A yarn feeding mechanism for a circular knitting machine

Abstract

The utility model discloses a circular knitting machine yarn feeding mechanism, including feed yarn ring, yarn nozzle seat and yarn nozzle, wherein yarn nozzle includes the embedding portion, the connecting portion and the yarn guide portion that connect gradually, and the embedding portion embeds yarn nozzle seat bottom and fixes through the mounting seat, and the connecting portion is the half arch bridge type structure of gradually smaller from top to bottom width, and the width of yarn guide portion is 3~5 knitting needle interval, and its width direction is equipped with the yarn guide hole, and the front side protrudes and is equipped with the limit post, the left side of mounting seat is equipped with the first thread passing component including the support rod and the thread guide pulley, and the right side is equipped with the second thread passing component including the support ring and the thread passing column, the utility model discloses through the half arch bridge type connecting portion and make the end yarn guide portion only need 3~5 knitting needle interval's width, and through the cooperation of yarn guide hole, limit post and the first, second thread passing component, while reserving the thread passing requirement of the yarn nozzle multi -stranded yarn, greatly reduce the end width of yarn nozzle, effectively avoid yarn nozzle needle knock, and reduce the debugging difficulty, and then improve the knitting quality and cutting type efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of textile equipment technology, and specifically relates to a yarn feeding mechanism for a circular knitting machine. Background Technology

[0002] The circular edge knitting machine is one of the most commonly used textile equipment. During operation, the yarn is fed to the appropriate position through a yarn feeding mechanism fixed on the yarn feeding ring of the circular knitting machine. Since most circular edge knitting machines use warp and weft knitting methods, at least two strands of yarn pass through the same yarn feeding nozzle. To avoid interference between the yarns, the end of the yarn feeding nozzle is usually equipped with two or more yarn guide holes. Correspondingly, the end of the yarn feeding nozzle is usually quite wide to accommodate the adjustment of the yarn feeding angle, typically reaching the width of a quarter cycle of the knitting needle array below. In actual operation, the distance between the yarn feeding nozzle and the knitting needle array is small, and slight vibrations and displacements are unavoidable during the operation of the knitting needle array. This causes the yarn feeding nozzle of this structure to frequently experience needle collisions and yarn breakage, affecting the knitting quality. Especially when changing to a new knitting pattern, the adjustment precision requirements are extremely high, leading to significant needle loss and low cutting efficiency during the adjustment process. Utility Model Content

[0003] The purpose of this invention is to propose a yarn feeding mechanism for a circular knitting machine, in order to solve the problem that existing yarn feeding nozzles, in order to adapt to the guidance of multi-strand yarns, usually have relatively wide ends, which leads to high adjustment difficulty and abnormal phenomena such as needle collision and yarn breakage, affecting cutting efficiency and knitting quality.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model discloses a yarn feeding mechanism for a circular knitting machine, including a yarn feeding ring, a yarn nozzle seat, and a yarn feeding nozzle. The yarn nozzle seat is fixed on the yarn feeding ring. The yarn feeding nozzle includes an embedding part, a connecting part, and a yarn guiding part. The embedding part is embedded and fixed in the bottom of the yarn nozzle seat. The connecting part is connected to the embedding part and the yarn guiding part at both ends, respectively. The connecting part has a semi-arched bridge-shaped structure with a width that gradually decreases from top to bottom. The arc surface of the connecting part is concave towards the yarn output direction. The width of the yarn guiding part is set to 3 to 5 knitting needle spacings. A yarn guiding hole is provided through the yarn guiding part along the width direction. A limiting post protrudes from the front side of the yarn guiding part, and the limiting post is located above the yarn guiding hole. The yarn feeding nozzle is connected by a mounting base. A connecting yarn feeder seat is provided, and the mounting base is located on the outside of the yarn feeder seat. The yarn feeder seat and the embedded part are respectively provided with fixing holes. The mounting base is provided with a first fastening bolt that mates with the fixing holes. A first yarn guide assembly is provided on the left side of the mounting base. The first yarn guide assembly includes a support rod and a yarn guide wheel. The yarn guide wheel is rotatably located at the end of the support rod. The support rod is located on the mounting base. A second yarn guide assembly is provided on the right side of the mounting base. The second yarn guide assembly includes a support ring and a yarn guide post. The upper end of the support ring is located on the mounting base, and the lower end is annular. The yarn guide post is embedded in the end of the support ring and fixed. The second yarn guide assembly is used in conjunction with the yarn guide hole.

