechanism.

[0038] The third specific implementation scheme of the above-mentioned yarn holding force adjustment device: such as Figure 6 As shown, the yarn holding force adjustment device includes two sets of yarn holding force adjustment units, all powered by the actuating rotary element 17. Each yarn holding force adjustment unit also includes a flexible rotary transmission assembly, which is housed within the mounting frame 12. The flexible rotary transmission assembly includes a flexible driven disk 13, a vibration-absorbing spring 21, a flexible transmission disk 15, and a transmission disk shaft 16. The turntable 9 is located on one side of the mounting frame 12. The shaft 8 connected to the turntable 9 extends into the mounting frame 12 and connects to one side of the flexible driven disk 13. Spring fixing posts 22 are respectively installed on the opposite sides of the flexible driven disk 13 and the flexible transmission disk 15. At least two vibration-absorbing springs 21 are connected at both ends to the spring fixing posts 22 on the flexible driven disk 13 and the flexible transmission disk 15 to achieve a flexible connection. The drive disc shaft 16 on the other side of the flexible drive disc 15 is rotatably connected to the mounting frame 12. The actuating rotary element 17 is installed on the other side of the mounting frame 12. The flexible drive disc 15 is provided with drive teeth around its periphery. The drive gear 18 is installed on the output shaft of the actuating rotary element 17 and meshes with the drive teeth on the flexible drive disc 15 in the two yarn holding force adjustment units respectively.

[0039] Preferably, the aforementioned actuating rotary element 17 is a stepper motor or a rotary drive component with similar function.

[0040] The main innovative points protected by this invention are as follows: 1. The yarn holding force adjustment unit includes a rotating shaft 8, a turntable 9, and two ceramic rods 11 symmetrically arranged on the turntable 9 to control the yarn. The ceramic rods 11 are used to resist wear when holding the yarn 10. The two ceramic rods 11 arranged in the front-to-back direction are for easy feeding of the yarn 10. The turntable 9 is driven to rotate forward or backward by the actuating rotary element 17. 2. To prevent the yarn 10 from jumping back and forth along the cylindrical surface during holding, there is a yarn guiding annular groove on the cylindrical surface of the ceramic rod 11, so that the yarn 10 is exactly in the yarn guiding annular groove in the front-to-back direction, blocking its back-to-back trajectory movement. 3. The rotating shaft 8 of the yarn holding force adjustment unit is connected to the actuating rotary element 17 through a flexible rotary connection assembly. The flexible rotary connection assembly is equivalent to an elastic coupling, which can absorb tension fluctuations such as sudden changes.

[0041] The working principle of this invention: In the initial avoidance position (default initial position, when magnet 6 and sensor I5 sense each other), the two ceramic rods 11 are located on both sides of the central axis of the winding yarn path to clear the yarn path, so that the yarn 10 can be easily fed in without additional action when knotting (unlike the tension plate, which requires additional action to open before the yarn can be fed in and then clamped). After the yarn is fed in, the yarn 10 forms a certain straight line under the upper and lower tension. Then, the actuating rotary element 17 drives the flexible rotary transmission component to rotate the turntable 9 clockwise by a certain angle (this angle is determined by the actuating rotary element 17 according to the tension required by the spun yarn 10, so that the two ceramic rods 11 form a certain zigzag line with the upper yarn guide groove 1.1 and the lower yarn guide groove 2.1 (equivalent to the upper ceramic rod 11 pressing to the right and the lower ceramic rod 11 pressing to the left when the yarn 10 is stretched vertically), thereby increasing the tension of the yarn 10 and applying pressure. As the rotation angle increases, the yarn 10 becomes more zigzag, the encirclement angle of the yarn 10 at each yarn guide point is larger, the frictional resistance is greater, and the holding force of the yarn 10 is increased. Conversely, reversing the rotation can correspondingly reduce the holding force of the yarn 10. The system employs a tension sensor along the yarn path to provide real-time feedback of the yarn tension value to the controller. The controller compares the real-time yarn tension with a preset tension value from the host computer. If the tension exceeds the preset range, the controller sends a signal, which is amplified and transmitted to the actuating rotary element 17, causing it to rotate at a corresponding angle to control the tension of the yarn 10 in real time. When the yarn 10 is cut or accidentally breaks, the controller issues a command, causing the actuating rotary element 17 to quickly reverse to its initial avoidance position (when it rotates to a certain angle, the magnet 6 on the turntable 9 triggers sensor I5 to stop the rotation of the actuating rotary element 17; to prevent over-rotation, a sensor II4 is also triggered at the maximum rotation angle of the turntable 9 for limit control), allowing the yarn 10 to be pulled in and repressurized.

