Passive sectional yarn feeding spandex conveying frame

Abstract

The utility model relates to the technical field of weaving machine accessories, and discloses a passive segmented yarn feeding spandex conveying frame which comprises a machine body, driving shafts are arranged on the two sides of the machine body respectively, each driving shaft comprises a hollow core shaft installed on the machine body, one or more stators are fixed to each hollow core shaft, rotors are arranged on the outer sides of the stators in a sleeved mode, and the stators are fixed to the machine body. A yarn feeding roller is fixed on the outer side of the rotor; the two ends of the yarn feeding roller are rotationally connected with the hollow mandrel through yarn feeding roller bearings, a swing rod frame is fixed to the bottom of the machine body, and swing rod shafts are arranged on the two sides of the end of the swing rod frame respectively. Swing rods corresponding to the yarn feeding rollers in number are rotationally arranged on the swing rod shaft, a roller shaft is arranged at the end of each swing rod and rotationally connected with a roller through a roller bearing, and the roller is sleeved with the spandex yarn barrel. Each spandex yarn drum is provided with an independent motor driving system, the speed and tension of each spandex yarn drum can be independently adjusted, a traditional synchronous belt transmission mode is abandoned, space is saved, and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of loom accessories technology, and in particular to a passive segmented spandex conveyor frame. Background Technology

[0002] Spandex frames are an important component of textile machinery (such as circular knitting machines) used to control and transport spandex yarns, ensuring fabric elasticity and quality. Currently, most spandex frames are driven by synchronous pulleys and synchronous belts, where a main motor drives the synchronous pulleys, which in turn drive multiple spandex frames synchronously via synchronous belts. While this drive method meets production needs to some extent, it still has the following problems: 1. Because multiple spandex frames are driven by the same synchronous belt, wear, loosening, or installation errors in the synchronous belt can cause asynchronous operation between the spandex frames, affecting fabric quality. 2. Synchronous belt drives make it difficult to achieve independent control of individual spandex bobbins, and it is difficult to flexibly adjust the speed or tension of the bobbins according to production needs. 3. Synchronous belt drive systems require a large installation space, increasing the complexity of the equipment structure. 4. Synchronous belts and pulleys require regular maintenance and replacement, increasing equipment operating costs and downtime. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a passive segmented spandex yarn feeding conveyor, which is equipped with an independent motor drive system for each spandex yarn bobbin. Each spandex yarn bobbin can independently adjust its speed and tension, abandoning the traditional synchronous belt drive method, saving space and reducing maintenance costs.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a passive segmented spandex yarn feeding conveyor frame, comprising a machine body, a circuit board inside the machine body, drive shafts on both sides of the machine body, each drive shaft including a hollow mandrel mounted on the machine body, one or more stators fixed to the hollow mandrel, a rotor sleeved on the outside of the stator, and a yarn feeding roller fixed on the outside of the rotor; both ends of the yarn feeding roller are rotatably connected to the hollow mandrel via yarn feeding roller bearings; a swing arm frame is fixed to the bottom of the machine body, and swing arm shafts are respectively provided on both sides of the ends of the swing arm frame; a number of swing rods corresponding to the number of yarn feeding rollers are rotatably mounted on the swing arm shafts, and a roller shaft is provided at the end of each swing rod, with a roller shaft rotatably connected to the roller shaft via a roller bearing; wherein, during yarn feeding, the spandex yarn bobbin is sleeved on the roller, the swing rods swing towards the side of the yarn feeding roller, the spandex yarn bobbin contacts the yarn feeding roller, and the spandex yarn is fed under the drive of the rolling yarn feeding roller.

[0005] Furthermore, the roller includes a cylindrical body, a fixed plate is provided on one side of the cylindrical body, a plurality of hollowed-out portions are provided at intervals on the cylindrical body, a limiting spring is provided at the end of the hollowed-out portion away from the fixed plate, and the cylindrical body is also provided with a plurality of protruding ridges.

[0006] Furthermore, the inner side of the fixed plate is provided with a bearing mounting groove, and a roller bearing is installed in the bearing mounting groove. The roller bearing is sleeved on the outer side of the roller shaft. The inside of the roller shaft is a hollow structure, and both ends of it are threaded with fastening bolts. Its outer end is locked to the end of the swing rod by fastening screws.