[0006] Based on the above technical solution, by setting the yarn feeder to an arc-shaped structure that gradually tapers from top to bottom, and providing a yarn guide hole along the width direction and a limiting post protruding to the front on the yarn guide part at the end of the yarn feeder, in conjunction with the mounting base located at the connection between the yarn feeder and the yarn feeder seat, and the first and second yarn guide components respectively provided on its left and right sides, some yarn is provided through the first yarn guide component without occupying the space at the end of the yarn feeder. This can achieve the functional requirement of retaining the yarn feeder to pass at least two strands of yarn, while greatly reducing the width of the end of the yarn feeder, effectively avoiding the phenomenon of the yarn feeder hitting the needle, reducing the difficulty of debugging, and thus improving the knitting quality and cutting efficiency.

[0007] Preferably, the end of the yarn guide is bent towards the yarn feeding direction to form a hook, and the yarn guide hole is opened at the bend of the hook. The axis of the yarn guide hole is parallel to the center line of the hook. The purpose of this design is to make the yarn guide hole avoid the yarn output direction, shorten the contact length between the yarn and the yarn guide hole, and thus reduce yarn loss and yarn tension fluctuation.

[0008] Preferably, the front side of the yarn guide is recessed, and a limiting step is formed between the yarn guide and the connecting part. A certain height gap is reserved between the limiting post and the limiting step. The purpose of this design is to increase the number of yarn passing positions on the yarn guide with a limited width, increase the number of yarn passing strands of the yarn feeder, and adapt to more complex weaving.

[0009] Preferably, the limiting post is I-shaped, including end rings at both ends and a shaft in the middle. A rolling element is sleeved on the shaft. The outer wall of the rolling element is wavy or has multiple sets of convex rings to form multiple thread guide positions. This design achieves rolling thread guide through the rolling element to match the real-time changes in tension, reduce thread loss, and increase the number of thread strands passing through the yarn feeder to adapt to more complex weaving.

[0010] In a further preferred embodiment, each end of the rolling element is provided with an adjusting spring, which is sleeved on the shaft. One end of the adjusting spring is connected to the rolling element, and the other end is connected to the end ring. This design reduces yarn breakage caused by uneven tension by absorbing the real-time fluctuation of yarn tension and resetting the rolling element through the adjusting spring.

[0011] Preferably, the fixing hole is a beaded structure composed of multiple interconnected annular holes, and each annular hole is provided with an internal thread that mates with the first fastening bolt. The purpose of this design is to achieve the adjustability of the overall height of the yarn feed nozzle through the adjustable fixing hole.

[0012] Preferably, the mounting base has a first through hole on its left side for the support rod to pass through. The support rod can be adjusted up and down relative to the first through hole. The mounting base has a second through hole that connects to the first through hole. A second fastening bolt is provided in the second through hole. The end of the second fastening bolt abuts against the support rod to fix it. The purpose of this design is to adjust the feeding angle by adjusting the height of the thread guide wheel to adapt to different weaving process requirements and ensure weaving quality.

[0013] Preferably, the mounting base has an inner countersunk hole on its right side along the width direction, and the upper end of the support ring is embedded in the inner countersunk hole. An angle adjustment component is provided between the support ring and the mounting base. The angle adjustment component includes an outer toothed ring and an inner toothed ring that fit together. The outer toothed ring is located on the support ring, and the inner toothed ring is located in the inner countersunk hole. The purpose of this design is to make the second yarn guide component angle adjustable to adapt to different tension adjustment requirements and to adjust the yarn inlet direction of the yarn guide hole, thereby reducing yarn loss.

