Yarn tension control system of warp knitting machine

Abstract

The invention relates to the technical field of warp knitting machines, in particular to a yarn tension control system of a warp knitting machine, which comprises an adjusting mechanism, the adjusting mechanism comprises a motor, the output end of the motor is rotatably connected with a first gear, the end face of the first gear is rotatably engaged with a second gear, and the surfaces of the first gear and the second gear are provided with first connecting rods; second connecting rods are rotatably connected to the surfaces of the first connecting rods, third connecting rods are rotatably connected to the surfaces of the second connecting rods, grooves are formed in the side walls of the mounting seats, springs are arranged on the bottom surfaces of the grooves, sliding seats are arranged at the top ends of the springs, and first yarn guide rollers are rotatably mounted on the side walls of the sliding seats. According to the yarn guide roller, the contact area is increased, the pressure on the area is reduced, abrasion and deformation of the yarn caused by too large local pressure are effectively reduced, after the contact area is increased, friction force between the yarn and the first yarn guide roller is distributed more evenly, and the problem of hairiness yarn breakage caused by too large local friction is avoided.

Description

Technical Field

[0001] This invention relates to the field of warp knitting machines, specifically to a yarn tension control system for warp knitting machines. Background Technology

[0002] In the textile industry, warp knitting machines are an important piece of equipment used to produce various fabrics. The yarn tension control system of the warp knitting machine is a key device to ensure that the yarn tension is stable and uniform during the knitting process, which directly affects the knitting quality and production efficiency.

[0003] For example, a Chinese patent discloses a tension compensation device and tension control system for a warp knitting machine, with application number CN202120081157.7. It includes: a yarn guide, a movable ceramic eye, a fixed ceramic eye, and an elastic element; the yarn guide and the fixed ceramic eye are sequentially fixed; the movable ceramic eye is movably disposed between the yarn guide and the fixed ceramic eye; the yarn is wound around the yarn guide and passes through the movable ceramic eye and the fixed ceramic eye sequentially; the elastic element is connected to the movable ceramic eye. In summary, this allows the entire tension control system to adjust the yarn tension in a timely manner, ensuring that the yarn tension remains constant during warp knitting and that the knitting quality is stable.

[0004] However, while the aforementioned patent can guide the yarn, the contact area between the yarn and the guiding component is small, resulting in high friction. High friction can cause the yarn to break or come off during the guiding process. Furthermore, the wear and deformation caused by excessive local pressure on the yarn can reduce the production quality of the yarn. Summary of the Invention

[0005] The purpose of this invention is to provide a yarn tension control system for warp knitting machines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a yarn tension control system for a warp knitting machine, comprising: a base, a first mounting frame provided on the surface of the base, an adjustment mechanism provided on the side wall of the first mounting frame, the adjustment mechanism comprising: a motor, a first gear rotatably connected to the output end of the motor, a second gear meshing and rotating on the end face of the first gear, a first connecting rod provided on the surface of both the first gear and the second gear, a second connecting rod rotatably connected to the surface of the first connecting rod, and a third connecting rod rotatably connected to the surface of the second connecting rod; The mounting base has a groove on its side wall, a spring on the bottom surface of the groove, a slide on the top of the spring, and a first yarn guide roller rotatably mounted on the side wall of the slide. The surface of the first yarn guide roller is provided with a yarn guide groove.

[0007] Preferably, there are two sets of the first gear and the second gear, and the two sets of the first gear and the second gear are symmetrically distributed about the center line of the first yarn guide roller. There are two sets of the first connecting rod, the second connecting rod and the third connecting rod are symmetrically distributed about the center line of the first yarn guide roller.

[0008] Preferably, a shaft is fixedly installed on the inner side of the first mounting frame. Two sets of shafts are provided, and the shafts are symmetrically distributed about the center line of the first yarn guide roller. Two sets of third connecting rods are rotatably installed on the outer surface of the shafts.

