An adjustable warp feeding mechanism for a warp knitting machine

Abstract

This utility model discloses an adjustable warp feeding mechanism for a warp knitting machine, relating to the field of warp knitting machine technology. It includes a frame on which a warp feeding assembly is mounted. The warp feeding assembly includes a first roller and a second roller. Adjustment components are respectively mounted at both ends of the first and second rollers. This adjustable warp feeding mechanism achieves dynamic adaptive adjustment of the first roller's position by sliding an adjustment block back and forth within an adjustment mounting groove, combined with the elastic contact between an adjustment spring and an adjustment locking block. This allows for real-time response to changes in warp tension (such as the take-up and take-up requirements of the loop-forming mechanism) during high-speed operation of the warp knitting machine, effectively stabilizing tension, reducing yarn vibration and breakage, preventing yarn tangling, improving knitting quality and production efficiency, and enhancing the mechanism's adaptability to high-speed warp feeding.

Description

Technical Field

[0001] This utility model relates to the field of warp knitting machine technology, specifically to an adjustable warp feeding mechanism for a warp knitting machine. Background Technology

[0002] As described in the published patent CN206616333U, "A Warp Feeding Mechanism for a Warp Knitting Machine," warp knitting machines are commonly used mechanical equipment in the textile industry. The principle of a warp knitting machine is to drive a loop-forming mechanism to knit the warp yarns fed by the warp feeding mechanism, and finally, to wind up the knitted fabric through a coiling mechanism. Throughout the knitting process, the warp feeding effect of the warp feeding mechanism significantly affects the knitting effect of the loop-forming mechanism. Furthermore, because the loop-forming mechanism involves both releasing and winding the warp yarns during operation—when the groove needle pulls the warp yarns down, the warp yarns need to be released (lower tension), and when the groove needles are pulled down to their lowest position, the warp yarns need to be wound (higher tension)—it is difficult for the warp feeding mechanism to adjust in real time, resulting in uneven warp yarn tension. Therefore, improvements to the warp feeding mechanism of the warp knitting machine are necessary.

[0003] As described in the published patent CN206706321U, a warp knitting machine is a textile machinery device that produces warp-knitted fabrics by unwinding one or more sets of parallel yarns from a coil onto the working needles of a stable warp-feeding machine to form loops. Warp knitting machines are highly adaptable to a wide range of raw materials and fabric types, and have high machine productivity.

[0004] The warp knitting machine mainly consists of a knitting mechanism, a guide bar traverse mechanism, a warp feeding mechanism, a pull-and-take mechanism, and a transmission mechanism. The warp yarns are fed in by the warp feeding mechanism and woven into fabric through the coordinated movement of various components in the knitting mechanism. At the same time, the guide bar traverse mechanism knits the fabric into a knitted fabric with a certain structure. Finally, the pull-and-take mechanism pulls the completed knitted fabric forward and winds it into a whole roll.

[0005] The warp feeding mechanism is a crucial component of a warp knitting machine, available in passive and active structures, and directly impacts the quality and pattern variety of the warp-knitted products. Abnormal control of the warp feed rate by the mechanism can cause yarn vibration or even breakage, affecting the machine's production efficiency and fabric quality. Furthermore, unstable yarn tension during the input process can lead to yarn tangling, further damaging the fabric's quality.

[0006] In most existing warp knitting machines, the active warp feeding mechanism uses a tension bar to feed the yarn into the knitting mechanism. However, when the tension is high, the yarn vibrates significantly and is prone to breakage. The tension is difficult to adjust, and the purpose of warp feeding cannot be effectively achieved.

[0007] In summary, in the existing technology, the warp feeding mechanism of some warp knitting machines has insufficient tension adjustment, resulting in uneven tension of the warp threads and affecting the production quality of the warp knitting machine. Utility Model Content

[0008] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An adjustable warp feeding mechanism for a warp knitting machine includes a frame, on which a warp feeding assembly is mounted. The warp feeding assembly includes a first roller and a second roller, and adjustment components are respectively mounted at both ends of the first roller and the second roller.

