Yarn tensioning mechanism of knitting machine

Abstract

The utility model relates to the technical field of knitting machines, in particular to a yarn tensioning mechanism of a knitting machine, which comprises a bottom plate, fixing bolts, a rotating seat, a torsion spring, a yarn guide ring, a yarn passing pipe and a tension sensor, two mounting holes are arranged on the bottom plate, the fixing bolts are arranged on two sides of the bottom plate in a screw mode, the rotating seat is rotatably arranged on the fixing bolts, and the torsion spring is arranged on the yarn guide ring. Torsion springs are connected between the rotating seats and the bottom plate, a plurality of wire guiding rings are installed on the rotating seats, the wire guiding rings on the two rotating seats are arranged in a staggered mode, and a wire passing pipe penetrates through one side of the bottom plate. When the knitting machine runs, the tension sensor detects tension of yarn and reports data to a computer system of the knitting machine, the system starts the servo motor, an output shaft of the servo motor drives the lead screw to rotate forwards or reversely, and multiple transverse traction on the yarn is achieved through the yarn guide rings on the two sides. Therefore, wide-range tension adjustment is realized in a limited space, and accurate control of yarn tension is ensured.

Description

Technical Field

[0001] This utility model relates to the field of knitting machine technology, and in particular to a yarn tensioning mechanism for a knitting machine. Background Technology

[0002] In the knitting machine industry, knitting machines and other equipment have high requirements for the stability of yarn tension. Excessive yarn tension may lead to yarn breakage and uneven fabric structure; while insufficient tension may lead to yarn loosening and fabric wrinkling.

[0003] Patent CN217732276U discloses a tensioning device for yarn tension in knitting equipment, comprising a housing with two guide rollers inside. The housing also has a groove with a slider slidably connected within it. An adjusting wheel is fixedly connected to the slider, and support plates are fixedly connected to both sides of the slider. One end of each support plate penetrates the housing and extends outward. This patent proposes using guide rollers to guide and support the yarn, then positioning the yarn above the adjusting wheel. To adjust the yarn tension, a threaded rod is rotated to cause the adjusting wheel to slide up and down. However, this method has some drawbacks. Due to the limited stroke of the threaded rod, the time required for the adjusting wheel to move up and down is relatively long each time tension is adjusted, resulting in a slow system response. This method is difficult to perform large-scale tension adjustments in a short time, especially in space-constrained situations, limiting its application in high-speed, high-precision knitting machines.

[0004] Therefore, it is necessary to design a yarn tensioning mechanism for a knitting machine. Utility Model Content

[0005] In order to overcome the shortcomings of existing patents, where the limited stroke of the threaded rod results in a relatively long time required for the adjusting wheel to move up and down each time the tension is adjusted, which means that the system response speed is slow and it is difficult to complete a large-scale tension adjustment in a short time, especially in the case of limited space, this limitation restricts its application effect on high-speed, high-precision knitting machines. This utility model provides a yarn tensioning mechanism for knitting machines.

[0006] The technical solution is as follows: A yarn tensioning mechanism for a knitting machine includes a base plate, fixing bolts, a rotating seat, a torsion spring, guide rings, a thread tube, and a tension sensor. The base plate has two mounting holes, and fixing bolts are screwed onto both sides of the base plate. A rotating seat is rotatably mounted on each fixing bolt. A torsion spring connects the rotating seat to the base plate. Multiple guide rings are mounted on the rotating seat, with the guide rings on the two rotating seats arranged alternately. A thread tube passes through one side of the base plate. A tension sensor is mounted on the end of one rotating seat furthest from the thread tube. The mechanism also includes a sliding rod, a connecting rod, a servo motor, and a lead screw. Two guide grooves are provided on the base plate. A sliding rod is fixedly connected to the bottom of the rotating seat and slides within adjacent guide grooves. A connecting rod is fixedly connected between two sliding rods. A servo motor is mounted on the bottom of the base plate, and a lead screw is connected to the output shaft of the servo motor via a coupling. The lead screw is threadedly connected to the base plate.

