Automatic textile yarn winding machine for loom
Patent Information
- Application Number
- CN202522337879.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-11-04
AI Technical Summary
[0005]本实用新型提供一种织布机用纺织纱自动收卷机构,通过适配板上的梯度走线孔适配不同粗细纱线,解决了背景技术中提出的粗节纱段易偏移堆积、断裂的问题;通过辊轮二及抵紧块的设置,解决了背景技术中提出的收卷路线长导致的张力不稳定、摩擦损耗大及断纱风险高的问题
1、该织布机用纺织纱自动收卷机构中,通过矩形框架带动适配板升降,适配板上梯度开设的走线孔可根据纱线粗细选择合适的孔位,提高适配性,可升降调节的适配板可适配不同进线高度的织布机,同时可根据收卷过程中纱线的张力变化,微调走线孔高度,使纱线始终以合理角度进入后续机构,避免因角度不当产生额外张力,结合电动导轨一及调节辊的设置,可以对纺织纱的张力进行初步调节,保证了对于张力调节的精准性。
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Figure CN224883396U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of textile machinery technology, specifically to an automatic yarn winding mechanism for a loom. Background Technology
[0002] In the weaving process, after the textile yarn is woven, it needs to be wound up to form a neat yarn roll. The wound yarn roll is not only easy to store and transport, but also serves as the foundation for subsequent deep processing steps such as dyeing, printing, and cutting. Poor winding quality can lead to yarn knots and breaks, and directly affect the processing accuracy and product qualification rate of subsequent processes. Therefore, an efficient and stable winding process is one of the key links in the textile production process to ensure production continuity and product quality.
[0003] When using a winding machine to spin yarn, first complete the equipment inspection and parameter preset. Set parameters such as winding speed and tension threshold according to the yarn characteristics. Then, thread the yarn through the guide ring, tension sensor detection roller, and pneumatic tension roller in sequence and fix it to the winding shaft sleeve. After starting the equipment, the servo motor drives the winding shaft to rotate and wind the yarn. The stepper motor drives the guide ring to move back and forth. The pneumatic tension roller applies pressure, and the support roller rises to provide support. During operation, the tension sensor provides real-time data feedback. The PLC controller adjusts the motor speed and tension roller pressure to maintain tension balance. The operator monitors the yarn roll formation and fine-tunes the parameters. Once the yarn roll meets the standard, the machine will stop automatically or manually. The support roller will descend, the limit stop ring will be unscrewed, and the yarn roll sleeve will be removed. After replacing the sleeve with a new one, the machine can be restarted to complete a new round of winding operations.
[0004] In practical use, certain problems exist. For example, during the winding process, the inconsistent thickness of the yarn can easily cause issues: when the thicker yarn passes through the guide ring, the increased diameter generates additional friction, which can easily push the yarn off-center, forming a single-sided pile. Furthermore, the thicker yarn has low strength, is subject to high pressure, and is prone to breakage. The thinner yarn will cause a sudden drop in tension, leading to the yarn loosening and the formation of a loose layer in the yarn roll, affecting subsequent unwinding and even causing yarn breakage. On the other hand, due to the long winding route, the tension of the middle yarn section is prone to instability, and the yarn may experience some degree of slippage. The yarn will repeatedly contact the guide roller, and excessive friction will lead to a decrease in yarn tension, resulting in yarn breakage. Therefore, we urgently need an automatic yarn winding mechanism for looms to solve the above problems. Utility Model Content
[0005] This utility model provides an automatic yarn winding mechanism for a loom. By using gradient yarn routing holes on the adapter plate to adapt to yarns of different thicknesses, it solves the problems of easy deviation, accumulation, and breakage of thick yarn segments mentioned in the background art. By setting roller two and the clamping block, it solves the problems of unstable tension, high friction loss, and high risk of yarn breakage caused by long winding paths mentioned in the background art.
