A weighted yarn return device
By adjusting the dynamic gravity torque of the counterweight-type yarn return device, the complexity and lag of yarn tension adjustment in existing technologies have been solved, thereby improving the stability of yarn movement and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIANYUNGANG TUOTIAN AVIATION EQUIP CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-06-30
AI Technical Summary
Existing yarn return devices rely on external power sources and manual operation, resulting in complex equipment, high costs, high energy consumption, and difficulty in real-time compensation for dynamic changes in yarn, affecting yarn movement stability and production efficiency.
It adopts a counterweight design and uses dynamic gravity torque to adjust the yarn tension. Automatic yarn tension compensation is achieved through the counterweight frame and guide rod. The counterweight frame moves with the synchronous belt to adjust the position of the yarn roller, ensuring that the yarn maintains a stable tension state during movement.
It achieves real-time automatic compensation of yarn tension, reduces manual operation and external power requirements, improves the level of production automation and product quality stability, and reduces failure risk and production costs.
Smart Images
Figure CN224429828U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of textile machinery technology, and in particular to a weighted yarn return device. Background Technology
[0002] Yarn rewinding devices are typically used during yarn unwinding, conveying, or winding processes. Their core function is to apply controllable tension to the yarn through a mechanical structure, ensuring that the yarn maintains a stable stretched state during movement. However, existing yarn rewinding devices generally adopt an active fixed structure, relying on external power sources such as motors and cylinders to drive the tension adjustment mechanism. This not only significantly increases the complexity and manufacturing cost of the equipment but also requires supporting power or air supply facilities, further increasing long-term energy consumption. More importantly, tension adjustment still requires manual operation, which is time-consuming and labor-intensive, and exhibits a certain degree of lag, making it difficult to compensate for dynamic changes in the yarn in real time. This severely restricts the efficiency and quality stability of fiberglass rotating bodies with fiber winding. Utility Model Content
[0003] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a weighted yarn return device that is free from manual intervention, highly stable, and can achieve real-time automatic compensation of yarn tension through dynamic gravity torque adjustment without the need for an external power source, so as to ensure that the yarn always maintains a stable tension state during movement.
[0004] The technical problem to be solved by this utility model is achieved through the following technical solution. This utility model is a weighted yarn return device, including a lifting and fixing plate. A synchronous belt pulley assembly is installed on the lifting and fixing plate. The synchronous belt pulley assembly includes two synchronous belt pulleys respectively installed on the upper and lower sides of the lifting and fixing plate. A synchronous belt that rotates and circulates with the synchronous belt pulleys is installed on the synchronous belt. A yarn return roller for cooperating with the yarn to realize the yarn return operation is installed on one side of the synchronous belt. A counterweight frame for supporting the counterweight is installed on the other side of the synchronous belt. A counterweight base is also installed on the lifting and fixing plate. A guide rod for guiding the vertical movement of the counterweight frame is installed on the counterweight base. The guide rod is vertically inserted through the counterweight frame. Several counterweights for cooperating with the counterweight frame to realize the yarn return tension balance adjustment are installed on the guide rod above the counterweight frame.
[0005] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned weighted yarn return device, the yarn return roller is installed on the synchronous belt through a yarn return roller bearing, a clamping plate and a clamping plate support. The clamping plate and the clamping plate support are clamped on the synchronous belt. The yarn return roller bearing is installed on the clamping plate support. A transversely arranged yarn return roller shaft is installed on the yarn return roller bearing. The yarn return roller is installed on the yarn return roller shaft through a deep groove bearing.
[0006] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the above-mentioned weighted yarn return device, a slider is installed on the clamping plate support, and a linear guide rail that slides and cooperates with the slider is installed on the lifting and fixing plate.
[0007] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned counterweight yarn return device, a buffer block for cooperating with the counterweight block frame is also installed on the lower part of the guide rod.
[0008] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned counterweight type yarn return device, the counterweight is mounted on the guide rod through a linear bearing slide, the linear bearing slide is slidably mounted on the guide rod through a linear bearing, and the counterweight is mounted on the linear bearing slide.
[0009] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned weighted yarn return device, the synchronous pulley is mounted on the lifting and fixing plate through the pulley bracket, the pulley shaft is mounted on the pulley bracket, and the synchronous pulley is mounted on the pulley shaft through the positioning sleeve and the deep groove bearing.
[0010] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned counterweight type yarn return device, the synchronous belt pulley assembly, counterweight block frame, and guide rod are arranged on one side of the lifting and fixing plate, the yarn return roller is arranged on the other side of the lifting and fixing plate, and a protective cover is also installed on the lifting and fixing plate on the side where the synchronous belt pulley assembly is located.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] 1. This utility model device does not require manual intervention and can automatically compensate for yarn tension in real time by means of dynamic gravity torque adjustment. When the yarn is moving, it can respond quickly no matter what the tension changes, so that the yarn is always stably stretched, which greatly improves the level of production automation, reduces the burden of manual operation, and avoids the errors that may occur due to manual adjustment.