[0011] The adjustment assembly includes an adjustment mounting plate fixedly mounted on the frame, and the second roller is rotatably mounted on the adjustment mounting plate;

[0012] The adjustment mounting plate has an adjustment mounting groove, and a sliding adjustment block for front and rear sliding adjustment is slidably installed in the adjustment mounting groove. The first roller is rotatably mounted on the sliding adjustment block. Adjustment blocks are respectively installed at the front and rear ends of the sliding adjustment block. Spring plate mounting seats are respectively installed at the front and rear ends of the inner side of the adjustment mounting plate. Adjustment spring plates that elastically abut against the adjustment blocks are installed on the spring plate mounting seats.

[0013] As a further embodiment of this utility model: the spring plate mounting base includes a first mounting block fixedly disposed on the inner side of the adjustment mounting plate, a second mounting block being locked and mounted on the first mounting block, a first mounting groove being provided on the first mounting block, and a second mounting groove being provided on the second mounting block that aligns and cooperates with the first mounting groove. The first mounting groove and the second mounting groove cooperate to form a fixed mounting groove, and the end of the adjustment spring plate is fixedly mounted in the fixed mounting groove.

[0014] As a further embodiment of this utility model: the adjusting spring is V-shaped, the end of the adjusting block is provided with a V-shaped locking groove, the open end of the V-shaped adjusting spring is fixed in the fixed mounting groove, and the other end of the V-shaped adjusting spring is elastically engaged in the locking groove.

[0015] As a further embodiment of this utility model: the V-shaped adjusting spring includes a first curved section that abuts against the locking groove, the first curved section is sequentially connected to a second curved section and a third curved section, and the curvature of the first, second and third curved sections increases sequentially.

[0016] As a further embodiment of this utility model: the front end of the adjustment mounting groove is open, and the front end of the adjustment mounting plate is detachably fixedly mounted with a limiting mounting block on the opening. A guide shaft extending into the adjustment mounting groove is fixedly mounted on the limiting mounting block. A guide hole penetrating from front to back is opened on the adjustment mounting plate, and the adjustment mounting plate slides and adjusts on the guide shaft through the guide hole.

[0017] As a further embodiment of this utility model: the rear end of the adjustment mounting groove is provided with a positioning mounting hole, and the end of the guide shaft is inserted into the positioning mounting hole for positioning and engagement.

[0018] As a further embodiment of this utility model: the adjusting block has a mounting hole that fits onto the guide shaft, and the adjusting block is fixedly mounted on the end face of the adjusting mounting plate.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model's adjustable warp feeding mechanism achieves dynamic adaptive adjustment of the first roller position by sliding the adjusting block back and forth in the adjusting mounting groove, combined with the elastic contact between the adjusting spring and the adjusting block. This allows it to respond in real time to changes in warp tension (such as the take-up and take-up requirements of the looping mechanism) when the warp knitting machine is running at high speed, effectively stabilizing tension, reducing yarn vibration and breakage, avoiding yarn tangling, improving knitting quality and production efficiency, and enhancing the mechanism's adaptability to high-speed warp feeding. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a warp knitting machine in the existing technology;

[0022] Figure 2 This is a three-dimensional structural view of the warp feeding component in this utility model;

[0023] Figure 3 yes Figure 2 A partial view at point A in the middle;

[0024] Figure 4 This is another three-dimensional view of the warp feeding component in this utility model;

[0025] Figure 5 yes Figure 4 A partial view at point B in the middle;

[0026] Figure 6 This is a three-dimensional structural view of the adjustment component in this utility model;

[0027] Figure 7 This is a three-dimensional view of the adjusting spring in this utility model;

[0028] The reference numerals and names in the figure are as follows:

[0029] Frame-101, warp feeding assembly-102, first roller-103, second roller-104, adjusting assembly-105, adjusting mounting plate-106, adjusting mounting groove-107, sliding adjusting block-108, adjusting locking block-109, spring plate mounting seat-110, adjusting spring plate-111, first mounting block-112, second mounting block-113, first mounting groove-114, second mounting groove-115, fixed mounting groove-116, snap-fit ​​groove-117, first bending section-118, second bending section-119, third bending section-120, limiting mounting block-121, guide shaft-122, positioning mounting hole-124, locking block mounting hole-125. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-7 An adjustable warp feeding mechanism for a warp knitting machine includes a frame 101, on which a warp feeding assembly 102 is mounted. The warp feeding assembly 102 includes a first roller 103 and a second roller 104, and adjustment assemblies 105 are respectively mounted at both ends of the first roller 103 and the second roller 104.