[0006] This utility model provides the following technical solution: An automatic yarn winding mechanism for a weaving machine includes a winding machine and a winding table fixedly installed on the winding machine for placing bobbins. It also includes: a worktable fixedly connected to the winding machine, on which an adapter for adapting the yarn is flexibly mounted; an adjustment part flexibly mounted on the winding machine for adjusting tension; and a fixed frame slidably connected to the winding machine, on which a roller for guiding the yarn is rotatably connected, and at the end of the fixed frame, a wire head for the guide wire is flexibly mounted via an electric push rod.
[0007] As a preferred technical solution of this utility model, the adapter includes an adjustment seat fixedly installed on the workbench. The adjustment seat has symmetrically opened placement slots. The workbench is provided with a rectangular frame, and the rectangular frame is symmetrically provided with adapter plates that are adapted to the placement slots. The adapter plates have wiring holes that are gradient from top to bottom.
[0008] As a preferred embodiment of this utility model, a screw for driving a rectangular frame is rotatably connected to one corner of the workbench, and guide rods are fixedly connected to the other three corners of the workbench. One corner of the rectangular frame is threadedly connected to the screw, and the other three corners are slidably connected to the guide rods.
[0009] As a preferred embodiment of this utility model, an adjusting roller for adjusting tension is provided on the adjusting seat and located in the middle of the two sets of adapter plates. An electric guide rail for driving the adjusting roller is symmetrically installed on the adjusting seat, and the two ends of the adjusting roller are respectively fixedly connected to the output end of the corresponding electric guide rail.
[0010] As a preferred embodiment of this utility model, the adjustment unit includes a hydraulic cylinder fixedly installed on the winding machine, the output end of the hydraulic cylinder is fixedly connected to a placement frame, and a roller for adjusting tension is rotatably connected to the placement frame.
[0011] As a preferred technical solution of this utility model, a guide rod is fixedly installed on the placement frame and below the roller two. A clamping block for restricting the textile yarn is symmetrically slidable on the guide rod. A roller three for yarn routing is provided at the end of the clamping block, and both ends of the roller three are slidably connected to the end of the clamping block.
[0012] As a preferred embodiment of this utility model, the winding machine is fixedly connected to an electric guide rail two for driving the fixed frame, and the output end of the electric guide rail two is fixedly connected to the fixed frame.
[0013] Compared with the prior art, this utility model provides an automatic yarn winding mechanism for a weaving machine, which has the following advantages: 1. In the automatic yarn take-up mechanism of this loom, the adapter plate is raised and lowered by a rectangular frame. The gradient opening of the thread guide holes on the adapter plate can be selected according to the yarn thickness to improve adaptability. The adjustable adapter plate can be adapted to looms with different thread feed heights. At the same time, the height of the thread guide holes can be finely adjusted according to the tension change of the yarn during the take-up process, so that the yarn always enters the subsequent mechanism at a reasonable angle and avoids additional tension caused by improper angle. Combined with the setting of electric guide rail and adjusting roller, the tension of the textile yarn can be initially adjusted to ensure the accuracy of tension adjustment.
[0014] 2. In the automatic yarn winding mechanism of this loom, the setting of roller two on the fixed frame driven by the hydraulic cylinder can adjust the tension to a reasonable range in a short time, avoiding yarn slack or breakage due to adjustment lag. Through two sets of clamping blocks and roller three, the rolling contact between roller three and the yarn can be realized, which can reduce friction damage and limit the left and right movement of the yarn, preventing tension fluctuations caused by yarn shaking.
[0015] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model effectively avoids the offset, accumulation and breakage of thick yarn segments due to excessive friction, while preventing yarn slack and loose yarn rolls caused by a sudden drop in tension in thin yarn segments. It ensures the integrity and tightness of the yarn roll during the winding process, avoids the yarn from shifting or deviating during winding, reduces frictional loss between the yarn and the guide components, prevents tension attenuation, and ensures that the yarn is evenly wound on the bobbin. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
[0017] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a partial cross-sectional view of the present invention. Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a partial structural diagram of the present invention.
