A device for regulating the tension of a warp bobbin

Abstract

The utility model provides a device for adjusting the tension of warp yarn bobbin, including yarn bobbin axle, tension pulley, friction band, weight, pulley, spring mechanism and yarn bobbin frame, the tension pulley fixed mounting in yarn bobbin axle's rear end, with yarn bobbin axle synchronous rotation, the friction band is wound in the outer circumferential surface of tension pulley, with the tension pulley forms the friction fit, one end of friction band hangs the weight, and the other end is connected with spring mechanism transmission through pulley, the device passes through the weight and spring mechanism cooperation and regulation the friction between friction band and tension pulley, and then control yarn bobbin's rotating speed, realize the adjustment of warp tension, through the structure of " weight + spring " cooperation and regulation friction damping force, can accurate control yarn bobbin rotating speed, ensure that the warp yarn tension is uniform, fundamentally avoid the quality defect such as broken yarn, cloth face hole, significantly improve the fabric qualified rate.

Description

Technical Field

[0001] This utility model relates to the field of advanced manufacturing and automation, specifically to a device for adjusting the tension of warp yarn bobbins. Background Technology

[0002] Circular knitting machines, as core equipment in the textile industry for producing knitted fabrics, are currently in a critical stage of scale expansion and technological upgrading. In existing technologies, to save space, the warp bobbin holders of circular knitting machines are generally arranged in a front-to-back layout, drawing the warp yarns into the knitting machine for weaving operations.

[0003] However, this front-to-back traction structure has a significant drawback: when the warp threads are drawn out from yarn bobbins at different positions, inconsistent thread tension is easily caused by factors such as the length of the traction path and differences in the rotational resistance of the yarn bobbins. This problem directly triggers a series of chain reactions, seriously affecting production efficiency and product quality. Frequent fabric quality defects: Uneven tension can cause yarn to be under unbalanced stress during weaving, resulting in quality problems such as yarn breakage and holes in the fabric, and the proportion of substandard fabrics has increased significantly. Increased equipment damage and downtime frequency: When tension changes abruptly, the impact force of the yarn on the internal components of the braiding machine (such as yarn guides and knitting needles) increases, which can easily cause wear or damage to the equipment components; at the same time, problems such as yarn breakage and holes force the machine to stop frequently, and workers need to spend a lot of time re-threading and repairing the fabric, resulting in a significant reduction in effective production time. Production efficiency and delivery schedule are affected: substandard fabrics need to be reworked, which not only wastes raw materials such as cotton yarn, but also takes up extra production time; in order to improve tension issues, technicians need to repeatedly check mechanical parts and adjust process parameters, which lengthens the debugging cycle before production and directly affects the order delivery schedule.

[0004] In summary, existing circular warp and weft knitting machines lack a device that can effectively and uniformly control the tension of the warp yarn bobbins. The aforementioned problem has become a key bottleneck restricting the improvement of production efficiency and the stability of product quality in textile enterprises. Utility Model Content

[0005] This invention provides a device for adjusting the tension of warp yarn bobbins, aiming to solve the problems mentioned in the background art.

[0006] This invention is implemented as follows: a device for adjusting the tension of warp yarn bobbins includes a bobbin shaft, a tensioning wheel, a friction belt, a counterweight, a pulley, a spring mechanism, and a bobbin frame. The tensioning wheel is fixedly installed at the rear end of the bobbin shaft and rotates synchronously with the bobbin shaft. The friction belt is wound around the outer circumference of the tensioning wheel, forming a frictional engagement with the tensioning wheel. One end of the friction belt suspends the counterweight, and the other end is connected to the spring mechanism via the pulley. The spring mechanism is mounted on a shaft head, and the bobbin shaft is fixedly connected to the bobbin frame. The device adjusts the friction between the friction belt and the tensioning wheel through the coordinated action of the counterweight and the spring mechanism, thereby controlling the rotation speed of the bobbin and achieving the adjustment of warp yarn tension.

[0007] Preferably, the counterweight is a replaceable structure. By replacing the counterweight with one of different weights, the tension of the friction belt on the tensioning wheel can be adjusted to meet the tension requirements of different warp threads.

[0008] Preferably, the friction belt is made of a highly wear-resistant and flexible material, and the inner circumferential surface of the friction belt is provided with anti-slip texture to enhance the frictional stability with the tensioning wheel.

[0009] Preferably, the spring mechanism includes a spring and a shaft head connector. One end of the spring is fixed by the shaft head connector, and the other end is connected to the pulley. The spring is always in a tensioned state to ensure that the friction belt is in close contact with the tensioning pulley.

[0010] Preferably, it also includes a yarn eye, which is located on the yarn path between the yarn bobbin shaft and the circular warp and weft knitting machine, and is used to guide the warp yarn out smoothly and reduce additional yarn friction.

[0011] Preferably, the connection structure of the yarn bobbin shaft, tension wheel, friction belt, counterweight, pulley and spring mechanism is integrated into a single design. The device is fully compatible with the yarn bobbin frame of a circular warp and weft knitting machine, and has a simple structure and reliable operation.