[0042] In the flexible rotary transmission assembly of the present invention, the flexible driven disk 13 and the flexible transmission disk 15 are connected by means of flexibility (such as rubber) and elasticity (such as spring) to absorb tension fluctuations and mechanical vibrations during the operation of the yarn 10.

[0043] See Figures 1-6 An embodiment of the control method for the above-mentioned yarn holding force control device of the present invention includes the following steps:

[0044] Step 1: Lead the yarn 10 out of the bobbin and through the lower guide groove 2.1 on the lower guide plate 2, the tortuous yarn path formed by the yarn holding assembly, the upper guide groove 1.1 on the upper guide plate 1, and then connect it to the bobbin. The initial avoidance position of the tortuous yarn path, the yarn 10 after passing through the flexible tortuous yarn path is straight.

[0045] Step 2: When the unwinding of yarn 10 begins, yarn 10 is unwound from the bobbin and wound onto the yarn tube. At this time, the yarn has formed a certain tension. The controller controls the actuation rotating element 17 to drive the rotating shaft 8 and the turntable 9 to rotate, so that the yarn 10, which has passed through the tortuous yarn path, is in a zigzag shape and the yarn is clamped, effectively controlling the additional tension generated by applying pressure to the yarn 10.

[0046] Step 3: When the yarn 10 experiences sudden unexpected fluctuations, the controller controls the actuation rotary element 17 to drive the rotating shaft 8 and turntable 9 to increase or decrease the rotation angle, ensuring stable winding tension of the output yarn 10.

[0047] Improvement to the above technical solution: In step 1 above, when the yarn 10 passes through the tortuous yarn path, it is in a straight line and passes through the center of the turntable 9. The tortuous yarn path is in the initial avoidance position. Tension bar I7 and tension bar II3 are located on both sides of the yarn 10, respectively. The magnet 6 on the turntable 9 coincides with the position of sensor I5, and sensor II4 is close to tension bar II3.

[0048] In step 2 above, when the yarn unwinding begins, the controller controls the actuation rotating element 17 to drive the turntable 9 to rotate at a suitable angle. Tension rods I7 and II3 move closer to the yarn, causing the yarn 10 to embed into the yarn-guiding annular grooves of the ceramic rods 11 on tension rods I7 and II3, restricting the front-to-back position of the yarn 10. This causes the yarn 10, after passing through the tortuous yarn path, to be in a zigzag shape. The tortuous yarn path is in the working position, providing the required holding force for the yarn 10. Simultaneously, in conjunction with the tension sensor on the yarn path, the yarn tension value is fed back to the controller in real time, and the controller adjusts the tension according to the yarn tension. The real-time tension of yarn 10 causes the actuating rotary element 17 to rotate by a corresponding angle, thereby adjusting the tension of yarn 10 in real time during high-speed winding and reducing tension fluctuations. The larger the rotation angle of the turntable 9 driven by the actuating rotary element 17, the greater the clamping force on the yarn. When the magnet 6 approaches the sensor II4, the turntable 9 reaches the maximum rotation angle, limiting the left and right position of the yarn 10. When the yarn 10 is cut, the tortuous yarn path returns to the initial avoidance position, and the tension rod I7 and tension rod II3 return to the predetermined initial position, facilitating subsequent up and down head finding and splicing operations.

[0049] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A yarn holding force control device, comprising an upper yarn guide plate, a lower yarn guide plate, a yarn holding force adjustment device, and a controller, wherein the upper yarn guide plate is provided with an upper yarn guide groove, and the lower yarn guide plate is provided with a lower yarn guide groove, characterized in that, The yarn holding force adjustment device includes at least one yarn holding force adjustment unit, an actuating rotary element, and a mounting frame. The actuating rotary element is connected to the controller. The yarn holding force adjustment unit is located on the mounting frame between the upper yarn guide plate and the lower yarn guide plate. The yarn holding force adjustment unit includes a rotating shaft, a turntable, and a yarn holding assembly. The actuating rotary element and the rotating shaft are respectively disposed on both sides of the mounting frame. The actuating rotary element is connected to one end of the rotating shaft through a connecting component. The turntable is disposed on the other end of the rotating shaft. The yarn holding assembly forms a zigzag yarn path with an adjustable bending angle on the turntable and the mounting frame. The controller controls the actuating rotary element to drive the rotating shaft and the turntable to rotate, automatically adjusting the yarn holding force passing through the zigzag yarn path to ensure high speed. The yarn holding force adjustment unit also includes a flexible rotary transmission assembly, which is installed in the middle of the mounting frame. The actuating rotary element is connected to the power input end of the flexible rotary transmission assembly, and the power output end of the flexible rotary transmission assembly is connected to one end of the rotating shaft. The flexible rotary transmission assembly has shock absorption capabilities for sudden unexpected fluctuations in the yarn. The flexible rotary transmission assembly includes a flexible driven disk, a flexible transmission disk, and a transmission disk shaft. The flexible driven disk is fixed coaxially with the rotating disk. The flexible transmission disk and the transmission disk shaft, which are integrated with the flexible transmission disk, are coaxially assembled with the flexible driven disk. The flexible driven disk and the flexible transmission disk form a flexible connection. The transmission disk shaft is powered by the actuating rotary element.