[0018] In the diagram: 1. Winding machine; 2. Rewinding table; 3. Workbench; 4. Fixing frame; 5. Roller 1; 6. Wire end; 7. Adjusting seat; 8. Placement slot; 9. Rectangular frame; 10. Adapter plate; 11. Wire routing hole; 12. Screw; 13. Guide rod; 14. Adjusting roller; 15. Electric guide rail 1; 16. Hydraulic cylinder; 17. Placement frame; 18. Roller 2; 19. Guide rod; 20. Clamping block; 21. Roller 3; 22. Electric guide rail 2. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Example: Reference Figures 1-4 An automatic yarn winding mechanism for a loom includes a winding machine 1 and a winding table 2 fixedly mounted on the winding machine 1 for placing bobbins. In this embodiment, the winding table 2 is driven to rotate by an external drive motor. When the bobbin is placed on the winding table 2, the end of the textile yarn is connected to the bobbin. With the drive motor, the bobbin can be rotated to complete the winding of the textile yarn.
[0021] It is important to note that the winding machine 1, as the power source of the entire winding mechanism, provides stable and adjustable torque and speed to drive the bobbin on the winding table 2 to rotate, achieving automatic winding of the yarn. This ensures uniform power output during yarn winding and avoids uneven yarn tension caused by power fluctuations. The winding machine 1 can be linked with the controller, tension sensor, and other components of the adjustment unit to receive tension detection signals and coordinately adjust the power output. When the tension is abnormal, the winding machine 1 can work with the hydraulic cylinder 16 to control the height of the roller 18 and simultaneously fine-tune the speed to further ensure... The winding machine 1 ensures stable winding tension. It can adjust operating parameters via a built-in module according to yarn type (e.g., cotton, silk, thickness, and winding requirements) to adapt to the winding requirements of different yarn specifications, thus improving the versatility of the mechanism. It is also equipped with an operating status monitoring component that can monitor its own speed, torque, temperature, and other parameters in real time. When parameters exceed safe ranges or abnormalities such as yarn jamming or breakage occur, it can trigger early warning devices such as audible and visual alarms and can also shut down the machine, ensuring equipment and operational safety. The winding machine 1 is a direct reference to a conventional technical solution and will not be elaborated upon further here.
[0022] It also includes a worktable 3 fixedly connected to the winding machine 1. The worktable 3 is equipped with an adapter for adapting to the textile yarn. The adapter includes an adjustment seat 7 fixedly installed on the worktable 3. The adjustment seat 7 is symmetrically provided with placement slots 8. The worktable 3 is provided with a rectangular frame 9, and the rectangular frame 9 is symmetrically provided with adapter plates 10 that are adapted to the placement slots 8. The adapter plates 10 are provided with wire routing holes 11 from top to bottom. One corner of the worktable 3 is rotatably connected to a screw 12 for driving the rectangular frame 9, and the other three corners of the worktable 3 are fixedly connected to guide rods 13. One corner of the rectangular frame 9 is threadedly connected to the screw 12, and the other three corners are slidably connected to the guide rods 13.
[0023] Here, the wiring holes 11 on the adapter plate 10 can be selected according to the actual thickness of the yarn, so as to avoid excessive friction or insufficient limiting caused by the mismatch between the hole diameter and the yarn diameter. For thicker yarns, a wiring hole 11 with a larger diameter can be selected to reduce the contact area between the yarn and the hole wall; for thinner yarns, a wiring hole 11 with a smaller upper diameter is selected to ensure the stability of the yarn during wiring and prevent deviation.
[0024] Furthermore, the lifting structure of the rectangular frame 9, driven by the screw 12 and guide rod 19, can drive the adapter plate 10 to lift synchronously, thereby adjusting the height of the thread hole 11 to adapt to looms with different thread inlet heights. It can also finely adjust the height of the thread hole 11 according to the tension change of the yarn during winding, so that the yarn always enters the subsequent mechanism at a reasonable angle, avoiding additional tension caused by improper angle. The top of the screw 12 is equipped with a handwheel and anti-slip texture, which allows the operator to easily adjust it manually. The operation is convenient and the adjustment accuracy is high. The guide rod 19 ensures the stability of the rectangular frame 9 during lifting and lowering, preventing shaking from affecting the yarn thread.
