Tension control system for a circular knitting machine
By using auxiliary motor components and pressure sensors on a circular knitting machine, yarn tension can be detected and adjusted in real time, solving the problem of unstable yarn tension control and improving yarn stability and textile quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUANZHOU WELLRICH KNITTING MASCH CO LTD
- Filing Date
- 2025-08-25
- Publication Date
- 2026-06-30
AI Technical Summary
The existing yarn tension control mechanism of circular knitting machines has poor stability when the equipment is running at high speed, which can easily lead to frequent yarn jumping, increase the risk of yarn breakage, and reduce textile quality.
The system employs a combination of components such as an auxiliary motor assembly, a fastening wheel, a main gear ring, a guide wheel, and a pressure sensor. The main motor and PLC assembly detect yarn tension in real time, adjusting the yarn's movement speed and tension to ensure the yarn remains within a stable range.
It improves the stability of yarn tension, reduces the probability of yarn breakage, and ensures the improvement of textile quality.
Smart Images
Figure CN224430882U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tension control technology, specifically to a tension control system for a circular knitting machine. Background Technology
[0002] A circular knitting machine consists of a frame, a yarn feeding mechanism, a transmission mechanism, a lubrication and dust removal (cleaning) mechanism, an electrical control mechanism, a traction and take-up mechanism, and other auxiliary devices. The yarn feeding mechanism must ensure that the yarn tension is reasonable, thereby reducing the occurrence of defects such as missed needles on the fabric surface, reducing weaving defects, and ensuring the quality of the woven fabric.
[0003] A search revealed a prior art disclosure regarding a yarn conveying tension adjustment mechanism for a circular knitting machine (publication number: CN110713077B). The document describes that "the guide wheel assembly includes a mounting frame and guide wheels rotatably connected to the mounting frame; the pressure wheel assembly includes a main mounting base with a vertical movable groove, a secondary mounting base inserted into the vertical movable groove and capable of vertical movement under its own weight, and pressure wheels rotatably connected to the secondary mounting base; a jog button is installed in the vertical movable groove, and the jog button is located below the secondary mounting base; a yarn clamp is provided on one side of the guide wheel assembly for yarn feeding, and the jog button..." The tension adjustment mechanism controls the yarn clamp. This mechanism uses a mounting plate with two guide wheel sets, a pressure wheel set, a main mounting base, and a secondary mounting base. The secondary mounting base, by pressing a button during its descent, activates the yarn clamp to control yarn tension. However, during rapid operation, the yarn tension within the mechanism fluctuates, and the secondary mounting base, falling under its own weight, causes the yarn to tend towards a taut state, leading to the yarn causing the counterweight to jump. If the frequency is too high, it reduces the stability of the device's yarn tension control and may even increase the probability of yarn breakage, thus reducing the quality of subsequent weaving. Utility Model Content
[0004] To overcome the shortcomings of the existing technology, a tension control system for a circular knitting machine is provided to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, a tension control system for a circular knitting machine is provided, comprising: a base, on which a left fixed frame, a middle fixed frame, and a right fixed frame are fixedly connected to the upper surface of the base respectively. Guide wheels are movably connected to the left and right fixed frames via bearings. An auxiliary motor assembly is fixedly connected to the upper outer surface of the right fixed frame via a carrier plate. The auxiliary motor assembly is connected to a fastening wheel via a coupling. The fastening wheel is movably connected to the upper end of the inner cavity of the right fixed frame via a bearing. The fastening wheel and guide wheel in the right fixed frame mesh with a main gear ring. Simultaneously, a sleeve is movably connected to the upper surface of the middle fixed frame via a bearing. An auxiliary gear ring is fixedly connected to the upper surface of the sleeve. A main motor is fixedly connected to the upper surface of the middle fixed frame. The output shaft of the main motor meshes with the auxiliary gear ring via a drive wheel. A main lead screw is screwed into the sleeve. A moving plate is fixedly connected to the lower end of the main lead screw. A fixed plate is fixedly connected to the lower surface of the moving plate via a pressure sensor. A detection wheel is movably connected to the lower surface of the fixed plate via a bearing.