[0032] The adjustment assembly 105 includes an adjustment mounting plate 106 fixedly mounted on the frame 101, and the second roller 104 is rotatably mounted on the adjustment mounting plate 106;

[0033] The adjustment mounting plate 106 is provided with an adjustment mounting groove 107. A sliding adjustment block 108 for front-to-back sliding adjustment is slidably installed in the adjustment mounting groove 107. The first roller 103 is rotatably mounted on the sliding adjustment block 108. Adjustment blocks 109 are respectively installed at the front and rear ends of the sliding adjustment block 108. Spring plate mounting seats 110 are respectively installed at the front and rear ends of the inner side of the adjustment mounting plate 106. Adjustment spring plates 111 that elastically abut against the adjustment blocks 109 are installed on the spring plate mounting seats 110.

[0034] This utility model's adjustable warp feeding mechanism significantly improves the warp feeding stability and weaving quality of warp knitting machines during high-speed operation. By allowing the sliding adjustment block 108 to slide freely back and forth within the adjustment mounting groove 107, combined with the elastic contact between the adjustment spring 111 and the adjustment block 109, the mechanism can instantly sense and respond to the instantaneous warp tension changes caused by the actions of the loop forming mechanism (such as the tension release when the groove needle is pulled down and the tension tightening at the lowest point). This mechanical elastic feedback mechanism has a fast response speed, far exceeding that of traditional rigid or slow-adjusting mechanisms.

[0035] When the warp tension increases, the tension acts on the first roller 103, pushing the sliding adjusting block 108 to slide backward a small distance against the elastic force of the adjusting spring 111, which is equivalent to slightly tightening the warp path and increasing the tension to meet the requirements; conversely, when the tension decreases (such as when the warp needs to be released during the pull-down process of the groove needle), the elastic force of the adjusting spring 111 will push the sliding adjusting block 108 forward a small distance, which is equivalent to slightly loosening the warp path and releasing the tension.

[0036] The aforementioned real-time, minute path length adjustment effectively smooths out the inherent drastic tension fluctuations (high and low tension switching) in the weaving cycle, maintaining the warp tension within a more uniform and stable ideal range, and solving the problem of uneven tension caused by the difficulty in real-time adjustment of the warp feeding mechanism in the existing technology.

[0037] Stable tension is the foundation of high-speed operation. Tension uniformity greatly reduces the violent shaking of warp threads during high-speed transport, significantly reducing the risk of thread breakage caused by excessively high or fluctuating tension peaks, thus ensuring production continuity and efficiency. Low or unstable tension is the main cause of yarn tangling and knotting. This mechanism effectively avoids the possibility of yarn slack, drift, and tangling by maintaining a stable lower tension limit, thereby reducing fabric defects (such as horizontal stripes and holes) caused by yarn tangling and significantly improving the quality and consistency of the final woven fabric.

[0038] This adjustment mechanism does not rely on a complex external control system. Its purely mechanical structure is simple and reliable, and it can effectively adapt to the harsh environment of high-speed operation of warp knitting machines. At the same time, stable warp feeding provides a more reliable yarn foundation for weaving complex patterns, and improves the machine's adaptability to raw materials and fabric varieties.

[0039] This utility model's adjustable warp feeding mechanism achieves dynamic adaptive adjustment of the position of the first roller 103 by sliding the sliding adjustment block 108 back and forth in the adjustment mounting groove 107, combined with the elastic abutment of the adjustment spring 111 and the adjustment block 109. This allows it to respond in real time to changes in warp tension (such as the take-up and take-out requirements of the looping mechanism) when the warp knitting machine is running at high speed, effectively stabilizing tension, reducing yarn vibration and breakage, avoiding yarn tangling, improving knitting quality and production efficiency, and enhancing the mechanism's adaptability to high-speed warp feeding.