[0009] Preferably, the first mounting frame is provided in two sets, and the second yarn guide roller is rotatably mounted between the two sets of the first mounting frame. The mounting seat is fixedly mounted on the surface of the third connecting rod. The mounting seat is provided in two sets, and the two sets of mounting seats are symmetrically distributed about the center line of the second yarn guide roller.

[0010] Preferably, the slide block is elastically connected to the upper end face of the spring, and the two sets of first yarn guide rollers slide up and down inside the groove by compressing the spring through the slide block.

[0011] Preferably, the yarn guide grooves are provided in multiple sets, and the multiple sets of yarn guide grooves are arranged linearly at equal intervals with respect to the surface of the first yarn guide roller.

[0012] Preferably, a rotating rod is rotatably mounted on the inner side of the first mounting frame, and a third gear is provided at both ends of the rotating rod. The third gear meshes with the first gear and rotates, and a yarn-supporting roller is sleeved on the outer surface of the rotating rod.

[0013] Preferably, the inner surface of the mounting base is embedded with bearings, and the two ends of the two sets of first yarn guide rollers are rotatably mounted with the bearings.

[0014] Preferably, a second mounting bracket is fixedly mounted on the upper surface of the base, and a warp knitting tube is rotatably mounted on the side surface of the second mounting bracket.

[0015] Preferably, a protective cover is fixedly installed on the outer side of the first mounting bracket, the protective cover is clamped on the outer surface of the first gear and the second gear, and the motor is fixedly installed on the side surface of the protective cover.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The yarn tension control system for warp knitting machines proposed in this invention; 1. The drive motor causes the first gear to rotate, which in turn causes the two symmetrically arranged first connecting rods to rotate, which in turn causes the first yarn guide rollers on the sidewall of the third connecting rod to rotate in opposite directions. This increases the contact area of ​​the yarn in the yarn guide groove, which can disperse the tension on the yarn and reduce the pressure on the area. This effectively reduces the wear and deformation of the yarn caused by excessive local pressure. With the increased contact area, the friction between the yarn and the first yarn guide roller is more evenly distributed, avoiding the problem of fuzz and yarn breakage caused by excessive local friction. By setting a slide and a spring in the groove in the mounting base, and the slide and the spring are elastically connected, when the yarn tension changes, the slide can compress the spring to automatically adjust the position of the first yarn guide roller, so that the yarn remains stable between the first yarn guide rollers, thereby maintaining the uniformity of tension and compensating for yarn tension fluctuations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the initial structure of the adjustment mechanism of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 This is a schematic diagram of the adjusted structure of the adjustment mechanism of the present invention after adjustment; Figure 5 For the present invention Figure 1 Enlarged view of a section at point B in the middle; Figure 6 For the present invention Figure 1 Enlarged view of a section at point C.

[0018] In the diagram: 1. Base; 2. First mounting frame; 3. Adjustment mechanism; 301. Motor; 302. First gear; 303. Second gear; 304. First connecting rod; 305. Second connecting rod; 306. Third connecting rod; 307. Shaft; 308. Mounting seat; 309. Groove; 310. Slide seat; 311. Spring; 312. First yarn guide roller; 313. Yarn guide groove; 4. Rotating rod; 5. Third gear; 6. Yarn support roller; 7. Second yarn guide roller; 8. Bearing; 9. Second mounting frame; 10. Warp knitting cylinder; 11. Protective cover. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 6 This invention provides a technical solution: a yarn tension control system for a warp knitting machine; The yarn tension control system of the warp knitting machine includes: a base 1, a first mounting frame 2 on the surface of the base 1, an adjustment mechanism 3 on the side wall of the first mounting frame 2, the adjustment mechanism 3 including: a motor 301, a first gear 302 rotatably connected to the output end of the motor 301, a second gear 303 meshing and rotating on the end face of the first gear 302, a first connecting rod 304 on the surface of both the first gear 302 and the second gear 303, a second connecting rod 305 rotatably connected to the surface of the first connecting rod 304, and a third connecting rod 306 rotatably connected to the surface of the second connecting rod 305; a groove 309 on the side wall of the mounting base 308, a spring 311 on the bottom surface of the groove 309, a slide 310 on the top of the spring 311, a first guide roller 312 rotatably mounted on the side wall of the slide 310, and a guide groove 313 on the surface of the first guide roller 312.