[0006] Preferably, the right fixed frame, middle fixed frame and left fixed frame fixedly connected to the upper surface of the base are all U-shaped structures, and the two sets of guide wheels movably connected inside the left fixed frame and the right fixed frame are at the same horizontal height. At the same time, the base, left fixed frame, middle fixed frame and right fixed frame are combined together to form an E-shaped structure.
[0007] Preferably, the sleeve movably connected to the middle fixed frame has a cylindrical structure, the axial section of the sleeve has an I-shaped structure, and the movable plate slidably connected to the inner cavity of the middle fixed frame has a rectangular structure, and the dimensions of the movable plate and the inner cavity of the middle fixed frame are compatible.
[0008] Preferably, the main sliders are symmetrically connected to both sides of the movable plate. The main sliders have a square structure, and the main slide groove is opened on the inner side of the middle fixed frame relative to the position of the main slider. The length of the main slide groove is less than the height of the inner side of the middle fixed frame. At the same time, the movable plate and the main lead screw are combined to form a T-shaped structure.
[0009] Preferably, the fixing plate has a square structure, and the size of the fixing plate is smaller than the size of the inner cavity of the middle fixing frame. Two sets of guide rods are symmetrically connected to both ends of the upper surface of the fixing plate. Both sets of guide rods have a cylindrical structure, and guide holes are opened on the surface of the moving plate relative to the position of the guide rods. At the same time, the sizes of the guide rods and the guide holes are compatible.
[0010] Preferably, the fastening wheel has a cylindrical structure, and a fastening layer is fixedly connected to the surface of the fastening wheel relative to the groove of the guide wheel. The fastening layer has an annular structure, and the size of the fastening layer and the groove of the guide wheel are matched. At the same time, a set of main gear rings are fixedly connected to the same end of the fastening wheel and the guide wheel, and the two sets of main gear rings mesh with each other.
[0011] Preferably, the loading plate fixedly connected to the outer side of the right fixed frame has a rectangular structure and an F-shaped cross-section. The auxiliary motor assembly fixedly connected to the upper surface of the loading plate consists of an auxiliary motor and a reducer, and the auxiliary motor is connected to the fastening wheel through the reducer.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: through the cooperation of the auxiliary motor assembly, fastening wheel, fastening layer, main gear ring, guide wheel and right fixed frame, the device can flexibly adjust the yarn movement speed, thereby assisting in the control of yarn tension. At the same time, through the cooperation of the main motor, sleeve, auxiliary gear ring, main screw, moving plate, pressure sensor, fixed plate and detection wheel, the yarn tension change can be detected in real time, and the yarn tension can be easily adjusted to ensure that the yarn tension is within a stable and appropriate range, thereby enhancing the overall stability of the yarn tension and helping to reduce the probability of accidental yarn breakage, ensuring the quality of subsequent textile production. Attached Figure Description
[0013] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model.
[0014] Figure 2 This is a side view of an embodiment of the present utility model.
[0015] Figure 3 This is a top view of an embodiment of the present utility model.
[0016] Figure 4 This is a front view of the right fixing bracket portion of an embodiment of the present utility model.
[0017] In the diagram: 1. Base; 2. Left fixed frame; 3. Guide rod; 4. Pressure sensor; 5. Middle fixed frame; 6. Detection wheel; 7. Fixed plate; 8. Right fixed frame; 9. Guide wheel; 10. Moving plate; 11. Sleeve; 12. Main lead screw; 13. Main motor; 14. Fastening layer; 15. Fastening wheel; 16. Main slider; 17. Main gear ring; 18. Auxiliary motor assembly. Detailed Implementation
[0018] Reference Figures 1 to 4As shown, this utility model provides a tension control system for a circular knitting machine, including: a base 1, on which a left fixed frame 2, a middle fixed frame 5, and a right fixed frame 8 are fixedly connected to the upper surface of the base 1 respectively. Guide wheels 9 are movably connected to the left fixed frame 2 and the right fixed frame 8 via bearings. An auxiliary motor assembly 18 is fixedly connected to the upper end of the outer surface of the right fixed frame 8 via a carrying plate. The auxiliary motor assembly 18 is connected to a fastening wheel 15 via a coupling. The fastening wheel 15 is movably connected to the upper end of the inner cavity of the right fixed frame 8 via bearings. The fixed wheel 15 and the guide wheel 9 are engaged by the main gear ring 17. At the same time, the upper surface of the middle fixed frame 5 is movably connected to the sleeve 11 through the bearing. The upper surface of the sleeve 11 is fixedly connected to the auxiliary gear ring, and the upper surface of the middle fixed frame 5 is fixedly connected to the main motor 13. The output shaft of the main motor 13 is engaged with the auxiliary gear ring through the drive wheel. The main lead screw 12 is screwed into the sleeve 11. The lower end of the main lead screw 12 is fixedly connected to the moving plate 10. The lower surface of the moving plate 10 is fixedly connected to the fixed plate 7 through the pressure sensor 4, and the lower surface of the fixed plate 7 is movably connected to the detection wheel 6 through the bearing.