[0040] In this embodiment of the utility model, the spring plate mounting base 110 includes a first mounting block 112 fixedly disposed on the inner side of the adjusting mounting plate 106, a second mounting block 113 locked onto the first mounting block 112, a first mounting groove 114 formed on the first mounting block 112, and a second mounting groove 115 formed on the second mounting block 113 that aligns with and cooperates with the first mounting groove 114. The first mounting groove 114 and the second mounting groove 115 cooperate to form a fixed mounting groove 116, and the end of the adjusting spring plate 111 is fixedly mounted in the fixed mounting groove 116.

[0041] The split spring plate mounting base 110 structure (the first mounting block 112 and the locked second mounting block 113 cooperate to form a fixed mounting groove 116) significantly improves the installation stability and maintenance convenience of the adjustment spring plate 111.

[0042] The first mounting block 112 is fixedly connected to the frame 101 to provide basic support. The second mounting block 113 is tightly connected to the first mounting block 112 by locking, so that the fixed mounting groove 116 formed by the two together forms a rigid constraint, which completely avoids the end of the adjusting spring 111 from dislodging or loosening under high-speed vibration, and ensures the long-term reliability of elastic contact.

[0043] The precise alignment design of the first mounting groove 114 and the second mounting groove 115 ensures that the end of the adjusting spring 111 is subjected to uniform force, and the split structure disperses the concentrated stress when the spring is working, reducing the risk of fatigue cracking of the mounting seat.

[0044] When it is necessary to replace or adjust the adjusting spring 111, the end of the spring can be exposed by simply removing the locking connection of the second mounting block 113, without having to disassemble the entire adjusting assembly 105 or the frame 101, which greatly shortens the downtime for maintenance.

[0045] The split structure allows the first mounting block 112 to be welded and fixed to the frame 101 (to ensure strength), while the second mounting block 113 is a detachable machined part (to ensure the accuracy of the mounting groove), taking into account both manufacturing efficiency and critical dimension control.

[0046] In this embodiment of the utility model, the adjusting spring 111 is arranged in a V-shape, the end of the adjusting block 109 is provided with a V-shaped locking groove 117, the open end of the V-shaped adjusting spring 111 is fixed in the fixed mounting groove 116, and the other end of the V-shaped adjusting spring 111 is elastically engaged in the locking groove 117.

[0047] The V-shaped spring sheet abuts against the double inclined surfaces in the locking groove 117 to form a symmetrical elastic constraint force, so that the sliding adjustment block 108 is always subjected to uniform radial pressure when sliding back and forth, effectively preventing lateral displacement or jamming during the adjustment process.

[0048] The elastic deformation of the two arms of the V-shaped spring can respond synchronously to changes in tension, converting small sliding displacements into larger changes in elastic potential energy, significantly improving the sensitivity and feedback speed to instantaneous tension fluctuations.

[0049] The surface contact mode between the V-groove and the tip of the spring (compared to point / line contact) disperses local stress, avoids stress concentration leading to plastic deformation of the spring or wear of the jamming block, and extends the life of key components.

[0050] The mechanical interlocking structure of the V-shaped tip of the spring clip embedded in the locking groove 117 can maintain a tight contact even under high-speed vibration, eliminating the risk of elastic failure or disengagement caused by vibration.

[0051] In this embodiment of the present invention, the V-shaped adjusting spring 111 includes a first curved section 118 that abuts against the snap-fit ​​groove 117. The first curved section 118 is sequentially connected to a second curved section 119 and a third curved section 120, and the curvature of the first, second and third curved sections 120 increases sequentially.