[0007] Preferably, the device also includes a mounting base, a limiting rod, a connecting base, and a screw. Two mounting bases are fixedly connected to the base plate. A limiting rod is slidably installed inside the mounting base. A limiting hole is opened on the rotating base. The limiting rod engages with the limiting hole on the adjacent rotating base. The ends of the two limiting rods away from the base plate are fixedly connected to the connecting base. A screw is rotatably installed on the top of the base plate. The screw is threadedly connected to the connecting base.

[0008] Preferably, the base plate also includes a fixing plate, guide rods, clamping plates, and elastic elements. Fixing plates are fixedly connected to both sides of the bottom of the base plate. Two guide rods are slidably arranged on the fixing plates. The clamping plates are fixedly connected to one end of the two guide rods located on the inner side of the base plate. An elastic element connects the fixing plates and the clamping plates.

[0009] Preferably, the clamping plate also includes a pad installed on the inside.

[0010] Preferably, it also includes a yarn-loosening ring, which is installed inside the thread tube.

[0011] Preferably, a ceramic ring is also included, with the ceramic ring embedded in the wire ring.

[0012] The beneficial effects of this invention are as follows: When the knitting machine is running, the tension sensor detects the tension of the yarn and reports the data to the computer system of the knitting machine. The system will start the servo motor, and the output shaft of the servo motor will drive the lead screw to rotate forward or backward, so that multiple guide rings on both sides can perform multiple lateral traction on the yarn, thereby achieving a wide range of tension adjustment within a limited space and ensuring precise control of the yarn tension. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2This is a three-dimensional sectional view of the base plate, base, and fixing bolts of this utility model.

[0015] Figure 3 This is a three-dimensional sectional view of the base plate, servo motor, and connecting rod of this utility model.

[0016] Figure 4 This is a three-dimensional structural diagram of the base plate, rotating seat, and threading port of this utility model.

[0017] Figure 5 This is a three-dimensional structural diagram of the base plate, fixing plate, and clamping plate of this utility model.

[0018] The above-mentioned attached drawings include the following reference numerals: 1. Base plate; 101. Mounting hole; 2. Fixing bolt; 3. Rotary seat; 301. Limiting hole; 4. Torsion spring; 5. Wire ring; 501. Ceramic ring; 6. Through-line tube; 7. Tension sensor; 8. Guide groove; 9. Slide rod; 10. Connecting rod; 11. Servo motor; 12. Lead screw; 13. Mounting seat; 14. Limiting rod; 15. Connecting seat; 16. Screw; 17. Fixing plate; 18. Guide rod; 19. Clamping plate; 20. Elastic element; 21. Pad; 22. Loosening ring. Detailed Implementation

[0019] The embodiments of this utility model will be described below with reference to the accompanying drawings.

[0020] Example 1: A yarn tensioning mechanism for a knitting machine, see reference. Figures 1-3As shown, the device includes a base plate 1, fixing bolts 2, a rotating seat 3, a torsion spring 4, guide rings 5, a guide tube 6, and a tension sensor 7. It also includes a slide rod 9, a connecting rod 10, a servo motor 11, and a lead screw 12. Two mounting holes 101 are opened in the center of the base plate 1. Fixing bolts 2 are screwed onto both sides of the base plate 1. A rotating seat 3 is rotatably mounted on each fixing bolt 2. A torsion spring 4 connects the rotating seat 3 to the base plate 1 and is sleeved on the fixing bolt 2. Multiple guide rings 5 ​​are mounted on the rotating seat 3. A ceramic ring 501 is embedded inside each guide ring 5. The ceramic ring 501 reduces the friction between the guide ring 5 and the yarn, preventing dust from being generated during yarn transport. The guide rings 5 ​​on the two rotating seats 3 intersect... The incorrect setup includes a threaded tube 6 running through the rear side of the base plate 1, with a yarn-loosening ring 22 installed inside the threaded tube 6. The yarn-loosening ring 22 is used to remove lint and dust from the surface of the yarn, making the yarn surface clean. A tension sensor 7 is installed at the far front of the rotating seat 3 on the right side of the base plate 1 via bolts. It also includes a slide rod 9, a connecting rod 10, a servo motor 11, and a lead screw 12. Two guide grooves 8 are provided on the base plate 1. The bottom of the rotating seat 3 is fixedly connected to the slide rod 9, which slides in the adjacent guide grooves 8. A connecting rod 10 is fixedly connected between the two slide rods 9. The bottom of the base plate 1 is fixedly connected to the servo motor 11 via bolts. The output shaft of the servo motor 11 is connected to the lead screw 12 via a coupling. The lead screw 12 is threadedly connected to the base plate 1.