[0007] Furthermore, the swing rod includes a sleeve fitted onto the swing rod shaft, a swing arm is connected to the outer wall of the sleeve, a mounting plate is provided at the end of the swing arm, a reinforcing plate is provided on the outer side of the swing arm, and the two ends of the reinforcing plate are respectively connected to the sleeve and the mounting plate.

[0008] Furthermore, the hollow mandrel is provided with a number of through holes that match the number of stators mounted on it, the inner end of the hollow mandrel is provided with a positioning groove, the machine body is provided with a shaft hole that matches the shape of the inner end of the hollow mandrel, the hollow mandrel is locked to the machine body by an inner hollow stepped screw, and the electrical connection wires of the stator pass through the through holes, the hollow mandrel and the inner hollow stepped screw to be electrically connected to the circuit board.

[0009] Furthermore, the circuit board includes a power supply circuit, multiple motor control circuits, and a communication circuit. The power supply circuit supplies power to the motor control circuits and the communication circuits. The communication circuit is connected to the motor control circuits. Each motor control circuit is electrically connected to a stator. The knitting machine is connected to the communication circuit via a CAN bus.

[0010] Furthermore, the motor control circuit includes a main chip and three motor drive chip circuits. The main chip is connected to the signal input terminals of the three motor drive chip circuits respectively, and the signal output terminals of the three motor drive chip circuits are connected to the three phase lines of the stator respectively.

[0011] Furthermore, the motor driver chip circuit includes a motor driver chip and its peripheral circuits. The HIN and LIN pins of the motor driver chip are used to connect to the logic input signals of the main chip, respectively. Its VCC pin is connected to a 15V power supply, and its GND pin is grounded. The HO and LO pins of the motor driver chip are connected to the high-side MOSFET and the low-side MOSFET respectively through a first resistor and a second resistor. A first diode is also connected in reverse between the HO pin of the motor driver chip U3 and the gate of the high-side MOSFET, and a second diode is also connected in reverse between the LO pin of the motor driver chip and the gate of the low-side MOSFET. The drain of the high-side MOSFET is connected to a 155V power supply, the source of the high-side MOSFET is connected to the output terminal, the drain of the low-side MOSFET is connected to the output terminal, and the source of the low-side MOSFET is grounded.

[0012] Furthermore, the power supply circuit includes a power protection circuit, a rectifier circuit, a filter circuit, a step-down circuit one, a step-down circuit two, and a step-down circuit three connected in sequence.

[0013] Furthermore, the communication circuit includes a CAN communication chip and its peripheral circuitry.

[0014] Beneficial effects

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] 1. This utility model uses a single hollow mandrel for both stators and rotors, resulting in a more compact overall structure, smaller footprint, and lighter weight. 2. The spandex yarn bobbin is stably mounted on the roller via a swing structure formed by a swing arm frame, swing arm shaft, swing rod, and roller. This ensures the spandex yarn bobbin remains in a stable position during yarn feeding, reducing swaying or deviation. During yarn feeding, friction exists between the spandex yarn bobbin and the feeding roller. Under the action of this friction, the spandex yarn bobbin passively rotates with the feeding roller, achieving yarn feeding. The weight of the spandex yarn bobbin itself, plus the weight of the swing rod and roller, prevents the spandex yarn bobbin from jumping due to a significant increase in the feeding roller's speed. 3. In this utility model, multiple spandex yarn bobbins on the spandex frame are independently controlled and fed by corresponding motors, allowing for flexible adjustment of the yarn bobbin speed or tension according to production needs. 4. Compared to existing synchronous belt conveyor systems, this utility model eliminates the need for regular maintenance of the synchronous belt and pulleys, reducing equipment operating costs and downtime. 5. In this invention, each pair of stator and rotor motors can be independently controlled. The knitting machinery is connected to the communication circuit via a CAN bus. The communication circuit transmits the control signals of the knitting machinery, such as start / stop signals and speed signals, to the main chip of each motor control circuit. Each main chip controls the corresponding motor to perform relevant actions, allowing them to work synchronously or independently. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the right side view of the present invention.