[0019] In this embodiment, the tension control mechanism is installed at a suitable position on the circular knitting machine. The yarn is sequentially passed through the guide wheel 9 on the left fixed frame 2, the detection wheel 6 on the middle fixed frame 5, and the guide wheel 9 on the right fixed frame 8, with the fastening layer 14 on the surface of the fastening wheel 15 abutting against the yarn. The auxiliary motor assembly 18 is then activated, causing the fastening wheel 15 to rotate. Through the cooperation of the main gear ring 17 and the fastening layer 14, the fastening wheel 15 synchronously drives the yarn to move at a uniform speed. The tension generated during this movement is then applied to the detection wheel 6, causing the detection wheel 6 to drive the fixed plate 7 to shift vertically. Therefore, the pressure sensor 4, fixedly connected between the fixed plate 7 and the moving plate 10, can transmit pressure data to the electrically connected PLC assembly in real time. When the yarn tension data is less than... When the preset value range is reached, the PLC component starts the electrically connected main motor 13. The main motor 13 drives the sleeve 11 to rotate synchronously through the secondary gear ring meshed with the drive wheel. The sleeve 11 can push the moving plate 10, pressure sensor 4, fixed plate 7 and detection wheel 6 to move in the vertical direction through the screwed main screw 12, so that the detection wheel 6 can press down on the yarn, thereby helping to increase the yarn tension. When the yarn tension is still too low after the detection wheel 6 has completed the position adjustment, the PLC component can speed up the rotation of the electrically connected secondary motor component 18, thereby helping to increase the yarn movement speed and further helping to enhance the yarn tension. Conversely, when the yarn tension data is greater than the preset value range, the operation process is the same. At the same time, the dual tension adjustment mechanism set in this mechanism can effectively enhance the stability of the yarn tension in the circular knitting machine and the convenience of tension adjustment.
[0020] In a preferred embodiment, the right fixed frame 8, the middle fixed frame 5 and the left fixed frame 2, which are fixedly connected to the upper surface of the base 1, are all U-shaped structures. The two sets of guide wheels 9, which are movably connected inside the left fixed frame 2 and the right fixed frame 8, are at the same horizontal height. At the same time, the base 1, the left fixed frame 2, the middle fixed frame 5 and the right fixed frame 8 are combined together to form an E-shaped structure.
[0021] In this embodiment, as Figure 1 The height setting of the guide wheels 9 inside the left fixed frame 2 and the right fixed frame 8 can help enhance the accuracy and convenience of the detection wheel 6 in adjusting the yarn tension, improve the stability of the yarn when adjusting the yarn, and reduce the probability of the yarn jumping.
[0022] In a preferred embodiment, the sleeve 11 movably connected to the middle fixed frame 5 has a cylindrical structure, the axial section of the sleeve 11 has an I-shaped structure, and the movable plate 10 slidably connected to the inner cavity of the middle fixed frame 5 has a rectangular structure, and the size of the movable plate 10 and the inner cavity of the middle fixed frame 5 are adapted to each other.
[0023] In this embodiment, as Figure 1 , Figure 2 and Figure 3 The sleeve 11 allows the movable plate 10 inside the middle fixed frame 5 to move up and down easily via the main screw 12. Furthermore, the size of the movable plate 10 is compatible with the inner cavity of the middle fixed frame 5, which helps to enhance the stability of the movable plate 10 during movement.
