Anti-loose and collapse winding yarn feeding mechanism of cool filament cotton circular knitting machine

Abstract

The utility model relates to textile machinery manufacturing technical field, especially a kind of cool silk cotton cylinder knitting machine anti-loose winding yarn feeding mechanism, including machine frame, it is characterized by: the machine frame is double-layer structure and includes lower frame and upper frame, the upper frame and lower frame are associated with cooperation, the lower frame outer wall one side is equipped with control part, the lower frame inside bottom is equipped with cylinder protection frame, the cylinder protection frame inside center is equipped with yarn guide part, the yarn guide part bottom is equipped with drive unit, the upper frame includes annular track, annular track is equipped with yarn cylinder bearing part, the application adopts double-layer frame, lower bearing power and control, upper annular track even distribution yarn cylinder bearing part, synchronous pulley ensures that multiple yarn cylinder is sent yarn at the same speed, prevent inconsistent supply yarn and loose winding;Transparent protective cover and buffer layer are convenient for observation, impact absorption, block foreign matter, reduce winding risk.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery manufacturing technology, and in particular to a yarn feeding mechanism for preventing loosening and wrapping in a cotton cylindrical knitting machine. Background Technology

[0002] In the modern textile industry, circular knitting machines are widely used in underwear, sportswear, and medical textiles due to their ability to efficiently produce seamless cylindrical fabrics. The yarn feeding mechanism, as a core component of the knitting machine, directly affects the stability of yarn delivery and the quality of the final fabric. With the market's increasing demands for knitted fabric quality, especially for fiber materials like cotton that require high uniformity and surface smoothness, traditional yarn feeding mechanisms often face problems such as yarn tension fluctuations, asynchronous yarn feeding, and disordered paths during long-term operation. If these problems are not effectively controlled, they can easily lead to loose yarn accumulation or tangling, resulting in frequent interruptions in the knitting process, fabric defects, and even equipment damage, severely impacting production efficiency and product qualification rates. Currently, many circular knitting machines lack effective zoning and collaborative design in their yarn feeding mechanisms, lack real-time tension monitoring and dynamic control methods, and suffer from poor visibility, weak impact resistance, and susceptibility to foreign object interference in yarn bobbin installation and protection, making it difficult to meet the demands of high-speed, continuous, and high-quality production.

[0003] Chinese patent discloses a circular knitting machine (publication number: CN 216738768 U) comprising a machine body and a casing. The outer wall of the machine body is fitted with a casing, and the outer wall of the casing is fitted with a protective mechanism. The inner cavity of the protective shell fits into the casing, and a sliding sleeve is fixedly connected to the outer wall of the protective shell. A guide rod is sleeved inside the sliding sleeve, and connecting plates are fixedly connected to both the upper and lower ends of the guide rod. The outer wall of the connecting plate is fixedly connected to the casing. However, due to its unreasonable structural layout, lack of synchronous drive and real-time tension control, and effective protection, the yarn feeding mechanism of this circular knitting machine is prone to yarn loosening and tangling, affecting production continuity and fabric quality. Therefore, a yarn feeding mechanism to prevent loosening and tangling is needed for a cotton circular knitting machine. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the existing yarn feeding mechanism of the existing cylindrical knitting machine is prone to yarn loosening and tangling due to unreasonable structural layout, lack of synchronous drive and real-time tension control and effective protection, which affects the continuity of production and the quality of fabric. Therefore, a yarn feeding mechanism to prevent loosening and tangling of the yarn is proposed for the Cool Silk Cotton cylindrical knitting machine.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The present utility model provides a yarn feeding mechanism for preventing loosening and winding of cotton cylindrical knitting machine, which includes a machine frame. The machine frame is characterized in that it is a double-layer structure and includes a lower frame and an upper frame. The upper frame and the lower frame are associated and cooperate with each other. A control part is provided on one side of the outer wall of the lower frame. A roller protection frame is provided at the bottom of the lower frame. A yarn guide part is provided at the center of the roller protection frame. A drive unit is provided at the bottom of the yarn guide part. The upper frame includes a ring track, and a yarn cylinder bearing part is provided on the ring track. Through the layered design of the double-layer frame (the lower part supports the basic structure and power / control module, and the upper part carries the yarn bobbin conveying module), functional zoning and structural stability are achieved, avoiding mutual interference between components; the yarn guide is located in the center of the roller guard frame, which can standardize the yarn path from the source and reduce loosening or cross-entanglement caused by chaotic paths; the yarn bobbin carrying part on the circular track makes multiple sets of yarn feeding bobbins distributed in a ring, which is suitable for the circumferential operation requirements of the circular knitting machine and improves space utilization and yarn feeding coordination; the linkage between the drive unit and the yarn guide provides continuous power for yarn conveying and constrains the path, jointly constructing a basic structural framework that prevents loosening and entanglement.