[0019] Figure 3 This is a top view of the structure of this utility model.

[0020] Figure 4 This utility model Figure 3 A schematic diagram of the structure of section AA.

[0021] Figure 5 This is a schematic diagram of the structure of the roller of this utility model.

[0022] Figure 6 This is a schematic diagram of the connection structure between the roller and the swing rod of this utility model.

[0023] Figure 7 This utility model Figure 6 A schematic diagram of the structure of the BB section.

[0024] Figure 8 This is a schematic diagram of the hollow mandrel of this utility model.

[0025] Figure 9 This is a circuit block diagram of the present invention.

[0026] Figure 10 This is a circuit diagram of the power supply circuit of this utility model.

[0027] Figure 11 This is a schematic diagram of the first motor control circuit according to an embodiment of the present invention.

[0028] Figure 12 This is a schematic diagram of the second motor control circuit according to an embodiment of the present invention.

[0029] Figure 13 This is a schematic diagram of the third motor control circuit in an embodiment of the present invention.

[0030] Figure 14 This is a schematic diagram of the fourth motor control circuit according to an embodiment of the present invention.

[0031] Figure 15 This is a circuit diagram of the communication circuit of this utility model.

[0032] Reference numerals: 1-Spandex yarn bobbin; 2-Machine body; 20-Shaft seat; 3-Swing arm frame; 30-Fixing rod; 300-Reinforcing rib; 31-Mounting part; 4-Drive shaft; 40-Hollow mandrel; 401-Threading hole; 402-Positioning groove; 41-Stator; 42-Rotor; 43-Yarn feed roller bearing; 44-Shim 1; 45-Shaft sleeve; 46-Yarn feed roller; 5-Swing arm; 50-Sleeve; 51-Swing arm; 52-Mounting plate; 53-Reinforcing piece ; 6-Roller; 60-Fixing disc; 61-Bodiment; 62-Raised rib; 63-Hollowed part; 64-Limiting spring; 640-Inclined part; 641-Horizontal part; 65-Bearing mounting groove; 7-Hanging plate; 8-Yarn breaker; 9-Swing rod shaft; 90-Steel retainer; 10-Circuit board; 11-Roller bearing; 12-Roller shaft; 120-Raised ring; 13-Washer 2; 14-Fastening bolt; 15-Outer hollow stepped screw; 16-Inner hollow stepped screw. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, a detailed description is provided below in conjunction with the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] See Figures 1-15This embodiment provides a passive segmented spandex yarn feeding conveyor frame, including a body 2, inside which a circuit board 10 is installed. Drive shafts 4 are respectively installed on both sides of the body 1. Each drive shaft 4 includes a hollow spindle 40, with two stators 41 fixed to the hollow spindle 40. A rotor 42 is sleeved on the outside of each stator 41, and a yarn feeding roller 46 is fixed on the outside of each rotor 42. The two ends of the yarn feeding roller 46 are rotatably connected to the hollow spindle 40 via yarn feeding roller bearings 43. A bushing 45 is provided between the yarn feeding roller bearing 43 and the stator 41, and a gasket 44 is provided between adjacent yarn feeding roller bearings 43, also sleeved on the hollow spindle 40. The machine body has two opposing sidewalls with inwardly protruding bearing seats 20, each bearing seat having a shaft hole. The inner end of the hollow mandrel 40 is provided with a positioning groove 401. The shape of the shaft hole matches the shape of the inner end of the hollow mandrel 40. The positioning groove 401 prevents the hollow mandrel 40 from rotating. The inner end of the hollow mandrel 40 is internally threaded and locked to the machine body 2 by an internal hollow stepped screw 16. The outer end of the hollow mandrel 40 is internally threaded and threadedly connected to an external hollow stepped screw 15.

[0037] The hollow mandrel 40 is provided with two wire holes 400, which are respectively located on one side of the two stators. The electrical connection wires of the two stators 41, that is, the three-phase wires, pass through the corresponding wire holes 400, the hollow mandrel, and the hollow stepped screws 16 to be electrically connected to the circuit board 10.