[0021] Two sets of first gears 302 and second gears 303 are provided, symmetrically distributed about the center line of the first yarn guide roller 312. Two sets of first connecting rods 304, second connecting rods 305, and third connecting rods 306 are provided, symmetrically distributed about the center line of the first yarn guide roller 312. Two sets of shafts 307 are fixedly installed on the inner side of the first mounting frame 2, symmetrically distributed about the center line of the first yarn guide roller 312. Two sets of third connecting rods 306 are rotatably mounted on the shafts 307. The outer surface of 07; two sets of first mounting brackets 2 are provided, and a second yarn guide roller 7 is rotatably mounted between the two sets of first mounting brackets 2; mounting base 308 is fixedly mounted on the surface of the third connecting rod 306; two sets of mounting bases 308 are provided, and the two sets of mounting bases 308 are symmetrically distributed about the center line of the second yarn guide roller 7; the slide 310 is elastically connected to the upper end face of the spring 311; the two sets of first yarn guide rollers 312 slide up and down inside the groove 309 through the compression of the spring 311 by the slide 310; multiple sets of yarn guide grooves 313 are provided, and the multiple sets of yarn guide grooves 313 are equidistantly linearly arranged about the surface of the first yarn guide roller 312.

[0022] A rotating rod 4 is rotatably mounted on the inner side of the first mounting frame 2. A third gear 5 is provided at both ends of the rotating rod 4. The third gear 5 meshes with the first gear 302 and rotates. A yarn-supporting roller 6 is sleeved on the outer surface of the rotating rod 4. Bearings 8 are embedded in the inner surface of the mounting base 308. The two ends of the two sets of first yarn-guided rollers 312 are rotatably mounted with the bearings 8. A second mounting frame 9 is fixedly mounted on the upper surface of the base 1. A warp knitting bobbin 10 is rotatably mounted on the side surface of the second mounting frame 9. A protective cover 11 is fixedly mounted on the outer side of the first mounting frame 2. The protective cover 11 is clamped on the outer surface of the first gear 302 and the second gear 303. The motor 301 is fixedly mounted on the side surface of the protective cover 11. Example

[0023] To disperse the tension on the yarn and reduce friction, an adjustment mechanism 3 is provided on the side wall of the first mounting frame 2. The adjustment mechanism 3 includes: a motor 301, with a first gear 302 rotatably connected to the output end of the motor 301; a second gear 303 meshing with the end face of the first gear 302; first connecting rods 304 on the surfaces of both the first gear 302 and the second gear 303; second connecting rods 305 rotatably connected to the surfaces of the first connecting rods 304; and third connecting rods 306 rotatably connected to the surfaces of the second connecting rods 305. 03 is provided with two sets of gears, the first gear 302 and the second gear 303 are symmetrically distributed about the center line of the first yarn guide roller 312. There are two sets of first connecting rods 304, second connecting rods 305 and third connecting rods 306, which are symmetrically distributed about the center line of the first yarn guide roller 312. The inner side of the first mounting frame 2 is fixedly installed with shafts 307, and there are two sets of shafts 307, which are symmetrically distributed about the center line of the first yarn guide roller 312. The two sets of third connecting rods 306 are rotatably installed on the outer surface of shafts 307. The drive motor 301 drives the first gear 302 to rotate the second gear 303, which in turn drives the two symmetrically arranged first connecting rods 304 to rotate the second connecting rod 305. This causes the first yarn guide rollers 312 on the side wall of the third connecting rod 306 to rotate in opposite directions. This increases the contact area of ​​the yarn in the yarn guide groove 313, which can disperse the tension on the yarn and reduce the pressure on the area. This effectively reduces the wear and deformation of the yarn caused by excessive local pressure. After the contact area is increased, the friction between the yarn and the first yarn guide roller 312 is more evenly distributed, avoiding the problem of fuzz and yarn breakage caused by excessive local friction. Example