[0006] Preferably, the yarn bobbin support includes multiple sets of yarn bobbin mounting units evenly distributed along a circular track. Each set of yarn bobbin mounting units includes a yarn feeder and a support base associated with the yarn feeder. The support base has a synchronous pulley on one side and a connecting fastener on the other side. The even distribution of multiple sets of yarn bobbin mounting units along the circular track allows multiple yarns to be synchronously fed in the circumferential direction of the circular knitting machine, avoiding localized loosening caused by uneven yarn feeding from a single yarn bobbin. The support base receives uniform power through the synchronous pulley, ensuring consistent rotation speed of each set of yarn feeders and preventing yarn from tangling or experiencing sudden tension changes due to differences in feeding speed. The connecting fastener enhances the connection strength between the support base and the track, preventing displacement of the support base due to vibration or external force during yarn feeding, ensuring stable yarn bobbin position, indirectly maintaining the fixation of the yarn feeding path, and further suppressing loosening and tangling. Preferably, a protective cover is provided on one side of the support base. The protective cover is made of transparent material, and a buffer layer is provided on the inner wall of the protective cover. The transparent protective cover allows operators to visually observe the operating status of the yarn feeder (such as the remaining yarn amount and whether it is jammed), enabling quick troubleshooting without disassembly and improving maintenance efficiency. The inner wall buffer layer absorbs the impact of accidental external collisions (such as accidental tool contact or yarn feeder shaking), preventing damage or displacement of the yarn feeder due to rigid collisions and protecting the structural integrity of the yarn feeder and support base. At the same time, the protective cover can block foreign objects such as flying lint and dust from entering the yarn feeding area, preventing foreign objects from tangling with the yarn or interfering with the rotation of the yarn feeder, reducing the risk of tangling from a physical isolation perspective and extending the service life of the equipment.

[0007] Preferably, the support base is equipped with a tension detection component, which includes a tension sensor and a signal amplifier, with the signal amplifier electrically connected to the tension sensor. The tension sensor monitors the tension changes of the yarn in real time during the feeding process, and the signal amplifier amplifies the weak tension signal and transmits it to the control unit, enabling the system to dynamically monitor the tension state of each yarn. When the tension is too high (which may cause the yarn to stretch and break) or too low (which may cause the yarn to sag and accumulate), the control unit can promptly link with the drive unit to adjust the yarn feeding speed or tension compensation, ensuring that the yarn is always in a suitable tension state. This fundamentally avoids the tangling problem caused by loosening or excessive relaxation due to uncontrolled tension, and improves the uniformity of yarn feeding and the stability of knitting quality.

[0008] Preferably, the control unit includes a display screen and control buttons located below the display screen. The display screen converts abstract data such as tension and speed into visual information, allowing operators to intuitively grasp the operating status of the mechanism (e.g., an abnormal increase in the tension of a yarn bobbin), and quickly locate the problem without relying on experience. The control buttons provide a convenient human-machine interface, allowing operators to flexibly set parameters according to actual production needs (e.g., adjusting tension when changing yarn type), and actively intervene in the yarn feeding process. This closed-loop interactive design of "monitoring-display-control" makes the control of preventing loosening and tangling more precise and more in line with actual needs, improving the ease of use and adaptability of the equipment.

[0009] Preferably, the drive unit includes a servo motor and a drive turntable associated with the servo motor. The servo motor can precisely adjust its output power and speed according to the instructions of the control unit, avoiding the sudden changes in yarn feeding speed caused by speed fluctuations in traditional motors, thereby maintaining stable yarn tension and reducing the risk of loosening. The drive turntable, as an intermediate component for power transmission, can efficiently transmit the rotational power of the motor to the yarn guide or yarn bobbin bearing part, ensuring the continuity of power output and preventing yarn accumulation and tangling caused by power interruption or sudden changes. The high response characteristics of the servo motor can also be combined with the feedback of the tension detection component to realize real-time fine adjustment of the yarn feeding speed, further improving the dynamic control capability against loosening and tangling.