[0021] When yarn tension adjustment is required, firstly, use bolts to fix the base plate 1 to the yarn feed assembly of the knitting machine through the mounting hole 101. Next, pass the yarn through the guide tube 6, and then through the guide rings 5 ​​on the two rotating seats 3 in sequence to form an "S" shaped yarn path. After that, let the yarn pass over the tension sensor 7, and finally pass through the yarn feeder of the knitting machine. When the knitting machine is running, the yarn pressure will squeeze the tension sensor 7. The tension sensor 7 detects the yarn tension and reports the data to the computer system of the knitting machine to determine whether the yarn tension meets the set requirements. If the yarn tension is too high, the system will start the servo motor 11. The output shaft of the servo motor 11 drives the lead screw 12 to rotate. The movement causes the connecting rod 10 to move forward, pushing the slide bar 9 forward along the guide groove 8. This action causes the two rotating seats 3 to rotate slightly inward, resulting in the deformation of the torsion spring 4. At the same time, the guide ring 5 also rotates inward, thereby reducing the tension of the yarn. Conversely, when the yarn tension is insufficient, the servo motor 11 rotates in the opposite direction, causing the lead screw 12 to drive the connecting rod 10 to move backward, and the slide bar 9 to retract along the guide groove 8. This causes the torsion spring 4 to return to its original shape and drive the rotating seat 3 to rotate outward, increasing the tension of the yarn. Multiple lateral traction of the yarn is achieved through multiple guide rings 5 ​​on both sides, thereby realizing a wide range of tension adjustment within a limited space and ensuring precise control of the yarn tension.

[0022] Example 2: Based on Example 1, refer to Figure 4 As shown, it also includes a mounting base 13, a limiting rod 14, a connecting base 15, and a screw 16. Two mounting bases 13 are fixedly connected to the base plate 1 by welding. The limiting rod 14 is slidably provided in the mounting base 13. The rotating base 3 has a limiting hole 301. The limiting rod 14 is engaged with the limiting hole 301 on the adjacent rotating base 3. The upper ends of the two limiting rods 14 are fixedly connected to the connecting base 15. The top of the base plate 1 is rotatably provided with a screw 16, which is threadedly connected to the connecting base 15.

[0023] When this device is not in use, rotate the rotating seat 3 inward to reduce the size of the clamp between the two rotating seats 3. When the rotating seat 3 rotates to below the limiting hole 301, rotate the screw 16. The screw 16 drives the guide rod 18 to slide down along the mounting seat 13 through the fixing plate 17, so that the guide rod 18 is inserted into the limiting hole 301, thereby limiting the rotating seat 3 and preventing the two rotating seats 3 from swinging back and forth during transportation.

[0024] See Figure 5 As shown, it also includes a fixed plate 17, guide rods 18, clamping plate 19, and elastic element 20. Fixed plates 17 are fixedly connected to both sides of the bottom of the base plate 1. Two guide rods 18 are slidably arranged on the fixed plate 17. The clamping plate 19 is fixedly connected to one end of the two guide rods 18 located on the inner side of the base plate 1. Elastic element 20 is connected between the fixed plate 17 and the clamping plate 19. A pad 21 is installed on the inner side of the clamping plate 19. The pad 21 is used to increase the friction between the clamping plate 19 and the knitting machine and improve the stability of the device.

