A cam device for a double knitting circular knitting machine

Abstract

The utility model discloses a kind of triangular device of double-sided knitted circular knitting machine, including triangle body, curve slide for the heel of knitting machine needle sliding is provided on the triangle body, detachable groove-like piece is embedded in the inner wall of curve slide, the material of groove-like piece is polytetrafluoroethylene, groove-like piece is set along the extension direction of curve slide, and the length of groove-like piece is consistent with the effective sliding length of curve slide, the inner wall of groove-like piece is adapted with the sliding path of curve slide, and the outer periphery profile of groove-like piece is in contact with the inner wall profile of curve slide.This technical scheme is used to solve the problem of existing large circular machine triangle existence lubricating oil pollution and wear.

Description

Technical Field

[0001] This utility model belongs to the field of textile equipment technology, specifically relating to a triangular device for a double-sided circular knitting machine. Background Technology

[0002] Double-sided circular knitting machines are core equipment widely used in the knitting industry. Their triangular block assembly is a key component controlling the movement trajectory of the knitting needles, directly affecting the knitting quality and the operational stability of the equipment. In existing technologies, the triangular block typically has a curved slide with a specific contour. The needle heel is embedded in this slide. Through the fixed installation of the triangular block and the cyclic movement of the knitting needle, precise movements such as lifting, lowering, and translating of the needle are achieved, thereby completing knitting actions such as loop formation, loop gathering, and floating yarn.

[0003] Currently, the industry commonly uses metal materials to manufacture the triangular blocks and knitting needles. For example, the triangular blocks are often made of wear-resistant metals such as alloy steel and cast iron, while the knitting needles are often made of materials such as high-carbon steel and stainless steel. However, there are significant technical defects in the contact fit between metals: on the one hand, the coefficient of friction between the two is relatively high. During the high-speed operation of a double-sided circular knitting machine, the needle heel and the inner wall of the curved slide of the triangular block will generate continuous sliding friction, which will inevitably lead to wear of the contact surface after long-term operation. As the wear accumulates, the contour accuracy of the curved slide decreases, and the movement trajectory of the knitting needle deviates from the preset path, causing problems such as inaccurate needle positioning. Specifically, this manifests as quality defects such as uneven fabric loop size and disordered weave. In severe cases, metal debris generated by wear will accumulate in the slide, or the knitting needle may become stuck due to deformation of the contact surface, directly causing equipment downtime and affecting production efficiency.

[0004] To alleviate the aforementioned friction and wear problems, existing technologies typically employ the method of periodically adding lubricating oil, which forms an oil film on the contact surface to reduce the coefficient of friction. However, the use of lubricating oil brings new technical challenges: during the knitting process, lubricating oil can easily splash onto the fabric surface due to the high-speed movement of the knitting needles, causing oil stains on the fabric. This not only increases the cost of subsequent cleaning processes but may also affect the quality and appearance of the fabric due to incomplete cleaning. At the same time, after long-term use, lubricating oil will attract dust, metal shavings, and other impurities, forming sludge, which will actually accelerate component wear and further shorten the service life of the knitting blocks and needles.

[0005] On the other hand, in existing double-sided circular knitting machines, the triangular blocks are mostly fixed to the triangular base with bolts or other fasteners, and their position and angle cannot be adjusted once determined. When the curved slide of the triangular block wears down, the wear cannot be compensated for by fine-tuning, and the entire triangular block must be replaced. As a precision component, the triangular block has a complex manufacturing process and high manufacturing cost. Frequent replacements not only increase equipment maintenance costs but also require downtime for disassembly and installation, extending equipment downtime and seriously affecting production continuity. Furthermore, different fabric types have different requirements for needle movement trajectories, and the fixed triangular blocks are difficult to adapt to diverse knitting needs, limiting the applicability and flexibility of the equipment. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a cam device for a double-sided circular knitting machine, which solves the problems of lubricant contamination and wear in existing circular knitting machine cams. This cam device for a double-sided circular knitting machine can avoid the use of lubricant and also facilitates the reduction of replacement costs.

[0007] This utility model discloses a triangular device for a double-sided circular knitting machine, including a triangular body. The triangular body is provided with a curved slide for the needle heel of the knitting machine to slide. A detachable groove-shaped component is embedded in the inner wall of the curved slide. The groove-shaped component is made of polytetrafluoroethylene. The groove-shaped component is arranged along the extension direction of the curved slide, and the length of the groove-shaped component is consistent with the effective sliding length of the curved slide. The inner wall of the groove-shaped component is adapted to the sliding path of the curved slide, and the outer periphery of the groove-shaped component fits the inner wall contour of the curved slide.

[0008] Furthermore, the depth of the curved slide is equal to the thickness of the groove, so that after the groove is inserted, its opening is flush with the surface of the triangular body.

[0009] Furthermore, positioning protrusions are provided at both ends of the groove-shaped component, and positioning grooves are provided at both ends of the curved slide, with the positioning protrusions engaging with the positioning grooves.

[0010] Furthermore, the triangular body is a metal component.