[0052] The first bending section 118 with a small curvature provides initial elastic support to ensure stable contact with the locking groove 117; the second bending section 119 with a medium curvature serves as the core elastic deformation zone, realizing linear feedback of tension increase and decrease; the third bending section 120 with a large curvature provides high flexibility and buffering capacity, absorbing impact through large deformation during extreme tension changes, and avoiding plastic damage to the spring sheet.

[0053] The increasing curvature structure allows the stress gradient to transition naturally during the deformation of the spring, significantly reducing the stress concentration phenomenon that is prone to occur at the root of traditional constant curvature springs and delaying the generation of metal fatigue cracks.

[0054] When encountering abnormally high tension (such as yarn entanglement), the large deformation of the third bending section 120 forms a mechanical safety device, which first consumes the impact energy and protects the front structure and the adjusting block 109 from damage.

[0055] By integrating multiple functions such as elastic support, precise feedback and overload protection within a limited space through a tiered curvature layout, the adjustment spring 111 possesses high sensitivity, wide adaptability and long service life, providing core assurance for the continuous and stable operation of high-speed warp knitting machines.

[0056] In this embodiment of the utility model, the front end of the adjustment mounting groove 107 is open, and the front end of the adjustment mounting plate 106 is detachably fixedly mounted with a limiting mounting block 121 on the opening. A guide shaft 122 extending into the adjustment mounting groove 107 is fixedly mounted on the limiting mounting block 121. A guide hole extending through the front and rear is opened on the adjustment mounting plate 106, and the adjustment mounting plate 106 slides and adjusts on the guide shaft 122 through the guide hole.

[0057] By disassembling the original limit mounting block 121 and replacing it with a new module containing a guide shaft 122 of a specific specification, the stroke range and guiding accuracy of the sliding adjustment block 108 can be adjusted immediately without replacing the entire frame 101 or the adjustment component 105, thus efficiently matching different yarn tension thresholds or weaving speed requirements.

[0058] The guide shaft 122 passes through the guide hole of the adjusting mounting plate 106 to form a rigid sliding pair, ensuring that the sliding adjusting block 108 does not wobble or deviate during high-speed reciprocating motion and maintains long-term positioning accuracy;

[0059] The limit mounting block 121 integrates the guide shaft 122 and the adjusting block 109. When replacing, the easily damaged snap-fit ​​structure is updated simultaneously to avoid elastic failure caused by the fit tolerance of the new and old parts and to ensure the stability of the V-shaped spring contact.

[0060] Replacing a partial module saves downtime compared to disassembling and assembling the entire mechanism, and the guide shaft 122 can be made of wear-resistant alloy material, which reduces costs compared to replacing the entire adjustment mounting plate 106.

[0061] When abnormal impacts cause deformation of the guide shaft 122, the detachable design allows for quick replacement of the damaged module.

[0062] In this embodiment of the present invention, the rear end of the adjusting mounting groove 107 is provided with a positioning mounting hole 124, and the end of the guide shaft 122 is inserted into the positioning mounting hole 124 for positioning and engagement.

[0063] The end of the guide shaft 122 is inserted into the positioning mounting hole 124 to form an axial hard limit, which forms an orthogonal constraint system with the guide hole, completely eliminating the risk of axial movement and radial wobble of the sliding adjustment block 108 in high-speed reciprocating, and ensuring that the V-shaped spring sheet always has a vertical contact posture.

[0064] The insert structure provides mechanical interlock redundancy, preventing displacement of the guide shaft 122 and eliminating progressive failure under high-speed vibration.

[0065] In this embodiment of the utility model, the adjusting block 109 is provided with a block mounting hole 125 that is sleeved on the guide shaft 122, and the adjusting block 109 is fixedly mounted on the end face of the adjusting mounting plate 106.

[0066] The mounting hole 125 of the card block and the guide shaft 122 are precisely sleeved to form a coaxial constraint, which completely eliminates the radial micro-displacement of the adjusting card block 109 under high-speed vibration, ensuring that the V-shaped spring is always accurately embedded in the center of the card slot 117, and avoiding elastic failure caused by the offset of the adjusting card block 109.