[0013] 2. This utility model adopts a counterweight design, which uses gravity torque to adjust tension. It has a simple structure and stable operation. It is not easily affected by external environmental factors such as temperature and humidity, and can work reliably under various working conditions, providing a solid guarantee for stable yarn stretching. At the same time, it does not require an external power source, which reduces the complexity of the device and the number of failure points, reduces the risk of failure due to power problems, and improves reliability and service life.
[0014] 3. This utility model rationally sets up components such as synchronous pulley assembly and synchronous belt on the lifting and fixing plate. All parts work together to ensure smooth transmission between the synchronous pulley and synchronous belt. The return roller completes the return operation. The counterweight frame and counterweight adjust the tension, forming a complete and efficient structural system. The counterweight can also be flexibly added or removed according to actual needs to precisely adjust the yarn tension and meet diversified production requirements.
[0015] 4. This utility model ensures the quality of the fiber-wound fiberglass rotating body through stable yarn tension. This not only reduces problems such as strength reduction caused by uneven tension, but also improves the stability of product quality and enhances market competitiveness. Furthermore, it reduces labor and failure costs, improves production efficiency and product quality, reduces defect rate and scrap rate, and comprehensively reduces production costs, bringing better economic benefits to enterprises. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a side view of the structure of this utility model;
[0018] Figure 3 This is a top view of the structure of this utility model;
[0019] Figure 4 for Figure 2 A magnified view of the local structure;
[0020] Figure 5 This is a schematic diagram of the installation structure of the counterweight block of this utility model;
[0021] Figure 6 This is a schematic diagram of the protective cover of this utility model. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0023] Reference Figure 1-6 A weighted yarn return device is designed to automatically balance and adjust the tension during the yarn return process, ensuring that the yarn maintains a stable tension state throughout its movement. Specifically,
[0024] The device includes a lifting and fixing plate 1, which serves as the basic support structure for the entire device and provides a stable installation platform for other components.
[0025] A synchronous pulley 5 assembly is installed on the lifting fixed plate 1. The synchronous pulley 5 assembly includes two synchronous pulleys 5 respectively installed on the upper and lower sides of the lifting fixed plate 1. A synchronous belt 7 is installed on the synchronous pulleys 5 and rotates in a cycle as the synchronous pulleys 5 rotate. Preferably, the synchronous pulleys 5 are installed on the lifting fixed plate 1 through a pulley bracket 2. A pulley shaft 3 is installed on the pulley bracket 2. The synchronous pulleys 5 are installed on the pulley shaft 3 through a positioning sleeve 4 and a deep groove bearing 6.
[0026] A return roller 13 for cooperating with the yarn to realize the return operation is installed on one side of the synchronous belt 7. Preferably, the return roller 13 is installed on the synchronous belt 7 through a return roller bearing 10, a clamping plate 9 and a clamping plate support 8. The clamping plate 9 and the clamping plate support 8 are clamped on the synchronous belt 7. The return roller bearing 10 is installed on the clamping plate support 8. A return roller shaft 11 arranged laterally is installed on the return roller bearing 10. The return roller 13 is installed on the return roller shaft 11 through a deep groove bearing 12.
[0027] A slider 16 is installed on the clamping plate support 8, and a linear guide rail 15 that slides with the slider 16 is installed on the lifting and fixing plate 1. The cooperation between the slider 16 and the linear guide rail 15 can limit the lateral displacement of the return yarn roller 13, so that it always moves along the direction of the linear guide rail 15, thus ensuring the accuracy and stability of yarn return.
[0028] On the other side of the synchronous belt 7, a counterweight frame 17 for supporting the counterweight 18 is installed. A counterweight base 20 is also installed on the lifting and fixing plate 1. A guide rod 21 for guiding the counterweight frame 17 to move up and down is installed on the counterweight base 20. The guide rod 21 is set vertically through the counterweight frame 17. Several counterweights 18 are fitted on the guide rod 21 above the counterweight frame 17 to cooperate with the counterweight frame to achieve yarn tension balance adjustment. The counterweight frame 17, connected to the synchronous belt 7, can move up and down with the movement of the synchronous belt 7. The guide rod 21 ensures that the counterweight frame 17 moves in a straight line during the up and down movement without deviation or shaking, thus improving the operating accuracy and stability of the device. The counterweight 18 is used to press down on the counterweight frame 17, thereby facilitating the pulling of the return yarn roller 13 by the synchronous belt 7, so that the return yarn roller 13 can cooperate with the yarn to realize the return yarn operation. Preferably, the counterweight 18 is mounted on the guide rod 21 through a linear bearing slide 19, and the linear bearing slide 19 is slidably mounted on the guide rod 21 through a linear bearing 23, and the counterweight 18 is mounted on the linear bearing slide 19.
[0029] A buffer block 22 is also installed on the lower part of the guide rod 21 to cooperate with the counterweight frame 17. When the counterweight frame 17 moves downward to a certain position, the buffer block 22 can play a buffering role, reducing the impact force between the counterweight frame 17 and the counterweight base 20, and protecting the components of the device from damage.