[0010] The advantages of this utility model are: This application's anti-loosening and tangling yarn feeding mechanism for the Cool Silk Cotton Circular Knitting Machine utilizes a rationally layered layout of a double-layer frame. The lower frame centrally supports the basic structure, power supply, and operational control functions, while the upper frame uses a circular track to support multiple yarn bobbin mounting units, achieving efficient space utilization and a standardized yarn delivery path. The multiple yarn bobbin support units on the circular track evenly distribute the yarn bobbins, and synchronous pulleys ensure synchronized rotation of all bobbins, guaranteeing uniform yarn delivery along the circumference of the circular knitting process. This prevents localized loosening or tangling caused by inconsistent yarn feeding rhythms. The transparent protective cover on the support base, combined with the inner wall buffer layer, not only allows operators to visually monitor the bobbin's operating status but also absorbs impact during accidental collisions, protecting the bobbins and support structure from damage. Simultaneously, it prevents the entry of lint and dust, reducing the possibility of foreign objects interfering with the yarn path and causing tangling. The tension detection component on the support base can sense changes in yarn tension in real time and transmit the signal to the control unit via a signal amplifier. This allows the system to dynamically adjust the yarn feeding speed or tension compensation based on the tension status, ensuring the yarn maintains an appropriate tension and fundamentally suppressing loosening, accumulation, and tangling caused by excessive or insufficient tension. The control unit is equipped with a display screen and control buttons, enabling visual presentation of operating parameters and convenient human-machine interaction. Operators can monitor the equipment status at any time and set parameters and switch modes according to production needs, improving the accuracy and flexibility of control. The drive unit uses a servo motor and drive turntable to provide high-precision and adjustable power output. Power is smoothly transmitted to the multi-yarn bobbins and yarn guide via synchronous pulleys, ensuring consistent and stable yarn feeding speed and enabling real-time fine-tuning based on tension detection feedback, further enhancing the dynamic control capabilities against loosening and tangling. The yarn guide is located at the center of the roller guard frame, orderly constraining the yarn path and reducing crossing and tangling caused by disordered paths. The roller guard frame itself provides physical protection for internal rotating components, improving the overall reliability of operation. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the yarn bobbin support structure of this utility model.

[0014] Figure 3 This is a top view of the structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the main structure of this utility model.

[0016] In the diagram: 1. Upper frame; 2. Yarn bobbin support; 3. Yarn guide; 4. Lower frame; 5. Roller guard; 6. Control unit; 7. Servo motor; 8. Protective cover; 9. Buffer layer; 10. Yarn feeder; 11. Support base; 12. Connecting fasteners; 13. Synchronous pulley. Detailed Implementation

[0017] 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 scope of protection of the present utility model. Example

[0018] Please see Figure 1-4 As shown, a yarn feeding mechanism for preventing loosening and tangling in a cotton circular knitting machine includes a machine frame. The machine frame is a double-layer structure comprising a lower frame 4 and an upper frame 1, which are connected and cooperate with each other. A control unit 6 is provided on one side of the outer wall of the lower frame 4. A roller guard 5 is provided at the bottom inside the lower frame 4. A yarn guide 3 is provided at the center inside the roller guard 5. A drive unit is provided at the bottom of the yarn guide 3. The upper frame 1 includes a circular track, on which a yarn bobbin bearing unit 2 is provided. Through the layered design of the double-layer frame (the lower part supports the basic structure and power / control module, and the upper part carries the yarn bobbin conveying module), functional zoning and structural stability are achieved, avoiding mutual interference between components; the yarn guide 3 is located at the center of the roller guard frame 5, which can standardize the yarn path from the source and reduce loosening or cross-entanglement caused by chaotic paths; the yarn bobbin carrying part 2 on the circular track makes multiple sets of yarn feeding bobbins 10 distributed in a ring, which is suitable for the circumferential operation requirements of the circular knitting machine and improves space utilization and yarn feeding coordination; the linkage between the drive unit and the yarn guide 3 provides continuous power for yarn conveying and constrains the path, jointly constructing a basic structural framework that prevents loosening and entanglement.