[0025] In other embodiments, an elastic buffer layer made of silicone material can be provided on the inner wall of the thread hole 11. When the thicker yarn segment passes through the thread hole 11, the elastic buffer layer can adapt to the diameter change of the thicker segment through its own deformation, reduce the hard friction between the thicker segment and the hole wall, and avoid pushing the yarn to deviate and forming a single-sided accumulation due to excessive friction. At the same time, the elastic properties of silicone can disperse the pressure on the thicker yarn segment, reduce the risk of it breaking due to concentrated pressure, and effectively protect the integrity of the yarn.
[0026] An adjusting roller 14 for adjusting tension is provided on the adjusting seat 7 and located in the middle of the two sets of adapter plates 10. Electric guide rails 15 for driving the adjusting roller 14 are symmetrically installed on the adjusting seat 7. The two ends of the adjusting roller 14 are fixedly connected to the output ends of the corresponding electric guide rails 15.
[0027] Here, the adjusting roller 14, located in the middle of the two sets of adapter plates 10, moves up and down by being driven by the electric guide rail 15. By changing the height of the adjusting roller 14, the contact arc between the yarn and the adjusting roller 14 is adjusted, thereby initially adjusting the yarn tension. For example, when the yarn tension is too low, the electric guide rail 15 drives the adjusting roller 14 to descend, increasing the winding angle of the yarn and increasing the tension; when the tension is too high, the adjusting roller 14 rises, decreasing the winding angle, reducing the tension of the woven yarn, and improving the accuracy of subsequent processing.
[0028] In other embodiments, the wear-resistant rubber layer and arc-shaped groove covering the surface of the adjusting roller 14 can provide both wear resistance and positioning. The wear-resistant rubber layer can extend the service life of the adjusting roller 14 and reduce the wear caused by long-term friction with the yarn. The arc-shaped groove can confine the yarn within a fixed area, prevent the yarn from sliding and deviating on the surface of the adjusting roller 14, and ensure the stability of the initial tension adjustment.
[0029] The lifting device on the winding machine 1 is an adjustment part for adjusting tension. The adjustment part includes a hydraulic cylinder 16 fixedly installed on the winding machine 1. The output end of the hydraulic cylinder 16 is fixedly connected to a placement frame 17. A roller 18 for adjusting tension is rotatably connected to the placement frame 17. A guide rod 19 is fixedly installed on the placement frame 17 and below the roller 18. A clamping block 20 for restricting the woven yarn is symmetrically slidably on the guide rod 19. A roller 21 for thread feeding is provided at the end of the clamping block 20, and both ends of the roller 21 are slidably connected to the end of the clamping block 20.
[0030] Here, the hydraulic cylinder 16 drives the placement frame 17 and the roller 18 to rise and fall, with high adjustment accuracy and fast response speed. It can achieve fine adjustment of the height of the roller 18, thereby accurately controlling the yarn tension. For example, when a change in tension is detected, the hydraulic cylinder 16 can quickly drive the roller 18 to move, and adjust the tension to a reasonable range in a short time, avoiding yarn loosening or breakage due to adjustment lag.
[0031] In other embodiments, yarn-blocking rings can be provided at both ends of roller 2 18. The yarn-blocking rings are designed to prevent the yarn from slipping off from both ends of roller 2 18. The inner diameter of the yarn-blocking rings is slightly larger than the diameter of roller 2 18. This design provides a reliable limit for the yarn without affecting the rotation of roller 2 18, ensuring that the yarn is always within the effective working area of roller 2 18 and ensuring the effectiveness of tension adjustment.
[0032] Furthermore, the tension sensor installed on roller 18 can detect changes in yarn tension in real time and convert the detection data into electrical signals, which are then transmitted to an external controller. The controller analyzes and judges the received signals based on a preset tension threshold. When the detected tension is below the threshold (i.e., when a thin yarn segment passes through), it immediately sends a command to hydraulic cylinder 16 to drive roller 18 upward, increasing the yarn tension. When the tension is above the threshold, it controls hydraulic cylinder 16 to drive roller 18 downward, reducing the tension. This effectively solves the problems of yarn slack and loose yarn rolls caused by thin yarn segments.