2. The yarn holding force control device according to claim 1, wherein the yarn holding assembly includes tension bar I, tension bar II, magnet, sensor I, and sensor II, sensor I and sensor II are respectively connected to the controller, tension bar I and tension bar II are symmetrically arranged on the edge of the turntable, each tension bar I and tension bar II is provided with a ceramic rod, and a yarn guiding annular groove is provided on the outer surface of the ceramic rod, the magnet is provided on the edge of the turntable between tension bar I and tension bar II, the position of the magnet corresponding to the initial avoidance position of the turntable is corresponding to the position of the magnet on the mounting frame, and the position of the magnet corresponding to the maximum set rotation angle of the turntable is corresponding to the position of the magnet on the mounting frame.

3. The yarn holding force control device according to claim 1 or 2, characterized in that, The yarn holding force adjustment device includes two sets of yarn holding force adjustment units arranged vertically. One set of the yarn holding force adjustment units is located directly below the upper yarn guide plate, and the other set of the yarn holding force adjustment units is located directly above the lower yarn guide plate. The two sets of yarn holding force adjustment units are mounted on the mounting frame and powered by the same actuating rotary element.

4. The yarn holding force control device according to claim 1 or 2, characterized in that, The yarn holding force adjustment device includes two sets of yarn holding force adjustment units, all powered by the actuating rotary element. Each yarn holding force adjustment unit also includes a flexible rotary transmission assembly. The flexible rotary transmission assembly is located within the mounting frame and includes a flexible driven disk, a flexible sleeve, a flexible transmission disk, and a transmission disk shaft. The disk is located on one side of the mounting frame, and the shaft connected to the disk extends into the mounting frame and is connected to one side of the flexible driven disk. The other side of the flexible driven disk is flexibly connected to one side of the flexible transmission disk via the flexible sleeve. The transmission disk shaft located on the other side of the flexible transmission disk is rotatably connected to the mounting frame. The actuating rotary element is mounted on the other side of the mounting frame. Transmission teeth are arranged around the periphery of the flexible transmission disk, and a transmission gear is mounted on the output shaft of the actuating rotary element. The transmission gear meshes with the transmission teeth on the two flexible transmission disks.

5. The yarn holding force control device according to claim 1 or 2, characterized in that, The yarn holding force adjustment device includes a yarn holding force adjustment unit actively driven by the actuating rotary element and a driven yarn holding force adjustment unit. The flexible rotary transmission assembly in the yarn holding force adjustment unit actively driven by the actuating rotary element is located in the upper part of the mounting frame, including a flexible driven disc, a flexible sleeve, a flexible transmission disc, and a transmission disc shaft. The disc is located on one side of the mounting frame, and the shaft connected to the disc extends into the mounting frame and is connected to one side of the flexible driven disc. The other side of the flexible driven disc is flexibly connected to one side of the flexible transmission disc via the flexible sleeve. The other side of the flexible transmission disc is provided with… The transmission disc shaft is rotatably connected to the mounting frame. The actuating rotary element is mounted on the other side of the mounting frame, and the output shaft of the actuating rotary element is connected to the transmission disc shaft. The flexible rotary transmission component in the driven yarn holding force adjustment unit is located in the lower part of the mounting frame, including a pull rod turntable and a connecting rod. The turntable is located on one side of the mounting frame, and the rotating shaft connected to the turntable extends into the mounting frame. The pull rod turntable is mounted on the rotating shaft extending into the mounting frame. The pull rod turntable is connected to the flexible sleeve in the yarn holding force adjustment unit, which is actively driven by the actuating rotary element, through the connecting rod, forming a parallel four-bar linkage transmission mechanism.