[0067] The adjusting block 109 is fixed to the end face of the adjusting mounting plate 106 to bear the axial force, while the guide shaft 122 only bears the radial guiding function. The dual-path load decomposition design reduces the wear rate of the guide shaft 122.

[0068] The sleeve structure enables the sliding adjustment block 108, the adjustment block 109 and the guide shaft 122 to form a rigid motion unit. Under the constraint of the positioning mounting hole 124, the overall displacement repeatability positioning accuracy is high, ensuring the linear consistency of tension feedback.

[0069] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An adjustable warp feeding mechanism for a warp knitting machine, characterized in that, The machine includes a frame (101), on which a warp feeding assembly (102) is mounted. The warp feeding assembly (102) includes a first roller (103) and a second roller (104). Adjustment assemblies (105) are respectively mounted at both ends of the first roller (103) and the second roller (104). The adjustment assembly (105) includes an adjustment mounting plate (106) fixedly mounted on the frame (101), and the second roller (104) is rotatably mounted on the adjustment mounting plate (106); The adjustment mounting plate (106) is provided with an adjustment mounting groove (107). A sliding adjustment block (108) for front and rear sliding adjustment is slidably installed in the adjustment mounting groove (107). The first roller (103) is rotatably mounted on the sliding adjustment block (108). Adjustment blocks (109) are respectively installed at the front and rear ends of the sliding adjustment block (108). Spring plate mounting seats (110) are respectively installed at the front and rear ends of the inner side of the adjustment mounting plate (106). Adjustment spring plates (111) that elastically abut against the adjustment blocks (109) are installed on the spring plate mounting seats (110).

2. The adjustable warp feeding mechanism of a warp knitting machine according to claim 1, characterized in that, The spring plate mounting base (110) includes a first mounting block (112) fixedly disposed on the inner side of the adjusting mounting plate (106), a second mounting block (113) being locked onto the first mounting block (112), a first mounting groove (114) being provided on the first mounting block (112), and a second mounting groove (115) being provided on the second mounting block (113) to align with the first mounting groove (114). The first mounting groove (114) and the second mounting groove (115) cooperate to form a fixed mounting groove (116), and the end of the adjusting spring plate (111) is fixedly installed in the fixed mounting groove (116).

3. An adjustable warp feeding mechanism for a warp knitting machine according to any one of claims 1-2, characterized in that, The adjusting spring (111) is V-shaped, and the end of the adjusting block (109) is provided with a V-shaped locking groove (117). The open end of the V-shaped adjusting spring (111) is fixed in the fixed mounting groove (116), and the other end of the V-shaped adjusting spring (111) is elastically engaged in the locking groove (117).

4. The adjustable warp feeding mechanism of a warp knitting machine according to claim 3, characterized in that, The V-shaped adjusting spring (111) includes a first curved section (118) that abuts against the snap-fit ​​groove (117). The first curved section (118) is connected in sequence to a second curved section (119) and a third curved section (120). The curvature of the first, second and third curved sections (120) increases in sequence.

5. The adjustable warp feeding mechanism of a warp knitting machine according to claim 4, characterized in that, The front end of the adjustment mounting groove (107) is open. The front end of the adjustment mounting plate (106) is detachably fixed with a limiting mounting block (121) on the opening. A guide shaft (122) extending into the adjustment mounting groove (107) is fixedly installed on the limiting mounting block (121). A guide hole that runs through the front and rear of the adjustment mounting plate (106) is opened. The adjustment mounting plate (106) slides and adjusts on the guide shaft (122) through the guide hole.

6. The adjustable warp feeding mechanism of a warp knitting machine according to claim 5, characterized in that, The rear end of the adjustment mounting groove (107) is provided with a positioning mounting hole (124), and the end of the guide shaft (122) is inserted into the positioning mounting hole (124) for positioning and engagement.

7. An adjustable warp feeding mechanism for a warp knitting machine according to any one of claims 1-5, characterized in that, The adjusting block (109) has a mounting hole (125) that is sleeved on the guide shaft (122), and the adjusting block (109) is fixedly mounted on the end face of the adjusting mounting plate (106).

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