[0038] Each pair of stators and rotors forms a motor. In this embodiment, there are four motors: the first motor, the second motor, the third motor, and the fourth motor. In implementation, the stator 41 is connected to three-phase power and generates a rotating magnetic field. Under the influence of this rotating magnetic field, the rotor 42 generates an induced current and is thus subjected to electromagnetic force, causing it to rotate. The rotation of the rotor 42 causes the yarn feeding roller 46 to rotate. In this invention, the two pairs of stators 36 and rotors 33 share a hollow mandrel 40, resulting in a more compact overall structure, smaller footprint, effective space saving, and lighter weight. By changing the stator power supply parameters, the rotor speed and direction can be easily adjusted, flexibly adapting to different production processes.

[0039] The bottom of the body 2 is fixed with an arc-shaped swing arm frame 3. The swing arm frame 3 includes an arc-shaped fixing rod 30 fixed to the body 2. The end of the fixing rod 30 is provided with a mounting part 31. The mounting part 31 is a cylindrical structure, and swing arm shafts 9 are respectively inserted into both sides of the mounting part 31. The fixing rod 30 is provided with a reinforcing rib 300, which is connected to the body and the mounting part 31, and serves to strengthen the structural strength of the swing arm frame 3.

[0040] Four swing rods 5 are rotatably mounted on the swing rod shaft 9. Each swing rod 5 includes a sleeve 50 fitted onto the swing rod shaft 9. A swing arm 51 is connected to the outer wall of the sleeve 50. A mounting plate 52 is provided at the end of each swing arm 51. A reinforcing plate 53 for strengthening the swing rod structure is provided on the outer side of the swing arm 51. The two ends of the reinforcing plate 53 are connected to the sleeve 50 and the mounting plate 52, respectively. A retaining ring 90 is provided on the swing rod shaft 9 to limit the displacement of the swing rods 5. A roller shaft 12 is provided at the end of each swing rod 5. The roller shaft 12 has a hollow internal structure, and both ends of its inner side are threaded. Its outer end is locked to the mounting plate 52 by a fastening screw 14. A convex ring 120 is provided on the roller shaft 12, and the outer side of the convex ring 120 is in close contact with the mounting plate 52. The roller shaft 12 is rotatably connected to the roller 6 via the roller bearing 11. Specifically, the roller 6 includes a cylindrical body 61, a fixed plate 60 is provided on one side of the cylindrical body 61, and a bearing mounting groove 65 is provided on the inner side of the fixed plate 60. The roller bearing 11 is installed in the bearing mounting groove 65 and is sleeved on the outer side of the roller shaft 12. The inner end of the roller shaft 12 is threadedly connected to a fastening bolt 14, and a washer 13 is provided on the fastening bolt 14. The washer 13 abuts against the inner side of the inner ring of the roller bearing 11, and the outer side of the inner ring of the roller bearing 11 abuts against the inner side of the convex ring 120.

[0041] The cylindrical body 61 is provided with multiple hollowed-out portions 63 at intervals. A limiting spring piece 64 is provided at one end of each hollowed-out portion 63 away from the fixing plate, and the other end of the limiting spring piece 64 is a free end located outside the cylindrical body. The limiting spring piece 64 includes an inclined portion 640 that slopes outward from the cylindrical body and a horizontal portion 641 located at the end of the inclined portion. The longitudinal cross-section of the horizontal portion 641 and the inclined portion 640 is an arc shape coaxial with the cylindrical body 61. The cylindrical body is also provided with multiple protruding ribs 62. The end of the cylindrical body 61 away from the fixing plate 60 has a trumpet-shaped structure to facilitate the insertion of the spandex yarn bobbin 1. The portion of the protruding rib 62 located above the trumpet-shaped structure of the fixing plate 60 slopes towards the end of the cylindrical body 1. When the spandex yarn spool 1 is inserted into the bobbin 61, the limiting spring 64 deforms due to its elasticity, pressing against the spandex yarn spool and firmly fixing it to the bobbin 61. This prevents the spandex yarn spool 1 from shaking or accidentally coming off the bobbin 61, ensuring the stability of the installation. The inclined portion of the protruding rib 62 facilitates the insertion into the bobbin 61, and the protruding rib 62 roughens the contact surface between the spandex yarn spool 1 and the bobbin 61, increasing friction and further improving the stability of the installation. At the same time, the protruding rib 62 also improves the structural strength of the bobbin 61.