[0024] In order to maintain the uniformity of tension and compensate for yarn tension fluctuations, based on Embodiment 1, a groove 309 is provided on the side wall of the mounting base 308, a spring 311 is provided on the bottom surface of the groove 309, a slide block 310 is provided on the top of the spring 311, a first yarn guide roller 312 is rotatably mounted on the side wall of the slide block 310, a yarn guide groove 313 is provided on the surface of the first yarn guide roller 312, the slide block 310 is elastically connected to the upper end face of the spring 311, and the two sets of first yarn guide rollers 312 slide up and down inside the groove 309 by compressing the spring 311 through the slide block 310; By setting a slide block 310 and a spring 311 in the groove 309 within the mounting base 308, and elastically connecting the slide block 310 and the spring 311, when the yarn tension changes, the slide block 310 can compress the spring 311 to automatically adjust the position of the first yarn guide roller 312, so that the yarn remains stable between the first yarn guide rollers 312, thereby maintaining the uniformity of tension and compensating for yarn tension fluctuations. Example

[0025] In order to achieve synchronous transmission of the two sets of adjustment mechanisms 3 driven by the motor 301, a rotating rod 4 is rotatably installed on the inner side of the first mounting frame 2. A third gear 5 is provided at both ends of the rotating rod 4. The third gear 5 meshes with the first gear 302 and rotates. A yarn support roller 6 is sleeved on the outer surface of the rotating rod 4. The first gear 302 is driven by the drive motor 301 to mesh and rotate the third gear 5, which in turn drives the two sets of adjustment mechanisms 3 that are symmetrically arranged on the center line of the first yarn guide roller 312 to drive synchronously. The rotation of the rotating rod 4 drives the yarn support roller 6 sleeved on the outer surface of the rotating rod 4 to rotate synchronously, which facilitates the support of the yarn and has a guiding effect.

[0026] Unlike existing warp knitting machine tension compensation devices that rely solely on the elasticity of elastic elements to adjust yarn tension, these devices struggle to precisely control the yarn tension, leading to significant tension fluctuations. This is particularly problematic when the required yarn feed rate changes frequently, as the elastic elements cannot respond promptly and accurately. Furthermore, the small contact area causes wear and deformation of the yarn due to excessive localized pressure, resulting in uneven friction distribution between the yarn and the guide roller, indirectly causing yarn hairiness and breakage. This invention, through synchronous adjustment, increases the contact area of ​​the yarn in the guide groove 313, dispersing the tension on the yarn and reducing pressure over the area. This effectively reduces wear and deformation caused by excessive localized pressure. With an increased contact area, the friction distribution between the yarn and the first guide roller 312 is more uniform, preventing hairiness and breakage caused by excessive localized friction.

[0027] Working principle: In actual use, the yarn on the yarn bobbin is first passed through the yarn support roller 6 to support the yarn. Then, multiple yarns are passed through the yarn guide groove 313 on the first yarn guide roller 312 for guidance. During the yarn guiding process, in order to disperse the tension on the yarn and reduce the friction on the yarn, the drive motor 301 drives the first gear 302 to rotate the second gear 303, which in turn causes the two symmetrically arranged first connecting rods 304 to rotate the second connecting rod 305. This causes the first yarn guide rollers 312 on the side wall of the third connecting rod 306 to rotate in opposite directions, increasing the contact area of ​​the yarn in the yarn guide groove 313, which can disperse the tension on the yarn, reduce the pressure on the area, and effectively reduce the friction caused by the yarn. The increased contact area reduces wear and deformation caused by excessive pressure, resulting in a more uniform distribution of friction between the yarn and the first guide roller 312. This avoids problems such as fuzzing and yarn breakage caused by excessive local friction. The yarn may bounce up and down during the guiding process. To maintain tension uniformity and compensate for yarn tension fluctuations, a slide block 310 and a spring 311 are set in the groove 309 within the mounting base 308. The slide block 310 and the spring 311 are elastically connected. When the yarn tension changes, the slide block 310 can compress the spring 311 to automatically adjust the position of the first guide roller 312, keeping the yarn stable between the first guide rollers 312, thereby maintaining tension uniformity and compensating for yarn tension fluctuations.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A yarn tension control system for a warp knitting machine, characterized in that: include: A base (1) is provided with a first mounting bracket (2) on its surface. An adjustment mechanism (3) is provided on the side wall of the first mounting bracket (2). The adjustment mechanism (3) includes a motor (301). A first gear (302) is rotatably connected to the output end of the motor (301). A second gear (303) is meshed and rotated on the end face of the first gear (302). A first connecting rod (304) is provided on the surface of both the first gear (302) and the second gear (303). A second connecting rod (305) is rotatably connected to the surface of both the first connecting rod (304). A third connecting rod (306) is rotatably connected to the surface of both the second connecting rod (305). Mounting base (308), the side wall of mounting base (308) is provided with groove (309), the bottom surface of groove (309) is provided with spring (311), the top of spring (311) is provided with slide (310), the side wall of slide (310) is rotatably mounted with first yarn guide roller (312), the surface of first yarn guide roller (312) is provided with yarn guide groove (313).

