Passive sectional yarn feeding spandex frame

Abstract

The utility model relates to the technical field of weaving machine accessories, and discloses a passive segmented yarn feeding spandex frame which comprises a machine body, driving shafts are arranged on the two sides of the rear face of the machine body respectively, driven shafts are arranged on the two sides of the front face of the machine body respectively, each driving shaft comprises a driving mandrel, and one or more stators are fixed to the driving mandrels. The outer side of the stator is sleeved with a rotor, a driving yarn feeding roller is fixed to the outer side of the rotor, and the driving yarn feeding roller is rotationally connected with the driving mandrel through a first bearing; the driven shaft comprises a driven core shaft installed on the machine body, and one or more driven yarn feeding rollers are rotationally connected to the driven core shaft through a second bearing. The driving yarn feeding rollers and the driven yarn feeding rollers are in one-to-one correspondence. According to the passive segmented yarn feeding spandex frame, 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 yarn feeding spandex 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 allow for independent control of individual spandex bobbins, making it difficult to flexibly adjust the speed or tension of the bobbins according to production needs. 3. Synchronous belt drive systems require significant 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 frame, 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 frame, comprising a machine body, drive shafts respectively arranged on the rear two sides of the machine body, and driven shafts respectively arranged on the front two sides of the machine body. The drive shaft includes a drive spindle mounted on the machine body, and one or more stators are fixed on the drive spindle. A rotor is sleeved on the outside of the stator, and a drive yarn feeding roller is fixed on the outside of the rotor. The drive yarn feeding roller is rotatably connected to the drive spindle via a bearing. The driven shaft includes a driven spindle mounted on the machine body, and one or more driven yarn feeding rollers are rotatably connected to the driven spindle via a bearing. The drive yarn feeding rollers and driven yarn feeding rollers correspond one-to-one, and spandex yarn bobbins are placed on the drive yarn feeding rollers and the corresponding driven yarn feeding rollers.

[0005] Furthermore, a support frame is installed on the top of the machine body, and a U-shaped driven wheel bracket is installed at the end of the support frame. A rotating shaft is fixed to the driven wheel bracket, and multiple movable rods corresponding in number and position to the driving yarn feeding roller are rotatably arranged on the rotating shaft. A driven wheel shaft is fixed to the end of each movable rod, and a driven wheel is rotatably connected to the end of the driven wheel shaft through a bearing.

[0006] Furthermore, a hanging plate is provided below the machine body, and yarn breakers are hung on the hanging plate in a number and position corresponding to the driving yarn feeding roller.

[0007] Furthermore, a side guard is provided between two adjacent spandex yarn bobbins, and a side guard seat is provided at the bottom of the side guard, which is mounted on the hanging plate.

[0008] Furthermore, intermediate stop lever seats are installed on both sides of the machine body, and U-shaped intermediate stop levers are provided on the two intermediate stop lever seats.

[0009] Furthermore, a circuit board is provided inside the machine body. 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, and the motor control circuits are electrically connected to the stator.

[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 U3 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 existing technologies, this utility model has at least the following advantages: 1. In this utility model, two pairs of stators and rotors share a single hollow drive spindle, resulting in a more compact overall structure, smaller footprint, effective space saving, and lighter weight. 2. Under the weight of the driven wheel, movable rod, and bearings, the driven wheel presses against the top of the spandex yarn bobbin, maintaining a stable position during yarn feeding and reducing bobbin swaying or deviation. During yarn feeding, rolling friction occurs between the driven wheel and the spandex yarn bobbin, reducing resistance during rotation and making the yarn feeding process smoother, thus reducing yarn tension fluctuations. The driven wheel also prevents the spandex yarn bobbin from jumping due to a significant increase in the speed of the drive yarn feeding roller. 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 bobbin speed or tension according to production needs. 4. Compared with existing synchronous belt conveyor systems, this utility model eliminates the need for regular maintenance of the synchronous belt and synchronous pulley, 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 then controls the corresponding motor to perform relevant actions, allowing them to work synchronously or independently. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention from the left side view.

[0018] Figure 3 This utility model Figure 2 A schematic diagram of the structure of section AA.

[0019] Figure 4 This utility model Figure 2 Schematic diagram of the BB section.

[0020] Figure 5 This is a schematic diagram of the structure of this utility model without the spandex yarn bobbin.