[0019] In this embodiment, the yarn bobbin carrying part 2 includes multiple sets of yarn bobbin mounting units evenly distributed along a circular track. Each set of yarn bobbin mounting units includes a yarn feeder 10 and a support base 11 associated with the yarn feeder 10. The support base 11 has a synchronous pulley 13 on one side and a connecting fastener 12 on the other side. The multiple sets of yarn bobbin mounting units are evenly distributed along the circular track, which allows multiple yarns to be fed synchronously in the circumferential direction of the circular knitting machine, avoiding local loosening caused by uneven yarn feeding from a single yarn bobbin. The support base 11 receives uniform power through the synchronous pulley 13, ensuring that the rotation speed of each set of yarn feeders 10 is consistent, preventing the yarns from tangling or experiencing sudden tension changes due to differences in conveying speed. The connecting fastener 12 enhances the connection strength between the support base 11 and the track, preventing the support base 11 from shifting due to vibration or external force during yarn feeding, ensuring the stability of the yarn bobbin position, indirectly maintaining the fixation of the yarn conveying path, and further suppressing loosening and tangling. In this embodiment, a protective cover 8 is provided on one side of the support base 11. The protective cover 8 is made of transparent material, and a buffer layer 9 is provided on the inner wall of the protective cover 8. The transparent material of the protective cover 8 allows the operator to visually observe the operating status of the yarn feeding cylinder 10 (such as the remaining amount of yarn, whether it is stuck), and can quickly troubleshoot abnormalities without disassembly, thus improving maintenance efficiency. The inner wall buffer layer 9 can absorb the impact force of accidental external collisions (such as accidental tool contact, yarn cylinder shaking), preventing the yarn feeding cylinder 10 from being damaged or displaced due to rigid collisions, and protecting the structural integrity of the yarn cylinder and the support base 11. At the same time, the protective cover 8 can block foreign objects such as flying lint and dust from entering the yarn feeding area, preventing foreign objects from entangled in the yarn or interfering with the rotation of the yarn cylinder, reducing the risk of entanglement from the perspective of physical isolation, and extending the service life of the equipment.

[0020] In this embodiment, a tension detection component is provided on the support base 11. The tension detection component includes a tension sensor and a signal amplifier, and the signal amplifier is electrically connected to the tension sensor. The tension sensor monitors the tension change of the yarn in real time during the conveying process. The signal amplifier amplifies the weak tension signal and transmits it to the control unit 6, enabling the system to dynamically grasp the tension state of each yarn. When the tension is too high (which may cause the yarn to stretch and break) or too low (which may cause the yarn to sag and accumulate), the control unit 6 can promptly link with the drive unit to adjust the yarn feeding speed or tension compensation, ensuring that the yarn is always in a suitable tension state. This fundamentally avoids the tangling problem caused by loosening or excessive relaxation due to uncontrolled tension, and improves the uniformity of yarn feeding and the stability of knitting quality.

[0021] In this embodiment, the control unit 6 includes a display screen and control buttons located below the display screen. The display screen converts abstract data such as tension and speed into visual information, allowing operators to intuitively grasp the operating status of the mechanism (e.g., an abnormal increase in the tension of a yarn bobbin), and quickly locate the problem without relying on experience. The control buttons provide a convenient human-machine interface, allowing operators to flexibly set parameters according to actual production needs (e.g., adjusting tension when changing yarn type), enabling proactive intervention in the yarn feeding process. This closed-loop interactive design of "monitoring-display-control" makes the control of preventing loosening and tangling more precise and more in line with actual needs, improving the ease of use and adaptability of the equipment.

[0022] In this embodiment, the drive unit includes a servo motor 7 and a drive turntable associated with the servo motor 7. The servo motor 7 is a commercially available product that can be purchased directly. The servo motor 7 can precisely adjust its output power and speed according to the instructions of the control unit 6, avoiding the sudden changes in yarn feeding speed caused by speed fluctuations in traditional motors, thereby maintaining stable yarn tension and reducing the risk of loosening. The drive turntable, as an intermediate component for power transmission, can efficiently transmit the rotational power of the motor to the yarn guide 3 or the yarn bobbin carrier 2, ensuring the continuity of power output and preventing yarn accumulation and tangling due to power interruption or sudden changes. The high response characteristics of the servo motor 7 can also be combined with the feedback of the tension detection component to achieve real-time fine adjustment of the yarn feeding speed, further improving the dynamic control capabilities against loosening and tangling.

[0023] The implementation principle of this embodiment is as follows: First, the double-layer structure of the lower frame 4 and the upper frame 1 forms a stable overall frame. The roller guard 5 inside the lower frame 4 and the central yarn guide 3 provide basic path constraints and protection for rotating parts of the yarn. After the servo motor 7 of the drive unit starts, it outputs power through the drive turntable. Part of the power is directly applied to the yarn guide 3 to ensure that the yarn travels along the predetermined trajectory, and the other part is transmitted to the yarn bobbin carrier 2 on the circular track of the upper frame 1 through the transmission system (such as a synchronous belt).