[0030] The synchronous pulley 5 assembly, counterweight frame 17, and guide rod 21 are arranged on one side of the lifting and fixing plate 1, and the return roller 13 is arranged on the other side of the lifting and fixing plate 1. A protective cover 14 is also installed on the lifting and fixing plate 1 on the side where the synchronous pulley 5 assembly is located. The protective cover 14 can play a protective role, preventing external dust, debris, etc. from entering the device and affecting the normal operation of the device. At the same time, the protective cover 14 can also prevent the operator from accidentally touching the rotating synchronous pulley 5 and other components during the operation of the device, thus ensuring the personal safety of the operator.
[0031] The weighted spinning device provided in this application is mainly used in the fiberglass rotary winding industry, including but not limited to the production of fiberglass products such as fiberglass pipes, spindle bodies, and stepped tubes. Its actual working process is as follows:
[0032] According to the specifications of the yarn and the established production process requirements, the operator accurately installs the appropriate number and weight of counterweights 18 on the guide rod 21. At the same time, the yarn is introduced into the return yarn device, so that it passes around the return yarn roller 13. The return yarn roller 13 supports the yarn, the textile equipment is started, and the yarn begins to run.
[0033] During the yarn return process, the yarn tension will constantly change due to the unevenness of the yarn itself, the fluctuation of the textile equipment operation, and the influence of external environmental factors. For example, when the yarn passes through certain processing stages, the change in friction may lead to an increase in tension; while when the yarn supply speed is unstable, the tension will decrease.
[0034] When the yarn tension increases, the pulling force on the return roller 13 also increases. Once it exceeds the total weight of the counterweight frame 17 and the counterweight 18, the counterweight frame 17 will move upward along the guide rod 21, thereby pulling the return roller 13 downward to change its position, so that the yarn tension is relieved and eventually restored to the set tension range. Conversely, when the yarn tension decreases, the counterweight frame 17 will move downward and the return roller 13 will rise, which can also restore the tension.
[0035] Secondly, the slider 16 on the clamp support 8 and the linear guide rail 15 slide closely together, providing precise guidance for the return roller 13, effectively limiting its lateral displacement, and avoiding yarn entanglement and uneven tension caused by lateral swaying. In addition, when the counterweight frame 17 moves up and down to the limit position, the buffer block 22 at the bottom of the guide rod 21 can absorb the impact force, reduce the collision between the counterweight frame 17 and the counterweight base 20, protect the device components from damage, and extend the service life of the device.
Claims
1. A gravity return threader characterized by: The device includes a lifting and fixing plate, on which a synchronous belt pulley assembly is mounted. The synchronous belt pulley assembly includes two synchronous belt pulleys respectively mounted on the upper and lower sides of the lifting and fixing plate. A synchronous belt that rotates and circulates with the synchronous belt pulleys is mounted on the synchronous belt pulleys. A return roller for cooperating with the yarn to realize the return operation is mounted on one side of the synchronous belt. A counterweight frame for supporting counterweights is mounted on the other side of the synchronous belt. A counterweight base is also mounted on the lifting and fixing plate. A guide rod for guiding the vertical movement of the counterweight frame is mounted on the counterweight base. The guide rod is vertically inserted through the counterweight frame. Several counterweights for cooperating with the counterweight frame to realize the return tension balance adjustment are mounted on the guide rod above the counterweight frame.
2. The bobbin winder of claim 1 wherein: The return roller is mounted on the synchronous belt via a return roller bearing, a clamping plate, and a clamping plate support. The clamping plate and clamping plate support are clamped on the synchronous belt. The return roller bearing is mounted on the clamping plate support. A transversely arranged return roller shaft is mounted on the return roller bearing. The return roller is mounted on the return roller shaft via a deep groove bearing.
3. The counterweight-type yarn return device according to claim 2, characterized in that: A slider is installed on the clamping plate support, and a linear guide rail that slides with the slider is installed on the lifting fixed plate.
4. The counterweight-type yarn return device according to claim 1, characterized in that: A buffer block for cooperating with the counterweight block frame is also installed on the lower part of the guide rod.
5. The counterweight-type yarn return device according to claim 1, characterized in that: The counterweight is mounted on the guide rod via a linear bearing slide, and the linear bearing slide is slidably mounted on the guide rod via a linear bearing, with the counterweight mounted on the linear bearing slide.
6. The counterweight-type yarn return device according to claim 1, characterized in that: The synchronous pulley is mounted on the lifting and fixing plate via a pulley bracket. A pulley shaft is mounted on the pulley bracket, and the synchronous pulley is mounted on the pulley shaft via a positioning sleeve and a deep groove bearing.
7. The counterweight-type yarn return device according to claim 1, characterized in that: The synchronous belt pulley assembly, counterweight frame, and guide rod are located on one side of the lifting and fixing plate, and the return roller is located on the other side of the lifting and fixing plate. A protective cover is also installed on the lifting and fixing plate on the side where the synchronous belt pulley assembly is located.