[0021] Figure 6 This is a schematic diagram of the structure of the drive spindle of this utility model.

[0022] Figure 7 This is a schematic diagram of the driven mandrel of this utility model.

[0023] Figure 8 This is a schematic diagram of the connection structure between the drive spindle and the driven spindle of this utility model and the bearing seat one and bearing seat two.

[0024] Figure 9This is a circuit block diagram of the present invention.

[0025] Figure 10 This is a circuit diagram of the power supply circuit of this utility model.

[0026] Figure 11 This is a schematic diagram of the control circuit of the first motor in an embodiment of the present invention.

[0027] Figure 12 This is a schematic diagram of the control circuit of the second motor in an embodiment of the present invention.

[0028] Figure 13 This is a schematic diagram of the control circuit of the third motor in an embodiment of this utility model.

[0029] Figure 14 This is a schematic diagram of the control circuit of the fourth motor in an embodiment of this utility model.

[0030] Figure 15 This is a circuit diagram of the communication circuit of this utility model.

[0031] Reference numerals: 1-Machine body; 2-Spandex yarn bobbin; 3-Drive shaft; 30-Drive spindle; 300-Threading hole; 301-Positioning groove; 31-Bearing spacer one; 32-Bearing one; 33-Rotor; 34-Yarn feed roller; 35-Bearing spacer two; 36-Stator; 4-Driven shaft; 40-Driven hollow spindle; 41-Bearing spacer three; 43-Bearing spacer four; 42-Bearing two; 5-Mounting support frame ; 6-Driven wheel bracket; 7-Rotating shaft; 8-Moving rod; 9-Driven wheel shaft; 10-Driven wheel; 11-Reinforcing plate; 12-Hanging plate; 13-Yarn breaker; 14-Side rail seat; 15-Side rail; 16-Intermediate stop rod seat; 17-Intermediate stop rod; 18-Shaft seat one; 19-Inner step screw one; 20-Outer step screw one; 21-Shaft seat two; 22-Inner step screw two; 23-Outer step screw two. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] See Figures 1-15This embodiment provides a passive segmented spandex yarn feeding frame, including a body 1, within which a circuit board is installed. Drive shafts 3 are respectively installed on the rear two sides of the body 1, and driven shafts 4 are respectively installed on the front two sides of the body 1. Each drive shaft 3 includes a hollow drive spindle 30, with threads on the inner walls of both ends. Two bearing seats 18 are located on the rear two sides of the body 1, each bearing seat 18 having a shaft hole. A positioning groove 301 is provided at the inner end of the drive spindle 30. The shape of the shaft hole 1 matches the shape of the inner end of the drive spindle 30. The inner end of the drive spindle 30 is inserted into the bearing seat 18 and locked onto the body 1 by a hollow stepped screw 19. The positioning groove 301 prevents the drive spindle 30 from rotating. The drive spindle 30 is fixed with two stators 36. A rotor 33 is sleeved on the outside of the stator 36, and a drive yarn feeding roller 34 is fixed on the outside of the rotor 33. The two ends of the drive yarn feeding roller 34 are rotatably connected to the drive spindle 30 via bearing 32. A bearing spacer 31 is provided between the bearing 32 and the stator 36 and is sleeved on the drive spindle 30. A bearing spacer 35 is provided between adjacent bearings 32 and is sleeved on the drive spindle 30. The outer end of the drive spindle is threaded with an outer hollow stepped screw 20. The drive spindle 30 is provided with two wire holes 300, which are respectively located on one side of the two stators 36. The electrical connection wires of the two stators 36, that is, the three-phase wires, pass through the corresponding wire holes 300, the hollow space of the drive spindle 30, and the inner hollow stepped screw 19 and are electrically connected to the circuit board. 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 36 is connected to three-phase power, generating a rotating magnetic field. Under the influence of this rotating magnetic field, the rotor 33 generates an induced current, which in turn causes it to rotate due to electromagnetic force. The rotation of the rotor 33 drives the yarn feeding roller 34 to rotate. In this invention, the two pairs of stators 36 and rotors 33 share a single hollow drive spindle, 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.