[0014] Further preferably, a return spring is provided at the innermost side of the inner countersunk hole. One end of the return spring is fixed to the inner countersunk hole, and the other end is fixed to the end of the support ring. The return spring is used to prevent the outer toothed ring from dislodging from the inner toothed ring. This design, through the setting of the return spring, ensures that when the second yarn guide assembly is subjected to yarn tension and tends to move outward, the outer toothed ring and the inner toothed ring are always kept in a mutually engaged position, thereby maintaining the adjustment angle.

[0015] Preferably, the thread guide post is T-shaped or I-shaped and is made of a flexible material, such as rubber, silicone, or silicone rubber. This design utilizes the elastic deformation and restoring force of the flexible thread guide post to balance the tension fluctuations when the yarn passes through, so that the thread tension is maintained within a certain fixed range, effectively reducing the frequency of yarn breakage.

[0016] Beneficial effects

[0017] One of the above technical solutions has the following advantages or beneficial effects:

[0018] 1) To address the problem that existing yarn feeders, designed to accommodate multi-strand yarns, typically have a wide end, leading to high adjustment difficulty and abnormal phenomena such as needle collisions and yarn breakage, thus affecting cutting efficiency and knitting quality, the yarn feeder is designed as an arc-shaped structure that gradually tapers from top to bottom. The yarn guide section at the end of the yarn feeder is set to a width of only 3 to 5 knitting needle spacings, with only one yarn guide hole along the width direction and a forward-protruding limiting post. In conjunction with the first and second yarn guide components on the left and right sides of the mounting base, some yarn is supplied through the first yarn guide component without occupying the space at the end of the yarn feeder. This achieves the requirement of the yarn feeder passing at least two strands of yarn while greatly reducing the width of the end of the yarn feeder, effectively avoiding needle collisions, reducing adjustment difficulty, and thus improving knitting quality and cutting efficiency. 2) To address the issue of non-adjustable yarn feeding parameters such as the height of the yarn feeder and the angle of the yarn feeder, which prevents its applicability to different weaving processes, the yarn feeder and the yarn feeder seat are connected by beaded fixing holes. The first yarn guide assembly is adjustable up and down and mounted on the mounting base, while the second yarn guide assembly is adjustable at the angle and mounted on the mounting base. These structural improvements allow for the adjustment of the overall height of the yarn feeder and the yarn inlet angle, thereby enabling the same equipment to adapt to different weaving processes and ensure reliable weaving quality.

[0019] 3) By using flexible materials for the yarn guide post and incorporating rolling elements on the limit post, the yarn feeding mechanism can dynamically match real-time tension fluctuations during actual operation, making it less prone to yarn breakage and effectively reducing the frequency of downtime maintenance, which is beneficial to improving production efficiency and weaving quality. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0023] Figure 3 This is a schematic diagram of the exploded structure of this utility model. Figure 1 ;

[0024] Figure 4 This is a schematic diagram of the exploded structure of this utility model. Figure 2 ;

[0025] Figure 5 This is a partial cross-sectional structural diagram of the present invention;

[0026] Figure 6 This is a schematic diagram of the limiting column structure in Embodiment 2 of this utility model;

[0027] In the diagram: Knitting needle 100; yarn feeder 1; yarn nozzle seat 2; fixing hole 21; ring hole 211; yarn feeder 3; embedding part 31; connecting part 32; arc surface 321; yarn guide part 33; return hook part 34; yarn guide hole 35; limiting post 36; end ring 361; shaft 362; rolling element 363; adjusting spring 364; limiting step 37; mounting base 4; first through hole 41; second through hole 42; inner countersunk hole 43; first fastening bolt 5; second fastening bolt 6; first thread guide assembly 7; support rod 71; thread guide wheel 72; second thread guide assembly 8; support ring 81; thread guide post 82; angle adjustment assembly 9; external toothed ring 91; internal toothed ring 92; return spring 93. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0029] Example 1