2. The yarn tension control system for a warp knitting machine according to claim 1, characterized in that: The first gear (302) and the second gear (303) are provided in two sets. The two sets of the first gear (302) and the second gear (303) are symmetrically distributed about the center line of the first yarn guide roller (312). The first connecting rod (304), the second connecting rod (305) and the third connecting rod (306) are provided in two sets, and the first connecting rod (304), the second connecting rod (305) and the third connecting rod (306) are symmetrically distributed about the center line of the first yarn guide roller (312).

3. The yarn tension control system for a warp knitting machine according to claim 1, characterized in that: The first mounting bracket (2) has a shaft (307) fixedly installed on its inner side. There are two sets of shafts (307), and the shafts (307) are symmetrically distributed about the center line of the first yarn guide roller (312). Two sets of third connecting rods (306) are rotatably installed on the outer surface of the shafts (307).

4. The yarn tension control system for a warp knitting machine according to claim 1, characterized in that: The first mounting frame (2) is provided in two sets, and the second yarn guide roller (7) is rotatably installed between the two sets of the first mounting frame (2). The mounting seat (308) is fixedly installed on the surface of the third connecting rod (306). The mounting seat (308) is provided in two sets, and the two sets of mounting seats (308) are symmetrically distributed about the center line of the second yarn guide roller (7).

5. The yarn tension control system for a warp knitting machine according to claim 1, characterized in that: The slide block (310) is elastically connected to the upper end face of the spring (311), and the two sets of first yarn guide rollers (312) slide up and down inside the groove (309) through the slide block (310) compressing the spring (311).

6. The yarn tension control system for a warp knitting machine according to claim 1, characterized in that: The yarn guide groove (313) is provided in multiple sets, and the multiple sets of yarn guide grooves (313) are arranged linearly at equal intervals with respect to the surface of the first yarn guide roller (312).

7. The yarn tension control system for a warp knitting machine according to claim 1, characterized in that: A rotating rod (4) is rotatably mounted on the inner side of the first mounting frame (2). A third gear (5) is provided at both ends of the rotating rod (4). The third gear (5) meshes with the first gear (302) and rotates. A yarn support roller (6) is sleeved on the outer surface of the rotating rod (4).

8. The yarn tension control system for a warp knitting machine according to claim 1, characterized in that: The inner surface of the mounting base (308) is embedded with bearings (8), and the two ends of the two sets of first yarn guide rollers (312) are rotatably mounted with the bearings (8).

9. The yarn tension control system for a warp knitting machine according to claim 1, characterized in that: The upper surface of the base (1) is fixedly mounted with a second mounting bracket (9), and the side surface of the second mounting bracket (9) is rotatably mounted with a warp knitting tube (10).

10. The yarn tension control system for a warp knitting machine according to claim 1, characterized in that: A protective cover (11) is fixedly installed on the outside of the first mounting bracket (2). The protective cover (11) is clamped on the outer surface of the first gear (302) and the second gear (303). The motor (301) is fixedly installed on the side surface of the protective cover (11).

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