[0033] Here, the symmetrically sliding abutting block 20 on the guide rod 19 can apply a certain abutting force to the yarn. Together with the end roller 3 21, it plays a double limiting role for the yarn. The roller 3 21 rolls and contacts the yarn, which can reduce friction damage and limit the left and right movement of the yarn, preventing tension fluctuations caused by yarn shaking.
[0034] It should be noted that the two sets of clamping blocks 20 can be limited by bolts, or the two sets of clamping blocks 20 can be moved relative to each other or in opposite directions by adding a motor to drive the bidirectional screw 12 to rotate, or the relative to each other or in opposite directions can be achieved by driving its output end with an electric guide rail.
[0035] A fixed frame 4 is slidably connected to the winding machine 1. An electric guide rail 22 for driving the fixed frame 4 is fixedly connected to the winding machine 1, and the output end of the electric guide rail 22 is fixedly connected to the fixed frame 4. A roller 5 for wire routing is rotatably connected to the fixed frame 4. A wire head 6 for the wire is provided at the end of the fixed frame 4 by means of an electric push rod.
[0036] Here, the electric guide rail 22 can drive the fixed frame 4 to reciprocate, thereby driving the roller 5 and the guide head 6 to move synchronously. This allows the guide position to be adjusted according to the winding position of the bobbin and the yarn routing requirements, so that the yarn is evenly distributed on the bobbin and avoids one-sided accumulation. At the same time, the reciprocating adjustment can shorten the yarn routing path from the adapter to the winding table 2, reduce the yarn swaying amplitude in the air, and reduce the risk of tension instability caused by excessively long routing path.
[0037] Furthermore, the electric push rod at the end of the fixed frame 4 can drive the guide head 6 to move up and down, thereby adjusting the longitudinal threading height of the yarn. By cooperating with the reciprocating sliding of the fixed frame 4, the contact length and number of contacts between the yarn and the roller 5 and the guide head 6 are reduced. For example, according to the change in the diameter of the bobbin during the winding process, the height of the guide head 6 is gradually adjusted so that the yarn is always wound at an angle perpendicular to the bobbin axis, avoiding increased friction and tension attenuation caused by angle deviation.
[0038] It should be noted that roller 5 adopts a rotating connection design. When the yarn passes through, it drives roller 5 to rotate, which converts sliding friction into rolling friction, greatly reducing the coefficient of friction, reducing wear and tension attenuation on the yarn surface, and the guide head 6 can guide the yarn to pass through smoothly, avoiding yarn snagging and jamming, and further ensuring the smoothness of the yarn.
[0039] In this invention, when the yarn enters the winding mechanism, it first undergoes preliminary adaptation and guidance through the adapter part of the worktable 3. The operator rotates the screw 12 to drive the rectangular frame 9 to rise and fall along the guide rod 13 according to the yarn thickness, adjusts the height of the adapter plate 10 to a suitable position, and then selects the gradient threading hole 11 with the corresponding aperture on the adapter plate 10 to allow the yarn to pass through. The silicone elastic buffer layer on the inner wall of the threading hole 11 can buffer the friction and pressure when the thick yarn section passes through, and prevent the yarn from deviating or breaking. At the same time, the electric guide rail 15 drives the adjusting roller 14 to move up and down. By changing the contact arc between the adjusting roller 14 and the yarn, the yarn tension is initially adjusted to ensure that the yarn enters the subsequent stage in a stable state. After adjusting the spacing of the two sets of clamping blocks 20 to match the yarn, the yarn is passed through the roller 3 21 at the end of the clamping block 20 and contacts the roller 2 18. The clamping block 20 limits the yarn and prevents it from shifting. The tension sensor on the roller 2 18 detects the yarn tension in real time and transmits the signal to the external controller: when the tension is too low, such as when a thin yarn segment passes through, the controller instructs the hydraulic cylinder 16 to drive the placement frame 17 to rise, which in turn raises the roller 2 18 to increase the yarn tension and prevent the yarn from slack; when the tension is too high, the hydraulic cylinder 16 drives the placement frame 17 to fall, which lowers the roller 2 18 to reduce the tension and prevent the yarn from breaking. Subsequently, the yarn with stable tension enters the guide structure of the fixed frame 4. The electric guide rail 22 drives the fixed frame 4 to slide laterally along the winding machine 1, and the electric push rod drives the lead wire head 6 to rise and fall. Through the cooperation of the two, the positions of the roller 5 and the lead wire head 6 are adjusted to optimize the yarn path. The guided yarn is guided to the bobbin on the winding table 2. The winding machine 1 provides stable power to drive the bobbin to rotate, realizing the automatic winding of the yarn. During the winding process, the continuous adjustment of the fixed frame 4 and the lead wire head 6 can ensure that the yarn is evenly wound on the bobbin, avoiding one-sided accumulation, and finally forming a tight and regular yarn roll.