6. The yarn holding force control device according to claim 1 or 2, characterized in that, The yarn holding force adjustment device includes two sets of yarn holding force adjustment units, all powered by the actuating rotary element. Each yarn holding force adjustment unit also includes a flexible rotary transmission assembly. The flexible rotary transmission assembly is located within the mounting frame and includes a flexible driven disk, a vibration-absorbing spring, a flexible transmission disk, and a transmission disk shaft. The disk is located on one side of the mounting frame, and the shaft connected to the disk extends into the mounting frame and connects to one side of the flexible driven disk. Spring fixing posts are respectively installed on the opposite sides of the flexible driven disk and the flexible transmission disk. At least two vibration-absorbing springs are connected at both ends to the spring fixing posts on the flexible driven disk and the flexible transmission disk to achieve flexible connection. The transmission disk shaft located on the other side of the flexible transmission disk is rotatably connected to the mounting frame. The actuating rotary element is installed on the other side of the mounting frame. Transmission teeth are arranged around the periphery of the flexible transmission disk, and a transmission gear is installed on the output shaft of the actuating rotary element. The transmission gear meshes with the transmission teeth on the flexible transmission disk.

7. A control method for a yarn holding force control device as described in any one of claims 1, 3-6, characterized in that, The control method includes the following steps: Step 1: Draw the yarn from the bobbin and pass it through the lower guide groove on the lower guide plate, the tortuous yarn path formed by the yarn holding component, the upper guide groove on the upper guide plate, and then connect it to the bobbin. The initial avoidance position of the tortuous yarn path, the yarn passing through the flexible tortuous yarn path is straight. Step 2: When the yarn unwinding begins, the yarn is unwound from the bobbin and wound onto the yarn tube. At this time, the yarn has formed a certain tension. The controller controls the actuation rotating element to drive the rotating shaft and turntable to rotate, so that the yarn passing through the tortuous yarn path is in a zigzag shape and the yarn is clamped, effectively controlling the additional tension generated by applying pressure to the yarn. Step 3: When the yarn experiences sudden unexpected fluctuations, the controller controls the actuation rotary element to drive the shaft and turntable to increase or decrease the rotation angle, ensuring stable winding tension of the output yarn.

8. A control method for a yarn holding force control device as described in claim 2, characterized in that, The control method includes the following steps: Step 1: Draw the yarn from the bobbin and pass it through the lower guide groove on the lower guide plate, the tortuous yarn path formed by the yarn holding component, the upper guide groove on the upper guide plate, and then connect it to the bobbin. The initial avoidance position of the tortuous yarn path, the yarn passing through the flexible tortuous yarn path is straight. Step 2: When the yarn unwinding begins, the yarn is unwound from the bobbin and wound onto the yarn tube. At this time, the yarn has formed a certain tension. The controller controls the actuation rotating element to drive the rotating shaft and turntable to rotate, so that the yarn passing through the tortuous yarn path is in a zigzag shape and the yarn is clamped, effectively controlling the additional tension generated by applying pressure to the yarn. Step 3: When the yarn experiences sudden unexpected fluctuations, the controller controls the actuation rotary element to drive the shaft and turntable to increase or decrease the rotation angle, ensuring stable winding tension of the output yarn; In step 1, the yarn is straight when it passes through the tortuous yarn path and passes through the center of the turntable. The tortuous yarn path is in the initial avoidance position. Tension bar I and tension bar II are located on both sides of the yarn. The magnet on the turntable coincides with the position of sensor I, and sensor II is close to tension bar II. In step 2, when the yarn unwinding begins, the controller controls the actuation rotary element to drive the turntable to rotate at a suitable angle. Tension rods I and II move closer to the yarn, causing the yarn to embed into the annular grooves of the ceramic rods on tension rods I and II, restricting the yarn's front and rear positions. This makes the yarn, after passing through the tortuous yarn path, appear as a zigzag line, with the tortuous yarn path in the working position, providing the necessary holding force for the yarn. Simultaneously, in conjunction with the tension sensor on the yarn path, the controller receives real-time feedback on the yarn tension value. Based on the real-time yarn tension, the actuation rotary element rotates at a corresponding angle, thereby adjusting the yarn tension in real-time during high-speed winding and reducing yarn tension fluctuations. The greater the rotation angle of the drive turntable driven by the actuation rotary element, the greater the clamping force on the yarn. When the magnet approaches sensor II, the turntable reaches the maximum rotation angle, limiting the left and right position of the yarn. When the yarn is cut, the tortuous yarn path returns to the initial avoidance position, and tension rod I and tension rod II return to the predetermined initial position, which facilitates subsequent up and down head finding and splicing operations.

Images