[0036] The driven shaft 40 includes a driven spindle 40 parallel to the drive spindle 30. The driven spindle 40 has a hollow internal structure, and its inner walls at both ends are respectively provided with threads. Two bearing seats 21 are provided on the front sides of the machine body 1. The bearing seats 21 have shaft holes. The inner end of the driven spindle 40 is provided with a positioning groove 400. The shape of the shaft hole is adapted to the shape of the inner end of the driven spindle 40. The inner end of the driven spindle 30 is inserted into the bearing seat 21 and locked onto the machine body 1 by a hollow stepped screw 22. The positioning groove 400 prevents the driven spindle 40 from rotating. Two driven yarn feeding rollers 44 are sleeved on the outer side of the driven mandrel 40. The two ends of each driven yarn feeding roller 44 are rotatably connected to the driven mandrel 40 via bearings 42. A bearing spacer 41, sleeved on the driven mandrel 40, is provided between the two bearings 42 of the same driven yarn feeding roller 44. A bearing spacer 43, sleeved on the driven mandrel 40, is provided between the two bearings 42 of adjacent driven yarn feeding rollers 44. The driving yarn feeding roller 34 and the driven yarn feeding roller 44 correspond one-to-one, and each pair of driving and driven yarn feeding rollers 34 can be used to place the spandex yarn bobbin 2. When the driving yarn feeding roller 34 rotates, it contacts the surface of the spandex yarn bobbin 2. Due to the friction between them, the rotation of the driving yarn feeding roller 34 drives the spandex yarn bobbin 2 to rotate accordingly. During the rotation of the spandex yarn bobbin 2, the yarn is fed. The driven yarn feeding roller 44, which is parallel to the driving yarn feeding roller 34, supports the spandex yarn bobbin 2, keeping it in a stable position. When the driving yarn feeding roller 34 drives the spandex yarn bobbin 2 to rotate, the driven yarn feeding roller 44 will also rotate with the spandex yarn bobbin 2, reducing the frictional resistance between the spandex yarn bobbin 2 and the support surface of the driven yarn feeding roller 44, making the rotation of the spandex yarn bobbin 2 smoother and thus feeding yarn more efficiently.

[0037] The outer end of the driven mandrel 40 is threadedly connected to a hollow stepped screw 23. Reinforcing plates 11 are provided on the outer surfaces of the hollow stepped screw 20 and the hollow stepped screw 23 located on the same side, making the overall structure of the spandex frame more stable.

[0038] A support frame 5 is mounted on the top of the machine body 1. A U-shaped driven wheel bracket 6 is mounted on the end of the support frame 5. A rotating shaft 7 is fixed to the driven wheel bracket 6. Four movable rods 8, corresponding in number and position to the four driving yarn feeding rollers 34, are rotatably mounted on the rotating shaft 7. A driven wheel shaft 9 is fixed to the end of each movable rod 8. A driven wheel 10 is rotatably connected to the end of the driven wheel shaft 9 via a bearing. When the spandex yarn bobbin 2 is placed on the driving yarn feeding rollers 34 and the driven yarn feeding rollers 44, the driven wheel 10 is placed on top of the spandex yarn bobbin 2. Under its own weight, it presses down on the top of the spandex yarn bobbin 2, which helps the spandex yarn bobbin 2 maintain a stable position during yarn feeding and reduces the swaying or deviation of the spandex yarn bobbin. When the spandex yarn bobbin 2 rotates to feed yarn, there is rolling friction between the driven wheel 10 and the spandex yarn bobbin 2, which reduces the resistance when the spandex yarn bobbin 2 rotates, making the yarn feeding process smoother and reducing the fluctuation of yarn tension. In addition, under the weight of the driven wheel 10, the movable rod, and the bearing, the driven wheel can prevent the spandex yarn cylinder from jumping up due to a significant increase in the speed of the driving yarn feeding roller.

[0039] A hanging plate 12 is provided below the machine body 1, and multiple yarn breakers 13 are hung on the hanging plate 12, the number and position of which correspond to the driving yarn feeding roller 34. The conveyed yarn passes through the yarn breakers 13, which are used to monitor whether the conveyed spandex yarn is broken. When a yarn is broken, the yarn breaker 13 issues a yarn breakage alarm signal.

[0040] A side rail 15 is provided between two adjacent spandex yarn bobbins 2. A side rail seat 14 is provided at the bottom of the side rail 15, and the side rail seat 14 is mounted on the hanging plate 12. Intermediate stop seats 16 are installed on both sides of the machine body 1, and U-shaped intermediate stop bars 17 are provided on the two intermediate stop seats 16. The side rails and intermediate stop bars 17 play a positioning role for the spandex yarn bobbins 2, restricting the axial movement of the spandex yarn bobbins 2.