[0024] The multiple yarn bobbin mounting units of the yarn bobbin carrier 2, driven by the synchronous belt pulley 13, achieve synchronous rotation of the multiple yarn feeding bobbins 10, enabling each yarn to unwind from the yarn feeding bobbin 10 at the same rhythm and enter the path set by the yarn guide 3. During this process, the tension detection component on the support base 11 continuously contacts the yarn, and the tension sensor collects the tension force data of the yarn in real time, and transmits the weak signal to the signal amplifier for amplification and shaping, and then transmits it to the control unit 6 on the outer wall of the lower frame 4. The display screen in the control unit 6 visualizes the operating parameters such as tension and speed to the operator. The operator can set the tension threshold or adjust the yarn feeding mode according to the process requirements through the control buttons; when the tension detection value deviates from the set range, the control unit 6 will send a command to the drive unit, which will fine-tune the speed of the servo motor 7 or change the output torque of the drive turntable, thereby adjusting the yarn conveying speed or compensating for tension, so that the yarn is always maintained in a suitable and uniform tension state. Meanwhile, the transparent protective cover 8 on one side of the support base 11 allows the operator to observe the status of the yarn bobbin without interfering with the operation. The buffer layer 9 on the inner wall absorbs the impact when subjected to accidental collisions, preventing the yarn bobbin from shifting or being damaged, and blocking the entry of external foreign objects, reducing the risk of foreign objects getting entangled.

[0025] The yarn guide 3, located at the center of the roller guard 5, consolidates and guides yarns from different yarn bobbins in an orderly manner, ensuring they maintain parallel, non-intersecting paths before entering the knitting area and preventing tangling of multiple yarns due to intersecting paths. The roller guard 5 provides enclosed protection for the internal rotating components, preventing yarn or external debris from getting caught and causing mechanical failure. Thus, from power output, synchronous unwinding, path guidance, tension monitoring to intelligent speed regulation and physical protection, all aspects work together to form a closed-loop system that can automatically sense and correct the yarn condition. This continuously prevents yarn loosening and tangling during the circular knitting process of Cool Silk Cotton, ensuring continuous, stable, and high-quality knitting operations.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A yarn feeding mechanism for preventing loosening and winding in a cotton cylindrical knitting machine, comprising a machine frame, characterized in that: The machine frame is a double-layer structure and includes a lower frame (4) and an upper frame (1). The upper frame (1) and the lower frame (4) are connected and cooperate with each other. A control part (6) is provided on one side of the outer wall of the lower frame (4). A roller protection frame (5) is provided at the bottom inside the lower frame (4). A yarn guide part (3) is provided at the center inside the roller protection frame (5). A drive unit is provided at the bottom of the yarn guide part (3). The upper frame (1) includes a ring track. A yarn bobbin bearing part (2) is provided on the ring track.

2. The anti-loosening and winding yarn feeding mechanism for a cotton cylindrical knitting machine according to claim 1, characterized in that: The yarn bobbin support (2) includes multiple sets of yarn bobbin mounting units evenly distributed along the annular track. Each set of yarn bobbin mounting units includes a yarn feeder (10) and a support base (11) associated with the yarn feeder (10). The support base (11) has a synchronous pulley (13) on one side and a connecting fastener (12) on the other side.

3. The anti-loosening and winding yarn feeding mechanism for a cotton cylindrical knitting machine according to claim 2, characterized in that: The support base (11) is provided with a protective cover (8) on one side. The protective cover (8) is made of transparent material and a buffer layer (9) is provided on the inner wall of the protective cover (8).

4. The anti-loosening and winding yarn feeding mechanism for a cotton cylindrical knitting machine according to claim 2, characterized in that: The support base (11) is provided with a tension detection component, which includes a tension sensor and a signal amplifier, and the signal amplifier is electrically connected to the tension sensor.

5. The anti-loosening and winding yarn feeding mechanism for a cotton cylindrical knitting machine according to claim 1, characterized in that: The control unit (6) includes a display screen and control buttons located below the display screen.

6. The anti-loosening and winding yarn feeding mechanism for a cotton cylindrical knitting machine according to claim 1, characterized in that: The drive unit includes a servo motor (7) and a drive turntable associated with the servo motor (7).

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