[0030] like Figures 1-4As shown, this embodiment provides a yarn feeding mechanism for a circular knitting machine, including a yarn feeding ring 1, a yarn nozzle seat 2, and a yarn feeding nozzle 3. The yarn nozzle seat 2 is fixed on the yarn feeding ring 1. The yarn feeding nozzle 3 includes an embedding part 31, a connecting part 32, and a yarn guiding part 33. The embedding part 31 is embedded and fixed in the bottom of the yarn nozzle seat 2. The bottom of the yarn nozzle seat 2 is provided with a U-shaped groove (not shown in the figure) that mates with the embedding part 31. The two ends of the connecting part 32 are respectively connected to the embedding part 31 and the yarn guiding part 33. The connecting part 32 has a semi-arched bridge structure with a width that gradually decreases from top to bottom. The arc surface 321 of the connecting part 32 is concave towards the yarn output direction to avoid interfering with the yarn entry. The width of the yarn guiding part 33 is set to 3 to 5 knitting needle spacings to balance the installation stability of the yarn feeding nozzle 3 and relative... The knitting needles 100 have the smallest possible contact width. The spacing between knitting needles 100 refers to the distance between two adjacent knitting needles 100 in the knitting mechanism. When the model of the round edge machine is determined, this spacing is generally a fixed value. The yarn guide part 33 is provided with a yarn guide hole 35 through it along the width direction so that the yarn can pass smoothly from left to right, rather than from back top to front bottom, which can reduce the friction of the yarn when passing through. Preferably, the end of the yarn guide part 33 is bent towards the yarn feeding direction to form a hook part 34. The yarn guide hole 35 is opened at the bend of the hook part 34. The axis of the yarn guide hole 35 is parallel to the center line of the hook part 34 so that the yarn guide hole 35 avoids the yarn in the yarn output direction, shortens the contact length between the yarn and the yarn guide hole 35, and thus reduces the amount of yarn loss and yarn tension fluctuation. The front side of the yarn guide 33 is further provided with a limiting post 36. The limiting post 36 is located above the yarn guide hole 35 and away from the knitting needle 100. Below the limiting post 36, a yarn passage position different from the yarn guide hole 35 can be formed, replacing the multiple yarn guide holes 35 of the original yarn feeder 3, and reducing the width requirement of the yarn feeder 3. Preferably, as Figure 3 As shown, the front of the yarn guide 33 is recessed, and a limiting step 37 is formed between the yarn guide 33 and the connecting part 32. A certain height gap is reserved between the limiting post 36 and the limiting step 37 to form a new yarn guide position, allowing the yarn feeder 3 to match more yarn strands and adapt to more complex weaving processes. To reduce yarn friction, the edges of the limiting step 37 are all chamfered.

[0031] The yarn feeding nozzle 3 is connected to the yarn nozzle seat 2 via a mounting base 4. The mounting base 4 is located on the outside of the yarn nozzle seat 2. The yarn nozzle seat 2 and the embedded part 31 are respectively provided with fixing holes 21. The mounting base 4 is provided with a first fastening bolt 5 that mates with the fixing hole 21. The yarn nozzle seat 2 and the yarn feeding nozzle 3 are relatively fixed by the first fastening bolt 5 being inserted into the fixing hole 21. Preferably, refer to Figure 3The fixing hole 21 is a beaded structure composed of multiple interconnected annular holes 211. Each annular hole 211 has an internal thread (not shown in the figure) that mates with the first fastening bolt 5. The overall height of the yarn feed nozzle 3 is adjustable by inserting the first fastening bolt 5 into different annular holes 211. A first yarn guide assembly 7 is provided on the left side of the mounting base 4 (i.e., in the yarn inlet direction). The first yarn guide assembly 7 is used to cooperate with the limiting post 36 to realize the yarn feeding operation of multiple strands of yarn. The first yarn guide assembly 7 includes a support rod 71 and a yarn guide wheel 72. The yarn guide wheel 72 is rotatably mounted on the end of the support rod 71, and the support rod 71 is mounted on the mounting base 4. The mounting base 4 has a second thread guide assembly 8 on its right side. The second thread guide assembly 8 is used to cooperate with the yarn guide hole 35 on the next yarn feeder 3. The second thread guide assembly 8 includes a support ring 81 and a thread guide post 82. The upper end of the support ring 81 is located on the mounting base 4, and the lower end is annular. The thread guide post 82 is embedded in the end of the support ring 81 for fixation. Preferably, the thread guide post 82 is T-shaped or I-shaped. The thread guide post 82 is made of flexible materials with elastic deformation force and recovery force, such as rubber, silicone, or silicone rubber, to balance the tension fluctuation of the yarn when it passes through the yarn during operation and reduce the frequency of yarn breakage.