[0041] In this utility model's technical solution, the circuit board includes a power supply circuit, four motor control circuits, and a communication circuit. The four motor control circuits are 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.

[0042] 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.

[0043] 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 the three motor drive chip circuits, and the signal output terminals 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.

[0044] 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.

[0045] In the first motor control circuit, the first motor drive chip circuit includes a motor drive chip U3 and its peripheral circuits. The HIN and LIN pins of the motor drive chip U3 are used to connect to the logic input signals of 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 drive 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 the source of the high-side MOSFET Q1 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 the source of the low-side MOSFET Q2 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 output signal of the motor driver chip U3 controls the conduction and cutoff 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.

[0046] 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.

[0047] 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 motor 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Each pair of stator and rotor motors 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 pins 14 and 15 of four main chips, namely chips U2, U7, U12, and U17. Time-division control (including speed, start / stop, and alarm) is performed using address-based methods, sending commands, including start / stop signals and speed signals, to the first, second, third, and fourth motor control circuits to control the four motors separately.

[0052] In this embodiment, two drive yarn feed rollers are provided on the drive spindle. However, in other embodiments, the number of drive yarn feed rollers can be adjusted according to specific application requirements and design. For example, one, three, or other numbers of drive yarn feed rollers may be provided. The number of driven yarn feed rollers corresponds to the number of drive yarn feed rollers.

[0053] In the implementation of this invention, the knitting machinery is connected to the communication circuit via a CAN bus. The communication circuit transmits control signals from the knitting machinery, such as start / stop signals and speed signals, to the main chips of each motor control circuit. Each main chip then controls its corresponding motor to perform relevant actions, allowing them to work synchronously or independently. When one or more yarn feed 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, this invention allows adjustment of the spandex bobbin feeding speed based on the current speed of the knitting equipment, ensuring timely or adequate yarn feeding.

[0054] 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.

[0055] 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 feeding frame, characterized in that: The machine includes a main body, with drive shafts located on both rear sides and driven shafts located on both front sides. Each drive shaft includes a drive spindle mounted on the main body, with one or more stators fixed to it. A rotor is sleeved on the outside of the stator, and a drive yarn feeding roller is fixed on the outside of the rotor. The drive yarn feeding roller is rotatably connected to the drive spindle via a bearing. Each driven shaft includes a driven spindle mounted on the main body, with one or more driven yarn feeding rollers rotatably connected to it via a bearing. The drive yarn feeding rollers and driven yarn feeding rollers correspond one-to-one, and spandex yarn bobbins are placed on the drive yarn feeding rollers and their corresponding driven yarn feeding rollers.

2. The passive segmented spandex feeding frame according to claim 1, characterized in that: A support frame is installed on the top of the machine body. A U-shaped driven wheel bracket is installed at the end of the support frame. A rotating shaft is fixed on the driven wheel bracket. Multiple movable rods, corresponding in number and position to the driving yarn feeding roller, are rotatably arranged on the rotating shaft. A driven wheel shaft is fixed at the end of each movable rod. A driven wheel is rotatably connected to the end of the driven wheel shaft through a bearing.

3. A passive segmented spandex feeding frame according to claim 1 or 2, characterized in that: A hanging plate is provided below the machine body, and yarn breakers are hung on the hanging plate in a number and position corresponding to the driving yarn feeding roller.

4. A passive segmented spandex feeding frame according to claim 3, characterized in that: A side guard is provided between two adjacent spandex yarn bobbins, and a side guard seat is provided at the bottom of the side guard, which is mounted on a hanging plate.

5. A passive segmented spandex feeding frame according to claim 1, characterized in that: The machine body is equipped with intermediate stop rod seats on both sides, and the two intermediate stop rod seats are provided with intermediate stop rods of U-shaped structure.

6. A passive segmented spandex feeding frame according to claim 1, characterized in that: The machine body is equipped with a circuit board, which 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, and the motor control circuits are electrically connected to the stator.

7. A passive segmented spandex feeding 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 feeding 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 U3 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 feeding 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 feeding frame according to claim 6, characterized in that, The communication circuit includes a CAN communication chip and its peripheral circuits.

Images