[0012] Due to the adoption of the above solution, the beneficial effects of this utility model are: Solving the problem of uneven tension and improving fabric quality: By using a structure that uses a "weight + spring" to adjust the friction damping force, the rotation speed of the yarn bobbin can be precisely controlled, ensuring that the warp yarn tension is uniform and consistent, fundamentally avoiding quality defects such as yarn breakage and fabric holes, and significantly improving the fabric qualification rate. Reduce downtime and rework, and improve production efficiency: After the tension is stabilized, the frequency of machine downtime due to yarn breakage and quality problems is greatly reduced, and workers do not need to frequently thread the warp or repair the fabric. At the same time, the rework rate decreases, reducing raw material waste and extra working hours, effectively extending the effective production time and improving overall production efficiency. The structure is simple and reliable, reducing the cost of use and maintenance: the core components of the device are only mechanical structures such as yarn bobbin shaft, tension wheel, and friction belt, without complex electronic components, making it suitable for the humid and dusty working environment of textile workshops. It has few points of failure and is easy to assemble; subsequent maintenance only requires periodic inspection of friction belt wear or replacement of counterweights, resulting in low maintenance costs and easy operation. Highly adaptable and flexible in adjustment: By replacing the weights of different weights, it can quickly adapt to the tension requirements of different materials and warp threads of different thicknesses without modifying the overall structure of the device; at the same time, the setting of the thread eye further reduces tension fluctuations during yarn transmission, ensuring the stability of the tension adjustment effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the spring mechanism and pulley drive of this application.

[0014] Figure 2 This is a schematic diagram of the assembly of the yarn bobbin shaft and tensioner wheel in this application. Among them, 1-yarn bobbin shaft, 2-tensioning wheel, 3-friction belt, 4-counterweight, 5-spring, 6-yarn bobbin frame shaft, 7-pulley, 8-bobbin frame Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] like Figure 1 and Figure 2As shown, a device for adjusting the tension of warp yarn bobbins includes a bobbin shaft 1, a tensioning wheel 2, a friction belt 3, a counterweight 4, a pulley 7, a spring mechanism, and a bobbin frame 8. The tensioning wheel 2 is fixedly installed at the rear end of the bobbin shaft 1 and rotates synchronously with the bobbin shaft 1. The friction belt 3 is wound around the outer circumference of the tensioning wheel 2, forming a frictional engagement with the tensioning wheel 2. One end of the friction belt 3 suspends the counterweight 4, and the other end is connected to the spring mechanism via the pulley 7. The spring mechanism is mounted on the shaft head, and the bobbin shaft 1 is fixedly connected to the bobbin frame 8. The device adjusts the friction force between the friction belt 3 and the tensioning wheel 2 through the coordinated action of the counterweight 4 and the spring mechanism, thereby controlling the rotation speed of the bobbin and adjusting the warp tension. The counterweight 4 is replaceable; by replacing the counterweight 4 with different weights, the tension of the friction belt 3 on the tensioning wheel 2 can be adjusted to adapt to the tension requirements of different warp yarns. The friction belt 3 is made of a highly wear-resistant and flexible material. The inner circumferential surface of the friction belt 3 has anti-slip textures to enhance frictional stability with the tension wheel 2. The spring mechanism includes a spring 5 and a shaft connector 10. One end of the spring 5 is fixed via the shaft connector 10, and the other end is connected to the pulley 7. The spring 5 is always under tension to ensure a tight fit between the friction belt 3 and the tension wheel 2. The device also includes a yarn eye 9, which is located on the yarn path between the yarn bobbin shaft 1 and the circular warp and weft knitting machine. This guides the warp yarns out smoothly, reducing additional yarn friction. The connection structure of the yarn bobbin shaft 1, tension wheel 2, friction belt 3, counterweight 4, pulley 7, and spring mechanism is integrated. The entire device is compatible with the yarn bobbin frame 8 of the circular warp and weft knitting machine, featuring a simple structure and reliable operation.

[0017] Specifically, (I) Assembly steps of the device 1. Fixing the yarn bobbin frame and yarn bobbin shaft: Install the bobbin frame 8 at the preset position of the warp feed end of the circular warp and weft braiding machine, and connect one end of the yarn bobbin shaft 1 to the yarn bobbin frame shaft 6 through a bearing to ensure that the yarn bobbin shaft 1 can rotate flexibly and that the axis is parallel to the warp traction direction of the braiding machine; 2. Install the tension wheel and friction belt: Fix the tension wheel 2 to the rear end of the yarn bobbin shaft 1 by key connection, ensuring that the tension wheel 2 and the yarn bobbin shaft 1 are coaxial and rotate synchronously; wrap the friction belt 3 (a wear-resistant rubber belt with anti-slip texture on the inner circumference) around the outer circumference of the tension wheel 2, with 1.5-2 turns to ensure the friction contact area; 3. Connect the weight and the pulley: Suspend the weight 4 at one end of the friction belt 3 (initially select a 500g weight, which can be replaced with a 300g-1000g weight as needed), and install the pulley 7 on the path at the other end of the friction belt 3 so that the friction belt 3 turns after passing around the pulley 7, ensuring that the vertical tension of the weight 4 is converted into pressure along the tangential direction of the tension wheel. 4. Assemble the spring mechanism: Fix one end of the spring 5 to the shaft head of the yarn tube frame shaft 6 through the shaft head connector, and connect the other end to the end of the friction belt 3 that passes over the pulley 7. Adjust the pre-compression of the spring 5 so that the friction belt 3 can still fit tightly against the tension wheel 2 when there is no counterweight pulling force. 5. Install a ceramic eyelet: Fix a ceramic eyelet on the yarn path between the yarn bobbin (sleeved on the yarn bobbin shaft 1) and the yarn inlet of the braiding machine to ensure that the yarn can pass through the ceramic eyelet in a straight line after being led out of the yarn bobbin and enter the braiding machine.