[0032] Furthermore, to facilitate the adjustment of yarn tension during the adjustment and debugging of the yarn feeding angle, both the first yarn guide assembly 7 and the second yarn guide assembly 8 are adjustablely fitted with the mounting base 4.

[0033] Specifically, the adjustable structure of the first wire guide assembly 7 is as follows: the left side of the mounting base 4 is provided with a first through hole 41 for the support rod 71 to pass through, the support rod 71 can be adjusted up and down relative to the first through hole 41, the mounting base 4 is provided with a second through hole 42 communicating with the first through hole 41, a second fastening bolt 6 is provided in the second through hole 42, and the end of the second fastening bolt 6 abuts against the support rod 71 to achieve fixation.

[0034] The adjustable structure of the second wire guide component 8 is specifically as follows: Figures 4-5As shown, the mounting base 4 has an inner countersunk hole 43 on its right side along the width direction. The upper end of the support ring 81 is embedded in the inner countersunk hole 43. An angle adjustment component 9 is provided between the support ring 81 and the mounting base 4. The angle adjustment component 9 includes an outer toothed ring 91 and an inner toothed ring 92 that fit together. The number of teeth on the outer toothed ring 91 and the inner toothed ring 92 is determined according to the angle adjustment accuracy. The outer toothed ring 91 is fixedly or detachably mounted on the support ring 81, and the inner toothed ring 92 is fixedly or detachably mounted in the inner countersunk hole 43. Preferably, a return spring 93 is also provided at the innermost side of the inner countersunk hole 43. One end of the return spring 93 is fixed to the inner countersunk hole 43, and the other end is fixed to the end of the support ring 81. The return spring 93 is used to prevent the outer toothed ring 91 from dislodging from the inner toothed ring 92. The angle adjustment process of the second wire guide assembly 8 is as follows: Before operation or when the angle needs to be adjusted, pull out the support ring 81 so that the outer toothed ring 91 is disengaged from the limit of the inner toothed ring 92. The return spring 93 is stretched accordingly. After adjusting a certain angle, the outer toothed ring 91 and the inner toothed ring 92 are re-engaged and fixed. During operation, due to the tensile elastic force of the return spring 93, the outer toothed ring 91 can only maintain the position of being engaged with the inner toothed ring 92, and will not be disengaged due to the force on the support ring 81.

[0035] Example 2

[0036] like Figure 6 As shown, this embodiment provides a yarn feeding mechanism for a circular knitting machine, which differs from Embodiment 1 in that:

[0037] Instead of the fixed limiting post 36 in Embodiment 1, the limiting post 36 in this embodiment is I-shaped, including end rings 361 at both ends and a shaft 362 in the middle. A rolling element 363 is sleeved on the shaft 362. The outer wall of the rolling element 363 is wavy or has multiple sets of convex rings to form multiple line positions. In this embodiment, the outer wall of the rolling element 363 is wavy.

[0038] Preferably, the rolling element 363 is provided with adjusting springs 364 at both ends. The adjusting springs 364 are sleeved on the shaft 362. One end of the adjusting spring 364 is connected to the rolling element 363, and the other end is connected to the end ring 361, so as to absorb the real-time fluctuation of yarn tension and reset the rolling element 363.

[0039] The advantage of this embodiment is that by setting a rolling element 363 on the limiting post 36, the yarn passing through the limiting post 36 can roll through the yarn and adapt to the tension changes at different times in a rolling manner, so as to avoid the yarn breaking due to excessive tension. At the same time, by setting a wave-shaped setting or multiple sets of convex rings on the surface of the rolling element 363 to form multiple mutually separated yarn passing positions, the number of yarn passing strands of the yarn feeder 3 can be increased to adapt to more complex weaving.