[0025] When it is necessary to fix the base plate 1, the clamping plate 19 is slid outward. The clamping plate 19 drives the fixing plate 17 to slide outward through the guide rod 18. The clamping plate 19 compresses the elastic element 20 and deforms. Then, the base plate 1 is placed on the mounting frame of the yarn conveying assembly of the knitting machine. The clamping plate 19 is released, and the elastic element 20 returns to its original shape, causing the clamping plate 19 and the guide rod 18 to slide inward and reset. This allows the clamping plate 19 to clamp the mounting frame, so as to quickly install the base plate 1.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A yarn tensioning mechanism for a knitting machine, characterized in that it includes: The device includes a base plate (1), fixing bolts (2), rotating seats (3), torsion springs (4), wire rings (5), a conduit (6), and a tension sensor (7). The base plate (1) has two mounting holes (101). Fixing bolts (2) are screwed onto both sides of the base plate (1). A rotating seat (3) is mounted on each fixing bolt (2). A torsion spring (4) connects the rotating seat (3) to the base plate (1). Multiple wire rings (5) are mounted on the rotating seat (3). The wire rings (5) on the two rotating seats (3) are staggered. A conduit (6) runs through one side of the base plate (1), with one of the rotating wire rings... A tension sensor (7) is installed at the end of the seat (3) away from the conduit (6). It also includes a slide rod (9), a connecting rod (10), a servo motor (11), and a lead screw (12). Two guide grooves (8) are provided on the base plate (1). The bottom of the rotating seat (3) is fixedly connected to the slide rod (9). The slide rod (9) slides in the adjacent guide groove (8). A connecting rod (10) is fixedly connected between the two slide rods (9). A servo motor (11) is installed at the bottom of the base plate (1). The output shaft of the servo motor (11) is connected to the lead screw (12) through a coupling. The lead screw (12) is threadedly connected to the base plate (1).

2. The yarn tensioning mechanism of a knitting machine according to claim 1, characterized in that, It also includes a mounting base (13), a limiting rod (14), a connecting seat (15), and a screw (16). Two mounting bases (13) are fixedly connected to the base plate (1). The mounting base (13) is slidably provided with a limiting rod (14). A limiting hole (301) is opened on the rotating seat (3). The limiting rod (14) is engaged with the limiting hole (301) on the adjacent rotating seat (3). The two limiting rods (14) are fixedly connected to the connecting seat (15) at the ends away from the base plate (1). A screw (16) is rotatably provided on the top of the base plate (1). The screw (16) is threadedly connected to the connecting seat (15).

3. A yarn tensioning mechanism for a knitting machine according to claim 2, characterized in that, It also includes a fixed plate (17), a guide rod (18), a clamping plate (19) and an elastic element (20). The fixed plate (17) is fixedly connected to both sides of the bottom of the base plate (1). Two guide rods (18) are slidably arranged on the fixed plate (17). The clamping plate (19) is fixedly connected to one end of the two guide rods (18) located on the inner side of the base plate (1). An elastic element (20) is connected between the fixed plate (17) and the clamping plate (19).

4. A yarn tensioning mechanism for a knitting machine according to claim 3, characterized in that, It also includes a pad (21), and the pad (21) is installed on the inside of the clamp (19).

5. A yarn tensioning mechanism for a knitting machine according to claim 4, characterized in that, It also includes a yarn-loosening ring (22), which is installed inside the thread tube (6).

6. A yarn tensioning mechanism for a knitting machine according to claim 5, characterized in that, It also includes a ceramic ring (501), and the ceramic ring (501) is embedded in the wire ring (5).

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