[0018] Two-Tension Adjustment and Working Process 1. Initial tension setting: Determine the target tension value based on the material of the warp yarn to be woven, such as cotton yarn, polyester yarn, and its fineness, such as 21 count or 32 count. If it is coarse cotton yarn, a larger tension is required. Replace the 1000g weight 4 and increase the friction by increasing the tension of the friction belt 3, thereby reducing the speed of the yarn bobbin and increasing the warp tension. If it is fine polyester yarn, a smaller tension is required. Replace the 300g weight 4 and reduce the friction, thereby slightly increasing the speed of the yarn bobbin and decreasing the warp tension. 2. Normal weaving operation: Start the circular warp and weft weaving machine. The weaving machine pulls the warp yarn through the traction mechanism. The warp yarn is led out from the yarn bobbin and passes through the yarn eye in sequence into the weaving machine. At this time, the yarn bobbin drives the yarn bobbin shaft 1 to rotate synchronously with the tension wheel 2. Under the combined action of the weight 4 and the spring 5, the friction belt 3 generates a stable friction force with the tension wheel 2, forming a damping force to resist the rotation of the tension wheel 2, so that the speed of the yarn bobbin matches the traction speed of the weaving machine, and the warp yarn comes out with a constant tension. 3. Long-term operation and maintenance: After 8 hours of continuous operation, check whether the friction belt 3 and tension wheel 2 are covered with yarn dust. If there is accumulation, clean it with compressed air. If the friction belt 3 shows obvious wear, such as the disappearance of the anti-slip texture, simply replace it with a new friction belt. There is no need to disassemble other parts, making maintenance convenient.

[0019] The above description of the embodiments is intended to enable those skilled in the art to understand and use the present invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments. Any improvements and modifications made by those skilled in the art based on the principles of the present invention without departing from its scope should be within the protection scope of the present invention. The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for adjusting the tension of warp yarn bobbins, characterized in that, The device includes a yarn bobbin shaft, a tensioning wheel, a friction belt, a counterweight, a pulley, a spring mechanism, and a yarn bobbin frame. The tensioning wheel is fixedly installed at the rear end of the yarn bobbin shaft and rotates synchronously with it. The friction belt is wound around the outer circumference of the tensioning wheel, forming a frictional engagement with it. One end of the friction belt suspends the counterweight, and the other end is connected to the spring mechanism via the pulley. The spring mechanism is mounted on a shaft head, and the yarn bobbin shaft is fixedly connected to the yarn bobbin frame. The device adjusts the friction between the friction belt and the tensioning wheel through the coordinated action of the counterweight and the spring mechanism, thereby controlling the rotation speed of the yarn bobbin and adjusting the warp tension.

2. The device for adjusting the tension of warp yarn bobs according to claim 1, characterized in that, The weight is replaceable; by replacing the weight with one of different weights, the tension of the friction belt on the tensioning wheel can be adjusted to meet the tension requirements of different warp threads.

3. The device for adjusting the tension of warp yarn bobs according to claim 1, characterized in that, The friction belt is made of a highly wear-resistant and flexible material, and the inner circumferential surface of the friction belt is provided with anti-slip texture to enhance the frictional stability with the tensioning wheel.

4. The device for adjusting the tension of warp yarn bobs according to claim 1, characterized in that, The spring mechanism includes a spring and a shaft connector. One end of the spring is fixed by the shaft connector, and the other end is connected to the pulley. The spring is always in a tensioned state to ensure that the friction belt is in close contact with the tensioning pulley.

5. The device for adjusting the tension of warp yarn bobs according to claim 1, characterized in that, It also includes a yarn eye, which is located on the yarn path between the yarn bobbin shaft and the circular warp and weft knitting machine, and is used to guide the warp yarn out smoothly and reduce additional yarn friction.

6. The device for adjusting the tension of warp yarn bobs according to any one of claims 1-5, characterized in that, The connection structure of the yarn bobbin shaft, tension wheel, friction belt, counterweight, pulley and spring mechanism is integrated. The device is adapted to the yarn bobbin frame of a circular warp and weft knitting machine. It has a simple structure and reliable operation.

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