[0040] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A yarn feeding mechanism for a circular knitting machine, comprising a yarn feeding ring, a yarn nozzle seat, and a yarn feeding nozzle, wherein the yarn nozzle seat is fixed on the yarn feeding ring, characterized in that: The yarn feeder includes an embedding part, a connecting part, and a yarn guide part. The embedding part is embedded and fixed at the bottom of the yarn feeder seat. The connecting part connects the embedding part and the yarn guide part at both ends, respectively. The connecting part has a semi-arched bridge-shaped structure with a width that gradually decreases from top to bottom. The arc-shaped surface of the connecting part is concave towards the yarn output direction. The width of the yarn guide part is set to 3-5 knitting needle spacings. A yarn guide hole is provided through the yarn guide part along its width direction. A limiting post protrudes from the front side of the yarn guide part, and the limiting post is located above the yarn guide hole. The yarn feeder is connected to the yarn feeder seat through a mounting base located on the outside of the yarn feeder seat. The nozzle seat and the embedded part are respectively provided with fixing holes. The mounting base is provided with a first fastening bolt that mates with the fixing hole. The left side of the mounting base is provided with a first thread guide assembly. The first thread guide assembly includes a support rod and a thread guide wheel. The thread guide wheel is rotatably disposed at the end of the support rod. The support rod is disposed on the mounting base. The right side of the mounting base is provided with a second thread guide assembly. The second thread guide assembly includes a support ring and a thread guide post. The upper end of the support ring is disposed on the mounting base, and the lower end is annular. The thread guide post is embedded in the end of the support ring and fixed. The second thread guide assembly is used in conjunction with the yarn guide hole.

2. The yarn feeding mechanism of a circular knitting machine according to claim 1, characterized in that: The end of the yarn guide is bent toward the yarn feeding direction to form a hook section, and the yarn guide hole is opened at the bend of the hook section. The axis of the yarn guide hole is parallel to the center line of the hook section.

3. The yarn feeding mechanism of a circular knitting machine according to claim 1, characterized in that: The front side of the yarn guide is recessed, and a limiting step is formed between the yarn guide and the connecting part. A certain height gap is reserved between the limiting post and the limiting step.

4. The yarn feeding mechanism of a circular knitting machine according to claim 1, characterized in that: The limiting post is I-shaped and includes end rings at both ends and a shaft in the middle. A rolling element is sleeved on the shaft. The outer wall of the rolling element is wavy or has multiple sets of convex rings to form multiple line positions.

5. The yarn feeding mechanism of a circular knitting machine according to claim 4, characterized in that: The rolling element is provided with adjusting springs at both ends. The adjusting springs are sleeved on the shaft. One end of the adjusting spring is connected to the rolling element, and the other end is connected to the end ring.

6. The yarn feeding mechanism of a circular knitting machine according to claim 1, characterized in that: The fixing hole is a beaded structure composed of multiple interconnected annular holes, and each annular hole is provided with an internal thread that mates with the first fastening bolt.

7. The yarn feeding mechanism of a circular knitting machine according to claim 1, characterized in that: The mounting base has a first through hole on its left side for the support rod to pass through. The support rod can be adjusted up and down relative to the first through hole. The mounting base has a second through hole that connects to the first through hole. A second fastening bolt is provided in the second through hole, and the end of the second fastening bolt abuts against the support rod to achieve fixation.

8. The yarn feeding mechanism of a circular knitting machine according to claim 1, characterized in that: The mounting base has an inner countersunk hole on its right side along the width direction. The upper end of the support ring is embedded in the inner countersunk hole. An angle adjustment component is provided between the support ring and the mounting base. The angle adjustment component includes an outer toothed ring and an inner toothed ring that fit together. The outer toothed ring is located on the support ring, and the inner toothed ring is located in the inner countersunk hole.

9. The yarn feeding mechanism of a circular knitting machine according to claim 8, characterized in that: A return spring is also provided at the innermost side of the inner countersunk hole. One end of the return spring is fixed to the inner countersunk hole, and the other end is fixed to the end of the support ring. The return spring is used to prevent the outer toothed ring from dislodging from the inner toothed ring.

10. A yarn feeding mechanism for a circular knitting machine according to claim 1, characterized in that: The wire guide post is T-shaped or I-shaped, and the wire guide post is made of a flexible material, such as rubber, silicone, or silicone rubber.

Images