[0042] The spandex yarn bobbin oscillation structure, formed by the combination of the swing arm frame 3, swing arm shaft 9, swing arm 5, and roller, stably mounts the spandex yarn bobbin 1 onto the roller 6, maintaining a stable position for the spandex yarn bobbin 1 during yarn feeding and reducing swaying or deviation. During yarn feeding, the spandex yarn bobbin 1 is mounted on the roller 6, and the swing arm 5 rotates towards the side of the yarn feeding roller 46, abutting against it. The spandex yarn bobbin 1 contacts the yarn feeding roller 46, which rolls under the drive of a motor composed of a stator 41 and a rotor 42. Friction exists between the spandex yarn bobbin 1 and the yarn feeding roller 46; under the action of this friction, the spandex yarn bobbin 1 passively rotates with the yarn feeding roller 46, thus achieving yarn feeding. The weight of the spandex yarn bobbin 1 itself, plus the weight of the swing arm 5 and roller 6, prevents the spandex yarn bobbin 1 from jumping due to a significant increase in the rotational speed of the yarn feeding roller 46.

[0043] The bottom of the machine body 2 is provided with a hanging plate 7, on which are hung yarn breakers in positions and quantities corresponding to the yarn feeding roller. The yarn fed by the spandex yarn bobbin 1 on the yarn feeding roller 46 passes through the yarn breakers 8. The yarn breakers 8 are used to monitor whether the fed spandex yarn is broken. When the yarn is broken, the yarn breakers 8 issue a yarn breakage alarm signal.

[0044] The circuit board includes a power supply circuit, four motor control circuits, and a communication circuit. The four motor control circuits are designated as a first motor control circuit, a second motor control circuit, a third motor control circuit, and a fourth motor control circuit. The power supply circuit supplies power to the motor control circuits and the communication circuit. The communication circuit is connected to the motor control circuits. Each motor control circuit is electrically connected to a stator. Specifically, the first motor control circuit is connected to the first motor, the second motor control circuit is connected to the second motor, the third motor control circuit is connected to the third motor, and the fourth motor control circuit is connected to the fourth motor. The knitting machinery is connected to the communication circuit via a CAN bus.

[0045] The power supply circuit includes a power protection circuit, a rectifier circuit, a filter circuit, and step-down circuits one, two, and three connected in sequence. The power protection circuit, rectifier circuit, and filter circuit form the filter circuit, converting the input 110V AC power into 155V DC power. The 155V DC power is then converted to 15V DC power by step-down circuit one, and further converted to 5V DC power by step-down circuit two, which is the VCC power supply. The 5V DC power supply is then converted to 3.3V DC power by step-down circuit three.

[0046] The motor control circuit includes a main chip and three motor drive chip circuits, namely a first motor drive chip circuit, a second motor drive chip circuit, and a third motor drive chip circuit. The main chip is connected to the signal input terminals of each of the three motor drive chip circuits, and the signal output terminals of each of the three motor drive chip circuits are connected to the three phase lines of the stator. Specifically, the signal output terminal of the first motor drive chip circuit is connected to the U phase line of the stator, the signal output terminal of the second motor drive chip circuit is connected to the V phase line of the stator, and the signal output terminal of the third motor drive chip circuit is connected to the W phase line of the stator.

[0047] It should be noted that, as Figure 11 As shown, in the first motor control circuit, the first motor drive chip circuit, the second motor drive chip circuit, and the third motor drive chip circuit are respectively the first motor drive chip circuit, the first motor drive chip circuit, and the first motor drive chip circuit. And so on, as... Figures 12-14 As shown, in the second motor control circuit, the three corresponding motor drive chip circuits are the second motor first drive chip circuit, the second motor second drive chip circuit, and the second motor third drive chip circuit; in the third motor control circuit, the corresponding circuits are the third motor first drive chip circuit, the third motor second drive chip circuit, and the third motor third drive chip circuit. In the fourth motor control circuit, the corresponding circuits are the fourth motor first drive chip circuit, the fourth motor second drive chip circuit, and the fourth motor third drive chip circuit.