[0040] Components not described in detail in this article are existing technologies.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. An automatic yarn winding mechanism for a loom, comprising a winding machine (1) and a winding table (2) fixedly mounted on the winding machine (1) for placing bobbins, characterized in that, Also includes: A worktable (3) is fixedly connected to the winding machine (1), and an adapter part for adapting to the textile yarn is provided on the worktable (3) for lifting and lowering. The lifting mechanism is an adjustment part on the winding machine (1) used to adjust the tension; A fixed frame (4) is slidably connected to the winding machine (1). A roller (5) for wire routing is rotatably connected to the fixed frame (4). A wire head (6) for the wire is provided at the end of the fixed frame (4) by means of an electric push rod.
2. The automatic yarn winding mechanism for a loom according to claim 1, characterized in that, The adapter includes an adjustment seat (7) fixedly installed on the workbench (3), the adjustment seat (7) is symmetrically provided with placement slots (8), the workbench (3) is provided with a rectangular frame (9), and the rectangular frame (9) is symmetrically provided with an adapter plate (10) that is compatible with the placement slot (8), and the adapter plate (10) is provided with wiring holes (11) from top to bottom.
3. The automatic yarn winding mechanism for a loom according to claim 2, characterized in that, One corner of the workbench (3) is rotatably connected to a screw (12) for driving a rectangular frame (9), and the other three corners of the workbench (3) are fixedly connected to guide rods (13). One corner of the rectangular frame (9) is threadedly connected to the screw (12), and the other three corners are slidably connected to the guide rods (13).
4. The automatic yarn winding mechanism for a loom according to claim 2, characterized in that, An adjusting roller (14) for adjusting tension is provided on the adjusting seat (7) and located in the middle of the two sets of adapter plates (10). An electric guide rail (15) for driving the adjusting roller (14) is symmetrically installed on the adjusting seat (7). The two ends of the adjusting roller (14) are respectively fixedly connected to the output end of the corresponding electric guide rail (15).
5. The automatic yarn winding mechanism for a loom according to claim 1, characterized in that, The adjustment unit includes a hydraulic cylinder (16) fixedly mounted on the winding machine (1), and a placement frame (17) is fixedly connected to the output end of the hydraulic cylinder (16). A roller (18) for adjusting tension is rotatably connected to the placement frame (17).
6. The automatic yarn winding mechanism for a weaving machine according to claim 5, characterized in that, A guide rod (19) is fixedly installed on the placement frame (17) and below the roller two (18). A clamping block (20) for restricting the textile yarn is symmetrically slidable on the guide rod (19). A roller three (21) for the yarn is provided at the end of the clamping block (20), and both ends of the roller three (21) are slidably connected to the end of the clamping block (20).
7. The automatic yarn winding mechanism for a loom according to claim 1, characterized in that, The winding machine (1) is fixedly connected to an electric guide rail (22) for driving the fixed frame (4), and the output end of the electric guide rail (22) is fixedly connected to the fixed frame (4).