[0011] The cam mechanism of this double-sided circular knitting machine utilizes a PTFE (polytetrafluoroethylene) groove embedded in the inner wall of a curved track. Leveraging PTFE's extremely low coefficient of friction (far lower than that between metals), it significantly reduces sliding friction between the needle heel and the track's inner wall. This design fundamentally alleviates wear on the contact surfaces, maintaining the contour accuracy of the curved track over the long term, ensuring the needle's movement follows a preset path, and preventing quality defects such as uneven fabric loops and misaligned weaves. It also reduces metal debris generation, lowers the risk of needle jamming, improves equipment stability, and extends the lifespan of both the cam body and the needles. Because PTFE has excellent self-lubricating properties, low-friction operation is achieved without additional lubricant. This completely solves the problem of fabric contamination caused by lubricant splashing, eliminating the need for subsequent cleaning processes and ensuring fabric quality and appearance. Furthermore, it prevents sludge formation, further reducing component wear and lowering equipment maintenance costs and frequency. When the grooved part wears out due to long-term use, it is not necessary to replace the entire triangular body. Only the grooved part needs to be disassembled and replaced, which greatly reduces replacement costs and maintenance difficulty, reduces equipment downtime, and ensures production continuity. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the triangular device of a double-sided circular knitting machine. Detailed Implementation

[0014] This utility model discloses a triangular device for a double-sided circular knitting machine. This triangular device can avoid the use of lubricating oil and also facilitates the reduction of replacement costs.

[0015] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0016] See Figure 1As shown, this utility model discloses a triangular device for a double-sided circular knitting machine, including a triangular body 3. The triangular body 3 is provided with a curved slide 5 for the needle heel of the knitting machine to slide. A detachable groove 1 is embedded in the inner wall of the curved slide 5. The groove 1 is made of polytetrafluoroethylene. The groove 1 is arranged along the extension direction of the curved slide 5, and the length of the groove 1 is consistent with the effective sliding length of the curved slide 5. The inner wall of the groove 1 is adapted to the sliding path of the curved slide 5, and the outer periphery of the groove 1 fits the inner wall contour of the curved slide 5.

[0017] The cam mechanism of this double-sided circular knitting machine utilizes a PTFE (polytetrafluoroethylene) groove 1 embedded in the inner wall of the curved slide 5. Leveraging PTFE's extremely low coefficient of friction (far lower than that between metals), it significantly reduces sliding friction between the needle heel and the slide's inner wall. This design fundamentally alleviates wear on the contact surfaces, maintaining the contour accuracy of the curved slide 5 over the long term, ensuring the needle's movement trajectory conforms to the preset path, and preventing quality defects such as uneven fabric loops and misaligned weaves. It also reduces metal debris generation, lowers the risk of needle jamming, improves equipment operational stability, and extends the service life of the cam body 3 and the needles. Because PTFE itself has excellent self-lubricating properties, low-friction operation can be achieved without additional lubricating oil. This not only completely solves the problem of fabric oil contamination caused by lubricating oil splashes, eliminating the need for subsequent cleaning processes and ensuring fabric quality and appearance, but also prevents sludge formation, further reducing component wear and lowering equipment maintenance costs and frequency. When the grooved part 1 wears out due to long-term use, it is not necessary to replace the entire triangular body 3. Only the grooved part 1 needs to be disassembled and replaced, which greatly reduces the replacement cost and maintenance difficulty, reduces equipment downtime, and ensures production continuity.

[0018] The depth of the curved slide 5 is equal to the thickness of the groove 1, so that after the groove 1 is embedded, its opening is flush with the surface of the triangular body 3. This ensures that the knitting needle is subjected to uniform force during the sliding process without additional obstruction, ensuring the smoothness of the knitting needle's lifting, translating and other actions, further reducing the risk of knitting needle jamming and improving the stability of equipment operation.

[0019] The two ends of the groove 1 are respectively provided with positioning protrusions 4, and the two ends of the curved slide 5 are respectively provided with positioning grooves 2. The positioning protrusions 4 and the positioning grooves 2 are engaged and matched.

[0020] The snap-fit ​​between the positioning protrusion 4 and the positioning groove 2 can quickly and accurately determine the installation position of the groove 1 in the curved slide 5, avoiding the displacement or misalignment of the groove 1 during installation, ensuring that the inner wall of the groove 1 is fully adapted to the preset sliding path of the knitting needle, thereby ensuring the accuracy of the knitting needle movement trajectory and avoiding fabric quality problems caused by the installation deviation of the groove 1.

[0021] The triangular body 3 is a metal part.

[0022] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A triangular device for a double-sided circular knitting machine, characterized in that, The device includes a triangular body with a curved slide for the needle heel of a knitting machine to slide on. A detachable groove is embedded in the inner wall of the curved slide. The groove is made of polytetrafluoroethylene (PTFE). The groove is arranged along the extension direction of the curved slide, and the length of the groove is consistent with the effective sliding length of the curved slide. The inner wall of the groove is adapted to the sliding path of the curved slide, and the outer periphery of the groove fits the inner wall contour of the curved slide.

2. The triangular device of the double-sided circular knitting machine according to claim 1, characterized in that, The depth of the curved slide is equal to the thickness of the groove, so that after the groove is inserted, its opening is flush with the surface of the triangular body.

3. The triangular device of the double-sided circular knitting machine according to claim 1, characterized in that, The grooved component has positioning protrusions at both ends, and the curved slide has positioning grooves at both ends. The positioning protrusions and positioning grooves engage with each other.

4. The triangular device of the double-sided circular knitting machine according to claim 1, characterized in that, The triangular body is a metal component.

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