[0048] In the first motor control circuit, the first motor driver chip circuit includes a motor driver chip U3 and its peripheral circuits. The HIN and LIN pins of the motor driver chip U3 are used to connect to the logic input signals from the main chip U2, respectively. Its VCC pin is connected to a 15V power supply, and its GND pin is grounded. A capacitor C15 is connected between the VCC and GND pins. The HO and LO pins of the motor driver chip U3 are connected to the gates of the high-side MOSFET Q1 and the low-side MOSFET Q2 respectively through a first resistor R2 and a second resistor R6. A first diode D7 is connected in reverse between the HO pin of the motor driver chip U3 and the gate of the high-side MOSFET Q1. A second diode D8 is connected in reverse between the LO pin of the motor driver chip U3 and the gate of the low-side MOSFET Q2. The drain of the high-side MOSFET Q1 is connected to a 155V power supply, and its source is connected to the output terminal OUTU1, which is connected to the VS pin of the motor driver chip U3. The drain of the low-side MOSFET Q2 is connected to the output terminal OUTU1, and its source is grounded. A third diode D6 is connected to the VCC and VB pins of the motor driver chip U3, and a capacitor C14 is connected between the VB pin and the VS pin. The motor driver chip U3 outputs signals to control the on / off states of the high-side MOSFET Q1 and the low-side MOSFET Q2. When HIN is low, the high-side MOSFET Q1 is off; when HIN is high, the high-side MOSFET Q1 is on. When LIN is low, the low-side MOSFET Q2 is on; when LIN is high, the low-side MOSFET Q2 is off. When the high-side MOSFET Q1 is turned on and the low-side MOSFET Q2 is turned off, the output terminal OUTU1 outputs a high level of 155V. When the high-side MOSFET Q1 is turned off and the low-side MOSFET Q2 is turned on, the output terminal OUTU1 outputs a low level of 0V.

[0049] In the first motor control circuit, the second and third motor drive chip circuits have the same structure as the first motor drive chip circuit. The connection relationships and functions of each component are the same as those of the first motor drive chip circuit, except that the component numbers are different, which will not be described in detail here.

[0050] In this embodiment, the main chip U2 of the first motor control circuit has its 3rd and 4th pins connected to the LIN and HIN pins of the motor driver chip U3 of the first motor driver chip circuit via resistors R3 and R4, respectively. Its 5th and 6th pins are connected to the LIN and HIN pins of the motor driver chip U4 of the second motor driver chip circuit via resistors R5 and R7, respectively. Its 7th and 8th pins are connected to the LIN and HIN pins of the motor driver chip U5 of the third motor driver chip circuit via resistors R8 and R9, respectively. The output terminals of the first, second, and third motor driver chip circuits are connected to the U-connection, V-connection, and W-connection terminals of the first stator via interface P2, respectively. Pins 18, 17, and 16 of the main chip are connected to the main chip programming interface SWD1 to program external programs into the main chip to control the stator speed.

[0051] The second, third, and fourth motor control circuits have the same structure as the first motor control circuit. The connection relationships and functions of each component are the same as those of the first motor control circuit, except that the component numbers are different, which will not be described in detail here.

[0052] In the first motor control circuit, pin 24 of the main chip U2 is connected to the emitter of transistor Q25. The base of transistor Q25 is connected to pin 1 of the yarn breakage alarm interface P3 through resistor R62. Pin 2 of the yarn breakage alarm interface P3 and the collector of transistor Q25 are grounded. The base of transistor Q25 is connected to power supply VCC through resistor R60, and the emitter of transistor Q25 is connected to power supply VCC through resistor R61. Four yarn breakers 8 are connected in parallel to the yarn breakage alarm interface P3. Each of the four yarn breakers 8 transmits its corresponding spandex yarn breakage alarm signal to the main chip U2, which then transmits the yarn breakage alarm signal to the knitting equipment through a communication circuit.