[0024] In a preferred embodiment, the main slider 16 is symmetrically connected to both sides of the movable plate 10. The main slider 16 has a square structure, and the main slide groove is opened on the inner side of the middle fixed frame 5 relative to the position of the main slider 16. The length of the main slide groove is less than the height of the inner side of the middle fixed frame 5. At the same time, the movable plate 10 and the main lead screw 12 are combined to form a T-shaped structure.
[0025] In this embodiment, as Figure 1 , Figure 2 and Figure 3 The main slider 16 and the main slide groove are matched in size, which can further enhance the stability of the moving plate 10 when it moves in the vertical plane, reduce the probability of the moving plate 10 being accidentally deviated, reduce the probability of the main lead screw 12 being accidentally bent and deformed and damaged, and also ensure the accuracy of the detection wheel 6 in adjusting the yarn tension.
[0026] As a preferred embodiment, the fixing plate 7 has a square structure and its size is smaller than the size of the inner cavity of the middle fixing frame 5. Two sets of guide rods 3 are symmetrically connected to both ends of the upper surface of the fixing plate 7. Both sets of guide rods 3 have a cylindrical structure, and guide holes are opened on the surface of the moving plate 10 relative to the positions of the guide rods 3. At the same time, the sizes of the guide rods 3 and the guide holes are compatible.
[0027] In this embodiment, as Figure 1 and Figure 2 The guide rod 3 and the guide hole are matched in size, which helps to enhance the stability of the relative movement between the fixed plate 7 and the moving plate 10, and further helps to enhance the accuracy of the pressure sensor 4 in detecting yarn tension through the detection wheel 6.
[0028] In a preferred embodiment, the fastening wheel 15 has a cylindrical structure, and the fastening layer 14 is fixedly connected to the surface of the fastening wheel 15 relative to the groove of the guide wheel 9. The fastening layer 14 has a circular structure, and the size of the fastening layer 14 and the groove of the guide wheel 9 are matched. At the same time, a set of main gear rings 17 are fixedly connected to the same end of the fastening wheel 15 and the guide wheel 9, and the two sets of main gear rings 17 mesh with each other.
[0029] In this embodiment, as Figure 1 , Figure 3 and Figure 4 The main gear ring 17 allows the fastening wheel 15 and the guide wheel 9 to rotate synchronously, thereby ensuring that the yarn can move at a uniform speed under the combined action of the fastening wheel 15 and the guide wheel 9. The fastening layer 14 can be made of silicone material, and the fastening layer 14 can further enhance the fixing effect of the fastening wheel 15 and the guide wheel 9 on the yarn, ensuring that the yarn and the fastening wheel 15 move at the same speed.
[0030] In a preferred embodiment, the loading plate fixedly connected to the outer side of the right fixed frame 8 has a rectangular structure and an F-shaped cross-section. The auxiliary motor assembly 18 fixedly connected to the upper surface of the loading plate consists of an auxiliary motor and a reducer. The auxiliary motor is connected to the fastening wheel 15 through the reducer.
[0031] In this embodiment, as Figure 3 and Figure 4 The structure of the carrier plate can help enhance the stability of the connection between the auxiliary motor assembly 18 and the right fixed frame 8, and ensure the stability of the auxiliary motor assembly 18 after it is fixedly connected.
[0032] The tension control system of this utility model for a circular knitting machine, through the cooperation of the main motor 13, main lead screw 12, sleeve 11, pressure sensor 4, detection wheel 6, fastening wheel 15, and auxiliary motor assembly 18, enables the device to adjust the yarn tension in multiple ways, thereby enhancing the stability of yarn tension adjustment. At the same time, the PLC component can use common brand models on the market, and the auxiliary motors in the main motor 13 and auxiliary motor assembly 18 are both servo motors. Furthermore, the dual tension adjustment mechanism can adjust simultaneously or use a single tension adjustment mechanism, enhancing the convenience of tension adjustment.