[0053] In this utility model's technical solution, the communication circuit includes a communication chip U6 and its peripheral circuitry. The GND pin of the communication chip U6 is grounded; the VCC pin is connected to a 5V power supply; and the VIO pin is connected to a 3.3V voltage, providing a suitable operating level for the communication chip. The TXD and RXD pins of the communication chip U6 are used for data transmission and reception. The CANH pin is connected to pin 1 of the CAN communication interface P4 via fuse F2, the CANL pin is connected to pin 2 of the CAN communication interface P4 via fuse F3, and pin 3 of the CAN communication interface P3 is connected to EARTH, enabling connection to an external CAN network through the CAN communication interface. One end of diodes DT1 and DT2 is connected to the CANH pin, and the other end of diode DT1 is grounded; the other end of diode DT2 is connected to the CANL pin, and one end of diode DT3 is connected to the CANL pin and the other end is grounded. Diodes DT1, DT2, and DT3 are bidirectional transient voltage suppression diodes used to protect the circuit from transient overvoltage surges. A resistor R13 is connected between the CANH and CANL pins, and the STB pin is grounded via resistor R12. The two windings of common-mode inductor FQ1 are connected between pin 2 of fuse F2 and pin 2 of fuse F3, respectively, to suppress common-mode interference, and its ground terminal is connected to EARTH.

[0054] Each motor consisting of a stator and rotor can be controlled independently. The knitting equipment is connected to the communication circuit via a CAN bus. The TXD and RXD pins of the communication circuit are simultaneously connected to four main chips, namely chips U2, U7, U12, and U17. Time-division control is performed using address-based methods to send commands, including start / stop signals and speed signals, to the first, second, third, and fourth motor control circuits, thereby controlling the four motors separately.

[0055] In this embodiment, two yarn feeding rollers are provided on the hollow mandrel. However, in other embodiments, the number of yarn feeding rollers can be adjusted according to specific application requirements and design. For example, one, three, or other numbers of yarn feeding rollers can be provided on the hollow mandrel. The number of swing rods 9 and rollers corresponds to the number of driving yarn feeding rollers. The retaining ring 90 is provided as needed, either as an integral part of the swing rod shaft 9 or as a detachable retaining ring 90. The detachable retaining ring 90 is locked to the swing rod shaft 9 by screws.

[0056] In this invention, each pair of stator and rotor motors can be independently controlled. The knitting machine is connected to the communication circuit via a CAN bus. The communication circuit transmits control signals from the knitting machine, such as start / stop signals and speed signals, to the main chip of each motor control circuit. Each main chip controls the corresponding motor to perform relevant actions, allowing them to work synchronously or independently. When one or more yarn paths are paused, the knitting equipment sends a stop signal, stopping the corresponding motor and the spandex bobbin from feeding yarn. This prevents false alarms from the edge thread frame or yarn tangling caused by excessive yarn feeding. When yarn is needed, the knitting equipment can send a start signal in advance to start the corresponding motor, avoiding yarn tension. Furthermore, in this invention, the yarn feeding speed of the spandex bobbin can be adjusted according to the current speed of the knitting equipment to ensure timely or adequate yarn feeding.

[0057] The spandex yarn bobbins on this utility model are independently controlled and conveyed by corresponding motors. The speed or tension of the yarn bobbins can be flexibly adjusted according to production needs. The spandex yarn bobbin of this utility model has a compact structure and occupies little space. Compared with the existing synchronous belt conveyor system, this utility model does not require regular maintenance of the synchronous belt and synchronous pulley, reducing equipment operating costs and downtime.

[0058] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A passive segmented spandex yarn feeding conveyor frame, characterized in that: The device includes a machine body containing a circuit board. Drive shafts are located on both sides of the machine body, each drive shaft comprising a hollow mandrel mounted on the machine body. One or more stators are fixed to the hollow mandrel, and a rotor is sleeved on the outside of the stator. A yarn feeding roller is fixed on the outside of the rotor. Both ends of the yarn feeding roller are rotatably connected to the hollow mandrel via yarn feeding roller bearings. A swing arm frame is fixed to the bottom of the machine body, and swing arm shafts are located on both sides of the ends of the swing arm frame. A number of swing rods corresponding to the number of yarn feeding rollers are rotatably mounted on the swing arm shafts. A roller shaft is located at the end of each swing rod, and a roller is rotatably connected to the roller shaft via a roller bearing. During yarn feeding, a spandex yarn bobbin is sleeved on the roller, and the swing rods swing towards the yarn feeding roller, bringing the spandex yarn bobbin into contact with the yarn feeding roller. Driven by the rolling yarn feeding roller, the spandex yarn is conveyed.

2. The passive segmented spandex conveyor frame according to claim 1, characterized in that: The roller includes a cylinder body, a fixed plate is provided on one side of the cylinder body, a plurality of hollowed-out portions are provided at intervals on the cylinder body, a limit spring is provided at the end of the hollowed-out portion away from the fixed plate, and the cylinder body is also provided with a plurality of protruding ridges.

3. A passive segmented spandex conveyor frame according to claim 2, characterized in that: The inner side of the fixed plate is provided with a bearing mounting groove, and a roller bearing is installed in the bearing mounting groove. The roller bearing is sleeved on the outer side of the roller shaft. The inside of the roller shaft is a hollow structure, and both ends are threaded with fastening bolts. Its outer end is locked to the end of the swing rod by fastening screws.

4. A passive segmented spandex conveyor frame according to claim 1, characterized in that: The swing rod includes a sleeve fitted on the swing rod shaft, a swing arm connected to the outer side wall of the sleeve, a mounting plate provided at the end of the swing arm, a reinforcing plate provided on the outer side of the swing arm, and the two ends of the reinforcing plate being connected to the sleeve and the mounting plate respectively.

5. A passive segmented spandex conveyor frame according to claim 1, characterized in that: The hollow mandrel has a number of through holes matching the number of stators mounted on it. The inner end of the hollow mandrel has a positioning groove. The machine body has a shaft hole that matches the shape of the inner end of the hollow mandrel. The hollow mandrel is locked to the machine body by a hollow stepped screw. The electrical connection wires of the stator pass through the through holes, the hollow mandrel, and the hollow stepped screw and are electrically connected to the circuit board.

6. A passive segmented spandex conveyor frame according to claim 1, characterized in that: The circuit board includes a power supply circuit, multiple motor control circuits, and a communication circuit. The power supply circuit supplies power to the motor control circuits and the communication circuits. The communication circuit is connected to the motor control circuits. Each motor control circuit is electrically connected to a stator. The knitting machine is connected to the communication circuit via a CAN bus.

7. A passive segmented spandex conveyor frame according to claim 6, characterized in that: The motor control circuit includes a main chip and three motor drive chip circuits. The main chip is connected to the signal input terminals of the three motor drive chip circuits respectively, and the signal output terminals of the three motor drive chip circuits are connected to the three phase lines of the stator respectively.

8. A passive segmented spandex conveyor frame according to claim 7, characterized in that: The motor driver chip circuit includes a motor driver chip and its peripheral circuits. The HIN and LIN pins of the motor driver chip are used to connect to the logic input signals of the main chip, respectively. Its VCC pin is connected to a 15V power supply, and its GND pin is grounded. The HO and LO pins of the motor driver chip are connected to the high-side MOSFET and the low-side MOSFET respectively through a first resistor and a second resistor. A first diode is also connected in reverse between the HO pin of the motor driver chip U3 and the gate of the high-side MOSFET, and a second diode is also connected in reverse between the LO pin of the motor driver chip and the gate of the low-side MOSFET. The drain of the high-side MOSFET is connected to a 155V power supply, the source of the high-side MOSFET is connected to the output terminal, the drain of the low-side MOSFET is connected to the output terminal, and the source of the low-side MOSFET is grounded.

9. A passive segmented spandex conveyor frame according to claim 6, characterized in that: The power supply circuit includes a power protection circuit, a rectifier circuit, a filter circuit, a step-down circuit one, a step-down circuit two, and a step-down circuit three connected in sequence.

10. A passive segmented spandex conveyor frame according to claim 6, characterized in that, The communication circuit includes a CAN communication chip and its peripheral circuits.

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