Claims
1. A tension control system for a circular knitting machine, comprising: The base (1) is characterized in that: a left fixed frame (2), a middle fixed frame (5) and a right fixed frame (8) are fixedly connected to the upper surface of the base (1) respectively, and guide wheels (9) are movably connected to the left fixed frame (2) and the right fixed frame (8) through bearings. The upper end of the outer side of the right fixed frame (8) is fixedly connected to the auxiliary motor assembly (18) through a carrying plate. The auxiliary motor assembly (18) is connected to the fastening wheel (15) through a coupling. The fastening wheel (15) is movably connected to the upper end of the inner cavity of the right fixed frame (8) through a bearing. The fastening wheel (15) and the guide wheel (9) in the right fixed frame (8) are connected through... The main gear ring (17) meshes with the sleeve (11) on the upper surface of the middle fixed frame (5) via a bearing. The secondary gear ring is fixedly connected to the upper surface of the sleeve (11), and the main motor (13) is fixedly connected to the upper surface of the middle fixed frame (5). The output shaft of the main motor (13) meshes with the secondary gear ring via a drive wheel. The main screw (12) is screwed into the sleeve (11). The lower end of the main screw (12) is fixedly connected to the moving plate (10). The lower surface of the moving plate (10) is fixedly connected to the fixed plate (7) via a pressure sensor (4), and the lower surface of the fixed plate (7) is movably connected to the detection wheel (6) via a bearing.
2. The tension control system for a circular knitting machine according to claim 1, characterized in that, The right fixed frame (8), middle fixed frame (5) and left fixed frame (2) fixedly connected to the upper surface of the base (1) are all U-shaped structures, and the two sets of guide wheels (9) movably connected inside the left fixed frame (2) and right fixed frame (8) are at the same horizontal height. At the same time, the base (1), left fixed frame (2), middle fixed frame (5) and right fixed frame (8) are combined together to form an E-shaped structure.
3. The tension control system for a circular knitting machine according to claim 1, characterized in that, The sleeve (11) movably connected to the middle fixed frame (5) has a cylindrical structure, the axial section of the sleeve (11) has an I-shaped structure, and the movable plate (10) slidably connected to the inner cavity of the middle fixed frame (5) has a rectangular structure, and the size of the movable plate (10) and the inner cavity of the middle fixed frame (5) are compatible.
4. The tension control system for a circular knitting machine according to claim 1, characterized in that, The movable plate (10) is symmetrically connected to the main slider (16) on both sides. The main slider (16) has a square structure. The inner side of the middle fixed frame (5) is provided with a main slide groove corresponding to the position of the main slider (16). The length of the main slide groove is less than the height of the inner side of the middle fixed frame (5). At the same time, the movable plate (10) and the main lead screw (12) are combined together to form a T-shaped structure.
5. The tension control system for a circular knitting machine according to claim 1, characterized in that, The fixing plate (7) has a square structure. The size of the fixing plate (7) is smaller than the size of the inner cavity of the middle fixing frame (5). Two sets of guide rods (3) are symmetrically connected at both ends of the upper surface of the fixing plate (7). Both sets of guide rods (3) have a cylindrical structure. Guide holes are opened on the surface of the moving plate (10) relative to the position of the guide rods (3). At the same time, the size of the guide rods (3) and the guide holes are compatible.
6. The tension control system for a circular knitting machine according to claim 1, characterized in that, The fastening wheel (15) has a cylindrical structure. The fastening layer (14) is fixedly connected to the surface of the fastening wheel (15) relative to the groove of the guide wheel (9). The fastening layer (14) has a circular structure. The size of the fastening layer (14) and the groove of the guide wheel (9) are matched. At the same time, a set of main gear rings (17) are fixedly connected to the same end of the fastening wheel (15) and the guide wheel (9). The two sets of main gear rings (17) mesh with each other.
7. The tension control system for a circular knitting machine according to claim 1, characterized in that, The loading plate fixedly connected to the outer side of the right fixed frame (8) has a rectangular structure and an F-shaped cross-section. The auxiliary motor assembly (18) fixedly connected to the upper surface of the loading plate consists of an auxiliary motor and a reducer. The auxiliary motor is connected to the fastening wheel (15) through the reducer.